摘要：擬建道路穿越薛店站場，包(bao)含6股道，且具有較(jiao)大高差。根據(ju)項(xiang)目特點與難(nan)點，介紹了多(duo)(duo)股道大高差條件(jian)下頂進(jin)框架橋的(de)設計方(fang)案(an)(an)，并基于對(dui)施(shi)工(gong)技術、施(shi)工(gong)工(gong)期和對(dui)運營鐵(tie)路的(de)影響程度等方(fang)面的(de)考慮，重點對(dui)鐵(tie)路架空(kong)方(fang)案(an)(an)體系通過三(san)種方(fang)案(an)(an)進(jin)行(xing)詳細分(fen)析比較(jiao)，提出采用階梯(ti)承臺的(de)方(fang)法解決多(duo)(duo)股道線路間的(de)高差問題，并通過合理布置使部分(fen)樁二次利用，可為類似工(gong)程提供借(jie)鑒。

關鍵詞：多股(gu)道(dao)；大高差；階梯承臺；鐵路架空(kong)

1工程概況

本(ben)工程位(wei)于新鄭市(shi)薛店(dian)鎮，規劃(hua)為(wei)雙(shuang)向(xiang)四車(che)道(dao)(dao)(dao)的城市(shi)主干(gan)路(lu)(lu)(lu)(lu)(lu)，根據規劃(hua)，友誼(yi)路(lu)(lu)(lu)(lu)(lu)穿越京廣(guang)鐵路(lu)(lu)(lu)(lu)(lu)建設工程亟需(xu)打通，以完善該區域路(lu)(lu)(lu)(lu)(lu)網結構。擬建道(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)從東向(xiang)西依次穿越到(dao)發(fa)線(xian)(xian)3道(dao)(dao)(dao)、京廣(guang)鐵路(lu)(lu)(lu)(lu)(lu)下行線(xian)(xian)、京廣(guang)鐵路(lu)(lu)(lu)(lu)(lu)上(shang)行線(xian)(xian)、4道(dao)(dao)(dao)、6道(dao)(dao)(dao)、8道(dao)(dao)(dao)，鐵路(lu)(lu)(lu)(lu)(lu)線(xian)(xian)間距沿道(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)中(zhong)心線(xian)(xian)依次為(wei)7.55m、5.08m、6.18m、5.32m、6.56m，全部(bu)為(wei)電(dian)氣(qi)化鐵路(lu)(lu)(lu)(lu)(lu)，道(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)與(yu)京廣(guang)鐵路(lu)(lu)(lu)(lu)(lu)下行線(xian)(xian)相交處(chu)鐵路(lu)(lu)(lu)(lu)(lu)里程為(wei)K709+970.9，道(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)中(zhong)線(xian)(xian)與(yu)鐵路(lu)(lu)(lu)(lu)(lu)交角(jiao)為(wei)87.2°。軌道(dao)(dao)(dao)標高差(cha)異較大，軌頂最(zui)低處(chu)為(wei)到(dao)發(fa)線(xian)(xian)8道(dao)(dao)(dao)，標高為(wei)155.60m，最(zui)高處(chu)為(wei)京廣(guang)下行線(xian)(xian)，標高156.23m，相差(cha)高達63cm。

2工程地質概況及工程難點

2.1工程(cheng)地(di)(di)質(zhi)概況。1）地(di)(di)層巖性。沿(yan)線(xian)地(di)(di)層主要(yao)(yao)為第(di)(di)四系沖洪(hong)積成因的(de)(de)粉砂、粉土(tu)、粉質(zhi)黏土(tu)，沿(yan)線(xian)地(di)(di)層變化不(bu)大(da)(da)。2）地(di)(di)下水(shui)(shui)。沿(yan)線(xian)場(chang)地(di)(di)水(shui)(shui)位埋深較(jiao)大(da)(da)，穩定水(shui)(shui)位埋深在(zai)18.0m左右，但在(zai)勘察時第(di)(di)3單元(yuan)層見(jian)上層滯(zhi)水(shui)(shui)，水(shui)(shui)量不(bu)大(da)(da)，主要(yao)(yao)為大(da)(da)氣降水(shui)(shui)。2.2工程(cheng)難(nan)(nan)點。1）鄭州航空港區(qu)作為首個國家級航空港經(jing)濟綜合試(shi)驗區(qu)，在(zai)“一(yi)帶(dai)一(yi)路”的(de)(de)帶(dai)領下，發(fa)展一(yi)日千(qian)里，薛店站做為航空港區(qu)后(hou)勤保障的(de)(de)一(yi)部分，即將升(sheng)為二級物流基地(di)(di)，貨運繁忙，對(dui)(dui)工程(cheng)影響(xiang)程(cheng)度(du)要(yao)(yao)求嚴、對(dui)(dui)工期要(yao)(yao)求高(gao)。2）經(jing)調(diao)查查明，鐵路設備情況復(fu)雜，通信(xin)(xin)、信(xin)(xin)號、電力及電氣化設施均受影響(xiang)，增(zeng)加設計和施工難(nan)(nan)度(du)。3）包含股道較(jiao)多，且(qie)股道間高(gao)差(cha)較(jiao)大(da)(da)，線(xian)路架空難(nan)(nan)度(du)高(gao)。

3方案比選

方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)選(xuan)擇(ze)基(ji)(ji)(ji)(ji)(ji)于(yu)以(yi)(yi)下(xia)(xia)(xia)因素考(kao)慮(lv)：①立(li)交(jiao)(jiao)在(zai)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)對(dui)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)基(ji)(ji)(ji)(ji)(ji)穩(wen)定(ding)(ding)性(xing)影響；②盡可(ke)(ke)能(neng)(neng)減少(shao)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)設(she)(she)(she)(she)(she)(she)(she)(she)施(shi)(shi)(shi)遷改；③穿越方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)時(shi)的(de)(de)(de)(de)(de)(de)(de)技術要求(qiu)；④道(dao)(dao)(dao)(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)的(de)(de)(de)(de)(de)(de)(de)平面(mian)(mian)(mian)線(xian)(xian)(xian)位(wei)、縱(zong)(zong)(zong)斷(duan)(duan)設(she)(she)(she)(she)(she)(she)(she)(she)計(ji)(ji)高(gao)程(cheng)(cheng)、道(dao)(dao)(dao)(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)的(de)(de)(de)(de)(de)(de)(de)通(tong)(tong)(tong)行(xing)(xing)(xing)(xing)(xing)凈空(kong)(kong)(kong)(kong)(kong)及(ji)(ji)(ji)一(yi)(yi)(yi)(yi)般道(dao)(dao)(dao)(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)斷(duan)(duan)面(mian)(mian)(mian)布置(zhi)(zhi)(zhi)(zhi)(zhi)；⑤預留規(gui)劃道(dao)(dao)(dao)(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)后(hou)期(qi)改擴建空(kong)(kong)(kong)(kong)(kong)間(jian)；⑥市政設(she)(she)(she)(she)(she)(she)(she)(she)施(shi)(shi)(shi)穿越京(jing)(jing)廣(guang)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)的(de)(de)(de)(de)(de)(de)(de)安(an)全技術要求(qiu)；⑦道(dao)(dao)(dao)(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)的(de)(de)(de)(de)(de)(de)(de)規(gui)劃紅線(xian)(xian)(xian)；⑧立(li)交(jiao)(jiao)的(de)(de)(de)(de)(de)(de)(de)規(gui)模(mo)及(ji)(ji)(ji)投資(zi)。