EP3673116B1 - Procédé et installation de bétonnage d'un site souterrain - Google Patents

Procédé et installation de bétonnage d'un site souterrain Download PDF

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Publication number
EP3673116B1
EP3673116B1 EP18742775.2A EP18742775A EP3673116B1 EP 3673116 B1 EP3673116 B1 EP 3673116B1 EP 18742775 A EP18742775 A EP 18742775A EP 3673116 B1 EP3673116 B1 EP 3673116B1
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EP
European Patent Office
Prior art keywords
concrete
liquid
column
transportation pipe
site
Prior art date
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EP18742775.2A
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German (de)
English (en)
French (fr)
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EP3673116A1 (fr
Inventor
François PINEAU
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Agence Nationale pour la Gestion des Dechets Radioactifs ANDRA
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Agence Nationale pour la Gestion des Dechets Radioactifs ANDRA
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/28—Treating solids
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/28—Treating solids
    • G21F9/30—Processing
    • G21F9/301—Processing by fixation in stable solid media
    • G21F9/302—Processing by fixation in stable solid media in an inorganic matrix
    • G21F9/304—Cement or cement-like matrix

Definitions

  • the invention relates to a method and an installation for the concreting of a site located in an underground site at great depth.
  • the invention relates to a method and an installation for the concreting, at great depth, of the disposal cells for radioactive waste, of the connecting galleries and of the access galleries to these disposal cells. , access to these galleries is through a borehole.
  • the document CN 202627535U describes a method of concreting an underground site comprising the vertical delivery of concrete from a supply site located at an altitude above the underground site to the underground site by a continuous supply of concrete from a delivery tube between the supply site and the underground site, lowering a concrete column into the delivery tube and taking concrete from a lower end of said concrete column to distribute the concrete in the underground site .
  • the document WO 2004/038172 describes a concreting installation for an underground site, comprising a single vertical borehole receiving a pipe for conveying concrete from a supply site to the underground site, a movable shutter housed in the conveying pipe and a circuit hydraulic to fill the delivery tube under the shutter with liquid and extract the liquid under the shutter from the delivery tube by exerting a vertical counter-thrust on said shutter.
  • the invention aims to remedy these technical problems by proposing means suitable for ensuring, in a reliable and secure manner and over a very long period, the descent and the conveying of the concrete from the surface to the gallery and to the cells of. waste storage located at great depth.
  • This goal is achieved by means of a method of concreting an underground site comprising the vertical delivery of concrete from a supply site located at an altitude above the underground site to the site. underground by continuously feeding concrete from a delivery pipe between the supply site and the underground site, lowering a concrete column into the delivery pipe and taking concrete from one end lower part of said concrete column to distribute the concrete in the underground site, characterized in that the delivery tube is initially filled with a column of liquid and a movable shutter positioned at the top of the column of liquid, then exerted, during the descent of the concrete column in the routing tube, a vertical counter-thrust on said shutter by adjusting the height of the liquid column and / or the pressure of the liquid in the routing tube in order to control the descent of the concrete column.
  • the height of the liquid column and / or the pressure of the liquid are adjusted by drawing or drawing off the liquid at a lower end of the delivery tube.
  • Gravity withdrawal can in particular be implemented, by controlling the opening of a valve located at the lower end of the delivery tube, and by taking advantage of the gravitational force applied by the concrete column on the shutter, pushing the latter away.
  • a bidirectional pump can also be used which extracts the liquid at a controlled rate.
  • the drawing or drawing off of the liquid is stopped when the movable shutter reaches the base of the delivery tube.
  • the continuous supply of concrete is made by injecting concrete under pressure from the surface at the latest as soon as the concrete column reaches the base of the tube.
  • the method of the invention comprises a phase of interrupting the concreting of the underground site, comprising stopping the injection of concrete and cleaning of the conveying tube by raising the movable shutter and the liquid under pressure to the feed site.
  • the cleaning liquid is recycled to the process after decantation and filtration.
  • the height of the liquid column and / or the pressure of the liquid is controlled by varying the opening of a valve and / or by varying the flow rate of a pump in a control circuit. liquid.
  • the delivery tube is cooled by an ascending flow of compressed air in an enclosure surrounding the delivery tube.
