考虑浆液时空变化的幂律型流体劈裂注浆机理研究  

Study of Mechanism of Power-law Fluid Splitting Grouting Considering Change of Slurry Space and Time

作　　者：李占先[1] 

机构地区：[1]中铁十四局集团有限公司,济南250014

出　　处：《建筑技术开发》2016年第10期96-99,共4页Building Technology Development

摘　　要：注浆技术在各种工程建设中的应用广泛,但其理论研究远落后于工程实践。基于平板裂缝模型及幂律型流变方程,考虑浆液的时空变化,推导出幂律型流体劈裂注浆浆液质点锋面压力计算公式,并分析其适用范围及参数确定方法,为劈裂注浆提供理论依据。研究结论:劈裂注浆浆液锋面压力与起始注浆压力,劈裂裂缝宽度,粘度时空变化系数,流变指数,注浆速率等参数有关;分析浆液质点锋面压力的时空分布规律,得到浆液质点锋面压力随着注浆时间的增大、浆液质点扩散距离的增大而逐渐较小;结合劈裂注浆浆液锋面压力计算结果对工程实例讲行分析,阐述了注浆压力与时间的变化规律。Grouting technology is widely used in all kinds of engineering construction, but its theoretical research is far behind the engineering practice. Based on tabulate fracture model and power-law rheologicalequation, considering the spatial-temporal variations of the slurry, the calculation formula of the pressure of the front slurry particle is deduced, and analyzed its applicable scope and parameter determination method to provide a theoretical basis for splitting grouting. Research conclusion, the pressure of the front slurry particle is in connection with pressure of initial grouting, width of split crack, coefficient of spatial-temporal variations, theological index, grouting rate. Analysing the temporal and spatial distribution of the pressure of the front slurry particle, we get that the pressure decereases with the increasing of grouting time and the slurry particle diffusion. According to the calculation result of splitting grouting pressure, analysing the engineering example, discusses the rules that grouting pressure changes with temperatures.

关 键 词：幂律型流体 时空变化 劈裂注浆 浆液质点锋面压力 

分 类 号：TU753.3[建筑科学—建筑技术科学]