土钉支护中土压力计算

杨育文

土钉支护中土压力计算 English Version

杨育文

1. 武汉市测绘研究院，湖北武汉 430000; 2. 武汉市勘测设计研究院，湖北武汉 430022

详细信息

作者简介:
杨育文(1963- )，男，湖北孝感人，博士，教授级高级工程师，从事深基坑、桩基工程理论研究以及人工智能、自动化监测技术研究与开发。E-mail: wayneywyang@163.com。

中图分类号: TU432
计量
- 文章访问数: 01136
- HTML全文浏览量: 0
- PDF下载量: 0406
出版历程
- 收稿日期: 2011-12-11
- 发布日期: 2013-01-31

New approach for determining earth pressure in soil-nailing technology

YANG Yu-wen

1. Wuhan Geomatic Institute, Wuhan 430000, China; 2. Wuhan Geotechnical Engineering and Surveying Institute, Wuhan 430022, China

摘要

摘要: 土钉墙柔性面层结构上承受的土压力既不符合传统土压力理论计算适用条件，也没有现有理论可以求解，目前大多根据工程经验确定。基于土钉技术可充分发挥土体自稳性的特点，将上限理论推导出的计算式与实测数据结合起来，得到一土压力计算方法，并应用于一复合土钉墙实例。计算土压力与实测数据相符。分析结果认为，当开挖深度超过土体的自稳高度后，土钉结构上一定承受土压力，其大小与开挖深度、坡角、土层性质、支护结构布置相关。该方法适用于土钉墙、复合土钉墙土压力计算。
- 土钉技术 /
- 土钉墙 /
- 复合土钉墙 /
- 土压力 /
- 滑动面
Abstract: The earth pressure on flexible structures in soil-nailing walls is neither in accordance with the preconditions of the traditional pressure theory, nor has suitable theories to apply. The earth pressure thus has to be evaluated by engineering experience. A new method is proposed for evaluation of the earth pressure by combining the upper bound solution with engineering data to show the characteristics in soil nailing so as to allow soil to move and mobilize the soil strength. The new method is applied to a composite wall for validation. The analytical results are found to be in agreement with the actual conditions. The earth pressure exists after the excavation depth exceeds the self-stabilizing height of the soil. Its value is related to the excavation depth, slope angle, soil properties and supporting structural settings. The proposed method is suitable for determining the earth pressure on soil-nailing walls, composite soil-nailing walls.
- soil nailing /
- soil-nailing wall /
- composite soil-nailing wall /
- earth pressure /
- slip surface

HTML全文

参考文献(13)

[1]	王步云. 土钉墙设计[J]. 岩土工程技术, 1997(4):30-41 WANG Bu-yue. Soil nailing design[J]. Geotechnical Engineering Technique, 1997(4):30-41. (in Chinese))
[2]	TB100252001,J1272001铁路路基支挡结构设计规范[S]. 2001. TB100252001, J1272001 Code for design on retaining engineering structures of railway subgrade[S]. 2002. (in Chinese))
[3]	莫暖娇. 土钉墙侧向土压力分布研究[J]. 隧道建设, 2006,26(2):1-4 MO Nuan-jiao. Research on distribution of lateral soil-pressure in soil-nailed wall[J]. Tunnel Construction, 2006,26(3):1-4. (in Chinese))
[4]	刘晓红,饶秋华. 土钉支护侧土压力合理分布模式探讨[J]. 中南公路工程, 2006,3(2):29-32 LIU Xiao-hong, RAO qiu-hua, Lateral earth pressure distribution in soil nailing, Central South Road Engineering, 2006, 3(2): 29-32. (in Chinese))(in Chinese))
[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 MA Ping, QIN Si-qing, SUN Qiang. Computation of lateral soil pressure on soil nailing wall considering cohesion force and cut slope angle[J]. Chinese Journal of Geotechnical Engineering, 2007,29(12):1888-1891. (in Chinese))
[6]	杨育文. 土钉墙中土压力探究[J]. 地下空间与工程学报, 2010,6(2):300-305 YANG Yu-wen. , Investigating the earth pressure within soil nailing walls, Chinese Journal of Underground Space and Engineering, 2010, 6(2): 300-305. (in Chinese))
[7]	朱彦鹏,叶帅华,莫庸. 青海省西宁市某深基坑事故分析[J]. 岩土工程学报, 2010,32(增刊1):404-409 ZHU Yan-peng, YE Shuai-hua, MO Yong, Analysis and treatment of a deep foundation pit accident in Xining, Qinghai Province[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(S1): 404-409. (in Chinese))
[8]	陈肇元,崔京浩,宋二祥,等. 深基坑开挖的土钉支护技术（一）构造方法[J]. 地下空间, 1995,15(4):241-249 CHEN Zhao-yuan, CAI Jing-hao, SONG Er-xiang,et al. Soil nailing in deep excavations[J]. Underground Space, 1995,15(4):241-249. (in Chinese))
[9]	杨育文,肖建华. 土体自稳坡角和土钉墙稳定机理分析[J]. 长江科学院院报, 2012,29(11):87-90 YANG Yu-wen, XIAO Jian-hua. Soil self-stabilizing angle and stability mechanism of soil nail walls[J]. Journal of Yangtze River Scientific Research Institute, 2012,29(11):87-90. (in Chinese))
[10]	蒋忠信. 边坡临界高度卡尔曼公式之工程应用[J]. 岩土工程技术, 2007,21(5):217-220 JIANG Zhogn-xing. Engineering application of Culmanns formula on critical height of slope[J]. Geotechnical Engineering Technique, 2007,21(5):217-220. (in Chinese))
[11]	陈利洲. 土钉墙的两条滑裂面成因分析[J]. 工业建筑, 2005,35(增刊):503-505 CHEN Li-zhou. Two slip surfaces in soil nailing wall[J]. Industrial Construction, 2005,35(S0):503-505. (in Chinese))
[12]	汤连生,宋明健,廖化荣,等. 预应力锚索复合土钉支护内力及变形分析[J]. 岩石力学与工程学报, 2008,27(2):410-417 TANG Lian-shegn, SONG Ming-jian, LIAO Hua-rong,et al Analysis of stress deformation of prestressed cable composite soil nailing[J],. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(2): 410-417. (in Chinese))
[13]	姚刚,刘晓纲,韩森. 超深基坑复合土钉支护结构原位试验研究[J]. 土木工程学报, 2006,39(10):92-101 YAO Gang, LIU Xiao-gang, HAN Shen. In-situ test of composite soil nailing for a deep foundation pit[J]. China Civil Engineering Journal, 2006,39(1):92-101. (in Chinese))