在(zai)道(dao)(dao)(dao)(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)與(yu)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)立(li)交(jiao)(jiao)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)程(cheng)(cheng)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)，首先考(kao)慮(lv)選(xuan)擇(ze)上(shang)(shang)跨(kua)或(huo)下(xia)(xia)(xia)穿方(fang)(fang)(fang)(fang)(fang)(fang)(fang)式，本(ben)項(xiang)目中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)根(gen)據(ju)規(gui)劃要求(qiu)，新建路(lu)(lu)(lu)(lu)(lu)(lu)(lu)要與(yu)東(dong)側(ce)(ce)薛(xue)店大道(dao)(dao)(dao)(dao)(dao)(dao)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)平交(jiao)(jiao)，從(cong)(cong)(cong)線(xian)(xian)(xian)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)縱(zong)(zong)(zong)斷(duan)(duan)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)面(mian)(mian)(mian)無法滿足(zu)規(gui)范(fan)(fan)要求(qiu)，故(gu)主(zhu)要從(cong)(cong)(cong)下(xia)(xia)(xia)穿方(fang)(fang)(fang)(fang)(fang)(fang)(fang)式進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)研究(jiu)。3.1設(she)(she)(she)(she)(she)(she)(she)(she)計(ji)(ji)荷(he)載(zai)(zai)。1）鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)列車(che)荷(he)載(zai)(zai)：采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)《鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)列車(che)活載(zai)(zai)圖(tu)》（TB/T3466-2016）中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)ZKH活載(zai)(zai)，荷(he)載(zai)(zai)圖(tu)式見圖(tu)1；2）道(dao)(dao)(dao)(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)荷(he)載(zai)(zai)：城(cheng)-A級3）恒載(zai)(zai)：靜(jing)土壓(ya)力(li)(li)、結(jie)(jie)構(gou)自重(zhong)(zhong)、附(fu)(fu)屬(shu)(shu)設(she)(she)(she)(she)(she)(she)(she)(she)備自重(zhong)(zhong)、混凝(ning)土收(shou)縮徐變以(yi)(yi)及(ji)(ji)(ji)溫度(du)(du)(du)影響4）其(qi)他：列車(che)沖擊力(li)(li)、制(zhi)動力(li)(li)以(yi)(yi)及(ji)(ji)(ji)活載(zai)(zai)土壓(ya)力(li)(li)3.2框(kuang)(kuang)(kuang)(kuang)構(gou)橋(qiao)主(zhu)體(ti)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)。擬(ni)建道(dao)(dao)(dao)(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)考(kao)慮(lv)非(fei)機(ji)(ji)動車(che)道(dao)(dao)(dao)(dao)(dao)(dao)以(yi)(yi)及(ji)(ji)(ji)人(ren)(ren)行(xing)(xing)(xing)(xing)(xing)道(dao)(dao)(dao)(dao)(dao)(dao)，框(kuang)(kuang)(kuang)(kuang)構(gou)橋(qiao)可(ke)(ke)考(kao)慮(lv)2孔(kong)16m+16m或(huo)3孔(kong)8m+16m+8m，從(cong)(cong)(cong)遠(yuan)期(qi)規(gui)劃看，2孔(kong)16m+16m更有(you)(you)(you)(you)(you)利于(yu)后(hou)期(qi)道(dao)(dao)(dao)(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)拓寬改造，推(tui)(tui)薦采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)兩(liang)(liang)(liang)(liang)孔(kong)結(jie)(jie)構(gou)；由于(yu)站(zhan)(zhan)場車(che)輛較多，有(you)(you)(you)(you)(you)可(ke)(ke)能(neng)(neng)會駐(zhu)停在(zai)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)范(fan)(fan)圍(wei)內，為(wei)(wei)(wei)(wei)了最(zui)大降低(di)(di)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)對(dui)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)站(zhan)(zhan)場的(de)(de)(de)(de)(de)(de)(de)風(feng)(feng)險(xian)，減少(shao)軌下(xia)(xia)(xia)暴露范(fan)(fan)圍(wei)，推(tui)(tui)薦采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)分(fen)(fen)幅(fu)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)法進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)頂(ding)(ding)(ding)(ding)進(jin)(jin)(jin)(jin)。框(kuang)(kuang)(kuang)(kuang)架(jia)(jia)橋(qiao)尺寸單(dan)孔(kong)凈寬16.0m，凈高(gao)6.7m，頂(ding)(ding)(ding)(ding)板(ban)(ban)(ban)(ban)厚(hou)1.1m，底(di)(di)板(ban)(ban)(ban)(ban)厚(hou)1.2m，邊(bian)(bian)墻(qiang)厚(hou)1.1m，頂(ding)(ding)(ding)(ding)板(ban)(ban)(ban)(ban)加(jia)腋1.5m×0.5m，底(di)(di)板(ban)(ban)(ban)(ban)加(jia)腋0.5m×0.5m，框(kuang)(kuang)(kuang)(kuang)架(jia)(jia)頂(ding)(ding)(ding)(ding)至(zhi)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)軌頂(ding)(ding)(ding)(ding)之(zhi)間(jian)距離(li)不(bu)(bu)小(xiao)于(yu)1.0m。3.3架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)選(xuan)擇(ze)。