一种用于大体积软黏土试样制备的固结仪  

A Consolidometer for the Preparation of Large-Volume Soft Clay Specimen

作　　者：刘芳雪 王玮瑜 徐光明[3,4] LIU Fang-xue;WANG Wei-yu;XU Guang-ming(Key Laboratory of Geomechanics and Embankment Engineering of the Ministry of Education,Hohai University,Nanjing 210024,China;Jiangsu Research Center for Geotechnical Engineering Technology,Hohai University,Nanjing 210024,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing 210029,China)

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210024 [2]河海大学江苏省岩土工程技术工程研究中心,江苏南京210024 [3]南京水利科学研究院,江苏南京210029 [4]水文水资源与水利工程国家重点实验室,江苏南京210029

出　　处：《内蒙古工业大学学报（自然科学版）》2020年第6期430-437,共8页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：国家自然科学基金项目(11862020);中央高校基本科研业务费专项资金项目(2019B74014);江苏省2019年度普通高校研究生科研创新计划项目(SJKY19_0454)。

摘　　要：本文介绍了由南京水利科学研究院研制的大型杠杆式固结仪.利用该固结仪,开展了饱和软黏土在不同加载过程下的分级加载固结试验,实时监测了固结过程中试样顶部的沉降量,得到了沉降量随时间变化关系,计算了试样的压缩性指标,分析了加载过程对最终沉降量和不排水抗剪强度的影响.结果表明,该固结仪具有操作简单、加载均匀等特点,能够得到合理的压缩性指标;加载过程越快试样固结越快,完成固结所需的时间越短,可以通过快速加载的方法缩短试样固结时间,提高固结效率;试样的最终沉降量和不排水抗剪强度只与固结应力大小有关,与加载过程无关.This paper introduces a large-scale lever consolidometer developed by Nanjing Hydraulic Research Institute.The step-loading consolidation tests of saturated soft clay under different loading processes were carried out by using the consolidometer.In the course of consolidation,the settlement at the top of the specimen was monitored in real time and the relationship of settlement to time was obtained.The compressibility index of the specimen was calculated and the influence of the loading process on the ultimate settlement and undrained shear strength was analyzed.The results show that the consolidometer has the characteristics of simple operation,uniform loading and can obtain reasonable compressibility index.The faster the loading process,the shorter the time required to complete the consolidation;and the consolidation efficiency can be improved by means of rapid loading.The ultimate settlement and undrained shear strength of the specimen are only related to the consolidation stress,but not to the loading process.

关 键 词：固结仪 软黏土 分级加载 固结试验 

分 类 号：TB332[一般工业技术—材料科学与工程]