上海交通大学学报 ›› 2016, Vol. 50 ›› Issue (03): 324-330.doi: 10.16183/j.cnki.jsjtu.2016.03.002

所属专题: 王建华教授学报发文专辑

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深层地下水回灌对高架桩基长期沉降的影响

黄亦章1, 史玉金1,2, 陈锦剑1, 王建华1()   

  1. 1.上海交通大学船舶海洋与建筑工程学院土木工程系,上海  200240
    2.上海市地质调查研究院,200072
  • 收稿日期:2015-01-21 出版日期:2016-03-01 发布日期:2021-06-04
  • 作者简介:黄亦章(1990-),女,上海市人,硕士生,主要研究方向为深层地下水回灌和高架变形.|王建华(联系人),男,教授,博士生导师,电话(Tel.):13916607928; E-mail: wjh417@sjtu.edu.cn.
  • 基金资助:
    国家自然科学基金项目(41330633);上海市科学技术委员会科研项目(13231200602)

Effect of Deep Underground Water Recharge on Long-Term Settlements of Pile Foundations

HUANG Yizhang1, SHI Yujin1,2, CHEN Jinjian1, WANG Jianhua1()   

  1. 1.Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China
    2.Shanghai Institute of Geological Survey, Shanghai 200072, China
  • Received:2015-01-21 Online:2016-03-01 Published:2021-06-04

摘要:

以上海地区高架道路桩基础为例,采用控制地下水流量的流-固耦合方法分析了季节性变化的地下水开采及回灌作用下的桩基长期沉降特征.数值分析表明,地下水的季节性抽灌使得高架及大地变形发生波动性变化,区域地面沉降略小于高架沉降,但变形趋势一致.采用流-固耦合方法对上海地区典型高架桩基实例进行数值模拟,所得分析结果与实测结果基本吻合,高架桩基在上部荷载和深层回灌耦合作用下出现隆沉变化,其长期沉降受深部土层隆沉位移的影响更大.通过分析回灌参数,得到深层回灌荷载影响高架桩基变形的基本规律,为高架桩基长期沉降的预测分析提供了参考.

关键词: 深层地下水回灌, 高架桩基, 流固-耦合, 长期沉降, 数值模拟

Abstract:

Artificial recharge in deep strata is an effective method to prevent land subsidence, and make the deep strata upheave to some extent. The pile foundations of elevated road are relatively deep so that the deformation of deep strata will greatly affect the elevated road. Using the numerical method, the elevated pile and the behavior of the surrounding soil at pumping and recharge loads were simulated and its deformation characteristics were discussed based on the coupled theory. The result shows that groundwater pumping can cause a large settlement of elevated road, while the artificial recharge can control the settlement effectively. Regional land subsidence is smaller than the elevated settlement, but the deformation tendency matches the elevated road well. Besides, based on an engineering project, the long-term deformation characteristic of elevated road at underground water recharge was simulated. The study shows that numerical results agree with the filed data, and the deformation characteristics of elevated piles are mainly influenced by deep strata. Using parameter analysis, the basic laws of elevated deformation were obtained, providing reference for the prediction of long-term settlement of elevated piles.

Key words: deep underground water recharge, elevated pile, fluid-solid coupling, long-term settlement, numerical method

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