FR3092346A1 - CONNECTION DEVICE FOR CONCRETE WALL ELEMENTS, CONCRETE BARRIER AND RELATED PROCESS - Google Patents

Abstract

- Connection device for concrete wall elements, concrete barrier and related process. - The invention relates to a device for connecting a first and a second low wall element (1, 2) made of concrete, comprising a first connecting element (4) intended to be secured to the first low wall element (1) , a second connecting element (5) intended to be secured to the second wall element (2) and a first connector (6) designed to attach said first and second connecting elements (4, 5) to each other, said connecting device being characterized in that it comprises means (7) for adapting the position of the first connector (6) relative to the second connecting element (5), said adaptation means (7) allowing a plurality of possible relative positions of the first connector (6) and of the second connecting element (5) in the longitudinal direction (D), said first connector (6) being provided with locking means (6A) designed to immobilize said first connector (6) and second connecting element (5) in each of said positions possible relative ions. - Connection of concrete wall elements. - Figure for the abstract: figure 2.

Description

CONNECTING DEVICE FOR CONCRETE WALL ELEMENTS, CONCRETE BARRIER AND RELATED METHOD

The present invention relates to the general technical field of concrete safety barriers intended to be installed along traffic lanes, and in particular road traffic lanes, on a permanent or temporary basis, and in particular to the field of concrete retaining devices reinforced forming barriers or impassable dividing walls, intended in particular to be installed on central reservations or the shoulders of motorways or expressways.

The present invention relates more particularly to a device for connecting a first and a second concrete wall element remote from each other and which are intended to form part of the same safety barrier for a traffic lane. road, said safety barrier being intended to extend along said lane in a longitudinal direction, said connecting device comprising at least a first connecting element intended to be secured to the first wall element, a second connecting element intended to be secured to the second wall element and a first connector designed to attach said first and second connecting elements to each other.

The present invention also relates to a safety barrier for a road traffic lane, said safety barrier being intended to extend along said lane in a longitudinal direction, and comprising first and second concrete wall elements spaced apart one another.

The present invention finally relates to a method for producing a safety barrier for a road traffic lane, said safety barrier being intended to extend along said lane in a longitudinal direction.

It is known to use impassable concrete dividing walls to separate traffic lanes and thus ensure the safety of users of the lanes in question.

These dividing walls are generally cast in place continuously, for example by means of a slipform machine allowing the wall to be cast in place by extrusion, according to a predetermined profile. The most common profiles are, for example, the MVL profile (“ Light V éhicule s Wall ” ), the GBA profile ( “ Adherent Concrete Slider ” ), DBA ( “ Double Adherent Concrete ” ) or even for example LBA (“ L ourde B eton A dhérent ”). These cast-in-place restraint systems offer excellent resistance to crossing, as well as remarkable impact resistance, due in particular to the fact that they are solidarized by construction with the roadway. These cast-in-place walls are also particularly quick to install by extrusion thanks to the aforementioned slipforming machines, which can reach high speeds of several hundred linear meters per day.

These concrete safety barriers, as well as their production method, are therefore generally satisfactory, but nevertheless have certain drawbacks inherent in the pour-in-place technique. In particular, if these cast-in-place barriers are particularly effective as permanent protection, they are however not suitable for use as temporary protection, in the context of a central reservation development site, for example. The maintenance and repair operations of these barriers cast in place can also prove to be tedious and dangerous.

This is why a mobile separator has been proposed consisting of prefabricated reinforced concrete elements having a profile similar to the standard profile of low walls cast in place. The barrier can thus be made up of a line of these prefabricated elements arranged on the ground and interconnected by pin and plate connection systems. This system of prefabricated elements makes it possible to obtain a modular barrier which can be assembled and disassembled very easily and quickly, which reduces the time of intervention and therefore reduces the risk of accident. It is in particular possible, during development or repair work on the tracks or spaces located in the vicinity of the tracks (central reservation for example) to initially install the modular barrier as protection on the worksite on the way, on a provisional basis, then once the work is completed, to move the modular barrier into a final position of separation. This mobile separation system thus makes it possible to easily switch from an SMV configuration (“ Mobile Lane Separator ” ) to a TPC configuration ( “ Earth-P lein C entral ” ) and vice versa .

Such a modular concrete barrier system, based on the use of prefabricated elements arranged on the ground one after the other, is therefore generally satisfactory, but nevertheless also has certain serious drawbacks. Indeed, the prefabricated concrete elements referred to above being simply placed on the ground, it is possible that they can, despite their large mass, be moved under the effect of an impact with a vehicle, for example a heavy goods vehicle. Such localized displacement of one or more prefabricated elements in response to a vehicle impact is generally not problematic, except in certain particular areas where specific equipment is located, such as for example a sign post, a bridge pier or any other element of a work of art. The prefabricated concrete elements moved by the impact risk in turn colliding with the sensitive elements in question (post, bridge pier, etc.) and thus damaging them.

The combination of barrier sections cast in place and barrier sections formed by rows of prefabricated elements to solve the aforementioned problem is generally considered impossible to implement in practice, except to refrain from dismantling and reassembling the sections of barriers made of prefabricated elements. Indeed, it is not possible in practice to reassemble identically a section of barrier formed of a line of prefabricated concrete elements. There will necessarily be a slight shift in position of each prefabricated element, which will result in the end in a difference in length of the barrier section which can be significant, for example of the order of 15 to 17 cm for one kilometer of barrier. This significant, uncontrolled deviation, the exact value of which cannot be predicted, prevents the combination of fixed elements cast in place and mobile prefabricated elements. This significant deviation is also likely to generate a local interruption of the barrier, thus forming sharp edges and other protruding parts that are extremely dangerous for users of the traffic lanes.

The objects assigned to the invention therefore aim to remedy the various drawbacks listed above and to propose a new connection device making it possible to form a single and same safety barrier for a road traffic lane capable of associating sections formed of elements precast concrete and cast-in-place concrete sections, in an extremely simple, fast and safe manner, the barrier likely to be thus obtained having a high level of safety and a controlled cost price.

Another object of the invention aims to provide a new connection device for concrete safety barrier elements of particularly simple and robust design.

Another object of the invention aims to propose a new connection device for concrete safety barrier elements which makes it possible to adapt to very varied environments and constraints.

Another object of the invention aims to provide a new connection device for concrete safety barrier elements which is extremely simple to use.

Another object of the invention aims to provide a new connection device for concrete safety barrier elements which makes it possible to give the barrier an extremely rigid character and a high degree of impassability.

Another object of the invention aims to propose a new connection device for concrete safety barrier elements which makes it possible to obtain a particularly safe safety barrier for the users of the traffic routes concerned.

Another object of the invention aims to provide a new safety barrier for road traffic lane which has a modular character, is capable of being dismantled, moved and reassembled very easily, while providing an excellent degree of protection including for sensitive equipment (pole, bridge pier, etc.) placed punctually near the track.

