Study on countermeasures and genetic analysis of sloping bridge pile hole wall failure

Authors

YANG Hua, CCCC Railway (Wuhan) Construction Science and Technology Co., Ltd., Wuhan, Hubei 430071, China
YIN Xiaotao, State Key Laboratory of Geomechanics and Geotechnical Engineering, Wuhan Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China

Abstract

The stability of slopes and the safety of bridge piles are interdependent, and ensuring the safety of sloping terrain is crucial for the safe construction of bridge piles. Based on three collapsed pile sections of the Huadizhai No. 2 Bridge, this paper utilized geological surveys to design initial terrain and altered terrain slope stability calculation conditions, along with horizontal compensation force calculation conditions under a safety standard of 1.35. By integrating geological analysis, slope stability assessment, and compensation force evaluations, the causes of pile hole collapse and corresponding countermeasures were analyzed. The results show that under the initial terrain, the slopes of the three collapsed pile sections ranged from unstable to relatively stable. After altering the terrain with waste fill, the slopes became relatively stable, with required horizontal compensation forces under a safety factor of 1.35 as follows: K32+973 (4,667 kN/m) > K33+053 (1,478 kN/m) > K32+733 (815 kN/m). The primary cause of pile hole collapse was slope deformation induced by waste fill in gravel soil layers. Secondary factors included the poor bonding and low vertical stability of thick gravel soil layers. The severity of collapses was consistent with the compensation force ranking: K32+973 (severe) > K33+053 (moderate) > K32+733 (mild). The disturbed upper 20 m soil layer of the pile could not support loads effectively, requiring recalibration of effective pile length. Vertical load-bearing characteristics were altered, necessitating reinforcement using anti-slide piles before bridge pile construction. For the K32+973 section, one row of three anti-slide piles was placed on the inner and outer sides of the slope near the pier. For the K33+053 and K32+733 sections, only one row of three anti-slide piles on the slope’s inner side was needed. Deep slope displacement monitoring and structural internal force monitoring for the three problematic pile sections should be enhanced to assess slope reinforcement effectiveness and ensure bridge pile structural safety.

Publication Date

5-11-2023

DOI

10.14048/j.issn.1671-2579.2023.02.020

First Page

112

Last Page

116

Submission Date

March 2025

Recommended Citation

Hua, YANG and Xiaotao, YIN (2023) "Study on countermeasures and genetic analysis of sloping bridge pile hole wall failure," Journal of China & Foreign Highway: Vol. 43: Iss. 2, Article 20.
DOI: 10.14048/j.issn.1671-2579.2023.02.020
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss2/20

