Journal of Jilin University(Earth Science Edition) ›› 2017, Vol. 47 ›› Issue (3): 818-825.doi: 10.13278/j.cnki.jjuese.201703202

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Settlement Characteristics of Composite Foundation Reinforced by Flexible Piles with Lateral Restraint

Wu Youping1,2, Zhang Keneng1,2, Liu Jie3, He Jie3   

  1. 1. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;
    2. Key Laboratory of Non-Ferrous Resources and Geological Hazard Detection, Hunan Province, Changsha 410083, China;
    3. School of Civil Engineering, Hunan University of Technology, Zhuzhou 412008, Hunan, China
  • Received:2016-09-11 Online:2017-05-26 Published:2017-05-26
  • Supported by:
    Supported by National Natural Science Foundation of China (51078140, 51108176)

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Abstract: Lateral restraint technique can effectively reduce the ground settlement during the treatment practice of soft soil foundation. Based on the characteristics of road engineering and engineering properties of soft soil, the effect of lateral restraint (pile) on the settlement of composite foundation reinforced by flexible pile (rammed soil-cement pile) was studied by means of model experiment and numerical simulation. Furthermore, the changing patterns of pile and soil settlement with the loading level were analyzed, and the influence of soil modulus and pile spacing on foundation settlement was discussed taking the lateral restraint condition into consideration. The results revealed that when lateral restraint piles were applied to the composite foundation reinforced by flexible pile, the pile spacing of 2d (d is pile diameter) and 3d both reduced the pile settlement effectively if soil compression modulus was low; as the soil compression modulus increased, the settlement reducing effects decreased when pile spacing was 3d, and it increased when pile spacing was 2d, while the settlement reducing effects can hardly be observed when pile spacing was 4d. However, as the piles spacing was 2d and 3d, the reducing effect to soil settlement decreased first and then increased; when pile spacing of 4d was applied, the reduced amount of the settlement was around 4%-5%. Therefore, a reasonable setting of lateral restraint pile was required for effectively restricting the lateral extrusion of soft soil, and consequently reducing the settlement of composite foundation.

Key words: lateral restraint, composite foundation reinforced by flexible pile, settlement, settlement ratio

CLC Number: 

