设计、施工、监测

粉土地基地下分段管廊的不均匀变形计算

  • 刘永 ,
  • 柴少强 ,
  • 王福来 ,
  • 辛剑 ,
  • 邹坤壹
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  • 1.中交一公局第七工程有限公司,郑州 451450;
    2.重庆交通大学 河海学院,重庆 400074
刘永(1987—),男,黑龙江巴彦县人,高级工程师,主要从事岩土工程、地下工程等领域的工作。E-mail:623231010@qq.com

收稿日期: 2024-12-01

  网络出版日期: 2025-10-17

基金资助

中交一公局科技项目(KJYF-2024-7GS-CG04)

Calculation of Non-uniform Deformation of Segmented Pipe Gallery under Silt Soil Base

  • Liu Yong ,
  • Chai Shaoqiang ,
  • Wang Fulai ,
  • Xin Jian ,
  • Zou Kunyi
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  • 1. CCCC No. 7 Engineering Co., Ltd., Zhengzhou 451450, P.R. China;
    2. College of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, P.R. China

Received date: 2024-12-01

  Online published: 2025-10-17

摘要

针对船闸荷载作用下分段管涵的沉降变形问题,基于文卡尔弹性地基梁理论,建立了管涵沉降分析模型,并结合“管涵+天然地基”仿真模型分析了粉土地基长管涵结构变形规律,提出了分段管涵的不均匀沉降计算修正模型。结果表明:管涵在不均匀荷载作用下,受荷箱体沉降最大,相邻箱体会产生不均匀沉降,引起箱体结构缝的沉降差,沉降量和沉降差随着不均匀荷载的增大而增大;基于弹性地基梁的管涵沉降分析模型仅能用于弹性地基,修正后的管涵不均匀沉降分析模型可以评价大变形粉土地基下的管涵沉降和结构缝沉降差;结合滨海粉土地基的管涵沉降控制指标,确定了管涵上覆荷载的允许荷载;管涵上覆荷载不宜大于65.4 kPa,管涵之间的不均匀荷载不宜大于59.6 kPa。研究结果可为软土地区薄管涵的沉降预测和安全控制提供技术支撑。

本文引用格式

刘永 , 柴少强 , 王福来 , 辛剑 , 邹坤壹 . 粉土地基地下分段管廊的不均匀变形计算[J]. 地下空间与工程学报, 2025 , 21(5) : 1670 -1676 . DOI: 10.20174/j.JUSE.2025.05.22

Abstract

Aiming at the settlement and deformation problem of segmental pipe gallery under lock loading, based on the theory of Winkler elastic foundation beam, a pipe gallery settlement analysis model is established, and the deformation law of long pipe gallery structure on silt ground is analyzed by combining with the simulation model of "pipe culvert + natural foundation", so as to put forward a correction model for the calculation of uneven settlement of segmental pipe culvert. The results shows that: Under the action of uneven load, the loaded box body of pipe culvert experiences the most settlement, and the neighboring boxes produce uneven settlement, causing the settlement difference of the structural joints of the box body. The settlement amount and the settlement difference increase with the increase of uneven load. The pipe culvert settlement analysis model based on elastic foundation beam can only be used for elastic foundation, and the modified pipe culvert uneven settlement analysis model can evaluate the pipe culvert settlement and the settlement difference of structural joints under the large deformation pulverized ground foundation; Combined with the control indexes of pipe culvert settlement in coastal pulverized ground foundation, the permissible load of the pipe culvert overlay load is determined. The overlying load of pipe culvert should not be greater than 65.4 kPa, and the uneven load between pipe culverts should not be greater than 59.6 kPa. The results can provide technical support for the settlement prediction and safety control of thin pipe culverts in soft soil areas.

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