深基坑强风化砂岩地质土方开挖施工技术探讨

An Investigation into Deep Foundation Excavation Technology in Regions with Geological Characteristics of Highly Weathered Sandstone

强风化砂岩暴露于空气中,遇水极易软化崩解,软化崩解后成细砂状,通过对主楼部位局部开挖实探及钎探,强风化砂岩含极丰富的地下水,开挖容易塌方。通过实际工程案例来探讨深基坑开挖项目中强风化砂岩地质层土方开挖施工技术,对于我国的土方开挖施工技术的发展有着重要的意义。

Once highly weathered sandstone is exposed to air and contacts with water,it would get softened and disintegrate into sand-like gravels.According to the practical exploration and rod sounding during the excavation for part of the main building,it was found that highly weathered sandstone contains abundant underground water,and it is likely to collapse if excavating it,it is significant to investigate excavation technology for deep foundation excavation where the earth is highly weathered.