EP0665917B1 - Creation d'un polder au moyen de parois ecrans et procede correspondant - Google Patents

Creation d'un polder au moyen de parois ecrans et procede correspondant Download PDF

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Publication number
EP0665917B1
EP0665917B1 EP93924219A EP93924219A EP0665917B1 EP 0665917 B1 EP0665917 B1 EP 0665917B1 EP 93924219 A EP93924219 A EP 93924219A EP 93924219 A EP93924219 A EP 93924219A EP 0665917 B1 EP0665917 B1 EP 0665917B1
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EP
European Patent Office
Prior art keywords
shielding walls
polder
another
located opposite
construction according
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 - Lifetime
Application number
EP93924219A
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German (de)
English (en)
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EP0665917A1 (fr
Inventor
Gerrit Oudakker
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.)
VAN SPLUNDER FUNDERINGSTECHNIEK BV
Original Assignee
VAN SPLUNDER FUNDERINGSTECHNIEK BV
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Publication of EP0665917A1 publication Critical patent/EP0665917A1/fr
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/02—Sheet piles or sheet pile bulkheads

Definitions

  • the invention relates to a polder construction comprising upright shielding walls which are located in the ground relatively wide apart at ground level and which are connected to one another at their lower ends in an essentially water-impermeable manner.
  • the invention also relates to a method for implementing said polder construction.
  • Such a construction is known from NL-A-7.807.351.
  • a semi-circular shielding wall is inserted into the ground to form a water-tight enclosure which is subsequently excavated.
  • the known shielding wall will be difficult to handle upon insertion into the ground and is cumbersome during transportation.
  • the known semi-circular wall will experience a relatively large' upwardly directed force from the ground water, such that additional ballasting measures must be taken to obtain a static equilibrium situation.
  • the water-tight layer can be a naturally occurring barrier layer composed of, for example, clay.
  • Said watertight layer can also be a concrete floor or a watertight sand layer obtained by injection of, for example, water-glass or other injectable materials.
  • the advantage in using a naturally occurring barrier layer is that a watertight polder construction is obtained immediately on inserting the dam wall into the ground, as a result of which excavation work can be carried out inside the polder construction without problems due to the ingress of groundwater from the surrounding area and the associated need for (temporary) well drainage with the associated adverse lowering of the groundwater level. If it is to offer adequate resistance to the groundwater pressure, a polder construction which has a naturally occurring watertight floor can usually be only partially excavated.
  • said natural barrier layer is absent, it is necessary, after inserting the dam wall, to dig out the earth inside down to the level where the watertight floor has to be installed. This excavation work is usually carried out in the wet, because groundwater from the surrounding area continues to flow in freely via the underside. Lowering of the surrounding groundwater level can be used to restrict said flow. After the watertight floor has been installed, for example by pouring underwater concrete, the polder created can be emptied by pumping out. If the watertight floor is insufficiently heavy, ballast must be placed on top and/or tension posts or anchors connected to the floor are needed to offer adequate resistance to the upwards pressure of the groundwater.
  • the aim of the invention is to provide an alternative polder construction and method for the implementation thereof, which in the case of the absence of a naturally occurring watertight floor is more effective than the known polder constructions which may use watertight walls and floors and described above, and which can be relatively easily constructed.
  • the shielding walls inserted in the ground opposite one another delimit a funnel-shaped region narrowed towards the lower ends of the shielding walls.
  • the shielding walls are inserted into the ground sloping towards one another, as a result of which the gap between them at the bottom becomes appreciably smaller than that at ground surface level.
  • the angle of slope of the shielding walls is more than 10° with respect to the vertical. Consequently, underground a watertight seal between the shielding walls located opposite one another has to be provided only in a relatively small region, whilst retaining a large floor surface area for the area below ground.
  • the conventional polder construction having a watertight floor produced in the wet as a consequence of the small gap between the shielding walls less trouble from welding-up groundwater is experienced when excavation is carried out down to the bottom of the shielding walls.
  • Anchoring of the watertight floor is also more secure, since said floor presses from below against the sloping shielding walls, which because of their inclined position are better able to absorb the upwards forces exerted by the watertight floor.
  • the invention also offers the possibility of transmitting foundation forces via the sloping shielding walls.
  • separate anchors or other foundation means are used for this purpose.
  • the shielding walls located opposite one another are relatively close together at the bottom, a relatively rigid construction between said shielding walls is formed at this location.
  • the risk of deformation of the polder construction is reduced and more passive ground pressure action can be mobilised.
  • the enclosed area can be excavated to greater depth as a result.
  • the shielding walls positioned in a funnel-like manner exert a more reliable ground-retaining and ground-stabilising action.
  • the invention is, for example, applicable if the quality of said naturally occurring watertight floor is reliable only within a small region. If there is a naturally occurring watertight layer but this is at too great a depth it is nevertheless possible, using the invention, to create an inexpensive polder construction which does not have to extend as far as said naturally occurring watertight layer.
  • Suitable shielding walls are all conventional bend-resistant shielding walls, such as steel dam wall plates, or soft shielding walls, such as sheeting screens. The length thereof is usually several tens of metres. Said wells are vibrated, pressed or driven directly into the ground or inserted in a narrow trench filled with bentonite or the like.
  • Fig. 1 shows a trench 1 which has been made in the ground 2 and on the bottom of which two rail tracks 3 have been laid for the purposes of rail traffic 4.
  • the tracks 3 are below the groundwater table 5.
  • the trench is covered by a roof, shown as a conceptual roof 6, over which earth removed during excavation of the trench is tipped in a layer shown as a conceptual layer 7.
  • Support pillars 8 are also shown conceptually.
  • Fig. 2 shows an embodiment using flexible sealing shielding walls.
  • the trench 1 is excavated in such a way that a bank 12 remains on either side. This technique can, of course, also be used for more bend-resistant shielding walls.
  • dam wall plates are introduced into the ground opposite one another in such a way that they are relatively wide part at the top and relatively close together at the bottom.

