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[1]方宁,周峰,宋著,等.含水率对花岗岩残积土承载力影响的试验研究[J].南京工业大学学报(自然科学版),2020,42(02):231-236.[doi:10.3969/j.issn.1671-7627.2020.02.014]
 FANG Ning,ZHOU Feng,SONG Zhu,et al.Experimental research on influence of water content on bearing capacity of granite residual soil[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2020,42(02):231-236.[doi:10.3969/j.issn.1671-7627.2020.02.014]
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含水率对花岗岩残积土承载力影响的试验研究()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
42
期数:
2020年02期
页码:
231-236
栏目:
出版日期:
2020-03-22

文章信息/Info

Title:
Experimental research on influence of water content on bearing capacity of granite residual soil
文章编号:
1671-7627(2020)02-0231-06
作者:
方宁1周峰12宋著1管珊珊3朱锐4
1. 南京工业大学 交通运输工程学院,江苏 南京 210009; 2.南京新吉泰岩土工程有限公司,江苏 南京 210009; 3.淮安市建筑科学研究院有限公司,江苏 淮安 223000; 4.南京水利科学研究院 岩土工程研究所,江苏 南京 210024
Author(s):
FANG Ning1 ZHOU Feng12 SONG Zhu1 GUAN Shanshan3ZHU Rui4
1. College of Transportation Science and Engineering, Nanjing Tech University, Nanjing 210009, China; 2. Nanjing Xinjitai Geotechnical Engineering Co. Ltd., Nanjing 210009, China; 3. Huaian Architectural Science Research Institute Co. Ltd., Nanjing 223000, China; 4. Geotechnical Engineering Department, Nanjing Hydraulic Reserch Institute, Nanjing 210024, China
关键词:
花岗岩残积土 含水率 标准贯入试验 室内试验 地基承载力
Keywords:
granite residual soil water content standard penetration test indoor test foundation bearing capacity
分类号:
TU47
DOI:
10.3969/j.issn.1671-7627.2020.02.014
文献标志码:
A
摘要:
花岗岩残积土具有遇水软化的特性,其工程力学特性受含水率变化影响显著,如考虑不周会对基础设计造成不利影响。为了定量分析含水率变化对花岗岩残积土地基承载力的影响,采用室内试验与标准贯入试验,对比浸水前后的地基承载力,分析含水率对地基承载力的影响机制。结果表明:浸水条件显著增大了土体的含水率,含水率增量随深度的增加而显著减小,浸水对花岗岩残积土含水率的影响深度不超过2 m,含水率的增加降低了花岗岩残积土的抗剪强度及地基承载力,造成地基承载力损失率最高可达28.7%,地基承载力损失率随深度增加而减小。在基础设计时,应考虑含水率变化对地基承载力的影响,并根据工程要求确定合理的基础埋深。
Abstract:
Granite residual soil has the characteristics of softening in contact with water, and its engineering mechanical characteristics are significantly affected by changes of water content. If not properly considered, it will adversely affect the foundation design. In order to quantitatively analyze the influence of water content on the bearing capacity of granite residual soil, this paper used indoor tests and standard penetration tests to compare ground bearing capacity of granite residual soil before and after soaking. The influence mechanism of water content on ground bearing capacity was studied. The results showed that the soaking condition significantly increased the water content of the soil, and the increase in water content decreased significantly with increasing depth. The effect of submergence on the water content of granite residual soil did not exceed 2 m. The increase of water content reduced the shear strength of granite residual soil and its bearing capacity, resulting in the maximum loss of the bearing capacity of the foundation was up to 28.7%. Foundation bearing capacity loss rate decreased with depth. In the design of the foundation, the influence of changes in water content on the bearing capacity of the foundation should be considered, and a reasonable foundation burial depth should be determined according to the engineering requirements.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2018-08-01
基金项目:国家自然科学基金(51778287)
作者简介:方宁(1993—),男,E-mail: fangning312@163.com; 周峰(联系人),教授,E-mail: zhoufeng@njtech.edu.cn.
引文格式:方宁,周峰,宋著,等.含水率对花岗岩残积土承载力影响的试验研究[J].南京工业大学学报(自然科学版),2020,42(2):231-236.
FANG Ning, ZHOU Feng, SONG Zhu, et al. Experimental research on influence of water content on bearing capacity of granite residual soil[J].Journal of Nanjing Tech University(Natural Science Edition),2020,42(2):231-236..
更新日期/Last Update: 2020-03-20