花管注浆改进碎石土的性能研究

Study on Improving the Performance of Gravel Soil by Using the Flow-tube Grouting

注浆钢花管能起到改良土体、承受荷载的功能,还能提高土体的抗渗性能,在目前的基坑和边(滑)坡支护工程中应用越来越多。其主要应用方式包含承受拉力的钢锚管和承受侧向荷载的钢花管桩,而在施工过程中因注浆引起的桩周土体性能变化关注较少。依托丰台某基坑工程,在碎石土场地做袖阀管注浆,比较注浆前后土体参数的变化,揭示了注浆带来土体加固效果,为后期工程应用提供参考。

Pray of molten steel pipe grouting soil improvement, bear the function of load, also can improve the permea- bility of soil properties, in the foundation pit and edge （slide） in slope supporting engineering application more and more. Its main applications include sustain tension steel anchor pipe and spray of molten steel pipe pile under lateral load, and in the con- struction process caused by grouting pile soil properties change less attention. In this paper, based on a certain foundation pit project of Fengtai, do the sleeve valve tube grouting in the gravel soil, compared before and after the change of the soil parame- ters, grouting reveals the grouting reinforcement effect of soil, provide reference {or later engineering application.