| 卵石土地区双排桩基坑支护力学特性分析 |
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| 引用本文： | 李永奎,唐科行,谭钢.卵石土地区双排桩基坑支护力学特性分析[J].路基工程,2022,0(4):123-126. |
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| 作者姓名： | 李永奎 唐科行 谭钢 |
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| 作者单位： | 中铁二院成都勘察设计研究院有限责任公司，成都 610081 |
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| 摘 要： | 以某卵石土地区的双排桩基坑支护工程为例，以距基坑7.8 m的4种不同既有建筑地下室埋深为控制变量，运用有限元软件，研究分析新建12.0 m基坑双排桩支护结构的水平应力变化规律。结果发现:地下室埋深从0 m变化至9.0 m时，水平应力随着埋深的增加而不断减小，表明基坑设计时可考虑地下室对主动土压力的遮拦效应，可适当对主动土压力进行折减。
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| 关 键 词： | 卵石土 双排桩 既有建筑物 埋深 遮拦效应 |
| 收稿时间： | 2022-06-06 |
Mechanical Characteristics Analysis of Double-row Pile Foundation Pit Support in Pebble Soil Area |
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| Abstract: | Taking a double-row pile foundation pit support project in a pebble soil area as an example, with the burial depth of four different existing building basements at a distance of 7.8 m from the foundation pit as the control variable, the horizontal stress variation law of newly-built 12.0 m foundation pit double-row pile supporting structure is studied and analyzed by finite element software. The result found that when the burial depth of the basement changed from 0 to 9.0 m, the horizontal stress decreased continuously with the increase of the burial depth. It shows that the shielding effect of basement on active earth pressure can be considered in the design of foundation pit, i.e., active earth pressure can be appropriately reduced. |
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