含水率对黄岛地区花岗岩残积土抗剪强度的影响  

Influence of water content on shear strength of granite residual soil in Huangdao area

作　　者：宋永山 徐晓 杨帅[1,2] 高盟 SONG Yongshan;XU Xiao;YANG Shuai;GAO Meng(College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Shandong University of Science and Technology,Qingdao,Shandong 266590,China)

机构地区：[1]山东科技大学土木工程与建筑学院,山东青岛266590 [2]山东科技大学山东省土木工程防灾减灾重点实验室,山东青岛266590

出　　处：《山东科技大学学报（自然科学版）》2019年第4期33-40,共8页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：山东省自然科学基金项目(ZR201702160391)

摘　　要：含水率是影响土体抗剪强度的重要因素。以直接取得的黄岛地区某挡土墙后填土为试样,进行了颗粒级配试验。同时,利用TCK-1室内三轴试验控制仪进行三轴剪切试验,研究含水率对黄岛地区花岗岩残积土抗剪强度的影响。试验结果表明:黄岛地区土壤颗粒粒径集中在2~5mm,占比40%左右。抗剪强度在含水率较低时随含水率增大而增强,达到峰值强度(含水率8%时)后随含水率增大而减小。粘聚力c随含水率的增加呈先增加后降低的趋势,峰值点为12.5%左右;内摩擦角φ随含水率的增加而减小。Water content is an important factor that affects the shear strength of soil.In this paper,the backfill of a retaining wall in Huangdao area was taken as the test sample and particle gradation test was performed.The triaxial compression test was also carried out by the TCK-1 triaxial controller,and the influence of water content on the shear strength of granite residual soil was investigated.The results show that the soil particle size is between 2 and 5 mm,accounting for about 40%.The shear strength increases with the increase of moisture content when the moisture content is low,and then decreases after the optimum moisture content of 8%.The cohesion c increases initially and then decreases with the rise of the moisture content,and reach the peak at 12.5%.The internal friction angleφtends to reduce as the water content grows.

关 键 词：黄岛花岗岩残积土 三轴剪切试验 抗剪强度 含水率 

分 类 号：TU473.1[建筑科学—结构工程]