FR2688245A1 - WATERPROOF WALL FORMED BY PALLETS AND METHOD FOR PRODUCING THE WALL. - Google Patents

Abstract

The invention relates to a double sealed wall formed of sheet piles, in particular for sealing waste landfills, using driving elements (4) composed of double T elements (1), intermediate Z sections ( 2) and metal fasteners (3), it being specified that the edges (10) of the profiles (2) have a thickened cross section in the shape of a club, that an edge (10) is bent, and that the profiles (2) are interconnected using fastening elements (3). In this wall, the fastening element (3) constitutes a pull-on fastening element (7) which defines, with the end zones (8) of the profiles (2) of the neighboring element (4), a sealing chamber (11) which is filled with a sealing compound.

Description

Watertight wall formed of sheet piles and method for making the

  Wall The present invention relates to a watertight wall intended for waste discharges and formed of sheet piles composed of double T elements, intermediate Z-sections and metal fastening elements, it being specified that the edges of the intermediate Z-sections have a thickened club-shaped cross section and an edge is bent, and the intermediate Z-sections are connected

  between them using the metal fastening elements.

  The invention also relates to a method for carrying out the

waterproof wall.

  Landfills with a high risk potential, in particular in the presence of high ground water, even current, must be shielded in order to prevent an emission of polluting substances in the surrounding ground, in the underground water pipes or

in receiving rivers.

  A tight wall surrounding a landfill is subject to very high requirements It must for example present

  several sealing elements.

  A permanent functional check (tightness check) and a simple possibility of retouching in the event of possible faults are also desirable, as well as the possibility of carrying out a flow slope towards the discharge inside the waterproof wall, which prevents a broadcast

  and at the same time allows the discharge to dry.

  To make watertight walls of this type, it is preferable to use walls which avoid having to dig an already contaminated site, near an old landfill, because such masses of cuttings are then considered as waste and must make subject to costly purification Double-walled sheet piles driven into the ground using a threshing device are suitable. To combine sheet piles, means are known for connecting together and to other elements, supports and profiles, in different ways, Z-shaped sheet piles comprising connecting profiles in the shape of clubs extending along the edges, using metal fastening elements in H. According to DE-OS 28 19 737, in particular FIG. 4 a, a sealed wall made of sheet piles is known using double T elements and intermediate Z profiles, the edges are thickened in the shape of clubs, in cross section, in order to be connected using metal fastening elements This known wall is double Four intermediate profiles in Z are tightly connected to the wings of each element in double T The free edges of the intermediate Z profiles are bent (v figure 1) On one side of the wall section, the metal fastening elements surrounding the club-shaped edges are connected tench to the intermediate Z-shaped profiles and constitute a fastening element to be threaded, a sealed contact being made between it and the bent end zone introduced by the intermediate Z-shaped profile. A method for sealing the sheet pile joints before l the threshing operation is described in DE 21 42 957 C 3 This process provides for introducing into the sheet pile joints a plastic material which solidifies to form a cellular product To seal discharges in which corrosive materials can also be deposited , this process is only applicable in a way

  limited, if at all applicable.

  From the state of the art, the invention aims to develop a barrier wall which is made of sheet piles, which is waterproof and which allows a permanent tightness control, touch-ups and simple realization. This object is achieved by a watertight wall of the type specified in the introduction, which is characterized in that it is constructed from elements to be inserted by prefabricated threshing connected to each other, in that each element to be inserted consists of '' a double-T element and four intermediate Z-sections which can be connected to each other at the factory, in a watertight way, preferably by welding, and on which is then mounted a metal fastening element With four edges of the double T element are connected by a weld joint four intermediate Z profiles, so as to form, on both sides, sealing chambers and, thus, a double wall The sealing chamber filled with a mass sealing also acts as bilateral sealing If, despite this, a leak appears after a certain time, the penetrating liquid would only reach between the profiles to the chamber, in which it could be detected It is advantageous for this that the solder joints provided between elements applied one against the other, for example between the free ends of the Z-shaped connection profiles, are made in a non-continuous manner This allows also detect leaks in the area of the fasteners

metal, in the rooms.

  According to other features of the present invention, the free end zones of two intermediate Z-shaped profiles which are not connected to the double-T element are applied against each other, in pairs, by defining closed cells on either side of the central branch of the H-shaped element The edges of the free end zones applied against each other are

  angled outward, defining a certain spacing.

  On one side of the push-in element, a fastening element surrounding the club-shaped edges is connected to the intermediate Z-profiles by sealed and continuous weld joints, said fastening element constituting a fastening element to According to another characteristic, a sealing chamber is defined between the attachment element to be threaded by an element to be inserted and the free bent end zones introduced into said attachment element, and finally the chamber. sealing is filled with a

sealing mass.

  Advantageously, the watertight wall has corner parts and elbow parts. For the elbow parts, one or more intermediate Z-shaped intermediate sections are mounted at an edge of the H-shaped element, while for the corner parts, a pair of intermediate Z-shaped profiles is fixedly and tightly connected to the edges of a wing of the double-T element. According to another characteristic, the intermediate Z-shaped profiles are connected between them, at their free end zones applied one against the other, by

non-continuous solder joints.

