EP3613944B1 - Water drainage system - Google Patents

Water drainage system Download PDF

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Publication number
EP3613944B1
EP3613944B1 EP19182486.1A EP19182486A EP3613944B1 EP 3613944 B1 EP3613944 B1 EP 3613944B1 EP 19182486 A EP19182486 A EP 19182486A EP 3613944 B1 EP3613944 B1 EP 3613944B1
Authority
EP
European Patent Office
Prior art keywords
tube
water
collar
wall
filtering
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.)
Active
Application number
EP19182486.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3613944A1 (en
Inventor
Antonio Sanella
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Clivio Srl
Original Assignee
Clivio Srl
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Filing date
Publication date
Application filed by Clivio Srl filed Critical Clivio Srl
Publication of EP3613944A1 publication Critical patent/EP3613944A1/en
Application granted granted Critical
Publication of EP3613944B1 publication Critical patent/EP3613944B1/en
Active legal-status Critical Current
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F16/00—Drainage
    • E21F16/02—Drainage of tunnels
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F16/00—Drainage

Definitions

  • the present invention relates to a subsoil water drainage system. Drainage systems are used in various sectors such as the stabilisation of an underground area subject to landslides or to increase safety during drilling, for example drilling tunnels. Such prior art system are for instance known from EP1911886A1 and EP1908884A1 .
  • one of the draining methods envisages the building of a small reinforced concrete tunnel in proximity to the area subject to landslides or the place in which a tunnel is to be built.
  • the tunnel is sufficiently wide to allow the passage of the workers.
  • drilling can be performed through corresponding drainage tubes.
  • a disposable drill bit is placed at the end of each drainage tube.
  • the tube is placed in rotation and in this way it is made to advance in the subsoil transversally to the tunnel.
  • Pressurised water is pumped to the bit in order to facilitate drilling, the removal of the drilled material and cooling.
  • the water is conveyed to the bit inside the tube, then it exits by crossing a non-return valve.
  • the filtering bodies are placed by interference inside through holes made on the wall of the tube.
  • the tube is made of metallic material and also the filtering bodies have an outer portion made of metallic material.
  • a drawback of this embodiment is that the pressurised water that is introduced into the tube during installation could overcome the interference between the filtering bodies and the tube, expelling the filtering bodies from the respective seats. This could therefore compromise both the correct installation of the drainage tube reducing the water flow rate to the disposable bit and the correct operation of the drainage pipe once installed. In fact, the absence of filtering bodies would cause the entry of debris. Or the filtering bodies, if removed from the correct position, could even obstruct the channel in an undesired way.
  • the technical task underlying the present invention is to propose a drainage system which obviates the drawbacks in the known art as described above.
  • an object of the present invention is to provide a drainage system able to improve the correct operation.
  • reference numeral 1 denotes a drainage system.
  • the drainage system 1 comprises a water drainage tube 2 for draining a liquid, typically water.
  • the tube 2 is made of metallic material.
  • the tube 2 comprises a wall 20 provided with through holes 21.
  • the wall 20 is a side wall of the tube 2 and the holes 21 cross the thickness of the wall 20.
  • the system 1 comprises a drill bit 22 placed at an end of the tube 2.
  • the drill bit 22 is preferably at least partially disposable. In fact it could be a single-use bit. Once used for drilling it is left in situ (until the end of drilling). In the solution of figure 2 the bit 22 is completely disposable. In an alternative solution the bit 22 could be at least partially removed making it transit inside the tube 2 (solution exemplified in figure 1 ).
  • the drainage system 1 comprises a group 300 of filtering bodies fitted in the corresponding holes 21.
  • the holes 21 are advantageously distributed along the length of the tube 2. They advantageously lie along the same straight line.
  • the holes 21 are facing along different dimensions. For example they may be distributed according to a helical trend. For example a part of the holes 21 face upwards, or downwards, others are afforded on the lateral sides.
  • the drainage system 1 is self-drilling. This means that the tube 2 responsible for drainage and comprising the bit 22 performs the drilling itself.
  • the tube 2 advantageously extends along an inclined straight line.
  • the bit 22 is higher. This facilitates the outflow of water.
  • the filtering bodies of said group 300 comprise at least a first filtering body 3 fitted in one of said holes 21.
  • the first filtering body 3 assumes a first configuration in which it comprises water-soluble waterproofing means 31 which prevents passage of water.
  • the first filtering body 3 assumes a second configuration wherein the water-soluble waterproofing means 31 is absent, enabling the water to pass through the thickness of a wall 20 of the tube 2. In fact, in the second configuration the water-soluble means 31 has been dissolved. This is because of the contact with the water pumped through the tube 2 during drilling or however with the subsequent contact with the water present in the subsoil and that the tube 2 proposes to drain.
  • Such water-soluble means 31 is/comprises for example a water-soluble glue (an example of the water-soluble means 31 could be the material known by the trade name of Hydrolene). It internally obstructs a passage section of the first body 3. One or more of the characteristics described with reference to the first filtering body 3 can be repeated for all the other filtering bodies of said group 300 of filtering bodies.
  • the first filtering body 3 of said group 300 comprises snap-fitting means 30 to the wall 20 of the tube 2.
  • the snap-fitting means 30 comprises flexible anchoring fins 301 to an internal surface 201 of the tube 2. Such fins 301 define flexible hooks.
  • the fins 301 are elastically deformable.
  • the first filtering body 3 of said group 300 comprises at least three fins 301 arranged along a circumference.
  • the first filtering body 3 of said group comprises at least six fins 301 arranged along a circumference.
  • the fins 301 are first deformed by moving towards each other and then they tend to return to the initial position moving away from each other.
  • the fins 301 are therefore first compressed towards the centre of the circumference and then they move away from said centre.
  • Each of said flexible anchoring fins 301 comprises a first and a second wall 304, 305 facing along opposite directions.
  • the first wall 304 defines a guide for insertion of the first filtering body 3 into the tube 2, in particular in one of the holes 21.
  • the second wall 305 opposes the extraction of the first filtering body 3 from the tube 2.
  • At least the first filtering body 3 of said group comprises a perimeter collar 302 and a grid 303 placed inside the collar 302.
  • the grid 303 performs a filtering action in the second configuration. In fact, it allows any debris to be kept outside preventing entry into the tube 2 letting the water to be drained pass through. In the first configuration the grid 303 is buried inside the waterproofing means 31.
  • the collar 302 and the grid 303 are in a single monolithic body.
  • the collar 302 and possibly also the grid are 303 made of plastic material.
  • the fins 301 could be made of plastic material.
  • the fins 301 are made of metallic material.
  • the fins 301 are made of steel.
  • the collar 302 is made of metallic material (preferably steel).
  • the grid 303 is made of metallic material, in particular steel.
  • the fins 301 are made in a single body with the collar 302 and are positioned at an end of the collar 302 that is located inside the tube 2.
  • the collar 302 is connected by interference in one of said corresponding holes 21.
  • At least one of said holes 21 is defined by a lateral surface that narrows a passage section proceeding from the inside of the tube 2 towards the outside of the tube 2 (moving along the thickness of the tube 2).
  • the lateral surface is a truncated cone shape. In this way it offers greater resistance to the movement of the filtering bodies 300 inside the tube 2.
  • the tube 2 comprises a plurality of chunks connected together. For example they can be screwed to each other.
  • the collar 302 externally comprises one or more reliefs 306 which increase the anchorage to the tube 2 (in particular the anchorage to the holes 21).
  • said one or more reliefs extend along an arc, particularly circumferentially (see figure 6 ).
  • the system 1 comprises a seal 307 interposed between the collar 302 and the tube 2 (see figure 7 ).
  • the tube 2 provided with the bit 22 at one end is inserted into the ground to be dug generating a drilling action.
  • pressurised water is conveyed through the tube 2 to the bit 22 and then dispensed externally.
  • Such water flowing between the tube 2 and the drilled hole facilitates the removal of drilling debris. It also facilitates the dissolution of the water-soluble waterproofing means 31 so as to allow the passage through said group 300 of filtering bodies of the water to be drained.
  • the tube 2 provided with the bit 22 has a further conduit 23 inside it.
  • Such conduit 23 and possibly at least a part of the bit 22 can be removed once drilling has finished.
  • the water pumped to the bit 22 returns upstream passing into a gap interposed between the conduit 23 and the tube 2.
  • the present invention achieves important advantages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Cyclones (AREA)
EP19182486.1A 2018-07-30 2019-06-26 Water drainage system Active EP3613944B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000007633A IT201800007633A1 (it) 2018-07-30 2018-07-30 Sistema di drenaggio acqua

