EP3064649A1 - Drainagevorrichtung fuer tiefe böden - Google Patents

Drainagevorrichtung fuer tiefe böden Download PDF

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Publication number
EP3064649A1
EP3064649A1 EP16158051.9A EP16158051A EP3064649A1 EP 3064649 A1 EP3064649 A1 EP 3064649A1 EP 16158051 A EP16158051 A EP 16158051A EP 3064649 A1 EP3064649 A1 EP 3064649A1
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EP
European Patent Office
Prior art keywords
drain
piston
water
pump
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP16158051.9A
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English (en)
French (fr)
Inventor
Jean-Claude Gress
Jean-Baptiste Gress
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Hydro Geotechnique
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Hydro Geotechnique
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Filing date
Publication date
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Publication of EP3064649A1 publication Critical patent/EP3064649A1/de
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00—Keeping dry foundation sites or other areas in the ground
    • E02D19/06—Restraining of underground water
    • E02D19/10—Restraining of underground water by lowering level of ground water

Definitions

  • the present invention relates to a device for draining a soil in depth comprising at least one drain arranged to be positioned in a borehole formed in the ground, said drain comprising at least one closed tube at the top and at the bottom, this tube being provided with a section of pipe that is deep-drawn to communicate with the ground, said drain also comprising means for detecting the level of the water contained in its interior volume and means for evacuating this water towards an outlet as soon as the level of water reaches a predetermined level.
  • the basis of these drainage techniques is to install in the ground either thrown or beaten tubes with a strainer, or drains in vertical or inclined boreholes, to create a drainage line or belt upstream or around. the area to stabilize and drain.
  • These drainage devices make it possible to fold the aquifers, such as for example a sheet of water, that is to say to lower the water level in the aquifers for example to sanitize them.
  • They conventionally comprise filtering needles also called “Well-Point” or “Vacuum Pump”, ejector pumps also called “Ejector”, “Venturi” or “Eductor”, and finally electropneumatic pumps.
  • the drawdown of an underground water table by filtering needles consists of placing rods or drains in parallel and connecting the heads of the rods or drains to a vacuum pump through a pipe and fittings.
  • the major disadvantage of this drainage technique lies in a drawdown limited to 6-8m compared to the altitude positioning of the vacuum pump, ie a limited drainage depth.
  • the drainage by an ejector pump uses a venturi which can be located on the surface or at the bottom of the drain.
  • a venturi which can be located on the surface or at the bottom of the drain.
  • the drawbacks of a limited drawdown similar to those of a drainage by filtering needles appear.
  • the supply and outlet of the venturi are either two separate pipes, or two concentric pipes and it can be effective up to 25m deep.
  • the venturis are fed in series, and therefore do not operate independently of each other. Therefore, some venturis may be required, while there is no water to pump, which may damage them and be useless energy.
  • the electropneumatic drain also called electropneumatic pump, is the subject of the European patent EP 1 182 355 owned by the plaintiff. It comprises a chamber, closed in the upper part, provided in the lower part with a non-return valve and a strainer, and actuated by an inlet of compressed air from a carboy, equipped laterally with a clarinet of valves and recharged to a working pressure by a compressor.
  • a level sensor disposed within the drain chamber allows compressed air to be delivered to the chamber when it is full and to stop the compressed air supply when the chamber is empty.
  • the drain is drained by a pipe that rises to the surface and is connected to the lower part of the chamber; the drain has a non-return valve at the bottom.
  • the limits of drainage by this electropneumatic drain lie in the fact that it can extract only gravity water from the soils traversed by the drain, and that it is limited in depth by the efficiency of the compressor, quantified by its pressure. useful output.
  • the present invention aims at overcoming these disadvantages by proposing a drainage device by means of an improved electropneumatic drain making it possible to improve the effectiveness of the drain in depth, to draw the gravity-fed water into the drain in depression. aquifers where the water to be drained is free, to extract a part of the water bound in the aquifer levels where the water to be drained is not free but linked to the particles of the ground, this device being able to work in drains also vertical well inclined and in all types of media regardless of the surrounding air pressure.
