碎石土地基湿陷性研究
摘要:主要以甘南330 kV变电所碎石土地基的现场浸水载荷试验和室内实验为基础,根据湿陷变形的特征,分析了影响碎石土地基湿陷变形的主要影响因素,探讨了碎石土地基的湿陷机理。认为碎石等大骨架颗粒与细粒胶结物相填充的特殊结构是碎石土地基湿陷最主要的原因。碎石土由于浸水骨架颗粒之间抗剪、抗压强度降低而导致碎石土结构破坏,随之填充在骨架颗粒之间的细颗粒产生二次湿陷,两者引起土体体积减小所导致。
Abstract:Based on the ponding loading test of Gannan 330kv transformer substation's foundation, the collapsible mechanics of gravel, soil is analyzed by the structure theory of soil's collapsible deformation and the main factors of gravel soil's collapsible distortion. And it's pointed out that the collapsibility is mainly due to the special structure of gravel soils which including big grain framework structure and granule cementation which filled in the big space. Because of gravel soil's main framwork's compressive and shear strenth decreased, the stucture of it is damaged too. Then the second collapsiblity come into being.
中文标题:
碎石土地基湿陷性研究
Study on the Collapsiblity of Gravel Soil Foundation
作者:
张管宏1,2,谌文武1,2,王生新1,2
ZHANG Guan-hong1,2,CHEN Wen-wu1,2,WANG Sheng-xin1,2
作者简介:张管宏,1982年生,男,汉族,甘肃庄浪县人,在读硕士研究生。主要研究方向为地基与基础工程及岩石工程力学。E-mail:zhanggho4@st.lzu.edu.cn
通讯地址:
1. 教育部西部灾害与环境力学重点实验室, 甘肃兰州 730000; 2. 兰州大学土木工程与力学学院地质工程系, 甘肃兰州 730000
1.KeyLaboratoryofWesternCalamityandEnvironmentalMechanics,LanzhouUniversity,LanzhouGansu730000China; 2.DepartmentofGeoengineering,CollegeofCivilEngineeringandMechanics,LanzhouUniversity,LanzhouGansu730000China
中图分类号:TU441.7
出版物:岩土工程技术
收稿日期:2006-01-16
网络出版日期:2021-07-06
关键词:碎石土,浸水载荷试验,湿陷性,湿陷机理
Key words:gravel soil,ponding loading test,collapsiblity,collapsible mechanics
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