深基坑大型物理模拟试验土质相似材料的研究  

A Study on Soil Similar Material of Large-Scale Physical Model Test of Deep Pit

作　　者：李国梁[1] 康后金 韩超[1] 泮晓华[1] 李四强 

机构地区：[1]中国科学院工程地质力学重点实验室中国科学院地质与地球物理研究所,北京市100029 [2]北京住总市政工程有限责任公司,北京市100029 [3]中建市政建设有限公司,北京市100161

出　　处：《公路》2011年第10期184-188,共5页Highway

基　　金："十一五"国家科技支撑计划重点项目;项目编号2008BAJ06B01

摘　　要：基于相似理论的基本原理,以中央电视台主楼深基坑工程为背景,以淤泥质黏土为骨料,以粉细砂、铁粉为辅料,研制出一种高容重低弹模的土质相似材料,通过调整组成相似材料的骨料和辅料的比例并结合力学实验进行分析,采用模糊数学综合评判指数和相似指标对各种配比材料进行综合评判,选出最符合央视深基坑工程及相似性要求的相似材料。并通过大型模型试验研究,说明这种配比的相似材料能有效地模拟基坑支护中桩锚土钉联合支护的变形机制。According to the similarity theory,context of deep pit of CCTV main building,a new similar material which contains three elements silt clay,fine sand and iron ore powder has been developed.It has some features as follows：high density,low elastic modulus and so on..By changing the proportions of the three elements and executing the mechanical tests and using the Fuzzy Math test data processing theory and test result assessment system,the most optimal similar materials which are used to the physical model test of deep pit of CCTV can be got.Through the large-scale physical model tests,it can be proved that the material can imitate deformation mechanism of deep pit which is supported by the pile,soil nail and anchor.

关 键 词：土质相似材料 模型试验 模糊数学综合评价体系 

分 类 号：TU441.3[建筑科学—岩土工程]