摘要
路基填料的承载比(CBR值)是土体抗局部剪切力(潜在强度)的反映,是评价其路用性能的重要指标。为了研究千枚状板岩CBR值的特征和影响CBR值的主要因素,结合武广客运专线的工程实际,对沿线的千枚状板岩进行了室内CBR值试验。从颗粒组成、矿物成分以及泡水时间、最大颗粒粒径和击实次数几方面研究了其对填料CBR值的影响,并对影响因素采用无重复双因素方差分析方法进行了显著性分析。结果表明:影响CBR值的主要因素是填料中的颗粒矿物组成和泡水时间与击实次数,颗粒大小影响不是很大。在此需要强调的是风化软岩不能直接用于浸水地区路基的填筑,必须对填料进一步改良,同时加强路基、路面的防护与排水措施。
The California bearing ratio （CBR） reflects the potential strength of subgrade material and is an important index to evaluate its performance in expressway. In order to study the main influence factors of the CBR value and CBR characteristics of phyllitic slate, the CBR tests of the subgrade with materials of weathered softrock from the Wu-Guang Railroad Passenger Dedicated Line were done. On the basis of the result of tests, the influence factors of CBR of the subgrade materials were studied, such as mineral component, immersion time, maximal particle size and striking times, and then a prominent property analysis was made with a method of nonrepeative double factor variance analysis, and useful conclusions were obtained that the main influence factors of CBR of the subgrade with materials of phyllitic slate are the type and content of mineral component, immersion time and striking times, and the influence of particle size was not very important. It is worthily emphasized that, these weathered soft rock can not be directly used as filling material in the immersion area and rainy region, the material must be further improved, and some measures, such as the protection of road slope and drainage of foundation face, must be adopted.
出处
《长江科学院院报》
CSCD
北大核心
2009年第8期41-45,共5页
Journal of Changjiang River Scientific Research Institute
基金
国家自然科学基金资助项目(50408020)
关键词
加州承载比
千枚状板岩
方差分析
风化软岩
显著性
击实
CBR
phyllitic slate
variance analysis
weathered soft rock
prominent property
compaction
作者简介
但汉成（1983-），男，湖北潜江人，博士研究生，从事路基、路面工程研究，（电话）0731-2659893（电子信箱）danhancheng@163.com.
