黏土黏附力试验研究

来源 :岩土力学 | 被引量 : 0次 | 上传用户:mgy1982
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
座落于黏土地基上的结构物在起浮或上拔过程中将受到地基对其的抗拉阻力。黏土对结构的黏附力是地基抗拉阻力的组成部分,其值的选取对地基抗拔承载力的确定有重要的影响。为了研究黏附力的发展规律和影响因素,改进了组合测盘,将内测盘底部和外界空气相通,从而消除孔隙水压力对黏附力的影响,并采用该测盘测量黏土在不同含水率、不同拉拔速率下的黏附力。试验结果表明,黏土对基础的拉拔应力随着基础拉拔位移的增加而线性增加,达到黏附力后将迅速消失。黏附力在含水率较小时为0,当土体的含水率超过塑限后黏附力开始增加,增加到峰值后下降,最后衰减到一个稳定值。相同拉拔速率下含水率变化时黏附力的峰值随拉拔速率的增加而增加,其对应的含水率随拉拔速率的增加而降低。相同含水率下,黏附力随拉拔速率的对数呈S型曲线变化。黏附力和土体不排水抗剪强度之间的比值随含水率的增加而增加。以上研究结果为深入理解黏附力变化规律并指导工程实践提供了依据。 Structures located on clay foundations will experience tensile resistance to the foundation during their ascent or ascent. The adhesion of clay to the structure is an integral part of the tensile resistance of the foundation. The selection of its value has an important influence on the determination of the bearing capacity of the foundation. In order to study the development rules and influencing factors of adhesion, the combination measuring disc was improved and the bottom of the inner disc was connected with the outside air to eliminate the influence of pore water pressure on the adhesion force. The measuring disc was used to measure the viscosity of clay in different moisture content, Adhesion at different drawing rates. The test results show that the drawing stress of clay on the foundation increases linearly with the increase of the foundation drawing displacement, and disappears rapidly after reaching the adhesion. When the moisture content of the soil is more than the plastic limit, the adhesion begins to increase, increases to the peak and then decreases, finally decays to a stable value. With the same drawing rate, the peak value of the adhesion increased with the increase of the drawing rate, and the corresponding water content decreased with the increase of drawing rate. The same moisture content, adhesion with the pull rate of the logarithmic showed S-curve changes. The ratio between the adhesion and undrained shear strength of soil increases with the increase of water content. The above results provide a basis for in-depth understanding of changes in adhesion and guide engineering practice.
其他文献
本文介绍了一种新型液位变送器的设计思想、工作原理及特点,比较详细地分析了其关键部分电路的具体设计方法,给出了具体的实验数据。结果表明,该变送器工作可靠,测量准确,并
4月21日,2012校车百强巡展胶州站现场,当两辆中通校车驶进山东胶州市秧歌城广场时,车身上的“中通校车,山东人的骄傲”几个大字很快就引起了观众的注意,很多人专门上车询问相
《破产法》在其实施过程中,遇到了许多障碍。本文着重论述实施《破产法》的两个主要问题。(1)政企关系。主要是确定政府与企业间的财产关系,以及对国有资产的管理。(2)破产企
生活为学生的识字提供了丰富的资源,识字来源于生活,再让识字回到生活中去,让学生从身边的日常生活中去发现语文,随时随地在生活中主动识字。学习的字在生活环境中的多次再现
河北省物价局对刑事、民事、经济、行政等案件中物品价值认定工作做出以下通知:一、物品价值认定工作由各级物价部门的价格事务所具体负责。价格事务所对物品价值的认定及出
温文尔雅的创始人后代与锋芒毕露的女CEO的争斗,颇像2000年的美国大选 The battle of the gentle, founders, offspring, and the hard-edged female CEO is akin to the 20
目前可能是收购日本公司的最佳时机了,而日本一直是不受外国公司欢迎的地方。当然也有少数外国公司在日本经营成功——如麦当劳.IBM、微软等就是明显的例子,但他们是特例。大
请下载后查看,本文暂不支持在线获取查看简介。 Please download and view, this article does not support online access to view profile.
目的 :通过体外分离、增殖培养获取γδT细胞、NK细胞和LAK细胞 ,并比较了 3种细胞的抗肿瘤的生物学特性。方法 :收集用不同单抗分别包装被粘附的细胞 ,然后通过MACS细胞分选
企业最容易步入的误区是“见钱眼开”。试图去拥抱一切可能的客户 The most easy business error is the “money eyes open.” Try to embrace all possible customers