提高室内变水头渗透试验效率的方法研究
Research on the Methods to Improve the Efficiency of Indoor Variable Head Permeability Test
王俐瑶1
作者信息
- 1. 中铁上海设计院集团有限公司 上海 200070
- 折叠
摘要
室内变水头渗透试验是研究黏性土的渗透特性和渗透规律的重要方法.然而,目前的试验方法在测定黏性土渗透系数的过程中存在试验误差较大、耗时较长等问题.本文以盐宜铁路泰州至宜兴段工程中的黏土为研究对象,采用变水头渗透试验对黏土样品的垂直渗透系数和水平渗透系数进行测试,研究了改变土样渗径、增加负压装置对渗透系数和渗透时间的影响.结果表明,控制渗径和增加负压,可以在保证测试数据有效性的前提下,缩短测试时间,是提高室内变水头渗透试验效率的有效途径,这对相关土工试验研究具有一定的借鉴意义.
Abstract
Indoor variable head permeability test is an important method for studying the permeability characteristics and permeability laws of cohesive soil.However,the current variable head permeability test has some problems in testing the permeability coefficient of cohesive soil,such as large experimental errors and long test-time.The clay samples were prepared from the Taizhou to Yixing section of the Yanyi Railway project.The vertical permeability coefficients and horizontal permeability coefficients of the samples were tested through indoor variable head permeability test.The effects of seepage paths and negative pressure on permeability coefficient and test time were analyzed.The results show that controlling the seepage paths and increasing the negative pressure can shorten the test time while ensuring the validity of the test data.It is an effective measure to improve the efficiency of indoor variable head permeability tests.This research has considerable reference for related geotechnical test research.
关键词
渗透系数/渗径/负压/黏土Key words
permeability coefficient/seepage paths/negative pressure/clay引用本文复制引用
基金项目
中铁上海设计院集团有限公司科技研发计划(集21-B16)
出版年
2024
NETL
NSTL
万方数据