特大型溶洞回填体基桩荷载-沉降规律与计算研究

蒋武军; 鄢定媛; 王明明; 李煜; 陈骅伟; 蒋冲; 陈兆

doi:10.11779/CJGE2017S2017

特大型溶洞回填体基桩荷载-沉降规律与计算研究 English Version

1. 湖南省高速公路建设开发总公司,湖南长沙 410000;
2. 湖南省交通规划勘察设计院,湖南长沙 410008;
3. 中南大学资源与安全工程学院,湖南长沙 410083

基金项目: 国家自然科学基金项目（51478479,51678570）; 湖南省交通科技项目（201524）

详细信息

作者简介:
蒋武军(1975- ),男,高级工程师,主要从事岩土与隧道工程研究。E-mail：nba_freeman@163.com。

通讯作者:
蒋冲，E-mail：jiang4107@sohu.com

计量
- 文章访问数: 358
- HTML全文浏览量: 3
- PDF下载量: 204
出版历程
- 收稿日期: 2017-08-01
- 发布日期: 2017-12-19

Load-settlement rules and calculation of foundation piles in karst cave

1. Hunan Province Highway Construction Development Corporation, Changsha 410000, China;
2. Hunan Provincial Communications Planning Survey & Design Institute, Changsha 410008, China;
3. School of Resources and Safety Engineering, Central South University, Changsha 410083, China

摘要

摘要: 为研究特大型岩溶地区回填体特性对桩基础荷载传递的影响,提高岩溶桩基的安全性与经济性,本文考虑特大型岩溶地区桩周回填体与基桩协调变形产生侧摩阻力的特性,基于指数荷载传递函数,获得了特大型岩溶地区回填体基桩荷载-沉降曲线计算方法,并结合现有研究成果与工程实例对该计算方法进行验证,结果表明本文方法与实际工程的结果很吻合,在此方法的基础上,分析各参数对岩溶桩基荷载-沉降曲线的影响,分析结果表明：桩基的荷载-沉降曲线随着轴向应变、碎石粒径与桩参数α_s的变化而变化,桩基的极限承载力随着轴向应变与桩参数α_s的增加而增加,随着碎石粒径的增加反而减小。
- 回填体 /
- 荷载传递 /
- 极限承载力 /
- 参数分析
Abstract: In order to study the influence of the backfill characteristics of the large karst area on the load transfer of the pile foundation and to improve the safety and economy, considering the characteristics of the side friction resistance of the pile back and the pile in the large karst area, based on the exponential load transfer function, the method for calculating the load-settlement curves of backfill piles in large karst area is obtained. The method is verified by the existing research results and engineering examples. The results show that the proposed method is in good agreement with the actual project. Based on this method, the influence of parameters on the load- settlement curves of karst piles is analyzed. The results show that the load-settlement curves of pile foundation increase with the axial strain, particle size of gravel and pile parameter α_b, and the ultimate bearing capacity of the piles increases with the increase of the axial strain and pile parameter α_s and decreases with the increase of the particle size of gravel.
- backfill /
- load transfer method /
- ultimate bearing capacity /
- parameter analysis

HTML全文

参考文献(11)

[1]	蔡登山, 王邦楣. 岩溶地区钻孔桩受力机理研究[J]. 桥梁建设, 2002(6): 16-19. (CAI Deng-shan, WANG Bang-mei. Study on mechanical behavior of bored pile in karst area[J]. Bridge Construction, 2002(6): 16-19. (in Chinese))
[2]	赵明华, 曹文贵, 何鹏祥, 等. 岩溶及采空区桥梁基桩桩端岩层安全厚度研究[J]. 岩土力学, 2004, 25(1): 64-68. (ZHAO Minghua, CAO Wen-gui HE Peng-xiang, et al. Karst and mined area pilethickness of end formations security[J]. Soil Mechanics, 2004, 25(1): 64-68. (in Chinese))
[3]	赵明华, 蒋冲, 曹文贵. 岩溶区嵌岩桩承载力及其下伏溶洞顶板安全厚度的研究[J]. 岩土工程学报, 2009, 29(2): 306-307. (ZHAO Ming-hua, JIANG Chong, CAO Wen-gui. Study on bearing capacity of rock-socketed piles in karst area and safety thickness of lower cave roof[J]. Journal of Geotechnical Engineering, 2009, 29(2): 306-307. (in Chinese))
[4]	赵明华, 邹新军, 刘齐建. 洞庭湖软土地区大直径超长灌注桩竖向承载力试验研究[J]. 土木工程学报, 2004, 37(10): 63-67. (ZHAO Ming-hua, ZOU Xin-jun, LIU Qi-jian. Experimental study on vertical bearing capacity of large diameter super-long pile in soft soil area of Dongting Lake[J]. Chinese Journal of Civil Engineering, 2004, 37(10): 63-67. (in Chinese))
[5]	赵明华, 胡倩, 杨超炜, 等. 考虑地基土非线性固结的桩侧负摩阻力计算方法研究[J]. 岩土工程学报, 2016, 38(8): 1417-1424. (ZHAO Ming-hua, HU Qian, YANG Chao-wei, et al. Study on calculation method of negative friction resistance of pile side considering non-linear consolidation of foundation soil[J]. Journal of Geotechnical Engineering, 2016, 38(8): 1417-1424. (in Chinese))
[6]	SEED H B, REESE L C. The action of soft clay along friction piles[J]. Transactions of the American Society of Civil Engineers, 1900, 122:731-754.
[7]	LEGRAND S, FRANK R, HABERT J, et al. Model factor for the bearing capacity of piles from pressuremeter test results - Eurocode 7 approach[J]. Géotechnique, 2014, 64: 513-525.
[8]	NANDA S, PATRA N R. Theoretical load-transfer curves along piles considering soil nonlinearity[J]. Journal of Geotechnical & Geoenvironmental Engineering, 2014, 140(1): 91-101.
[9]	XIAO H B, LUO Q Z, TANG J, et al. Prediction of load-settlement relationship for large‐diameter piles[J]. Structural Design of Tall Buildings, 2002, 11(4): 285-293.
[10]	CARRUBBA P. Skin friction on large-diameter piles socketed into rock[J]. Canadian Geotechnical Journal, 1997, 34(2): 230-240.
[11]	张振南, 茅献彪, 郭广礼. 松散岩块压实变形模量的试验研究[J]. 岩石力学与工程学报, 2003, 22(4): 578-581. (ZHANG Zhen-nan, MAO Xian-biao, GUO Guang-li. Experimental study on compaction modulus of loose rock mass[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(4): 578-581. (in Chinese))

施引文献(3)

期刊类型引用(2)

1.	李璋，白森，郑建国，于永堂，朱才辉. 基坑开挖对西安黄土地层中既有盾构隧道围岩压力及变形影响分析. 隧道与地下工程灾害防治. 2025(01): 35-47 . 百度学术
2.	于琳. 湿陷性软土路基变形加固施工技术及沉降规律研究. 交通世界. 2025(07): 74-77 . 百度学术