  • Another object of the invention is an installation for concreting an underground site, comprising at least a first vertical borehole receiving a conveying tube for the transfer of concrete from a supply site located at an altitude above the underground site. to the underground site, characterized in that it further comprises a movable shutter housed in the delivery tube and a liquid circuit comprising a conduit for supplying a pressurized liquid housed in a second vertical borehole is intended to fill the delivery tube under the shutter with liquid and to extract from the delivery tube said liquid under the shutter by exerting a vertical counter-thrust on said shutter.
  • the liquid circuit is connected to a lower end of the delivery tube.
  • the liquid circuit is a closed circuit comprising means for recycling the liquid.
  • the borehole is provided with a liner delimiting a cylindrical enclosure around the conveying tube in which detection and measuring instruments are arranged.
  • the installation comprises at least two shut-off drawers with double-hatch, a first of the two shut-off drawers being mounted on the surface on an upper end of the tube ensuring the supply of concrete from it.
  • a first of the two shut-off drawers being mounted on the surface on an upper end of the tube ensuring the supply of concrete from it.
  • a second of the two shut-off sliders being mounted at the bottom of the well on a lower end of the delivery tube, coupled to a concrete pick-up pump.
  • the installation further comprises a third stop drawer mounted in the gallery downstream of the second drawer and ensuring the distribution of the concrete.
  • the liquid circuit comprises at least one pump ensuring the pressurization of the liquid which is supplied at the surface, by one or more reservoirs intended for the storage and recycling of the liquid.
  • a complementary characteristic relates to the structure of the movable shutter which comprises a cylindrical body carrying circumferential ribs the diameter of which corresponds substantially to the internal diameter of the delivery tube and provided with an insert detectable by means.
  • the method and the concreting installation according to the invention make it possible to ensure continuous lubrication of the conveying tube leading to a regular, controlled and controlled descent of the concrete followed by subsequent cleaning of the tube using a closed liquid circuit, without risk of concrete spreading or backing up.
  • the liquid used in the hydraulic circuit thus performs three functions, respectively, of retarding the concrete column, independent lubrication of the delivery tube during descent and cleaning at the end of concreting.
  • This liquid is preferably water (or an aqueous fluid), which is taken up, sanitized, which provides substantial savings in charges, simplifies the casting process at the bottom of the well and preserves the environment.
  • the method of the invention consumes very little water because the liquid circuit is equipped with filtering and recycling means.
  • the process of the invention makes it possible to minimize the risks of spreading and leaking liquids or water at the bottom of the well, which makes the concreting process particularly clean.
  • the process of the invention makes it possible to limit the risks of segregation of the concrete, to avoid cement deposits and to do away with the use of a slip.
  • the concreting installation of the invention is, moreover, self-lubricating because the concrete conveying tube is constantly immersed or in contact with the fresh concrete.
  • the invention also provides for the joint presence of means ensuring the rapid and real-time detection of malfunctions and of means exercising the necessary corrective actions including, the partial or total emptying of the conveying tube and the raising of the concrete towards the surface in case of refusal of the waste.
  • the figures 1A and 1B illustrate a preferred embodiment of the concreting method of the invention with an installation with a single borehole F ( figure 1A ) or two boreholes F1, F2 connected in U ( figure 1B ).
  • the method of the invention is more particularly intended for the concreting of an underground site used for the storage of radioactive waste.
  • the underground storage site generally consists of storage cells (not shown) arranged within a network of access and connection galleries located at great depth. The mechanical reinforcement of these storage cells and the various galleries is carried out by concrete conveyed by means of the installation schematically shown on the diagram. figure 1 .
  • the solution adopted by the invention consists in conveying the concrete B using at least one borehole in which is housed a so-called conveying tube A intended to last several years with frequent periods of intense concreting.
  • the concreting installation of the invention therefore comprises, in a traditional manner, at least one vertical borehole F receiving a tube A for conveying the concrete B from a supply site to an underground site located at a lower altitude. at the feeding site.
  • the supply site is located near a CB concrete plant (preferably positioned on the surface) and ensures the continuous supply of concrete B from the delivery tube A leading to the underground site located at great depth .
  • the delivery tube A ensures, for its part, the descent of the concrete column B and is connected to a device allowing the withdrawal of concrete from a lower end of this column to distribute the concrete in the underground site ( to see figure 2 ).
  • the concrete is transported to the disposal cells via the borehole F and underground galleries via a network of pipes or conveyors (trolleys or mobile buckets).