方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)一(yi)(yi)(yi)(yi)：縱(zong)(zong)(zong)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)。縱(zong)(zong)(zong)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)是平改立(li)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)程(cheng)(cheng)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)常(chang)用(yong)(yong)(yong)(yong)(yong)(yong)的(de)(de)(de)(de)(de)(de)(de)線(xian)(xian)(xian)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)，本(ben)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)100號工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)字鋼作(zuo)(zuo)(zuo)為(wei)(wei)(wei)(wei)邊(bian)(bian)縱(zong)(zong)(zong)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)，縱(zong)(zong)(zong)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)接(jie)(jie)長(chang)必(bi)須(xu)使用(yong)(yong)(yong)(yong)(yong)(yong)專用(yong)(yong)(yong)(yong)(yong)(yong)節點(dian)(dian)(dian)板(ban)(ban)(ban)(ban)及(ji)(ji)(ji)高(gao)強螺(luo)栓(shuan)可(ke)(ke)靠(kao)(kao)連(lian)接(jie)(jie)；橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)50c號工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)字鋼，間(jian)距不(bu)(bu)大于(yu)0.6m，橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)以(yi)(yi)最(zui)低(di)(di)處(chu)(chu)(chu)8道(dao)(dao)(dao)(dao)(dao)(dao)為(wei)(wei)(wei)(wei)基(ji)(ji)(ji)(ji)(ji)準，通(tong)(tong)(tong)穿所有(you)(you)(you)(you)(you)股(gu)道(dao)(dao)(dao)(dao)(dao)(dao)，橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)與(yu)鋼軌間(jian)必(bi)須(xu)可(ke)(ke)靠(kao)(kao)絕(jue)緣，橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)與(yu)縱(zong)(zong)(zong)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)使用(yong)(yong)(yong)(yong)(yong)(yong)U型螺(luo)栓(shuan)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)可(ke)(ke)靠(kao)(kao)連(lian)接(jie)(jie)，橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)與(yu)軌底(di)(di)之(zhi)間(jian)孔(kong)隙(xi)用(yong)(yong)(yong)(yong)(yong)(yong)枕(zhen)(zhen)木或(huo)墊(dian)塊填(tian)塞。為(wei)(wei)(wei)(wei)保(bao)(bao)證整體(ti)性(xing)，在(zai)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)間(jian)須(xu)布設(she)(she)(she)(she)(she)(she)(she)(she)枕(zhen)(zhen)木撐為(wei)(wei)(wei)(wei)保(bao)(bao)證線(xian)(xian)(xian)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)向(xiang)(xiang)穩(wen)定(ding)(ding)，在(zai)鋼軌外側(ce)(ce)與(yu)縱(zong)(zong)(zong)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)間(jian)每隔2m須(xu)設(she)(she)(she)(she)(she)(she)(she)(she)木支(zhi)(zhi)(zhi)撐。上(shang)(shang)部荷(he)載(zai)(zai)通(tong)(tong)(tong)過(guo)(guo)(guo)(guo)(guo)縱(zong)(zong)(zong)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)傳遞(di)到(dao)(dao)下(xia)(xia)(xia)部架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)支(zhi)(zhi)(zhi)點(dian)(dian)(dian)樁(zhuang)上(shang)(shang)，支(zhi)(zhi)(zhi)點(dian)(dian)(dian)樁(zhuang)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)直(zhi)徑(jing)1.5m的(de)(de)(de)(de)(de)(de)(de)人(ren)(ren)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)挖(wa)孔(kong)樁(zhuang)，縱(zong)(zong)(zong)向(xiang)(xiang)布設(she)(she)(she)(she)(she)(she)(she)(she)間(jian)距為(wei)(wei)(wei)(wei)8m，支(zhi)(zhi)(zhi)點(dian)(dian)(dian)處(chu)(chu)(chu)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)5片一(yi)(yi)(yi)(yi)組作(zuo)(zuo)(zuo)為(wei)(wei)(wei)(wei)抬(tai)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)，同時(shi)設(she)(she)(she)(she)(she)(she)(she)(she)置(zhi)(zhi)(zhi)(zhi)(zhi)抗(kang)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)移(yi)樁(zhuang)和(he)防(fang)護(hu)(hu)(hu)樁(zhuang)，抗(kang)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)移(yi)樁(zhuang)用(yong)(yong)(yong)(yong)(yong)(yong)來(lai)(lai)抵抗(kang)頂(ding)(ding)(ding)(ding)進(jin)(jin)(jin)(jin)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)的(de)(de)(de)(de)(de)(de)(de)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)向(xiang)(xiang)力(li)(li)，防(fang)護(hu)(hu)(hu)樁(zhuang)是為(wei)(wei)(wei)(wei)了保(bao)(bao)證框(kuang)(kuang)(kuang)(kuang)架(jia)(jia)結(jie)(jie)構(gou)頂(ding)(ding)(ding)(ding)進(jin)(jin)(jin)(jin)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)，防(fang)止線(xian)(xian)(xian)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)基(ji)(ji)(ji)(ji)(ji)土體(ti)坍塌(ta)，保(bao)(bao)證鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)基(ji)(ji)(ji)(ji)(ji)安(an)全，防(fang)護(hu)(hu)(hu)樁(zhuang)設(she)(she)(she)(she)(she)(she)(she)(she)置(zhi)(zhi)(zhi)(zhi)(zhi)在(zai)框(kuang)(kuang)(kuang)(kuang)架(jia)(jia)結(jie)(jie)構(gou)四(si)(si)(si)角處(chu)(chu)(chu)。