刘兵, 卢毅, 刘春, 顾凯, 舒荣军. 2017: 砂土压缩过程中微观结构提取技术研究. 工程地质学报, 25(4): 968-974. DOI: 10.13544/j.cnki.jeg.2017.04.010
    引用本文: 刘兵, 卢毅, 刘春, 顾凯, 舒荣军. 2017: 砂土压缩过程中微观结构提取技术研究. 工程地质学报, 25(4): 968-974. DOI: 10.13544/j.cnki.jeg.2017.04.010
    LIU Bing, LU Yi, LIU Chun, GU Kai, SHU Rongjun. 2017: EXTRACTION TECHNOLOGY OF MICROSTRUCTURE OF SANDY SOIL IN COMPRESSION PROCESSES. JOURNAL OF ENGINEERING GEOLOGY, 25(4): 968-974. DOI: 10.13544/j.cnki.jeg.2017.04.010
    Citation: LIU Bing, LU Yi, LIU Chun, GU Kai, SHU Rongjun. 2017: EXTRACTION TECHNOLOGY OF MICROSTRUCTURE OF SANDY SOIL IN COMPRESSION PROCESSES. JOURNAL OF ENGINEERING GEOLOGY, 25(4): 968-974. DOI: 10.13544/j.cnki.jeg.2017.04.010

    砂土压缩过程中微观结构提取技术研究

    EXTRACTION TECHNOLOGY OF MICROSTRUCTURE OF SANDY SOIL IN COMPRESSION PROCESSES

    • 摘要: 对砂土压缩过程中微观结构的提取,有利于认识其在压缩变形和破坏中的微观机制。为实现对砂土压缩固结过程中微观结构的固定、提取和量化,本文设计了一种砂土压缩过程中微观结构提取技术,其主要由环氧树脂胶注入装置和改进的固结仪砂样采集盒两部分组成。在砂土压缩固结试验中,采用步进电机推动注射器中蓝色环氧树脂胶,通过预设的硅胶软管,从透水石底部进入压缩中的砂样。待环氧树脂胶固结后,制作薄片,并用光学显微镜拍摄得到其微观结构图像。应用该技术,能实现砂土在压缩过程中微观结构的固定和提取。本文对3种不同粒径和级配的石英砂进行压缩和固化试验,以介绍该提取技术。在获取其微观图像后,进一步采用PCAS软件对微观结构进行定量分析。

       

      Abstract: The extraction of microstructure of sandy soil in the compression process can benefit to understand the micro-mechanism of the compression deformation and failure. In order to fix, extract and quantify the microstructure of sandy soil during compression, this paper designs an extraction technology of microstructure of sand soil in the compression process. It is mainly composed of two parts, an apparatus for blue epoxy injection and an improved sand collecting box. In consolidation tests of sandy soil, a step motor is used to drive blue epoxy into the compacted sandy soil sample, via the preset hose and the bottom side of permeable stone. Thin sections can be made when the epoxy is consolidated. The microstructure images can be captured by optical microscope. Using the technology, the microstructure of sandy soil is consolidated and captured during compressive process. This paper introduces the extraction technology. Three kinds of quartz sands with different particle sizes and sorting are compressed and consolidated in laboratory. When the microscopic images are obtained, the PCAS software is used to quantify the microstructures.

       

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