CAJ | 학술논문

对于既有重载铁路粉质土路基的加固，高压注浆加固易劈裂路基使浆液扩散不受控制，造成加固不均，且冒浆污染环境，而普通硅酸盐水泥浆液在低压力下又难以渗入粉质土中。从现场路基填料中取样进行颗粒级配分析和液缩限试验，验证了土样为粉质土。通过击实试验得到土样的最优含水率为12.94%，最大干密度为1.804 g/cm3。由可灌性分析可知，在理论上超细水泥浆液较难通过自由渗透进入粉质土。室内模拟注浆试验结果表明，超细水泥低压注浆加固粉质土路基具有可行性。
대우기유중재철로분질토로기적가고，고압주장가고역벽렬로기사장액확산불수공제，조성가고불균，차모장오염배경，이보통규산염수니장액재저압력하우난이삼입분질토중。종현장로기전료중취양진행과립급배분석화액축한시험，험증료토양위분질토。통과격실시험득도토양적최우함수솔위12.94%，최대간밀도위1.804 g/cm3。유가관성분석가지，재이론상초세수니장액교난통과자유삼투진입분질토。실내모의주장시험결과표명，초세수니저압주장가고분질토로기구유가행성。
For strengthening the silty soil subgrade of existing heavy haul railway,high pressure grouting easily splits the subgrade and makes grout diffusion,which results in uneven reinforcement and environment pollution,while the ordinary portland cement slurry is difficult to penetrate in silty soil at low pressure. Through field subgrade filler sampling,this paper did the particle size distribution analysis and liquid shrinkage limit tests,which verified the roadbed filler is silty soil,concluded the optimum moisture content is 12. 94% and the maximum dry density is 1. 804 g/cm3 by soil compaction test,and proved that it is difficult for superfine cement slurry to infiltrate into the silty soil through free penetration in theory by groutability analysis. The laboratory simulation grouting results showed that the low pressure grouting reinforcement of superfine cement for silty soil subgrade is available.