doi:10.16186/j.cnki.1673-9787.2019080025

Received:2019/08/07

Revised:2020/12/09

Published:2022/01/10

Analysis on mechanical properties of thawing soil-concrete interface

PAN Yiming1, WANG Boxin1,2, ZHANG Zhongqiong2, WANG Qing1

1.College of Construction Engineering， Jilin University， Changchun  130021 ， Jilin， China；2.State Key Laboratory of Frozen Soil Engineering， Lanzhou  730000 ， Gansu， China

Abstract: In order to study the mechanical properties of thawing soil-concrete interface，direct shear tests of the interface between silty clay and concrete in freezing and normal temperature environment were carried out with strain type direct shear apparatus under three moisture content conditions． The mechanical properties of the interface between silty clay-concrete under different moisture content，temperature environment，and normal loads were studied． The results showed that the shear stress-displacement curves presented obvious four-section distribution． The characteristics of the test curves varied with freezing temperature conditions，soil moisture content and normal pressure． The shear curves of room temperature soil-concrete showed elastic-plastic deformation without an obvious peak value． However，there was an obvious peak value in the shear process of the thawing soil-concrete interface． The shear strength of thawing soil-concrete interface was always lower than that of thawing soil． And in the stationary phase of direct shear，the cohesion and angle of internal friction were smaller than those in other stages．

Key words:thawing soil;concrete;interface;shear strength;freezing strength

 正融土-混凝土接触面力学性质分析_潘一鸣.pdf