[1]李方明,高波,朱利明,等.软土层地连墙施工对邻近浅基础房屋影响研究[J].自然灾害学报,2018,(01):081-87.[doi:10.13577/j.jnd.2018.0110]
 LI Fangming,GAO Bo,ZHU Liming,et al.Study on the influence of diaphragm wall construction of soft soil ground on adjacent shallow foundation building[J].,2018,(01):081-87.[doi:10.13577/j.jnd.2018.0110]
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软土层地连墙施工对邻近浅基础房屋影响研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年01期
页码:
081-87
栏目:
出版日期:
2018-02-28

文章信息/Info

Title:
Study on the influence of diaphragm wall construction of soft soil ground on adjacent shallow foundation building
作者:
李方明13 高波2 朱利明3 陈国兴3 刘雪珠4
1. 中国地震局工程力学研究所, 黑龙江 哈尔滨 150080;
2. 南京地铁建设有限责任公司, 江苏 南京 210000;
3. 南京工业大学 岩土工程研究所, 江苏 南京 210009;
4. 江苏省岩土工程公司, 江苏 南京 210018
Author(s):
LI Fangming13 GAO Bo2 ZHU Liming3 CHEN Guoxing3 LIU Xuezhu4
1. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China;
2. Nanjing Metro Construction Limited Liability Company, Nanjing 210000, China;
3. Institute of Geotechnical Engineering, Nanjing Tech. University, Nanjing 210009, China;
4. Geotechnical Engineering Company of Jiangsu Province, Nanjing 210018, China
关键词:
地下连续墙浅基础房屋沉降不均匀沉降剪应力
Keywords:
diaphragm wallshallow foundation buildingsettlementdifferential settlementshearing stress
分类号:
X9;X43;TU4
DOI:
10.13577/j.jnd.2018.0110
摘要:
以深厚软土层地下连续墙施工对邻近浅基础房屋的影响为研究对象,采用数值模拟计算房屋长期沉降,并与实测值对比分析,通过房屋不均匀沉降引起的结构内力变化,判断房屋安全性。结果表明:(1)房屋长期沉降由地连墙成槽土体损失、超孔压消散土体固结和土骨架蠕变引起的,其沉降是长期的;(2)房屋的沉降主要为工后沉降,施工阶段房屋沉降较小,仅为455 d沉降量的15%,软土变形有较大的滞后性;(3)软土层中地连墙施工引起的房屋沉降,在施工阶段采用HS硬化土模型,工后采用SSC蠕变模型,模拟计算结果与实测值较为接近;(4)剪应力最大值主要集中在沉降较大部位附近,部分横墙剪应力超过砂浆抗剪强度,需要对相应墙体进行加固。
Abstract:
The influence of diaphragm wall construction in deep soft soil on adjacent shallow foundation building is studied, and the numerical simulation is used to calculate the long-term settlement of buildings and compared with the measured value, through the change of the structure internal force caused by uneven settlement of the building, the security of the building is judged. The results showed that:(1) The settlement of the building is long term, which is caused by the loss of the soil under the diaphragm wall, the excess pore pressure dissipation, the consolidation of soil and the creep of the soil skeleton.(2) The settlement of the building is mainly the post construction settlement, and the settlement of the building in the construction stage is smaller, which is only 15% of the 455D settlement, and the deformation of the soft soil has a great hysteresis;(3) settlement of building caused by diaphragm wall in soft soil layer, the HS hardening soil model is adopted in the construction stage, and the SSC creep model is adopted after the work, the simulation result is close to the measured value;(4) the maximum shear stress is mainly concentrated near the larger part of the settlement, and the shear stress of some transverse walls exceeds the shear strength of mortar, so it is necessary to reinforce the corresponding wall.

参考文献/References:

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相似文献/References:

[1]黄明,江松,钟祖良,等.考虑时间及位移相关土压力的地下连续墙成槽变形分析[J].自然灾害学报,2017,(05):198.[doi:10.13577/j.jnd.2017.0523]
 HUANG Ming,JIANG Song,ZHONG Zuliang,et al.Deformation analysis of the trenching construction of diaphram wall considering time and displacement related soil pressure[J].,2017,(01):198.[doi:10.13577/j.jnd.2017.0523]

备注/Memo

备注/Memo:
收稿日期:2017-05-26;改回日期:2017-07-23。
基金项目:江苏省地质矿产勘查局基金项目(2015-KY-11)
作者简介:李方明(1975-),男,高工,博士,主要从事地下工程防灾减灾、桥隧与古建筑结构检测和加固工作.E-mail:184323102@qq.com
更新日期/Last Update: 1900-01-01