本(ben)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)所需(xu)挖(wa)孔(kong)支(zhi)(zhi)(zhi)點(dian)(dian)(dian)樁(zhuang)較多，頂(ding)(ding)(ding)(ding)進(jin)(jin)(jin)(jin)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)需(xu)要進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)多次(ci)(ci)支(zhi)(zhi)(zhi)點(dian)(dian)(dian)轉(zhuan)換(huan)，工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)藝復雜，施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)要點(dian)(dian)(dian)多，且京(jing)(jing)廣(guang)線(xian)(xian)(xian)處(chu)(chu)(chu)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)上(shang)(shang)墊(dian)設(she)(she)(she)(she)(she)(she)(she)(she)高(gao)度(du)(du)(du)達63cm的(de)(de)(de)(de)(de)(de)(de)墊(dian)塊，再加(jia)上(shang)(shang)絕(jue)緣橡膠板(ban)(ban)(ban)(ban)，墊(dian)設(she)(she)(she)(she)(she)(she)(she)(she)高(gao)度(du)(du)(du)至(zhi)少(shao)達65cm，行(xing)(xing)(xing)(xing)(xing)車(che)安(an)全有(you)(you)(you)(you)(you)隱患，不(bu)(bu)推(tui)(tui)薦采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)。方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)二(er)(er)：橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)搭(da)接(jie)(jie)法。本(ben)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)是在(zai)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)一(yi)(yi)(yi)(yi)基(ji)(ji)(ji)(ji)(ji)礎上(shang)(shang)變化而(er)成(cheng)，其(qi)內容基(ji)(ji)(ji)(ji)(ji)本(ben)相同，區別(bie)在(zai)于(yu)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)分(fen)(fen)兩(liang)(liang)(liang)(liang)部分(fen)(fen)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)穿所有(you)(you)(you)(you)(you)股(gu)道(dao)(dao)(dao)(dao)(dao)(dao)，從(cong)(cong)(cong)各股(gu)道(dao)(dao)(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)(de)(de)標高(gao)看，兩(liang)(liang)(liang)(liang)部分(fen)(fen)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)搭(da)接(jie)(jie)位(wei)置(zhi)(zhi)(zhi)(zhi)(zhi)只(zhi)能(neng)(neng)位(wei)于(yu)京(jing)(jing)廣(guang)上(shang)(shang)行(xing)(xing)(xing)(xing)(xing)線(xian)(xian)(xian)處(chu)(chu)(chu)才能(neng)(neng)有(you)(you)(you)(you)(you)效降低(di)(di)軌道(dao)(dao)(dao)(dao)(dao)(dao)高(gao)差，將(jiang)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)1從(cong)(cong)(cong)西(xi)(xi)向(xiang)(xiang)東(dong)開始(shi)穿越8道(dao)(dao)(dao)(dao)(dao)(dao)、6道(dao)(dao)(dao)(dao)(dao)(dao)、4道(dao)(dao)(dao)(dao)(dao)(dao)到(dao)(dao)達京(jing)(jing)廣(guang)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)上(shang)(shang)行(xing)(xing)(xing)(xing)(xing)線(xian)(xian)(xian)下(xia)(xia)(xia)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)，橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)2從(cong)(cong)(cong)東(dong)向(xiang)(xiang)西(xi)(xi)穿越京(jing)(jing)廣(guang)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)上(shang)(shang)下(xia)(xia)(xia)行(xing)(xing)(xing)(xing)(xing)和(he)3道(dao)(dao)(dao)(dao)(dao)(dao)，并在(zai)京(jing)(jing)廣(guang)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)上(shang)(shang)行(xing)(xing)(xing)(xing)(xing)線(xian)(xian)(xian)下(xia)(xia)(xia)落在(zai)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)抬(tai)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)1上(shang)(shang)，如圖(tu)2所示：由于(yu)東(dong)側(ce)(ce)股(gu)道(dao)(dao)(dao)(dao)(dao)(dao)以(yi)(yi)3道(dao)(dao)(dao)(dao)(dao)(dao)標高(gao)最(zui)低(di)(di)，橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)二(er)(er)穿越時(shi)需(xu)要以(yi)(yi)3道(dao)(dao)(dao)(dao)(dao)(dao)為(wei)(wei)(wei)(wei)基(ji)(ji)(ji)(ji)(ji)準，橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)一(yi)(yi)(yi)(yi)定(ding)(ding)位(wei)標高(gao)比(bi)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)二(er)(er)低(di)(di)一(yi)(yi)(yi)(yi)個橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)高(gao)度(du)(du)(du)，即50cm，兩(liang)(liang)(liang)(liang)部分(fen)(fen)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)搭(da)接(jie)(jie)部分(fen)(fen)用(yong)(yong)(yong)(yong)(yong)(yong)U型螺(luo)栓(shuan)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)連(lian)接(jie)(jie)。