[1]雷国辉,王轩,雷国刚.矩形槽开挖失稳滑动体形状及整体稳定分析[J].东南大学学报(自然科学版),2006,36(1):102-106.[doi:10.3969/j.issn.1001-0505.2006.01.021]
 Lei Guohui,Wang Xuan,Lei Guogang,et al.Sliding wedge shape and analysis method of global stability of rectangular excavated trenches[J].Journal of Southeast University (Natural Science Edition),2006,36(1):102-106.[doi:10.3969/j.issn.1001-0505.2006.01.021]
点击复制

矩形槽开挖失稳滑动体形状及整体稳定分析()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
36
期数:
2006年第1期
页码:
102-106
栏目:
土木工程
出版日期:
2006-01-20

文章信息/Info

Title:
Sliding wedge shape and analysis method of global stability of rectangular excavated trenches
作者:
雷国辉1 王轩12 雷国刚3
1 河海大学岩土工程研究所, 南京 210098; 2 南京市航道管理处, 南京 210036; 3 南京市水利建筑工程总公司, 南京 210036
Author(s):
Lei Guohui1 Wang Xuan1 2 Lei Guogang3
1 Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China
2 Channel Administration of Nanjing, Nanjing 210036, China
3 Nanjing Water Conservancy Construction Corporation, Nanjing 210
关键词:
地下连续墙 槽段 整体稳定性 泥浆护壁开挖 稳定分析方法 应力分析
Keywords:
diaphragm wall panel trench global stability slurry-supported excavation stability analysis method stress analysis
分类号:
TU476.3
DOI:
10.3969/j.issn.1001-0505.2006.01.021
摘要:
利用矩形槽段开挖引起周围地基土体应力变化和变形的解析解答,分析了不同长宽比槽段开挖引起的主应力变化,得到滑动体的形状近似为半椭圆体,在水平面上其长轴长度约为短轴长度的2倍,短轴长度约为槽段长宽比的0.44倍.同时将槽壁的整体稳定安全系数定义为土体抗剪强度与实际动用剪应力的比值,针对浅槽、深槽和平面应变情况下的半椭圆滑动体进行极限平衡分析,尝试提出了一种用于评价槽壁整体稳定性的分析方法,并通过该方法的实际应用结果初步验证了半椭圆滑动体假设的合理性.
Abstract:
By using an analytical solution for calculating the stress changes and displacements around an excavated rectangular diaphragm wall panel trench, the principal stress changes around trenches of various aspect ratios were analyzed and a semi-ellipsoidal sliding wedge was derived. On the horizontal plane, the length of the major axis of the semi-ellipse is about twice the length of its minor axis, and the latter is about 0.44 times of the trench’s aspect ratio. Meanwhile the factor of safety of the global stability of the trench is defined as the ratio of soil shear strength to its mobilized shear stress. Based on the limit equilibrium analysis of the semi-ellipsoidal sliding wedge for shallow trenches, deep trenches and plane strain trenches, an analytical method is proposed to evaluate the global stability of the panel trenches. In addition, the rationality of the assumed semi-ellipsoidal sliding wedge is tentatively verified by practical applications of the proposed method.

参考文献/References:

[1] 王轩,雷国辉,施建勇.矩形地连墙槽壁整体稳定分析方法的对比研究[J].岩土力学,2006(4).录用待刊.
  Wang Xuan,Lei Guohui,Shi Jianyong.Comparative study of the global stability analysis methods of rectangular diaphragm wall panel trenches [J].Rock and Soil Mechanics,2006(4).(accept to appear).(in Chinese)
[2] 雷国辉,王轩,雷国刚.泥浆护壁开挖稳定性的影响因素及失稳机理综述[J].水利水电科技进展,2006,26(1):82-86.
  Lei Guohui,Wang Xuan,Lei Guogang.Stability influence factors and instability mechanisms of slurry-supported excavations[J].Advances in Science and Technology of Water Resources,2006,26(1):82-86.(in Chinese)
[3] Lei G H.Behaviour of excavated rectangular piles(barrettes)in granitic saprolites [D].Hong Kong:Department of Civil Engineering,Hong Kong University of Science and Technology,2001.
[4] Lei G H,Ng C W W,Rigby D B.Stress and displacement around an elastic artificial rectangular hole [J].Journal of Engineering Mechanics,2001,127(9):880-890.
[5] Ng C W W,Lei G H.An explicit analytical solution for calculating horizontal stress changes and displacements around an excavated diaphragm wall panel [J]. Canadian Geotechnical Journal,2003,40(4):780-792.
[6] Lei G H.Yielding mechanisms in a rectangular trench [J].Proceedings of the Institution of Civil Engineers — Geotechnical Engineering,2005,158(GE3):169-172.
[7] Ng C W W,Yan R W M.Three-dimensional modelling of a diaphragm wall construction sequence [J].Géotechnique, 1999,49(6):825-834.
[8] 王轩.矩形地下连续墙槽壁失稳机理及其分析方法研究[D].南京:河海大学岩土工程研究所,2005.
[9] 《数学手册》编写组.数学手册[M].北京:人民教育出版社,1979:353.
[10] Tsai J S,Jou L D,Hsieh H S.A full-scale stability experiment on a diaphragm wall trench [J]. Canadian Geotechnical Journal,2000,37(2):379-392.
[11] Ishii T,Katagiri M,Saitoh K,et al.Modeling of sandy ground for the stability analysis of slurry trench[C] //Proc of the 10th Int Conf on Computer Methods and Advances in Geomechanics.Rotterdam:A A Balkema Publishers,2001:1579-1582.

备注/Memo

备注/Memo:
作者简介: 雷国辉(1972—),男,博士,副教授,leiguohui@hhu.edu.cn.
更新日期/Last Update: 2006-01-20