玻璃钢套筒基础切向冻胀力消减作用试验研究  

Study on reduction of tangential frost-heave force on foundation with fiberglass sleeve

作　　者：袁俊[1,2] 于皓琳[3] 管顺清[2] 王学明[2] 严福章[4] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000 [2]中国电力工程顾问集团西北电力设计院有限公司,陕西西安710075 [3]哈尔滨工业大学土木工程学院结构工程灾变与控制教育部重点实验室,黑龙江哈尔滨150090 [4]国网北京经济技术研究院,北京102209

出　　处：《西安建筑科技大学学报（自然科学版）》2016年第2期202-206,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：冻土工程国家重点实验室基金(SKLFSE201312);国家电网公司科技部计划项目(HQ-2013-S-EX-018);西北电力设计院科技项目(XB1-TM04-2013)

摘　　要：通过1:10比例的直柱基础模型试验,对比测定了不同地温和不同含水率的粉质黏土中普通基础与玻璃钢套筒基础的单位切向冻胀力,研究了玻璃钢套筒在不同粉质黏土地质环境中对切向冻胀力的消减作用效率.研究结果表明,采用玻璃钢套筒后对冻土地基冻拔作用有明显的削弱,玻璃钢套筒切向冻胀力消减系数为0.70~0.83,切向冻胀力消减效率为17.24%~29.70%.土体含水率为20%、25%、30%时,切向冻胀力消减系数平均值分别为0.73、0.74、0.79,切向冻胀力消减效率平均值分别为27.03%、25.60%、20.51%.Model tests on column foundation were conducted with a scale of 1:10 to determine the unit tangential frost-heave force of column foundation with fiberglass sleeve at different ground temperature and water contentin frozen silty clay.The reduction effect caused by fiberglass sleeve on tangential frost-heave force under different frozen geological conditions were studied as well.Results indicate that the reduction coefficient of tangential frost-heave ranges from 0.70 to 0.83 compared to column foundation without fiberglass sleeve,and the relative reduction efficiency focuse on 17.24% ~ 29.70% depending on the geological conditions.Concretely,reduction coefficients are 0.73,0.74 and 0.79,respectively,with the water contents of 27.03%,25.06% and 20.51%.

关 键 词：冻土 玻璃钢 基础工程 单位切向冻胀力 消减系数 

分 类 号：TU445[建筑科学—岩土工程]