  The metal fastener has an H-shaped configuration and consists of two curved upper wings that face each other and are connected to each other by a straight branch. But it can also be defined by two metal H-fasteners in which the lower right wing is only provided on one side of the right branch, and which are firmly connected to each other continuously, at a

  end, and not continuously, at the other end.

  The sealing mass provided in the sealing chamber is an expandable sealing mass La

  cross section of said sealing chamber is square.

  The fixed object is also achieved by a method of the type described in the introduction, which is characterized in that the elements to be inserted each provided with a continuous square flat steel filling the open sealing chamber and detachably fixed therein. , are hammered into the ground continuously and successively, using a wide threshing helmet, it being specified that the following element to be inserted, with its attachment element to be put on, is pressed by threshing so as to surround the edges of the free end zones of the Z-profiles of the previous push-in element, in that, once the next push-in element is pressed, the flat steel is removed from the sealing of the previous element to be inserted, and in that the sealing chamber is permanently filled with

  sealing compound after the flat steel has been removed.

  Thanks to the fact that the elements are driven into the ground using a device, it is not necessary to remove masses of contaminated earth, which poses the problem of purification as it appears with a structure

of underground curtain.

  Since the sealed wall is double, a permanent check of the tightness by known methods can be done. For this purpose, humidity detectors can for example be placed in the free cells of the elements to be inserted. If leaks are noted, the defect can be eliminated by replacing the push-in element or by filling it with a material

  sealant like bentonite, for example.

  The free cells of the sheet pile can also be used to produce a defined flow slope for the evacuation of liquid out of the landfill For this purpose, pumps bring up the liquid accumulating in these cells For mounting and sealing of the wall, prefabricated elements to be inserted are hammered in continuously and successively using a threshing device. It is advantageous, for this, to use a wide threshing helmet. to free cells over a great height, it is also advantageous for the element to be inserted to have a special foot configuration which quickly causes the

buffer formation.

  The elements to be inserted comprise, in their sealing chamber, a preferably square flat steel which is removably fixed in said chamber. Advantageously, the element to be inserted comprising the sealing chamber must be inserted in the threshing direction, so that the next element, with the threaded fastening element which constitutes an empty chamber, can be pushed in around the edges of the free end zone and, thus, the sealing chamber Square steel can then

  be removed from the sealing chamber and reused.

  The square free space thus obtained is then completely filled, over its entire height, with a sealing mass, preferably a mass of expandable plastic material. The filling can be done with a thickening liquid, using lances of injection at high pressure, or with a malleable mass which is introduced in sections from bottom to top and packed with a punch The infiltration pathways existing at the level of each element

  fasteners are thus sealed.

  Discharges can be surrounded by this watertight wall so that polluting substances do not

  cannot escape into the surrounding terrain.

  Other objects, advantages and characteristics of the present invention will emerge more clearly from the

  following detailed description of embodiments of

  the latter, given by way of non-limiting example with reference to the appended drawings in which: FIG. 1 is a top view of an element to be driven in by threshing with, on one side, an attachment element to be put on and, on the other side, a fastening element comprising a flat steel in a sealing chamber, FIG. 2 is a top view of a connection by fastening elements formed by two metal fastening elements Peiner serving as fastening elements to be threaded, and a sealing chamber containing a flat steel, FIG. 3 is a top view of a connection by fastening elements formed by a fastening element to be threaded and a sealing chamber containing an expandable sealing mass, FIG. 4 is a top view of a sealing wall comprising a wall part provided with an angular configuration at 30 degrees on one side, FIG. 5 is a top view of a watertight wall comprising a part d th wall provided with an angular configuration at 30 degrees on each side, and FIG. 6 is a top view of a watertight wall comprising a wall portion provided with a configuration

angular at 90 degrees.

  The push-in element 4 shown in FIG. 1 consists of a double T element 1, four intermediate Z-shaped sections 2, a metal fastening element 3 provided at the club-shaped edges 10 of the free end zones 8 of the intermediate profiles in Z 2, and of a flat steel 13 provided in the sealing chamber 11 which is defined by the other club-shaped edges 10 of the

  free ends 8 of the intermediate profiles in Z 2.

  The intermediate profiles in Z 2 are tightly connected to the edges 18 of the double T element 1 by solder joints 14, and define on both sides of the central branch 6 of the element 1 of the free cells 5 The j welded anointed holes 14 provided between the club-shaped edges 10 and the wings 21 of the attachment element 3 must be sealed from one end to the other At their end zones 8, the intermediate profiles in Z 2 are provided with solder joints 20 which must not

necessarily be waterproof.

  The threaded fastening element 7 is on the side of

  the push-in element 4 opposite to the threshing direction 9.

  FIG. 2 shows a connection by fastening elements between two push-in elements 4 a, 4 b, with which two metal fastening elements 23 reproduced by means of the removal of a wing-forming element are joined by welding at two points 14, 20, at their surfaces

lower 24.

