南岳地区全风化花岗岩崩解特性试验研究  

Experimental research on disintegration characteristics of weathered granite in Nanyue

作　　者：李建新[1] 陈秋南[1] 赵柳[1] 贺成斌[1] 

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《湖南科技大学学报（自然科学版）》2015年第4期59-63,共5页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助项目(41172275);湖南科技大学创新基金项目(S120011)

摘　　要：基于阿基米德定律,采用自制大型全风化花岗岩崩解仪,分别对南岳地区全风化花岗岩原状、烘干、风干、带有护筒支护等不同状态的试样进行崩解试验研究.试验中运用最小二乘法,拟合量筒读数与崩解仪排水体积的直线关系方程式,改进浮筒初始读数方法,减少读数误差.试验结果表明,试件整个崩解过程中分为3个阶段:第二阶段的崩解速率最大,其次为第一阶段,崩解速率最小为第三阶段;失水方式直接影响崩解时间,烘干状态下,试件失水最为剧烈,崩解时间最短;护筒支护状态下,减少了水与试件的接触面积,延长了试件崩解时间.该研究成果为南岳全风化花岗岩地区的土建工程建设提供参考依据.Based on the Archimedes law,the fully weathered granite specimen in nanyue area were disintegrated test in undisturbed,drying,air drying,with liners supporting different status with the largely homemade fully weathered granite disintegration instrument. The least squares method was used in experiments,the linear equations of the measuring cylinder reading and disintegration instrument drainage volume was matched,the reading error was reduced with the buoy initial reading method was improved. The test results show that the whole disintegration process of specimen is divided into three stages： the biggest collapse rate is the second stage,the second is the first stage,and the third stage is minimum. The disintegration time is affected by filtration methods directly,specimen dehydration is severe and disintegration time is the shortest in drying condition,with having the protection of tube supporting,the contact area of the water and the specimens is reduced,prolong the disintegration of the specimens. The results of the study provide the reference basis for the civil engineering construction in nanyue fully weathered granite area.

关 键 词：全风化花岗岩 崩解特性 最小二乘法 崩解仪 阿基米德定律 

分 类 号：TU4[建筑科学—土工工程]