福建某高速公路隧道强风化花岗岩的旁压试验

摘要

Lateral pressure test is widely used in the test of geotechnical parameters of soil body. The paper intro-duced in detail the principles and methods of lateral pressure test, applied them in in-situ test of strongly weathered granite. The experimental results show that the strength parameters of strongly weathered granite are the same as surface cohesive soil. For the rock and soil layer with the same characteristics, the strength index of soil layer is regularly enhancing with depth. Strongly weathered granite in the field has a higher level of resistance capacity to horizontal deformation, but its vertical carrying capacity is lower. Compared with in-situ standard penetration test in some boreholes, results of the two in-situ tests are well correlative.%　　旁压试验广泛应用于岩土工程土体参数测试中。根据旁压试验原理与方法，将其运用于福建某高速公路遂道强风化花岗岩原位测试中。试验结果表明：强风化花岗岩强度参数与表层粘性土相当。对于相同性质的岩土层来说，土层的强度指标随深度的增加呈规律性增强。场区内强风化花岗岩具有较高的抵抗水平向变形能力，但其竖向承载能力相对较低。与部分钻孔原位标贯试验成果对比，两种原位测试结果具很好的相关性。