Publications (2)

Publication Number Publication Date
EP3613944A1 EP3613944A1 (en) 2020-02-26
EP3613944B1 true EP3613944B1 (en) 2020-11-25

Family

ID=64049531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19182486.1A Active EP3613944B1 (en) 2018-07-30 2019-06-26 Water drainage system

Country Status (3)

Country Link
EP (1) EP3613944B1 (it)
ES (1) ES2855729T3 (it)
IT (1) IT201800007633A1 (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113236359B (zh) * 2021-05-28 2022-06-28 中煤科工集团西安研究院有限公司 一种离层水的疏放方法、离层水疏放巷道***及施工方法
CN113530599B (zh) * 2021-07-21 2022-08-23 重庆交通大学 一种基于物联网的隧道排水管结晶处理装置
CN113445959B (zh) * 2021-08-10 2022-02-01 中铁二院工程集团有限责任公司 岩溶或断层隧道的钻孔排水结构及其施工方法和施工结构

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPC20060043A1 (it) * 2006-10-02 2008-04-03 Cesare Melegari Metodo per la realizzazione di opere di drenaggio , in particolare per la stabilizzazione, di versanti e/o terreni instabili o franosi
ITPC20060044A1 (it) * 2006-10-02 2008-04-03 Cesare Melegari Tubo di drenaggio migliorato

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2855729T3 (es) 2021-09-24
EP3613944A1 (en) 2020-02-26
IT201800007633A1 (it) 2020-01-30

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