  • the invention relates to a drainage device of the type indicated in the preamble, characterized in that the means for discharging the water contained in the interior volume of said drain comprise at least one pump controlled by the means for detecting the level of water, said pump being provided with a pump body extending inside said stranded section and a piston sliding in said pump body, under the action of a working fluid from a first working fluid circuit, between at least a first position, in which the piston has no action on the water contained in the drain, and a second position, in which the piston expels the water contained in the drain towards the outlet.
  • the means for discharging the water contained in the interior volume of said drain comprise at least one pump controlled by the means for detecting the level of water, said pump being provided with a pump body extending inside said stranded section and a piston sliding in said pump body, under the action of a working fluid from a first working fluid circuit, between at least a first position, in which the piston has no action on the water contained in the drain, and a second position, in
  • the drainage device comprises means for evacuating at least part of said drain, comprising at least one vacuum pump arranged in a technical room and connected to the drain by at least one a start valve and a vacuum pipe leading to in the interior volume of the drain.
  • a manometer may be provided to control the air pressure in the interior volume of the drain.
  • the pump may comprise two superimposed cylinders, including an upper cylinder connected to the first working fluid circuit by at least one high fluid inlet and in which slides an upper mass of said piston, and a lower cylinder connected at its low point to the internal volume of the drain by at least one non-return valve and in which slides a lower mass of said piston.
  • the two cylinders of the pump body may have equal or different diameters.
  • the lower cylinder advantageously has in the upper part a vent protected by a non-return valve arranged to allow air to escape from the lower cylinder and water to rise in said cylinder, avoiding the penetration of water and air from the outside of the cylinder.
  • the means for detecting the water level comprise at least three electrical contacts arranged in the lower cylinder at different levels and electrically coupled to at least one control unit of a solenoid valve. connected to the first working fluid circuit to generate the descent of said piston from its first position to its second position and that as soon as the water reaches the predetermined level to evacuate this water through at least one outlet disposed in the lower part of the lower cylinder and connected to a discharge pipe by means of a non-return valve towards said outlet.
  • the pump may further comprise control means for raising the piston from its second position to its first position.
  • control means for raising the piston from its second position to its first position.
  • These means advantageously comprise a second working fluid circuit opening into the upper cylinder of said pump via a low fluid inlet and electrical contacts. respectively arranged in the lower part of the upper cylinder and under the upper mass of the piston and electrically coupled to at least one control unit of a solenoid valve connected to the second working fluid circuit to generate the rise of the piston in its first position as soon as the piston has reached its second position detected by closing said electrical contacts.
  • This pump may also comprise means for stabilizing the first position of said piston, in the form of at least one magnet cooperating with a metal disk provided one on the high mass of said piston and the other under the top of the upper cylinder of said pump body.
  • the pump may comprise two superposed cylinders, including a lower cylinder connected to said first working fluid circuit by at least one low fluid inlet and in which a lower mass of said piston slides, and an upper cylinder connected at its high point to the interior volume of the drain by at least one non-return valve and in which slides an upper mass of said piston.
  • At least the upper cylinder advantageously comprises in the upper part a vent protected by a non-return valve and arranged to allow air to escape from said upper cylinder and water to mount in said upper cylinder, avoiding penetration water and air from outside said upper cylinder.
  • the means for detecting the water level comprise at least three electrical contacts arranged in said upper cylinder at different levels and electrically coupled to at least one control unit of a solenoid valve. connected to said first working fluid circuit for generating the rise of said piston from its first position to its second position and this as soon as the water reaches the predetermined level to evacuate this water through at least one outlet disposed at the top of said upper cylinder and connected to an exhaust duct by means of a non-return valve towards said outlet.
