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Improved Isotropically Consolidated Undrained Triaxial Test Method for Non-Self-Supporting Materials

机译：非自支撑材料的改进的各向同性固结不排水三轴试验方法

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摘要

The non-self-supporting materials that are often encountered in practice include shield tunnel grout, cement mortar, mine tailings, and dredged sludge. These materials typically have characteristics of high moisture content and high flowability. So far, a complete mechanical process (e.g., consolidation and shearing) of the non-self-supporting materials has not been well characterized because the materials of high flowability cannot be tested directly in conventional triaxial test equipment. This paper presents an improved triaxial test method capable of preparing the flowable specimens and testing them in a conventional triaxial apparatus. The procedure includes: (1) a flowable specimen prepared in the split mold and forced to be erective through a small confining pressure applied to the holes built in the split mold, (2) the split mold was detached from the specimen using the specially designed components and remained in the triaxial cell, and (3) the specimen was then subjected to the consolidation and shearing test. The improved triaxial test method was used to test the shield tunnel grout, dredged sludge, and the dry sand in an isotropically consolidated undrained shear condition. The test results indicated the improved triaxial method was used successfully to simulate the stress-strain behavior of the non-self-supporting materials in a holistic manner.
机译：在实践中经常遇到的非自支撑材料包括盾构隧道灌浆，水泥砂浆，矿山尾矿和疏ed的淤泥。这些材料通常具有高水分含量和高流动性的特征。到目前为止，由于不能在常规的三轴测试设备中直接测试高流动性的材料，因此尚未很好地表征非自支撑材料的完整机械过程（例如固结和剪切）。本文提出了一种改进的三轴测试方法，该方法能够制备可流动样品并在常规三轴设备中对其进行测试。该程序包括：（1）在分型模具中制备的可流动样品，并通过向分型模具中内置的孔施加较小的围压将其强制勃起；（2）使用特殊设计的方法将分型模具与样品分离（3）然后对样品进行固结和剪切试验。改进的三轴试验方法用于在各向同性固结不排水剪切条件下测试盾构隧道灌浆，疏ged的淤泥和干砂。测试结果表明，改进的三轴法已成功地用于整体模拟非自支撑材料的应力-应变行为。

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  • 来源
    《Geotechnical testing journal》 |2014年第4期|652-662|共11页
  • 作者

    Wei Zhu; Rui Wang; Jia Zuo; Cheng Lin; Fanlu Min;

  • 作者单位

    College of Environment, Hohai Univ., 1 Xikang Rd., Nanjing 210098, China;

    Geotechnical Engineering Research Institute, Hohai Univ., 1 Xikang Rd., Nanjing 210098, China;

    Wuhan Zhenghua Architectural Design Co., Ltd, Wuhan 430010, China;

    Terracon Consultants, Inc. 2201 Rowland Avenue, Savannah, Georgia, 31404, United States of America;

    College of Mechanics and Materials, Hohai Univ., 1 Xikang Rd., Nanjing 210098, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    non-self-supporting materials; improved triaxial test method; consolidation; undrained shearing;

    机译：非自立材料;改进的三轴测试方法;合并;不排水的剪切;

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