軌道(dao)(dao)(dao)(dao)(dao)(dao)與(yu)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)之(zhi)間(jian)的(de)(de)(de)(de)(de)(de)(de)孔(kong)隙(xi)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)枕(zhen)(zhen)木進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)墊(dian)設(she)(she)(she)(she)(she)(she)(she)(she)，橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)一(yi)(yi)(yi)(yi)上(shang)(shang)最(zui)大墊(dian)設(she)(she)(she)(she)(she)(she)(she)(she)高(gao)為(wei)(wei)(wei)(wei)25cm,橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)二(er)(er)上(shang)(shang)最(zui)大墊(dian)設(she)(she)(she)(she)(she)(she)(she)(she)高(gao)為(wei)(wei)(wei)(wei)26cm，遠(yuan)低(di)(di)于(yu)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)一(yi)(yi)(yi)(yi)的(de)(de)(de)(de)(de)(de)(de)墊(dian)設(she)(she)(she)(she)(she)(she)(she)(she)高(gao)度(du)(du)(du)。但本(ben)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)在(zai)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)實(shi)施(shi)(shi)(shi)時(shi)比(bi)較困難，橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)一(yi)(yi)(yi)(yi)有(you)(you)(you)(you)(you)部分(fen)(fen)處(chu)(chu)(chu)于(yu)懸(xuan)臂狀態，兩(liang)(liang)(liang)(liang)處(chu)(chu)(chu)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)通(tong)(tong)(tong)過(guo)(guo)(guo)(guo)(guo)螺(luo)栓(shuan)鉸(jiao)接(jie)(jie)在(zai)一(yi)(yi)(yi)(yi)起(qi)，頂(ding)(ding)(ding)(ding)進(jin)(jin)(jin)(jin)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)不(bu)(bu)利于(yu)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)向(xiang)(xiang)力(li)(li)向(xiang)(xiang)抗(kang)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)移(yi)樁(zhuang)傳遞(di)，易使橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)間(jian)產生相對(dui)位(wei)移(yi)，且搭(da)接(jie)(jie)位(wei)置(zhi)(zhi)(zhi)(zhi)(zhi)位(wei)于(yu)國家干線(xian)(xian)(xian)京(jing)(jing)廣(guang)線(xian)(xian)(xian)處(chu)(chu)(chu)，對(dui)行(xing)(xing)(xing)(xing)(xing)車(che)穩(wen)定(ding)(ding)有(you)(you)(you)(you)(you)影響，不(bu)(bu)推(tui)(tui)薦采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)。方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)三(san)：D型便梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)。常(chang)用(yong)(yong)(yong)(yong)(yong)(yong)的(de)(de)(de)(de)(de)(de)(de)D型便梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)有(you)(you)(you)(you)(you)D12、D16、D20和(he)D24四(si)(si)(si)種(zhong)(zhong)類型，跨(kua)度(du)(du)(du)分(fen)(fen)別(bie)為(wei)(wei)(wei)(wei)Lp=12.06m、16.08m、20.1m、24.12m，長(chang)度(du)(du)(du)分(fen)(fen)別(bie)為(wei)(wei)(wei)(wei)12.4m、16.4m、20.48m、24.5m。便梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)的(de)(de)(de)(de)(de)(de)(de)最(zui)大優點(dian)(dian)(dian)是在(zai)不(bu)(bu)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)斷(duan)(duan)行(xing)(xing)(xing)(xing)(xing)車(che)的(de)(de)(de)(de)(de)(de)(de)情況下(xia)(xia)(xia)，利用(yong)(yong)(yong)(yong)(yong)(yong)它進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)橋(qiao)涵的(de)(de)(de)(de)(de)(de)(de)開挖(wa)和(he)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)，并且具有(you)(you)(you)(you)(you)運輸和(he)拆(chai)裝方(fang)(fang)(fang)(fang)(fang)(fang)(fang)便的(de)(de)(de)(de)(de)(de)(de)特點(dian)(dian)(dian)，本(ben)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)D24和(he)D12兩(liang)(liang)(liang)(liang)種(zhong)(zhong)邊(bian)(bian)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)對(dui)各股(gu)道(dao)(dao)(dao)(dao)(dao)(dao)單(dan)獨進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)。