路基溶洞上覆土层的含水率特征分析

根据钻探试验和含水率试验对含水率特征进行分析。因考虑到含水率分布不可避免地处于离散状态，并包含各种不确定性，故采用贝叶斯方法，以一个概率统计的方式根据含水率数据划分溶洞上覆土层含水状态，结合钻探结果，将土层划分为在近地表范围内的正常区、地下水位以下的过渡区和风化强烈呈现松散状态溶洞顶板附近的侵蚀区。其中，侵蚀区土体由于受地下水的侵蚀作用，土体物理力学性质极差，是形成潜在土洞的位置，应作为处治的重点。

Analysis on Moisture Content Characteristics of Overlaying Soil of Subgrade Karst Cave

The moisture content characteristics are studied by drilling test and moisture content test. Considering the moisture content distribution is in discrete state inevitably and contains various uncertainties, the moisture states of overlaying soil of the karst cave are divided based on the moisture content data in the way of probability statistics by using Bayesian Method. The soil layer is divided into near-surface normal zone, transition zone below the groundwater level and erosion zone nearby the roof of the cave which presents loose state due to strong weathering combining with the drilling results, in which, the erosion zone is easy to form soil cave due to its poor physic-mechanical properties of soil caused by the erosion of underground water, which is the focus for disposal.