土体含水率对黄土隧道施工过程稳定性的影响  

Influence of Soil Moisture Content on the Stability of Loess Tunnel in the Process of Construction

作　　者：周康祥 骆维斌 Zhou Kangxiang;Luo Weibin(Gansu Highway Construction Group Co.,Ltd.,Lanzhou,730050;Gansu Tunnel Engineering Technology Research Center,Lanzhou,730050)

机构地区：[1]甘肃省公路交通建设集团有限公司,兰州730050 [2]甘肃省隧道工程技术研究中心,兰州730050

出　　处：《建设科技》2020年第16期94-96,共3页Construction Science and Technology

摘　　要：第四系黄土隧道因围岩整体性较差,在开挖施工过程中往往容易造成掉块、塌方等现象。本文通过对黄土隧道土体含水率与围岩稳定性的关系进行研究,得出土体含水率在10%-11.6%时开挖后围岩最稳定、变形量最小这一结论,可通过隧道开挖施工过程中快速检测含水率及时调整循环进尺和预留变形量,从而加快施工进度和节约施工成本。Because of the poor integrity of the surrounding rock in the Quaternary loess tunnel,it is easy to cause the phenomenon of falling block and collapse in the process of excavation and construction.This paper studies the relationship between the soil moisture content of the loess tunnel and the stability of the surrounding rock,and reaches the conclusion that the surrounding rock is most stable with the minimum deformation when the soil moisture content is 10%-11.6%.The water content can be quickly detected in the process of tunnel excavation and construction so as to adjust the cyclic footage and reserve deformation in time,which can speed up the construction progress and save the construction cost.

关 键 词：黄土隧道 含水率 稳定性 关系 施工 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]