粉细砂地层注浆加固技术的研究进展

Research progress of grouting reinforcement technology in silty fine sand stratum

粉细砂地层在我国大部分地区广泛分布,具有动力荷载作用下易液化、地下空间工程施工扰动下稳定性差的特点,易形成喷涌、滑塌、地面沉降、地基失稳等灾害,注浆加固技术是一种行之有效的防治粉细砂地层灾害的技术方法。本文从粉细砂地层的工程性质、注浆材料选择、注浆方法及理论、实际工程的注浆参数及注浆效果等方面,详细综述了粉细砂地层注浆加固技术的研究进展,并提出了有待研究的问题,其中重点阐述超细水泥、水玻璃注浆材料性质及其工程应用,粉细砂地层注浆方法,劈裂渗透理论,渗透扩散半径计算公式以及注浆技术参数等,为进一步研究粉细砂地层注浆加固技术提供参考。

Silty fine sand stratum is widely distributed in most urban areas of China.This type of stratum is prone to liquefaction under dynamic load and exhibits poor stability during underground engineering construction,leading to potential disasters such as gushing,collapse,ground settlement,and foundation instability.To address these challenges,grouting reinforcement technology has proven to be an effective method for preventing and controlling disasters associated with silty fine sand stratum.In this work,we provided a comprehensive review of the research progress on grouting reinforcement technology in silty fine sand stratum.The review covered various aspects,including the engineering properties of silty fine sand stratum,selection of grouting materials,grouting method and theory,grouting parameters,and grouting dffusion laws.Additionally,we identified key areas for future study.The work mainly focused on describing the properties and engineering applications of ultra-fine cement and water glass grouting materials,the grouting method for silty fine sand stratum,the theory of spliting permeability,the calculation formula of diffusion radius,and grouting technical parameters.This research progress summary establishes a foundation for further investigation into grouting reinforcement technology for silty fine sand stratum,providing support for the disaster prevention and control measures in areas affected by this type of geological formation.