  • the low mass of said piston is advantageously arranged to drop said piston from its second position to its first position in the absence of compressed air.
  • the pump is a pneumatic pump
  • the working fluid is compressed air
  • the device comprises for this purpose at least one compressor disposed in said technical room and connected to the drain by at least one start valve and one compressed air pipe for supplying compressed air to the first and second working fluid circuits via the solenoid valves.
  • the drainage device comprises a power supply which can also be arranged in the technical room and connected to the drain by at least one bundle of electric cables for supplying at least the control units of the solenoid valves.
  • the drain is advantageously protected by a closed inspection view and arranged to house at least the solenoid valves and the control units. It is thus connected on the one hand to the technical room by at least one protective conduit housing at least the compressed air pipe, the evacuation pipe and the electrical wiring harness, and on the other hand to the outlet by at least one water drain pipe.
  • the drainage device comprises a plurality of drains connected respectively to the technical room on the one hand and the outlet on the other hand by the protective duct.
  • the drainage device 1 generally operates in a network of several drains 2. Each drain head 2 is protected by a manhole 3 closed tightly. And the manholes 3 are interconnected by a protective conduit 4, in particular synthetic material such as PVC, polyethylene or the like, and a technical room 5.
  • a protective conduit 4 in particular synthetic material such as PVC, polyethylene or the like, and a technical room 5.
  • This technical room 5 is supplied with electricity by the electrical network 6 and / or by photovoltaic panels, a wind turbine or any other equivalent means. He is represented in more detail at the figure 2 .
  • the electrical circuit comprises, in the case of a supply by the network, a circuit breaker 7, a fuse panel 8 and a transformer 9 for supplying the solenoid valves provided in the drains 2 with a very low voltage by a bundle of electric cables 10. In the case of a supply by photovoltaic panels or a wind turbine, this electric circuit is also suitable.
  • This technical room 5 can be closed from sealing and temperature controlled by an air conditioner 11 electrically powered by the fuse panel 8 and connected to the external environment by at least one air inlet 11a and an air outlet 11b formed in a wall of the technical room 5.
  • This technical room 5 houses at least one compressor 12 regulating the levels of compressed air in a compressed air cylinder 13, equipped with a starting valve 14 supplying each drain 2 by a general compressed air supply pipe 15.
  • this compressor 12 may be doubled by a backup compressor (not shown).
  • It also houses a vacuum pump 16 regulating the vacuum levels in a vacuum cylinder 17, equipped with a start valve 18 supplying each drain 2 via a vacuum pipe 19.
  • this vacuum pump 16 can be doubled by an emergency vacuum pump (not shown).
  • the protective duct 4 houses in particular the electrical wiring harness 10 for supplying the control circuit of the solenoid valves, the compressed air pipe 15, and the evacuation pipe 19. It also houses a discharge pipe 20 which collects the water drained by each drain 2 and routes them to an outlet 20 '.
  • each drain 2 consists of a tube 21, preferably made of stainless material, PVC or polyethylene, housed in a borehole 22 and provided at the top with a solid pipe section 23, followed by a section of screened pipe 24, then terminated at the bottom by a solid pipe section 25, the bottom of the drain 2 being closed by a bottom plug 26.
  • an inflatable shutter 27 for example consisting of a geo-synthetic material bag or the like, inflated with a bentonite cement grout or the like. This inflatable shutter 27 is inflated, filled with grout, to form a perennial seal between the solid pipe section 23 of the drain 2 and the wall of the bore 22.
  • the space between the solid pipe section 23 of the drain 2 and the drilling wall 22 is then sealed with a sealing grout 28. It is advisable to make this cemented part over a height of at least 5m.
  • the section of stranded tube 24 of the drain 2 is surrounded throughout its height with a filtering device 29 such as a gravure filter or a geo-synthetic draining complex.
  • the geo-synthetic draining complex consists of two layers of draining geotextiles, separated by a cellular plastic structure forming a spacer. This complex is given a cylindrical shape surrounding the stranded tube section 24 of the drain 2.
  • the upper part of the drain 2 is equipped with a hermetic cap 30 closed by a locking system 31.
  • each of the drains 2 is hermetically sealed by a pad 32 supplemented with a plate 33 of insulating material.
  • the buffer 32 is wedged near the ground.
  • Each manhole 3 houses a compressed air distribution duct 34 terminated by a Y surmounted by a manual valve 35, and connected in branch on the compressed air pipe 15 to distribute the compressed air coming from the compressor 12 to the inside of the drain 2 via two solenoid valves EA, EB.
