宁夏工程技术2023，Vol.22Issue(4)：320-327,336,9.
宁夏滨河路基盐渍化粉土的动力特性
Dynamic Characteristics of Saline Silt in the Road Base along Binhe Road in Ningxia
摘要
Abstract
Saline silt is used as the roadbed material for Binhe Avenue in Ningxia.Due to overloading and geological reasons,diseases such as frost boiling and subsidence have occurred in the pavement base layer.Taking the saline silt of the Binhe roadbed as the research object,dynamic load tests under two conditions,with and without salt content,were conducted to analyze the impact of salt content on the roadbed silt.Firstly,the disease characteristics of the roadbed were summarized,and the hydrogeological environment in which the roadbed is located was analyzed.Secondly,the roadbed saline silt was classified according to its chemical composition,salt content,and site type.Finally,the saline silt from Binhe was desalinated,and dynamic load tests were conducted on both the saline silt and the desalinated silt.The dynamic loads were divided into two types of cyclic shear:incremental loading and constant loading.The hysteresis curves,backbone curves,hysteresis loop areas,dynamic modulus of elasticity,and damping ratio under incremental loading were compared,as well as the hysteresis curves,hysteresis loop areas,bidirectional dynamic strain amplitudes,and excess static pore water pressure under constant loading.The results showed that the desalinated soil has higher shear strength and resistance to deformation than the saline soil,and that salt migration design should be well considered when constructing roadbeds in saline areas of Binhe.关键词
滨河粉土/盐渍化/洗盐/逐级加载/恒定动载Key words
riverside silt/salinization/washing salt/step by step loading/constant dynamic load分类
土木建筑引用本文复制引用
马文国,张刚,封少博,杨有贞,董旭光..宁夏滨河路基盐渍化粉土的动力特性[J].宁夏工程技术,2023,22(4):320-327,336,9.基金项目
国家自然科学基金项目(51768059) （51768059）
宁夏自然科学基金项目(2021AAC03095,2022AAC03106) （2021AAC03095,2022AAC03106）
宁夏回族自治区重点研发计划项目(2021BEG03023) （2021BEG03023）
