Journal Published Online: 06 December 2022
Volume 51, Issue 2

Thermal Behavior of Saturated Sand at Different Relative Densities

CODEN: JTEVAB

Abstract

With the proposal of a dual carbon goal in China, shallow geothermal energy as a kind of clean energy has been gradually promoted and applied. At the same time, more and more geotechnical workers have gradually paid attention to the influence of temperature on the mechanical characteristics of rock and soil mass. Existing experimental research has shown that the thermodynamic behavior for cohesive soil such as clay and silt is relatively mature but is relatively less mature for noncohesive soil, especially for sand. Based on the hollow cylinder triaxial specimen, a series of temperature-controlled triaxial tests have been carried out on saturated Fujian sand under different initial relative density and temperature conditions to capture the change of axial and volumetric strains for saturated sand specimen with increasing temperature. In addition, a bulk volumetric coefficient of thermal expansion of the sand specimen has been put forward, and the relationship between this coefficient and initial relative density also has been established. Then, the thermal deformation mechanism of saturated sand specimen has been revealed. After that, based on the test data during undrained shearing, the stress–strain relationship, deviatoric stress, and pore water pressure at peak state for loose and medium-dense saturated sand specimens have been explored, which can be used to provide some theoretical guidance for shallow geothermal energy and other temperature-related engineering applications.

Author Information

Liu, Hong
Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education, Chongqing University, Chongqing, China School of Architecture Engineering, Neijiang Normal University, Neijiang, Sichuan, China
Sun, Miao
School of Architecture Engineering, Neijiang Normal University, Neijiang, Sichuan, China
Meng, Minqiang
School of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shanxi, China
Sun, Zengchun
School of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shanxi, China
Pages: 18
Price: $25.00
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Details
Stock #: JTE20220375
ISSN: 0090-3973
DOI: 10.1520/JTE20220375