斜坡碎石土地基水平抗力系数研究

发布时间：2018-01-22 14:59

本文关键词： 斜坡碎石土比例系数m 室内试验现场试验　出处：《岩土力学》2017年06期 　论文类型：期刊论文

【摘要】：现有水平受荷桩地基水平抗力系数的比例系数m值取值通常是基于天然地基的水平面假设,而对斜坡地基情况下,m值取值至今没有相应的规范或者经验可循。为了研究碎石土地基斜坡上地基水平抗力系数的比例系数m值的取值,通过室内水平静载试验研究斜坡碎石土地基桩基水平承载特性,探讨m值随斜坡坡度的变化情况,提出了基于水平碎石土地基m值来确定不同斜坡坡度碎石土地基m值的修正公式和相应的取值范围,并通过现场试验进行了验证,为山区工程建设时m值的取值提供一定的参考。研究结果表明:斜坡碎石土地基m值取值范围为23~65 MN/m4,并且m值随着坡度的增大而减小。
[Abstract]:The ratio coefficient m of the horizontal resistance coefficient of the existing horizontal pile foundation is usually based on the assumption of the horizontal plane of the natural foundation, but in the case of the slope foundation. In order to study the proportional coefficient m of the horizontal resistance coefficient on the slope of gravel foundation, there is no corresponding criterion or experience to get the value of m value. The horizontal bearing characteristics of pile foundation on slope gravel foundation are studied by indoor water static load test, and the variation of m value with slope gradient is discussed. Based on the m value of horizontal gravel soil foundation, a modified formula and corresponding value range of different slope grade gravel soil foundation are put forward, and verified by field test. The research results show that the m value of slope gravel foundation is in the range of 23 ~ (65) mn / m ~ (4), and the m value decreases with the increase of slope.
【作者单位】：成都理工大学地质灾害防治与地质环境保护国家重点实验室;成都理工大学环境与土木工程学院;四川大学水利水电学院;
【基金】：国家重点基础研究发展计划(No.2011CB013501) 长江学者和创新团队发展计划(No.IRT0812)~~
【分类号】：TU473.1
【正文快照】： This work was supported by National Basic Research Program of China(2011CB013501);Program for Changjiang Scholars and Innovative Research Team(IRT0812).目前,我国输电线路铁塔桩基水平承载力计算大多采用m法,此时m值的取值往往成为设计中关键的因素之一。地基水平

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