在软土中注入气溶胶:通过裂缝提高渗透性

IF 5.6 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL Acta Geotechnica Pub Date : 2024-07-05 DOI:10.1007/s11440-024-02356-2
Hui-ming Wu, Quan-kun Ma, Yue Liu, Yong He, Ci Song, Ning Ma, Xiao-fei Lin
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引用次数: 0

摘要

在我们最近的论文中,我们报告了气溶胶喷射技术的开发和应用,以加速软土的固结。气溶胶注入技术是一种向软土中注入高压空气以形成裂缝网络,从而提高渗透性的过程。本文介绍了在三轴装置中对带有预制裂缝的软土试样的渗透性进行的实验研究。研究重点是渗透率随时间的变化。考虑了一些主要影响因素,如断口粗糙度、约束压力、预固结压力、土壤结构和矿物成分。渗透率随时间的降低主要是由于软土中的自愈机制,这种自愈机制是由土壤变形和密闭压力及水力梯度驱动的细粒迁移所决定的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Aerosol injection in soft soils: permeability enhancement by fractures

In our recent paper, we reported the development and application of the aerosol injection technique to accelerate the consolidation in soft soils. Aerosol injection technique is a process that involves injecting air under high pressure into soft soil to create a network of fractures, which gives rise to enhanced permeability. In this paper, we present an experimental study on the permeability of soft soil specimens with pre-made fractures in a triaxial device. Some emphasis is given to the variation of permeability with time. Some major influence factors are considered, e.g. the fracture roughness, confining pressure, pre-consolidation pressure, soil structure and mineral composition. The decrease in permeability with time is mainly due to the self-healing mechanism in soft soils, which is dictated by the soil deformation and migration of fines driven by the confining pressure and hydraulic gradient.

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来源期刊
Acta Geotechnica
Acta Geotechnica ENGINEERING, GEOLOGICAL-
CiteScore
9.90
自引率
17.50%
发文量
297
审稿时长
4 months
期刊介绍: Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.
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