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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

41卷

期数:

2024年04期

页码:

151-158

栏目:

岩土工程

出版日期:

2024-07-19

文章信息/Info

Title:

Study on influence of different treatment measures for karst caves on bearing characteristics of pile foundation

文章编号:

1673-2049(2024)04-0151-08

作者:

冯忠居¹,徐博熙¹,陈慧芸¹,夏承明²,蔡 杰³

(1. 长安大学 公路学院,陕西 西安 710064; 2. 三明莆炎高速公路有限责任公司,福建 三明 365000; 3. 福建省交通建设质量安全中心,福建 福州 350001)

Author(s):

FENG Zhongju¹, XU Boxi¹, CHEN Huiyun¹, XIA Chengming², CAI Jie³

(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Sanming Puyan Highway Co. Ltd, Sanming 365000, Fujian, China; 3. Fujian Transportation Construction Quality and Safety Center, Fuzhou 350001, Fujian, China)

关键词:

岩土工程;  岩溶区;  桩基;  竖向承载特性;  回填法;  钢护筒跟进法

Keywords:

geotechnical engineering;  karst area;  pile foundation;  vertical bearing characteristic;  backfilling method;  steel casing follow-up method

分类号:

U443

DOI:

10.19815/j.jace.2022.07011

文献标志码:

A

摘要:

为探究不同溶洞处治措施对岩溶发育区桩基承载特性的影响,通过有限元软件建立溶洞-桩-岩土体耦合作用模型,对比分析溶洞高度变化情况下,2种不同的溶洞处治措施(回填法和钢护筒跟进法)对桩基承载特性的影响。结果表明:随着溶洞高度增加,2种处治措施下桩基竖向承载力都呈降低趋势; 溶洞高度小于10 m时,不同处治措施对桩基竖向承载力影响可忽略,溶洞高度大于10 m则需考虑处治措施对桩基竖向承载力的影响; 在回填法处治的溶洞范围内,桩身轴力降幅较大,桩侧摩阻力增加显著,在钢护筒跟进法处治的溶洞中桩身轴力与桩侧摩阻力则基本不变; 与钢护筒跟进法相比,回填法更有利于发挥桩侧摩阻力; 溶洞高度增加时,2种处治措施下桩侧摩阻力比重均逐渐减小,桩端阻力比重逐渐增大,达到桩基极限承载力时,回填法处治后的溶洞较钢护筒跟进法桩端阻力占整体比例更小。

Abstract:

In order to analyze the influence of different treatment measures of karst caves on the bearing characteristics of pile foundations in karst areas, a coupling model of karst caves-piles-rock and soil was established through numerical simulation. The effects of two different treatment measures backfilling method and steel casing follow-up method on the bearing characteristics of pile foundations were compared and analyzed under the condition of changing the height of karst caves height. The results show that the vertical bearing capacity of pile foundation decreases with the increase of the karst cave height under the two treatment measures. When the height of the karst cave is less than 10 m, the impact of the karst cave treatment measures on the vertical bearing capacity of the pile foundation can be ignored. When the height of the karst cave is greater than 10 m, the impact of treatment measures on the vertical bearing capacity needs to be considered. The axial force of the pile body decreases greatly and the pile side friction resistance increases significantly within the scope of the karst cave treated by the backfilling method, but it is basically unchanged in the karst cave treated by the steel casing follow-up method. Compared with steel casing follow-up method, backfilling method is more conducive to exerting the pile side friction resistance. With the increase of the height of the karst cave, the proportion of pile side friction under the two treatment measures gradually decreases, and the proportion of pile end resistance gradually increases. When the ultimate bearing capacity of the pile foundation is reached, the proportion of pile end resistance of karst cave treated by backfilling method is smaller than that of steel casing follow-up method.

参考文献/References:

