摘要
景海高速公路宾房2;隧道洞室围岩主要为中风化花岗岩,顶板为全—强风化花岗岩,具有浅埋、富水、自稳能力极差、遇水流塑性强、施工扰动作用下围岩液化现象明显等特点。该文从地质、施工、自然等多方面对隧道塌方进行分析,并提出一套隧道塌方综合治理措施。采用FLAC3D对治理地表注浆段进行了数值模拟,通过计算结果和现场K31+565、K31+555断面拱顶沉降监测数据,证实本次隧道塌方治理效果显著,为今后类似的隧道塌方治理提供了参考。
The surrounding rock of Binfang 2;Tunnel cavern of Jinghai Expressway is mainly moderately weathered granite,and the roof is fully—strongly weathered granite,which has the characteristics of shallow burial,rich water,very poor self stabilization ability,strong plasticity in case of water,and obvious surrounding rock liquefaction under construction disturbance.This paper analyzes the tunnel collapse from the aspects of geology,construction and nature,and puts forward a set of comprehensive treatment measures for tunnel collapse.The FLAC3 D is used to simulate the surface grouting section.Through the calculation results and the on-site settlement monitoring data of vault of K31+565 and K31+555 sections,it confirmes that the tunnel collapse treatment effect is remarkable,which provides the reference for the treatment of similar tunnel collapse in the future.
作者
沈孟龙
杨华清
茶增云
孙丹伟
Shen Menglong;Yang Huaqing;Cha Zengyun;Sun Danwei(Xishuangbanna Jinghai Expressway Construction Investment Co.,Ltd.;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences)
出处
《勘察科学技术》
2021年第5期21-25,共5页
Site Investigation Science and Technology
基金
云南省交通科技项目《云交科教[2019]52号》
国家自然科学基金重点项目(41731284)
国家自然科学基金面上项目(51579235)
关键词
隧道塌方
富水
全—强风化花岗岩
地表注浆
沉降监测
tunnel collapse
rich water
fully—strongly weathered granite
surface grouting
settlement monitoring
