无砟轨道铺轨后路基注浆效果检测方法的对比

通过钻芯取样、标准贯入、旁压试验3种检测方法对无砟轨道铺轨后高填方路基深层注浆效果进行了检测并予以对比分析。结果表明:通过提出水泥结石体芯样占比的概念,钻芯取样能够对注浆效果进行半定量分析;标准贯入击数可以定性反映出土体强度是否提高,但难以量化注浆检测效果;旁压试验能够得到注浆前后土体性质参数的变化,对于检测均匀土层的注浆效果适用性良好。

Comparison of Inspection Methods of Grouting Effect for Subgrade After Ballastless Track Laying

Through three inspection methods of core drilling,standard penetration and lateral loading test,the deep grouting effect of high fill subgrade after ballastless track laying was tested and compared.The results show that by putting forward the concept of proportion of cement core samples,the grouting effect can be analyzed semi-quantitatively by core sampling.The standard penetration impact number can qualitatively reflect the improvement of soil strength,but it is difficult to quantify the inspection effect of grouting.The lateral loading test can get the change of soil parameters before and after grouting,and has good applicability for inspecting the grouting effect of uniform soil layer.