高压旋喷注浆法在桩底溶洞处理中的应用与探讨

Application and Discussion on High-pressure Jet Grouting Method in Treatment of Pile Bottom Cave

我国南方地区岩溶现象分布比较普遍,一般以隐蔽的形式存在,现有勘探手段难于事先查明其准确位置及大小,这给工程基础构成了极大的危害性,因而在岩溶区修建工程时,处理不当将严重威胁使用过程中的安全。结合岩溶区桩基底部的施工实践,介绍了成桩后对桩基底部溶洞处理的技术和施工工艺,对岩溶区的桩基工程具有一定的工程参考意义。

Karst phenomena are widely distributed in the South China and usually exist in the hidden form.It is hard to find out its exact positions and sizes in advance by the existing exploration means,which has caused the great harm to the engineering foundation.Therefore,the improper treatment will seriously threat the safety during the construction engineering of karst area.Combined with the construction practices of pile foundation bottom in karst area,the treatment technique and construction technology of the karst cave at the bottom of pile foundation after the finished pile are introduced,which has a certain engineering reference for the pile foundation engineering in karst area.