|本期目录/Table of Contents|

[1]胡文杰,徐洪钟.城市隧道基坑地下连续墙变形特性研究[J].南京工业大学学报(自然科学版),2015,37(04):97-103.[doi:10.3969/j.issn.1671-7627.2015.04.017]
 HU Wenjie,XU Hongzhong.Characteristic of diaphragm wall deflection due to deep excavation of municipal tunnel[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2015,37(04):97-103.[doi:10.3969/j.issn.1671-7627.2015.04.017]
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城市隧道基坑地下连续墙变形特性研究()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
37
期数:
2015年04期
页码:
97-103
栏目:
出版日期:
2015-07-09

文章信息/Info

Title:
Characteristic of diaphragm wall deflection due to deep excavation of municipal tunnel
文章编号:
1671-7627(2015)04-0097-07
作者:
胡文杰徐洪钟
南京工业大学 交通学院,江苏 南京 210009
Author(s):
HU WenjieXU Hongzhong
College of Transportation Science & Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
城市隧道深基坑 地下连续墙最大侧移 监测 KJHH模型
Keywords:
deep foundation pit the maximum wall deflection monitoring KJHH model
分类号:
TU472
DOI:
10.3969/j.issn.1671-7627.2015.04.017
文献标志码:
A
摘要:
为了研究城市隧道深基坑开挖引起的地下连续墙墙体变形规律,对南京纬三路过江通道工程隧道基坑监测结果进行了以下几方面的统计分析:基坑开挖引起的墙体侧移的时空变化特征,墙体最大侧移位置的特征,有支撑开挖下地下连续墙最大侧移简易预估模型(KJHH)对地下连续墙最大侧移进行预估的实用性。研究表明:随着基坑开挖深度的增加,地下连续墙变形逐渐变为明显的“胀肚型”,平均值为0.144%He(He为基坑开挖深度),最大侧移随着开挖深度的增加而增大; 地下连续墙最大侧移埋深出现在开挖面稍下一点位置,产生这一现象的主要原因是本基坑中淤泥质黏土软弱土层一般处于开挖深度的中上部,开挖这些土层会在开挖面产生较大的变形; 采用KJHH简易模型预估得到的地下连续墙最大侧移和实测值接近,说明KJHH简易模型可以有效地预估本工程地下连续墙的最大侧移。
Abstract:
In order to clarify the law of wall deflection due to deep excavation of city tunnel.The pit monitoring results of Nanjing Wei Three-Road river tunnel foundation pit were analyzed as follows:the characteristics of temporal and spatial variation of wall deflection caused by excavation of foundation pit,the maximum deflection of wall,and the utility of simplified model to estimate the maximum deflection of wall(KJHH).The results show that with the increase of the depth of excavation,the wall deflection gradually shaped into a bulging belly type, with a mean value of about 0.144%He(He is the excavation depth); Moreover then increased with the increase of the excavation depth. The maximum wall deflection position mainly on excavation face was slightly below to the point position.The main reason of this phenomenon was the silt clay soft soil layer usually is located the upper part of the depth of excavation,excavation of these soil can produce large deflection in excavation face. The predicted values of KJHH simplified model are very close to the observation values.The result proves that the KJHH simplified model can effectively predict the maximum wall deflection.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2014-09-27
基金项目:“十二五”国家科技支撑计划(2012BAJ06B04); 江苏省青蓝工程
作者简介:胡文杰(1989—),男,湖南衡阳人,硕士,主要研究方向为岩土与地下工程; 徐洪钟(联系人),教授,E-mail:hzhxu@163.com.
引用本文:胡文杰,徐洪钟.城市隧道基坑地下连续墙变形特性研究[J].南京工业大学学报:自然科学版,2015,37(4):97-103..
更新日期/Last Update: 2015-07-08