摘要
云南昭泸高速地处云贵高原,桥隧比达76%,隧道掘进时围岩环境存在富水破碎、节理裂隙发育和溶腔溶洞等典型喀斯特地貌特征,以大河隧道开挖过程中遇见的局部塌方和溶腔涌水两个典型事故为例,根据现场超前地质预报、围岩变形量测、塌方量估算和水流量监测等数据,分别采取变更支护参数、超前预注浆、改变注浆浆液配比等措施,帮助大河隧道顺利贯通,为类似工程提供参考和借鉴。
Yunnan Zhaolu expressway is located in the Yunnan Guizhou Plateau, with a bridge tunnel ratio of 76%.During tunnel excavation, the surrounding rock environment has typical karst landform characteristics such as water rich fracture, joint fissure development and karst cavity. Taking two typical accidents of local collapse and karst cavity water gushing encountered during Dahe tunnel excavation as examples, according to the on-site advanced geological prediction, surrounding rock deformation measurement. According to the data of collapse estimation and water flow monitoring, measures such as changing support parameters, pre grouting in advance and changing the ratio of grouting slurry have been taken to help the smooth connection of Dahe tunnel and provide reference for similar projects.
作者
许定伦
徐金峰
任技香
唐侃
Xu Ding-lun;Xu Jin-feng;Ren Ji-xiang;Tang Kan
出处
《建筑技术开发》
2022年第9期101-104,共4页
Building Technology Development
基金
云南省交通运输厅科技项目(云交科教便〔2021〕7号)
云南省交通运输厅科技项目(云交科教〔2016〕160号(四))。
关键词
喀斯特地貌
公路隧道
塌方处理
涌水处治
Karst landform
highway tunnel
collapse treatment
water inrush treatment
