[1]胡卸文,伊小娟,胡恒洋,等.无泥型软弱层带饱水前后强度特性现场试验[J].山地学报,2011,(02):210.
　HU Xiewen,YI Xiaojuan,HU Hengyang,et al.Field Test on Strength Characteristics of Nonclay Weak Interbed before and after Saturation[J].Mountain Research,2011,(02):210.
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无泥型软弱层带饱水前后强度特性现场试验()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2011年02期
页码:
210
栏目:
山地学报
出版日期:
2011-01-01

文章信息/Info

Title:
Field Test on Strength Characteristics of Nonclay Weak Interbed before and after Saturation
作者:
胡卸文;伊小娟;胡恒洋;曾记全;
1.西南交通大学 地球科学与环境工程学院，四川 成都 610031;
2. 西南交通大学 土木工程系，四川 峨眉山 614202；
3.中国水电顾问集团成都勘测设计研究院 科学研究所，四川 成都 610072
Author(s):
HU Xiewen;  YI Xiaojuan;  HU Hengyang;  ZENG Jiquan
1. Faculty of Geosciences and Environmental Engineering，Southwest Jiaotong University，Chengdu 610031，China；
2. Department of Civil Engineering，Southwest Jiaotong University，Emeishan 614202，China; 3 Chengdu Hydroelectric Investigation and Design Institute，China Hydropower Consulting Group，Chengdu 610072，China
关键词:
软弱夹层; 粗粒土; 变形; 强度参数
Keywords:
weak interbed;  coarsegrained soil;  deformation;  strength parameters
分类号:
P6411
文献标志码:
A
摘要:
针对以粗粒土为代表的软弱层带在水电、铁路等交通领域对边坡及洞室围岩稳定性的控制,结合某水电工程坝区,分别对岩块岩屑型和岩屑夹泥型两种软弱夹层,在考虑一定围压作用下进行了天然含水状态和饱水状态的现场直剪试验。结果显示,剪应力-剪切位移曲线饱水前、后均呈现出微弱的峰值,整体均表现为塑性破坏特征,饱水前、后发生屈服前的剪切位移分别为5 mm和10 mm以内。在强度参数上,两类夹层饱水前、后峰值强度内摩擦系数降低幅度一般在8%~10%,残余强度一般降低5%以内。表明以粗粒土为代表的软弱层带由于细粒(
Abstract:
Due to the control action of nonclay weak interbed composed by coarsegrained soil to the stability of slope and surrounding rock masses in hydropower, railway and other transportation field, combined with the dam area of a hydropower projects, considering the effect of confining pressure, insitu shear test on two types of weak interbed under natural and saturated state is carried out. The results showed that a faint peak appeared in the shear strength versus. shear displacement curve before and after saturation, the plastic deformation failure characteristics were performed in the overall curve, and the shear displacement under yielding were less than 5 mm before saturation and less than 10 mm after saturation. For the strength parameters, internal friction coefficient of the peak strength before and after saturation of the two types of weak interbed was decreased generally 8% to 10%, the residual strength was generally reduced no more than 5%. According to the test, it can be found that because the finegrained material (<0.075 mm) accounted for low proportion in the nonclay weak interbed composed by coarsegrained soil, the finegrained material cannot wrap the coarsegrained to form lubricant. At the same time due to confining pressure effect, saturation state had little influence on the strength parameters. Therefore, the test represented that different saturated state had no significant effect on the internal friction and the cohesion in the noclay weak interbed, and the strength parameters of the weak interbed were mainly depended on the particles composition of itself.

相似文献/References:

[1]李树森,符文熹,聂德新.洞室顶部软弱夹层和层状岩体的稳定性分析[J].山地学报,2000,(02):156.
[2]张 文,刘 勇,王运生,等.地震作用下边坡及不利地质体的动力特征[J].山地学报,2016,(06):732.[doi:10.16089/j.cnki.1008-2786.000180]
　ZHANG Wen,LIU Yong,WANG Yunsheng,et al.Analysis of Dynamic Characteristics of Slope and Unfavorable Geological Body Under Earthquake[J].Mountain Research,2016,(02):732.[doi:10.16089/j.cnki.1008-2786.000180]

备注/Memo

备注/Memo:
收稿日期(Received date)：2010-11-01。
基金项目（Foundation item）：国家自然科学
基金项目（40772175，40972175）。\[Supported by National Natural Science foundation of China (40772175，40972175).\];NSFC-云南联合基金重点项目(U1033601)。\[Supported by National Natural Science Foundation Projocctnutual fund of yunnan Province(U1033601).\]
作者简介（Biography）：胡卸文(1963-)，男，博士，1985年毕业于成都理工大学（原成都地质学院）水文系，现任教授、博士生导师，主要从事工程地质、环境地质方面的教学与研究工作。 \[Hu Xiewen(1963-),Male, doctor tutor, professor, graduated from Chengdu University of Technology( Chengdu Geology Institute) in 1985, mainly engaged in teaching and researching work of engineering geology ,environmental geology.\]E-mail：huxiewen@163.com
更新日期/Last Update: 1900-01-01