岩溶区含溶洞岩石地基稳定性分析

岩溶区含溶洞岩石地基稳定性分析 English Version

中南大学资源环境与建筑工程学院；桂林工学院；桂林工学院湖南长沙　410083桂林工学院广西桂林　541004；湖南长沙　410083桂林工学院广西桂林　541004；广西桂林　541004；广西桂林　541004；

1.College of Resources Environment and Civil Engineering Central South University Changsha 410083 China 2.Guilin Institute of Technology Guilin 541004 China

摘要: 地质构造、结构面、岩层性质、溶洞洞体形态、地下水等,是定性评价溶洞地基稳定性的重要因素。利用弹性理论,推导了岩石地基中溶洞周围的应力状态,利用格里菲斯强度理论,对含溶洞岩石地基的稳定性进行了定量计算判别。并且发现基础底面尺寸、溶洞顶板厚度、溶洞跨度(直径)及溶洞的断面形状对地基稳定性的影响很大,而地下水产生的"真空吸蚀作用"对地基稳定性的影响很小,洞内充填物对地基稳定的作用不明显。
- 溶洞 /
- 地基稳定性 /
- 次生应力
Abstract: Geological structrue, structural plane, rock property, cave shape and groundwater are important factors in qualitative evaluation of stability for caved foundation.Based on elastic theory,the stress distribution around cave has been deduced in the caved rock foundation. The stability of rock foundation can be calculated and analysed by the Griffth failure theory.The size of foundation base, the thickness of cave roof,the diameter and shape of cave have great influence on foundation stability. The ’vacuum suction’ produced by groundwater has little influence on foundation stability. The effect on foundation stability is small when the cave is filled with some materials.
- cave /
- foundation stability /
- secondary stress