| 被动区深搅桩加固对地铁深基坑变形的影响 |
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| 引用本文： | 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). |
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| 作者姓名： | 侯新宇 刘松玉 童立元 |
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| 作者单位： | 1. 东南大学交通学院,南京,210096;江苏广播电视大学建筑工程系,南京,210036
2. 东南大学交通学院,南京,210096 |
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| 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.
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| 关 键 词： | 地铁车站 深基坑 被动区加固 深搅桩 HS模型 |
Effect of deep mixing pile reinforce on deformation of deep foundation pit in metro station in passive zone |
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| 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). |
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| Authors: | Hou Xinyu Liu Songyu Tong Liyuan |
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| Institution: | 1School of Transportation;Southeast University;Nanjing 210096;China;2Department of Civil Engineering;Jiangsu Radio and Television University;Nanjing 210036;China |
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| 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 settlemen... |
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| Keywords: | metro station deep foundation pit reinforce in the passive zone deep mixing pile HS (hardening-soil) model |
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