粉土中桶基负压沉贯安全机制分析

doi:10.3969/j.issn.1674-0696.2011.04.022

重庆交通大学学报（自然科学版） ›› 2011, Vol. 30 ›› Issue (4): 798-802.DOI: 10.3969/j.issn.1674-0696.2011.04.022

粉土中桶基负压沉贯安全机制分析

齐剑峰¹，雷霆¹，李源¹，李安龙²

1. 河北省水资源可持续利用与开放重点实验室，河北石家庄050031; 2. 中国海洋大学海洋地球科学学院，山东青岛266100

收稿日期:2011-04-15 修回日期:2011-06-11 出版日期:2011-08-15 发布日期:2015-01-22
作者简介:齐剑峰(1975—)，男，河南太康人，副教授，博士，主要从事海洋土力学方面的研究。E-mail:jianfengluck@163.com。
基金资助:
国家自然科学基金项目(50579006，50639010);国土资源公益行业科研资助项目(201011003-11);973专项基金项目 (2010CB428805-1)

Safety Mechanism Analysis of Bucket Foundation Penetration in Silts

QI Jian-feng¹，LEI Ting¹，LI Yuan¹，LI An-long²

1. Hebei Province Open Laboratory of Sustained Development and Utilization of Water Resources，Shijiazhuang 050031， Hebei，China; 2. College of Marine Geosciences，Ocean University of China，Qingdao 266100，Shandong，China

Received:2011-04-15 Revised:2011-06-11 Online:2011-08-15 Published:2015-01-22

摘要/Abstract

摘要： 通过模型试验与有限元数值计算，分析了桶基负压沉贯过程中粉土土体的渗流梯度与土塞发展。研究表明: 桶基内外的渗流作用是土塞形成的直接原因，渗流作用不仅改变土体的渗透性，而且改变土体的物理力学性质，使土体的流变性质、时间效应增强，桶内粉土存在较大的渗流梯度和阻止发生流土破坏的安全机制; 土塞破坏既不是渗透变形，也不是单一的卸荷膨胀，而是在桶基安全机制保护下的一种复杂变形破坏形式。

关键词: 桶形基础, 粉土, 土塞, 渗流梯度, 安全机制

Abstract: Based on the model tests and FEM，a comprehensive analysis of the hydraulic gradient and soil slug in the process of suction penetration of bucket foundation in the silts was carried out to deeply study the suction penetration mechanism． The results indicate that the seepages inside and outside of the bucket foundation are the direct reasons for the formation of soil slugs． The seepage changes not only the permeability of the soil body but also the physical and mechanical properties， and enhances the rheological property and time effect，and there are high hydraulic gradient and the safety mechanism preventing soil flow failure for the silts in the bucket foundation． Thus，the soil slug failure is not seepage failure，or unloading expansion yet，but is a complex deformation failure mode under the protection of safety mechanism of bucket foundation．

Key words: bucket foundation, silt, soil slug, seepage hydraulic gradient, safety mechanism

中图分类号:

齐剑峰，雷霆，李源，李安龙. 粉土中桶基负压沉贯安全机制分析[J]. 重庆交通大学学报（自然科学版）, 2011, 30(4): 798-802.

QI Jian-feng，LEI Ting，LI Yuan，LI An-long. Safety Mechanism Analysis of Bucket Foundation Penetration in Silts[J]. Journal of Chongqing Jiaotong University(Natural Science), 2011, 30(4): 798-802.

