注浆减沉机理的新认识和注浆系统可靠度分析

New Concept of Subsidence Reduction Mechanism by Grouting and Reliability Analysis of the Grouting System

笔者通过对影响注浆减沉技术效果的分析 ,建立了由浆体单元、钻孔单元、围岩体单元和封孔单元组成子系统的注浆减沉系统 ,以及系统对应的可靠度分析模型 ;运用可靠度理论 ,解析并得出了注浆减沉系统可靠度计算公式 ;依据建立的注浆减沉系统模型 ,借助数理统计和随机过程等工具 ,可以做到比较准确地预测注浆减沉的效果 ,优化注浆参数和改善注浆工艺 ,为减少地下工程开挖损害 ,保护环境和施工安全提供了新的途径。

Through the analysis of factors influencing the effectiveness of subsidence reduction by grouting, the grouting system was divided into grout sub-system, boring sub-system, surrounding rock sub-system and sealing sub-system, and a corresponding reliability model was established. The calculation formula of the grouting system was obtained by referring reliability theory. According to this model, with the aid of mathematical statistics and stochastic process, the effectiveness of grouting could be predicted, grouting parameters could be optimized and grouting technology could be improved, which would provide a new way to reduce excavation damage, to protect the environment and to improve construction safety.