  • a first solenoid valve EA is dedicated to a first compressed air circuit A and a second solenoid valve EB is dedicated to a second compressed air circuit B.
  • Each manhole 3 also houses a water pressure gauge 38 and an air pressure gauge 39.
  • Each drain 2 can be connected to the vacuum bottle 17 by the evacuation pipe 19 which comes from the technical room 5 and passes through the head plug 30 of the drain 2 by a vacuum conduit 40 opening into the upper part of the drain 2 just below the top cap 30.
  • the vacuum pipe 19 may be common to the different drains 2, or be individualized for each of the drains 2. In this case, the connection to the vacuum cylinder 17 is done by a clarinet of starting valves 18. Inside the drain 2 are placed a level sensor vacuum valve 41 connected to the air pressure gauge 39 and a water pressure sensor 42 connected to the water pressure gauge 38.
  • the lock 31 serves to ensure the airtightness of the head cap 30 of the drain 2, in particular when it is connected to the vacuum bottle 17.
  • the advantage of the vacuum of the drain 2 is to attract the gravity water to the drain 2, but also the water bound.
  • the hydrostatic depression, created inside the drain 2 draws the water conventionally towards the drain 2, but in a partial manner.
  • An air gap in the drain 2 even partial, attracts water to the drain 2 systematically.
  • the attraction is even higher than the hydrostatic depression is associated with a strong atmospheric depression. Indeed, the water located in the environment of the drain 2 is charged at its upper part by the atmospheric pressure, while a vacuum is created in the drain.
  • the hydrostatic head that explains the displacement of the water towards the drain 2 is equal to the sum of the hydrostatic head (difference in water levels between the initial environment of the drain and the inside of the drain) and the atmospheric depression.
  • Each drain 2 is equipped with an electrically controlled pneumatic pump 43 for pumping the water drawn into the drain 2 and evacuating it to the outlet 20 '.
  • this pneumatic pump 43 comprises a body consisting of two cylinders 44, 45 superimposed whose diameters are equal or different, and wherein a piston 46 slides axially.
  • the diameter of the lower cylinder 45 is, in the example shown, smaller than the diameter of the upper cylinder 44.
  • lower cylinder 45 comprises, in its lower part, a strainer 47 communicating with a check valve 48 for example floating ball or other equivalent non-return valve, a lower stop 49 preferably cylindrical with damper 50, an outlet port 51 which lateral in which opens a conduit 54 of the pumped water and a high stop 52 provided with a damper 53.
  • This exhaust pipe 54 connected bypass on the discharge pipe 20 housed by the conduit of protection 4 and opening into the outlet 20 ', is equipped at the bottom with a non-return valve 55.
  • the lower cylinder 45 further comprises three electrical contacts C, D, E arranged at different levels to the interior of said cylinder to form a water level detector.
  • the lower cylinder 45 comprises in part high a side vent 56, protected by a non-return valve 57, which allows the air outlet of the lower cylinder 45, but not the water inlet or the air inlet.
  • the upper cylinder 44 of the pneumatic pump 43 comprises, in its upper part, a head plug 58 provided in the lower part of a magnet 59 centered on the axis of said cylinder, as well as a high compressed air inlet 60 from of the compressed air circuit A passing through the solenoid valve EA controlled by the control unit CEA and placed in the inspection window 3.
  • the peripheral lower part of the head cap 58 constitutes a high abutment 61 of annular shape and provided with a shock absorber.
  • This upper cylinder 44 comprises, in its lower part, a connecting piece 62 delimiting a first low abutment 63 of annular shape and provided with two electrical point contacts with lamellae or springs F and G, and a second low abutment 64 of concentric annular shape.
  • this connecting piece 62 is formed a arrival of low air 65 from the compressed air circuit B passing through the solenoid valve EB controlled by the control unit CEB and placed in the inspection window 3.
  • the three electrical wires connected respectively to the three electrical contacts F, G and H are joined in the electric cable CB joining the control unit CEB of the solenoid valve EB.
  • the piston 46 of the pneumatic pump 43 comprises a high mass 67 which slides in the upper cylinder 44 and a low mass 68 which slides in the lower cylinder 45, the two high masses 67 and 68 being connected by a connecting rod 66 which slides in a bore 69 passing through the connecting piece 62.
  • Seals 70 such as O-rings, lip seals, or the like, are arranged around the high masses 67 and low 68 and the connecting rod 66.