  • the installation of the invention further and specifically comprises a movable shutter 1 ( figures 3A, 3B and 4 ), for example in the form of a shell, housed in the conveying tube A and a liquid circuit L (or hydraulic circuit), intended to control the rate of descent of the concrete B in the tube A by ensuring, of a hand, pressurizing the liquid exerting a vertical counter-thrust on the shutter 1 and, on the other hand, the withdrawal of this liquid.
  • a movable shutter 1 for example in the form of a shell, housed in the conveying tube A and a liquid circuit L (or hydraulic circuit), intended to control the rate of descent of the concrete B in the tube A by ensuring, of a hand, pressurizing the liquid exerting a vertical counter-thrust on the shutter 1 and, on the other hand, the withdrawal of this liquid.
  • the liquid circuit (or hydraulic circuit CH) is connected to the conveying tube A of the concrete near the bottom of the well and consists of a closed circuit comprising at least one hydraulic pump PH1, PH2 ensuring the pressurization and the withdrawal of the liquid L.
  • the hydraulic pumps PH1, PH2 are supplied at the surface, by at least one reservoir (or cistern) C1, C2 of liquid.
  • Additional filtration and / or settling means D coupled to a valve V allow the recycling of the liquid L in the installation, as illustrated by the dotted lines on the figures 1A , 1B .
  • At least one hydraulic pump makes it possible to generate the counter-thrust on the shutter 1 in order to balance the system (Jurin tube).
  • This pump can operate in depression to facilitate the descent of the concrete column B as it can operate in high pressure to raise the shutter 1 and all or part of the concrete column B to the surface, if necessary.
  • a pressure gauge or pressure sensor (pressiometer) CP associated with a PS purge ( figures 1A and 1B ), is placed in the underground gallery or on the surface in order to measure the discharge pressure of the liquid L in the hydraulic circuit CH.
  • the drilling head is adapted to receive a volume of concrete passing continuously, possibly under pressure.
  • the concrete conveying device consists of an external steel liner C ( figure 4 ) for the protection of the borehole F and the inner tube A for conveying the concrete made of stainless steel and ensuring the transit of the concrete B.
  • Stainless steel makes it possible to reduce friction, reduce viscosity forces and minimize corrosion .
  • the empty space located between the outer wall of the inner tube A for conveying the concrete and the inner wall of the liner C of the borehole F then delimits an annular or cylindrical intermediate chamber E in which electromagnetic detection and measurement instruments are placed M. These instruments make it possible to follow the descent of concrete B continuously and to ensure the correct functioning of the installation.
  • the tube A is cooled by an ascending air flow S, possibly compressed, which passes into the annular enclosure E around the outer wall of the tube A and which is taken from an air intake PA connected to the base of the tube TO ( figures 1A , 1B ).
  • a self-supporting optical fiber P in a spiral around the routing tube A.
  • This optical fiber monitors the temperature distributed over the entire length of the tube, but also measures the mechanical deformations of the latter.
  • pressure sensors (not shown) arranged on the outer surface of the delivery tube. These sensors can be placed at regular intervals every 5 to 10 meters.
  • the instruments M, P also make it possible to follow the kinetics and the kinematics of the mobile shutter 1, as described below. They thus make it possible to know the progress of the descent of the concrete column B into the tube A and to control the three essential and successive operations of the process which will be described in detail subsequently, namely; lubricating the internal concrete conveying tube, lowering the concrete column and then cleaning the tube after concreting the underground storage site.
  • the movable shutter 1 is intended to be introduced into the pipe A for conveying the borehole head and is positioned at the top of the liquid column L. This shutter separates the cement phase from the liquid phase (aqueous) L and descends vertically. under the weight of the concrete column B.
  • the movable shutter 1 one embodiment of which in the form of a shell is illustrated by the figures 3A and 2B , comprises a cylindrical body 11 provided with circumferential ribs 12 whose diameter corresponds substantially to the internal diameter of the tube, a head 13 and a frustoconical base 14 offering a thrust or traction face for the liquid delivered by the hydraulic circuit .
  • the base 14 preferably has a bevelled or pointed profile to facilitate the descent of the shutter 1 into the tube A.
  • the head 13 offers a truncated or frustoconical face intended to support the base of the concrete column B.
  • the ribs 12 in the form of radial fins improve the scraping of the wall of the tube A during the cleaning of the installation and ensure axial retention of the shutter 1 during its descent as well as stability during the balance of the pressures.
  • the frustoconical base 14 has an interior cavity 140 optimizing the application of the counter-thrust force exerted on the shutter F by the liquid L under pressure ( figure 4 ).
