Innovative Technology of Horizontal Protective Shield Arrangement Using Injection

Meneylyuk, Aleksandr; Petrovskiy, Anatoliy; Borisov, A.Yu.; Nikiforov, A. I.

doi:10.13167/2017.15.4

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…At the beginning of the design of the Karkheh Dam and Hydropower Plant Project, curtain injection was suggested to control the foundation seepage below the dam. [1] However, after thorough on-site injection tests and extensive financial studies, implementation of a cutoff wall was considered as another option for sealing of the dam foundation. The reason for the selection of this approach was the slow implementation of the project using the "curtain injection" method, in addition to the economic and technical problems.…”

Section: Introductionmentioning

confidence: 99%

Construction and Monitoring of Cement/Bentonite Cutoff Walls: Case Study of Karkheh Dam, Iran

Faridmehr

YazdaniPour²,

Jokar³

et al. 2019

Studia Geotechnica Et Mechanica

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Water seepage is one of the most important features of embankment dams. To prevent and reduce seepage, it is necessary to seal the dam. Plastic concrete cutoff walls are one of the most efficient methods in waterproofing the foundation of embankment dams on permeable alluvial substrates. Sufficient resistance to loads, low permeability to maintain dam sealing, high ductility compatible with the foundation and deformation under load without cracking are the main requirements in plastic concrete cutoff walls. In this paper, the construction and implementation of the cutoff wall of Karkheh Dam, which is one the world's largest water sealing projects, was studied. In addition, a numerical model using Seep-3D software was developed to evaluate the efficiency of the cut-off wall to decrease the seepage over the dam's foundation. The numerical results validated by instrumentation statistics resulted from 17-years dam operation. According to the results, after the drainage of the reservoir, the cutoff wall optimally reduced the hydraulic gradient by 0.08 from 2.35 and the water leakage by 3.1 m/s from 18.3 m/s.

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Section: Introductionmentioning

confidence: 99%

Construction and Monitoring of Cement/Bentonite Cutoff Walls: Case Study of Karkheh Dam, Iran

Faridmehr

YazdaniPour²,

Jokar³

et al. 2019

Studia Geotechnica Et Mechanica

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“…The most relevant for the construction of underground antifiltration shields are technologies using horizontal directional drilling. The injection technology by A. Petrovsky [7] involves the con struction of a series of pilot wells, with the help of which an injection solution is supplied, which turns the soil layer into the antifiltration shield. However, due to the lack of a working tool, it is impossible to say with certainty that after the applica tion of this technology the continuity of the shield is ensured, which leads to the need for excessive consumption of the in jection solution.…”

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confidence: 99%

Choosing injectable solution for auger technology of underground space protection against pollution

Meneylyuk¹,

Nikiforov²,

Menejljuk³

et al. 2020

Nauk. visn. nat. hirn. univ.

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Purpose. The research is devoted to the experimental choice of injection composition for auger technology of installation of underground anti-filtration shields under the source of pollution. The auger technology for the arrangement of an anti-filtration shield consists of pilot holes made by the horizontal directional drilling, which is followed by the arrangement of a waterproof layer by replacing the soil with auger by special concrete solution. Methodology. The main research method is experimental-statistical modeling, which includes conducting laboratory tests; correlation-regression analysis of the obtained data; qualitative, quantitative and graphical analysis of the obtained regularities of the studied indicators change from the varied factors. Findings. The main results of the study are the following: substantiation of the relevance of the development of the auger technology for the protection of underground space; development of methods and conducting laboratory experiments in choosing the injectable solution; analysis of experimental and statistical regularities of changes in water absorption and time of plastic strength setting when varying the composition of the anti-filtration shield (concentration of fiber, bentonite, water glass); development of the concept of technology of the anti-filtration shield arrangement. Originality. Experimental studies made it possible to establish that the minimum water absorption of the shied samples is observed at the lowest concentration of fiber (0.5%), bentonite (1%) and liquid glass (2%) in the injected solution. For structures of small width (1020m), there are suitable compositions with a minimum time of plastic strength setting at a concentration of fiber (3%), bentonite (5%) and water glass (18%). For structures with a large width (4060m), there are suitable compositions with a long time of plastic strength at a concentration of fiber (9%), bentonite (5%) and water glass (6%). Practical value. Experimental results made it possible to develop technological recommendations for construction of anti-filtration shields using the auger technology. Namely: to develop a concept and procedure of works, to calculate the costs of labor and machine time, to compile a list of necessary materials, machinery and equipment.

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Innovative Technology of Horizontal Protective Shield Arrangement Using Injection

Cited by 2 publications

References 27 publications

Construction and Monitoring of Cement/Bentonite Cutoff Walls: Case Study of Karkheh Dam, Iran

Construction and Monitoring of Cement/Bentonite Cutoff Walls: Case Study of Karkheh Dam, Iran

Choosing injectable solution for auger technology of underground space protection against pollution

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