  • the high mass 67 comprises on its upper face a spring provided with a metal disc 71 disposed facing the magnet 59 and on its lower face, a central stud carrying an electrical contact K and a damper 72 forming a stop, surrounded by a surface annular carrying two other electrical contacts I and J.
  • the three electrical contacts I, J and K are interconnected inside the high mass 67 by electrical son, the electrical contact I being connected to the contact t electrical K independently of the connection of the electrical contact J to the electrical contact I.
  • one or more drains 2 are positioned in vertical or inclined boreholes provided for this purpose and disposed in line, in an arc or around a critical zone (see FIG. figure 1 ).
  • the drains 2 are connected to the technical room 5, passing the various pipes and cables through the protective duct 4 (see figure 2 ).
  • the cylinders 13 and vacuum 13 are charged in the technical room 5.
  • the valves 35 are closed and the starting valve 14 of the compressor 12 is open to supply the compressed air pipe 15 and the distribution ducts 34
  • the pneumatic pumps 43 are installed inside the drains 2 and the drains 2 are closed by means of the head plug 30.
  • the starting valve 18 of the vacuum cylinder 17 is open to evacuate air at least partially inside each drain 2 through the vacuum pipe 19 to which are connected bypass vacuum ducts 40 opening into each drain 2.
  • the vacuum is controlled by the air pressure gauge 39 disposed in the inspection window 3.
  • the starting valves 35 are then opened to supply compressed air to all the drains 2.
  • the depression that is created inside the drains 2 attracts the water contained in the soil whether it is free, gravity-bound, or similar, which will enter the lower part of the drain 2 through the filtering material 29 of the borehole 22 and the stranded pipe section 24 of the drain 2 (see FIG. figure 3 ).
  • the water thus contained in the drain 2 will enter the lower cylinder 45 of the pneumatic pump 43 through the strainer 47 and the non-return valve 48 (see figure 4 ).
  • the residual air in the lower cylinder 45 is discharged by the ascent of the water and is evacuated by the lateral vent 56.
  • a delay allows it to reach the top of the upper cylinder 44 of the pneumatic pump 43 where a magnet 59 provided on the head cap 58 and a metal disk 71 provided on the high mass 67 of the piston 46 temporarily stabilize the piston 46 before another injection of compressed air by the compressed air circuit A does not return it downwards.
  • Shock absorbers provided on the different stops 52, 61, 63, 64, 72 serve to dampen the shocks inside the two cylinders 44, 45 of the pump body.
  • the seals 70 provide the necessary seals between the moving parts.
  • the vent 56 is provided at the top of the lower cylinder 45, protected by a non-return valve 57 promotes the exit of any indoor air.
  • the air contained in the upper cylinder 44 is evacuated by putting the atmospheric pressure of the circuit A and then of the circuit B alternately.
  • the figure 5 illustrates an alternative embodiment of a pneumatic pump 43 'also intended to equip the drain 2 of the device according to the invention.
  • the pneumatic pump 43 ' has an inverted design with respect to the pneumatic pump 43 described above with reference to the figures 3 and 4 .
  • Turning the pneumatic pump 43 ' substantially simplifies the construction, implementation and operation of the drainage device 1.
  • this new pneumatic pump arrangement 43' makes it possible to eliminate the second compressed air circuit.
  • B consisting of the second supply of compressed air provided by the Y of the air distribution duct 34, the solenoid valve EB, the control unit CEB and the electrical contacts F, G, H, I, J, K, L necessary for driving this second compressed air circuit B and arranged in the upper cylinder 44 of the previous pneumatic pump 43.
  • the pneumatic pump 43 'simplified comprises a body consisting of two cylinders 44', 45 'superimposed whose diameters are either equal or different, and in which a piston 46 'slides axially.
  • the diameter of the lower cylinder 45 ' is greater than the diameter of the upper cylinder 44'.
  • the piston 46 'of the pneumatic pump 43' has a high mass 67 'which slides in the upper cylinder 44' and a low mass 68 'which slides in the lower cylinder 45', the two masses high 67 'and low 68' being connected by a connecting rod 66 'which slides in a bore 69' passing through a connecting piece 62 '.
  • Seals 70 ' such as O-rings, lip seals, or the like, are arranged around the high masses 67' and low 68 'and the connecting rod 66' to seal the pneumatic pump 43 '.
  • the upper cylinder 44 ' has, in its upper part, a head cap 58', provided with a damper 53 'for example annular, forming a high stop 52' for the high mass 67 'of the piston 46'.
  • the head cap 58 ' has an inlet orifice 49' of the pumped water, communicating with the internal volume of the drain 2 via a suction duct 50 'formed in the head cap 58' and opening laterally into the interior volume of the drain 2, terminated by a non-return valve 48 'and a strainer 47'.
  • the non-return valve 48 ' is for example a floating ball valve or any other equivalent non-return valve.