Another object of the invention aims to provide a new method for producing a safety barrier for a road traffic lane which, while being extremely simple, quick and safe to implement, makes it possible to combine cast concrete elements in place and precast concrete elements.

The objects assigned to the invention are achieved with the aid of a device for connecting a first and a second concrete wall element remote from each other and which are intended to form part of a same safety barrier for road traffic lane, said safety barrier being intended to extend along said lane in a longitudinal direction, said connection device comprising at least a first connecting element intended to be secured to the first element wall, a second connecting element intended to be secured to the second wall element and a first connector designed to attach said first and second connecting elements to each other, said connecting device being characterized in that it also comprises a means of adaptation of the position of the first connector relative to the second connecting element in said longitudinal direction, said adaptation means allowing a plurality of positions possible relative positions of the first connector and of the second connecting element in said longitudinal direction, said first connector being provided with locking means designed to immobilize at least in said longitudinal direction said first connector and second connecting element in each of said possible relative positions .

The objects assigned to the invention are also achieved with the aid of a safety barrier for a road traffic lane, said safety barrier being intended to extend along said lane in a longitudinal direction, and comprising a first and a second concrete wall element spaced from each other, said barrier being characterized in that it comprises a connection device in accordance with the above, said first connecting element being integral with the first wall element, while said second connecting element is integral with the second wall element, the first connector attaching between them said first and second connecting elements.

The objects assigned to the invention are finally achieved with the aid of a method for producing a safety barrier for a road traffic lane, said safety barrier being intended to extend along said lane in a direction longitudinal, said method comprising:
- a step of making or supplying a first element of concrete low wall to which is secured, or made integral, a first connecting element, said first low wall element being intended to form part of said safety barrier,
- a step of making or supplying a second concrete wall element to which is secured, or made integral, a second connecting element, said second wall element being intended to form part of said safety barrier, said first and second concrete wall elements being arranged at a distance from each other,
- a mutual connection step of said first and second concrete wall elements including:
- an operation of supplying a first connector designed to attach said first and second connecting elements to each other,
- an operation of adapting the position of the first connector relative to the second connecting element in said longitudinal direction, using an adaptation means allowing a plurality of possible relative positions of the first connector and of the second connecting element along said longitudinal direction, in order to place said first connector and second connecting element in one of said possible relative positions,
- a locking operation of said first connector using a locking means designed to immobilize at least in said longitudinal direction said first connector and second connecting element in each of said possible relative positions, said locking operation making it possible to immobilize at least in said longitudinal direction said first connector and second connecting element in said relative position in which said first connector and second connecting element are placed at the end of said adaptation operation.

Other features and advantages of the invention will appear in more detail on reading the following detailed description, with reference to the appended drawings, given by way of purely illustrative and non-limiting example, in which:

illustrates, in a schematic elevational view, a portion of safety barrier for a roadway according to the invention, said barrier implementing a connection device according to the invention, said connection device including a cover shown in transparency to view other elements of the connection device present under said cover.

is a view in longitudinal section of a construction detail of figure 1, showing elements of the connection device according to the invention implemented in the barrier of figure 1.

illustrates, according to a schematic view in longitudinal section, the construction detail of Figure 2 with the first connector and second connecting element of the connection device in a relative position different from that corresponding to the configuration of Figures 1 and 2.

illustrates, in a schematic perspective view, a detail of the safety barrier of Figure 1.

illustrates, according to a schematic perspective view from below, the detail of figure 4.

illustrates, according to a schematic cross-sectional view AA, the barrier portion of Figure 1.

illustrates in a schematic perspective view, a cover which is part of the connection device according to the invention implemented to form the barrier of the preceding figures.

illustrates the second connecting element of the connection device according to the invention, formed in this case by a metal spar provided with an oblong slot forming an adaptation means.

illustrates in a front view the second connecting element of Figures 8.

illustrates on the one hand a metal rod with a threaded end forming the first connector of the connection device and on the other hand a metal stake intended to form a second connector of the connection device.

illustrates a longitudinal sectional view of the second connecting element of Figure 8.

illustrates, according to a schematic perspective view, a sub-assembly obtained at the end of a step of producing a second concrete wall element to which the second connecting element of Figures 8, 9 and 11 is made integral, second connecting element which emerges at the front of said second concrete wall element to which it is sealed.

illustrates a step of fixing the sub-assembly of figure 12 to the ground using the metal stake of figure 10.

illustrates the subassembly obtained at the end of a step of supplying the first concrete wall element arranged so as to overlap at least in part the portion of the second connector which emerges from the second concrete wall element, so as to position in line with the oblong slot provided in the second connecting element two stepped rings integral with the first wall element and forming the first connecting element.

illustrates an operation consisting in attaching the first and second connecting elements to each other by means of the rod with a threaded end in Figure 10.

illustrates a cowling step subsequent to the step of FIG. 15, during which both the first and the second wall element are capped with the cowl of FIG. 7, the latter extending astride said first and second wall elements and being represented transparently.

According to a first aspect, the invention relates as such to a device for connecting a first element of concrete wall 1 and a second element of concrete wall 2, preferably reinforced, which are in this case distant from each other and intended to be part of the same safety barrier 3 for road traffic lane (not shown). A portion of this barrier 3 is illustrated in particular in FIG. 1. Such a concrete safety barrier 3 is intended to extend along the road traffic lane concerned, in a longitudinal direction D to separate, for example, the roadway from the roadside or separate two lanes of traffic in opposite directions. Such a concrete safety barrier meets various standards and technical requirements well known in the field, in particular in order to present an impassable character.

To this end, the safety barrier 3 is made of reinforced concrete and has a continuous character, as well as a profile and dimensions which make it capable of effectively resisting a vehicle impact, preventing the latter from crossing the barrier 3. The invention also relates as such to the safety barrier 3 comprising said connection device.

In the preferred embodiment illustrated in the figures, said first low wall element 1 is prefabricated and intended to be placed on the ground. More specifically, the first low wall element 1 advantageously consists of a mobile reinforced concrete element having a length of several meters (for example approximately 4 m) as well as a standardized profile, for example a profile of the MVL, GBA, DBA or LBA. Preferably, as illustrated in the figures, the first low wall element 1 is in the form of a prefabricated reinforced concrete element, having for example a symmetrical profile of the DBA type or the like, with an enlarged base as visible in the figures. . Preferably, said first wall element 1 is provided with a longitudinal recess 110, formed under the base of the first wall element 1 and extending longitudinally, preferably continuously, advantageously over the entire length of the first wall element 1 as shown in the figures. The second low wall element 2 is for its part advantageously cast in place, that is to say that it is formed directly along the track by means of a suitable formwork installed on the track. In this case, the second low wall element 2 is not prefabricated and is produced directly along the track, so as to be integral with the roadway by construction. Preferably, the safety barrier 3 according to the invention thus comprises:
- a first portion of low wall 3A cast in place,
- a second wall portion 3B formed by a line of prefabricated wall elements 1, 10, 20 attached one after the other, said first wall element 1 forming part of said line and being arranged at one end of said file as shown,
- and preferably a transition portion 3C cast in place between said first and second portions 3A, 3B, in the continuity of the first wall portion 3A, so that the transition portion 3C extends directly in the extension of the first portion of wall 3A, from the latter, without interruption between the first portion of wall 3A and the transition portion 3C.