Reference

[1] 缪林昌, 周贻鑫, 李植淮, 等. 中美欧规范桩基承载力计算设计对比[J]. 中外公路, 2016, 36(1): 77-81. MIAO Linchang, ZHOU Yixin, LI Zhihuai, et al. Comparison of calculation and design of bearing capacity of pile foundation in Chinese, American and European codes[J]. Journal of China & Foreign Highway, 2016, 36(1): 77-81. [2] 戴国亮, 龚维明, 程晔, 等. 深长嵌岩桩承载力计算方法研究[J]. 岩石力学与工程学报, 2011, 30(S2): 4019-4024. DAI Guoliang, GONG Weiming, CHENG Ye, et al. Study of calculating methods for bearing capacity of deep-rock-socketed pile[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(S2): 4019-4024. [3] 冯国军. 摩擦桩竖向承载力计算方法研究[J]. 铁道工程学报, 2007, 24(2): 65-68, 99. FENG Guojun. Research on computing method for vertical bearing capacity of friction pile foundation[J]. Journal of Railway Engineering Society, 2007, 24(2): 65-68, 99. [4] 李杰, 朱勤. 桩基等代计算中的比拟杆件法[J]. 中外公路, 2002, 22(4):48-50. LI Jie, ZHU Qin. Analogue bar method in equivalent calculation of pile foundation[J]. Journal of China & Foreign Highway, 2002, 22(4):48-50. [5] 姚泽良. 竖向荷载作用下单桩极限承载力计算方法的研究[D]. 西安: 西安理工大学, 2003. YAO Zeliang. Study on calculation method of ultimate bearing capacity of single pile under vertical load[D]. Xi’an: Xi’an University of Technology, 2003. [6] 李程, 戴公连. 高边坡摩擦桩承载能力的数值分析[J]. 中外公路, 2008, 28(1):28-32. LI Cheng, DAI Gonglian. Numerical analysis of bearing capacity of friction pile on high slope[J]. Journal of China & Foreign Highway, 2008, 28(1):28-32. [7] 于德顺. 建筑岩质边坡桩基受力特性及边坡稳定性分析[D]. 重庆: 重庆大学, 2018. YU Deshun. Mechanical characteristics and slope stability analysis of pile foundation of building rock slope[D]. Chongqing: Chongqing University, 2018. [8] 廖睿. 陡坡与桥梁桩基相互影响及稳定性分析[D]. 赣州: 江西理工大学, 2017. LIAO Rui. Interaction between steep slope and bridge pile foundation and stability analysis[D]. Ganzhou: Jiangxi University of Science and Technology, 2017. [9] 谢方臣, 吴维义, 金昶睿. 高陡斜坡条件下桥梁桩基数值分析[J]. 交通科技, 2019, 29(6):52-56. XIE Fangchen, WU Weiyi, JIN Changrui. Numerical analysis of bridge pile foundation under high and steep slope conditions[J]. Transportation Science & Technology, 2019, 29(6):52-56. [10] 姚竞. 桥梁桩基受邻近开挖影响的数值模拟研究[J]. 安徽建筑, 2014, 21(3): 119-120, 124. YAO Jing. Research on numerical simulation of influence of bridge pile foundation caused by adjacent excavation[J]. Anhui Architecture, 2014, 21(3): 119-120, 124. [11] 唐志, 龙万学, 杜镔, 等. 贵州山区高速公路复杂地质条件桥梁基础设计[J]. 中外公路, 2014, 34(5):138-142. TANG Zhi, LONG Wanxue, DU Bin, et al. Bridge foundation design of expressway in Guizhou mountainous area under complicated geological conditions[J]. Journal of China & Foreign Highway, 2014, 34(5):138-142. [12] 龙刚, 宣以琼. 高压旋喷桩在桥梁桩基加固工程中的应用[J]. 安徽建筑工业学院学报(自然科学版), 2010, 18(3): 55-58. LONG Gang, XUAN Yiqiong. The application of high pressure revolving spraying piles in the project of Bridge pile reinforcement[J]. Journal of Anhui Institute of Architecture & Industry (Natural Science), 2010, 18(3): 55-58. [13] 曾波. 石灰岩地区桥梁桩基的施工[J]. 中外公路, 2003, 23(5): 35-36. ZENG Bo. Construction of bridge pile foundation in limestone area[J]. Journal of China & Foreign Highway, 2003, 23(5): 35-36. [14] 于丽莉, 胡长远, 常浩. 复合注浆法加固桩基础作用机理研究[J]. 水利与建筑工程学报, 2008, 6(3): 107-108, 116. YU Lili, HU Changyuan, CHANG Hao. Research on action machanism for pile foundation reinforcement with composite grouting method[J]. Journal of Water Resources and Architectural Engineering, 2008, 6(3): 107-108, 116. [15] 敬静, 饶秋华, 刘利松. 节理岩质边坡桩基加固的稳定性分析[J]. 中南大学学报(自然科学版), 2014, 45(8): 2774-2780. JING Jing, RAO Qiuhua, LIU Lisong. Stability analysis of jointed rock slope reinforced by pile foundation[J]. Journal of Central South University (Science and Technology), 2014, 45(8): 2774-2780. [16] 余继东, 马炽藩, 汪益敏, 等. 陡坡地段桥梁桩基的施工监测和有限元分析[J]. 公路, 2006, 51(7): 100-104. YU Jidong, MA Chifan, WANG Yimin, et al. Construction monitoring and FEM analyses of bridge pile bottom constructed in steep slopes[J]. Highway, 2006, 51(7): 100-104. [17] 严飞淞, 汪益敏, 陈页开. 陡坡地段公路桥梁桩基施工现场监测与性状分析[J]. 勘察科学技术, 2006(3): 28-31. YAN Feisong, WANG Yimin, CHEN (XieYe)(Kai). Analyses and monitoring of highway bridge piles constructed on steep slopes[J]. Site Investigation Science and Technology, 2006(3): 28-31. [18] 田帅帅, 任伟新, 李星新. 箱梁桥大跨钻孔桩现浇支架计算与施工监控[J]. 中外公路, 2015, 35(6): 190-194. TIAN Shuaishuai, REN Weixin, LI Xingxin. Calculation and construction monitoring of cast-in-place support for long-span bored pile of box girder bridge[J]. Journal of China & Foreign Highway, 2015, 35(6): 190-194.