土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (2): 163-167.

• 工程实录 • 上一篇    下一篇

上海某软土区基坑工程桩基选型分析

黄 晖   

  1. （上海市地矿工程勘察（集团）有限公司,上海 200072）
  • 收稿日期:2021-09-24 修回日期:2021-10-13 出版日期:2022-04-30 发布日期:2022-04-26
  • 作者简介:黄晖（1974-），女，工程师，研究方向为岩土工程、土工试验等。

Pile Type Selection for a Foundation Project in Shanghai Soft Soils

HUANG Hui   

  1. (Shanghai Geological Engineering  Exploration （Group） Co. Ltd., Shanghai 200072)
  • Received:2021-09-24 Revised:2021-10-13 Online:2022-04-30 Published:2022-04-26

摘要： 预应力混凝土管桩具有强度高，抗弯性能好，单桩承载力高等优点，适用于多种地层，且施工周期短，对环境影响小。以上海软土区某高层建筑群工程案例为研究背景，通过地质勘察、室内土工试验等手段，研究了地基土的工程力学性质，并对桩基持力层的选择进行了分析，基于此进一步研究了PHC管桩与钻孔灌注桩对于施工案例的施工优缺点与注意事项。通过设计验算，地基承载力满足设计要求，说明PHC管桩施工是适用的，并对PHC管桩施工过程可能遇到的问题进行了分析，为软土地基区高层建筑管桩施工起到了一定的参考作用。


关键词: 软土区基坑, 管桩施工, PHC管桩

Abstract: The prestressed high-strength concrete pipe pile (PHC) has the advantages of high strength, good bending performance and high single pile axial capacity, which is suitable for subsurface conditions. It also has short construction duration and less impact on the adjacent environment. This paper presents a case of pile type selection for a high-rise building complex in Shanghai soft soils. The subsurface conditions under the project area were evaluated and pile bearing stratum was selected based on field geotechnical investigations and laboratory tests. Both advantages and disadvantages of installing PHC pile and cast-in-situ concrete pile to be applied in this project are presented in the paper. Based on the analysis, the axial analysis of both types of piles were satisfactory but the selection of the PHC pile was more appropriate.

Key words: foundation project in soft soils, pipe pile installations, PHC pipe pile

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