由于(yu)分(fen)(fen)幅(fu)頂(ding)(ding)(ding)(ding)進(jin)(jin)(jin)(jin)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)，便梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)需(xu)要轉(zhuan)換(huan)，故(gu)整個施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)需(xu)要兩(liang)(liang)(liang)(liang)次(ci)(ci)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)，架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)支(zhi)(zhi)(zhi)點(dian)(dian)(dian)樁(zhuang)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)直(zhi)徑(jing)1.8m的(de)(de)(de)(de)(de)(de)(de)人(ren)(ren)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)挖(wa)孔(kong)樁(zhuang)，挖(wa)孔(kong)樁(zhuang)護(hu)(hu)(hu)壁(bi)厚(hou)度(du)(du)(du)為(wei)(wei)(wei)(wei)15cm，同時(shi)在(zai)3道(dao)(dao)(dao)(dao)(dao)(dao)和(he)8道(dao)(dao)(dao)(dao)(dao)(dao)安(an)裝護(hu)(hu)(hu)軌，在(zai)框(kuang)(kuang)(kuang)(kuang)架(jia)(jia)橋(qiao)就位(wei)處(chu)(chu)(chu)的(de)(de)(de)(de)(de)(de)(de)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)基(ji)(ji)(ji)(ji)(ji)過(guo)(guo)(guo)(guo)(guo)渡(du)處(chu)(chu)(chu)設(she)(she)(she)(she)(she)(she)(she)(she)置(zhi)(zhi)(zhi)(zhi)(zhi)直(zhi)徑(jing)1.25m的(de)(de)(de)(de)(de)(de)(de)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)基(ji)(ji)(ji)(ji)(ji)防(fang)護(hu)(hu)(hu)樁(zhuang)；由于(yu)線(xian)(xian)(xian)間(jian)距原(yuan)因，部分(fen)(fen)線(xian)(xian)(xian)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)間(jian)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)向(xiang)(xiang)只(zhi)能(neng)(neng)布設(she)(she)(she)(she)(she)(she)(she)(she)單(dan)個支(zhi)(zhi)(zhi)點(dian)(dian)(dian)樁(zhuang)，這就導(dao)致(zhi)部分(fen)(fen)支(zhi)(zhi)(zhi)點(dian)(dian)(dian)樁(zhuang)必(bi)須(xu)共用(yong)(yong)(yong)(yong)(yong)(yong)，承(cheng)擔橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)向(xiang)(xiang)兩(liang)(liang)(liang)(liang)片施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)便梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)傳遞(di)的(de)(de)(de)(de)(de)(de)(de)荷(he)載(zai)(zai)。第(di)(di)一(yi)(yi)(yi)(yi)次(ci)(ci)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)設(she)(she)(she)(she)(she)(she)(she)(she)計(ji)(ji)分(fen)(fen)別(bie)見圖(tu)3、圖(tu)4：從(cong)(cong)(cong)上(shang)(shang)圖(tu)可(ke)(ke)以(yi)(yi)看出(chu)，整個架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)共布設(she)(she)(she)(she)(she)(she)(she)(she)48個受力(li)(li)支(zhi)(zhi)(zhi)點(dian)(dian)(dian)，其(qi)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)40個人(ren)(ren)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)挖(wa)孔(kong)樁(zhuang)，8個硬支(zhi)(zhi)(zhi)點(dian)(dian)(dian)，通(tong)(tong)(tong)過(guo)(guo)(guo)(guo)(guo)計(ji)(ji)算，樁(zhuang)長(chang)分(fen)(fen)別(bie)有(you)(you)(you)(you)(you)18m、15m、8m、5m四(si)(si)(si)種(zhong)(zhong)。。第(di)(di)一(yi)(yi)(yi)(yi)次(ci)(ci)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)D12+D24+D24三(san)跨(kua)組合(he)(he)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)，在(zai)下(xia)(xia)(xia)部用(yong)(yong)(yong)(yong)(yong)(yong)機(ji)(ji)械(xie)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)橋(qiao)涵開挖(wa)，用(yong)(yong)(yong)(yong)(yong)(yong)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)繼頂(ding)(ding)(ding)(ding)將(jiang)北側(ce)(ce)框(kuang)(kuang)(kuang)(kuang)架(jia)(jia)頂(ding)(ding)(ding)(ding)進(jin)(jin)(jin)(jin)到(dao)(dao)位(wei)。北側(ce)(ce)框(kuang)(kuang)(kuang)(kuang)架(jia)(jia)頂(ding)(ding)(ding)(ding)進(jin)(jin)(jin)(jin)后(hou)，完成(cheng)回填(tian)道(dao)(dao)(dao)(dao)(dao)(dao)碴及(ji)(ji)(ji)恢復線(xian)(xian)(xian)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)作(zuo)(zuo)(zuo)業，人(ren)(ren)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)拆(chai)除牛(niu)腿扣件螺(luo)栓(shuan)，使鋼枕(zhen)(zhen)與(yu)縱(zong)(zong)(zong)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)分(fen)(fen)離(li)，通(tong)(tong)(tong)過(guo)(guo)(guo)(guo)(guo)縱(zong)(zong)(zong)移(yi)架(jia)(jia)設(she)(she)(she)(she)(she)(she)(she)(she)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)式將(jiang)D梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)縱(zong)(zong)(zong)移(yi)到(dao)(dao)位(wei)，開始(shi)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)第(di)(di)二(er)(er)次(ci)(ci)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)，圖(tu)5為(wei)(wei)(wei)(wei)第(di)(di)二(er)(er)次(ci)(ci)