岩溶区域内地下连续墙施工中问题探讨

Discussion on Problems in Construction of Underground Diaphragm Wall in Karst Area

摘要:

地下连续墙等基坑支护施工时会遇到各种各样的复杂地层，岩溶即其中之一。岩溶地质条件对于地下连续墙施工极为不利。基于实际施工经验，对成槽施工前溶洞勘察、成槽过程中岩溶问题处理进行详细讨论。讨论内容包括：溶洞中存在漂石、斜岩情况的处理以及溶洞导致的塌方和路面下沉等问题的处理，并基于实际经验给出部分岩溶区域地下连续墙施工建议。

Abstract:

The construction of underground diaphragm walls and other foundation pit support will encounter a variety of complex strata, one of which is karst. Karst geological conditions are extremely unfavorable to the construction of underground diaphragm walls. Based on the actual construction experience, the cavern investigation before trenching and the karst problems during trenching are discussed in detail. The discussion includes the treatment of the presence of boulders and sloping rocks in the cavern, as well as the treatment of cave-in and roadway sinking caused by the cavern, and the suggestions for the construction of underground diaphragm walls in some karst areas based on actual experience are given.