富水厚覆土层地区竖井施工技术

Shaft Construction Technology in the Area with Rich Water and Thick Soil

在南方滨海地区进行竖井施工,具有覆盖层厚、地下水位线高、土体内渗水通道较多发育的特点。根据此地质特点,覆盖层采用预注浆加固土体、混凝土锁口、钢拱架及小导管相结合的施工方式,以避免覆盖层开挖过程发生大规模的坍塌情况,保证了整个竖井的施工安全和施工进度。

The shaft construction in the southern coastal area has the characteristics of thick soil,high underground water level and more seepage channels in soil body.According to the geological characteristics,the overburden is constructed by the combination of pre-grouting to strengthen the soil,concrete lock,steel arch and small pipe,so as to avoid large-scale collapse during overburden excavation,and ensure the construction safety and construction schedule of the whole shaft.