地连墙内撑支护体系支撑有效刚度计算方法

兰州理工大学学报 ›› 2024, Vol. 50 ›› Issue (5): 126-132.

地连墙内撑支护体系支撑有效刚度计算方法

郭雪源¹, 张明聚², 武立伟^*1

1.华北理工大学建筑工程学院, 河北唐山 063000;
2.北京工业大学北京城市交通协同创新中心, 北京 100124

收稿日期:2021-03-25 出版日期:2024-10-28 发布日期:2024-10-31
通讯作者: 武立伟(1987-),男,河北唐山人,博士,副教授.Email:wulw@ncst.edu.cn
基金资助:
国家自然科学基金(51978018),河北省自然科学基金(E2022209060),中央引导地方科技发展资金项目(226Z4502G),唐山市科技计划项目(22150224J)

An effective stiffness calculation method of the inner-bracing in the system of diaphragm walls

GUO Xue-yuan¹, ZHANG Ming-ju², WU Li-wei¹

1. College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan 063000, China;
2. Beijing Collaborative Innovation Center for Metropolitan Transportation, Beijing University of Technology, Beijing 100124, China

Received:2021-03-25 Online:2024-10-28 Published:2024-10-31

摘要/Abstract

摘要： 针对地连墙内撑支护体系,综合考虑内支撑的初始挠曲、支撑杆件压弯二阶效应、支撑与地连墙的相互作用和地连墙变形等因素,建立内支撑的有效刚度计算方法.以北京地铁某车站基坑工程为背景,在ABAQUS有限元建模中分别引入现行规范支撑刚度和支撑有效刚度,进行基坑开挖与支护的数值模拟,并将模拟结果与实测结果进行对比分析.研究结果表明:内支撑有效刚度计算方法能更真实地反映基坑支护体系的实际受力、变形状态.

关键词: 基坑工程, 地连墙, 内支撑, 内支撑刚度, 有效刚度

Abstract: Considering the effects of various factors on inner-bracing stiffness, including the initial deflection, the second-order effect of compression and bending in the inner-bracing, the interaction between the inner-bracing and diaphragm wall, the deformation of diaphragm wall, etc., an effective stiffness calculation method for the inner-bracing was put forward for diaphragm wall and inner-bracing system. Taking the excavation engineering of a Beijing subway station project as a case study, the excavation process was simulated with ABAQUS finite element software, incorporating both the current standard support stiffness and the effective support stiffness. The simulation results were then compared with the measured data. The results show thateffective stiffness calculation method for the inner-bracing accords with the real force and deformation state of the foundation pit support system.

Key words: excavation engineering, diaphragm walls, inner-bracing, inner-bracing stiffness, effective stiffness

中图分类号:

TU924

郭雪源, 张明聚, 武立伟. 地连墙内撑支护体系支撑有效刚度计算方法[J]. 兰州理工大学学报, 2024, 50(5): 126-132.

GUO Xue-yuan, ZHANG Ming-ju, WU Li-wei. An effective stiffness calculation method of the inner-bracing in the system of diaphragm walls[J]. Journal of Lanzhou University of Technology, 2024, 50(5): 126-132.

参考文献

[1] 金雪莲,樊有维,李春忠,等.带撑式基坑支护结构变形影响因素分析[J].岩石力学与工程学报,2007,26(S1):3242-3249.
[2] 孙树林,吴绍明,裴洪军.多层支撑深基坑变形数值模拟正交试验设计研究[J].岩土力学,2005,26(11):80-83.
[3] 《中国公路学报》编辑部.中国隧道工程学术研究综述2015[J].中国公路学报,2015,28(5):1-65.
[4] CLOUGH G W,DUNCAN J W.Finite element analyses of retaining wall behavior[J].Journal of the Soil Mechanics and Foundations Division, 1971,97(12):1657-1673.
[5] 黄凯,应宏伟,谢康和.深基坑圈梁与支护桩的相互作用分析[J].岩石力学与工程学报,2003,22(3):481-486.
[6] 陈书申.围护桩顶部位移特征及内支撑刚度公式辨异[J].福州大学学报(自然科学版),2001,5:93-96.
[7] 盛春陵,余巍,李仁民.深弹性支点法中m值迭代计算方法[J].河海大学学报(自然科学版),2015,43(1):44-48.
[8] 杨敏,熊巨华.建筑基坑支撑结构体系水平刚度系数的计算[J].岩土工程技术,1999,1(1):14-17.
[9] 杨学林,施祖元,益德清.带撑支护结构受力计算[J].建筑结构,2000,(30)5:36-39.
[10] 顾汉梁,张昌权,范益群,等.软土地基深基坑围护结构的空间子结构分析[J].土木工程学报,2000,33(3):78-83.
[11] 陆培毅,刘畅,顾晓鲁.深基坑支护结构支撑系统简化空间分析方法的研究[J].岩土工程学报,2002,24(4):471-474.
[12] 蒋波,楼东浩,郭跃.环形支撑体系在深基坑工程的应用与研究[J].岩土工程学报,2012,34(S1):427-431.
[13] 上海市城乡建设和交通委员会.基坑工程技术规范:DBJ 08-61-2010[S].上海:上海市建筑建材业市场管理总站,2010.
[14] 朱照宏.路面力学计算[M].北京:人民交通出版社,1985.
[15] LANDAU L D,LIFSCHITZ E M.Theory of elasticity[M].3rd.Oxford:Pergamon Press,1999.
[16] RANDOLPH M F,WORTH C P.Application of the failure state in undrained simple shear to the shaft capacity of driven piles[J].Geotechnique,1981,31(1):143-157.