  • TU477
[1] 刘峰,范炳娟,张彤. 柔性桩处理高铁路基在沈丹客专中的应用分析[J]. 筑路机械与施工机械化, 2013, 30(11): 104-106. Liu Feng, Fan Bingjuan, Zhang Tong. Analysis on Subgrade Treatment of Shenyang-Dandong Passenger Dedicated Line with Flexible Piles [J]. Bridge and Tunnel Construction and Machinery, 2013, 30(11): 104-106.
[2] 曾长贤,程寅,吴大龙,等. 高速铁路上覆厚砂层下卧厚淤泥层地基不同处理方法的加固效果对比[J]. 中国铁道科学, 2014, 35(4): 1-8. Zeng Changxian, Cheng Yin, Wu Dalong, et al. Comparison of Different Foundation Treatment Effects on Thick Sand Overlying Thick Silt Foundation of High Speed Railway [J]. China Railway Science, 2014, 35(4): 1-8.
[3] 铁路客运网. 2015年铁路新开工项目[EB/OL]. (2015-04-10). http://www.zgtlky.com/bencandy.php? fid= 47&id=72741. Railway Passenger Network. New Railway Project in 2015[EB/OL]. (2015-04-10).http://www.zgtlky.com/bencandy.php?fid=47&id=72741.
[4] Tavenas F, Leroueil S. Effects of Stresses and Time on Yielding of Clays[J]. Jpn Soc of Soil Mech and Found Eng, 1977, 1:319-326.
[5] Handy R L. Does Lateral Stress Really Influence Sett-lement[J]. Geotechnical & Geoenvironmental Engineering, 2001, 127(7): 623-626.
[6] 王志亮,李永池,殷宗泽.考虑土体侧胀性的路堤沉降计算探讨[J]. 岩石力学与工程学报,2005,24(10): 1772-1777. Wang Zhiliang, Li Yongchi, Yin Zongze. Discussion on Settlement Calculation of Embankment Considering Lateral Dilation Behavior of Soil[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(10): 1772-1777.
[7] 王峰,金武,王宏坤,等. 考虑侧向变形影响的客运专线路基沉降的修正[J]. 岩土工程学报,2010,32(增刊2): 245-248. Wang Feng, Jin Wu, Wang Hongkun, et al. Amendment of Subgrade Settlement of Passenger Dedicated Line Considering the Lateral Deformation Effects [J]. Chinese Journal of Geotechnical Engineering, 2010, 32(Sup. 2): 245-248.
[8] 卢萌盟,谢康和,李传勋,等. 考虑桩土侧向变形的复合地基固结解[J]. 岩土工程学报, 2011, 33(2): 181-187. Lu Mengmeng, Xie Kanghe, Li Chuanxun, et al. Analytical Solution for Consolidation of Composite Ground Considering Lateral Deformations of Column and Surrounding Soil [J]. Chinese Journal of Geotechnical Engineering, 2011, 33(2): 181-187.
[9] Loganathan N, Balasubramaniam A S, Bergado D T. Deformation Analysis of Embankments[J]. Geotechnical Engineering, 1993,119(8): 1185-1206.
[10] 韩君良,赵岩. 高路堤侧向位移沉降特性分析[J]. 武汉理工大学学报(交通科学与工程版), 2012, 36(1): 165-167. Han Junliang, Zhao Yan. Analysis on the Settlement Characteristic of Lateral Displacement of the High Embankment[J]. Journal of Wuhan University of Technology (Transportation Science & Engineering), 2012, 36(1): 165-167.
[11] 刘杰,何杰,谭谨. 柔性桩复合地基中软土侧向挤出的影响因素[J]. 中南大学学报(自然科学版),2014,45(7): 2333-2338. Liu Jie, He Jie, Tan Jin. Influencing Factors of Lateral Extrusion on Soft Soil in Composite Foundation with Flexible Columns[J]. Journal of Central South University (Science and Technology), 2014, 45(7): 2333-2338.
[12] 吴保全. 粉土中格栅结构复合地基的原理与技术方法研究[D]. 成都:成都理工大学,2008. Wu Baoquan. Study on the Principles and Technical Methods for Grid Composite Foundation in Silt [D]. Chengdu: Chengdu University of Technology, 2008.
[13] 柏松平,陈兴培,李勇林. 侧向限制法软土处理技术研究[J]. 公路,2005(7): 127-130. Bai Songping, Chen Xingpei, Li Yonglin. Study of Soft Soil Treatment Technology of Lateral Restraint [J]. Highway, 2005 (7): 127-130.
[14] 吴有平,刘杰,何杰. 水泥土桩应力测试方法与试验[J]. 湖南工业大学学报,2012,26(1): 23-26. Wu Youping, Liu Jie, He Jie. Experiment and Study on the Stress Testing of Cement-Soil Piles [J]. Journal of Hunan University of Technology, 2012, 26(1): 23-26.
[15] 王常明, 常高奇, 吴谦, 等. 静压管桩桩-土作用机制及其竖向承载力确定方法[J]. 吉林大学学报(地球科学版), 2016, 46(3): 805-813. Wang Changming, Chang Gaoqi, Wu Qian, et al. Pile-Soil Interaction Mechanism and a Method to Determine Vertical Bearing Capacity of Prestressed Concrete Pipe Pile[J]. Journal of Jilin University (Earth Science Edition), 2016, 46(3): 805-813.
[16] 朱小军,龚维明,赵学亮,等. 垫层土拱效应试验与计算方法[J]. 东南大学学报(自然科学版),2013,43(5): 957-961. Zhu Xiaojun, Gong Weiming, Zhao Xueliang, et al. Experiment and Calculation Methods of Soil Arching in Cushion[J]. Journal of Southeast University (Natural Science Edition), 2013, 43(5): 957-961.
[17] 王立明. 有支点柔性支护结构主动区土压力和增强机理研究[D]. 上海:同济大学,2007. Wang Liming. The Research on Earth Pressure an Reinforced Mechanism in the Active Area behind Propped Flexible Retaining Walls[D]. Shanghai: Tongji University, 2007.
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