参考文献

[1]Taiebat H A,Carter J P.Interaction of forces on caissons in undr-ained soils[C]//Proceedings of the 15th International Offshoreand Polar Engineering Conference.Seoul,Korea:[s.n.],2005:625-632.
[2]Andersen K H,Dyvik R,Lauritzsen R,et al.Model tests of grav-ity platforms:Ⅱinterpretation[J].Journal of Geotechnical Engi-neering,1989,115(11):1550-1568.
[3]鲁小兵,郑哲敏,张金来.海洋平台吸力式基础的研究与进展[J].力学进展,2003,33(1):27-40.
LU Xiao-bing,ZHENG Zhe-min,ZHANG Jin-lai.Progress in thestudy on the bucket foundations of offshore platform[J].Advancesin Mechanics,2003,33(1):27-40.
[4]武科,马明月,范庆来,等.软土地基上吸力式桶形基础的扭剪承载力分析[J].交通科学与工程,2010,26(4):51-54.
WU Ke,MA Ming-yue,FAN Qing-lai,et al.Analysis of torsionalresistance of suction bucket foundation[J].Journal of TransportScience and Engineering,2010,26(4):51-54.
[5]丁红岩,张浦阳.海上吸力锚负压下沉渗流场的特性分析[J].海洋技术,2003,22(4):44-48.
DING Hong-yan,ZHANG Pu-yang.Suction penetration seepagefield’s characteristics of suction anchor[J].Ocean Technique,2003,22(4):44-48.
[6]国振,王立忠,袁峰.黏土中吸力锚沉贯阻力与土塞形成试验研究[J].海洋工程,2011,29(1):9-17.
GUO Zhen,WANG Li-zhong,YUAN Feng.An experimental in-vestigation of insertion resistance and soil heave during caisson in-stallation in soft clay[J].The Ocean Engineering,2011,29(1):9-17.
[7]杨少丽,李安龙,齐剑峰.桶基负压沉贯过程模型试验研究[J].岩土工程学报,2003,25(2):236-238.
YANG Shao-li,LI An-long,QI Jian-feng.Experimental study onbucket foundation during penetration by suction[J].Chinese Jour-nal of Geotechnical Engineering,2003,25(2):236-238.
[8]丁红岩,刘振勇,陈星.吸力锚土塞在粉质黏土中形成的模型试验研究[J].岩土工程学报,2001,23(4):441-444.
DING Hong-yan,LIU Zhen-yong,CHEN Xing.Model tests onsoil plug formation in suction anchor for silty clay[J].ChineseJournal of Geotechnical Engineering,2001,23(4):441-444.
[9]冯秀丽,马艳霞,林霖,等.现代黄河水下三角洲粉土的临界水力坡降探讨[J].海洋科学,2002,26(6):54-57.
FENG Xiu-li,MA Yan-xia,LIN Lin,et al.Discuss of silt criticalhydraulic gradient in modern Yellow Rive subaqueous delta[J].Marine Science,2002,26(6):54-57.
[10]杨树耕,孟昭瑛,许涛,等.海上桶基平台负压沉贯阻力的数值计算研究[J].海洋学报,1999,21(6):94-101.
YANG Shu-geng,MENG Zhao-ying,XU Tao,et al.Numericalstudy for penetrating resistance of offshore bucket foundation plat-form[J].Acta Oceanologica Sinica,1999,21(6):94-101.
[11]钱家欢,殷宗泽.土工原理与计算[M].2版.北京:中国水利水电出版社,1996.

粉土中桶基负压沉贯安全机制分析

Safety Mechanism Analysis of Bucket Foundation Penetration in Silts

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 5

编辑推荐

Metrics

[1]	崔江浩. 一种土塞效应的计算方法[J]. 重庆交通大学学报（自然科学版）, 2014, 33(3): 98-101.
[2]	朱永，宗旭辉. 粉质土的土质特性及处治方法[J]. 重庆交通大学学报（自然科学版）, 2013, 32(2): 220-0223.
[3]	朱永，宗旭辉. 粉质土的土质特性及处治方法[J]. 重庆交通大学学报（自然科学版）, 2013, 32(2): 220-223.
[4]	王加龙，何兆益，黄维蓉. 稳定粉土路面基层材料的力学特性研究[J]. 重庆交通大学学报（自然科学版）, 2005, 24(3): 39-43.
[5]	王加龙，何兆益，黄维蓉. 无机结合料和固化剂稳定粉土收缩性能研究[J]. 重庆交通大学学报（自然科学版）, 2005, 24(2): 83-89.