岩土力学2024，Vol.45Issue(2)：340-352,13.DOI:10.16285/j.rsm.2023.0216
基于颗粒破碎特性的盐岩集料基层级配组成设计研究
Gradation composition design of salt rock aggregate base based on particle breakage characteristics
摘要
Abstract
To achieve the scientifically designed gradation composition of a salt rock aggregate base in an inland dry salt lake,this study focused on the salt rock in Lop Nur as the research subject.The analysis examined the particle breakage evolution of a single particle group of salt rock aggregate under different particle sizes and brine contents.A gradation transition model for salt rock aggregate under complex gradation was constructed,and a gradation composition design method for salt rock aggregate base was proposed.The rationality of this design method was verified,and the engineering properties of the rock salt aggregate were compared under different gradations and water loss rates.The results demonstrated that all particle groups of the salt rock aggregate experienced breakage during compaction.The gradation of uniformly graded salt rock aggregate tended to stabilize with increasing compaction work.The presence of brine reduced the particle breakage rate of uniformly graded salt rock aggregate.The Weibull distribution effectively characterized the particle breakage distribution characteristics of the salt rock aggregate.The recommended gradation composition design method of salt rock aggregate base successfully deduced the gradation characteristics of salt rock aggregate base and realized the gradation correction considering the influence of brine.Salt crystallization of brine among salt rock particles was conducive to promoting the strength formation of salt rock aggregate base.The unconfined compressive strength of the salt rock aggregate with a water loss rate of 75％reached 4.1 MPa,indicating its suitability for road base engineering in dry salt lake areas.关键词
道路工程/盐岩集料/级配组成设计/基层/颗粒破碎/罗布泊Key words
road engineering/salt rock aggregate/grading composition design/base/particle breakage/Lop Nur分类
交通工程引用本文复制引用
王朝辉,问鹏辉,宋亮,牛亮亮,奚鹤..基于颗粒破碎特性的盐岩集料基层级配组成设计研究[J].岩土力学,2024,45(2):340-352,13.基金项目
交通运输行业重点科技项目(No.2019-MS1-024) （No.2019-MS1-024）
新疆维吾尔自治区自然科学基金(No.2020-D01-A92) （No.2020-D01-A92）
新疆维吾尔自治区交通运输行业科技项目(No.2019-ZD1-015).This work was supported by the Key Science and Technology Program in the Transportation Industry(2019-MS1-024),the Natural Science Foundation Project of Xinjiang Uygur Autonomous Region(2020-D01-A92)and the Transportation Department Science and Technology Project in Xinjiang Uygur Autonomous Region(2019-ZD1-015). （No.2019-ZD1-015）