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)斷(duan)(duan)面(mian)(mian)(mian)示意：圖(tu)5第(di)(di)二(er)(er)次(ci)(ci)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)斷(duan)(duan)面(mian)(mian)(mian)圖(tu)第(di)(di)二(er)(er)次(ci)(ci)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)D24+D12兩(liang)(liang)(liang)(liang)跨(kua)組合(he)(he)，從(cong)(cong)(cong)圖(tu)上(shang)(shang)可(ke)(ke)以(yi)(yi)看出(chu)，D24便梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)一(yi)(yi)(yi)(yi)端(duan)落在(zai)第(di)(di)四(si)(si)(si)排(pai)(pai)支(zhi)(zhi)(zhi)點(dian)(dian)(dian)樁(zhuang)上(shang)(shang)，另一(yi)(yi)(yi)(yi)端(duan)落在(zai)已頂(ding)(ding)(ding)(ding)進(jin)(jin)(jin)(jin)的(de)(de)(de)(de)(de)(de)(de)框(kuang)(kuang)(kuang)(kuang)架(jia)(jia)邊(bian)(bian)墻(qiang)上(shang)(shang)，邊(bian)(bian)墻(qiang)上(shang)(shang)墊(dian)設(she)(she)(she)(she)(she)(she)(she)(she)枕(zhen)(zhen)木垛來(lai)(lai)調節控制(zhi)縱(zong)(zong)(zong)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)高(gao)度(du)(du)(du)，在(zai)D梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)架(jia)(jia)設(she)(she)(she)(she)(she)(she)(she)(she)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)，第(di)(di)四(si)(si)(si)排(pai)(pai)支(zhi)(zhi)(zhi)點(dian)(dian)(dian)樁(zhuang)在(zai)兩(liang)(liang)(liang)(liang)次(ci)(ci)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)得到(dao)(dao)了重(zhong)(zhong)復利用(yong)(yong)(yong)(yong)(yong)(yong)。在(zai)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)下(xia)(xia)(xia)部用(yong)(yong)(yong)(yong)(yong)(yong)機(ji)(ji)械(xie)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)橋(qiao)涵開挖(wa)，并鑿除第(di)(di)三(san)排(pai)(pai)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)支(zhi)(zhi)(zhi)點(dian)(dian)(dian)樁(zhuang)，用(yong)(yong)(yong)(yong)(yong)(yong)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)繼頂(ding)(ding)(ding)(ding)將(jiang)南側(ce)(ce)框(kuang)(kuang)(kuang)(kuang)架(jia)(jia)頂(ding)(ding)(ding)(ding)進(jin)(jin)(jin)(jin)到(dao)(dao)設(she)(she)(she)(she)(she)(she)(she)(she)計(ji)(ji)位(wei)置(zhi)(zhi)(zhi)(zhi)(zhi)。本(ben)方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)藝清(qing)晰，施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)簡便，支(zhi)(zhi)(zhi)點(dian)(dian)(dian)樁(zhuang)數(shu)(shu)量較少(shao)，且不(bu)(bu)需(xu)要設(she)(she)(she)(she)(she)(she)(she)(she)置(zhi)(zhi)(zhi)(zhi)(zhi)抗(kang)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)移(yi)樁(zhuang)，頂(ding)(ding)(ding)(ding)進(jin)(jin)(jin)(jin)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)不(bu)(bu)需(xu)要進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)支(zhi)(zhi)(zhi)點(dian)(dian)(dian)轉(zhuan)換(huan)，施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)速度(du)(du)(du)快，能(neng)(neng)明顯減少(shao)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)期(qi)和(he)要點(dian)(dian)(dian)數(shu)(shu)，軌道(dao)(dao)(dao)(dao)(dao)(dao)高(gao)差通(tong)(tong)(tong)過(guo)(guo)(guo)(guo)(guo)階(jie)梯(ti)承(cheng)臺有(you)(you)(you)(you)(you)效地得到(dao)(dao)解決，使站(zhan)(zhan)場列車(che)安(an)全穩(wen)定(ding)(ding)性(xing)得能(neng)(neng)到(dao)(dao)較好的(de)(de)(de)(de)(de)(de)(de)保(bao)(bao)障。推(tui)(tui)薦采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)此方(fang)(fang)(fang)(fang)(fang)(fang)(fang)案(an)(an)(an)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)線(xian)(xian)(xian)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)架(jia)(jia)空(kong)(kong)(kong)(kong)(kong)加(jia)固。3.4工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)(zuo)坑(keng)(keng)設(she)(she)(she)(she)(she)(she)(she)(she)計(ji)(ji)。工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)(zuo)坑(keng)(keng)主(zhu)要包括(kuo)基(ji)(ji)(ji)(ji)(ji)坑(keng)(keng)、后(hou)背(bei)(bei)及(ji)(ji)(ji)滑(hua)板(ban)(ban)(ban)(ban)系統(tong)。根(gen)據(ju)場地條(tiao)件，預制(zhi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)作(zuo)(zuo)(zuo)坑(keng)(keng)深為(wei)(wei)(wei)(wei)10m,設(she)(she)(she)(she)(she)(she)(she)(she)置(zhi)(zhi)(zhi)(zhi)(zhi)在(zai)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)西(xi)(xi)側(ce)(ce)。