首页 | 期刊介绍 | 编委会 | 道德声明 | 投稿指南 | 常用下载 | 过刊浏览 | In English
引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 25次   下载 0  
分享到: 微信 更多
海底麻坑内外土体物理力学特性差异研究
何旭涛
国网浙江省电力有限公司舟山供电公司
摘要:
海底麻坑在我国近海海底广泛分布,麻坑内气体喷溢后土体物理力学性质的变化对海洋工程建设具有重大影响。本文以杭州湾口外软土海底发现的大型麻坑为研究对象,分别在麻坑内外进行了4站15m孔压静力触探(CPTU)测试,结合2根60m钻孔柱状样共48个样品的常规土工试验数据,分析海底麻坑内外土体的物理力学性质差异。结果表明麻坑内土体相较麻坑外土体抗剪强度高、压缩模量大,饱和度、孔隙率和含水量低,浅层气在海底土体中的赋存形式是造成这种差异的主要原因。
关键词:  孔压静力触探(CPTU)  海底麻坑  土性差异
DOI:10.11759/hykx20190415001
分类号:
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
Study on the Difference of Physical and Mechanical Properties of Soil inside and outside Seabed pockmark
hexutao
Zhoushan Power Supply Company, State Grid Zhejiang Electric Power Co., Ltd.
Abstract:
Seabed pockmark are widely distributed in the offshore seabed of China.The changes of soil physical and mechanical properties after gas spills in pockmarks have a significant impact on the construction of seabed projects. In this paper, the large pockmarks found on the soft soil seabed outside the Hangzhou Bay Estuary are taken as the research objects. In order to analyze the difference of physical and mechanical properties of soil inside and outside pockmark ,the 15 m pore pressure cone penetration test (CPTU) at four stations and the 60 m borehole column geotechnical test at two stations are carried out respectively. The results show that the soil phase in the pockmark has higher shear strength, higher compressive modulus, lower saturation, porosity and water content than that outside the pockmark. The occurrence of shallow gas in subsea soil is the main reason for this difference.
Key words:  pore pressure cone penetration (CPTU)  seabed Pockmark  soil property difference
版权所有 《海洋科学》编辑部 Copyright©2008 All Rights Reserved
主管单位:中国科学院 主办单位:中国科学院海洋研究所
地址:青岛市南海路七号  邮编:266071  电话:0532-82898755  E-mail:marinesciences@qdio.ac.cn
技术支持:北京勤云科技发展有限公司