  • the body 11 of the shutter 1 is provided with an insert, for example, in the form of a ring G mounted here between the ribs 12, which is electromagnetically detectable by the instruments M previously described.
  • This insert is functionally integrated into the electronic control-command or supervision circuit Y of the installation with a view to monitoring the travel of the movable shutter 1 in the routing tube A as well as the detection of its passage through the shut-off drawer.
  • the transmission of the detection signal of the insert thus allows the operator to actuate, from the surface, the opening or closing of the valves of the shut-off slide located at the base of the borehole F.
  • the insert with electromagnetic properties is, for example, in the form of a ball embedded in the body of the movable shutter 1.
  • the installation is also equipped with at least two shut-off drawers with double hatch T1, T2.
  • a first shut-off drawer T1 is mounted on the surface or at the concrete feed site, on an upper end of the delivery tube A.
  • a second shut-off drawer T2 is mounted at the bottom of the well on a lower end of the delivery tube, possibly coupled to a concrete recovery pump PB2 ( figures 1A , 1B and 2 ).
  • the installation further comprises a third shut-off drawer T3 mounted in the gallery downstream of the second drawer and ensuring the distribution of the concrete to the storage site, as illustrated by the figures 1A , 1B .
  • the equipment located at the base of the borehole and, in particular, the shut-off drawers are dimensioned and adapted to receive the concrete column under pressure.
  • an additional filter is fitted at the bottom of the well, in the concrete reception gallery, to purify the liquid from the primary hydraulic circuit.
  • the latter is provided with a pump PB1 for injecting concrete at the surface, the power of which is approximately 200 KW.
  • the PB2 concrete recovery and distribution pump is placed in the access gallery to the storage cells and has a power of around 400 KW.
  • the detection system connects the hydraulic pump PH1 for pressurizing the liquid, the concreting pump PB1 ensuring the injection of the concrete and the hydraulically controlled shut-off sliders T1, T2, T3 located, respectively, on the surface and in the underground concrete reception gallery.
  • the installation is monitored and controlled with all its components from the surface from a dedicated CO control station.
  • the control system can be automated and centralized. All the Y information acquired along the concrete conveying tube is continuously stored in an acquisition center. Any malfunction sufficiently significant thus leads to immediate intervention by the standby operator in the control station.
  • the hydraulic circuit CH (in solid lines) comprises a liquid supply pipe L housed in a single borehole F also containing the concrete delivery pipe A B. This pipe is then placed in the vicinity or around the internal pipe A concrete routing.
  • the hydraulic circuit CH (always in solid lines) comprises a liquid supply duct housed in a vertical borehole F2 disposed at a distance from the borehole F1 in which the concrete conveying tube A is arranged.
  • the liquid pipe of the borehole F1 is connected to the lower part of the tube A for conveying the concrete and therefore to the borehole F1, forming a U-shaped double-borehole.
  • the boreholes must be watertight and strong enough to withstand hydraulic pressure.
  • this method provides for vertically conveying the concrete from a supply site located at an altitude higher than the underground site and to the underground site by a continuous supply of concrete from a conveying tube A placed at the bottom. 'inside the borehole F and ensuring the descent of a concrete column B then take the concrete sample from a lower end of the concrete column to distribute the concrete in the underground site.
  • the concrete is taken from the bottom of the well from the lower end of this column to transport it to the disposal cells.
  • the method of the invention aims to overcome the technical problems generally encountered in such operations.
  • the method consists, more particularly, in initially filling the concrete conveying tube with a liquid L (preferably water) before introducing therein a movable shutter 1 of the type described above and illustrated by the figures 2A and 2A .
  • a liquid L preferably water
  • the height of the liquid column and / or the liquid pressure is adjusted by withdrawing the liquid from a lower end of the delivery tube by varying the opening of a valve and / or by varying the flow rate by one. pump mounted on the hydraulic circuit, in order to control, in particular, the rate of descent of the concrete column.
  • the final stage of the process consists in taking the concrete at the base of the conveying tube to bring it and distribute it in the underground storage gallery where the cells containing the waste to be concreted are located.
  • the operator is able to detect installation malfunctions, directly trigger the openings and closings of the shut-off drawers, directly adjust the pump flow rates and reassemble the pump. shutter 1 to evacuate the concrete column from the borehole as quickly as possible.
  • the single borehole or the two U-shaped boreholes are first completely filled with liquid L (phase at rest).
