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考虑桩侧土体三维效应和地基剪切变形的隧道开挖对邻近桩基影响分析

张治国, 徐晨, 宫剑飞

张治国, 徐晨, 宫剑飞. 考虑桩侧土体三维效应和地基剪切变形的隧道开挖对邻近桩基影响分析[J]. 岩土工程学报, 2016, 38(5): 846-856. DOI: 10.11779/CJGE201605010
引用本文: 张治国, 徐晨, 宫剑飞. 考虑桩侧土体三维效应和地基剪切变形的隧道开挖对邻近桩基影响分析[J]. 岩土工程学报, 2016, 38(5): 846-856. DOI: 10.11779/CJGE201605010
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ZHANG Zhi-guo, XU Chen, GONG Jian-fei. Influence of tunneling on deflection of adjacent piles considering shearing deformation of foundation and 3D effects of lateral soils beside piles[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(5): 846-856. DOI: 10.11779/CJGE201605010
Citation: ZHANG Zhi-guo, XU Chen, GONG Jian-fei. Influence of tunneling on deflection of adjacent piles considering shearing deformation of foundation and 3D effects of lateral soils beside piles[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(5): 846-856. DOI: 10.11779/CJGE201605010
shu

考虑桩侧土体三维效应和地基剪切变形的隧道开挖对邻近桩基影响分析  English Version

  • 1. 上海理工大学环境与建筑学院,上海 200093;
    2. 重庆交通大学山区桥梁与隧道工程国家重点实验室培育基地,重庆 400074;
    3. 中国建筑科学研究院建筑安全与环境国家重点实验室,北京 100013

基金项目: 国家自然科学基金项目（51008188）; 上海自然科学基金项目（15ZR1429400）; 山区桥梁与隧道工程国家重点实验室培育基地课题（CQSLBF-Y15-1）; 建筑安全与环境国家重点实验室课题（BSBE2015-01）
详细信息
    作者简介:

    张治国(1978- ),男,河北秦皇岛人,博士后,博士,副教授,主要从事地下工程施工影响方面的研究与教学工作。E-mail: zgzhang@usst.edu.cn。

  • 中图分类号: TU47

Influence of tunneling on deflection of adjacent piles considering shearing deformation of foundation and 3D effects of lateral soils beside piles

  • 1. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China;
    2. State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
    3. State Key Laboratory of Building Safety and Environment, China Academy of Building Research, Beijing 100013, China

摘要

    摘要
  • 摘要: 目前就隧道开挖对桩基变形影响的解析理论研究一般基于Winkler地基模型,较少考虑地基的剪切变形和桩侧土体三维作用效应。基于Pasternak地基模型,首先推导了隧道开挖与邻近桩基相互作用的简化理论解,该解反映了地基剪切变形但未考虑桩侧土体三维作用效应。在此基础上,为反映桩侧土体三维作用效应,将其等效成集中力通过剪切层传递到桩基两侧,推导了体现三维作用效应的群桩反应表达式。将考虑与不考虑桩侧土体三维作用效应的结果进行对比,发现考虑桩侧土体三维作用效应的桩基水平位移和弯矩值更接近监测数据和离心试验数据。此外,还针对群桩影响因素进行了分析。结果表明：土体剪切变形对桩基影响不容忽视,剪切层模量越大,隧道开挖引起的桩身水平位移越小;桩径越大,桩身水平位移越小,桩身弯矩越大;桩基与隧道距离越小,桩基最大水平位移和弯矩值越大。
    Abstract: At present, the studies on pile deformation caused by tunneling are generally based on the Winkler foundation model. Few investigations are conducted on the shearing deformation of foundation and the 3D effects of lateral soils beside piles. Based on the Pasternak foundation model, firstly, the analytical solution of tunnel-pile interaction is derived. It reflects the effects of shearing deformation of foundation, but the 3D effects of lateral soils beside the piles are not considered. On this basis, the equivalent concentrated forces are supplied to the pile through the shear layer considering the 3D effects of lateral soils beside the piles. The expressions for lateral displacements and bending moments of pile groups are derived. The calculated results are compared with those without consideration of 3D effects of lateral soils beside the piles. It is found that the results considering effects of lateral soils beside the piles are closer to the monitoring data and centrifuge test data. In addition, the influencing factors of pile groups are investigated. The results show that the effects of soil shearing deformation on the pile deformation should not be ignored. With the decrease of foundation shear modulus, the lateral displacements of piles decrease. With the increase of the pile diameter, pile displacements decrease but the bending moments increase. The maximum lateral displacements and bending moments of piles increase with the decrease of pile-tunnel distance.
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    • 参考文献(28)
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  • 收稿日期:  2015-04-26
  • 发布日期:  2016-05-24

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