The transition portion 3C, on the other hand, is separate and independent from the second portion of low wall 3B, and advantageously ends at a distance from said second portion of low wall 3B. In the embodiment illustrated in the figures, said transition portion 3C forms said second wall element 2 intended to be connected to the first wall element 1. Preferably, the first wall portion 3A is cast in place by extrusion, for example by means of a slipform machine known as such, in order to form an adherent concrete separator, having for example an asymmetrical profile of the GBA type. This first portion of low wall 3A cast in place is advantageously intended to be placed opposite and/or in the vicinity of sensitive equipment, for example a bridge pier or a sign post, requiring the safety barrier to be in this location. particularly rigid and unmovable, to prevent it from colliding with the equipment concerned (post, bridge pier or other) under the effect of the impact of a vehicle accidentally leaving the roadway. The transition portion 3C is also preferably cast in place, for example by means of a specific formwork positioned from the free end of the first wall portion 3A, so that the transition portion 3C forms an extension terminal of the first portion of low wall 3A. The realization of the transition portion 3C cast in place in the immediate and continuous extension of the first portion of low wall 3A thus makes it possible to produce an end perfectly adapted to the connection to the portion of low wall 3B advantageously formed by a line of low wall elements prefabricated. The invention is however absolutely not limited to the implementation of a transition portion 3C distinct from the first portion of low wall 3A, and it is perfectly possible that the transition portion 3C and the first portion of low wall 3A are formed from one and the same continuously extruded piece, for example.

The second wall portion 3B is itself composed of prefabricated wall elements 1, 10, 20, which are preferably all identical and for example interconnected by means of a system with threaded connecting rods and metal rings such than that described in the patent published under the number FR-2 810 055.

Preferably, the first wall element 1 has a section with a substantially constant contour, corresponding for example to a substantially symmetrical profile with an enlarged base of the DBA type, while the second wall element 2 has a section whose contour varies along said second wall element 2.

The latter has, in a first end zone 2A facing the first wall element 1, a section whose contour is substantially identical to that of the section of the first wall element 1. Advantageously, the second wall element 2 has , in a second end zone of 2B opposite said first end zone 2A, a section whose outline is substantially identical to that of the section of the first portion of low wall 3A advantageously cast in place. Between these first and second end zones 2A, 2B, the second low wall element 2 advantageously has a cross-section, the contour of which evolves progressively from a first contour substantially corresponding to that of the cross-section of the first low wall element 1, to a second contour corresponding substantially to that of the section of the second wall element 2. Thus, the transition portion 3C, advantageously forming said second wall element 2, ensures a progressive profile transition between the profile of the first wall portion 3A, by example of the asymmetrical type GBA, and the profile of the second portion of low wall 3B, for example of the symmetrical type DBA. The transition portion 3C, advantageously formed by the second low wall element 2, therefore not only makes it possible to produce a suitable end for the connection of the first and second low wall elements 1, 2 but also to operate a gradual transition in section between the first portion of wall 3A cast in place and the second portion of wall 3B formed by the line of prefabricated wall elements 1, 10, 20 attached one behind the other. Of course, the invention is not limited to this specific embodiment and it is for example perfectly possible that the profile of the first portion of low wall 3A is substantially identical to the profile of the second portion of low wall 3B.

The safety barrier 3 according to the invention, preferably combining a first portion of wall 3A cast in place and a second portion of wall 3B formed by a line of prefabricated wall elements 1, 10, 20 attached to each other allows you to benefit from:
- remarkable resistance to shocks and crossings at the level of the cast-in-place portion, which can therefore be installed opposite or in the vicinity of sensitive areas to be protected (bridge pier, post, etc.);
- And, apart from the aforementioned sensitive areas, the maneuverability and versatility associated with the prefabricated wall elements 1, 10, 20, which allow easy installation and use as temporary site protection.

A security barrier 3 comprising on the one hand a first portion of wall 3A cast in place and on the other hand a second portion of the wall 3B formed by a row of prefabricated wall elements attached one after the other, said first portion of low wall 3A and second portion of low wall 3B also being attached to one another, by any suitable connecting device, moreover constitutes as such a distinct and independent invention.

Preferably, however, the connection of the first and second wall elements 1, 2 is implemented by means of the connection device according to the invention which will now be described in more detail. Said connecting device comprises at least a first connecting element 4 intended to be secured to the first low wall element 1, said first connecting element 4 preferably being permanently secured to the first low wall element 1, being attached in a fixed manner and permanent to the latter. Preferably, the first connecting element 4 forms at least one orifice. Said first connecting element 4 comprises for example at least a first metal ring anchored at one end of said first wall element 1, and preferably a second metal ring also anchored at said end of the first wall element 1 and coaxial with said first ring metal, said first and second rings being stepped as illustrated in the figures and in accordance with the teaching of patent FR-2 810 055. The first connecting element 4 is therefore advantageously formed by the stepped horizontal connecting rings with which the elements are usually provided. prefabricated walls usually used to form mobile road barriers. Preferably, the first low wall element 1 is similar to the prefabricated low wall element described in the aforementioned patent FR-2,810,055.

The connection device according to the invention also comprises a second connecting element 5 intended to be secured to the second wall element 2. The second connecting element 5 advantageously comprises, and as illustrated in the figures, at least one metal spar extending longitudinally between a first end 5A intended to be preferably arranged under the first low wall element 1 and a second end 5B, opposite to said first end 5A, intended to be arranged for its part preferably under said second low wall element 2. More precisely, in the particular embodiment illustrated in the figures, the end portion of the spar terminated by the first end 5A is intended to be inserted into the recess 110 made under the base of the first low wall element 1, so as to hand rest on the ground and secondly be capped by the first low wall element 1. The opposite end portion ending in the second end 5B is also intended to rest on the ground and to be covered by the second low wall element 2. In the preferential case where the second low wall element 2 is cast in place, the second end 5B is intended to be positioned in the formwork beforehand pouring operations in place so as to be anchored in the second low wall 2 after setting of the concrete constituting the latter. In this preferred embodiment, the second wall element 2 and the spar forming the second connecting element 5 form a non-removable one-piece unitary subassembly illustrated by FIG. 12. Advantageously, said second connecting element 5 comprises a horizontal panel 50 which forms advantageously an upper wall of said spar. The latter comprises, in addition to said upper wall formed by said horizontal panel 50, side wings 51, 52 which extend on each side of the horizontal panel 50 from the lateral edges of the latter, in a divergent manner. Preferably, said spar also comprises one or more spacers 53, 54, for example arranged under the upper wall formed by the horizontal panel 50 and connecting said side wings 51, 52 to form a rigid assembly whose profile is substantially conjugate to the profile of the recess 110 advantageously provided under the base of the first low wall element 1.