  The weld joint 20 directed in the direction of threshing is not continuous or leaktight, unlike the weld joint 14 located at the other end of the lower surface 24. In the sealing chamber 11, which is defined by the club-shaped ends 10 of the two end zones 8 of the previous push-in member 4 b, is a flat steel 13 which can be removed once the next push-in member 4 has been pushed in Figure 3 shows connections by fastening elements comprising a sealing chamber 11 already filled with an expandable sealing mass 12 The metal fastening element 3 visible in the figure has a continuous and straight branch 22 which

  connects the domed wings 21 of the attachment element.

  FIGS. 4 to 6 show different zones of sealed wall comprising corner and elbow portions 16, 17,

  17 a which define different angles 28, 29.

  Figure 4 shows an elbow part 17 a which allows an angle 28 of 30 degrees to be obtained. For this purpose, an intermediate Z-shaped short section 2 aa has been mounted on the double T element 1 The use of two intermediate profiles in Z 2 a at different edges 18 of the rear surface 19 of the double-T element 1 makes it possible to produce two angles 28 of 30 degrees (fig 5) or an angle 29 of 90 degrees (fig. 6), according to how Z 2 a profiles are welded

  at the edges 18 of the double T element 1.

Claims (8)

  1 Double watertight wall formed from sheet piles, in particular for sealing waste landfills, using double T elements (1), intermediate Z-sections (2) and metal fastening elements (3), being specified that the edges (10) of the intermediate Z-sections (2) have a thickened cross-section in the shape of a club, that one edge (10) is bent, and that the intermediate Z-sections (2) are interconnected with the using metal fastening elements (3), characterized in that the sealing wall is constructed from prefabricated ramming elements (4) connected to each other, in that each ramming element ( 4) consists of a double T element (1), four intermediate Z profiles (2) and a metal fastening element (3), it being specified that each of the four intermediate Z profiles (2) is tightly connected at one of its edges (10), to an edge (18) of the T-shaped element (1) by a sealed and continuous weld joint (14), that the free end zones (8) of two intermediate profiles in Z (2) which are not connected to the double-T element (1) are applied one against the other, in pairs, defining closed cells (5) on either side of the central branch (6) of the double-T element (1), that the edges (10) of the free end zones (8) applied one against the other are bent towards the outside, defining a certain spacing, and that on one side of the push-in element (4), a fastening element (3) surrounding the club-shaped edges is connected to the intermediate Z-shaped profiles (2) by sealing and continuous weld joints (14) , said fastener (3) constituting a threaded fastener (7), in that a sealing chamber (11) is defined between the threaded fastener (7) of a push-in element (4) and the free end zones (8) bent introduced into said fastening element (7), and in that the sealing chamber   (11) is filled with a sealing mass (12).   2 watertight wall according to claim 1, characterized in that it has corner parts (16) and elbow parts (17, 17 a). 3 watertight wall according to claim 2, characterized in that for the elbow parts (17, 17 a), one or more short Z intermediate sections (2 a) are   mounted at an edge (18) of the double T element (1).   4 watertight wall according to claim 2, characterized in that for corner portions (16), a pair of intermediate Z-shaped profiles (2) is fixedly and tightly connected to the edges (18) of a wing (19 ) of the element in double T (1).   5 Watertight wall according to any one of   Claims 1 to 4, characterized in that the profiles   Z intermediaries (2) are interconnected, at their free end zones (8) applied one against   the other, by non-continuous solder joints (20).   6 Watertight wall according to any one of   claims 1 to 5, characterized in that the element   metal attachment (3) has an H configuration and consists of two curved upper wings (21) which are   face and are interconnected by a straight branch (22).   7 Watertight wall according to any one of   claims 1 to 5, characterized in that the element   metal fastening element (3) is defined by two metal H-shaped fastening elements (23) in which the lower right wing (24) is only provided on one side of the right arm (22), and which are firmly connected to each other continuously, at one end, and not continuously, at the other extremity.   8 Watertight wall according to any one of   claims 1 to 7, characterized in that the mass   sealing (12) provided in the sealing chamber (11)   is an expandable sealant.   il 9 Watertight wall according to any one of   Claims 1 to 8, characterized in that the cross-section   transverse of the sealing chamber (11) is square.   l O. Process for the production of a watertight wall   according to any one of claims 1 to 9, characterized   in that the push-in elements (4) each provided with a continuous square flat steel (13) filling the open sealing chamber (11) and detachably fixed therein, are hammered into the soil of continuously and successively, using a wide threshing helmet, it being specified that the following push-in element (4 a), with its threaded fastening element (7), is hammered in so as to surround the edges (10) of the free end zones (8) of the Z-profiles (2) of the previous push-in element (4 b), in that, once the next push-in element (4 a ) is pushed in, the flat steel (13) is removed from the sealing chamber of the previous push-in element (4 b), and in that the sealing chamber (11) is permanently filled with a sealing compound (12)   after the flat steel (13) has been removed.