基于地质预报的地铁车站岩溶预注浆处理技术

Karst Pre-grouting Treatment Technology of Subway Station Based on Geological Prediction

武汉地区岩溶地质灾害较为严重,导致地铁车站施工中经常需要进行岩溶处理,若采用常规的岩溶处理施工方法,效果不稳定,且在施工过程中进行处理,存在坍孔、地质塌陷等安全风险,将较大程度延缓施工工期,造成施工安全风险,同时导致经济和工期的损失。通过地质雷达法、表面波法等探测手段对岩溶溶洞进行超前探测和预报,提前发现岩溶发育异常区,然后通过地质钻探确定岩溶溶洞埋深及大小,并对发现的溶洞进行注浆处理,通过提前预测和预处理,保证了施工安全,缩短了工期,同时注浆处理成本较低,具有良好的推广应用价值。

The Karst geological disasters are relatively serious in Wuhan area,which often requires Karst treatment in subway station construction.If the conventional Karst treatment construction method is adopted,the effect is unstable,and there are safety risks such as hole collapse and geological collapse during the construction process,which will delay the construction period to a great extent,and cause construction safety risks,economic and construction period losses.Through geological radar method,surface wave method and other detection means,the Karst cave is detected and predicted in advance,and the abnormal Karst development area is found in advance.Then,the buried depth and size of the Karst cave are determined through geological drilling,and the discovered Karst cave is grouted.The prediction and pretreatment in advance ensure the construction safety,shorten the construction period,and reduce the cost of grouting treatment,which has good popularization and application value.