  • the head cap 58 ' also comprises an outlet orifice 51' into which an evacuation duct 54 'of the pumped water opens.
  • This exhaust duct 54 ' is connected bypass to the discharge pipe 20 housed by the protective duct 4 and opens into the outlet 20'. It is equipped in the lower part with a check valve 55 '.
  • the upper cylinder 44 'further comprises three electrical contacts C', D ', E' arranged at different levels within said cylinder to form a water level detector. These three electrical contacts C ', D', E 'are externally connected to three electrical wires united in the electric cable CA joining the control unit CEA of the solenoid valve EA in the inspection window 3.
  • the upper cylinder 44 ' has in the upper part a lateral vent 56', protected by a non-return valve 57 ', which allows the air outlet of the upper cylinder 44', but not the water inlet or the air inlet.
  • the lower cylinder 45 'of the pneumatic pump 43' has, in its lower part, a bottom plug 59 'provided with a shock absorber 59', for example annular, forming a lower stop 64 'for the low mass 68' of the piston 46 .
  • the bottom plug 59 'further comprises a low compressed air inlet 60' coming from the compressed air circuit A passing through the solenoid valve EA controlled by the control unit CEA and placed in the inspection window 3.
  • the lower cylinder 45 ' has in the upper part a side vent 71', protected by a non-return valve 72 ', which allows the air outlet of the lower cylinder 44', but not the water inlet or the air inlet.
  • the implementation of the drainage device 1 is similar to the example described above.
  • the vents 56 'and 71' are open, and the water contained in the soil whether it is free, gravity, bonded or the like, will enter the lower part of the drain 2 through the filtering material 29 of the borehole 22 and the stranded pipe section 24 of the drain 2 (see FIG. figure 3 ).
  • the water thus contained in the drain 2 will enter the upper cylinder 44 'of the pneumatic pump 43' through the strainer 47 'and the non-return valve 48' (see figure 5 ).
  • the residual air in the upper cylinder 44 ' is discharged by the ascent of the water and is evacuated by the lateral vent 56'. As soon as the water contained in the upper cylinder 44 'passes in front of the electrical contact D', it ensures the electrical continuity between the contacts C 'and D' which opens the control circuit CEA. As soon as the water passes in front of the third electrical contact E ', the electrical continuity between the contacts D' and E 'opens the solenoid valve EA. The compressed air circuit A is then supplied and the compressed air is injected into the pneumatic pump 43 'by the low compressed air inlet 60'.
  • the piston 46 ' Under the air pressure, the piston 46 'rises, chasing the residual air by the side vent 71', and its high mass 67 'will discharge the water contained in the cylinder higher 44 '.
  • the discharged water is evacuated through the outlet orifice 51 'through the exhaust duct 54' since the non-return valve 48 'has closed under the water pressure.
  • the control circuit CEA closes, putting the solenoid valve EA stopped, closing the compressed air supply after a pre-set time delay allowing the piston 46' to perform its complete stroke to the top stop 52 '.
  • the depression generated by the drain 2 under vacuum opens the vents 56 'and 71' installing in the pneumatic pump 43 'an air vacuum equivalent to that of the drain 2.
  • the piston 46' then falls by its own weight and moves from its second position (high) to its first position (low). Its low mass 68 'is indeed determined to overcome the friction of the seals 70' allow the automatic lowering of the piston 46 'in its first position (low) defined by the lower stop 64'. In its descent stroke, the piston 46 'is damped by the or the dampers 60' provided on the lower stop 64 '. Upon the descent of the piston 46 ', the non-return valve 48' opens again for a new sequence of filling the drainage water in the upper cylinder 44 '.
  • Vacuuming drains 2 has the advantage of attracting gravity water to drain aquifer levels in which there is water to drain freely, but also to extract some of the water bound in the water. where the water to be drained is not free because it is linked to soil particles.
  • the presence of a pneumatic pump 43, 43 'in each of the drains 2 of the drainage device 1 has the advantage of being able to operate in a medium where the air pressure is lower than the atmospheric pressure, and in boreholes that can to be inclined.
  • the design of the body of the pneumatic pump 43, 43 ', in two cylinders 44, 45 and 44', 45 'superimposed of different diameters, has the advantage of increasing the efficiency of the pneumatic pump 43, 43' in term depth, thanks to the section ratio, for conventional compressors operating at maximum 7 bar.
  • the pneumatic pump 43, 43 ' also operates in drains 2 left at atmospheric pressure, i.e. without being connected to a vacuum pump 16.
EP16158051.9A 2015-03-05 2016-03-01 Drainagevorrichtung fuer tiefe böden Withdrawn EP3064649A1 (de)

