全断面超前帷幕注浆止水技术在城市轨道交通施工中的应用

The Application of Full Face Advanced Curtain Grouting Water Sealing Technology in the Construction of Urban Rail Transit

城市轨道交通施工风险等级最高、施工难度最大,尤其在富水的粉砂粉土地层中进行地铁隧道施工,对隧道开挖过程的中的防水止水要求更高。通过分析地铁联络线施工过程的难点,结合其地质条件和地层止水技术研究,本文分析了全断面超前帷幕注浆止水技术的原理和关键参数,并结合地面辅助降水的综合止水措施,在地铁轨道交通施工过程进行了成功应用。不仅确保了地铁工程顺利施工,也可为类似地质条件的止水施工提供技术基础。

The construction of urban rail transit has the highest risk and the most difficult construction,especially for the construction of subway tunnel in the water rich silt soil layer,which has higher waterproof and water stop requirements in the process of tunnel excavation.Based on the analysis of the difficulties in the construction process of the subway connecting line,combined with the geological conditions and the study of the stratum water stop technology,this paper analyzes the principle and key parameters of the full section advanced curtain grouting water sealing technology.Combined with the comprehensive water stop measures of the ground auxiliary precipitation,it has been successfully applied in the construction process of subway rail transit,which not only ensures the smooth construction of the subway project,but also provides technical basis for the water stop construction in similar geological conditions.