高速公路盐渍土地区路基地基改良研究  

Study on Improvement of Subgrade Foundation in Saline Soil Area of Expressway

作　　者：张朝晖[1,2] 师百垒[2] 李宗利 ZHANG Zhaohui;SHI Baile;LI Zongli(College of Water Conservancy and Architecture Engineering,Northwest A＆F University,Yangling,Shaanxi 712100,China;College of Transportation and Mapping Engineering,Yangling Vocational and Technical College,Yangling,Shaanxi 712100,China)

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]杨凌职业技术学院交通与测绘工程分院,陕西杨凌712100

出　　处：《公路工程》2018年第3期52-56,共5页Highway Engineering

基　　金：国家自然科学基金项目(51379178);陕西省科学技术研究发展计划项目(2012K01-32);2016杨凌职业技术学院自然科学研究基金及产学研基地建设项目(A2016017)

摘　　要：以某高速盐渍土路为研究对象,对其改良。研究表明:采用二灰和三灰改良盐渍土具有良好的改良效果,均能达到设计要求。随着各配比粉煤灰掺量增加,二灰改良盐渍土无侧限抗压强度随之增加;在粉煤灰和石灰具有相同掺量时,随水泥掺量的增加,三灰改良盐渍土的无侧限抗压强度随之增大。盐渍土的改良采用石灰+粉煤灰的二灰稳定技术,在施工过程中,由于不同地域的土质差异较大,因此要展开针对性的设计方案,在提高设计强度的同时,向其中加入水泥,从而降低工程成本。In this paper,a high-speed saline soil roadbed in Gansu is taken as an example. The research shows that using two ash and three ash to improve saline soil has good effect of improvement,and all of them can meet design requirements. With the increase of fly ash content,the unconfined compressive strength of the two ash improved saline soil increased. When the fly ash and lime had the same volume,the unconfined compressive strength of the three ash improved saline soil increased with the increase of cement content. The improved saline soil engineering using two ash stabilization technology of lime and fly ash,in the construction,according to soil differences,the specific design composition,if the design strength is increased,the amount can be added in the cement foundation design of strength to meet,will reduce the cost of engineering.

关 键 词：粉煤灰 盐渍土 改良 抗压强度 路基 

分 类 号：U416.1[交通运输工程—道路与铁道工程]