陡坡段双桩-柱基础简化计算方法及影响因素分析

doi:10.16285/j.rsm.2017.06.020

›› 2017, Vol. 38 ›› Issue (6): 1705-1715.doi: 10.16285/j.rsm.2017.06.020

陡坡段双桩-柱基础简化计算方法及影响因素分析

张永杰^{1, 2}，夏旖琪²，冯夏庭¹，王桂尧²

1. 中国科学院武汉岩土力学研究所岩土力学工程国家重点实验室，湖北武汉 430071；2. 长沙理工大学土木与建筑学院，湖南长沙 410114

收稿日期:2015-09-11 出版日期:2017-06-12 发布日期:2018-06-05
作者简介:张永杰，男，1981年生，博士，副教授，主要从事边坡与隧道工程稳定可靠性分析与风险评估方面的教学与研究。
基金资助:
国家自然科学基金（No.51208063）；中国博士后科学基金项目（No.2012M511709）；湖南省教育厅优秀青年项目，中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室资助课题（No.Z013006）。

A simplified method and affecting factors for double pile-column foundation in abrupt slope

ZHANG Yong-jie^{1, 2}, XIA Yi-qi², FENG Xia-ting¹, WANG Gui-yao²

1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha, Hunan 410114, China

Received:2015-09-11 Online:2017-06-12 Published:2018-06-05
Supported by:
This work was supported by the National Natural Science Foundation of China (51208063), China Postdoctoral Science Foundation (2012M511709), Outstanding youth project of Hunan Provincial Department of Education, Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences (Z013006).

摘要/Abstract

摘要： 陡坡段双桩-柱基础与普通桩基存在较大的差异性，其承载变形特性更为复杂。首先，在探讨陡坡段双桩-柱基础承载机制的基础上，针对纵、横坡向双桩-柱基础分别提出了对应的简化分析模型；其次，基于桩侧受均布力的基桩内力变形分析方法建立出陡坡段纵、横坡向双桩-柱基础简化计算方法，并通过实例对比分析验证了该方法的可行性；然后，采用典型工程案例系统分析了桩径、滑坡体厚度、剩余下滑力集度及地基水平抗力系数的比例系数等因素对基桩桩顶水平位移与桩身最大弯矩的影响规律，结果表明，各因素对两者的影响规律相似，基桩受荷段的陡坡效应显著，而承载变形段的深度效应则不明显；最后，建议工程设计时应优先考虑增大桩径，但不宜大于2.5 m，另可调整基础位置以减小剩余下滑力的影响，进而减少工程失稳风险，而不同工况的分析结果曲线则可用于工程优化设计。

关键词: 基础工程, 双桩-柱基础, 承载机制, 简化计算方法, 敏感性分析

Abstract: There are significant differences between the double pile-column foundation and the common pile foundation in abrupt slope. And the bearing capacity and deformation behaviors of double pile-column foundations in abrupt slope are more complex. Simplified models were developed to analyze the bearing mechanism of lengthways and lateral double pile-column foundations in abrupt slope, and were derived using the internal force of common pile subjected to the horizontal uniform force applied on the shaft. The proposed model was verified and its influencing factors were analyzed by a typical engineering project, including pile diameter, sliding body thickness, residual sliding force, proportional coefficient of ground level resistance modulus, on the pile-top horizontal displacement and pile maximum bending moment. The results indicated similar impact by these factors, and salient potential sliding body on the load acting section, and subtle influence of the depth on the load bearing section. Larger pile diameters within 2.5 m are preferred to control the pile deformation and bending moment. Foundation locations can also be changed to reduce the influence of residual sliding force, and lower the instability risk of the pile-column foundation in abrupt slop. The results under different conditions imply optimization design in engineering practices.

Key words: foundation engineering, double pile-column foundation, bearing mechanism, simplified calculation method, sensitivity analysis

中图分类号:

TU 443

张永杰，夏旖琪，冯夏庭，王桂尧，. 陡坡段双桩-柱基础简化计算方法及影响因素分析[J]. , 2017, 38(6): 1705-1715.

ZHANG Yong-jie, XIA Yi-qi, FENG Xia-ting, WANG Gui-yao，. A simplified method and affecting factors for double pile-column foundation in abrupt slope[J]. , 2017, 38(6): 1705-1715.

参考文献

相关文章 15

[1]	王钦科, 马建林, 陈文龙, 杨彦鑫, 胡中波, . 上覆土嵌岩扩底桩抗拔承载特性离心模型试验及计算方法研究[J]. 岩土力学, 2019, 40(9): 3405-3415.
[2]	李瑞山, 袁晓铭. 成层场地基本周期简化计算方法研究[J]. 岩土力学, 2019, 40(8): 3227-3235.
[3]	郭重阳，李典庆，曹子君，高国辉，唐小松. 考虑空间变异性条件下的边坡稳定可靠度高效敏感性分析[J]. , 2018, 39(6): 2203-2210.
[4]	陈卫忠，马永尚，于洪丹，龚哲，李香玲，. 泥岩核废料处置库温度-渗流-应力耦合参数敏感性分析[J]. , 2018, 39(2): 407-416.
[5]	任连伟，詹俊峰，杨权威，王新泉，张敏霞，. 五星形桩截面尺寸优化及竖向承载机制试验研究[J]. , 2017, 38(10): 2855-2864.
[6]	邹飞，龙万学，李亮,. 楔形刀具侵入岩石损伤破坏影响因素的理论分析及数值模拟[J]. , 2016, 37(7): 2101-2108.
[7]	谌文武，毕骏，马亚维，刘伟，江耀, . MK模型的拟合方程和预测方程在土-水特征曲线中的应用及参数敏感性分析[J]. , 2016, 37(11): 3208-3214.
[8]	郎瑞卿，孙立强，闫澍旺，林澍，陈浩，任宇晓. PTC管桩复合地基应力扩散效应研究[J]. , 2015, 36(S2): 394-400.
[9]	雷勇，刘泽. 基于H-B准则的公路桥梁桩基嵌岩深度计算[J]. , 2015, 36(2): 457-462.
[10]	宋卫东，曹帅，付建新，江国建，吴锋，. 矿柱稳定性影响因素敏感性分析及其应用研究[J]. , 2014, 35(S1): 271-277.
[11]	李美蓉，陈媛，张林，杨宝全 , . 复杂地质条件下多结构面对重力坝坝基稳定性的影响及处理[J]. , 2014, 35(S1): 328-333.
[12]	单博，陈剑平，王清. 基于最小熵理论和未确知测度理论的泥石流敏感性分析[J]. , 2014, 35(5): 1445-1454.
[13]	王元战，贺林林，王朝阳，. 离岸深水全直桩码头动力简化计算方法研究[J]. , 2014, 35(10): 2969-2976.
[14]	王玉赞，迟世春，邵磊，杨昕光. 堆石料残余变形特性与参数敏感性分析[J]. , 2013, 34(3): 856-862.
[15]	文畅平. 多级支护边坡屈服加速度及因素敏感性分析[J]. , 2013, 34(10): 2889-2897.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

陡坡段双桩-柱基础简化计算方法及影响因素分析

A simplified method and affecting factors for double pile-column foundation in abrupt slope

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 0