大型振动台试验相似材料研究
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摘要
在分析总结近几年岩土工程物理模拟试验中常用的岩质相似材料研究现状的基础上,采用重晶石粉、石英砂、石膏、甘油配制振动台模型试验相似材料,通过不同配比的材料力学试验,考虑相似材料的含水率,分析研究了各种材料含量以及含水率变化对相似材料物理力学性质的影响规律,发现含水率对材料的抗压强度、粘聚力、弹性模量、摩擦角有较大影响,根据试验结果最终确定了振动台试验相似材料配比。试验结果证明,该相似材料力学指标稳定,能很好地满足相似材料的选材要求,便于一次性浇注较大尺寸规模的模型试件,适用于大型振动台等物理模拟试验。
On the basis of analyzing and summarizing the research status of similar materials of rock which were usually used in physical simulation experiments of geological engineering in recent years,using the similar materials of shaking table model tests compounded by barite powder,quartz sand,gypsum and glycerol,through mechanical test of different proportion of materials,and considering the water content of similar materials,the contents of all kinds of materials and the regularity of the influence of the water content changing on the physical and mechanical properties of similar materials were studies and analyzed.It was found that water content had great influence on the compressive strength,cohesion,elastic modulus and friction angle of materials.According to the result,the proportion of similar material in shaking table model test was fixed finally.It was proved by the test that the mechanical index of this kind of material was stale,could meet the needs of the choice requirements of similar materials,convenient for pouring relatively large-scale model specimen once only.It applies to physical simulation experiments like large-scale shaking table model test.
On the basis of analyzing and summarizing the research status of similar materials of rock which were usually used in physical simulation experiments of geological engineering in recent years,using the similar materials of shaking table model tests compounded by barite powder,quartz sand,gypsum and glycerol,through mechanical test of different proportion of materials,and considering the water content of similar materials,the contents of all kinds of materials and the regularity of the influence of the water content changing on the physical and mechanical properties of similar materials were studies and analyzed.It was found that water content had great influence on the compressive strength,cohesion,elastic modulus and friction angle of materials.According to the result,the proportion of similar material in shaking table model test was fixed finally.It was proved by the test that the mechanical index of this kind of material was stale,could meet the needs of the choice requirements of similar materials,convenient for pouring relatively large-scale model specimen once only.It applies to physical simulation experiments like large-scale shaking table model test.
引文
[1]Chen Guoxing.Geotechnical Earthquake engineering[M].Beijing:Science Press,2007[陈国兴.2007,岩土地震工程学[M].北京:科技出版社]
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[6]Zuo Baocheng et al,Research on similarmaterial of slope simulationexperiment[J].Rock and Soil Mechanics,2004,25(11):1805-1808[左保成.相似材料试验研究[J].岩土力学,2004,25(11):1805-1808]
[2]Liang Qingguo,Han Wenfeng,Ma Runyong,Physical simulationstudy on dynamic failures of layered rock masses under strong groundmotion[J].Rock and Soil Mechanics,2005,26(8):1307-1311[梁庆国,韩文峰,马润勇,等.强地震动作用下层状岩体破坏的物理模拟研究[J].岩土力学2005,26(8):1307-1311]
[3]Li Yushu,Li Tianbing,Wang Dong,et al,Plan design of model teston large vibrator for portal section of mountain tunnel under biasedpressure[J].Railway Engineering,2009,(8):61-65[李育枢,李天斌,王栋,等.山岭偏压隧道洞口段大型振动台模型试验方案设计[J].铁道建筑,2009,(8):61-65]
[4]Jiang Shuping.Design test scheme of large-scale shaking table modelfor tunnel outlet highway tunnel in seismic region with strong motion[J].Highway,2009,10:245-249[蒋树屏.高烈度地震区公路隧道洞口段大型振动台模型试验方案设计[J].公路,2009,10:245-249]
[5]Wang Hanpeng.Development of anew geomechanical similar mathri-al[J].Chinese Journal of Rock Mechanics and Engineering.2006,25(9):1842-1847[王汉鹏.新型地质力学模型试验相似材料的岩质[J].岩石力学与工程学报,2006,25(9):1842-1847]
[6]Zuo Baocheng et al,Research on similarmaterial of slope simulationexperiment[J].Rock and Soil Mechanics,2004,25(11):1805-1808[左保成.相似材料试验研究[J].岩土力学,2004,25(11):1805-1808]
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