Vehicle restraint and / or noise protection system with prefabricated foundation

Abstract

A method is proposed for the installation of a vehicle restraint module (10) and / or noise protection module for road shoulders with minor traffic restrictions caused by the construction site, in which at least one at least partially prefabricated vehicle restraint module (10) and / or noise protection module, comprising a base module (1) and a vehicle restraint and / or noise protection system (7), is installed, wherein a precast concrete strip is provided as the base module (1), a foundation pit for receiving the base module (1) is provided and / or excavated, and the base module (1) is placed into the foundation pit provided for this purpose, and wherein the vehicle restraint and / or noise protection system (7) is attached to the base module (1) before or after the base module (1) is placed into the foundation pit.

Description

[0001] The invention relates to a method for assembling a vehicle restraint module and / or noise protection module according to the preamble of claim 1 and to a vehicle restraint module and / or noise protection module for roadside verges according to the preamble of claim 7.

[0002] A method for installing vehicle restraint systems is known from the prior art. This method involves excavating foundation pits at the roadside, typically for individual post foundations, and filling these with concrete on site (in-situ concrete). The restraint systems are then installed in the still-liquid concrete, allowing the concrete to partially harden around the restraint system. Another option is to install the restraint system only after the concrete has completely hardened, by drilling holes in the concrete into which the restraint system is then anchored. The installation of such a restraint system takes place on a construction site in the area of ​​the roadside, which can sometimes result in a significant restriction of the roadway width. In most cases, however, concreting is dispensed with; individual posts for anchoring a restraint system are driven directly into the ground.

[0003] Furthermore, methods are known from JP 2004 084184 A and DE 101 31 519 A in which prefabricated base parts are first connected one after the other and guard rails or wall elements are mounted on them.

[0004] The object of the invention is therefore to propose a method for assembling a vehicle restraint module and / or noise protection module for roadside strips or a vehicle restraint module or noise protection module with which roadway restrictions or traffic obstructions caused by construction sites can be reduced.

[0005] This object is achieved, based on a method for assembling a vehicle restraint module and / or noise protection module for roadside strips or a vehicle restraint module and / or noise protection module of the type mentioned in the introduction, by the characterizing features of claim 1 and claim 7, respectively. Advantageous embodiments and further developments of the invention are possible through the measures mentioned in the subclaims.

[0006] Accordingly, a method according to the invention is characterized in that at least one prefabricated vehicle restraint module and / or noise protection module, comprising a base module and a vehicle restraint system or

[0007] A noise protection element is installed, with a precast concrete strip being provided as the base module. First, a foundation pit is usually prepared or excavated at the edge of the roadway on the construction site to accommodate the base module. The base module is placed into this foundation pit. The vehicle restraint system or noise protection element can be attached to the base module before or after the base module is placed in the foundation pit.

[0008] Such vehicle restraint and / or noise protection systems are installed at the side of the road and, on the one hand, form a visually perceptible geometric boundary of the roadway or lane for road users. On the other hand, they also serve a safety purpose because, in the event of an accident, they are intended to ensure that a vehicle does not leave the roadway or lane it is in, if possible, and to better shield the surrounding area from the resulting road noise. This precautionary measure serves to protect the driver involved in an accident, because the vehicle in question could, for example, leave the roadway on a bridge and fall. But it also serves, for example, to protect people on sidewalks parallel to the roadway or similar.Such vehicle restraint and / or noise protection systems are not only installed when new roads are constructed, but are also replaced during road reconstruction work or renewed in the event of damage, including after an accident, or during maintenance.

[0009] These vehicle restraint systems are typically designed as guardrails. In addition to applications on the shoulder, they can also be used in the median strip. Traffic signs (posts, signs, traffic lights, etc.) can also be attached to them.

[0010] Another possible application of the invention is the installation of noise protection elements intended to reduce the noise generated by vehicles, for example in nearby residential areas.

