土工基础

›› 2017, Vol. 31 ›› Issue (3): 330-334.

• 工程实录 • 上一篇    下一篇

PHC管桩复合地基抗液化能力研究

文 蛟   

  1. （武汉铁四院工程咨询有限公司 地下工程所，武汉 430063）
  • 收稿日期:2017-02-17 修回日期:2017-02-27 出版日期:2017-06-25 发布日期:2017-06-26
  • 作者简介:文 蛟(1986-)，男，工程师，研究方向为地下工程设计及科研等。

Application of PHC Pipe Piles in Liquefied Soils

WEN Jiao   

  1. (Underground Engineering Institute, Wuhan Siyuan Engineering Consulting Co. Ltd., Wuhan 430063)
  • Received:2017-02-17 Revised:2017-02-27 Online:2017-06-25 Published:2017-06-26

摘要： 为研究PHC管桩处理可液化地基的效果，结合工程实例，采用FLAC3D数值模拟软件研究PHC管桩复合地基受地震荷载作用下的抗液化特性，并就灌注桩与PHC管桩的加固效果进行了对比研究。研究结果表明， PHC管桩复合地基的抗液化能力较未加固地基大幅提高，在同一地震荷载下，PHC管桩复合地基的液化度为0.20，而未加固地基液化度为0.48；此外，根据动力计算结果对比分析， PHC管桩加固可液化地基效果较灌注桩更好。研究成果对PHC管桩加固可液化地基工程实践有一定指导意义。

关键词: PHC管桩, 复合地基, 地震液化, 数值模拟

Abstract: This paper presents a case history of the application of Prefabricated High strength Concrete (PHC) pipe piles in the improvement of liquefiable soils. The performance of the PHC pipe pile composite ground under the seismic loading is numerically simulated by the commercial software FLAC3D. Results are also compared with castinplace reinforced concrete piles. The results indicate that, the PHC pipe pile can improvement the performance of the composite ground. The degree of liquefaction is 0.20 for the composite ground and 0.48 for the ground without treatment. The dynamic analysis indicate that the PHC pipe pile has a better performance in the liquefiable soils over that of the castinplace reinforced concrete piles.

Key words: PHC Pipe Piles, Composite Ground, Seismic Liquefaction, Numerical Simulations