Centrifuge Model Test of Soft Soil for Pile-Net Composite Foundation with Overlying Sloping Base Reinforced by Inclined Piles

doi:10.11908/j.issn.0253-374x.19504

Home > Archive>Volume 48, Issue 7, 2020 >953-961. DOI:10.11908/j.issn.0253-374x.19504

Centrifuge Model Test of Soft Soil for Pile-Net Composite Foundation with Overlying Sloping Base Reinforced by Inclined Piles
DOI:
                        10.11908/j.issn.0253-374x.19504
                    
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Author:
                        BI Junwei1,2BI Junwei
College of Civil Engineering, Tongji University, Shanghai 200092, China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China
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GAO Guangyun1,2GAO Guangyun
College of Civil Engineering, Tongji University, Shanghai 200092, China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China
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ZHANG Jianjing3ZHANG Jianjing
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
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Affiliation:1.College of Civil Engineering, Tongji University, Shanghai 200092, China;2.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;3.School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
Clc Number:TU441
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Abstract:

Two geotechnical centrifuge model tests with a similar ratio of 1:100 were performed to investigate the reinforcement effect of inclined piles for the existing pile-net composite foundation on soft soil overlying sloping base. The test results show that due to the reinforcement of inclined piles, the post construction displacement (vertical and horizontal) on the top of the embankment is reduced effectively and the development of the settlement difference on both sides of the embankment top can also be controlled. Meanwhile, reinforced by the inclined piles, the horizontal and vertical displacement of the pile top of the slope pile and friction pile in the existing composite foundation can be restrained effectively, and the damage of the geogrid and the generation and development of the asymmetrical “basin” settlement of the composite foundation can be prevented. In addition, the horizontal thrust in the existing composite foundation can be reduced and the stiffness and stability of the foundation can be improved significantly by inclined pile reinforcement. The research shows that the inclined pile is an effective measure to reinforce the existing pile-net composite foundation on soft soil overlying sloping base.

Key words:inclined piles;overlying sloping base;soft soil;pile-net composite foundation;geotechnical centrifuge model test

Reference

[1] KITAZUME M, MARUYAMA K. Internal stability of group column type deep mixing improved ground under embankment loading[J]. Soils and Foundations, 2007, 47(3): 437.

[2] 郑刚，李帅，刁珏. 刚性桩复合地基支承路堤稳定破坏机理的离心模型试验[J]. 岩土工程学报, 2012, 34(11): 1977.

[3] ANJANA B, RAJAGOPAL K. Numerical study of basal reinforced embankments supported on floating/end bearing piles considering pole-soil interaction[J]. Geotextiles and Geomembranes, 2015, 43(6): 524.

[4] 刘晋南，蒋鑫，邱延峻. 路堤荷载作用下斜坡软弱地基变形耦合特性研究[J]. 铁道学报, 2015, 37(4): 94.

[5] 顾行文，黄炜旺，谭祥韶，等. 基底倾斜的管桩复合地基路堤破坏模式研究[J]. 岩土工程学报, 2017, 39(S1): 204.

[6] 毕俊伟，高广运，张建经．下覆倾斜地层软土桩?网复合地基破坏机理试验[J]．哈尔滨工业大学学报, 2020, 52(2): 1.

[7] ARULRAJAH A, ABDULLAH A, BO M W, et al. Ground improvement techniques for railway embankments[J]. Ground Improvement, 2009, 162(1): 3.

[8] PAULSSON B, EKBERG A. Results to exemplify the joint EU project INNOTRACK: innovative track systems[J]. Proceedings of the Institution of Mechanical Engineers： Part F Journal of Rail & Rapid Transit, 2010, 224(1): 1.

[9] 陈学喜，吴玉哲，杨昊天，等. 斜向高压旋喷桩加固既有铁路路基设计参数的取值[J]. 铁道建筑, 2016(12): 60.

[10] 于贵，李星，舒中文，等. 灰土桩加固既有铁路路基关键技术研究[J]. 铁道工程学报, 2018, 35(11): 1.

[11] 吴邦颖，张师德，陈绪禄，等. 软土地基处理[M]. 北京：中国铁道出版社, 1995.

[12] 杜延龄. 土工离心模型试验基本原理及其若干基本模拟技术研究[J]. 水利学报, 1993, 8: 19.

[13] 向科，罗凤. 土工离心模型试验中的加筋材料[J]. 地下空间与工程学报, 2007, 3(5): 889.

[14] 徐光明，章为民. 离心模型中的粒径效应和边界效应研究[J]. 岩土工程学报, 1996, 18(3): 80.

[15] 中华人民共和国国家铁路局. 铁路路基设计规范: TB10001―2016[S]. 北京：中国铁道出版社, 2017.

[16] DOANH BUI PHU ，罗强，张良，等. 基于离心模型试验的高强度桩复合地基桩间距效应分析[J]. 铁道学报, 2009, 31(6): 69.

[17] 王炳龙，宫全美，周顺华，等. 砂井联合超载预压控制软土地基路基工后沉降的优化设计[J]. 铁道学报, 2004, 26(6): 75.

[18] 中华人民共和国国家铁路局. 高速铁路设计规范：TB 10621-2014[S]. 北京: 中国铁道出版社, 2015.

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BI Junwei, GAO Guangyun, ZHANG Jianjing. Centrifuge Model Test of Soft Soil for Pile-Net Composite Foundation with Overlying Sloping Base Reinforced by Inclined Piles[J].同济大学学报(自然科学版),2020,48(7):953~961

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Received:December 02,2019
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Online: August 04,2020
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