As illustrated in the figures, the connecting device also comprises a first connector 6 designed to attach said first and second connecting elements 4, 5 to each other, in order to establish a mechanical connection between them, and therefore between the first and second connecting elements. wall 1, 2 to which they are respectively attached. In the particular embodiment illustrated in the figures, the first connector 6 advantageously comprises a metal rod whose section is adjusted to that of said orifice formed by the first connecting element 4, orifice in which the metal rod is intended to be threaded vertically, so as to establish a sliding connection or sliding pivot with a vertical axis between said metal rod and said first connecting element 4. More precisely, in the particular embodiment illustrated in the figures where the first connecting element is formed by a first and a second stepped metal rings, the metal rod of the first connector 6 is intended to be threaded vertically into the two rings in question, while its free lower end is intended to cooperate with the second connecting element 5 to thus attach said first and second connecting elements 4, 5. In other words, in the preferred embodiment illustrated shown in the figures, the free lower end of the metal rod is intended to be attached to the metal spar forming the second connecting element 5.

According to an important characteristic of the invention, the connection device also comprises a means 7 for adapting the position of the first connector 6 relative to the second connecting element 5 in said longitudinal direction D. More specifically, the adaptation means 7 allows a plurality of possible relative positions of the first connector 6 and of the second connecting element 5 in said longitudinal direction D. In other words, the adaptation means 7 makes it possible to adjust, in the longitudinal direction D, the position of the first connector 6 with respect to the second connecting element 5. This makes it possible to vary the position, along the longitudinal direction D, of the zone of the second connecting element 5 at the level of which the free lower end of the metal rod advantageously forming the first connecting element 4 cooperates with said spar. As illustrated in the figures, the first connector 6 is further provided with a locking means 6A designed to immobilize at least in said longitudinal direction D said first connector 6 and second connecting element 5 in each of said possible relative positions of the first connector 6 and the second connecting element 5. Thanks to the adaptation means 7, the position of the first wall element 1 relative to the unitary subassembly formed by the second wall element 2 and the second connecting element 5 emerging from the latter ( figure 12) can be adjusted, which amounts to adjusting the spacing E in the longitudinal direction D between the first low wall element 1 and the second low wall element 2. Once the first low wall element 1 is in a position adequate relative to the second wall element 2, which corresponds to one of the possible relative positions of the first connector 6 and the second connecting element 5, it is possible to immobilize, at least along the longitudinal direction D, that is to say preferably immobilize in translation along an axis parallel to the longitudinal direction D, the first connector 6 and second connecting element 5 in said relative position of said first connector 6 and second connecting element 5. This immobilization is carried out by means of the locking means 6A with which said first connector 6 is provided.

Thanks to these advantageous technical arrangements, the dismantling and reassembly of the row of prefabricated wall elements 1, 10, 20 of which the first wall element 1 advantageously forms part are facilitated. Indeed, when reassembling the prefabricated elements 1, 10, 20 in the permanent separation position (to return for example to the TPC configuration after having used the prefabricated separators 1, 10, 20 in the SMV configuration), the position of each element of prefabricated wall 1, 10, 20 will necessarily be slightly different from the position initially occupied before dismantling. This can cause, especially if the line of prefabricated wall elements 1, 10, 20 has a significant length, a significant difference in positioning of the first wall element 1 at the head of the line, difference resulting in the existence of a greater or lesser spacing E between the second wall element 2 and the first wall element 1, for example at least 15 cm for 1 km of line of prefabricated wall elements 1, 10, 20. The means of adjustment 7 makes it possible to absorb this variation in positioning of the first wall element 1 relative to the second wall element 2, while allowing a simple and robust connection of the second wall element 2 and the first wall element 1 whatever the value of said spacing E, provided of course that the latter is within a range authorized by the adaptation means 7. The locking means 6A cooperates with the adaptation means to thus allow the locking in position of the first connector 6 r relative to the second connecting element 5 whatever the relative position of the first connector 6 and of the second connecting element 5 in the range of relative positions authorized by the adaptation means 7.

The invention thus makes it possible to implement a security barrier 3 alternating first portions of low wall 3A cast in place (extended if necessary by respective transition portions 3C also cast in place), and second portions of low wall 3B formed by respective rows of prefabricated wall elements 1, 10, 20, while allowing the dismantling and reassembly of said rows of prefabricated wall elements without the operators having to deal with particular difficulties of reassembly. This makes it possible to dismantle a line of prefabricated elements to move them so that they act as a temporary protection barrier on the site (SMV), then to reassemble them in their initial position of permanent protection (TPC) easily, thanks to the ability adjustment of the spacing E offered by the adaptation means 7 and the locking means 6A.

Advantageously, the adaptation means 7 comprises an oblong slot 70 formed through the thickness of said horizontal panel 50, said oblong slot 70 being advantageously intended to be crossed by the free lower end of the metal rod which preferentially forms said first connector 6. Preferably, said metal rod extends for its part longitudinally between a manually operable operating head 60 and an opposite distal end piece 61 intended to pass through said oblong slot 70. Said operating head 60 has an imprint or a conformation (For example with several sides) which allows its rotation by means of a suitable tool (a key for example) by a user. Said head 60 and distal tip 61 are connected by an intermediate body 62 which advantageously has a smooth character. Preferably, the metal rod forming the first connector 6 comprises a shoulder between the distal tip 61 and the intermediate body 62, so that the distal tip 61 has a diameter smaller than that of the intermediate body 62. Advantageously, the means of lock 6A comprises on the one hand a nut 60A (shown in FIG. 11) arranged under the horizontal panel 50, in line with the oblong slot 70 and on the other hand a thread 610 (FIG. 10) carried by said distal end piece 61 and intended to cooperate with said nut 60A. It is thus possible to screw, via the operating head 60, the metal rod forming the first connector 6 into the nut 60A, so as to impart a tightening force immobilizing said first connector 6 and second connecting element 5 at least according to said longitudinal direction D. Advantageously, the nut 60A is designed to be able to slide along the oblong slot 70, under the latter, without however being able to turn on itself. The metal rod forming the first connector 6 can then be threaded into the stepped rings advantageously forming the first connecting element 4, so that the operating head 60 comes to rest on and against the first metal ring arranged above the second ring. metallic. The threaded distal end 61 for its part engages the nut 60A under the oblong slot 70, so that as screwing progresses, the nut 60A exerts a vertical thrust force against the horizontal panel 50, by below the latter, while the maneuvering head 60 itself exerts a vertical pressure force from top to bottom on the first connecting element 4, and more precisely on the first metal ring against which it bears. This has the consequence of pressing the spar against the first wall element 1, thus immobilizing in at least the longitudinal direction D, said spar relative to said metal rod forming the first connector 6.