Applications Claiming Priority (1)

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FR1551854A FR3033341B1 (fr) 2015-03-05 2015-03-05 Dispositif pour drainer un sol en profondeur

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Cited By (6)

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CN108755722A (zh) * 2018-08-18 2018-11-06 中铁二院昆明勘察设计研究院有限责任公司 隧道及地下结构的排水装置及排水方法
CN110777830A (zh) * 2019-08-30 2020-02-11 中电建十一局工程有限公司 一种富水厚砂砾层地质条件下基坑降水控制方法
CN112459097A (zh) * 2020-11-14 2021-03-09 熊巧云 一种用于深厚砂类土深基坑开挖水位控制装置
CN114568260A (zh) * 2022-02-28 2022-06-03 内蒙古科学技术研究院 一种黄芪栽培灌溉装置
CN115142450A (zh) * 2022-03-16 2022-10-04 中交上海航道局有限公司 一种气动降水方法及其降水装置
CN115305901A (zh) * 2022-08-16 2022-11-08 中交第四公路工程局有限公司 定向回灌兼应急抽水井

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Citations (1)

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Publication number Priority date Publication date Assignee Title
EP1182355A1 (de) 2000-08-23 2002-02-27 Groupe Ress Sàrl Einrichtung zur Tiefbodendrainage

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
EP1182355A1 (de) 2000-08-23 2002-02-27 Groupe Ress Sàrl Einrichtung zur Tiefbodendrainage

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108755722A (zh) * 2018-08-18 2018-11-06 中铁二院昆明勘察设计研究院有限责任公司 隧道及地下结构的排水装置及排水方法
CN110777830A (zh) * 2019-08-30 2020-02-11 中电建十一局工程有限公司 一种富水厚砂砾层地质条件下基坑降水控制方法
CN112459097A (zh) * 2020-11-14 2021-03-09 熊巧云 一种用于深厚砂类土深基坑开挖水位控制装置
CN112459097B (zh) * 2020-11-14 2022-06-24 湖南恒邦建工有限公司 一种用于深厚砂类土深基坑开挖水位控制装置
CN114568260A (zh) * 2022-02-28 2022-06-03 内蒙古科学技术研究院 一种黄芪栽培灌溉装置
CN115142450A (zh) * 2022-03-16 2022-10-04 中交上海航道局有限公司 一种气动降水方法及其降水装置
CN115142450B (zh) * 2022-03-16 2023-06-27 中交上海航道局有限公司 一种气动降水方法及其降水装置
CN115305901A (zh) * 2022-08-16 2022-11-08 中交第四公路工程局有限公司 定向回灌兼应急抽水井

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