[1]宋倩云,徐国兴,王翠英.考虑空间效应的基坑支护优化设计与施工[J].湖北工业大学学报,2020,(2):96-100.
 SONG Qianyun,XU Guoxing,WANG Cuiying.Optimization Design and Construction of Foundation Pit Support Considering Spatial Effect[J].,2020,(2):96-100.
点击复制

考虑空间效应的基坑支护优化设计与施工()
分享到:

《湖北工业大学学报》[ISSN:1003-4684/CN:42-1752/Z]

卷:
期数:
2020年第2期
页码:
96-100
栏目:
湖北工业大学学报
出版日期:
2020-04-30

文章信息/Info

Title:
Optimization Design and Construction of Foundation Pit Support Considering Spatial Effect
文章编号:
1003-4684(2020)02-0096-05
作者:
宋倩云1 徐国兴2 王翠英1
1 湖北工业大学土木建筑与环境学院, 湖北 武汉 430068;
2 湖北楚程岩土工程有限公司, 湖北 武汉 430300
Author(s):
SONG Qianyun1XU Guoxing2WANG Cuiying1
1 School of Civil Engin.,Architecture and Environment,Hubei Univ.of Tech.,Wuhan 430068,China;
2 Hubei Chucheng Geotechnical Engineering co. LTD, Wuhan 430300, China
关键词:
空间效应盆式开挖限时对撑变形控制
Keywords:
spatial effect basin excavation limited time support deformation control
分类号:
TU47
文献标志码:
A
摘要:
针对软土地层深基坑施工变形较大的特点,设计与施工中考虑空间尺寸效应,可有效控制基坑变形,降低造价。阐述基坑开挖的空间尺寸与抗隆起安全系数的关系,据此对基坑平面分区开挖;深基坑方案设计中考虑空间效应,采用内支撑“对撑+边桁架+局部角撑”的支护形式;并对支撑轴力、横撑水平距离及支护结构的稳定性进行了验算;开挖施工考虑空间效应,采用“盆式开挖”,遵守“平面分区,竖向分层,留土护臂,限时对撑”的施工原则;将基坑场地划分的A、B、C、D四个施工区对应的施工阶段1、2、3、4进行监测,结果表明第5 d、第10 d、第15 d和第20 d围护结构的监测值与设计预测值基本吻合。
Abstract:
Aiming at the large deformation of deep foundation pit in soft soil layer, the space size effect is considered in design and construction, which can effectively control the deformation of foundation pit and reduce the cost. In this paper, the relationship between the space size of foundation pit excavation and the anti-lifting safety factor is expounded. According to this, the foundation pit plane is excavated. The space effect is considered in the design of deep foundation pit. The inner support is used to support the support + side truss + local angle. The support axial force, horizontal distance of horizontal support and stability of supporting structure are checked; In excavation construction, the spatial effect is considered, "pot excavation" is adopted, the construction principle of "planar partition, vertical stratification, retaining arm guards and time-limited support is followed; the construction phases 1, 2, 3 and 4 corresponding to the four construction areas A, B, C and D of the foundation pit site are monitored. The results show that the monitoring values of the enclosure structure on the 5th, 10th, 15th and 20th days were basically consistent with the design prediction values.

参考文献/References:

[1]方银钢.软土地区深大基坑变形控制措施研究[J].工程技术研究,2019,4(7):13-15.
[2]贾坚.软土时空效应原理在基坑工程中的应用[J].地下空间与工程学报,2005,8(4):490-493.
[3]高文华,杨林德,沈蒲生.软土深基坑支护结构内力与变形时空效应的影响因素分析[J].土木工程学报,2001,10(5):90-96.
[4]史子庸.深基坑内支撑支护结构变形规律与优化设计研究[D].北京:中国地质大学,2018.
[5]李成巍,李伟,梁志荣.软土地区隧道两侧深基坑同步施工设计与分析[J].地下空间与工程学报,2018(S1):193-199.
[6]包宸豪.双侧深大基坑邻近既有地铁车站安全影响研究[D].北京交通大学.2016.
[7]刘国彬等,基坑工程手册[M].北京:中国建筑工业出版社,2009:711-712.

备注/Memo

备注/Memo:
[收稿日期] 2019-09-02
[第一作者] 宋倩云(1997-), 女, 湖北潜江人, 湖北工业大学硕士研究生,研究方向为深基坑工程
[通信作者] 王翠英(1965-), 女, 湖北武汉人, 湖北工业大学教授,研究方向为深基坑工程
更新日期/Last Update: 2020-05-13