砾石土层中注浆扩散参数的研究

采用注浆模拟试验与数值分析等研究方法，探讨了砾石土层中注浆的注浆量、浆液扩散半径及注浆形成的结石体抗压强度等参数预测计算模型，并设计试验对其进行了验证。试验结果表明，砾石土层中注浆的注浆量、浆液扩散半径及结石体的抗压强度等参数预测计算模型计算的注浆量、浆液扩散半径与注浆结石体抗压强度的理论值与试验实测值间虽分别有10%、5%、10%左右的差异，但均相差不大，因此，可用来预测砾石土层实际注浆工程中的注浆量、浆液扩散半径及注浆形成的结石体的抗压强度等参数。研究成果不仅可为砾石土层实际注浆工程实践提供理论支撑，还可为砾石土诱发的滑坡、泥石流等灾害的防灾减灾提供技术参考。

Study of grouting diffusion parameters in gravel soil

Based on grouting simulation experiments and numerical analyses, the formulations are established for predicting grouting amount, grout diffusion radius and compressive strength of stone body in the gravel soil; the proposed formulations are validated by indoor grouting experiments. Experimental results show that there are about 10%, 5% and 10% differences respectively between the theoretical values of grouting amount, grout diffusion radius and compressive strength of stone body and their actual measurement values; but these differences valuse are admitted. So, the formulation can be used to predict grouting amount, grout diffusion radius and compressive strength of stone body in actual grouting engineering of gravel soil. Therefore, the research results may not only provide theoretical supports for actual grouting engineering of gravel soil, but also provide technical references for disaster prevention and mitigation of landslide and debris flow induced in the gravel soil.