Practical Study on Displacements of Oblique Bracing Supporting System in Excavation of Large Pit

刘裕华; 陈征宙; 毕港

doi:10.13409/j.cnki.jdpme.2011.01.017

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Practical Study on Displacements of Oblique Bracing Supporting System in Excavation of Large Pit

更新时间：2025-12-11

- Practical Study on Displacements of Oblique Bracing Supporting System in Excavation of Large Pit
- Vol. 31, Issue 1, Pages: 38-43(2011)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2011.01.017
  CLC： U753
- Published：2011
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[1]刘裕华,陈征宙,毕港.一种改进的斜支撑体系支护某超大深基坑的变形分析[J].防灾减灾工程学报,2011,31(01):38-43.

刘裕华, 陈征宙, 毕港. Practical Study on Displacements of Oblique Bracing Supporting System in Excavation of Large Pit[J]. 2011, 31(1): 38-43.
[1]刘裕华,陈征宙,毕港.一种改进的斜支撑体系支护某超大深基坑的变形分析[J].防灾减灾工程学报,2011,31(01):38-43. DOI： 10.13409/j.cnki.jdpme.2011.01.017.

刘裕华, 陈征宙, 毕港. Practical Study on Displacements of Oblique Bracing Supporting System in Excavation of Large Pit[J]. 2011, 31(1): 38-43. DOI： 10.13409/j.cnki.jdpme.2011.01.017.

摘要

济南某商业广场超过50000 m2的基坑采用一种改进的斜支撑支护体系进行支护

与普通斜支撑支护型式不同

该支护体系包括支护桩、斜撑、立柱与支撑桩。本文采用FLAC3D显式有限差分数值计算分析方法

并结合支护桩水平位移测斜数据

对该支护体系的变形特性进行分析研究

从中论证各支护单元在3个开挖阶段的运动学效应。研究结果表明

该斜支撑支护体系可以把各支护单元以及它们之间的土体充分调动起来

相互之间积极协调

以抵挡基坑开挖带来的土压力

从而减小基坑周围土体位移

保障周围道路、地下设施及周边建筑的正常运行。

Abstract

A modified oblique bracing supporting system was used in supporting construction of foundation pit for a shopping mall in Jinan city

which occupies more than 50000 m

.The oblique bracing supporting system

which is different from normal pattern

includes supporting piles

oblique bracing constructions

vertical pillars and struts.Through the analysis of explicit finite difference numerical calculation with FLAC

program

considering the results of in-situ monitoring of supporting piles

some conclusions are drawn on the displacements of the supporting system

and the effects of supporting constuctions.It indicates that the supporting constructions in the system are fully utilized to work with the soil at the bottom of pit

to resist the soil pressures caused by foundation pit excavation

and that the displacements of soil around the pit are reduced.Furthermore

the normal operation of roads

underground lines

and buildings surrounding the pit are ensured under the effective support of the system.

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references

排桩+斜支撑在某大面积基坑开挖中的受力变形性状研究 [J]. 陈长河,陈征宙,程毅,李斌. 防灾减灾工程学报 . 2009(02)

考虑时空效应的软土地区深基坑变形分析 [J]. 刘燕,刘国彬,孙晓玲,王海平. 岩土工程学报 . 2006(S1)

基坑内土体加固对围护结构变形的影响分析 [J]. 罗战友,刘薇,夏建中. 岩土工程学报 . 2006(S1)

软土深基坑考虑时空效应的空间计算分析 [J]. 范益群,孙巍,刘国彬,刘建航. 地下工程与隧道 . 1999(02)

深基坑锚拉支护体系变形控制设计理论与应用 [J]. 张钦喜,孙家乐,刘柯. 岩土工程学报 . 1999(02)

软土深基坑支撑轴力的时空效应变化规律研究 [J]. 蒋洪胜,刘国彬. 岩土工程学报 . 1998(06)

桩基工程手册[M]. 人民交通出版社 , 史佩栋, 2008

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