陇海线路巉口镇K1642+680～+800段袖阀管注浆加固性能研究

Study on Grouting Reinforcement Performance of K1642+680～+800 Sleeve Valve Tubes in Chankou Town of Longhai Line

本文以陇海线路巉口镇K1642+680^+800段袖阀管注浆加固工程为依托,基于现场治理方案设计分析,通过现场轻型动力触探试验研究,结合现场行车加速度响应实测分析,对袖阀管注浆加固性能进行评价,得到了以下结论:①袖阀管加固区域其浆液与土体凝结,增加了土体的密实度,导致加固区域的土体对振动波吸收较少,其加速度响应情况明显要大于未加固区域各测点的加速度响应情况,间接表明袖阀管注浆方式对铁路路堤的加固起到了良好地作用。②袖阀管注浆加固土体的密实度和承载力随着土体深度的增加而增加,且随着深度增加,土体的承载力变化较大,特别是深度范围在180cm-210cm范围内土体承载力显著增大。

Based on the grouting reinforcement project of section K1642+680^+800 sleeve valve tube in Chankou town of Longhai line,this paper evaluates the grouting reinforcement performance of sleeve valve tube through the light dynamic contact test on site and the field measurement analysis of driving acceleration response.The following conclusions are obtained:①Sleeve valve pipe reinforcement area the slurry condensation with the soil,increase the soil compactness,lead to the vibration wave absorption of soil in the reinforcement area is less,the acceleration response is obvious than unreinforced area acceleration response of each measuring point suggests sleeve valve tube grouting method for railway embankment reinforcement has played a good role.②The density and bearing capacity of soil reinforced by sleeve valve tube grouting increase with the increase of soil depth,and with the increase of depth,the bearing capacity of soil varies greatly,especially in the depth range of 180cm-210cm.