EP0451926A1 - Methode zur Einlegung eines im wesentlichen vertikalen Schirmes in den Grund - Google Patents

Methode zur Einlegung eines im wesentlichen vertikalen Schirmes in den Grund Download PDF

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Publication number
EP0451926A1
EP0451926A1 EP91200886A EP91200886A EP0451926A1 EP 0451926 A1 EP0451926 A1 EP 0451926A1 EP 91200886 A EP91200886 A EP 91200886A EP 91200886 A EP91200886 A EP 91200886A EP 0451926 A1 EP0451926 A1 EP 0451926A1
Authority
EP
European Patent Office
Prior art keywords
panel
sheet
sheeting
insertion sheet
trench
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.)
Granted
Application number
EP91200886A
Other languages
English (en)
French (fr)
Other versions
EP0451926B1 (de
Inventor
Arie Willem Van Den Berg
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.)
Hollandsche Beton Groep NV
Original Assignee
Hollandsche Beton Groep NV
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 Hollandsche Beton Groep NV filed Critical Hollandsche Beton Groep NV
Publication of EP0451926A1 publication Critical patent/EP0451926A1/de
Application granted granted Critical
Publication of EP0451926B1 publication Critical patent/EP0451926B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E02D19/00—Keeping dry foundation sites or other areas in the ground
    • E02D19/06—Restraining of underground water
    • E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
    • E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material

Definitions

  • the invention relates to a method for inserting an essentially vertical screen in the ground, comprising:
  • Such a method is described in DE-A-3540270 and is used for the isolation of polluted ground and groundwater and for well drainage.
  • the flexible sheeting panels are, for example, 2 - 3 metres wide.
  • the insertion of the panels by means of an insertion sheet takes place in such a way that the locks are placed under little or no load.
  • the bentonite sheeting screen must be connected to a watertight layer, for example of a natural clay or an injected synthetic layer.
  • the screens can be of a great height, for example approximately 30 metres. Problems then occur with unrolling each panel into the vertical position from the rolled-up state and connecting one edge of the panel to the top edge of the insertion sheet.
  • each sheeting panel is fixed at the top edge of the insertion sheet to said sheet and the sheeting panel is taken into a vertically downward hanging position by pulling said sheet up out of the trench and in that, before the combination of sheet and sheeting panel connected to it is lowered in the trench, this combination is moved over approximately the width of a sheeting panel in the lengthwise direction of the trench.
  • the function of the insertion sheet is not only to press a panel into the ground, but also to unroll the panel from the rolled-up state into a vertical position, after which it is ready for pressing into the ground trench.
  • the method according to the invention is of great advantage.
  • clips can be fixed a certain vertical distance apart on the sheet, which clips fall round the sheeting panel and protect it from the wind, and which are removed one by one when the panel is being placed in the ground.
  • a clamping bar fixed to the sheet can be used in order to fix a top edge of each panel to the insertion sheet.
  • Each sheeting panel can be pulled taut by a device being fitted between the clamping bar and the top side of the insertion sheet, by means of which a limited almost vertical displacement of the clamping bar is possible.
  • This device can be, for example, a cable which is fixed on the clamping bar and runs over a pulley provided on the top edge of the insertion sheet to the rear side of the insertion sheet, where it is tensioned on the sheet. It is also possible for the above-mentioned device to comprise known mechanical, hydraulic or pneumatic means for making the clamping bar undergo a slight vertical displacement.
  • clamping bar it is further possible for the clamping bar to be guided additionally in the vertical direction through the fact that the clamping bar with guide pins projecting through slotted holes into the clamping bar and fixed on the insertion sheet can move freely over a certain vertical distance if the tensioning device is out of action.
  • Other designs are also possible for tensioning the sheeting panel.
  • the invention also relates to an insertion sheet intended for placing sheeting panels in the ground according to the invention, in which a clamping bar is fixed near the top edge of said sheet.
  • a clamping bar is fixed near the top edge of said sheet.
  • the fixing of the clamping bar can be such that a limited displacement of the clamping bar towards and away from the top edge of the sheet is possible.
  • the invention relates to a wind clip for connecting a sheeting panel to an insertion sheet during carrying out of the above-mentioned method, in which the clip has two flanges lying opposite each other which are intended for insertion through openings in transverse members of the insertion sheet, and in which at least one of the side parts of the clip is made slidable or hinged, and securing means are present for the purpose of securing said slidable or hinged side part.
  • Figure 1 shows a vertical section through a sheeting panel fitted in a ground trench, with anchor and insertion sheet projecting into it.
  • Figure 2 shows a vertical section of said ground trench during unrolling of the next sheeting panel.
  • Figure 3 shows a vertical section of the sheeting panel hanging from the top edge of the sheet above ground level and above the trench.
  • Figure 4 shows a top view of a ground trench with sheeting panels to be placed in the ground according to the invention.
  • Figure 5 shows a detail of the insertion sheet with clamping bar on a larger scale.
  • Figure 6 shows a cross-section of a screen with insertion sheet at the position of a wind clip.
  • FIGs 1 to 4 illustrate the way in which the sheeting panels of a vertical ground screen are inserted in succession in a ground trench 1 filled with a bentonite-containing mixture.
  • a sheeting panel 3 is indicated by 3a in Figure 1
  • the next sheeting panel is indicated by 3b in Figures 2 and 3.
  • Each of the panels has on the two vertical side edges a locking part, in which case a locking part 2a on a side edge of a panel can be connected, for example in the manner described in Dutch Patent Applications 8301918 or 8901423, to a locking part 2b on the other side edge of the next panel.
  • the panels have at their bottom edge a thickened part 4 projecting into a steel anchor 5.
  • the sheet 6 is first moved in the lengthwise direction of the trench over about the width of a panel, and only then is the panel 3b pushed into the ground trench by the sheet 6, it being ensured that the locking parts facing each other on the panels 3a and 3b engage with each other.
  • the clips 9 are also removed in succession at ground level.
  • the panel 3b assumes the position which is shown with regard to panel 3a in Figure 1, and the placing in the ground of the next panel in accordance with the cycle described above can begin. It will be clear that the wall formed from the panels can be of any desired length.
  • the clamping bar 8 can be fixed in such a way to the insertion sheet 6 that the latter can undergo a limited vertical displacement, and a tensioning cable 10 can be fixed to the clamping bar 8, which cable is guided over a pulley 11 fitted on the insertion sheet 6 to a mechanical, hydraulic or pneumatic cable tensioning device of known design (not shown). Tensioning the cable 10 pulls the panel taut.
  • Another possibility for pulling the panel 3 taut is to connect the clamping bar 8 directly to the top side of the insertion sheet by means of other mechanical and/or hydraulic or pneumatic devices which can impose limited virtually vertical movements on the clamping bar 8.
  • the clamping bar 8 has two clamping jaws 8a, 8b between which the top edge of a panel 3 can be clamped.
  • the clamping jaws 8a, 8b can be operated by mechanical, hydraulic or pneumatic devices.
  • two or more pins 13 projecting through the vertical slotted holes 14 into the clamping bar are welded to the sheet. Heads 15 welded to the pins 13 prevent the pins from coming out of the slotted holes.
  • FIG. 6 An embodiment of the insertion sheet 6 with a wind clip 9 is shown in Figure 6.
  • the U-shaped clip has two flanges 16a, 16b which lie opposite each other and project through openings in transverse plates 17a, 17b of the insertion sheet 6.
  • parts 17a, 17b, 17c and 17d are components of the reinforcement structure 17 of insertion sheet 6.
  • the sheet 6 has semi-cylindrical vertical rods 18a, 18b which are fitted on it and can engage on a panel 3 and clamp it against spacers 19a, 19b welded on the wind clip 9 concerned.
  • One of the side parts of the clip 9 is hinged by means of a rotary pin 20 and can be secured in the position shown by means of a removable securing pin 21.
  • a rotary pin 20 When the securing pin is removed the end part can be turned away to the position shown by dotted and dashed lines in Figure 6, and the side part of the clip can be pivoted into a position in which the flange 16b projects through an opening of the transverse plate 17b.
  • a sheeting panel 3 can be taken by the insertion sheet 6 into a vertical position above ground level and that sheeting panel 3 can subsequently be pulled taut, following which insertion sheet 6 places this sheeting panel next to the previous panel 3 after being slid along over a panel width in the lengthwise direction of the trench.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Piles And Underground Anchors (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
EP19910200886 1990-04-12 1991-04-12 Methode zur Einlegung eines im wesentlichen vertikalen Schirmes in den Grund Expired - Lifetime EP0451926B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9000874A NL9000874A (nl) 1990-04-12 1990-04-12 Werkwijze voor het in de grond brengen van een in hoofdzaak verticaal scherm.
NL9000874 1990-04-12

