岩溶地区公路桥基勘察与洞穴稳定性评价

Survey of Highway Bridge Foundation and Stability Evaluation of Cave in Carst Region

针对岩溶地区公路勘察中遇到的岩溶洞穴问题,在工程地质调绘的基础上,以钻探和钻孔声波测试为主要勘探手段,获取桥基岩体强度和完整性系数,评价桥基岩体基本质量,提出岩溶洞穴稳定性评价参数,采用定性、半定量、定量3种评价方法进行岩溶洞穴稳定性评价。这些评价方法在贵州镇宁至水城公路草火洞大桥上得到成功应用。

Rock intensity and integrity of bridge foundation are obtained based on surveying and mapping of engineering geology, by means of drilling and testing of sound wave. So the basic rock quality of the foundation is evaluated and the parameters of stability evaluation of carst cave are presented, with qualitative methed semi-quantitative method and quantitative method. And these methods have a successful application on Huoshipo Bridege of Zhen-Shui Highway, which is from Zhenning to Shuicheng.