悬臂式抗滑桩内力计算的“三段法”

苏爱军; 霍欣; 王杰涛; 鲁志春; 焦世杰

doi:10.11779/CJGE201803015

悬臂式抗滑桩内力计算的“三段法” English Version

1. 教育部长江三峡库区地质灾害研究中心,湖北武汉 430074;
2. 中铁第一勘察设计院集团有限公司,陕西西安 710043;
3. 武汉市政工程设计研究院有限责任公司,湖北武汉 430000;
4. 中国地质大学工程学院,湖北武汉 430074

详细信息

作者简介:
苏爱军(1962-),男,教授,硕士生导师,主要从事水库库区地质灾害勘察与防治、边坡工程治理及相关教学工作。E-mail:aijunsu@cug.edu.cn。

通讯作者:
霍欣，E-mail：huoxinhuashui@126.com

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出版历程
- 收稿日期: 2016-05-30
- 发布日期: 2018-03-24

Three-section method for calculating internal force and deformation of cantilevered anti-slide pile

1. Three Gorges Research Center for Geo-hazard, Ministry of Education, Wuhan 430074, China;
2. China Railway First Survey & Design Institute Group Co., Ltd., Xi'an 710043, China;
3. Wuhan Municipal Engineering Design and Research Institute Co., Ltd., Wuhan 430000, China;
4. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 针对现行按嵌固段和受荷段两段划分计算抗滑桩内力和位移的方法（简称“两段法”）不适应受荷段和嵌固段接触面非水平面、受荷段底面与嵌固段顶面不在同一平面的情况,根据荷载类型和作用强度的差异,将抗滑桩受荷段进一步划分为主受荷段和次受荷段（简称“三段法”）。基于抗滑桩嵌固段桩周岩土体服从文克尔（E.Winkler）假定,以悬臂式抗滑桩为例,推导了次受荷段在不受桩后推力作用和受桩后推力作用两种情况下悬臂式抗滑桩内力与位移通用计算公式,并论证了现行“两段法”只是其特解。结合具体的工程实例,抗滑桩“两段法”相较“三段法”计算出的弯矩和剪力在整个抗滑桩部分大多偏小,且偏小程度较大,尤其是在抗滑桩嵌固段;按“两段法”对抗滑桩进行设计将给工程安全带来不利的影响。
- 悬臂式抗滑桩 /
- 三段法 /
- 次受荷段 /
- 主受荷段 /
- 桩身内力 /
- 位移
Abstract: At present, the internal force and displacement of anti-slide piles are calculated on the basis of two sections: the loaded segment and the embedded segment (called "Two-section method"). However, this method does not adapt to the situation when the contact surface of the loaded segment and the embedded segment is not a horizontal plane or the bottom of the loaded segment and the top of the embedded segment are not at the same height. The loaded segment is divided into the primary loaded segment and the secondary loaded segment according to the difference of load type and intensity. The cantilevered anti-slide pile is taken as an example, and because the surrounding rock mass of the embedded segment is subjected to the E. Winkler’s assumption, the general formula for calculating the internal force and displacement is derived considering the secondary loaded segment suffering no force or suffering lateral rock-soil pressure (called "Three-section method"). It is demonstrated that the "Two-section method" is just the special case of the "Three-section method". Based on specific engineering examples, the calculated bending moment and shear force on the whole pile by the “T-section method” are mostly smaller than those by the "Three section method" and the deviation is also larger, especially for the embedded segment of anti-slide pile. Therefore, it will bring adverse effect to the engineering safety to design the anti-slide piles according to the "Two-section method".
- cantilevered anti-slide pile /
- three-section method /
- secondary loaded segment /
- primary loaded segment /
- internal force /
- deformation

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参考文献(12)