Alternatively or additionally, the immobilization in said longitudinal direction D of said first connector 6 and second connecting element 5 can also be obtained by enclosing the panel 50 between the aforementioned shoulder and the nut 60A under the effect of the screwing of the threaded end 61 in the nut 60A. The panel 50 thus finds itself pressed between said shoulder and nut 60A, which prevents any relative movement of the first connector 6 and of the second connecting element 5 in the longitudinal direction D. The implementation of such an oblong slot 70 thus allows to easily adjust the relative position of the first connector 6 and of the second connecting element 5, by authorizing a multitude of relative positions along the oblong slot 70, which is for example equal to at least 30 cm long, preferably at least least 40 cm even more preferably at least 50 cm, preferably between 50 and 60 cm. The oblong opening 70 and the nut 60A movable along and under the latter thus make it possible to mutually attach the first and second wall elements 1, 2, with a spacing E between them which varies between a maximum value (corresponding to the situation of FIG. 2 where the distal tip 61 penetrates into the oblong lumen 70 at a front end 71 of the latter) and a minimum gap (corresponding to the situation of FIG. 3 where the distal tip 61 penetrates into the slot 70 at a rear end 72 opposite the latter, said rear end 72 being closer to the second wall element 2 than is the front end 71).

Advantageously, the spar forming the second connecting element 5 comprises a lower wall 55 arranged under, at a distance from, and parallel to, the upper wall formed by the horizontal panel 50, the space delimited between the upper 50 and lower 55 walls forming a housing for said nut 60A. Preferably, the reception housing in question is also delimited by two side walls which rise vertically from the side edges of the lower wall 55 up to the upper wall formed by said horizontal panel 50. For example, the wall bottom 55 and the two side walls form a U-shaped profile which delimits, with the horizontal panel 50, said housing for the nut 60A. This U-shaped profile can for example be produced by means of a steel beam having a UPE-type U-shaped profile welded to the horizontal panel 50, under the latter. Said nut 60A is for its part advantageously equipped with a guide means 600 allowing the nut 60A to slide in said receiving housing in the longitudinal direction D while preventing it from pivoting. The guide means 600 is for example formed by a metal plate, preferably parallelepipedic in shape, the width of which is substantially adjusted to that of the lower wall 55, so that said plate can slide longitudinally along the lower wall 55 but cannot turn on its own. The nut 60A is advantageously welded onto this metal plate 600. The invention is however not limited to this particular embodiment, and other guide means can be considered without departing from the scope of the invention.

Advantageously, the connection device comprises a third connecting element 8 intended to be anchored to one end of the second low wall element 2, as well as a second connector 9 designed to attach said second and third connecting elements 5, 8 to each other. Preferably, the third connecting element 8 is in a form substantially similar to that of the first connecting element 4, that is to say that it forms at least one orifice and comprises for example at least one third metal ring anchored at said end of the second wall element 2, and preferably a fourth metal ring anchored at said end of said second wall element 2 and coaxial with said third metal ring. Said third and fourth rings are preferably stepped and advantageously sealed in the concrete forming the second wall element 2, preferably at the time of pouring in place of the latter. The second connector 9 for its part advantageously comprises a metal stake 90, the section of the orifice formed by the connecting element 8 being advantageously adjusted to that of the metal stake 90, so that the metal stake 90 can be threaded vertically into said orifice, that is to say in this case in each of the orifices formed by the third and fourth stepped metal rings. Advantageously, the second connecting element 5 comprises a vertical through hole 11 whose section is adjusted to that of said metal pile 90, the latter being designed to be threaded vertically into said holes of the third connecting element 8 and of the second element link 5 and to be driven into the ground. Thanks to this technical arrangement, the attachment of the second connecting element 5 to the first low wall element 1 is mechanically reinforced, in addition to the sealing effect of the second connecting element 5 in the concrete forming the second low wall element 2. Furthermore, the unitary sub-assembly formed by the second wall element 2 and the second connecting element 5 is immobilized in position relative to the ground by the pile 90, which contributes to locally stiffening the barrier 3 obtained and to giving it resistance higher in displacement in the event of vehicle impact.

As mentioned above, the connection device allows a mutual spacing of the first wall element 1 and second wall element 2, in the longitudinal direction D, included in a range bounded by a minimum spacing value (Figure 3), equal by example to about thirty centimeters, and a maximum spacing value (FIG. 2) equal for example to about 70 cm. There is therefore permanently an empty space between the first and second wall elements 1, 2, which empty space is more or less important depending on the adjustment made by means of the adaptation means 7. This empty space could present a danger for users due to the break in continuity of the barrier 3 that it introduces. In order to remedy this drawback, the connection device advantageously comprises a cover 12, preferably metallic, intended to cover at least partially both said first and second wall elements 1, 2, so as to extend astride on them to ensure continuity between them. The cover 12 is advantageously made by means of metal sheets bent and welded according to a profile which is advantageously substantially combined with the respective profile of the first and second wall elements 1, 2 in the overlapping zones of the cover 12. For example, said cover 12 has an inverted U-shaped section with a web 12A intended to be opposite and above the respective top of said first and second wall elements 1, 2 and two lateral flanges 12B, 12C which extend on each side of said core 12A, according to profiles which follow that of the first and second wall elements 1, 2, for example profiles with several sections inclined with respect to each other (FIG. 7). Said wings 12B, 12C are advantageously intended to extend substantially to the ground, in order to completely mask the free space corresponding to the spacing E between the first and second wall elements 1, 2. Preferably, the device for connection also comprises fixing means 13, 14 for attaching said cover 12 both to the first and to the second wall element 1, 2. Said fixing means 13, 14 preferably ensure removable fixing of the cover 12 to the first and second elements wall 1, 2, in order to allow, as previously mentioned, a separation of the first and second wall elements with a view, for example, to using the line of prefabricated elements to which the first wall element 1 belongs as temporary site protection , before a possible reassembly in the initial configuration. The fixing means 13, 14 comprise for example, as illustrated in the figures, holes made at the base of the cover 12 and screws intended to pass through the holes in question to be anchored in a corresponding hole made at the level of the base of the wall element 1, 2 concerned. Preferably, the fixing means 13, 14 comprise a plurality of screws arranged in the lower part of each of the side wings 12B, 12C, in order to ensure a robust and durable fixing.

The connection device according to the invention thus makes it possible to form a particularly safe, reliable and versatile safety barrier 3, since some of its sections are able to be disassembled and then reinstalled in an extremely simple and rapid manner.

