Grouting sealing mechanism of water gushing in karst pipelines and engineering application

Li, Haiyan; Zhang, Yuchuan; Wu, Jing; Zhang, Xiangyu; Zhang, Lewen; Li, Zhaofeng

doi:10.1016/j.conbuildmat.2020.119250

Cited by 28 publications

(9 citation statements)

References 30 publications

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“…Under the condition of elastic-plastic criticality, the resistance at x = 0 just reaches the interface ultimate bonding strength. Let τðxÞ = τ 1 , when substituted into (17), the ultimate compressive stress of the elastic state is…”

Section: Geofluidsmentioning

confidence: 99%

“…At this time, the pressure acting on the elastic part is σ Pe1 , and the length of the elastic stage is l − x e . From (17), the distribution law of shear stress in the elastic bonding section is…”

Section: Geofluidsmentioning

confidence: 99%

“…The water plugging technology of the water passage grouting has been successfully applied in the water disaster control work of every large coal mine in China. But at present, the research on the dynamic water grouting mainly focuses on the grouting technology and the grouting material [11][12][13][14][15][16][17]. And the research on the water barrier mechanism of the moving water of the water passage is very few.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Research and Numerical Simulation on Water Resistance Mechanism of Textile Bag in Water Passage

Yang

Zhu

et al. 2021

Geofluids

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It is an important problem in the mine water disaster prevention and control to control the large passage moving water. Traditional grouting technology is to put coarse aggregate and fine aggregate downward first and then grouting treatment. But the aggregate and cement flow distance is long, consumption is large, cost is high, and easy to appear secondary water inrush. Centering on the technical difficulties in the rapid construction of the blocking body of the moving water passage, a water-blocking textile bag was invented. The purpose of blocking the tunnel water inrush was achieved by grouting inside the bag body, which fundamentally realized the rapid blocking of the large passage through water under the condition of moving water. However, the mechanism, water plugging law, and design parameters of water blocking roadway with textile bag are still unclear. In this paper, the slip law and stability of the textile bag in the moving water and the deformation characteristics caused by the dynamic water pressure are theoretically analyzed and simulated. Through theoretical analysis, the ultimate antihydraulic stress value of a textile bag of a certain specification is calculated, and the parameters of the textile bag that affect the stability of the bag body are also determined. Xflow was used for numerical simulation analysis to study the deformation characteristics of the textile bag under water and the law of water barrier. The simulation analysis focuses on the water resistance effect and flow field distribution characteristics of the textile bag in the water passage under the condition of low flow rate and low pressure, as well as the stability and self-deformation characteristics of the textile bag under the condition of high flow rate and high pressure. The accuracy of the limit resistance to water pressure of the textile bag obtained from theoretical analysis is verified. The results show that the theoretical analysis is consistent with the simulation results. The textile bag can realize the fast controllable plugging of the large water passage of moving water within the limit of the antihydraulic stress.

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Section: Geofluidsmentioning

confidence: 99%

Section: Geofluidsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Theoretical Research and Numerical Simulation on Water Resistance Mechanism of Textile Bag in Water Passage

Yang

Zhu

et al. 2021

Geofluids

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“…Scholars in China and abroad have conducted numerous studies on ultrafine cement. Li et al [11] developed an improved construction solid waste cement grouting material. The results show that when the mixing amount of modified construction solid waste cement grouting material waste red brick powder is 40-60%, the fluidity performance of grouting sealing material is the best.…”

Section: Introductionmentioning

confidence: 99%

Fluidity Influencing Factors Analysis and Ratio Optimization of New Sealing Materials Based on Response Surface Method

Guo

Xue

et al. 2021

Geofluids

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The borehole sealing material is one of the key factors affecting the gas drainage effect of a borehole. This paper takes the compressive strength, fluidity, expansion rate, and setting time of the sealing material as the main research indicators and explores the influence of each key influencing factor on the performance of the high-fluid sealing material through the single factor experiment method. Using the Design-Expert 8.0.5 Trial software designed orthogonal experiments and establishing a quadratic model between liquidity and each test factor, which showed the impact of each key factor on the fluidity. Finally, by adjusting the amount of admixtures, the optimal ratio of high-fluidity borehole sealing materials was obtained. The results showed that the key factors had the following order of significance: water – cement reducing agent > water – cement ratio > retarder > expansion agent . With the water-cement ratio and the amount of water reducing agent increase, the fluidity of the material will increase; and with the increase of the retarder and expansion agent, the fluidity will decrease. In actual use, the fluidity is the main factor, but the expansion rate, compressive strength, and setting time are also considered. The optimal percentages were found for the high-fluidity borehole sealing material: a water-cement ratio of 1, along with 0.03% retarder, 0.5% water reducer, and 8% expansion agent. These research results could provide a reference for improving the performance of gas drainage borehole sealing materials and enhancing the effect of gas drainage.

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“…The results showed that the viscosity of mud inburst in the mud did not depend on the particle size but on the moisture content. Li et al [42] studied the plugging mechanism and method of water inrush in karst passages through numerical simulation, laboratory experiments, and engineering and analyzed the changing law of water flow velocity.…”

Section: Introductionmentioning

confidence: 99%

Grouting Treatment of Water and Mud Inrush in Fully Weathered Granite Tunnel: A Case Study

et al. 2020

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When mountain tunnel passes through completely weathered granite strata, water and mud inrush is easy to occur, causing casualties and economic losses. Grouting is a common and effective treatment method for water and mud inrush disaster. The current existing researches focus on theoretical analysis, numerical simulation, and laboratory test, and the researches based on the field of engineering application are few. Based on the fully weathered granite tunnel of Junchang tunnel in Guangxi, this paper studies the grouting treatment of water and mud disaster in the fully weathered granite tunnel. This paper first introduces the geological and hydrological conditions of Junchang tunnel in order to understand the causes of water inrush and mud inrush. Then, the treatment method of full-section curtain grouting is introduced. During the grouting, the combination of exploration and injection is adopted. According to different hydrological conditions, different kinds of grouting materials are adopted. After grouting is completed, Transient Electromagnetic Methods, water inflow analysis, borehole investigation, and P-Q-T method are used to evaluate the grouting effect. According to the reaction of the detection results, the weak part of grouting can be supplemented to improve the grouting quality. The results show that the curtain grouting is effective for the treatment of water-mud inrush disaster in the fully weathered granite tunnel. This study provides a reference for the treatment of water and mud inrush in other similar tunnels.

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Grouting sealing mechanism of water gushing in karst pipelines and engineering application

Cited by 28 publications

References 30 publications

Theoretical Research and Numerical Simulation on Water Resistance Mechanism of Textile Bag in Water Passage

Theoretical Research and Numerical Simulation on Water Resistance Mechanism of Textile Bag in Water Passage

Fluidity Influencing Factors Analysis and Ratio Optimization of New Sealing Materials Based on Response Surface Method

Grouting Treatment of Water and Mud Inrush in Fully Weathered Granite Tunnel: A Case Study

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