[1]	铁道部第二勘察设计院. 抗滑桩设计与计算[M]. 北京: 中国铁道出版社, 1983. (The Second Survey and Design Institute of the Ministry of Railways. Anti-slide pile’s design and calculation[M]. Beijing: China Railway Press, 1983. (in Chinese))
[2]	倪悦. 半坡抗滑桩受力特性分析[D]. 重庆: 重庆交通大学, 2013. (NI Yue.Study on stress analysis of the hemi-slope pile[D]. Chongqing: Chongqing Jaotong University, 2013. (in Chinese))
[3]	武小菲, 杨涛, 张俊云.半坡抗滑桩合理位置确定的探讨[J]. 路基工程, 2008(2): 135-136. (WU Xiao-fei, YANG Tao, ZHANG Jun-yun.Discussion on determination of reasonable position of the hemi-slope pile[J]. Subgrade Engineering, 2008(2): 135-136. (in Chinese))
[4]	许霄霄. 三峡库区秭归—巴东段顺层滑坡变形规律研究[D].武汉: 中国地质大学(武汉), 2013. (XU Xiao-xiao. The deformation rule study of bedding landslidein the area from zigui to badong segment of the three Gorges Reservoir Area[D]. Wuhan: China University of Geosciences (Wuhan), 2013. (in Chinese))
[5]	重庆市城市建设委员会. 建筑边坡工程技术规范[M]. 北京: 中国建筑工业出版社, 2013. (Chongqing Municipal Commission of Urban-rural Development. Technical code for building slope engineering[M]. Beijing: China Architecture & Building Press, 2013. (in Chinese))
[6]	湖北省三峡库区地质灾害防治工作领导小组办公室. 湖北省三峡库区滑坡防治地质勘察与治理工程技术规定(试行)(续)[J]. 湖北地矿, 2003, 17(3): 56-64. (Office of Leading Group of Geological Disaster Prevention and Control in the Three Gorges Reservoir Area of Hubei Province. Technical regulation of geological investigation and engineering design for landside control in reservoir area of three gorges in Hubei Province (Trial)[J]. Huhei Geology & Mineral Resources, 2003, 17(3): 56-64. (in Chinese))
[7]	戴自航. 抗滑桩滑坡推力和桩前滑体抗力分布规律的研究[J]. 岩石力学与工程学报, 2002, 21(4): 517-521. (DAI Zi-hang.Study on distribution laws of landslide-thrust and resistance of sliding mass acting on antislide piles[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(4): 517-521. (in Chinese))
[8]	佴磊, 马丽英, 冷曦晨, 等. 滑坡治理中的抗滑桩设计[J]. 吉林大学学报(地球科学版), 2002, 21(4): 162-165. (NIE Lei, MA Li-ying, LENG Xi-chen, et al.Anti-slide pile design in slope prevention[J]. Journal of Jilin University (Earth Science Edition), 2002, 21(4): 162-165. (in Chinese))
[9]	柴波, 殷坤龙, 肖拥军. 巴东新城区库岸斜坡软弱带特征[J]. 岩土力学, 2010, 31(8): 2501-2506. (CHAI Bo, YIN Kun-long, XIAO Yong-jun.Characteristics of weak-soft zones of Three Gorges Reservoir shoreline slope in new Badong county[J]. Rock and Soil Mechanic, 2010, 31(8): 2501-2506. (in Chinese))
[10]	李亮辉. 顺层岩质边坡软弱结构面原位剪切试验及其稳定性分析研究[D]. 武汉: 华中科技大学, 2004. (LI Liang-hui.Study on in-situ shearing testing of weak joint plane and stability of consequent rock slope[D]. Wuhan: Huazhong University of Science and Technology, 2004. (in Chinese))
[11]	陈静瑜, 赵炼恒, 李亮, 等. 折线型滑面边坡强度参数反演的极限分析上限法[J]. 中南大学学报(自然科学版), 2015, 46(2): 638-644. (CHENG Jing-yu, ZHAO Lian-heng, LI Liang, et al.Back-analysis of shear strength parameters for slope with broken line sliding surface based on upper bound approach[J]. Journal of Central South University (Science and Technology), 2015, 46(2): 638-644. (in Chinese))
[12]	张金华. 岩土体抗剪强度参数反演及滑坡灾害预测研究[D]. 重庆: 重庆交通大学河海学院, 2010. (ZHANG Jin-hua.Research on the shear strength parameters inversion of rock-soils and the prediction of landslide disaster[D]. Chongqing: Chongqing Jiaotong University, College of River and Ocean Engineering, 2010. (in Chinese))

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