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首页> 外文期刊>The Structural Design of Tall and Special Buildings >Load-sharing ratio of prebored and precast pile in top-down method construction process
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Load-sharing ratio of prebored and precast pile in top-down method construction process

机译：自顶向下法施工过程中预制桩与预制桩的荷载分担比

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摘要

The load-sharing ratio of the prebored and precast pile in top-down method foundation was investigated by using a numerical analysis and field case study. The emphasis was on quantifying the apparent load-sharing ratio of the prebored and precast pile during the top-down method construction process. A series of three-dimensional finite element analysis were conducted, with special attention given to the pile load-sharing ratio under various conditions, such as soil condition, pile geometry, pile length, and structure load. In addition, the load-sharing ratio of a single pile was also investigated based on the location of the pile in the raft (footing). The analysis model was validated by comparing the analysis model with the field data of an actual construction site using the prebored and precast pile and the top-down method. On the basis of the series of analysis results and the field measurements, when the soil condition is better than weathered rock and for moderate pile length, at least 15% of the total structure load was supported by the pile throughout the construction process. Furthermore, it was shown that the pile near the center of the raft carried more structure load compared with the piles in the side and the corner of the raft.
机译：通过数值分析和现场案例研究，研究了自上而下的地基中预钻孔桩和预制桩的荷载分担率。重点是在自上而下的方法施工过程中量化预钻孔和预制桩的表观载荷分担比。进行了一系列三维有限元分析，并特别注意了在各种条件下（如土壤条件，桩的几何形状，桩长和结构荷载）的桩荷载分担比。此外，还根据桩在筏子中的位置（立足点）研究了单桩的荷载分担比。通过使用预制桩和预制桩以及自顶向下的方法将分析模型与实际施工现场的现场数据进行比较，验证了分析模型的有效性。根据一系列分析结果和现场测量结果，当土壤条件好于风化岩石且桩长适中时，在整个施工过程中，桩至少会支撑总结构载荷的15％。此外，结果表明，与筏侧和角部的桩相比，筏中心附近的桩承受的结构载荷更大。

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