佛山东平广场坑边逆作深基坑变形数值分析

白成生

佛山东平广场坑边逆作深基坑变形数值分析 English Version

白成生

(佛山市建筑工程质量监督站，广东佛山 528000)

详细信息

作者简介:
白成生(1973– )，男，河南南阳人，硕士，高级工程师，从事建筑工程质量监督方面的工作。

中图分类号: TU473
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- 文章访问数: 1200
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- PDF下载量: 513
出版历程
- 收稿日期: 2012-11-12
- 发布日期: 2012-11-12

Numerical analysis of deformation of excavation of Foshan Dongping Plaza using edge top-down construction method

BAI Cheng-sheng

(Foshan Construction Engineering Quality Supervision Station, Foshan 528000, China)

摘要

摘要: 基坑坑边逆作时内部结构尚未构成整体，所能提供的抗侧力是影响基坑变形的关键因素。结合佛山东平广场深基坑坑边逆作的初步设计，并考虑深厚软土的力学特性，采用硬化土(HS)材料，建立三维有限元模型，分析并对比了坑内抗侧墙为1排、2排、3排及简化逆作楼板外侧端部固支等4种情况下基坑的变形及抗侧墙的应力分布。结果表明，与1排抗侧墙相比，采用2排、3排抗侧墙时，连续墙水平位移及墙后地面沉降可减小约20%、30%，而简化各层逆作楼板末端为固支，计算得出的连续墙侧移及地面沉降明显偏小，增加了工程的风险。根据计算结果，对深化设计提出了一些建议。
- 坑边逆作法 /
- 抗侧墙 /
- 变形 /
- 应力分布 /
- 硬化土模型 /
- 有限元
Abstract: For the deformation of excavations using the edge top-down construction method, the resisting lateral force provided by the inner structure is the key factor during the construction period. Combined with a practical project, a 3D finite element model is simulated and analyzed. Considering the mechanical properties of deep soft soils, the hardening-soil (HS) model is used. The deformation, ground settlement and stress distribution of the resisting lateral walls are analyzed and compared under four cases: the inner resisting lateral walls for one, two, three rows and the top-down floors fixed support at the end. The results show that compared with those of one row of the resisting lateral walls, the horizontal displacement of diaphragm wall and the settlement of ground with two and three rows of resisting lateral walls can be reduced by approximately 20% and 30%, and they are obviously smaller in the case of the top-down floors fixed support at the end, which increases the risk of engineering. According to the calculated results, some suggestions are given to optimize the design.
- edge top-down construction method /
- resisting lateral wall /
- deformation /
- stress distribution /
- HS model /
- FEM

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参考文献(8)

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[4]	徐军. 集合“顺作”与“逆作”优点的“半逆作”法工艺设计及施工探讨[J]. 建筑施工, 2004, 26(4): 286–288. (XU Jun. Study of design and construction with semi-reversed construction method combined with advantages of normal and reversed construction method[J]. Building Construction, 2004, 26(4): 286–288. (in Chinese))
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文章访问数: 1200
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佛山东平广场坑边逆作深基坑变形数值分析 English Version

作者简介: 白成生(1973– )，男，河南南阳人，硕士，高级工程师，从事建筑工程质量监督方面的工作。

计量

出版历程

Numerical analysis of deformation of excavation of Foshan Dongping Plaza using edge top-down construction method

计量

出版历程

目录

作者简介:
白成生(1973– )，男，河南南阳人，硕士，高级工程师，从事建筑工程质量监督方面的工作。