A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
ARRANGEMENT OF UNDERGROUND ANTI-FILTRATION SHIELDS USING PILOT WELLS AND AUGER DEVICE
Relevance. One of the ways to ensure ecological safety is the localization of existing and potential sources of pollution by enclosing shield arrangement. For this, it seems rational to install underground anti-filtration shields under the source of pollution, preventing the emission of radioactive waste into the environment, in particular, the pollution of groundwater. This study is devoted to the development of auger technology for arrangement of anti-filtration shield, which 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 special concrete solution by auger. The aim of the research is the experimental substantiation of the efficiency of the auger technology for construction of underground anti-filtration shields to ensure the radiation safety of facilities. Object: installation of underground anti-filtration shields using auger technology. Methods: experimental statistical modeling, laboratory experiment, correlation and regression analysis. Results. For structures of small width (10–20 m), slow concreting is allowed at a speed of 5–6 m/h (angular speed of 1,5 s–1 and feed rate of the composition of 50 m3/h). For structures with a large width (40–60 m), there are suitable compositions with a long time of plastic strength at a concentration of fiber (9 %), bentonite (5 %) and water glass (6 %). In this case, the speed of concreting should be maximum (10–11 m/h at an angular speed of 0,5 s-1 and feed rate of the composition of 30 m3/h). The extremely high speed of concreting is achieved at an angular speed of 1,5 s–1 and a pulling force of 50,96 N. A further increase in the angular speed is not advisable, since at a higher angular speed (more than 1,5 s–1), strong vibrations and ground falls were observed. These experimental results made it possible to develop technological recommendations for construction of anti-filtration shields using auger technology. Namely, to develop a concept and procedure of works, to calculate the costs of labor and machine time.
ARRANGEMENT OF UNDERGROUND ANTI-FILTRATION SHIELDS USING PILOT WELLS AND AUGER DEVICE
Relevance. One of the ways to ensure ecological safety is the localization of existing and potential sources of pollution by enclosing shield arrangement. For this, it seems rational to install underground anti-filtration shields under the source of pollution, preventing the emission of radioactive waste into the environment, in particular, the pollution of groundwater. This study is devoted to the development of auger technology for arrangement of anti-filtration shield, which 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 special concrete solution by auger. The aim of the research is the experimental substantiation of the efficiency of the auger technology for construction of underground anti-filtration shields to ensure the radiation safety of facilities. Object: installation of underground anti-filtration shields using auger technology. Methods: experimental statistical modeling, laboratory experiment, correlation and regression analysis. Results. For structures of small width (10–20 m), slow concreting is allowed at a speed of 5–6 m/h (angular speed of 1,5 s–1 and feed rate of the composition of 50 m3/h). For structures with a large width (40–60 m), there are suitable compositions with a long time of plastic strength at a concentration of fiber (9 %), bentonite (5 %) and water glass (6 %). In this case, the speed of concreting should be maximum (10–11 m/h at an angular speed of 0,5 s-1 and feed rate of the composition of 30 m3/h). The extremely high speed of concreting is achieved at an angular speed of 1,5 s–1 and a pulling force of 50,96 N. A further increase in the angular speed is not advisable, since at a higher angular speed (more than 1,5 s–1), strong vibrations and ground falls were observed. These experimental results made it possible to develop technological recommendations for construction of anti-filtration shields using auger technology. Namely, to develop a concept and procedure of works, to calculate the costs of labor and machine time.
ARRANGEMENT OF UNDERGROUND ANTI-FILTRATION SHIELDS USING PILOT WELLS AND AUGER DEVICE
Aleksandr I. Meneylyuk (author) / Aleksey L. Nikiforov (author) / Ivan A. Meneylyuk (author) / Viktor V. Russyi (author)
2021
Article (Journal)
Electronic Resource
Unknown
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Jointing of two tunnel shields using artificial underground freezing
| Elsevier | 1978