不同剪切模量砂岩的相似材料配比设计  

Mix Design of Similar Materials for Sandstones with Different Shear Modulus

作　　者：况联飞[1,2] 陈国舟[1,2] 王涛[2] 

机构地区：[1]中国矿业大学力学与建筑工程学院,江苏徐州221008 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008

出　　处：《地下空间与工程学报》2012年第6期1173-1177,共5页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金项目(No.51009136)

摘　　要：为了研究深埋孔隙型富含水砂岩地层段的井壁受力及围岩与井壁的相互作用机理,进行了室内大型物理模拟试验。并通过相似材料配比试验获得了两种不同剪切模量砂岩的相似配比,用以在大型物理模拟试验中对应模拟两不同深度段的原型砂岩。同时,通过配比试验结果发现影响相似材料强度及剪切模量的两主要因素为水胶比和胶结材料含量,具体表现为,随着水胶比的减小,试件的单轴抗压强度及剪切模量均呈增大趋势,而胶结材料水泥含量少则是造成部分试件强度低的根本原因。最后,通过分析二者的影响方式以及依据已获得的试验规律,提出了进一步获得更大剪切模量砂岩相似材料配比设计的基本思路。In order to study the loading on shaft lining and the interaction mechanism between surrounding rock and shaft lining in deep buried sandstone with pores of rich water,large scale indoor physical simulation tests were conducted.According to the tests for the mix proportion of similar materials mixture,the mix proportions of similar materials for two different shear modulus sandstones had been obtained,which were used to simulate the in situ sandstones under two different depths separately in the physical simulation tests.At the same time,based upon the mix test results,we found that the water-cement ratio and cement content were the two main factors which impacted the strength and shear modulus of similar materials.For example,as the water-cement ratio decreased,the uniaxial compressive strength of the specimen and its shear modulus showed increasing trend,and the main cause of low strength for some specimens was due to less cement content.Finally,based on the acquired test law,the mix design idea of similar materials about how to obtain sandstone with much greater shear modulus had also been proposed in this paper.

关 键 词：相似材料 剪切模量 砂岩 配比设计 

分 类 号：TU458.4[建筑科学—岩土工程]