基于静力触探的渠道及人工湖工程地质评价

Engineering geological evaluation of canal and artificial lake based on CPT

依托仙桃市某排涝防涝整治工程,采用地质钻探与静力触探相结合的方法,对渠道和人工湖场区的岩土进行钻探揭示和原位测试,分析各层土的地基承载力及压缩模量、不排水抗剪强度等,并利用测试成果对岸坡稳定、基础持力层、支护构筑物稳定性、节制闸稳定性等工程地质问题进行评价。研究成果表明,比贯入阻力与地基承载力特征值、压缩模量、内摩擦角与不排水抗剪强度具有明显的线性关系;利用静力触探试验能够对渠道和人工湖的工程地质进行快速测试和定量评价,采用测试成果辅助渠道和人工湖的整治效果显著。

Based on a drainage and waterlogging control project in Xiantao City,using the method of combining geological drilling and static cone penetration,the rock and soil in the channel and artificial lake area are drilled and tested in situ,and the bearing capacity,compression modulus,undrained shear strength of each layer of soil are analyzed.The test results are used to analyze the stability of bank slope,foundation bearing stratum,supporting structure and control gate finally,the engineering geological problems are evaluated.The research results show that the specific penetration resistance has an obvious linear relationship with the characteristic value of foundation bearing capacity,compression modulus,internal friction angle and undrained shear strength;the CPT test can be used to quickly test and quantitatively evaluate the engineering geology of the channel and artificial lake,and the test results can be used to assist the regulation of the channel and artificial lake.