斜坡加固碎石土桩基水平承载力影响研究  

Study on Horizontal Bearing Capacity of Gravel Pile Foundation Reinforced by Slope

作　　者：刘斌[1] 赵其华[1] 丁梓涵 喻豪俊 LIU Bin ZHAO Qi-hua DING Zi-han YU Hao-jun(State Key Laboratory of Geo-Hazard Prevention and Geo-Environment Protection,College of Environment and Civil Engineering,Chengdu University of Technology, Chengdu 610059 ,P. R. China)

机构地区：[1]地质灾害防治与地质环境保护国家重点试验室,成都理工大学环境与土木工程学院,成都610059

出　　处：《科学技术与工程》2017年第2期267-272,共6页Science Technology and Engineering

基　　金：国家重点基础研究发展计划(2011CB013501);长江学者和创新团队发展计划(IRT0812)资助

摘　　要：斜坡桩基中碎石土性质不能满足设计要求时,需要进行加固处理。为了解加固后碎石土对斜坡桩基水平承载力的影响,进行了添加石膏改变胶结度的物理模拟试验,进一步增加了改变密实度的数值模拟研究。研究发现添加石膏和改变土体的密实度都可以有效的提高碎石土桩基的水平承载力;改变碎石土石膏含量和密实度分别可以使得斜坡桩基水平承载力提高1.13~2.06倍和1.32~1.86倍;得出了不同石膏含量和密实度碎石土地基的m值。The slope pile foundation of gravel soil properties can not meet the design requirements,the need for reinforcement. In order to understand the influence of the reinforced gravel soil on the horizontal bearing capacity of the slope pile foundation,a physical simulation experiment was carried out to change the cementation degree with the addition of gypsum,to further increase the numerical density change simulation. Not only the test found that the addition of gypsum and the change of soil compaction can effectively improve the level of the gravel soil foundation horizontal bearing capacity. The change of gravel soil gypsum content and density respectively can make the slope pile horizontal bearing capacity is increased by 1. 13 - 2. 06 times and 1. 32 - 1. 86 times. The m values of different gypsum content and density of gravel soil foundation were obtained.

关 键 词：碎石土 桩基 石膏 密实度 水平承载力 

分 类 号：TU472.32[建筑科学—结构工程]