既有砌体房屋修缮中注浆加固技术与墙体稳定性协同优化研究

Research on the Coordinated Optimization of Grouting Reinforcement Technology and Wall Stability in the Repair of Existing Masonry Buildings

摘要

既有砌体房屋在长期服役中受荷载、环境侵蚀及地基变形等因素影响，易出现裂缝、空鼓与强度退化等病害，威胁结构安全。注浆加固以其施工便捷、扰动小、恢复性强的特点，成为砌体修缮的重要技术。本文以既有砌体房屋为对象，分析注浆加固机理及其对墙体稳定性的作用，通过试验与数值模拟揭示浆液扩散规律与结构响应的耦合关系。在材料配比优化与施工参数控制基础上，提出注浆加固与墙体稳定性协同优化方法，实现“加固—防护—耐久”一体化修缮目标。研究结果表明，合理控制浆液黏度、压力与注入速率，可显著提升墙体刚度与抗剪承载力，裂缝闭合率提高约42%，变形协调性增强30%，为既有砌体建筑的安全修缮与可持续利用提供技术支撑。

Abstract

Existing masonry buildings are prone to structural deterioration such as cracks, hollow drumming, and strength degradation due to long-term exposure to loads, environmental erosion, and foundation deformation, posing significant safety risks. Grouting reinforcement, characterized by its construction convenience, minimal disturbance, and strong recovery capability, has become a critical technique for masonry repair. This study focuses on existing masonry buildings to analyze the mechanisms of grouting reinforcement and its impact on wall stability. Through experimental and numerical simulations, the coupling relationship between grout diffusion patterns and structural responses is revealed. Based on optimized material ratios and controlled construction parameters, a synergistic optimization method for grouting reinforcement and wall stability is proposed, achieving the integrated repair goal of “reinforcement, protection, and durability.”The results show that the wall stiffness and shear capacity can be improved significantly by controlling the slurry viscosity, pressure and injection rate, the crack closure rate can be increased by 42%, and the deformation coordination can be enhanced by 30%, which provides technical support for the safety repair and sustainable utilization of the existing masonry building.

关键词

砌体房屋 / 注浆加固 / 墙体稳定性 / 结构修缮 / 协同优化

Key words

Masonry building / Grouting reinforcement / Wall stability / Structural repair / Collaborative optimization

参考文献

[1] 白育龙. 破碎碹体注浆充填加固技术的研究与运用[J]. 山东煤炭科技, 2023, 41(02):29-31.

[2] 曹龙飞. 既有砌体结构墙体钻孔配筋抗震加固方法的研究[D]. 北京建筑大学, 2023.

[3] 王保龙. 沿空留巷爆破切顶及煤体注浆加固技术[J]. 山东煤炭科技, 2021, 39(07):129-131+140.

[4] 石建光. 砌体结构不连续注浆补强加固技术.福建省,厦门大学,2019-09-17.

[5] 砌体注浆加固技术. 福建省, 厦门大学建筑与土木工程学院,2018-01-01.