基于注浆模拟的道路基层碱激发材料加固效果研究  

Reinforcement Effect of Road Base Alkali-activated Material Based on Grouting Simulation

作　　者：问鹏辉 王朝辉[1] 张磊[1] WEN Peng-hui;WANG Chao-hui;ZHANG Lei(School of Highway,Chang’an University,Xi’an 710064,China)

机构地区：[1]长安大学公路学院,西安710064

出　　处：《硅酸盐通报》2019年第1期276-282,共7页Bulletin of the Chinese Ceramic Society

基　　金：住房和城乡建设部科学技术项目(2015-K5-019)

摘　　要：为更好地将碱激发材料应用于道路基层注浆加固工程中,开发了室内注浆模拟小型足尺试验装置,测试评价了不同级配水稳碎石基层及不同脱空工况下的碱激发材料注浆加固效果,预测了碱激发注浆材料及其注浆后形成结石体的7 d抗压强度相关关系。结果表明:碱激发注浆材料对于处治水稳碎石基层脱空病害具有良好的适应性,对于间断级配型基层的处治效果更优,其处治后结石体7 d抗压强度可达10. 91～12. 54 MPa,满足重载交通下水稳碎石基层的强度要求;在处治不同脱空程度的基层病害时,整体芯样的抗压强度随着注浆高度的增加而增大,碱激发注浆材料形成结石体早期强度形成速度较快,有利于快速开放交通;注浆后的混合料结石体与注浆材料的7 d抗压强度呈现出较强的相关性。In order to better apply alkali-activated materials in the road base grouting reinforcement engineering,a small full-scale experimental device for grouting simulation was developed,the grouting reinforcement effect of alkali-activated material under cement stabilized macadam base with different gradation and different void conditions were evaluated,the 7 d compressive strength correlation between the alkali-activated grouting material and the mixture stone formed after grouting was predicted.The results show that the alkali-activated grouting material has good adaptability to the void reinforcement of cement stabilized macadam base.It has better treatment effect for the gap graded base,and the 7 d compressive strength can reach 10.91-12.54 MPa after the reinforcement,this can meet the strength requirements of cement stabilized macadam base under heavy traffic.When reinforce the road base with different degrees of void diseases,the strength of the overall core sample increases with the increase of the grouting height,and the early strength formation rate of the alkali-activated grouting material is faster,which is conducive to early traffic opening.There is a strong correlation for 7 d compressive strength of the mixture stone after grouting and the alkali-activated grouting material.

关 键 词：道路工程 注浆模拟 碱激发材料 加固 

分 类 号：U418[交通运输工程—道路与铁道工程]