| 橡胶-粉土轻质混合土中管道动力响应特性 |
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| 引用本文： | 周恩全,宗之鑫,王琼,陆建飞,左熹.橡胶-粉土轻质混合土中管道动力响应特性[J].岩土力学,2020,41(4):1388-1395. |
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| 作者姓名： | 周恩全 宗之鑫 王琼 陆建飞 左熹 |
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| 作者单位： | 1. 江苏大学 土木工程与力学学院，江苏 镇江 212013；2. 金陵科技学院 建筑工程学院，江苏 南京 211169 |
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| 基金项目： | 国家自然科学基金（No.51508236）；江苏省自然科学基金（No.BK20150519）；中国博士后基金（No.2015M580397）；江苏大学高级人才科研启动基金（No.15JDG172）。 |
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| 摘 要： | 埋地管道在交通荷载等作用下会发生破坏,对区域内的经济和生活造成较大的影响。近年来废弃橡胶轮胎颗粒与土混合成轻质土逐渐被用于路基填料等领域。设计完成了冲击动载下橡胶-粉土轻质混合土中管道动力响应特性的模型试验,采用等体积置换法在地基土中掺入0%、10%、20%、30%的废轮胎颗粒,通过路基的表层沉降以及埋地管道的变形特性来研究轻质混合土作为路基填料的减振性能。试验结果表明,加入橡胶颗粒能有效减小路基表层沉降,当橡胶含量10%时,路基沉降减小最明显;埋地管道在冲击动载的作用下表现出"压扁"的形态特征,加入橡胶颗粒能明显减小埋地管道的应变及弯矩响应,当橡胶含量为20%和30%时,管道的应变和弯矩减小更为明显。
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| 关 键 词： | 埋地管道 冲击动载 橡胶 表层沉降 应变 |
| 收稿时间： | 2019-04-14 |
| 修稿时间： | 2019-07-01 |
Dynamic characteristics of pipe buried in rubber-silt lightweight mixtures |
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| ZHOU En-quan,ZONG Zhi-xin,WANG Qiong,LU Jian-fei,ZUO Xi.Dynamic characteristics of pipe buried in rubber-silt lightweight mixtures[J].Rock and Soil Mechanics,2020,41(4):1388-1395. |
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| Authors: | ZHOU En-quan ZONG Zhi-xin WANG Qiong LU Jian-fei ZUO Xi |
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| Institution: | 1. Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, China;
2. Institute of Architectural Engineering, Jinling Institute of Technology, Nanjing, Jiangsu 211169, China |
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| Abstract: | The buried pipes will be destroyed under traffic loading, which will have a great influence on the economy and life in this area. In recent years, waste rubber tire particles mixed with soil are gradually used as backfill soil for subgrade and other fields. In this paper, the dynamic characteristics of pipe buried in rubber-silt lightweight mixtures under impact loading were investigated. In this study, 0%, 10%, 20% and 30% waste tire particles were added into the foundation soil by equal volume replacement method. The vibration absorption performance of light mixed soil as subgrade filler was studied through the surface settlement of subgrade and the deformation characteristics of buried pipeline. The results show that the addition of rubber particles to silty soil can effectively reduce the surface settlement of model soil. The settlement reduction is the most obvious with the 10% rubber content. The buried pipe shows a shape of "flattening" under impact loading. The addition of rubber particles can significantly reduce the strain and bending moment response of the buried pipe. When the rubber content is 20% and 30%, the strain and bending moment of the buried pipe decrease more obviously. |
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| Keywords: | buried pipe impact loading rubber surface settlement strain |
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