温度对高聚物浆液在裂隙中扩散特性影响研究  

Study on effect of temperature on diffusion characteristics of polymer slurry in a fracture

作　　者：李晓龙[1,2] 桂云祥 贾赫扬 钟燕辉[1,2] 张蓓[1,2] Li Xiaolong;Gui Yunxiang;Jia Heyang;Zhong Yanhui;Zhang Bei(School of Water Conservancy and Transportation,Zhengzhou University,Zhengzhou 450001,China;National Local Joint Engineering Laboratory of Major Infrastructure Testing and Rehabilitation Technology,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学水利与交通学院,河南郑州450001 [2]郑州大学重大基础设施检测修复技术国家地方联合工程实验室,河南郑州450001

出　　处：《土木工程学报》2025年第1期111-125,共15页China Civil Engineering Journal

基　　金：国家自然科学基金(52178401);河南高校科技创新团队支持计划(23IRTSTHN014);中原英才计划(234200510014);河南省2021年水利科技攻关项目(72)。

摘　　要：具有自膨胀特性的高聚物注浆材料已广泛应用于岩体加固工程,但关于其注浆机理尚缺乏深入认识。近期试验研究表明,温度对自膨胀高聚物浆液的流动扩散过程具有显著影响,原因在于温度变化会改变高聚物浆液化学反应进程,进而影响其扩散行为。为深入揭示温度对高聚物浆液在裂隙中扩散行为的影响机制,以一种工程中应用的自膨胀聚氨酯高聚物浆液为对象,基于浆液聚合反应机理和计算流体动力学理论,用准三维有限体积法离散浆液流动控制方程,用三维有限体积法离散裂隙壁热传导方程,建立模拟分析高聚物浆液在裂隙中膨胀扩散过程的热-流耦合仿真模型,实现对浆液化学反应进程、流场和“浆液-裂隙”体系温度场的耦合求解。开展不同注浆量、预热温度条件下无水平板裂隙高聚物注浆模型试验,通过浆液扩散范围、密度、温度等实测数据与计算结果的对比,验证所建立数值模型的适用性。在此基础上,分析预热温度、环境温度对浆液在平板裂隙中扩散行为的影响,结果表明,相同环境温度条件下,随着浆液预热温度升高,浆液扩散速率及升温速度加快,峰值温度增大,达到峰值点时刻越早;相同预热温度条件下,环境温度越高,浆液扩散速率越快,扩散半径越大;当浆液预热温度或环境温度升高至一定值时,浆液最终扩散范围不再发生明显改变;随着环境温度降低,所需的浆液最低预热温度逐渐增大。该文工作对高聚物裂隙注浆浆液预热温度设定具有一定指导作用。Self-expanding polymer grouting materials have been widely used in the rock reinforcement projects,but there is a lack of in-depth understanding of their grouting mechanism.Recent experimental studies have shown that temperature has a significant effect on the flow and diffusion process of self-expanding polymer slurry,because temperature changes alter the chemical reaction process of polymer slurry,which in turn affects its diffusion behavior.In order to deeply reveal the influence mechanism of temperature on the diffusion behavior of polymer slurry in cracks,a kind of self-expanding polyurethane polymer slurry applied in engineering is taken as the object.Based on the mechanism of slurry polymerization reaction and the theory of computational fluid dynamics,the quasi-three-dimensional finite-volume method is used to discretize the control equation of the flow of the slurry,and the three-dimensional finite-volume method is used to discretize the heat transfer equation of the crack wall.A coupled thermal-fluid system is established to simulate the expansion and diffusion process of the polymer slurry in the cracks.A coupled thermal-fluid simulation model is then established to simulate and analyze the expansion and diffusion process of the polymer slurry in the fissure,and the coupled solution of the chemical reaction process of the slurry,thus the flow field and the temperature field of the"slurry-fissure"system is realized.The model test of polymer grouting without horizontal plate fissure under dfferent grouting volume and preheating temperature was carried out,and the applicability of the established numerical model was verified by comparing the measured data of slurry diffusion range,density and temperature with the calculation results.On this basis,the influence of preheating temperature and ambient temperature on the diffusion behavior of slurry in flat plate cracks was analyzed.The research results show that under the same ambient temperature conditions,with the increase of slurry preheating temperature,t

关 键 词：自膨胀高聚物 裂隙注浆 扩散机理 温度 试验 仿真方法 

分 类 号：TU578[建筑科学—建筑技术科学]