[0011] The base module, designed as a precast concrete strip, is prefabricated and fully cured. This means the concrete drying time does not interfere with the construction site's curbside time, resulting in significantly faster assembly and, overall, a much shorter construction time than with previous methods. A further advantage is that the conditions for drying and curing the precast element can be optimally adjusted in the factory with regard to the required time and quality, something that is not easily possible on a construction site.

[0012] Compared to the current state of the art and the processes commonly used thereafter, the invention makes it possible to significantly reduce the duration of a construction site. Complete drying and curing of the concrete alone takes at least 28 days. This time is significantly reduced, even negligible, when using a precast concrete component.

[0013] A construction site usually hinders traffic flow in various ways: On the one hand, the prescribed speed limit is reduced in construction zones. On the other hand, construction sites often involve narrowing the roadway because part of the roadway needs to be worked on or space is needed for work, storing construction materials, or maneuvering construction vehicles. In some cases, complete closures and traffic diversions are even necessary if the space required for the construction site no longer allows for safe passage.

[0014] The interest in reducing the duration of a construction site exists not only for the road users involved who have to drive through or avoid the site. Construction sites also always pose a certain degree of risk, not only for the road users themselves but also for the construction workers themselves. They work in close proximity to moving traffic and, despite the temporary reinforcements erected in the construction zone, can only be adequately protected. Furthermore, construction sites generally pose an increased risk of accidents because the roadway is narrowed, speed must sometimes be reduced quickly, vehicles must reposition themselves, and drivers are required to exercise increased attention.

[0015] Furthermore, the long construction site blocks the construction company's capacity in terms of personnel and the provision of machinery and construction materials. This also results in a cost advantage with a variant according to the invention if the construction duration can be shortened.

[0016] Thanks to the shorter construction time, more road sections can be equipped with vehicle restraint and / or noise protection systems in the same amount of time compared to previous methods. This reduces traffic congestion, as fewer lane closures result, resulting in fewer detours. Furthermore, road workers and their required equipment, such as vehicles and construction machinery, are tied to individual construction sites for shorter periods, allowing companies to accept more contracts in the same amount of time. This increases the company's revenue.

[0017] In addition, safety for road users is increased because existing roads can be retrofitted with restraint systems more quickly.

[0018] The vehicle restraint and / or noise protection system can, in principle, be attached to the base module after it has been placed in the foundation pit or even before it has been installed. This depends, among other things, on whether a specific shape and size of prefabricated base modules can be specified.

[0019] On the other hand, a prefabricated component that includes not only the base module but also the already assembled or attached restraint system also offers advantages, as it can be transported compactly and used on the construction site without any further loss of time.

[0020] For installation, a pit is first dug at the side of the road, as is common practice. Depending on the soil conditions, this pit is typically dug to a depth of approximately 80 cm to 110 cm. According to the invention, the base module is inserted into this foundation pit as a prefabricated component, so that the upper edge of the base module is at ground level or at least at a similar height to the road surface. However, the vehicle restraint and / or noise protection system should always be installed at a corresponding height above the road surface, which facilitates its function of protecting vehicles and their occupants that leave the roadway, as well as other road users from vehicles that leave the roadway.

[0021] This allows the method according to the invention and the vehicle restraint and / or noise protection module according to the invention to be excellently adapted to individual construction conditions. Sometimes, posts cannot be driven into the ground because, for example, underground cables or other obstacles in the ground prevent the driving of posts. For secure, stable anchoring, the driven posts must be driven sufficiently deep into the ground. In such cases, other methods must be found to install a sufficiently stable restraint system, which are usually time-consuming. The use of the proposed prefabricated base module offers an advantageous alternative, allowing for rapid installation and a high degree of stability.

[0022] Advantageously, at least two prefabricated vehicle restraint and / or noise protection modules are installed in series, one after the other, in the foundation pit. This measure allows for large sections to provide seamless protection for road users. The vehicle restraint and / or noise protection modules can be designed in such a way that the vehicle restraint and / or noise protection systems of the individual vehicle restraint and / or noise protection modules are flush with one another or even overlap, eliminating gaps in between where a vehicle cannot be restrained. It is also conceivable for the vehicle restraint and / or noise protection systems to be connected to one another, for example, by screwing or riveting. A connection via an additional connecting piece is also possible.Overall, such connections can increase stability because, in the event of a force transfer, such as a vehicle impact, the forces can be distributed across more than one module. It can also prove advantageous for the anchorage to run continuously, continuously, or largely continuously along the edge of the roadway through the precast foundation.