Publications (2)

Publication Number Publication Date
EP0451926A1 true EP0451926A1 (de) 1991-10-16
EP0451926B1 EP0451926B1 (de) 1993-04-21

Family

ID=19856922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910200886 Expired - Lifetime EP0451926B1 (de) 1990-04-12 1991-04-12 Methode zur Einlegung eines im wesentlichen vertikalen Schirmes in den Grund

Country Status (3)

Country Link
EP (1) EP0451926B1 (de)
DE (1) DE69100065T2 (de)
NL (1) NL9000874A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105507338A (zh) * 2015-12-24 2016-04-20 李金良 一种排桩插接桩板组合式支护堵水连续墙成型工法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10354799B4 (de) * 2003-11-21 2007-04-19 Wirz, Christian H. Anordnung für eine Deichabdichtung und eine Deicherhöhung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE627142A (de) *
DE3540270A1 (de) * 1985-11-13 1987-05-14 Wayss & Freytag Ag Verfahren zur herstellung einer dichtwand und vorrichtung zur durchfuehrung des verfahrens

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE627142A (de) *
DE3540270A1 (de) * 1985-11-13 1987-05-14 Wayss & Freytag Ag Verfahren zur herstellung einer dichtwand und vorrichtung zur durchfuehrung des verfahrens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105507338A (zh) * 2015-12-24 2016-04-20 李金良 一种排桩插接桩板组合式支护堵水连续墙成型工法
CN105507338B (zh) * 2015-12-24 2018-06-05 李金良 一种排桩插接桩板组合式支护堵水连续墙成型工法

Also Published As

Publication number Publication date
NL9000874A (nl) 1991-11-01
EP0451926B1 (de) 1993-04-21
DE69100065T2 (de) 1993-11-04
DE69100065D1 (de) 1993-05-27

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