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首页> 外文期刊>Tunnelling and underground space technology >'Standing' full-scale loading tests on the mechanical behavior of a special-shape shield lining under shallowly-buried conditions
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'Standing' full-scale loading tests on the mechanical behavior of a special-shape shield lining under shallowly-buried conditions

机译：在浅埋条件下对特殊形状的屏蔽衬砌的机械性能进行“常规”满载测试

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摘要

A reconflgurable loading and data acquisition platform was developed for the first time to perform 'standing' prototype loading tests on a special-shape segmental lining. The testing lining was seated on rubber bearing plates installed at the invert region to simulate the structure-subgrade interaction. The mechanical characteristics of the testing lining under the deadweight condition and subject to different shallow overburden conditions were examined. The influences of lateral earth pressure and soil reaction pressure on the structural performance of the testing lining were investigated. The testing results showed that the distributions of internal forces and deformation under the deadweight condition differed greatly from that obtained in earth-and-water pressure loading tests. Although the contribution of deadweight to the internal forces was small, its influence' on deformation was significant for shallowly-buried cases. The structural response of the lining in current 'standing' loading tests was different from that observed in conventional 'lying' loading tests. In 'standing' loading tests, the internal forces and deformation at the invert region were smaller than that at the crown area. Increasing lateral earth pressure and soil reaction pressure were beneficial for enhancing the overall rigidity of the lining structure. The testing results also indicated that the structural responses (rotational stiffness, effective rigidity ratio and moment transferring coefficient) of the lining structure depended on the joint locations, and evolved during loading.
机译：首次开发了可配置的加载和数据采集平台，以对特殊形状的分段衬砌执行“常规”原型加载测试。将测试衬里放在安装在反型区域的橡胶承板上，以模拟结构-路基相互作用。研究了在自重条件下以及在不同的浅表土条件下测试衬砌的机械特性。研究了侧向土压力和土反力压力对试验衬砌结构性能的影响。试验结果表明，自重条件下的内力和变形分布与土压力试验中的分布有很大差异。尽管自重对内力的贡献很小，但对于浅埋情况，其对变形的影响却很大。当前“站立式”载荷测试中衬砌的结构响应与常规“躺式”载荷测试中观察到的不同。在“直立”载荷测试中，在反向区域的内力和变形小于在胎冠区域的内力和变形。增大横向土压力和土壤反作用压力有利于提高衬砌结构的整体刚度。测试结果还表明，衬砌结构的结构响应（旋转刚度，有效刚度比和矩传递系数）取决于接头位置，并在加载过程中发生变化。

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  • 来源
    《Tunnelling and underground space technology》 |2019年第4期|34-50|共17页
  • 作者

    Zhang Zixin; Zhu Yeting; Huang Xin; Zhu Yanfei; Liu Wei;

  • 作者单位

    Tongji Univ, Dept Geotech Engn, 1239 Siping Rd, Shanghai 200092, Peoples R China|Tongji Univ, Minist Educ, Key Lab Geotech & Underground Engn, Shanghai 200092, Peoples R China;

    Tongji Univ, Dept Geotech Engn, 1239 Siping Rd, Shanghai 200092, Peoples R China|Tongji Univ, Minist Educ, Key Lab Geotech & Underground Engn, Shanghai 200092, Peoples R China|Shanghai Tunnel Engn Co Ltd, Shanghai 200082, Peoples R China;

    Tongji Univ, Dept Geotech Engn, 1239 Siping Rd, Shanghai 200092, Peoples R China|Tongji Univ, Minist Educ, Key Lab Geotech & Underground Engn, Shanghai 200092, Peoples R China;

    Shanghai Tunnel Engn Co Ltd, Shanghai 200082, Peoples R China;

    Tongji Univ, Dept Geotech Engn, 1239 Siping Rd, Shanghai 200092, Peoples R China|Tongji Univ, Minist Educ, Key Lab Geotech & Underground Engn, Shanghai 200092, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Special-shape shield; Full-scale test; Deformation; Rigidity;

    机译：异型屏蔽;全面测试;变形;刚度;

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