土钉支护结构侧压力分布规律分析

刘磊; 宋二祥

doi:10.13204/j.gyjz201112021

土钉支护结构侧压力分布规律分析

doi: 10.13204/j.gyjz201112021

刘磊,
宋二祥

1.
清华大学土木工程系,北京100084

基金项目:

十一五国家科技支撑计划项目(2008BAJ06B01-5)

详细信息

作者简介:
第一作者：刘磊, 男, 1985年出生, 硕士研究生。E-mail：liulei04205@126.com

中图分类号: TU476
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- 被引次数: 0
出版历程
- 收稿日期: 2011-06-18
- 刊出日期: 2011-12-20

ANALYSIS OF THE DISTRIBUTION OF LATERAL EARTH PRESSURE ON SOIL NAILING

1.
Department of Civil Engineering,Tsinghua University,Beijing 100084,China

摘要

摘要: 在基坑土钉支护设计中，一般用坑壁侧压力来估算土钉的间距、内力和长度，因此侧压力大小及分布的合理确定对设计有显著影响。通过应用三维非线性有限元方法，并采用能够在一定程度上反映基坑开挖过程中土体变形特点的本构模型，对土钉支护结构进行受力分析。计算分析表明：土钉支护中相应坑壁侧压力分布与经典土压力分布差别较大，其合力值在主动土压力与静止土压力之间；现行规程中建议的侧压力分布与有限元计算结果存在差异；对坑壁非竖直的情况，不同土质条件下用不同方法推导得出的侧压力折减系数与有限元结果的吻合程度有一定的差别。
- 土钉支护 /
- 坑壁侧压力 /
- 有限元分析
Abstract: In the design of soil nailing, the spacing, the force and the length of the nails are estimated according to the lateral earth pressure.So the rational value and distribution of lateral earth pressure has a significant influence on the design.A three dimensional nonlinear finite element model was employed to analyze the behaviors of soil nailing, in which the characteristics of soil under excavation was considered.The analysis results showed: the distribution of lateral earth pressure on soil nailing was different from that on rigid retaining wall, and the sum of lateral earth pressure varied from the active earth pressure and the static earth pressure;the lateral earth pressure suggested by present code was not in accordance with the results by finite element method;and the degree of agreement between the reduction coefficients method for non-vertical excavation derived by different methods and the results by finite element method was not the same for different soil.
- soil nailing /
- lateral earth pressure /
- finite element analysis

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参考文献(13)

[2] JGJ 12099建筑基坑支护技术规程[S].

莫暖娇.土钉墙侧向土压力分布研究[J].隧道建设,2006,26(3):1-4.

[3] CECS 96∶97基坑土钉支护技术规程[S].

[4] 郑京,陈耀光,秦晖.斜面土钉支护墙的土压力计算探讨[J].建筑科学,1997(5):35-38.

[5] 马平,秦四清,孙强.考虑黏聚力及放坡角度的土钉墙侧土压力计算[J].岩土工程学报,2007,29(12):1888-1891.

[6] 张明聚.土钉支护工作性能的研究[D].北京:清华大学,2000.

[7] 宋二祥,高翔,邱玥.土钉支护安全系数的强度参数折减有限元法[J].岩土工程学报,2005,27(3):258-263.

[8] 宋二祥,邱玥.基坑复合土钉支护的有限元分析[J].岩土力学,2001,22(3):241-244.

[9] Schanz T, Vermeer P A, Bonnier P G. The Hard ening-Soil?Model: Formulation and Verification [C]// Beyond 2000 in?Computational Geotechnics-10 Years of Plaxis.2000.

[10] 邱玥.基坑复合土钉支护结构的三维有限元分析[D].北京:清华大学,2001.

[11] 宋广,黄建华,宋二祥.超前微桩复合土钉支护三维非线性数值分析[J].岩土工程学报,2010,32( S1):151-155.

[12] Shen C K, Bang S, Romstad K M. et al. Field Measurements of?an Earth Support System[J]. Geotech. Eng. Division, ASCE,1981,107(12):1625-1642.

[13] 陈仲颐,周景星,王洪瑾.土力学[M].北京:清华大学出版社,1994.

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