改进型袖阀管注浆在黄河冲积层地基加固中的应用

Application of Improved Sleeve Valve Pipe Grouting in Foundation Reinforcement of Yellow River Alluvium

摘要:

袖阀管注浆是建筑地基加固工程中常用的手段。但是，传统的袖阀管设备存在密封圈和袖阀管内壁之间贴合不密实而易导致注浆压力偏小的缺点。本文对传统袖阀管设备进行改进，并依托济南市某黄河冲积层地区建筑地基加固工程，进行改进型袖阀管的注浆效果试验研究。结果显示，改进型袖阀管在济南黄河冲积层地区建筑地基加固中应用效果良好。与传统型袖阀管相比，改进型袖阀管的最大注浆压力提高了1.3倍，注浆时间节省了22%。采用改进型袖阀管后，浆液骤降和孔口返浆几率大大降低，密封圈与袖阀管管壁跑浆的问题得到彻底解决。

Abstract:

Sleeve valve pipe segment grouting is a commonly used method in building foundation reinforcement projects. However, traditional sleeve valve tube equipment has some disadvantages, such as the sealing ring and the inner wall of the sleeve valve tube are not tightly attached, which will easily lead to a low grouting pressure. In this paper, traditional sleeve valve pipe equipment has been improved. Relying on the foundation reinforcement project in a certain Yellow River alluvium area in Ji'nan city, the grouting effect test study of the improved sleeve valve pipe has been carried out. It is showed that the improved sleeve valve tube has a good application effect in building foundation reinforcement in the alluvial zone of the Yellow River in Ji'nan city. Comparing with traditional sleeve valve tube, the maximum grouting pressure of the improved sleeve valve tube has increased by 1.3 times, and the grouting time has saved by 22%. After adopting the improved sleeve valve tube, the probability of slurry drop and orifice reflow is greatly reduced, and the problem of slurry running between the sealing ring and the sleeve valve tube wall has been completely solved.