[1] FENG Z J,CHEN H Y,XIA C M,et al.Prediction of bearing capacity of pile foundation in karst area based on model of metabolic GM(1,1)[J].IOP Conference Series:Earth and Environmental Science,2018,189:042012.
[2]姚宏生,冯忠居,袁 展,等.岩溶发育区特大桥梁桩基础施工技术研究[J].施工技术,2017,46(19):130-133.
YAO Hongsheng,FENG Zhongju,YUAN Zhan,et al.Large bridge pile foundation construction technology research in karst development area[J].Construction Technology,2017,46(19):130-133.
[3]郑晓慧.岩溶区桩基力学特性分析及桩型优化设计研究[J].地质与勘探,2018,54(4):824-832.
ZHENG Xiaohui.Study on mechanical properties of pile foundation and optimum design of pile types in karst areas[J].Geology and Exploration,2018,54(4):824-832.
[4]方云飞,孙宏伟,阚敦莉.唐山岩溶地区桩基工程问题分析与设计要点[J].岩土工程学报,2013,35(增2):1117-1121.
FANG Yunfei,SUN Hongwei,KAN Dunli.Analysis and design points of pile foundation engineering in Tangshan karst area[J].Chinese Journal of Geotechnical Engineering,2013,35(S2):1117-1121.
[5]WANG P S,DING H Y,ZHANG P Y.Influence of karst caves at pile side on the bearing capacity of super-long pile foundation[J].Mathematical Problems in Engineering,2020,2020:4895735.
[6]雷 勇,尹君凡,陈秋南.岩溶区桩端基岩极限承载力及破坏模式试验研究[J].应用力学学报,2017,34(4):774-780,822.
LEI Yong,YIN Junfan,CHEN Qiunan.The experimental study on limit bearing capacity and failure mode of pile end bedrock in karst region[J].Chinese Journal of Applied Mechanics,2017,34(4):774-780,822.
[7]张永杰,邓俊强,杨兴山,等.考虑溶洞空间形态的岩溶桩基稳定性分析方法[J].中国公路学报,2019,32(1):37-45.
ZHANG Yongjie,DENG Junqiang,YANG Xingshan,et al.Stability analysis method of pile foundation in karst area base on cavern spatial form[J].China Journal of Highway and Transport,2019,32(1):37-45.
[8]DONG Y X,FENG Z J,HAO Y M,et al.Bearing behaviors and reasonable rock-socketed depth of bridge pile foundation in karst areas[C]//SHEHAT H F.Proceedings of Sustainable Civil Infrastructures.Cham:Springer,2019:141-161.
[9]董芸秀,冯忠居,郝宇萌,等.岩溶区桥梁桩基承载力试验与合理嵌岩深度[J].交通运输工程学报,2018,18(6):27-36.
DONG Yunxiu,FENG Zhongju,HAO Yumeng,et al.Experiment on bearing capacity of bridge pile foundations in karst areas and reasonable rock-socketed depth[J].Journal of Traffic and Transportation Engineering,2018,18(6):27-36.
[10]冯忠居,武 敏,何静斌,等.陡坡-岩溶耦合作用下公路桥梁桩基极限承载力的计算[J].公路,2021,66(1):115-121.
FENG Zhongju,WU Min,HE Jingbin,et al.Calculation of ultimate bearing capacity of pile foundations of highway bridges under the coupling of steep slope and karst[J].Highway,2021,66(1):115-121.
[11]CHEN H Y,FENG Z J,LI T,et al.Study on the vertical bearing performance of pile across cave and sensitivity of three parameters[J].Scientific Reports,2021,11:17342.
[12]赵明华,肖 尧,徐卓君,等.基于Griffith强度准则的岩溶区桩基溶洞稳定性分析[J].中国公路学报,2018,31(1):31-37.
ZHAO Minghua,XIAO Yao,XU Zhuojun,et al.Stability analysis of cavity under rock-socketed pile in karst areas based on Griffith criterion[J].China Journal of Highway and Transport,2018,31(1):31-37.
[13]赵明华,雷 勇,张 锐.岩溶区桩基冲切破坏模式及安全厚度研究[J].岩土力学,2012,33(2):524-530.
ZHAO Minghua,LEI Yong,ZHANG Rui.Study of punching failure mode and safe thickness of pile foundation in karst region[J].Rock and Soil Mechanics,2012,33(2):524-530.
[14]夏 炼.岩溶地区桩基承载特性影响因素研究[J].公路,2018,63(11):168-171.
XIA Lian.Study on influencing factors of bearing capacity of pile foundation in karst area[J].Highway,2018,63(11):168-171.
[15]蒋武军,鄢定媛,王明明,等.特大型溶洞回填体基桩荷载-沉降规律与计算研究[J].岩土工程学报,2017,39(增2):67-70.
JIANG Wujun,YAN Dingyuan,WANG Mingming,et al.Study on load-settlement law and calculation of foundation pile of backfill body in super-large karst cave[J].Chinese Journal of Geotechnical Engineering,2017,39(S2):67-70.
[16]鲁贤成,陈 记,李云安,等.岩溶区大直径嵌岩桩荷载传递特征的数值分析[J].安全与环境工程,2019,26(1):183-190.
LU Xiancheng,CHEN Ji,LI Yunan,et al.Numerical analysis of load transfer characteristics of large diameter rock-socketed pile in karst area[J].Safety and Environmental Engineering,2019,26(1):183-190.
[17]尹凯丽,郝世龙.武汉地区岩溶对桩基承载力影响数值模拟研究[J].水文地质工程地质,2015,42(6):96-102.
YIN Kaili,HAO Shilong.A study of the effect of karst on the bearing capacity of pile foundation in Wuhan district based on numerical simulation[J].Hydrogeology & Engineering Geology,2015,42(6):96-102.
[18]李金良,邢宇铖,崔 伟,等.竖向荷载作用下岩溶区单桩承载特性研究[J].济南大学学报(自然科学版),2020,34(4):417-422.
LI Jinliang,XING Yucheng,CUI Wei,et al.Bearing characteristics of single pile under vertical load in karst area[J].Journal of University of Jinan(Science and Technology),2020,34(4):417-422.
[19]曹文贵,李 媛,翟友成.基于Info-Gap理论的基桩下伏岩溶顶板稳定性的主动分析方法[J].岩石力学与工程学报,2013,32(2):393-400.
CAO Wengui,LI Yuan,ZHAI Youcheng.Active analysis method for stability of karst roof under foundation pile based on info-gap theory[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(2):393-400.
[20]李 春.岩溶区桩基极限承载力有限元上限分析[J].中外公路,2019,39(2):28-32.
LI Chun.Finite element upper bound limit analysis of ultimate bearing capacity of pile foundation in karst area[J].Journal of China & Foreign Highway,2019,39(2):28-32.
[21]张慧乐,马 凛,张智浩,等.岩溶区嵌岩桩承载特性影响因素试验研究[J].岩土力学,2013,34(1):92-100.
ZHANG Huile,MA Lin,ZHANG Zhihao,et al.Test research on factors influencing bearing capacity of rock-socketed piles in karst area[J].Rock and Soil Mechanics,2013,34(1):92-100.

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备注/Memo

备注/Memo:

收稿日期:2023-07-12
基金项目:福建省交通科技攻关项目(201807)
作者简介:冯忠居(1965-),男,工学博士,教授,博士生导师,E-mail:ysf@gl.chd.edu.cn。

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更新日期/Last Update: 2024-07-20