东海陆架海底浅表层土静力触探参数与物理力学指标相关分析

Correlative study of cone penetration test parameters and physico-mechanical properties of the seabed soil on the East China Sea Continental Shelf

海底土的物理、力学特性是海洋地质学、海洋土工学等调查研究与海洋资源开发环境条件调查和评价等方面非常重要的资料,海底静力触探试验(CPT)是获取这方面资料的一种快速高效、成本低、测试精度高的原位测试方法。它可同时获取海底土锥尖阻力、侧摩阻力等方面的连续原位测试数据,这些数据与海底土取样样品测试分析资料及物探资料结合,可对海底土的工程特性等作比较全面的分析和评价。静力触探试验(CPT)具有其它方法不可替代的作用,其应用也越来越广泛,本文对采集或搜集的东海大陆架海底土样的静力触探参数与海底土样的物理力学指标进行相关分析,建立了针对东海大陆架海底浅表层土的静力触探参数与物理力学指标之间的相关方程,利用相关方程可以通过静力触探的数据来推算土的物理力学指标,进而对海底土的工程情况作较全面的评价。

Cone penetration test （CPT） is a quick, continuous data, repeatable and penetration details, and rapid operation in-situ testing method. Following the rapid development of offshore engineering, offshore CPT has been developed as an internationally recognized standard, and become more and more widely used as an internationally recognized standard, and become more and more widely used in supporting the development of offshore industry. Therefore, it is important to know the marine CPT techniques and its application, to verify the suitability of the interpretation of CPT data, to propose the reasonable empirical factors used to obtain soil parameters in offshore geotechnical engineering in China. In this paper, cone penetration test （CPT） parameters （cone resistance and sleeve friction） and physico-mechanical properties of the seabed soil collected on the East China Sea Continental Shelf were analyzed correlatively to obtain the statistical regression equations between them. There appear high correlative coefficients. These regression equations can be used to predict seabed soil physico-mechanical properties from CPT parameters and then to evaluate the engineering characteristics of the seabed soil comprehensively.