1) Excavation with advance bottom heading
下导洞超前法
2) bottom heading method
下部导洞法
1.
,bottom heading method,is recommended,which can not only completely solve the problem of primary support settlement and convergence,but also can guarantee the construction safety,improve the construction speed and construction quality and reduce the construction cost.
一种新的施工方法——下部导洞法,不仅可以从根本上解决初期支护下沉和收敛问题,而且施工安全、施工速度快、有利于提高初期支护的施工质量,并且可以明显的降低工程造价。
3) bottom drift with upper annular benching method
下导坑超前台阶法
4) "pilot and enlarging" excavation method
导洞超前扩挖
5) drilling hole in advance
超前探孔(洞)
6) guiding hole method
导洞法
1.
In this article,transitional section is formed by vertical and horizontal guiding hole method during construction of No.
介绍北京地铁五号线区间利用纵-横导洞法形成渡线大断面,并在管线渗漏水严重、围岩极差的情况下,采用地面防护与地下辅助工法相结合的施工技术,确保了危楼、管线及暗挖结构的安全。
补充资料：下部
下部
解剖名。出汉·张仲景《金匮· 百合狐■阴阳毒病脉证并治》，特指前后二阴。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
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