软土地基土工带加筋碎石垫层的应力扩散研究  

STUDY OF STRESS DISTRIBUTION IN BELT GEOSYNTHETIC-REINFORCED GRAVEL ON SOFT SOIL

作　　者：黄仙枝[1] 岂连生 白晓红[1] 

机构地区：[1]太原理工大学建筑与环境工程学院 [2]山西省民用建筑设计研究院,太原030012

出　　处：《岩石力学与工程学报》2004年第17期2992-2997,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：山西省归国留学生资助项目(2002-18);山西省自然科学基金(20041061)

摘　　要：通过土工带加筋碎石薄垫层原位静荷载试验,探讨了加筋地基的强度和模量特性,分析加筋层数、首层加筋间距、加筋带间距、加筋线密度对地基应力扩散的影响。得出影响薄垫层加筋地基应力扩散的主要因素是加筋层数和加筋带间距。地基经加筋后应力扩散明显增强,应力扩散角大于20°,因此建议加筋地基的应力扩散角可不受《建筑地基基础设计规范》(GB50007-2002)中有关规定的限制。Load tests in field are carried out for belt geosynthetic-reinforced gravel layers to study the strength and modulus characteristics of geosynthetic-reinforced foundation on soft soil. The effects are analyzed of numbers of reinforcement layers, distance from footing bottom to top reinforcement layer, interval of reinforcement layers and linear density of reinforcement on the angle of stress spread in foundation. It can be summaried that the angle of stress spread in foundation is obviously increased to larger than 20° after reinforcement by geosynthetic belt. The main affecting factors among above 4 parameters are the numbers of reinforcement layers and interval of reinforcement layers. Thus it is suggested that the angle of stress spread of geosynthetic-reinforced layer may be free from the limit of Chinese Code for Design of Building Foundation(GB50007-2002).

关 键 词：土力学 现场试验 土工带加筋碎石垫层 软土地基 应力扩散 

分 类 号：TU470[建筑科学—结构工程]