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在喀斯特岩溶地区进行公路工程等建设时,除必须正确处理与非岩溶地区相同的工程地质问题外,还要认真考虑由岩溶和岩溶洞穴引起的岩体地基稳定问题,并作好岩体地基的稳定性评价工作。在全面分析含岩溶洞穴岩体地基稳定性的影响因素的基础上,系统阐述岩溶洞穴稳定性评价方法和含岩溶洞穴岩体地基稳定性评价方法。研究结论表明,含岩溶洞穴岩体地基的稳定性评价可以分为建筑场地的稳定性评价和建筑地基的稳定性评价两个阶段。其中,建筑场地的稳定性评价是指选址和初勘阶段的区域性评价,主要是为场地选择和总体布置提供依据,应着重从岩溶的发育规律、分布情况以及稳定程度等方面,对场地的岩土工程地质条件进行评价;建筑地基的稳定性评价主要是在地基基础设计的详勘阶段,为基础设计和工程处理提供依据,属于个体岩溶形态的评价,主要针对具体建筑物下及附近对地基稳定性有影响的个体岩溶形态进行评价,也可以采用模糊综合评判法进行定量评价。
In the karst area of highway construction and other construction, in addition to the non-karst areas must be properly addressed the same engineering geological problems, but also seriously consider the karst and karst caves caused by the stability of the rock mass foundation, and make the foundation of the rock mass Stability evaluation. On the basis of comprehensively analyzing the influencing factors of foundation stability of karst cave rock mass, the method of evaluating the stability of karst cave base and the method of evaluating the foundation stability of karst cave rock mass are systematically expounded. The conclusion of the research shows that the stability evaluation of the foundation containing karst caves can be divided into two stages: the stability evaluation of the construction site and the stability evaluation of the construction foundation. Among them, the stability evaluation of construction site refers to the regional evaluation of site selection and initial exploration stage, which mainly provides the basis for site selection and overall layout. The emphasis should be placed on the development of karst, its distribution and stability, Geotechnical engineering geology conditions evaluation; the stability of the building foundation evaluation is mainly in the foundation design of the detailed survey phase, provide basis for basic design and engineering treatment, belonging to individual karst morphology assessment, mainly for specific buildings and nearby The individual karst morphology influencing the stability of the foundation can be evaluated, and the fuzzy comprehensive evaluation method can also be used for quantitative evaluation.