The invention also relates as such to a method for producing a safety barrier 3 for a road traffic lane, said safety barrier 3 preferably being in accordance with the preceding description, and comprising in particular a first and a second concrete wall element 1, 2 spaced from each other, as well as a connection device in accordance with the above and whose first connecting element 4 is integral with the first wall element 1, while the second connecting element 5 is integral with the second wall element 2, the first connector 6 attaching said first and second connecting elements 4, 5 to each other.

The preceding elements of description concerning the connection device and the safety barrier 3 therefore apply mutatis mutandis to the method described in detail in the following, and vice versa.

According to the invention, the method comprises a step of making or supplying a first element of low wall 1 made of concrete, preferably reinforced concrete, of which is integral, or rendered integral, a first connecting element 4, said first element wall 1 being intended to form part of said safety barrier 3. Preferably, said first concrete wall element 1 is in the form of a prefabricated block, said step of producing or supplying the first element of wall 1 comprising an operation of depositing said prefabricated block on the ground. The method according to the invention also comprises a step of making or supplying a second concrete wall element 2 with which is fixed, or made fixed, a second connecting element 5, said second wall element 2 being intended to part of said safety barrier 3, said first and second concrete wall elements 1, 2 being arranged at a distance from each other. As mentioned above, the first low wall element 1 advantageously has a section with a substantially constant outline, while said second low wall element 2 has a section whose outline varies along said second low wall element 2 to pass:
- of a first contour located at one end 2B of said second low wall element 2, end 2B which is preferably abutted with a portion of low wall 3A already present, which low wall portion 3A itself has a section of substantially constant contour, by GBA-like example,
- to a second contour located at the other end 2A of said second low wall element 2, other end 2A which is free and arranged opposite and at a distance from said first low wall element 1.

The first contour is advantageously substantially identical to said contour of the section of said wall portion 3A already present, while said second contour is substantially identical to that of the section of the first wall element 1. The second wall element 2 therefore aims to form a transition portion making it possible to pass gradually and continuously from the section contour of the low wall portion 3A already present, for example of the GBA type, to a section contour substantially corresponding to that of the first low wall element 1, and which presents for example a DBA-type profile.

Preferably, the step of making or supplying the second wall element 2 is carried out before the step of placing said prefabricated block forming the first wall element on the ground. Advantageously, the step of producing or supplying said second concrete wall element 2 comprises an operation of casting in place said second wall element 2, for example in the continuity of the wall portion 3A already present and itself obtained preferably by a cast-in-place process. Preferably, the method comprises, prior to the casting operation in place of said second element of the wall 2, an operation of preparing the portion of wall 3A already present, aimed at forming a suitable connection interface between the portion of wall 3A already present and the second wall element 2. This preparation operation preferably comprises vertical cutting of the wall portion 3A already present, for example by means of a thermal cutter, in order to produce a flat, vertical abutment face , having a section with a predetermined contour, for example corresponding to a profile of the GBA type. Said preparation operation then comprises a step of drilling holes in the abutment face in question, followed by the sealing, in the holes in question, of metal reinforcement bars which then protrude horizontally from the abutment face over a length predetermined. Preferably, an operation of transplanting the cutout zone, forming said abutment face, is also carried out, for example using a perforator, to impart to the abutment face in question a rough appearance which will improve the connection between the portion of low wall 3A and the second element of low wall 2. The preparation operation is then completed and the stage of making or supplying the second element of low wall 2 can begin. This step advantageously comprises, prior to the casting-in-place operation mentioned previously, an operation of placing a reinforcement cage in the volume intended to be subsequently occupied by the second wall element 2. The reinforcement cage includes advantageously means for anchoring the third connecting element 8, which is for example, as explained above, in the form of a third and a fourth metal ring each extended by anchoring lugs forming said means of anchoring.

Advantageously, the method comprises, prior to said operation of casting in place of the second wall element 2, an operation of placing on the ground a metal spar forming said second connecting element 5, so that after casting said second element of low wall 2, a first portion of said spar is covered by said second wall element 2 while a second portion of said spar emerges from said second element of low wall 2, in the longitudinal extension of the latter, as illustrated in FIG. 12. As explained above, the second connecting element 5, advantageously formed by said spar, comprises a vertical through hole 11 positioned in said second portion of the spar. Said operation of depositing the metal spar on the ground is advantageously carried out so as to align said vertical through hole 11 with the holes formed by the third and fourth rings put in place with the reinforcement cage. Once the reinforcement cage has been installed and the metal spar placed on the ground with preferably said first portion of the spar placed under the reinforcement cage, a formwork is put in place in the continuity of said portion of low wall 3A already present, in view to proceed with the casting in place of the second wall element 2. The formwork is then closed, then concrete is poured within the formwork, in order to cast said second wall element 2 in place in the continuity of the portion of the wall 3A already present. After stripping, the sub-assembly illustrated in FIG. 12 is obtained, which is in the form of the second reinforced concrete wall element 2, arranged in the extension and continuity of the wall portion 3A already present, with a second spar portion, forming the second connecting element 5, which emerges from the second wall element 2 in the longitudinal extension of the latter, the orifice 11 provided in the spar being aligned vertically with the orifices of the third and fourth rings forming the third connecting element 8. The spar forming the second connecting element 5 is sealed in the concrete forming the second wall element 2. In order to reinforce the connection between the second wall element 2 and the spar on the one hand, as well as between the second wall element 2, the second connecting element 5 and the ground, a stake 90 is inserted vertically into said holes of the third connecting element 8 (third and fourth metal rings ues) and the second connecting element 5, so as to cross the latter and be firmly pressed into the ground. The installation of this metal pile 90 also makes it possible to guarantee the orientation of the second low wall element 2.

Advantageously, said prefabricated block preferably forming said first concrete wall element 1 comprises, on its underside intended to rest on and against the ground, a recess 110 of a shape complementary to that of said spar forming the second connecting element 5, said operation of laying said prefabricated block on the ground being carried out in such a way that the second portion of the spar which emerges from said second wall element 2 is partially housed in said recess 110 in order to be covered in part by said prefabricated block, as shown in Figure 14.

The method according to the invention also comprises, after the operation of depositing said prefabricated block on the spar portion emerging from the second wall element 2, a step of mutual connection of said first and second wall elements 1, 2. This step of mutual connection includes an operation of supplying a first connector 6 designed to attach between them said first and second connecting elements 4, 5. The first connector 6 is advantageously constituted by the metal rod with threaded tip 61 described in detail in what precedes in relation to the connection device according to the invention.

