复杂地层深埋隧道地表塌陷处置对策  

Disposal Countermeasures of Surface Subsidence of Deep Tunnel in Complex Stratum

作　　者：武明静 Wu Mingjing(The Second Engineering of China Railway 12th Bureau Group Co., Ltd., Taiyuan Shanxi 030032)

机构地区：[1]中铁十二局集团第二工程有限公司,山西太原030032

出　　处：《现代工业经济和信息化》2017年第11期42-45,共4页Modern Industrial Economy and Informationization

摘　　要：在工程背景资料及现场调查的基础上,分析复杂地层中总干3号隧洞开挖面失稳造成地表塌陷的原因,得到结论:隧洞顶部位于第三层卵石混合层中,第三层卵石混合层级配不良且该层有地下水的存在是引起地表塌陷的主要原因。最后,制定了相对应的处置对策:建议对下部砂卵石层采用地表花管注浆的方式加固;对低液限粘土层采用高压旋喷桩注浆的方式加固;并对路面、标线、防撞护栏、边坡防护等相关工程进行修复。Based on engineering background data and on-site survey, this paper analyzes the reasons of surface subsidence caused by instability of No.3 tunnel excavation in complex strata. It is concluded that the main reason for surface collapse is that the tunnel is located in the third gravel mixed layer, which is poorly graded and there is ground water in this layer. Finally, corresponding countermeasures are formulated. The surface pipe grouting is adopted to reinforce the lower gravel layer. Jet grouting pile grouting with high pressure is adopted to reinforce the clay layer with low liquid limit. And the road, marking, anticollision guardrail, slope protection and other related engineering are repaired.

关 键 词：地表塌陷 卵石层 低液限粘土层 修复 

分 类 号：U455[建筑科学—桥梁与隧道工程]