硅酸盐通报2025，Vol.44Issue(7)：2406-2418,2436,14.DOI:10.16552/j.cnki.issn1001-1625.2024.1550
基于净浆流变理论的富水砂层注浆加固试验研究
Grouting Reinforcement of Water-Rich Sand Layers Based on Paste Rheological Theory
摘要
Abstract
Grouting reinforcement is a common method to solve the liquefaction problem of water-rich sand soil in tunnels.Currently,traditional grouting materials have poor mechanical properties,low compressive strength,and high brittleness.There is relatively little research on the impact of the flow performance of grouting materials on the grouting reinforcement effect.This study designed a grouting reinforcement test for sand soil based on the rheological properties of grouting materials.Portland cement,fly ash,and polycarboxylate superplasticizer were used as raw materials,and high mechanical properties self-compacting paste was used as the grouting material for grouting simulation and on-site engineering tests.The study revealed the impact of the flow performance of grouting materials on grouting pressure,grouting diffusion range,and the mechanical properties of sand soil.The results show that self-compacting paste is an excellent grouting material with high compressive strength and high dynamic elastic modulus,and it has the characteristic of controllable flow performance.The slump flow of the paste is directly proportional to grouting pressure,grouting volume,and the lateral diffusion range of grouting.The viscosity of the slurry is inversely proportional to grouting pressure and vertical diffusion depth.Finally,improvement suggestions are proposed for the grouting method of water-rich sand layers from the aspects of single-hole grouting volume and grouting process.Self-compacting paste shows significant reinforcement effects in on-site grouting tests and is conducive to its wide application in the field of foundation reinforcement.关键词
地震液化/富水砂层/可控注浆/自密实净浆/扩散规律/地基加固Key words
seismic liquefaction/water-rich sand layer/controlled grouting/self-compacting paste/diffusion law/foundation consolidation分类
建筑与水利引用本文复制引用
王喆,犹伟,李鹏飞,梁其旻..基于净浆流变理论的富水砂层注浆加固试验研究[J].硅酸盐通报,2025,44(7):2406-2418,2436,14.基金项目
重庆市教委科学技术研究项目(KJQN202400732) （KJQN202400732）