[0023] Preferably, the at least two prefabricated vehicle restraint and / or noise protection modules are fixed to one another, in particular connected with an anchor, preferably screwed and / or glued. An additional connection of two or more vehicle restraint and / or noise protection modules ensures that the protective effect is maintained over a long period and is even increased through force distribution. Thus, the impulse that occurs during an accident does not have to be compensated and absorbed by just one vehicle restraint and / or noise protection module, but can be distributed across multiple vehicle restraint and / or noise protection modules. This makes it possible to achieve additional stability for the vehicle restraint and / or noise protection modules. In this way, the safety of road users can be guaranteed even when installed in difficult subsurface conditions and even when exposed to high forces, such as in accidents involving trucks.

[0024] Depending on the design variant, the individual vehicle restraint and / or noise protection modules can also be connected to one another by gluing or screwing with anchors or other prefabricated connectors.

[0025] In one embodiment of the invention, the base module and the vehicle restraint and / or noise protection system are preferably connected with at least one adhesive anchor. This creates a stable, secure connection between the base module and the vehicle restraint and / or noise protection system that can withstand the forces acting in the event of an impact. For this purpose, adhesive anchors attached to the vehicle restraint and / or noise protection system are countersunk into holes in the base module and glued in place. Typically, these holes are not pre-drilled in the factory, but are individually drilled on site. These holes are preferably drilled vertically. However, other connection techniques are also conceivable.

[0026] In a further embodiment, the at least one prefabricated vehicle restraint module and / or noise protection module is fixed in the foundation pit using concrete. The vehicle restraint module or noise protection module is additionally stabilized by the concrete in the pit. It is conceivable that a relatively thin layer of concrete is applied to the pit floor and to the sides between the base module and the pit edge. It is also conceivable that the gaps between the base module and the pit edge are poured with concrete. Although this additional concrete requires a drying time at the road construction site, it is only formwork using concrete, which requires very little material compared to previous methods due to the relatively thin layer, so that the drying time can still be considerably shorter than with previous methods.

[0027] Preferably, a cuboid-shaped precast concrete element is used, which extends primarily in the longitudinal direction and is particularly designed like a wall. This shape makes it easy to align the restraint systems vertically, allowing them to optimally fulfill their protective function. Furthermore, such a shape makes it easy to align the individual vehicle restraint and / or noise protection modules at the roadside, for example by arranging the corresponding side surfaces next to one another, as well as to connect the vehicle restraint and / or noise protection modules to one another. A wall-like design allows the force acting on the vehicle restraint and / or noise protection system in the event of a motor vehicle impact to be transferred to the ground.

[0028] In addition, transport to the installation site is easy with cuboid-shaped base modules, as their inherent shape allows them to rest securely on the loading area. The dimensions of the base module can vary and be adapted depending on the truck and / or road layout. For straight stretches, it is advisable to use longer vehicle restraint and / or noise protection modules; for curves, it may be more appropriate to use shorter vehicle restraint and / or noise protection modules.

[0029] According to the invention, the at least two base modules are aligned with a guide rail which is inserted into the recesses of adjacent base modules, wherein the adjacent recesses are arranged in alignment.

[0030] According to the invention, the base module has at least one recess in the lower area, on the underside. Advantageously, the recesses are arranged on the base module such that, when two or more base modules are arranged in a row, the recesses merge into one another in alignment, allowing a guide rail to be inserted into the adjacent recesses. The use of a guide rail supports and simplifies the alignment of the individual base modules relative to one another.

[0031] In a further development of the invention, the base module as a prefabricated component can, for example, be cuboid-shaped. If the restraint modules are arranged longitudinally, it may be advisable to also orient the guide rails or the associated recesses or grooves accordingly along the longitudinal direction. A groove into which the guide rail is inserted should be arranged on the underside so that the top side of the prefabricated component is available for the assembly of the restraint system.

