1) 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。
2) Excavation with advance bottom heading
下导洞超前法
3) 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。
4) three-pilot drift method
三导洞法
1.
By means of numerical analysis, the construction process of three-pilot drift method and single-pilot drift method on geology condition of four-grade and five-grade rock mass was discussed.
应用数值分析手段，探讨了Ⅳ、Ⅴ级围岩条件下三导洞法和中导洞法施工过程中，围岩应力场和位移场的分布特征及支护结构的内力演变规律。
5) two-guiding-hole method
中导洞法
1.
According to the result,the three-guiding-hole method is more suitable for this construction because their wall-rock displacement and vertical stress are smaller and the prejudicial stress of the middle wall is lower than the two-guiding-hole method.
以张石高速公路二期工程岔道一号隧道为实例,对三导洞法和中导洞法两种施工方法进行了数值模拟,分析比较了这两种施工方法在不同施工工序下的围岩位移场、围岩竖向应力场以及中隔墙竖向应力的变化,从而得出了在相同支护条件下,采用三导洞方案进行岔道一号双连拱隧道施工时,与中导洞方案相比围岩位移值小,竖向应力和中墙所受偏压力低,因而优于中导洞方案。
6) lower carriage,lower guide rail
下部导轨
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。
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