考虑黏度时空变化特性速凝化学浆液渗透注浆机制  

Permeation grouting mechanism of rapid-setting chemical grout considering space-time variation of viscosity characteristics

作　　者：王鹏程 阎学松 孙星亮 刘志春 段远钊 宁志玮 何佳贵 WANG Peng-cheng;YAN Xue-song;SUN Xing-liang;LIU Zhi-chun;DUAN Yuan-zhao;NING Zhi-wei;HE Jia-gui(College of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China;China Railway 15th Bureau Group Corporation Limited,Luoyang,Henan 471013,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]中铁十五局集团有限公司,河南洛阳471013

出　　处：《岩土力学》2024年第12期3668-3680,共13页Rock and Soil Mechanics

基　　金：国家重点研发计划(No.2023YFC3806701)。

摘　　要：速凝双液化学浆液需采用静态混合方式施工,这使得浆液黏度随时间和空间变化而变化。以聚氨酯-水玻璃为典型速凝化学浆液,研究考虑黏度时空变化特性的渗透注浆机制,开展速凝化学浆液黏度时变试验,推导了一维渗透注浆的黏度时空分布方程、渗透运动方程和注浆压力时空演化方程,进一步推导了三维球形和柱形渗透注浆的黏度时空分布方程、渗透运动方程和注浆压力时空演化方程,建立了考虑黏度时空变化特性的球形和柱形渗透注浆理论;将已有的渗透注浆室内试验成果,以及开展的数值模拟研究,与推导的理论公式进行对比分析。根据结果可知,速凝化学浆液黏度随时间呈指数增长,与传统的Karol渗透注浆理论相比,考虑黏度时空变化特性的速凝化学浆液渗透注浆理论所预测的渗透半径更接近试验结果,所描述的渗透注浆现象与数值模拟结果吻合良好,验证了理论的准确性。The rapid-setting two-component chemical grout needs to be achieved by static mixing,resulting in temporal and spatial variations in grout viscosity.We used poliurethane/water glass grout as the typical rapid-setting chemical grout.We studied the permeation grouting mechanism considering space-time variation in viscosity.We conducted the time-varying viscosity test of rapid-setting chemical grout.We derived equations for one-dimensional permeation grouting that describe the space-time distribution of viscosity,permeation motion,and the evolution of grouting pressure.We further derived equations for three-dimensional spherical and cylindrical permeation grouting that describe the space-time distribution of viscosity,permeation motion,and the evolution of grouting pressure.We established a theory of spherical and cylindrical permeation grouting,taking into account the space-time variation of viscosity.We compared the results of laboratory experiments and numerical simulations with the derived theoretical equations.According to the results,the viscosity of rapid-setting chemical grout increases exponentially with time.Compared with the traditional Karol permeation grouting theory,the permeation radius predicted by our grouting theory was closer to the experimental results.The described permeation grouting phenomenon aligned well with the numerical simulation results.The experimental and numerical data collectively validate the precision and accuracy of our proposed theory.

关 键 词：渗透注浆 速凝浆液 化学注浆 黏度时空变化 注浆机制 

分 类 号：TU457[建筑科学—岩土工程]