盾构法隧道地面沉降槽宽度系数取值的研究

魏纲

doi:10.13204/j.gyjz200912019

盾构法隧道地面沉降槽宽度系数取值的研究

doi: 10.13204/j.gyjz200912019

魏纲

1.
浙江大学城市学院土木工程系,杭州 310015

基金项目:

浙江省教育厅科研资助项目(20070180)

详细信息

作者简介:
魏纲，男，1977年6月出生，博士，副教授。E-mail:weig@zucc.edu.cn

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- 文章访问数: 140
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- 被引次数: 0
出版历程
- 收稿日期: 2009-06-08
- 刊出日期: 2009-12-20

STUDY ON CALCULATION FOR WIDTH PARAMETER OF SURFACE SETTLEMENT TROUGH INDUCED BY SHIELD TUNNEL

Wei Gang

1.
Department of Civil Engineering,City College,Zhejiang University,Hangzhou 310015,China

摘要

摘要: 盾构法隧道施工引起的地面沉降槽宽度系数i值与隧道半径R、隧道轴线埋深h及土质条件(土的内摩擦角)有关。对13例22个实测数据的统计结果表明:i值与[R+htan〔45-/2〕]值间呈线性关系,i/[R+htan〔45-/2〕]值中共有20个数据在[0.45,0.50],只有2个数据(分别为0.43和0.51)在该范围外;i与h基本呈线性关系,但离散性较大,对于黏性土,k=i/h的范围为[0.37,0.66];i/R与h/(2R)间的关系采用指数函数拟合效果比常用的幂函数要好,但参数取值范围较大。基于分析结果,提出新的i值计算公式,该公式适用于黏性土,考虑了R、h、,同时参数取值范围较小,避免经验性参数取值范围较大可能带来的误差。
- 盾构隧道 /
- 地面沉降 /
- Peck公式 /
- 沉降槽宽度系数
Abstract: The value of width parameter i of surface settlement trough induced by shield tunnel is related to tunnel radius R,tunnel axis depth h,and soil condition(internal friction angle of soil).The analyses of 22 actual values from 13 constructional cases show that value of i is linear with [R+htan〔45-/2〕].20 values of i/[R+htan〔45-/2〕] are in the range of [0.45,0.50].Only 2 values(0.43,0.51) are beyond but close to the bounds,generally within 10% difference.The values of i is linear with h,but their dispersion is great.The values of i/h are in the range of [0.37,0.66] for cohesive soil.The result shows that the contribution of relationship curve of i/R values with h/(2R) values obtained from exponential function fitting is better than that obtained from power function fitting,but the scope of empirical parameter range is large.Based on the above-mentioned results,new calculation method for i is put forward.This method is applicable in cohesive soil,and R,h and are taken into account.The possible error induced by large scope of empirical parameters range is avoided because of small parameter range in this method.
- shield tunnel /
- surface settlement /
- Peck equation /
- width parameters of settlement trough

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