EP0233312B1 - Drain material holding apparatus for board drain process - Google Patents

Drain material holding apparatus for board drain process Download PDF

Info

Publication number
EP0233312B1
EP0233312B1 EP19860111910 EP86111910A EP0233312B1 EP 0233312 B1 EP0233312 B1 EP 0233312B1 EP 19860111910 EP19860111910 EP 19860111910 EP 86111910 A EP86111910 A EP 86111910A EP 0233312 B1 EP0233312 B1 EP 0233312B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
drain material
drain
ground
cover
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.)
Expired
Application number
EP19860111910
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0233312A3 (en
EP0233312A2 (en
Inventor
Masanori C/O Toyo Construction Co. Ltd. Mitsuse
Hideo C/O Toyo Construction Co. Ltd. Yokozawa
Kaoru C/O Toyo Construction Co. Ltd. Sarasawa
Seiichi C/O Toyo Construction Co. Ltd. Goto
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.)
Toray Engineering Co Ltd
Original Assignee
Toyo Construction Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyo Construction Co Ltd filed Critical Toyo Construction Co Ltd
Publication of EP0233312A2 publication Critical patent/EP0233312A2/en
Publication of EP0233312A3 publication Critical patent/EP0233312A3/en
Application granted granted Critical
Publication of EP0233312B1 publication Critical patent/EP0233312B1/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
    • E02D3/103—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains by installing wick drains or sand bags

Definitions

  • the present invention relates to a drain material inserting apparatus according the precharacterizing part of claim 1.
  • the drain board method of draining includes the steps of: inserting a drain material composed of paper fibers (paper drain material), or a drain material composed of high molecular compound such as polyvinyl chloride, polypropylene, into a hollow madrel; driving the drain material into the ground together with the mandrel; pulling only the mandrel out of the ground; and draining interstitial water contained in the ground through the drain material left in the ground so as to strengthen the ground.
  • a drain board method as described above there occur serious problems how to drive the drain material into the ground together with the mandrel and now to separate the drain material from the mandrel so as to leave the drain material in the ground, and therefore in order to solve the problems, various trials have been effected.
  • Figs. 4(a) through 4(c) show specific examples of prior art trials.
  • folding shoe member 4 is attached on the lower end portion of a drain material 3 in the vicinity of a drain material insertion through hole 2 formed in the lower end of a mandrel 1 to thereby leave the drain material 3 within the ground by utilizing resistance of the shoe member 4 after the drain material 3 has been driven into the ground together with the mandrel 1.
  • an inverted T-shaped shoe member 5 is attached on the lower end of a drain material 3 to thereby leave the drain material 3 within the ground by utilizing resistance of the shoe member 5 similarly to the foregoing case.
  • a drain material 3 is partially bent along the outer peripheral surface of a mandrel 1 into a U-shaped form so that the drain material 3 can be driven into and left within the ground by resistance of the drain material itself.
  • earth and sand can enter into the mandrel 1 through the drain material insertion through hole 2, and it is troublesome to remove the earth and sand.
  • the cover part is a shoe, which is rotatably attached at the downward end of the mandrel and which opens outwardly under its own weight.
  • This cover shoe is closed, when it touches the ground, at the beginning of each operation, when the mandrel or casing is lowered down to the ground.
  • the cover shoe opens by swinging to the side under its own weight. At this moment the drain material is not fixed by the pushing rod to the ground of the hole.
  • the object of the present invention is therefore to solve these problems in the prior art.
  • the solution according to the invention consists in - in connection with the apparatus of the pre-characterizing clause - that the cover-part consists -of a cover plate, disposed below a bottom plate of the mandrel, and two supporting plates extending along the outer peripheral surface of the mandrel, one from each of the two opposite sides of the cover plate, and that the two supporting plates are connected to a horizontal shaft rotatably mounted in the mandrel, so that the cover plate is rotated by the shaft to open and close the drain material insertion thorugh hole and grasp the drain material between its forward end and the pushing rod.
  • the fulcrum shaft is connected through a pair of crank arms to the piston rod of a cylinder suspended in mandrel.
  • the cover plate Wheb the mandrel has reached ist deepest position in the ground, the cover plate is swung laterally to the side by turning the shaft. So the cover plate rotates away, whereas the mandrel and the push rod are still in the deepest position, so in the deepest position the push rod fixes the drain material positively to the ground and holds it against the ground, when the mandrel is withdrawn.
  • a drain material can be surely driven into the ground.
  • the pushing rod is moved relative to the mandrel to thereby make it possible to push the drain material into the ground so as not to cause the drain material to move upward together with the mandrel, and therefore there is such an effect that the drain material can be surely left within the ground.
  • Fig. 1 as a sectional view showing the man structure of the drain material inserting apparatus for carrying out a drain board method, according to the present invention:
  • a hollow mandrel 11 has a flatly formed lower end portion, and a bottom plate 13 is connected to mandrel 11 at the lower end thereof.
  • the bottom plate 13 formed therein with a drain material insertion through hole 12 at a position offset from the center thereof.
  • a bush 14 rectangular in cross section is vertically fixedly attached to the bottom plate 13 so as to occupy one side portion of the drain material insertion through hole 12, one end portion of a plate-like pushing rod 15 being slidably fitted in the bush 14.
  • the pushing rod 15 is supported at its upper end portion by driving means (not shown) so as to be movable relative to the mandrel 11 and normally positioned so as to make the lower end thereof substantially coincide with the lower end of the mandrel 11.
  • the openable/closable cover 16 is constituted by a cover plate 17 disposed below the bottom plate 13 of the mandrel 11, a supporting plate 18 extending along the outer peripheral surface of the mandrel 11 from the opposite sides of the cover plate 17, and a shaft 19 rotatably horizontally suspended by the mandrel 11 for connecting the supporting plate 18 with the mandrel 11, so that the cover plate 17 is rotated with the shaft 19 so as to open/close the drain material insertion through hole 12, and so as to grasp a drain material 20 between the forward end portion of the cover plate 17 and the pushing rod 15 in the state where the drain material insertion through hole 12 is closed by the cover plate 17.
  • connection arms 21 The shaft 19 is connected through a pair of connection arms 21 to a cylinder 22 suspended in the mandrel 11.
  • Each of the connection arms 21 has one end fixedly attached to the shaft 19 by a key 23 and the other end rotatably attached to a piston rod 24 of the cylinder 22 by a pin 25.
  • the connection arms 21 are rotated clockwise to rotate the openable/closable cover 16 clockwise to thereby cause the cover plate 17 to open the drain material insertion through hole 12.
  • the mandrel 11 is mounted on a driving machine (not shown), and a feeding apparatus (not shown) is actuated to insert the drain material 20 into the mandrel 11.
  • a feeding apparatus not shown
  • the cylinder 22 is actuated to rotate the openable/closable cover 16 in the direction to open the drain material insertion through hole 12, and the lower end of the pushing rod 15 is positioned so as to coincide with the lower end of the mandrel 11, one end of the drain material 20 being slightly projected from the lower end of the mandrel 11.
  • the cylinder 22 is operated to rotate the openable/closable cover 16 in the direction to close the drain material insertion through hole 12.
  • the drain material insertion through hole 12 is closed by the openable/closable cover 16 so that the drain material 20 is firmly grasped between the cover body 17 and the pushing rod 15 to be horizontally bent at its one end portion.
  • the cylinder 22 is operated again to rotate the openable/closable cover 16 in the direction to open the drain material insertion through hole 12 as shown in Fig.3(c), and then only the mandrel 11 is moved up.
  • the pushing rod 15 is moved down relative to the mandrel 11 as shown in Fig.3(d).
  • the drain material 20 is never moved up together with the mandrel 11 because the forward end portion of the drain material 20 is pushed into the ground. Thereafter, if the pushing rod 15 is pulled out of the ground, the drain material 20 is surely left in the ground.
  • the present invention is not limited to this embodiment, for example, the pushing rod 15 may be moved down with the mandrel 11 held in the fixed state, or the pushing rod 15 may be moved down simultaneously with the moving up of the the mandrel 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
EP19860111910 1986-02-17 1986-08-28 Drain material holding apparatus for board drain process Expired EP0233312B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1986021391U JPH0621946Y2 (ja) 1986-02-17 1986-02-17 ボ−ド・ドレ−ン工法用ドレ−ン材保持装置
JP21391/86 1986-02-17

