Dewater Sinking Analysis of North Anchorage Caisson for the Fourth Nanjing Yangtze River Bridge

MU Bao gang; ZHU Jian min; GONG Wei ming; NIU Ya zhou

doi:10.11835/j.issn.1674-4764.2010.05.025

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Dewater Sinking Analysis of North Anchorage Caisson for the Fourth Nanjing Yangtze River Bridge

更新时间：2023-11-28

- Dewater Sinking Analysis of North Anchorage Caisson for the Fourth Nanjing Yangtze River Bridge
- Journal of Civil and Environmental Engineering Vol. 32, Issue 5, Pages: 135-141(2010)
- 作者机构：
  
  1. 东南大学土木工程学院,南京,210096
  2. 中交第二公路工程局有限公司,西安,710075
- 作者简介：
- 基金信息：
- DOI：10.11835/j.issn.1674-4764.2010.05.025
  CLC：
- Published：2010
- 稿件说明：
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MU Bao gang, ZHU Jian min, GONG Wei ming, et al. Dewater Sinking Analysis of North Anchorage Caisson for the Fourth Nanjing Yangtze River Bridge[J]. Journal of Civil and Environmental Engineering, 2010, 32(5): 135-141.
DOI：

MU Bao gang, ZHU Jian min, GONG Wei ming, et al. Dewater Sinking Analysis of North Anchorage Caisson for the Fourth Nanjing Yangtze River Bridge[J]. Journal of Civil and Environmental Engineering, 2010, 32(5): 135-141. DOI： 10.11835/j.issn.1674-4764.2010.05.025.

摘要

结合南京长江4桥北锚碇沉井的施工特点，在现场抽水试验基础上，综合确定了沉井排水下沉期间的渗透系数，由此理论计算单井出水量、总涌水量等并进行排水设计，实际涌水量略大于理论值；根据有效应力原理，认为沉井降水对潜水含水层的影响很小，沉降主要由承压水含水层压缩引起，由此得到的沉降曲线与实测结果总体吻合较好。

Abstract

Combined with construction of north anchorage caisson

field pumping tests were carried out. Permeability coefficient was acquired for dewater sinking. Water yield of single well and total water inflow of caisson excavation were calculated. It is found that the measured amount of total water inflow is slightly larger than the theoretical value. Based on effective stress principle

the compression of phreatic water aquifer caused by dewater is almost negligible，and the ground settlement is mainly composed of confined water aquifer compression. The calculated settlement curve along the levee was in good agreement with the measured data.

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