[0032] The groove into which, for example, the guide rail is to be inserted can break through the end faces of the base module so that the guide rail can also cross from the groove of one of the base modules into the groove of the adjacent base module and thus enables the adjacent base modules to be aligned with one another.

[0033] The guide rail itself is generally used to align the base modules and not necessarily to fasten them to one another. For this purpose, additional grooves or recesses can be incorporated into the sides of the base module, for example. In one design variant, these recesses can be designed so that they do not run the entire length of the base module. They break through one end but end in the base module. A precast concrete anchor can be screwed to the base module at this end. Two adjacent base modules, in turn, have aligned recesses, so that the anchor can extend from one module to the next and fix both together. In principle, however, a guide rail could also simultaneously function as a fixing connection between the modules.

[0034] On the sides, especially when the recesses are located closer to the top than to the bottom of the base module, the precast concrete anchors are usually easily accessible during assembly, which can further facilitate work on the construction site.

[0035] The recesses for securing and attaching the base modules to each other can be shaped so that a tool (e.g., for screwing) can be easily inserted into them. Screws or bolts can be used for fastening to the inner wall of the recesses. Some anchors, for example, sold under the trade name "HALFEN," can be used to attach the modules to each other.

[0036] To ensure particularly high stability, the base module can incorporate a steel bracing system embedded in the concrete of the precast element. This can be box-shaped, extending through the entire base module cuboid.

[0037] For improved support in the foundation pit or when placed on an existing subsurface, the base module can have a roughened surface on the underside.

[0038] On construction sites, there is often a specification for the maximum weight of delivered parts, because otherwise the vehicles required to lift or move the part would be too large. A guideline value in this case is currently around 6 t. The embodiments according to the invention can therefore also be adapted to such a guideline in terms of their dimensions, for example, by selecting the length of the modules with or without vehicle restraint and / or noise protection systems so that the weight requirements are met. Examples of implementation:

[0039] Embodiments of the invention are illustrated in the drawings and are explained in more detail below, giving further details and advantages.

[0040] In detail: Fig. 1: a schematic representation of a base module for a vehicle restraint and / or noise protection module or for a method for assembling a vehicle restraint and / or noise protection module according to the invention, Fig. 2: two base modules used in series (shown schematically) with matching assembly aids according to the invention, and Fig. 3: a vehicle restraint and / or noise protection module (schematic) with base module and vehicle restraint and / or noise protection system according to the invention.

[0041] Figure 1shows a base module 1 according to the invention, which has a cuboidal basic shape. The base module 1 is designed according to the invention as a prefabricated part, in particular a prefabricated concrete part, in order to be used immediately on the construction site without any long waiting times for the concrete to harden, so that the further construction work can be carried out without delays. The underside is traversed in the longitudinal direction or longitudinal extent L by a groove 2. This groove 2 also breaks through the two opposite end faces 3. If, as in Figure 2If, as shown, two base modules 1 are lined up next to one another, these grooves 2 are aligned. For precise alignment of the base modules 1, a rail can be inserted into the grooves 2, extending from one base module 1 to the adjacent one. The guide rail thus runs through at least two base modules 1. In a method variant according to the invention, it is also possible to first insert and align the guide rail in the excavated foundation pit so that the base modules 1 can be placed on the guide rail and are thus then adjusted.

[0042] The base module is usually at least 10 meters long. This alone ensures a certain degree of anchoring stability. This length also represents a certain compromise: The modules themselves must still be transportable by truck and handled by cranes or other construction vehicles, while also covering a sufficient portion of the construction site.

[0043] On the sides of each base module 1, at the beginning and end in the direction of the longitudinal extension L, recesses 4 are provided, which, however, do not completely extend through the base module cuboid 1, but end with a stop 5. An anchor can be inserted laterally into this and screwed to the inward-facing stop 5. As shown here in Figure 2As can be seen, these recesses 4 run in alignment when the base modules 1 are arranged and aligned in series, so that the anchor engages in the recess 4 of the adjacent base module 1 and connects and fixes the two adjacent base modules 1 together.

