| 刘日成.深基坑双排桩结构支护效果有限差分数值模拟[J].地质与勘探,2012,48(2):1900-12-31-373 |
| 深基坑双排桩结构支护效果有限差分数值模拟 |
| Finite Difference Numerical Simulation of a Foundation Pit Supported by Double-row Piles |
| 投稿时间：2011-07-03 修订日期：2011-12-24 |
| DOI： |
| 中文关键词: 双排桩 桩土接触面 实体单元桩 结构单元桩 |
| 英文关键词: supporting structure with double-row piles, interaction between soil and pile, entity unit pile, structural unit pile |
| 基金项目:国家自然科学基金国际合作与交流项目(No. 50820135907);国家自然科学基金青年科学基金(No. 50909056)和青年科学基金
项目(51109209)联合资助 |
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| 中文摘要: |
| [摘 要] 由两排平行的钢筋混凝土桩以及桩顶冠梁形成的双排桩支护结构可以有效控制基坑侧
向变形,被广泛应用于基坑支护设计中。本文以济南市西区文化中心项目大剧院为工程背景,对双排桩
支护结构下基坑坡面水平位移,坑底隆起,桩身弯矩、剪力,桩土接触面切向刚度和法向刚度等特征进行
研究,并通过“实体单元桩冶和“结构单元桩冶的计算结果进行对比分析。研究表明,桩与土体相互作用
力学模型能较好模拟双排桩支护施工过程,计算精度较高;桩顶的水平位移最大,基坑开挖底面的弯矩
和剪力最大;计算结果可为双排支护桩作用机理的研究提供参考。 |
| 英文摘要: |
| Abstract:The supporting structure with double-row piles and top beams can control deformation of foundation pits in constructions efficiently. Therefore, this technique is widely used in the supporting design of foundation pits. This work was based on the ground theatre project of Cultural Center in the west district of Jinan City and used finite difference simulation to analyze some features of the foundation pit supported by the technique aforementioned. The calculation results were compared between the two types of piles, i. e. “entity unit pile"and “structural unit pile". The result shows that the model considering interaction between soil and pile can simulate the whole process of double-row supporting piles very well, and can get a very high computational accuracy. The maximum horizontal displacement occurs on the top of the pile, while the maximum bending moment and shear stress appear in the bottom of excavation part. The result can provide reference to the research of the mechanism of double-row supporting piles. |
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