海洋工程土样扰动与土工试验准确性探讨  

Accuracy Discussion on Soil Sample Disturbance and Soil Tests in Marine Project

作　　者：陈思 陈亮 杨学东 Chen Si;Chen Liang;Yang Xuedong(East China Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group)

机构地区：[1]中国电力工程顾问集团华东电力设计院有限公司,上海市200331

出　　处：《勘察科学技术》2024年第S1期31-36,共6页Site Investigation Science and Technology

摘　　要：在我国“双碳”战略目标的驱动下,近年来国内各类海洋工程发展迅速。目前海洋土的工程性质仍主要通过土工试验来确定,试验成果的准确性与海洋工程的经济性、安全性密切相关。由于海洋环境的特殊性,海洋钻探采取的土样更易扰动,加上我国海洋土具有灵敏度高、易扰动等特点,极易影响到土工试验对土体性质的判定。该文简要分析和总结了海洋工程中引起土样扰动的主要因素,提出了减少土试样扰动的措施、建议,介绍了几种适用于工程实践的评价土试样质量的物理和力学方法,并以海洋工程设计时较关键的黏性土不排水抗剪强度和砂土内摩擦角这两个土体参数为例,从土工试验方法的选择、试验应力的确定以及砂土扰动样的重新制样等方面,探讨了提高土工试验成果准确性的方法。Driven by“double carbon”strategic goal,various domestic marine projects have developed rapidly in recent years in our country.At present,the engineering properties of marine soil are still mainly determined through soil tests,and the accuracy of the test results is closely related to the economy and safety of marine engineering.Due to the particularity of the marine environment,soil samples collected from marine drilling are more susceptible to disturbance.In addition,marine soil has the characteristics of high sensitivity and easy disturbance in our country,which can easily affect the determination of soil properties in soil tests.This paper briefly analyzes and summarizes the main factors causing soil sample disturbance in marine engineering,puts forward suggestions and measures to reduce soil sample disturbance,introduces several physical and mechanical methods suitable for engineering practice to evaluate the quality of soil samples.From the aspects of the selection of soil test methods,determination of test stress and re-preparation of disturbed sand samples,taking the two soil parameters of undrained shear strength of cohesive soil and internal friction angle of sand as an example,which are more critical in marine engineering design,the methods improving the accuracy of geotechnical test results are discussed.

关 键 词：海洋工程 土工试验 土样扰动 不排水抗剪强度 内摩擦角 

分 类 号：P75[天文地球—海洋科学] TU41[建筑科学—岩土工程]