Publications (3)

Publication Number Publication Date
EP0233312A2 EP0233312A2 (en) 1987-08-26
EP0233312A3 EP0233312A3 (en) 1987-10-07
EP0233312B1 true EP0233312B1 (en) 1990-07-18

Family

ID=12053764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860111910 Expired EP0233312B1 (en) 1986-02-17 1986-08-28 Drain material holding apparatus for board drain process

Country Status (2)

Country Link
EP (1) EP0233312B1 (ja)
JP (1) JPH0621946Y2 (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG67394A1 (en) * 1997-06-05 1999-09-21 Raswill Representative Pte Ltd A mandrel shoe
US6971875B2 (en) * 1999-09-24 2005-12-06 Cao Group, Inc. Dental curing light
NL1019619C2 (nl) * 2001-12-20 2002-12-20 Ndb B V Inrichting voor het plaatsen van bijvoorbeeld drainagelinten.
US7736091B2 (en) 2006-09-28 2010-06-15 Freyssinet Method and device for inserting a drainage wick
US7566188B2 (en) 2006-09-28 2009-07-28 Freyssinet Method and device for inserting a drainage wick
NL1033150C1 (nl) * 2006-12-29 2008-07-01 Bos & Kalis Baggermaatsch Inrichting voor het in een bodem inbrengen van een drainage-element.
KR101034981B1 (ko) 2009-03-13 2011-05-17 주식회사 한영기계 드레인재 삽입장치
NL2016988B1 (en) * 2016-06-17 2018-01-16 Boskalis Bv Baggermaatschappij Arrangement for introducing an elongate, flexible element into a subsoil
CN116876465A (zh) * 2023-09-07 2023-10-13 华能澜沧江水电股份有限公司 一体式排水管、排水系统及排水系统的施工方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5110408B2 (ja) * 1972-01-27 1976-04-03
JPS5829372B2 (ja) * 1978-05-30 1983-06-22 辰雄 森本 軟弱地盤の改良に使用するドレ−ン・ボ−ドの製法
JPS59195915A (ja) * 1983-04-19 1984-11-07 Shinko Tsusho Kk ペ−パ−ドレ−ン材打設用ケ−シングとその使用方法

Also Published As

Publication number Publication date
JPS62133728U (ja) 1987-08-22
EP0233312A3 (en) 1987-10-07
JPH0621946Y2 (ja) 1994-06-08
EP0233312A2 (en) 1987-08-26

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