岩溶管道动水灌浆密封技术研究

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-05-17 DOI:10.1016/j.conbuildmat.2025.141839

Shuai Liu , Bo Peng , Jie Liu , Yu nan Yang , Meng ran Xiong , Zi Bo Wang

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引用次数: 0

摘要

如何有效地封堵突水已成为工程建设中需要解决的关键问题。通过数值模拟和室内试验，提出了一种新的岩溶管型涌水拦阻工艺，并对拦阻机理进行了探讨。利用有限元软件Comsol对岩溶管道进行了流控降速数值模拟，分析了管道内的流控降速规律。利用自行开发的可视化注浆堵漏模拟试验系统，对磁性水泥-水玻璃双液注浆材料（MCWGGM）控流减速+ 二次注浆堵漏工艺进行了研究，分析了不同工况下注浆堵漏效果。研究结果表明：(1)管道横截面越小，流动控制程度越大，管道内水流速度降低越明显。(2)通过极差分析发现，各评价指标影响因素之间的主次关系为：Fe3O4粉含量>； 动水速度>； 堵塞长度。(3)注浆密封过程中的压力变化分为四个部分：注浆密封区、压力喘振区、冲剪破坏区、流动控制区、减速区。(4)对于二次注浆封堵，各因素对堵水率影响的主次关系为Fe3O4粉含量>； 动水速度>； 堵水长度，最大堵水率为96 %。

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Research on sealing technology of karst pipeline by dynamic water grouting

How to effectively block water inrush has become a key problem to be solved in engineering construction. Through numerical simulation and indoor tests, a new blocking process for karst pipe-type surge water is proposed, and the blocking mechanism is investigated. Finite element software Comsol was used to carry out a numerical simulation of flow control and velocity reduction in the karst pipeline, and the law of flow control and velocity reduction in the pipeline was analyzed. Using the self-developed visual grouting plugging simulation test system, the magnetic cement-waterglass two-liquid grouting material (MCWGGM) flow-control and speed-reducing + secondary grouting plugging process was investigated to analyze the effect of grouting plugging under different working conditions. The findings indicate that (1) the smaller the cross-section of the pipeline, the greater the degree of flow control, and the more obvious the reduction of water velocity in the pipeline. (2) Through range analysis, it is found that the primary and secondary relationships among the influencing factors of each evaluation index are as follows: Fe₃O₄ powder content > dynamic water velocity > plugging length. (3) The change of pressure in the process of grouting sealing is divided into four parts: grouting sealing area, pressure surge area, punching shear failure area, flow control, and deceleration area. (4) For the second grouting plugging, the primary and secondary relationship of the influence of various factors on the water plugging rate is Fe₃O₄ powder content > dynamic water velocity > plugging length, and the maximum water plugging rate is 96 %.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.