Said mutual connection step also includes an operation of adapting the position of the first connector 6 relative to the second connecting element 5 in said longitudinal direction D, using an adaptation means 7 allowing a plurality of relative positions possible of the first connector 6 and of the second connecting element 5 in the longitudinal direction D, in order to place said first connector 6 and second connecting element 5 in one of said possible relative positions. For example, as explained in detail in the foregoing, the spar comprises a horizontal panel 50, as well as an oblong slot 70 formed through the thickness of said panel 50 to form said adaptation means 7. The operation of adaptation of the position of the first connector 6 relative to the second connecting element 5 consists for example in placing the rod with a threaded end 61 and the spar in a relative position in which the distal end passes through the oblong slot 70. To this end, the operation of adapting the position of the first connector 6 relative to the second connecting element 5 advantageously comprises an operation of positioning said prefabricated block on the second portion of the spar which emerges from said second low wall element 2 so as to vertically align the axis orifices delimited by the first and second rings with a zone of said oblong slot 70. In the event (not shown) where the adaptation operation is carried out work in the context of a first installation of the first low wall element 1 (and not a reinstallation of the first low wall element 1 after dismantling), the adaptation operation is advantageously implemented by the user so that said zone of the oblong slot 70 corresponds substantially to the middle of the oblong slot 70, in order to thus make it possible to benefit, in the event of disassembly followed by possible reassembly, from an adaptation stroke forwards and rear corresponding respectively to half the length of the oblong slot 70. Once the operation of adapting the position of the first connector 6 relative to the second connecting element 5 has been carried out, the metal rod advantageously forming the first connector 6 is threaded in the first and second metal rings, so that its distal tip 61 crosses the oblong slot 70, for example in the middle of the latter as explained previously.

The connection step then includes an operation of locking the first connector 6 using a locking means 6A designed to immobilize at least in said longitudinal direction D said first connector 6 and second connecting element 5 in each of said positions relative possible, said locking operation thus making it possible to immobilize at least in said longitudinal direction D said first connector 6 and second connecting element 5 in said relative position in which they are placed at the end of said adaptation operation. Advantageously, as explained in detail in the foregoing in relation to the connection device according to the invention, said locking means 61 comprises on the one hand a nut 60A arranged under the horizontal panel 50 in line with the oblong slot 70 and on the other hand a thread 610 carried by said distal end piece 61 and intended to cooperate with the nut 60A, said locking operation consisting in screwing the rod (and more precisely the distal end piece 61) of the latter into the nut 60A to immobilize at least in the longitudinal direction D the rod and the spar. FIG. 15 illustrates the result of the locking operation, the adaptation operation having been carried out to place the stem and the spar in a relative position in which the distal tip passes through the oblong lumen towards the front end 71 of the latter. At the end of the locking operation, the first and second wall elements 1, 2 are thus firmly connected to each other, without the possibility of relative movement, in particular in the longitudinal direction D.

Finally, in order to ensure continuity between the first and second wall elements 1, 2 thus connected and immobilized relative to each other in the longitudinal direction D, and to fill the empty space corresponding to the spacing mutual E, the method advantageously comprises a cowling step, during which both said first and second wall elements 1, 2 are capped at least partially with a cowl 12, so that said cowl 12 extends straddling said first and second wall elements 1, 2, to ensure continuity between them (see Figure 16). In order to consolidate the connection of the first and second wall elements 1, 2, and prevent any untimely movement of the cover 12, in particular in the event of impact with a vehicle, said cover 12 is attached, during the rollover step, to both to the first and to the second wall element 1, 2, for example by means of screws 13, 14 as explained in detail in the foregoing.

A continuous and safe safety barrier 3 is thus obtained, capable of benefiting from the advantages linked to the implementation of elements cast in place on the one hand and of prefabricated elements on the other hand, while allowing dismantling and easy reassembly of the prefabricated elements thanks to the adaptation means 7 and to the conjugate locking means 6A.

Claims (25)

