考虑不同土压力模式的水泥土重力式围护墙抗倾覆稳定性分析

毛明强; 熊巨华

doi:10.11779/CJGE2014S2003

考虑不同土压力模式的水泥土重力式围护墙抗倾覆稳定性分析 English Version

毛明强^{1, 2},
熊巨华²

1. 同济大学地下建筑与工程系,上海 200092;
2. 同济大学岩土及地下工程教育部重点实验室,上海 200092

详细信息

作者简介:
毛明强(1988- ),男,研究生,主要从事复杂地质下嵌岩桩竖向承载力和风险评估等方面的研究。E-mail: 1232671@tongji.edu.cn。

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出版历程
- 收稿日期: 2014-07-27
- 发布日期: 2014-07-27

Anti-overturning stability analysis of cement-soil gravity retaining wall under different earth pressure modes

MAO Ming-qiang^{1, 2},
XIONG Ju-hua²

1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
2.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China

摘要

摘要: 墙前开挖区土压力和墙后土压力模式的确定是水泥土重力式挡土墙抗倾覆稳定性验算的关键,不同土压力模式下抗倾覆系数曲线形态有一定的差异。根据墙体竖向力的平衡确定抗倾覆验算点位置,根据墙体的变形特征,同时考虑由于基坑开挖引起的上覆有效土压力变化引入修正系数α修正墙前后土压力,推导了修正土压力模式下墙体的抗倾覆稳定计算公式,对比分析三种不同土压力模式下Kq曲线的形态特征及其影响因素,结果表明墙前后土压力修正模式更能反映实际状态下墙的倾覆失稳形态,其抗倾覆稳定系数也更加合理。
- 土压力模式 /
- 水泥土重力式围护墙 /
- 有效上覆压力 /
- 抗倾覆稳定性
Abstract: The mode of earth pressures acting on the front wall and behind the wall plays a key role in checking the anti-overturning stability of cement-soil gravity retaining wall after excavation. The curve of anti-overturning safety factor somewhat varies under different earth pressure modes. The turning point can be determined according to the balance of vertical force. In order to consider the characteristics of wall deformation and the change of effective vertical earth pressure, a coefficient is introduced to modify the earth pressure on the wall, meanwhile a formula for calculating the safety factor is proposed under the new mode. Through analysis of the morphological characteristics of the curve and the influencing factor under three different earth pressure modes, the calculated results show that the anti-overturning safety factor is more reasonable, and the modified method can better reveal the real state of wall overturning.
- earth pressure modes /
- cement-soil gravity retaining wall /
- effective vertical earth pressure /
- anti-overturning stability

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参考文献(12)

[1]	蔡建, 周健. 土的卸载抗剪强度[J]. 岩土工程学报, 2006, 28(5): 606-610. (CAI Jian, ZHOU Jian. Unloading shear strength of soils[J]. Chinese Jounal of Geotechnical Engineering, 2006, 28(5):606-610. (in Chinese))
[2]	熊巨华, 杨敏. 水泥土桩墙挡土结构抗倾覆稳定验算讨论[J]. 工业建筑, 1998, 28(5):1-4. (XIONG Ju-hua, YANG Min. Discussion on the calculation of safety factor of anti-overturn for deep-mixing-column retaining wall[J]. Industrial Construction, 1998, 28(5):1-4. (in Chinese))
[3]	孙玉永, 周顺华, 庄丽. 考虑残余应力的基坑被动区土压力及强度计算[J]. 土木工程学报, 2011, 44(7): 94-99. (SUN Yu-yong, ZHOU Shun-hua, ZHUANG Li. Calculation of passive earth pressure and shear strength in foundation pits considering residual stress[J]. China Civil Engineering Journal, 2011, 44(7): 94-99. (in Chinese))
[4]	魏纲, 郑金涛. 考虑开挖效应的基坑被动土压力计算[J].岩土工程学报, 2006, 28(增刊1): 1493-1496. (WEI Gang, ZHENG Jin-tao. Calculated method of passive earth pressure in deep pit engineering considering excavation effect[J]. Chinese Jounal of Geotechnical Engineering, 2006, 28(S1): 1493-1496. (in Chinese))
[5]	李卫超, 熊巨华, 杨敏. 分层土中水泥土围护结构抗倾覆验算方法的改进[J]. 岩土力学, 2011, 32(8): 2435-2440. (LI Wei-chao, XIONG Ju-hua, YANG Min. Improve method for calculating anti-overturning safety factor of cement-soil retaining wall in layered soil[J]. Rock and Soil Mechanics, 2011, 32(8):2435-2440. (in Chinese))
[6]	熊巨华, 杨敏. 水泥土桩墙支挡结构抗倾覆稳定验算新方法[J]. 工程勘察, 1998(3): 1-4. (XIONG Ju-hua, YANG Min. New checking technique for capsize resisting and stability of bracing structure with soil cement pile wall[J]. Geotechnical Investigation and Surveying, 1998(3): 1-4. (in Chinese))
[7]	魏汝龙. 基坑开挖与墙前土压力计算[J]. 地基处理, 1996, 7(2): 61-62. (WEI Ru-long. Deep excavation and soil pressure calculation before wall[J]. Ground Treatment, 1996, 7(2): 61-62. (in Chinese))
[8]	崔国游, 刘忠玉. 水泥土挡土墙抗倾覆稳定性分析[J]. 河南科学, 2003, 21(5): 540-542. (CUI Guo-you, LIU Zhong-yu. Analysis of overturning stability of cement-soil retaining wall[J]. Henan Science, 2003, 21(5): 540-542. (in Chinese))
[9]	李卫超, 熊巨华, 杨敏. 水泥土围护结构抗倾覆验算转点位置探讨[J]. 低温建筑技术, 2010, 32(2): 28-30. (LI Wei-chao, XIONG Ju-hua, YANG Min. Discussion on the turning point location of the cement-soil retaining wall during the anti-overturn safety factor calculation[J]. Low Temperature Architecture Technology, 2010, 32(2): 28-30. (in Chinese))
[10]	李卫超, 熊巨华, 周明琪, 等. 水泥土围护结构抗倾覆稳定验算方法的改进[J]. 结构工程师, 2010, 26(1): 87-90. (LI Wei-chao, XIONG Ju-hua, ZHOU Ming-qi, et al. Improved method to calculate anti-overturn safety factor of cement-soil retaining wall[J]. Structure Engineers, 2010, 26(1): 87-90. (in Chinese))
[11]	熊巨华, 杨敏, 冯又全. 上海市搅拌桩挡墙的稳定和位移分析及设计建议[J]. 上海地质, 1998(1): 46-50. (XIONG Ju-hua, YANG Min, FENG You-quan. Analysis on displacement and stability of DMP retaining wall and design suggestions in Shanghai City[J]. Shanghai Geology, 1998(1): 46-50. (in Chinese))
[12]	熊巨华, 裴健勇, 杨敏. 考虑桩顶冠梁效应的水泥土挡墙变形计算方法[J]. 岩土力学, 1999, 20(1): 84-86. (XIONG Ju-hua, PEI Jian-yong, YANG Min. Method for calculating deformation of DMP retaining wall considering effect of beam at the top[J]. Rock and Soil Mechanics, 1999, 20(1): 84-86. (in Chinese))