Claims (12)

  1. Construction de polder comprenant des parois de protection dirigées vers le haut (9) qui sont disposées dans le sol en étant relativement espacées entre elles au niveau du sol, et qui sont raccordées entre elles à leurs extrémités inférieures d'une façon essentiellement imperméable à l'eau, caractérisée en ce que les parois de protection (9) disposées en regard l'une de l'autre délimitent une région en forme d'entonnoir se rétrécissant en direction des extrémités inférieures des parois de protection (9).
  2. Construction de polder selon la revendication 1, caractérisée en ce que les parois de protection (9) disposées en regard l'une de l'autre laissent à leurs extrémités inférieures un espace qui est petit par rapport à l'espace au niveau du sol.
  3. Construction de polder selon la revendication 1 ou 2, caractérisée en ce que les parois de protection (9) disposées en regard l'une de l'autre se touchent essentiellement mutuellement à leurs extrémités inférieures.
  4. Construction de polder selon l'une des revendications précédentes, caractérisée en ce que les parois de protection (9) disposées en regard l'une de l'autre enferment une région essentiellement en forme de V.
  5. Construction de polder selon l'une des revendications précédentes, caractérisée en ce qu'un matériau formant une couche ou bouchon imperméable à l'eau (10), tel que du verre soluble, est introduit entre les parois de protection disposées en regard l'une de l'autre à leurs extrémités inférieures.
  6. Construction de polder selon l'une des revendications précédentes, caractérisée en ce qu'une section de paroi s'étend toujours au-delà de la section de paroi associée disposée en regard.
  7. Construction de polder selon l'une des revendications précédentes, caractérisée en ce qu'une région ayant une surface de triangle tronqué inversé est creusée à l'intérieur de la région en forme d'entonnoir, en résultat de quoi des talus sont présents le long des parois de protection.
  8. Construction de polder selon l'une des revendications précédentes, caractérisée en ce que, au niveau du sol, l'espace entre les parois de protection (9) disposées en regard l'une de l'autre est d'au moins 5 mètres, et en ce que, au niveau des extrémités inférieures des parois de protection (9), l'espace est d'au plus 3 mètres, et, plus particulièrement, de 1 mètre.
  9. Construction de polder selon l'une des revendications précédentes, caractérisée en ce que les parois de protection (9) disposées en regard l'une de l'autre incluent un angle d'environ 20° à 130°, et, de préférence, de 60° à 100°.
  10. Procédé pour créer une construction de polder selon l'une des revendications précédentes, dans lequel des parois de protection (9) sont insérées dans le sol en regard l'une de l'autre et relativement écartées l'une de l'autre au niveau du sol, caractérisé en ce que les parois de protection sont insérées dans le sol en pente l'une vers l'autre leurs extrémités inférieures.
  11. Procédé selon la revendication 10, caractérisé en ce que l'insertion des parois de protection (9) se poursuit jusqu'à ce que les parois de protection respectives se touchent virtuellement entre elles à leurs extrémités inférieures.
  12. Procédé selon la revendication 10 ou 11, caractérisé en ce qu'après l'insertion, un matériau formant un joint imperméable à l'eau (10) est introduit à l'extrémité inférieure des parois de protection dans l'espace formé entre elles.
EP93924219A 1992-10-16 1993-10-15 Creation d'un polder au moyen de parois ecrans et procede correspondant Expired - Lifetime EP0665917B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL9201804 1992-10-16
NL9201804A NL9201804A (nl) 1992-10-16 1992-10-16 Polderprincipe onder gebruikmaking van schermwanden, alsmede werkwijze voor het maken van die polder.
PCT/NL1993/000206 WO1994009214A1 (fr) 1992-10-16 1993-10-15 Creation d'un polder au moyen de parois ecrans et procede correspondant