Device for connecting a first and a second wall element (1, 2) made of concrete at a distance from each other and which are intended to form part of the same safety barrier (3) for a road traffic, said safety barrier (3) being intended to extend along said lane in a longitudinal direction (D), said connecting device comprising at least a first connecting element (4) intended to be secured to the first wall element (1), a second connecting element (5) intended to be secured to the second wall element (2) and a first connector (6) designed to attach said first and second connecting elements (4, 5) to each other ), said connecting device being characterized in that it also comprises means (7) for adapting the position of the first connector (6) relative to the second connecting element (5) in said longitudinal direction (D), said adaptation means (7) allowing a plurality of positions possible relative ons of the first connector (6) and the second connecting element (5) along said longitudinal direction (D), said first connector (6) being provided with a locking means (6A) designed to immobilize at least along said longitudinal direction (D) said first connector (6) and second connecting element (5) in each of said possible relative positions. Connection device according to Claim 1, characterized in that the first connecting element (4) forms at least one orifice, while the said first connector (6) comprises a metal rod whose section is adjusted to that of the said orifice, orifice in which the metal rod is intended to be threaded vertically, so as to establish a sliding connection or sliding pivot with a vertical axis between said metal rod and said first connecting element (4). Connection device according to the preceding claim, characterized in that said second connecting element (5) comprises a horizontal panel (50), said adaptation means (7) for its part comprising an oblong opening (70) made through the thickness of said panel (50), said metal rod extending longitudinally between a manually operable operating head (60) and an opposite distal tip (61) intended to pass through the oblong lumen (70), said locking means (6A ) comprising on the one hand a nut (60A) arranged under the horizontal panel (50) in line with the oblong slot (70) and on the other hand a thread (610) carried by said distal end piece (61) and intended to cooperate with the nut (60A). Connection device according to Claim 2 or 3, characterized in that the said first connecting element (4) comprises at least a first metal ring anchored to one end of the said first low wall element (1), and preferably a second metal ring anchored to said end and coaxial with said first metal ring, said first and second rings being stepped. Connection device according to one of the preceding claims, characterized in that it comprises a third connecting element (8) intended to be anchored to one end of the second wall element (2), as well as a second connector (9) designed to attach said second and third connecting elements (5, 8) to each other. Connection device according to the preceding claim, characterized in that the said second connector (9) comprises a metal stake (90) while the third connecting element (8) forms at least one orifice whose section is adjusted to that of the metal stake ( 90), said second connecting element (5) comprising a vertical through hole (11) whose section is adjusted to that of the metal pile (90), the latter being designed to be threaded vertically into said holes of the third connecting element ( 8) and the second connecting element (5) and to be driven into the ground. Connection device according to the preceding claim, characterized in that said third connecting element (8) comprises at least a third metal ring anchored to said end of said second wall element (2), and preferably a fourth metal ring anchored to said end and coaxial with said third metal ring, said third and fourth rings being stepped. Connection device according to one of Claims 1 to 7, characterized in that the said second connecting element (5) comprises at least one metal spar extending longitudinally between a first end (5A) intended to be placed under the first wall (1), and a second end (5B) intended to be placed under the second wall element (2). Connection device according to Claims 3 and 8, characterized in that the said spar comprises an upper wall formed by the said horizontal panel (50), two lateral wings (51, 52) which extend on each side of the said horizontal panel from the edges sides of the latter, as well as a lower wall (55) arranged under, at a distance from, and parallel to, the upper wall, the space delimited between the upper (50) and lower (55) walls and the side wings forming a housing for said nut (60A). Connection device according to Claim 9, characterized in that the said nut (60A) is equipped with a guide means (600) allowing the nut (60A) to slide in the said receiving housing in the longitudinal direction (D), but forbidding it to pivot. Connection device according to one of Claims 1 to 10, characterized in that it comprises a cover (12) intended to cover at least partially both the said first and second wall elements (1, 2), so as to straddle the latter to ensure continuity between them, said connecting device also comprising fixing means (13, 14) for attaching said cover (12) both to the first and to the second wall element (1 , 2). Connection device according to the preceding claim, characterized in that the said fixing means (13, 14) ensure removable fixing of the cover (12) to the first and second wall elements (1, 2). Connection device according to one of Claims 11 or 12, characterized in that the said cover (12) has a U-shaped section with a core (12A) intended to be opposite and above the respective vertices of the said first and second wall elements (1, 2) and two side flanges (12B, 12C) which extend from each side of said web (12A) and are intended to extend substantially to the ground. Safety barrier (3) for road traffic lane, said safety barrier (3) being intended to extend along said lane in a longitudinal direction (D), and comprising a first and a second low wall element (1 , 2) in concrete spaced from each other, said barrier (3) being characterized in that it comprises a connection device according to any one of the preceding claims, said first connecting element being integral with the first wall element, while said second connecting element is integral with the second wall element, the first connector attaching between them said first and second connecting elements. Safety barrier (3) according to the preceding claim, characterized in that the said first wall element (1) is prefabricated and placed on the ground while the second wall element (2) is cast in place. Safety barrier (3) according to the preceding claim, characterized in that said first low wall element (1) has a section with a substantially constant outline, while said second low wall element (2) has a section whose outline varies along said second wall element (2), the latter having, in a first end zone (2A) facing the first wall element (1), a section whose outline is substantially identical to that of the section of the first wall element low wall (1). Safety barrier (3) according to Claim 15 or 16, characterized in that it comprises:
- a first portion of low wall (3A) cast in place,
- a second wall portion (3B) formed by a row of prefabricated wall elements (1, 10, 20) attached one after the other, said first wall element (1) forming part of said row and being placed at one end of said queue,
- a transition portion (3C) cast in place between said first and second portions (3A, 3B), in the continuity of the first portion of low wall (3A) and ending at a distance from said second portion of low wall (3B), said transition portion (3C) forming said second wall element (2). Method of making a safety barrier (3) for a road traffic lane, said safety barrier (3) being intended to extend along said lane in a longitudinal direction, said method comprising:
- a step of producing or supplying a first concrete wall element (1) of which is fixed, or made fixed, a first connecting element (4), said first wall element (1) being intended to form part of said safety barrier (3),
- a step of making or supplying a second concrete wall element (2) of which is integral, or made integral, a second connecting element (5), said second wall element (2) being intended to form part of said safety barrier (3), said first and second concrete wall elements (1, 2) being arranged at a distance from each other,
- a step of mutual connection of said first and second concrete wall elements (1, 2) including:
- an operation of supplying a first connector (6) designed to attach said first and second connecting elements (4, 5) to each other,
- an operation of adapting the position of the first connector (6) relative to the second connecting element (5) in said longitudinal direction (D), using an adaptation means (7) allowing a plurality of possible relative positions of the first connector and of the second connecting element in said longitudinal direction (D), in order to place said first connector (6) and second connecting element (5) in one of said possible relative positions,
- a locking operation of said first connector (6) using a locking means (6A) designed to immobilize at least in said longitudinal direction (D) said first connector (6) and second connecting element (5) in each of said possible relative positions, said locking operation making it possible to immobilize at least in said longitudinal direction (D) said first connector (6) and second connecting element (5) in said relative position in which said first connector ( 6) and second connecting element (5) at the end of said adaptation operation. Method according to Claim 18, characterized in that the said first concrete wall element (1) is in the form of a prefabricated block, the said step of producing or supplying the first wall element (1) comprising an operation of depositing on the floor of said prefabricated block. Method according to Claim 18 or 19, characterized in that the said step of producing or supplying the said second wall element (2) in concrete comprises an operation of casting in place of the said second wall element (2) in the continuity of a portion wall (3A) already present and itself obtained by a casting-in-place process. Method according to claim 20, characterized in that the first wall element has a section with a substantially constant outline, while the said second wall element has a section whose outline varies along the said second wall element to pass:
- a first outline located at one end (2B) of said second low wall element (2), end (2B) which is butted to said wall portion (3A) already present, which low wall portion (3A) has a section of substantially constant contour,
- to a second contour located at the other end (2A) of said second low wall element (2), other end (2A) which is free and arranged opposite and at a distance from said first low wall element (1),
said first contour being substantially identical to said contour of the section of said wall portion (3A), while said second contour is substantially identical to that of the section of the first wall element (1). Method according to Claim 20 or 21, characterized in that it comprises, prior to the said operation of casting in place of the said second wall element (2), an operation of depositing on the ground a metal spar forming the said second connecting element (5), so that after casting said second wall element (2) a first portion of the spar is covered by said second wall element (2) while a second portion of the spar emerges from said second wall element (2 ) in the longitudinal extension of the latter. Method according to Claims 19 and 22, characterized in that the said prefabricated block comprises, on its lower face intended to rest on and against the ground, a recess (110) of a shape complementary to that of the said beam, the said operation of depositing the said block on the ground prefabricated being conducted so that the second portion is partially housed in said recess (110) in order to be covered in part by said prefabricated block. Method according to Claim 23, characterized in that the said spar comprises a horizontal panel (50), as well as an oblong opening (70) made through the thickness of the said panel (50) to form the said adaptation means (7), said first connector (6) comprising a metal rod extending longitudinally between a manually operable operating head (60) and an opposite distal tip (61), said locking means (6A) comprising on the one hand a nut (60A) disposed under the horizontal panel (50) in line with the oblong slot (70) and on the other hand a thread (610) carried by said distal end piece (61) and intended to cooperate with the nut (60A), said operation of adaptation of the position of the first connector (6) relative to the second connecting element (5) consisting in arranging the rod and the spar in a relative position in which the distal tip passes through the oblong slot (70), said locking operation consisting of screwing the rod into the nut (60A) to immobilize at least in the longitudinal direction (D) the rod and the spar. Method according to one of Claims 18 to 24, characterized in that it comprises a capping step during which both the said first and second wall elements (1, 2) are capped at least partially with a cap (12 ), so that said cover (12) straddles said first and second wall elements (1, 2) to ensure continuity between them, and said cover (12) is attached both to the first and to the second wall element (1, 2).