[1]侯新宇,刘松玉,童立元.被动区深搅桩加固对地铁深基坑变形的影响[J].东南大学学报(自然科学版),2010,40(1):180-184.[doi:10.3969/j.issn.1001-0505.2010.01.034]
 Hou Xinyu,Liu Songyu,Tong Liyuan.Effect of deep mixing pile reinforce on deformation of deep foundation pit in metro station in passive zone[J].Journal of Southeast University (Natural Science Edition),2010,40(1):180-184.[doi:10.3969/j.issn.1001-0505.2010.01.034]
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被动区深搅桩加固对地铁深基坑变形的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
40
期数:
2010年第1期
页码:
180-184
栏目:
交通运输工程
出版日期:
2010-01-20

文章信息/Info

Title:
Effect of deep mixing pile reinforce on deformation of deep foundation pit in metro station in passive zone
作者:
侯新宇12 刘松玉1 童立元1
1 东南大学交通学院, 南京 210096; 2 江苏广播电视大学建筑工程系,南京 210036
Author(s):
Hou Xinyu12 Liu Songyu1 Tong Liyuan1
1 School of Transportation, Southeast University, Nanjing 210096,China
2 Department of Civil Engineering, Jiangsu Radio and Television University, Nanjing 210036, China
关键词:
地铁车站 深基坑 被动区加固 深搅桩 HS模型
Keywords:
metro station deep foundation pit reinforce in the passive zone deep mixing pile HS(hardening-soil)model
分类号:
U231.4
DOI:
10.3969/j.issn.1001-0505.2010.01.034
摘要:
采用土体卸载条件下的HS(hardening-soil)有限元模型,分析了被动区加固对地铁换乘站深基坑变形的影响.结果表明:深搅加固对墙体侧向位移的影响随深度增加而增大,可以最终减小墙体侧向位移达27%左右; 在临近墙体局部范围内抑制坑底隆起效果显著,抑制隆起量最多超过50%; 对墙背土体沉降抑制不显著,局部降低15%左右,在墙背局部范围内对土体侧向位移影响不明显.因此,根据不同地质条件和基坑变形控制要求,选择合理的加固形式使加固土体达到设计强度,既能保证基坑安全和环境影响的要求,又能节省造价.
Abstract:
Adopting hardening-soil finite element model based on unloading, the influence of bottom soil on deformation of the pit was studied. The results show that the reinforcing influence on lateral deformation increases with the increasing of the excavating depth, with reinforcing the final lateral deformation can be reduced 27%. This effect is prominent for controlling the uplift in bottom soil around retaining structure, and the utmost inhibition of uplift may exceed 50%. The influence of reinforce on soil settlement behind the retaining structure is inconspicuous, being reduced about 15% in local zone. And there is little influence on the lateral deformation of the soil behind the retaining structure in local zone. Therefore, selecting a rational reinforcing form based on difference geological conditions and deformation requirements is needed to make the reinforced soil intensity reach the design demand, which can not only guarantee the pit safety and environment influencing, but also save the engineering cost.

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备注/Memo

备注/Memo:
作者简介: 侯新宇(1975—),男,博士生; 刘松玉(联系人),男,博士,教授,博士生导师,liusy@seu.edu.cn.
引文格式: 侯新宇,刘松玉,童立元.被动区深搅桩加固对地铁深基坑变形的影响[J].东南大学学报:自然科学版,2010,40(1):180-184. [doi:10.3969/j.issn.1001-0505.2010.01.034]
更新日期/Last Update: 2010-01-20