摘要
注浆材料固化放热除了会影响岩土体温度场进而产生温度应力外，还会对浆液流动特性及过程产生影响，注浆过程的热、流、固全耦合分析对于揭示裂隙岩体注浆效果具有重要意义．在建立热、流、固全耦合分析方法的基础上，以高自生热材料聚氨酯为研究对象，考虑多物理场参数的耦合动态变化，研究了孔隙裂隙岩体的注浆过程，揭示了温度、浆液在孔隙介质和裂隙介质中的传递，浆液流动特性及含裂隙多孔介质结构响应．结果表明：当裂隙开度大于孔隙介质等效微渗流通道宽度时，注浆压力在孔隙介质和裂隙介质中，优先沿裂隙介质传递，并给出了一种初步判断孔隙介质等效渗流通道宽度数量级的方法；聚氨酯浆液固化放热，浆液优先在裂隙介质中产生强热对流；注浆过程中渗流场和结构场起主导和控制作用，浆液自生热产生的温度场对注浆过程有一定影响，但主要表现为对浆液流动特性的影响，而温度扩散范围则较为有限．
The grouting material curing exothermic will affect temperature field of rock mass and temperature stress; and it can also affect the flow characteristics of the slurry. Grout flow, heat flow and solid coupling analysis is of important significance for revealing the effect of grouting in fractured rock mass. Based on fluid-solid-heat full coupling analysis method, with high self-heating material polyurethane as the research object, considering the dynamic changes of coupled multi-physics parameters, this paper studies the grouting process in fractured rock mass transfer, reveals the temperature, slurry in pore medium and fractured medium, the flow characteristics of the slurry and response of fractured structure porous media. The results show that the grouting pressure preferentially transfers along the fracture medium, and then presents a method to determine the initial pore medium flow channel width equivalent magnitude. Slurry heat preferentially in fractured medium produced strong convection. In the process of grouting seepage field and structure field plays a leading and controlling function; the temperature field of heat generating slurry, the grouting process has certain effect; but mainly for the influence of the flow characteristics; and the temperature in the rock pore medium diffusion. On this basis, the numerical results are further dis- cussed and analyzed, which can provide a reference for grouting design.
作者
崔溦
李永杰
戚蓝
黄小龙
刘灿平
党彦
CUI Wei;LI Yongjie;QI Lan;HUANG Xiaolong;LIU Canping;DANG Yan(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China;Inner Mongolia Road and Bridge Group Co.,Ltd.,Hohhot 010051,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2018年第11期941-949,共9页
Engineering Journal of Wuhan University
基金
国家自然科学基金创新研究群体科学基金(编号:51321065)
国家自然科学基金(编号:51279126)
天津市自然科学基金(编号:13JCQNJC06800)
关键词
高自生热材料
多孔介质
注浆
数值模拟
热流固耦合模型
high self-heating material
porous media
grouting
numerical simulation
coupled thermohydro-mechanical model
