综合勘察技术在北江濛里船闸工程中的应用

针对北江濛里枢纽二线船闸工程所处炭质灰岩、炭质页岩与泥砂岩、灰岩互层或混合区,存在深大基坑开挖的稳定性、超60 m人工高边坡的稳定性、强岩溶区的处置等突出的岩土工程问题,开展专门研究。采用工程地质调绘、钻探、物探、原位测试及室内试验等综合勘察技术,尤其采用了钻孔剪切试验、管波探测、孔内电视等多种岩土勘察新技术,得出更真实可靠的边坡稳定计算所需的抗剪强度参数以及岩溶发育强度特征等成果。该成果为该船闸工程的建设奠定良好基础,可供同类工程借鉴。

Application of integrated investigation technology in Beijiang Mengli ship lock project

The second ship lock of Beijiang Mengli is situated in the interbedding of carbonaceous limestone,carbonaceous shale and siltstone,limestone or a mixing zone.We carry out the research on geotechnical problems including the stability of deep foundation pit,the stability of excavated slope higher than 60 m and intensive karst treatment.We also apply the integrated investigation technology including engineering geological survey,drilling,geophysical survey,in-situ test,laboratory soil tests,and new investigation technology such as shear test,tube wave testing,borehole TV,wave velocity testing to obtain much more reliable shear strength parameters for calculation of slope stability and degree of karst development.It can make a good base for Beijiang Mengli ship lock construction and provide the reference for the similar projects.