  • the inner tube A for conveying the concrete is therefore constantly lubricated by the liquid L and it is therefore not necessary to use cement slip.
  • the shutter of the stopper drawer T1 located on the surface is in the closed position to prevent the flow of concrete.
  • the shut-off drawer door T2 located at the base of the delivery tube A is also in the closed position so that the liquid cannot drain into the concrete pump PB1.
  • the trap door of the stop drawer T1 located on the surface opens to allow the concrete to flow while the other trap door closes.
  • shut-off spool hatch T2 located at the base of the casing, opens so that clean liquid L can pass into the primary hydraulic circuit in order to provide the counter-thrust during the following steps.
  • the second step begins with the introduction into the inner tube A for conveying the concrete and from the feed site and, generally, from the surface, of the movable shutter 1.
  • This step continues with the continuous supply, for example, from the surface and the plant CB, of the internal concrete conveying tube B by gravity or by injection under pressure by means of a pump if necessary.
  • the vertical conveyance of the concrete is facilitated by the slow descent of the column of liquid in the tube, managed by the activation of the hydraulic pump PH1 in depressurization thus causing the suction of the liquid towards the bottom of the tube A and favoring the shutter descent 1.
  • the flow rate of the concrete injection pump PB1 is increased to increase the pressure of the concrete column and facilitate its descent into the delivery tube.
  • the pressure of the liquid is adjusted from the surface of the well and its withdrawal is carried out from the base of the concrete delivery tube A.
  • the operator From the central control station CO located on the surface, the operator ensures the appropriate balance between the heights and / or the respective pressures of the concrete column B and of the liquid column L and takes care to maintain a rhythm regular descent of concrete.
  • Optical and / or electromagnetic sensors (for example of the type of the previously described sensors P, M), arranged at the level of the stop slide T2, detect the passage of the movable shutter 1, the position of which coincides with the level of separation of phase between liquid L and concrete B.
  • the lower end of the routing tube A is connected to the shut-off spool T2 by means of a welded male flange A2 and clamps A3.
  • a receptacle A1 of the movable shutter 1 shell
  • a lifting angle CE for the intervention of a forklift (not shown) circulating in the underground gallery of the site .
  • the passage of the shutter 1 through the drawer T2 then triggers an alarm signal which is transmitted to the control station CO located on the surface and which signals to the operator the arrival of concrete at the base of the conveying tube. TO.
  • the operator stops the hydraulic pump n ° 1 to stop the withdrawal of the liquid. If necessary, the concrete column is then balanced with the pressure of the liquid.
  • the hydraulically operated shut-off slide with single slide T2 (preferably set at 120 bars), which was until now closed to allow the circulation of the liquid, opens to release the concrete which then flows into a tank of 'waiting and / or directly in a tank (not shown) supplying the distribution pump PB2.
  • This step continues as long as the descent of the concrete lasts and the installation can then operate in a steady state, if necessary, for a very long period, taking into account the volumes of concrete required for the concreting campaigns of the storage site, including the construction is gradual.
  • the descent of the concrete is ensured continuously thanks to the pressure exerted by the concrete pump PB1 located at the level of the supply site located, for example, on the surface and which is fed by the concrete plant CB.
  • the hydraulically controlled double shut-off drawer T1 located on the surface and drawer T2 located in the reception gallery are open to allow the concrete to pass through.
  • the PB2 concrete pump coupled to a third hydraulic shut-off slide T3 and double slide ensures the distribution and selective distribution of the concrete in the various galleries and storage cells.
  • the operator monitors the descent of the concrete by reading and continuously analyzing the control parameters of the concrete column, as defined previously and measured along the conveyance tube A.
  • the invention provides for the possibility of carrying out a phase of interrupting the concreting of the underground site.
  • this phase the concrete injection is then stopped, followed by cleaning of the conveying tube by raising the movable shutter and the pressurized liquid to the supply site.
  • the delivery tube is emptied as completely as possible by letting the concrete column descend by simple gravity.
  • the routing tube inside the borehole is then insulated and is ready for cleaning which is ensured by the return of the liquid under pressure.
  • the hatch of the double shut-off spool T2 is then open allowing the liquid to circulate while the hydraulic pump PH1 is actuated.
  • the pressurized liquid L causes the shutter 1 with the column of liquid to rise from the base of the borehole to the surface. It is possible to add a foam ball in the delivery tube to reinforce the scraping and increase the cleaning efficiency.
