碎石桩极限承载力计算的几种方法  

Methods for Calculation of Ultimate Bearing Capacity of Crushed Stone Pile

作　　者：赖紫辉[1] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《铁道工程学报》2010年第6期48-50,共3页Journal of Railway Engineering Society

摘　　要：研究目的:碎石桩极限承载力计算是复合地基承载力计算的关键,本文阐述了碎石桩极限承载力Hughes-Withers计算式、Brauns计算式、盛崇文计算式、刘杰等计算式,并通过工程实例进行计算、分析与比较,推荐可采用的计算式,以期对今后规范和标准的修编,以及类似工程提供借鉴。研究结论:推荐单桩极限承载力按盛崇文推导的公式计算,既考虑了群桩效应,又避免了地基土各种物理力学指标的采集,计算简单,且偏于安全;建议复合地基承载力按极限承载力设计,再除以1.3～1.5的安全系数,不仅概念明确,也经济合理。Research purposes： The calculation of ultimate bearing capacity is critical for calculation of bearing capacity of composite foundation. This paper presents the formulas of Hughes - Withers, Brauns, Sheng Chongwen , and Liu jie used for calculation of ultimate bearing capacity of crushed stone pile, and compares the calculated results of engineering examples using these methods for providing the references to the revision of standards and similar projects in future. Research conclusions：It is proposed the ultimate bearing capacity of single crushed stone pile should be calculated with the formula of Sheng Chongwen. With this formula, not only are the effects of pile group considered, but also is the collection of various physical and mechanical parameters for the foundation soil avoided. The bearing capacity of composite foundation should be calculated according to the ultimate bearing capacity, and then divided by safety factor from 1.3 tol. 5, with . clear concept and money saving.

关 键 词：软土地基 碎石桩 复合地基 极限承载力 

分 类 号：TU473.12[建筑科学—结构工程]