岩溶地区桥梁桩基勘察中的钻探技术应用

Application of Drilling Techniques in Investigation of Bridge's Pile Foundation in Karst Region

溶岩地区桥位桩基的勘察,关键是查明岩溶(溶洞、溶沟、溶槽)的分布,钻探是调查这些问题的手段之一。本文结合工程实践,把在施工过程中遇到复杂地质条件时的钻探技术及采用粘土球回填堵住漏浆等方法作一介绍,意在与大家共同探讨复杂地层钻探的技术问题,促进钻探技术的发展,提高工程勘察水平。

The key to the investigation of Bridge＇s pile foundation in Karst area is to find out the Karst distributions. Drilling is just one of the means to find out such problems. Combined with the engineering experiences, some techniques such as blocking leakage from thick liquid by means of clay ball backfilling is introduced in this paper. Its purpose is to discuss the technical problems of drilling in complicated geological layers, to improve the development of drilling technique and to enhance the level of geotechnical investigation.