全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
工程力学  2015 

侧向预压增量法解析土压力

DOI: 10.6052/j.issn.1000-4750.2014.04.S061, PP. 20-26

Keywords: 摩阻抗剪强度,主压应力增量,侧壁直立深度,土楔体滑移面,主动极限平衡,广义折线性

Full-Text   Cite this paper   Add to My Lib

Abstract:

随着基坑分层挖深,在侧壁土体自重作用下,土楔体滑移斜面会处于主动极限平衡状态(向下滑移)。在此状态下由锚杆或支顶对侧壁施加的预压力传至土楔体滑移面上,在土粒间产生的压应力、剪应力、摩阻抗剪强度增量能平衡阻止斜面向下滑动。当继续挖深可使其再处于上述状态。基于这一概念结合莫尔作用应力及库仑强度理论推证导出:抗剪应力强度增量与主应力增量之间函数式,再归并导得:大小主压应力增量相关公式。给出基坑挖深土楔体内应力分布图,建立侧向预压力与基坑顶面竖向荷载作用下基坑侧壁直立深度解析公式,它可适用于土工试验广义折线性强度理论,并绘以应力圆剪切包线几何图式,给出非线性内力分析方法。与当前土压力作用模式对比可明显增加基坑挖深。

References

[1]  Bai Fubo. Internal force analysis of braced retaining structures [J]. Engineering Mechanics, 1998, 15(Suppl): 601―613. (in Chinese)
[2]  白福波. 支挡结构计算分析[J]. 建筑结构学报, 1989, 10(2): 68―78. Bai Fubo. Analysis for retaining structures [J] Journal of Building Structures, 1989,10(2): 68―78. (in Chinese)
[3]  刘国彬, 王卫东. 基坑工程手册[M]. 北京: 中国建筑工业出版社, 2009, 11: 147―229. Liu Guobin, Wang Weidong. Excavation engineering- manual [M]. Beijing: China Architecture and Building Press, 2009, 11: 147―229. (in Chinese)
[4]  Riccardo Conti, Giulia M B Viggiani, Simone Cavallo. A two-rigid block model for sliding gravity retaining walls [J]. Soil Dynamics and Earthquake Engineering, 2013(55): 33―43.
[5]  Jean-Alain Fleurisson. Slope design and implementation in open pit mines [J]. Geological and Geomechanical Approach Procedia Engineering, 2012(46): 27―38.
[6]  Donald P Coduto, Jock M Scott, Kent McMillan, James J Weaver, Kwok Tam. Shear strength characterization and stability assessment of urban open-pit mine slopes [J]. Geo-Congress, 2013: 167―181.
[7]  朱彦鹏, 叶帅华. 水平地震下框架锚杆支护边坡简化分析方法[J]. 工程力学, 2011, 28(12): 27―32, 38.
[8]  Zhu Yanpeng, Ye Shuaihua. Simplified analysis of slope supported with frame-anchors under lateral seismic loading [J]. Engineering Mechanics, 2011, 28(12): 27―32, 38. (in Chinese)
[9]  陈炎玮, 崔京浩. 多支撑桩墙的简化计算[J]. 工程力学, 1998, 15(增刊): 390―397.
[10]  Chen Yanwei, Cui Jinghao. Simplified calculation of multi-supported piling wall [J]. Engineering Mechanics, 1998, 15(Suppl): 390―397. (in Chinese)
[11]  宋二祥, 汪浩, 杨军. 部分排水条件下土-结构动力相互作用[J]. 工程力学, 1998, 15(增刊): 364―368.
[12]  Song Erxiang, Wang Hao, Yang Jun. The dynamic interaction between soil and structure under partially drainage condition [J]. Engineering Mechanics, 1998, 15(Suppl): 364―368. (in Chinese)
[13]  张明聚, 宋二祥, 陈肇元, 崔京浩. 土钉支护的三维非线性有限元分析[J]. 工程力学, 1998, 15(增刊): 341―346.
[14]  Zhang Mingju, Song Erxiang, Chen Zhaoyuan, Cui Jinghao. The 3-D finite element nonlinear analysis of soil nailing support [J]. Engineering Mechanics, 1998, 15(Suppl): 341―346. (in Chinese)
[15]  白福波. 横梁支撑挡土结构内力分析[J]. 工程力学, 1998, 15(增刊): 601―613.

Full-Text

Contact Us

[email protected]

QQ:3279437679

WhatsApp +8615387084133