摘要
针对新白广下穿白云国际机场暗挖隧道的特殊地质情况,对复杂环境下暗挖隧道穿越富水砂层的地表沉降进行了研究。结果表明在一定程度上增强支护结构强度能对围岩刚度抑制地层变形进行很好的弥补。对隧道采用超前全(半)断面注浆可大幅减少地表沉降。对于双线暗挖隧道,地表沉降呈现"双凹槽形",先行开挖将对后续开挖的地表沉降造成影响。
In view of the special geological conditions of the tunnel under Xinbaiguang Baiyun International Airport,the surface settlement of the tunnel under the complex environment is studied.The results show that to a certain extent,the strength of the support structure can make up for the stiffness of the surrounding rock to restrain the formation deformation.The surface settlement can be greatly reduced by adopting full(half)section grouting in advance.For the double line tunnel,the surface settlement presents"double concave type".The first excavation will affect the surface settlement of the subsequent excavation.
出处
《建筑技术开发》
2020年第12期120-122,共3页
Building Technology Development
关键词
暗挖隧道
加强支护
地表沉降
underground tunnel
strengthening support
surface settlement
作者简介
裴秀安(1966—),男,河北滦县人,高级工程师,主要研究方向为桥梁隧道工程。
