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土工格栅与膨胀土界面摩擦阻力系数试验研究
引用本文:徐林荣,凌建明,刘宝琛.土工格栅与膨胀土界面摩擦阻力系数试验研究[J].同济大学学报(自然科学版),2004,32(2):172-176.
作者姓名:徐林荣  凌建明  刘宝琛
作者单位:1. 中南大学铁道校区,土木建筑学院,湖南,长沙,410075
2. 同济大学,道路与交通工程教育部重点实验室,上海,200092
基金项目:铁道部专项基金资助项目(J98Z106)
摘    要:为满足土工合成材料在道路工程应用中的技术要求,开展了合理选取土工格栅与膨胀土界面摩擦阻力系数的研究.以正交设计原理为指导,选取筋土界面参数的4个影响因素(上覆压力、膨胀土体含水量、土工格栅尺寸和拉拔速度),进行了筋土界面摩擦阻力系数测试的拉拔试验.通过分析筋土界面各参数的影响因素,提出了当量拉拔位移的概念和筋土界面参数拉拔试验测试结果的过程分析方法,获取了各影响因素对摩擦阻力系数的影响程度及其在拉拔试验过程中的变化规律,并提出了拉拔试验的测试要求、步骤和结束标准.

关 键 词:拉拔试验  筋土界面参数  影响因素  当量拉拔位移  过程分析
文章编号:0253-374X(2004)02-0172-05

Experiment on Interface Friction Coefficient Parameters between Geogrids and Expansive Soil
XU Lin-rong,LING Jian-ming,LIU Bao-chen.Experiment on Interface Friction Coefficient Parameters between Geogrids and Expansive Soil[J].Journal of Tongji University(Natural Science),2004,32(2):172-176.
Authors:XU Lin-rong  LING Jian-ming  LIU Bao-chen
Abstract:In order to meet the engineering technical requirement of geosynthetic application on road engineering, in this paper,research on how to gain the reasonable value of friction coefficient between geogrids and expansive soil(FCGES) were carried out. Thus,four factors were selected as affecting factors of FCGES,and pull-out tests designed through orthogonal principle were carried out to further investigate the relationship between FCGES and the four affecting factors. The process analysis method of FCGES of procedure in pull-out tests is presented with the concept of "equivalent pull-out displacement" put forward,the law of factors' affecting degree influencing the FCGES in the pull-out procedure is obtained. And the pull-out requirement,steps and close standard of pull-out tests are also presented.
Keywords:pull-out test  friction coefficient between geogrids and expansive soil(FCGES)  affecting factor  equivalent pullout displacement  process analysis method
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