集成多种方法的溶洞顶板稳定性评价  

Stability evaluation of karst cave roofs with multiple methods

作　　者：李志宇[1] 郭纯青[1] 田月明[1] 胡君春 田西昭 

机构地区：[1]广西矿冶与环境科学实验中心桂林理工大学,广西桂林541006 [2]云南省煤炭地质勘查院,昆明650218 [3]河北省环境地质勘查院,石家庄050021

出　　处：《工程勘察》2014年第2期5-11,共7页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金(41172230)

摘　　要：由于岩溶区岩溶发育的复杂性、多变性和特殊性,各类评价溶洞稳定性的方法均存在其自身的缺点,致使评价结果与实际存在一定差异。本文采用顶板抗弯强度评价洞室稳定法、顶板抗剪强度评价洞室稳定法和单跨梁模型法三种结构力学方法对溶洞顶板稳定性进行半定量评价,再结合FLAC3D数值模拟方法在天然基础和桩基础条件下进行综合定量评价研究。多种方法综合集成评判,互相类比和相互补充,半定量和定量综合分析,对溶洞发育类型、特征、结构和稳定性综合评价,为岩溶地基处理提供了思路,增强工程建设的安全性。Due to the complexity, variability and specificity of the karst development in karst areas, all kinds of evaluation methods for the stability of karst caves have their own shortcomings, resulting in some differences between the evaluation results and the actual values. The semi-quantitative evaluation for the stability of the cavern roof based on the combined three kinds of structural mechanics method that is the flexural strength method, the shear strength method and the single-span beam model is discussed, combined with the quantitative evaluation by using FLAC3D numerical simulation method under the conditions of the natural foundation and pile foundation. The integrated evaluation by several methods is carried out with the comprehensive analysis of semi-quantitative and quantitative for the mutual analogy and mutual complement. structure and stability construction. The comprehensive evaluations provide the ideas for the karst of the cave development foundation treatment, and types, characteristics, strengthen the safety of

关 键 词：溶洞 稳定性 结构力学 FLAC3D 

分 类 号：TU457[建筑科学—岩土工程]