In-situ Test and Calculation Method for Horizontal Deformation of Soil Induced by Multi-row Grouting

IF 3 3区工程技术 Q2 ENGINEERING, GEOLOGICAL

Canadian Geotechnical Journal Pub Date : 2023-11-17 DOI:10.1139/cgj-2023-0394

Xuesong Cheng, Linsong Zhao, Shengzhang Han, Yetao Ji, Zhaorong Xu, Lingbo Meng, Jun Pan, Gang Zheng, Ruikun Wang

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引用次数: 0

Abstract

Multi-row grouting can be used to repeatedly mitigate the deformation of critical structures like tunnels. Nevertheless, no comprehensive investigation into the development patterns of soil deformation and excess pore water pressure, induced by multi-row grouting in soft soil, has been conducted to date. To address this gap, this study carried out a field test of multi-row grouting, systematically exploring the evolution and accumulation of soil horizontal displacement (SHD) and excess pore water pressure (EPWP) resulting from multi-row grouting. The findings demonstrated that the grouting process during multi-row grouting respectively exerted reaction and shielding effects on the subsequent grouting for the behavior of soil surrounding the grouting area. The reaction and shielding effects increased proportionally with the number of grouted rows. To predict the SHD induced by multi-row grouting, considering the reaction and shielding effects, this study provided a theoretical calculation method based on cavity expansion theory and the concept of upper and lower bounds, and proposed an optimal grouting scheme.

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多行灌浆诱发土壤水平变形的原位测试和计算方法

多排注浆可用于反复缓解隧道等关键结构的变形。然而，迄今为止，尚未对软土中多排注浆诱发的土壤变形和过大孔隙水压力的发展模式进行全面研究。针对这一空白，本研究进行了多排注浆的现场试验，系统地探讨了多排注浆引起的土壤水平位移（SHD）和过剩孔隙水压力（EPWP）的演变和累积。研究结果表明，在多排注浆过程中，注浆区周围土壤的行为对后续注浆分别产生了反作用和屏蔽作用。反作用和屏蔽效应随着灌浆行数的增加而成正比增加。为了预测多排注浆引起的 SHD，考虑到反作用和屏蔽效应，本研究提供了一种基于空腔扩展理论和上下限概念的理论计算方法，并提出了一种最佳注浆方案。

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来源期刊

Canadian Geotechnical Journal 地学-地球科学综合

CiteScore

7.20

自引率

5.60%

发文量

163

审稿时长

7.5 months

期刊介绍： The Canadian Geotechnical Journal features articles, notes, reviews, and discussions related to new developments in geotechnical and geoenvironmental engineering, and applied sciences. The topics of papers written by researchers and engineers/scientists active in industry include soil and rock mechanics, material properties and fundamental behaviour, site characterization, foundations, excavations, tunnels, dams and embankments, slopes, landslides, geological and rock engineering, ground improvement, hydrogeology and contaminant hydrogeology, geochemistry, waste management, geosynthetics, offshore engineering, ice, frozen ground and northern engineering, risk and reliability applications, and physical and numerical modelling. Contributions that have practical relevance are preferred, including case records. Purely theoretical contributions are not generally published unless they are on a topic of special interest (like unsaturated soil mechanics or cold regions geotechnics) or they have direct practical value.

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