Influence of the boundary effect on the mechanical response test of pavement cushion under the wetting effect of silt

作     者：Luo Qiqi Yu Qian Zhang Sheng Ma Xinyan Ye Xinyu Du Yinfei 罗其奇;余虔;张升;马新岩;叶新宇;杜银飞

作者机构：School of Civil EngineeringCentral South UniversityChangsha 410075China Department of Geotechnical EngineeringChina Airport Planning and Design Institute Co.Ltd.Beijing 100020China Hunan Tieyuan Civil Engineering Testing Co.Ltd.Changsha 410075China 

基　　金：The National Natural Science Foundation of China(No.52008401) the Natural Science Foundation of Hunan Province(No.2021JJ40770) the Open Fund of Hunan Tieyuan Civil Engineering Testing Co.,Ltd.(No.HNTY2022K04) 

出 版 物：《Journal of Southeast University(English Edition)》 (东南大学学报（英文版）)

年 卷 期：2024年第40卷第3期

页      码：266-274页

摘      要：Through a self-developed model test system,the mechanical properties of silt and the deformation characteristics of airport runways were investigated during the period of subgrade *** on the test results,the reliability of the numerical simulation results was *** models with different sizes were *** the same cushion parameter and loading width ranges,the effects of the cushion parameters and loading conditions on the mechanical responses of the cushion before and after subgrade wetting were *** results show that the internal friction angles of silt with different wetting degrees are approximately 34°.The cohesion is from 8 to 44 kPa,and the elastic modulus is from 15 to 34 *** and after subgrade wetting,the variation rates of the cushion horizontal tensile stresses with the same cushion parameters and loading width ranges are different under the influence of boundary *** subgrade wetting,the difference in the variation rates of the cushion horizontal tensile stresses under the same cushion parameter range decreases compared with that before subgrade wetting;however,this difference increases under the same loading width *** and after subgrade wetting,the influence of the boundary effect on the mechanical response evaluation of the cushion is not beneficial for optimizing the pavement design *** the cushion thickness is more than 0.25 m,the influence of the boundary effect can be disregarded.

主 题 词：pavement cushion silt subgrade wetting boundary effect mechanical response 

学科分类：08[工学] 0814[工学-地质类] 082301[082301] 0823[工学-农业工程类] 

核心收录：

D　O　I：10.3969/j.issn.1003-7985.2024.03.006

馆 藏 号：203153703...