基于面积比的挤密桩复合地基承载力计算方法

兰州理工大学学报 ›› 2025, Vol. 51 ›› Issue (4): 131-136.

基于面积比的挤密桩复合地基承载力计算方法

李云瑜^*1, 贾世平¹, 苏天涛²

1.甘肃第三建设集团有限公司, 甘肃兰州 730030;
2.兰州工业学院土木工程学院, 甘肃兰州 730050

收稿日期:2024-12-26 出版日期:2025-08-28 发布日期:2025-09-05
通讯作者: 李云瑜(1987-),男,甘肃东乡人,高级工程师.Email:792548415@qq.com
基金资助:
甘肃省住房和城乡建设厅建设科技项目(JK2023-08),甘肃省教育厅青年博士支持项目(2025QB-100)

Research on the calculation method of bearing capacity of compacted pile composite foundation based on area ratio

LI Yun-yu¹, JIA Shi-ping¹, SU Tian-tao²

1. Gansu Third Construction Group Co. Ltd., Lanzhou 730030, China;
2. School of Civil Engineering, Lanzhou Institute of Technology, Lanzhou 730050, China

Received:2024-12-26 Online:2025-08-28 Published:2025-09-05

摘要/Abstract

摘要： 基于挤密桩复合地基的加固机理和承载特性分析,将桩间土按挤密效果划分为不同区域,并改进常规面积比法,提出了一种综合考虑各挤密区面积及土体承载力变化的复合地基承载力计算方法.通过引入圆孔扩张理论和Tresca屈服准则,建立了有效挤密区半径的理论求解模型,并结合兰州新区某地基处理工程开展静载荷试验验证.结果表明:相较于传统面积比法,改进算法结果与实测值的吻合度显著提高,验证了该方法的准确性和工程实用价值,为挤密桩复合地基设计提供了更可靠的理论依据.

关键词: 挤密桩, 复合地基承载力, 挤密范围, 圆孔扩张理论, 静载荷试验

Abstract: Based on the reinforcement mechanism and bearing characteristics analysis of compacted pile composite foundation, the soil between piles was divided into different regions according to the compaction effect, the conventional area ratio method was improved, and a composite foundation bearing capacity calculation method that comprehensively considers the area of each compacted zone and the changes in soil bearing capacity was proposed. A theoretical model for the effective compaction zone radius was established by introducing the theory of circular hole expansion and Tresca yield criterion, and was verified by static load tests on a foundation treatment project in Lanzhou New Area, Gansu Province, China. The results show that compared with the traditional area ratio method, the improved method significantly improves the consistency between the calculation results and the measured values, verifying the accuracy and practical value of the improved method method, and providing a more reliable theoretical basis for the design of compacted pile composite foundation.

Key words: compaction pile, bearing capacity of composite foundation, compaction range, cavity expansion theory, static load test

中图分类号:

TU472

李云瑜, 贾世平, 苏天涛. 基于面积比的挤密桩复合地基承载力计算方法[J]. 兰州理工大学学报, 2025, 51(4): 131-136.

LI Yun-yu, JIA Shi-ping, SU Tian-tao. Research on the calculation method of bearing capacity of compacted pile composite foundation based on area ratio[J]. Journal of Lanzhou University of Technology, 2025, 51(4): 131-136.

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