兩(liang)(liang)(liang)(liang)側(ce)(ce)邊(bian)(bian)坡(po)坡(po)度(du)(du)(du)按照1:1設(she)(she)(she)(she)(she)(she)(she)(she)計(ji)(ji)，臨近(jin)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)側(ce)(ce)坡(po)度(du)(du)(du)1:1.5，5m高(gao)度(du)(du)(du)處(chu)(chu)(chu)設(she)(she)(she)(she)(she)(she)(she)(she)1m寬的(de)(de)(de)(de)(de)(de)(de)平臺；基(ji)(ji)(ji)(ji)(ji)坑(keng)(keng)邊(bian)(bian)坡(po)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)掛鋼筋(jin)網(wang)噴(pen)射混凝(ning)土方(fang)(fang)(fang)(fang)(fang)(fang)(fang)式防(fang)護(hu)(hu)(hu)，鋼筋(jin)網(wang)規(gui)格為(wei)(wei)(wei)(wei)15cm×15cm的(de)(de)(de)(de)(de)(de)(de)φ10鋼筋(jin)網(wang)片，噴(pen)射混凝(ning)土強度(du)(du)(du)等級為(wei)(wei)(wei)(wei)C20，厚(hou)10cm；基(ji)(ji)(ji)(ji)(ji)坑(keng)(keng)坡(po)頂(ding)(ding)(ding)(ding)四(si)(si)(si)周設(she)(she)(she)(she)(she)(she)(she)(she)置(zhi)(zhi)(zhi)(zhi)(zhi)截水(shui)溝，坑(keng)(keng)底(di)(di)順道(dao)(dao)(dao)(dao)(dao)(dao)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)兩(liang)(liang)(liang)(liang)側(ce)(ce)設(she)(she)(she)(she)(she)(she)(she)(she)置(zhi)(zhi)(zhi)(zhi)(zhi)有(you)(you)(you)(you)(you)集水(shui)井和(he)排(pai)(pai)水(shui)溝，坡(po)面(mian)(mian)(mian)埋設(she)(she)(she)(she)(she)(she)(she)(she)φ10cm泄水(shui)孔(kong)。后(hou)背(bei)(bei)形(xing)式主(zhu)要有(you)(you)(you)(you)(you)重(zhong)(zhong)力(li)(li)式、板(ban)(ban)(ban)(ban)樁(zhuang)式和(he)鋼筋(jin)混凝(ning)土拼裝式后(hou)背(bei)(bei)，根(gen)據(ju)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)計(ji)(ji)劃，施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)時(shi)先進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)鐵(tie)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)節點(dian)(dian)(dian)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)。滑(hua)板(ban)(ban)(ban)(ban)系統(tong)應(ying)有(you)(you)(you)(you)(you)足(zu)夠的(de)(de)(de)(de)(de)(de)(de)剛度(du)(du)(du)和(he)強度(du)(du)(du)，以(yi)(yi)保(bao)(bao)證框(kuang)(kuang)(kuang)(kuang)架(jia)(jia)橋(qiao)結(jie)(jie)構(gou)在(zai)預制(zhi)和(he)頂(ding)(ding)(ding)(ding)進(jin)(jin)(jin)(jin)中(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)的(de)(de)(de)(de)(de)(de)(de)順利進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)，滑(hua)板(ban)(ban)(ban)(ban)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)(yong)C30鋼筋(jin)混凝(ning)土，厚(hou)度(du)(du)(du)20cm，在(zai)滑(hua)板(ban)(ban)(ban)(ban)下(xia)(xia)(xia)設(she)(she)(she)(she)(she)(she)(she)(she)置(zhi)(zhi)(zhi)(zhi)(zhi)縱(zong)(zong)(zong)橫(heng)(heng)(heng)(heng)(heng)(heng)(heng)(heng)向(xiang)(xiang)的(de)(de)(de)(de)(de)(de)(de)錨梁(liang)(liang)(liang)(liang)(liang)(liang)(liang)(liang)，并在(zai)滑(hua)板(ban)(ban)(ban)(ban)下(xia)(xia)(xia)鋪(pu)設(she)(she)(she)(she)(she)(she)(she)(she)10cm的(de)(de)(de)(de)(de)(de)(de)碎石墊(dian)層。3.5其(qi)他附(fu)(fu)屬(shu)(shu)設(she)(she)(she)(she)(she)(she)(she)(she)計(ji)(ji)由于(yu)本(ben)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)程(cheng)(cheng)水(shui)位(wei)較深，不(bu)(bu)必(bi)考(kao)慮(lv)路(lu)(lu)(lu)(lu)(lu)(lu)(lu)基(ji)(ji)(ji)(ji)(ji)浸泡(pao)及(ji)(ji)(ji)抗(kang)浮風(feng)(feng)險(xian)，所以(yi)(yi)只(zhi)需(xu)設(she)(she)(she)(she)(she)(she)(she)(she)置(zhi)(zhi)(zhi)(zhi)(zhi)擋(dang)墻(qiang)即可(ke)(ke)，類型原(yuan)則為(wei)(wei)(wei)(wei)6～10m為(wei)(wei)(wei)(wei)扶壁(bi)式擋(dang)墻(qiang)，2～6m為(wei)(wei)(wei)(wei)懸(xuan)臂式擋(dang)墻(qiang)，2m以(yi)(yi)下(xia)(xia)(xia)為(wei)(wei)(wei)(wei)重(zhong)(zhong)力(li)(li)式擋(dang)墻(qiang)，其(qi)他附(fu)(fu)屬(shu)(shu)可(ke)(ke)在(zai)下(xia)(xia)(xia)階(jie)段根(gen)據(ju)具體(ti)情況選(xuan)擇(ze)設(she)(she)(she)(she)(she)(she)(she)(she)置(zhi)(zhi)(zhi)(zhi)(zhi)。

4結論

本文對友誼路穿越(yue)薛店站場鐵(tie)路工程方案優劣(lie)性進行了對比，所推薦方案得(de)(de)到(dao)(dao)了鐵(tie)路局相(xiang)關專家及站段領導的(de)認可，順利(li)通過(guo)(guo)了評(ping)審，得(de)(de)出以(yi)下幾點(dian)(dian)結(jie)論：1）對具有高差的(de)多股道(dao)線(xian)路，在線(xian)路架空(kong)設計中，結(jie)合項(xiang)目特點(dian)(dian)，可通過(guo)(guo)在樁頂設置階梯承臺(tai)來有效解決軌道(dao)之(zhi)間的(de)高差問題，增加列車的(de)穩定(ding)性。2）在架空(kong)范圍內(nei)通過(guo)(guo)合理的(de)平(ping)面布置，使部分架空(kong)支點(dian)(dian)樁得(de)(de)到(dao)(dao)二(er)次(ci)利(li)用(yong)，能(neng)提(ti)(ti)高施(shi)工效率，降(jiang)低工程成本。3）根據施(shi)工計劃及周邊(bian)條(tiao)件，合理選擇工作坑后背形式(shi)，最大(da)限度(du)利(li)用(yong)天然條(tiao)件提(ti)(ti)供頂進的(de)反(fan)力(li)，實現優化(hua)設計。