Publications (2)

Publication Number Publication Date
EP0665917A1 EP0665917A1 (fr) 1995-08-09
EP0665917B1 true EP0665917B1 (fr) 1998-02-04

Family

ID=19861389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93924219A Expired - Lifetime EP0665917B1 (fr) 1992-10-16 1993-10-15 Creation d'un polder au moyen de parois ecrans et procede correspondant

Country Status (5)

Country Link
EP (1) EP0665917B1 (fr)
AU (1) AU5378194A (fr)
DE (1) DE69316908T2 (fr)
NL (1) NL9201804A (fr)
WO (1) WO1994009214A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006051167A1 (fr) * 2004-11-09 2006-05-18 Valtion Teknillinen Tutkimuskeskus Procédé d’atténuation des vibrations se propageant dans le sol et barrière d’atténuation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1005713C2 (nl) * 1996-04-04 1997-11-28 Hattum & Blankevoort Bv Versnelde methode voor spoorwegverdieping.
NL1040236C2 (nl) * 2013-06-03 2014-12-08 Haner Infra Innovatie B V Tunnelopstelling.
CN109024670B (zh) * 2018-06-25 2021-04-06 中国建筑第八工程局有限公司 埋地高压电缆上穿地下综合管廊保护加固体系及加固方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1056299A (fr) * 1951-02-15 1954-02-25 Procédé pour le calfatage des bâtiments contre les infiltrations d'eaux souterraines et pour la rétention des eaux souterraines dans des fosses en maçonnerie ainsi que pour la protection contre les vibrations
NL7807351A (nl) * 1978-07-07 1980-01-09 Foundacon B V Ondergronds scherm voor het vormen van een sleuf; als- mede werkwijze voor het aanbrengen van een ondergronds scherm voor het vormen van een sleuf.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006051167A1 (fr) * 2004-11-09 2006-05-18 Valtion Teknillinen Tutkimuskeskus Procédé d’atténuation des vibrations se propageant dans le sol et barrière d’atténuation

Also Published As

Publication number Publication date
DE69316908D1 (de) 1998-03-12
AU5378194A (en) 1994-05-09
NL9201804A (nl) 1994-05-16
EP0665917A1 (fr) 1995-08-09
WO1994009214A1 (fr) 1994-04-28
DE69316908T2 (de) 1998-05-28

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