[1]郑军锋.路堤荷载下挤密螺纹桩复合地基沉降现场试验[J].福建工程学院学报,2019,17(04):307-313.[doi:10.3969/j.issn.1672-4348.2019.04.001]
　ZHENG Junfeng.Field experiment on settlement of compacted threaded pile composite foundation under embankment load[J].Journal of FuJian University of Technology,2019,17(04):307-313.[doi:10.3969/j.issn.1672-4348.2019.04.001]
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路堤荷载下挤密螺纹桩复合地基沉降现场试验()
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《福建工程学院学报》[ISSN:2097-3853/CN:35-1351/Z]

卷:
第17卷
期数:
2019年04期
页码:
307-313
栏目:
出版日期:
2019-08-25

文章信息/Info

Title:
Field experiment on settlement of compacted threaded pile composite foundation under embankment load
作者:
郑军锋
中铁二十四局集团福建铁路建设有限公司
Author(s):
ZHENG Junfeng
Fujian Railway Construction Co., Ltd., China Railway 24th Bureau Group Co., Ltd.
关键词:
挤密螺纹桩; 复合地基; 沉降; 差异沉降; 桩土应力比
Keywords:
compacted threaded pile;  composite foundation;  settlement;  differential settlement;  pile-soil stress ratio
分类号:
TU472.3
DOI:
10.3969/j.issn.1672-4348.2019.04.001
文献标志码:
A
摘要:
对新建兴泉铁路黄塘车站挤密螺纹桩复合地基的桩、土沉降及应力进行监测，分析了路堤荷载下桩、土沉降及差异沉降变化规律，桩土应力比与差异沉降关系。结果表明:桩、土沉降及差异沉降均随路堤填土高度的增加而呈线性增大；桩顶和桩间土应力随路堤填土高度的增加均不断增大，且桩顶应力大于桩间土应力；桩土应力比随着桩土差异沉降的增加先增加后减小，最终趋于稳定。结合修正的Terzaghi土拱理论提出了简化桩土应力比随桩土差异沉降变化曲线。现场试验分析结果有助于完善挤密螺纹桩复合地基设计理论，为工程实践提供一定的参考。
Abstract:
The pile and soil settlement and stress of the compacted threaded pile composite foundation of Huangtang Station of Xingquan Railway were monitored. The variation rules of pile and soil settlement and differential settlement under embankment load, and the relationship between pile-soil stress ratio and differential settlement were analyzed. Results show that pile settlement, soil settlement and differential settlement increase with the increase of embankment height and show a linear relationship. The soil stress at the top of pile and that between piles increases with the increase of embankment height, and the stress at the top of pile is larger than that between piles. With the increase of differential settlement, the pile-soil stress ratio increases at first, then decreases, and finally tends to be stable. Combined with the modified Terzaghi soil-arch theory, the simplified pile-soil stress ratio curve with pile-soil different settlement was proposed. The results of field test and analysis are helpful to improve the design theory of compacted threaded pile composite foundation and provide some references for engineering practice.

参考文献/References:

[1] 左珅, 王敏, 徐林荣, 等. 高速铁路中低压缩性土桩-筏(网)地基加固效果研究[J]. 中南大学学报(自然科学版), 2014, 45(5): 1590-1597. [2] 郝玉龙, 王立忠, 陈云敏，等. 深厚软土水泥搅拌桩复合地基沉降分析及控制[J]. 岩土工程学报, 2001, 23(3): 345-349.[3] ZHANG L, ZHAO M H, SHI C J, et al. Settlement calculation of composite foundation reinforced with stone columns[J]. International Journal of Geomechanics, 2013, 13(3): 248-256. [4] 赵明华, 牛浩懿, 刘猛, 等. 柔性基础下碎石桩复合地基桩土应力比及沉降计算[J]. 岩土工程学报, 2017, 39(9): 1549-1556.[5] ZHENG J J, ABUSHARAR S W, WANG X Z. Three-dimensional nonlinear finite element modeling of composite foundation formed by CFG-lime piles[J]. Computers and Geotechnics, 2008, 35(4): 637-643.[6] 周杨, 肖世国, 徐骏, 等. 变截面螺纹桩竖向承载特性试验研究[J]. 岩土力学, 2017, 38(3): 747-754, 783.[7] 晏莉, 阳军生, 韩杰. 桩承土工合成材料加筋垫层复合地基作用原理及应用[J]. 岩土力学, 2005, 26(5): 821-826.[8] 付强, 刘汉龙, 庄妍, 等. 高速铁路CFG桩筏复合地基沉降变形特性研究[J]. 铁道科学与工程学报, 2014, 11(6): 45-51.[9] HAN J, GABR M A. Numerical analysis ofgeosynthetic-reinforced and pile-supported earth platforms over soft soil[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2002, 128(1): 44-53.[10] YUAN M, DING J H, ZHANG P X, et al. The settlement computation of composite foundation of different typed-pile based on the load test[J]. Applied Mechanics and Materials, 2014, 490-491: 1706-1711.[11] 闫林栋, 魏丽敏, 何群. 铁路客运专线CFG桩复合地基沉降监测与分析[J]. 铁道科学与工程学报, 2010, 7(1): 42-46[12] 李善珍, 马学宁, 时瑞国. 高速铁路桩(帽)网和桩筏复合地基模型试验研究[J]. 铁道科学与工程学报, 2016, 13(4): 600-605.[13] 袁江雅. 土工格室+碎石桩复合地基承载机理研究[J]. 铁道科学与工程学报, 2009, 6(3): 17-21.[14] 章定文, 谢伟, 郑晓国. 考虑桩土非等应变的路堤荷载下搅拌桩复合地基沉降计算方法[J]. 岩土力学, 2014, 35(S2): 68-74.[15] 郭帅杰. 基于桩帽尺寸调整的桩网复合地基沉降控制方法研究[J]. 铁道标准设计, 2016(11): 5-9.[16] TERZAGHI K. Theoretical soil mechanics[M]. Hoboken, NJ, USA: John Wiley & Sons, Inc, 1943. DOI: 10.1002/9780470172766.[17] LYU W, MIAO L. Calculation method of pile-soil stress ratio of rigid pile composite foundation[J]. Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition), 2013, 43(3): 624-628.[18] 曹卫平, 胡伟伟. 桩承式加筋路堤三维土拱效应试验研究[J]. 岩土力学, 2014, 35(2): 351-358.[19] 饶为国, 赵成刚. 桩-网复合地基应力比分析与计算[J]. 土木工程学报, 2002, 35(2): 74-80.

更新日期/Last Update: 2019-08-25