一种用于海洋工程中的上拔式静力触探技术可行性研究

由于海洋环境较为复杂,目前已有的几种原位测试方法在获取海洋工程地质原状土样物理力学性质的应用方面各有所限制。现提出的一种新型上拔式静力触探测试技术可以解决其中存在的问题,为了验证该测试方法的可行性,在近似海洋地层的场地中进行静力触探、旁压试验和上拔式静力触探测试,对比几种原位测试方法的测试参数随深度变化的曲线,并对比其变化趋势。发现上拔式静力触探测试参数与现有的几种原位测试参数在不同程度上具有相似的变化趋势,由此证明上拔阻力能够反映土体物理力学性质,采用上拔式静力触探获取原状土的物理力学性质是可行的。研究成果对上拔式静力触探的深入研究和推广应用奠定了基础。

Feasibility of Pull-out Cone Penetration Test in Offshore Engineering

Due to the complex environment of oceans, present in-situ test methods are of some limitations in obtaining the physical and mechanical properties of undisturbed soil in offshore engineering applications. A novel pull-out cone penetration test (CPT) is proposed to solve the problems. In order to verify the feasibility of this method, we conducted CPT, pressuremeter test, and pull-out CPT and compared the curves of test parameters against depth as in different in -situ test methods. We found that the test result obtained by the pull-out CPT was of similar variation trends with those of other test methods, implying that pull-out resistance is able to reflect soil’s physical and mechanical properties, and that the proposed pull-out CPT is feasible. The research results lay the foundation for further research and application of pull-out CPT.