小寨特大桥综合勘察及场地稳定性评价

Evaluation and Analysis on Stability of Xiaozhai Grand Bridge

结合镇宁至胜境关高速公路小寨特大桥工程实际,采用工程地质钻探、槽探、洞探、现场原位试验并结合地表工程地质调绘等方法对桥位区的水文地质与工程地质条件进行了综合勘察,并对桥位的合理性、场地稳定性和不良地质体进行了评价,提出了"先边坡治理后基础开挖"的施工方案,保证了大桥施工安全和工期。

Combining Xiaozhai grand bridge from Zhengning to Shenjinguan expressway,it synthesized some methods to prospect,such as engineering geological drilling、trenching、tunnel、situ-testing and surface engineering geological mapping,and find out the hydrogeology and engineering geology condition in detail,evaluated the rationality、site stability and harmful geologic body of bridge location.Then,the construction scheme,＂side slope managing first foundation excavation later＂ has been suggested and ensured the safety and time.