西南某铁路特大桥综合勘察认识

研究目的:地质地形环境复杂时,特大桥应综合利用适宜的勘察方法.本文以西南某铁路特大桥为例,分析和对比各种勘察方法及其成果运用,以得出对复杂地质条件下特大桥勘察过程中确保勘察精度的认识.研究结论:复杂地质地形条件下,特大桥勘察应以现行规范为依据、地质调绘为基础,采用多种勘察方法与手段,互为补充、相互验证,通过综合分析,判断岩土层及构造发育特征、确定岩土参数、对场地及基础方案进行评价.

Knowledge on Comprehensive Survey for A Super Big Railway Bridge in Southwest China

Research purposes: The appropriate comprehensive approaches should be adopted to the super big bridge in the area with the complex geological and topographical conditions.Taking a super big railway bridge in the Southwest China as an example,this paper analyzes and compares the various geological survey approaches and their effects and offers the knowledges on ensuring the survey precision for the super big bridge in the area with the complex geological condition. Research conclusions:Under the complex geological and topographical conditions,the geological investigation for the super big bridge should be conducted according to the existing norms and based on the geologic mapping.The variety of survey means should be used to complement and validate each other.By making the comprehensive analysis,the development characteristics of the rock-soil layer and structure can be judged,the geotechnical parameters can be determined and the site and foundation programmes can be evaluated.