pilot tunnel method 中文意思是什麼
pilot tunnel method
解釋
導洞法-
The tunneling method for the landslide section at the entrance of heishuigou tunnel ( for the internal circle construction road in the construction site of guandi hydropower station ) is presented herein ; in which the tunneling method and the effects of both the pilot and the system supportings on the entrance tunneling into the landslide body are described as well
摘要介紹了官地水電站場內環線道路黑水河溝隧道進口滑坡體的施工方法，包括開挖的施工方法以及超前與系統支護對在滑坡體上進洞所發揮的作用。 -
Construction of flat tunnel of large span at extra - shallow depth must be conducted on the principle that advance grouting should be strictly performed before excavation and length of pull at one time should be short, together with reinforced support, immediate closing and constant monitoring and surveying. that preceding pilot tunnels, large - volume excavation divided into small ones, excavation of flank before that of center, upper before lower, arch before wall etc is a good method which could effectively reduce surface subsidence and its adverse effect on adjacent buildings, in addition, some other measures are also taken to lessen blast - induced vibration in the ground and surrounding structures. in a word, all means and steps mentioned above have already proved effective and practicable in practice
軟弱大跨超淺埋扁平隧道必須按「管超前，嚴注漿，多分部、短開挖、強支護、快封閉，勤量測」的施工原則進行施工，採用「眼鏡超前，化大為小，先側后中，先上後下，先拱后墻」的施工方法控制地表沉降和對周邊建築物的影響；採用「多分部，化大為小，短進尺，密布眼，弱裝藥，設減振槽」 ，控制爆破振動，經過實踐證明，這些方法都是行之有效的。
分享友人