土工基础

土工基础 ›› 2023, Vol. 37 ›› Issue (3): 497-500.

• 测试技术 • 上一篇    下一篇

新型粗颗粒土膨胀试验仪的研制与应用

蔡耀宇   

  1. （中国铁路设计集团有限公司,天津 300251）
  • 收稿日期:2021-12-09 修回日期:2022-01-18 出版日期:2023-06-30 发布日期:2023-07-06
  • 作者简介:蔡耀宇（1990-），男，工程师，硕士研究生，研究方向为岩土试验。
  • 基金资助:
    中国铁路设计集团有限公司科技研究重点课题（2020KF240407）

Development and Application of a New Apparatus for Expansive Property Test of Coarse-Grained Soils

CAI Yaoyu   

  1. (China Railway Design Co. Ltd., Tianjin 300251)
  • Received:2021-12-09 Revised:2022-01-18 Online:2023-06-30 Published:2023-07-06

摘要： 研究开发了一种新型粗颗粒土膨胀测试仪，介绍了仪器的结构和工作原理。利用仪器，对含膨胀岩土的粗颗粒土进行膨胀力和膨胀率试验，得到以下结论：①所研制的粗颗粒土膨胀试验仪能有效可靠的进行粗颗粒土的膨胀力和膨胀率试验；②含有膨胀岩土的粗颗粒填料具有一定的膨胀性；③粗颗粒土中细颗粒含量越多的土样，膨胀现象越明显；④粗颗粒土的膨胀特性与细颗粒土类似。研制的粗颗粒膨胀试验仪结构简单、操作方便、结果准确，为膨胀岩地区粗颗粒土膨胀性测试提供了精确可靠的试验设备和方法。

关键词: 粗颗粒土, 膨胀试验仪, 膨胀性, 膨胀力试验, 膨胀率试验

Abstract: In this paper, a new apparatus for expansive property test of the coarse-grained soil is introduced. The instrument overcomes the defect that the existing instrument is not suitable for coarse granular soil. The instrument is used to test the expansive force and expansion rate of the coarse-grained soil. The following conclusions are obtained: (1) the new apparatus can be used effectively and reliably. (2) The coarse-grained soil containing expansive rock and soil has certain expansive properties; (3) The soil samples with more fine particles in the coarse-grained soil have more obvious swelling phenomenon; (4) The expansive property of the coarse-grained soil is similar to that of the fine-grained soil. The new apparatus developed in this paper is convenient in operation, stable in performance, and precise in accuracy, which provides an accurate and reliable test equipment and method for testing the expansibility of coarse-grained soil.

Key words: Coarse-Grained Soils, Test Equipment, Expansive Properties, Swelling Force Test, Swelling Ratio Tests

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