  • the laitance which is deposited on the walls of the delivery tube is then raised by the shutter.
  • the cleaning liquid loaded with cement and used flows into the settling tank C2 and is thinned out by passing through a filtration system D equipped with a particulate filter, a guillotine valve V and of the hydraulic pump PH2 which is placed between the settling tank C1 and the hydraulic pump PH1 (see figures 1A and 1B ).
  • This liquid can then be introduced again into the primary circuit by activating the hydraulic pump PH1.
  • the conveyor tube A is then again filled with liquid and is ready for a second concreting campaign.
  • the management of the malfunctions of the installation is carried out as follows according to characteristic aspects of the method of the invention.
  • the borehole and, more particularly the conveying tube can be cooled by a flow of air, possibly compressed, directed from bottom to top so as not to disturb or alter the circuit. conventional ventilation cycle for underground installations.
  • the rate of descent of the concrete column can be accelerated by opening the shut-off drawers and / or by activating the hydraulic pump PH1.
  • the process can be slowed down by closing the shut-off sliders and / or by activating hydraulic pump n ° 1.
  • the decision to stop the process and, in particular, the conveying of the concrete can be taken by the operator very quickly on the basis of information and signals sent by detection and measurement instruments integrated in the borehole.
  • the operator can then empty the conveyor tube A as completely as possible and recover the concrete B in a tank placed in the gallery. This action leads to optimal lightening of the concrete column, thus allowing the hydraulic back-thrust system to be more efficient.
  • pressurizing the liquid by activating the hydraulic pump PH1 allows the concrete column to be raised. in whole or in part in a reactive and rapid manner.
  • the unblocking of the concrete column is carried out from the bottom to the top and not in the reverse direction which would lead to a detrimental clamping of the concrete in the conveying tube.
  • Concrete of density 2.4 is injected with a flow rate of 25 m 3 / h in a concrete conveying tube 506 meters deep and 152.5 mm internal diameter.
  • the descent speed of the concrete column is 60 km / h and the mass of the column is 21.6 tonnes for a volume of 9 m 3 .
  • the static pressure at the base of the borehole is 120 bars.
  • the inside diameter of the delivery tube A is between 120mm and 200mm and is preferably 152.5mm with an outside diameter of 177.8mm.
  • the internal diameter of the sleeve C of the borehole F is between 200 and 300 mm and is preferably 224.4 mm with an external diameter of 244.5 mm.
  • the intercalary cylindrical space intended to house the control and command instruments M, P is therefore 46.6 mm.
  • the linear mass of the conveyor tube A in stainless steel is 52.12 kg / m and that of the sleeve C (also in stainless steel) is 59.57 kg / m.
  • the pressure of the liquid L (for example water) in the borehole increases by 1 bar every 10 meters.
  • the pressure is therefore 51 bars taking into account an atmospheric pressure of 1 bar.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Inorganic Chemistry (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
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  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Lining And Supports For Tunnels (AREA)
EP18742775.2A 2017-08-22 2018-07-17 Procédé et installation de bétonnage d'un site souterrain Active EP3673116B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1757806A FR3070416B1 (fr) 2017-08-22 2017-08-22 Procede et installation de betonnage d’un site souterrain
PCT/EP2018/069368 WO2019037958A1 (fr) 2017-08-22 2018-07-17 Procédé et installation de bétonnage d'un site souterrain

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EP3673116A1 EP3673116A1 (fr) 2020-07-01
EP3673116B1 true EP3673116B1 (fr) 2021-08-04

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EP (1) EP3673116B1 (zh)
CN (1) CN110998031B (zh)
FR (1) FR3070416B1 (zh)
WO (1) WO2019037958A1 (zh)

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CN114215018B (zh) * 2022-01-18 2023-05-09 中国水利水电第七工程局有限公司 一种混凝土浇筑施工保温棚
CN114892596B (zh) * 2022-04-11 2023-07-18 河南水建集团有限公司 一种水利护坡斜面浇筑施工设备
CN117684753A (zh) * 2024-02-01 2024-03-12 邢台炬能铁路电气器材有限公司 一种防飞溅式垂直输送混凝土装置

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FR3070416A1 (fr) 2019-03-01
FR3070416B1 (fr) 2020-01-10
CN110998031A (zh) 2020-04-10
EP3673116A1 (fr) 2020-07-01
CN110998031B (zh) 2021-12-10
WO2019037958A1 (fr) 2019-02-28

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