注浆法治理公路黄土暗穴病害的试验研究  

A Study on Grouting Treatment of Highway Loess Hidden Cavity

作　　者：刘妮娜[1] 门玉明[1] 陈志新[1] 彭建兵[1] 

机构地区：[1]长安大学地质工程与测绘工程学院,陕西西安710054

出　　处：《灾害学》2009年第2期87-90,共4页Journal of Catastrophology

基　　金：交通部西部重点交通建设科技项目(200131881213);长安大学科学基金(0305-1001)

摘　　要：注浆法是公路工程中治理暗穴的一种新方法。针对湿陷性黄土地区公路工程中大量发育的暗穴病害,通过室内浆液材料物理力学性能试验与工程现场模拟注浆效果试验,分析了以水泥为主剂的注浆材料在不同配合比情况下治理公路工程中暗穴的效果。室内外试验结果分析表明:浆液水灰比在2.5∶1~1.5∶1之间较为适宜;在不影响路基路面的正常压力下有效的加固半径是1.0 m^1.5 m;在特殊情况下为了使浆液快速凝结可以加入一定量的水玻璃作为速凝剂;可以采用二次注浆加强治理的效果。The grouting is a new way in treating the highway hidden cavity. As a large number of hidden cavities exist in the loess area, on the basis of indoor test on physical and mechanical performance of grouting materials and field test on efficacy of simulating grouting, the effectiveness of cement as the main material with the others in different ratios in highway hidden cavity treatment is analyzed. The result shows that the proper ration of water and cement is between 2.5：1 and 1.5： 1. Under the normal pressure with no influence on roadbed and road surface, the effective radius is 1.0 m to 1.5 m. The soluble water is good for congealing in special conditions.Twice grouting has better effectiveness than that of one grouting.

关 键 词：公路工程 暗穴治理 注浆法 湿陷性黄土 

分 类 号：P642.131[天文地球—工程地质学]