[0044] In general, two variants are possible: The base module 1 as a prefabricated component can be brought to the construction site on its own, and only after insertion into the pit is the vehicle restraint and / or noise protection system 7 mounted at the marked locations 6. The manufactured prefabricated component 10 comprises both components of the vehicle restraint and / or noise protection module 10, namely the base module 1 and the pre-assembled vehicle restraint and / or noise protection system 7; the entire vehicle restraint and / or noise protection module 10, as shown by way of example in Figure 3 shown, is inserted into the foundation pit.

[0045] Adhesive anchors for the vehicle restraint and / or noise protection system 7 can be attached to the marked locations 6. The marked locations 5 can be designed as recesses or holes for secure anchoring. Figure 3 Posts 8 have been inserted at locations 6. The posts 8 are connected by a plank 9, which also closes the gaps between the posts 8 and forms a continuous retaining system 7.

[0046] From base module 1 to base module 1, the planks 7 also run in alignment and can be connected to each other to increase stability.

[0047] The base module 1 inserted into the foundation pit can have a top surface, where the mounting points 6 (e.g., for the adhesive anchors) are located, that is flush with the ground surface surrounding the foundation pit. The depth of the pit can also be selected so that the base module protrudes slightly from the pit, for example, to facilitate adjustment to the road surface.

[0048] What all embodiments and further developments of the invention have in common is that they can be used to reduce roadway restrictions or traffic obstructions caused by construction sites by providing a precast concrete strip as the base module. The corresponding method for assembling a vehicle restraint and / or noise protection module for roadside strips proceeds in such a way that at least one vehicle restraint and / or noise protection module, comprising the corresponding base module in the form of a prefabricated part and a vehicle restraint and / or noise protection system, is attached after a foundation pit for receiving the base module has been provided and / or excavated, and the base module is introduced into the foundation pit provided for it, wherein the vehicle restraint and / or noise protection system is generally attached to the base module before or after the base module is inserted into the foundation pit.

[0049] The precast strip also has significant advantages over a conventional post foundation made of cast-in-place concrete for restraint systems, as has been the case up to now, because a higher degree of restraint stability can be achieved in the event of an impact and because the proposed system can be installed continuously and without gaps.

[0050] In a noise protection module according to the invention, instead of a vehicle restraint system 7, corresponding noise protection walls or other sound-damping elements are attached to the base module 1. List of reference symbols:

[0051] 1Base module 2Longitudinal groove for guide rail 3End faces 4Recess for anchor connection between base modules 5Stop 6Mounting points for adhesive anchors 7Vehicle restraint and / or noise protection system 8Restraint post 9Restraint plank 10Vehicle restraint module LLongitudinal extension

Claims

1. Method for installing a vehicle restraint module (10) and / or noise protection module for road shoulders, wherein at least two at least partially prefabricated vehicle restraint modules (10) and / or noise protection modules, each comprising a base module (1) and a vehicle restraint and / or noise protection system (7), are mounted, • wherein a precast concrete strip is provided as the base module (1), • wherein a foundation pit for receiving the base module (1) is provided and / or excavated, and • the base module (1) is introduced into the foundation pit provided therefor, • wherein the vehicle restraint and / or noise protection system (7) is mounted on the base module (1) before or after the base module (1) is introduced into the foundation pit, characterized in that the at least two base modules (1) are oriented with a guide rail inserted into cutouts (2) in adjacent base modules, wherein the adjacent cutouts are arranged in an aligned manner, wherein the cutouts (2) are arranged on the underside of the base module (1).

2. Method for installing a vehicle restraint module (10) and / or noise protection module for road shoulders according to Claim 1, characterized in that at least two prefabricated vehicle restraint modules and / or noise protection modules (10) are introduced into the foundation pit in series with one another.

3. Method for installing a vehicle restraint module (10) and / or noise protection module for road shoulders according to either of the preceding claims, characterized in that the at least two prefabricated vehicle restraint modules (10) and / or noise protection modules are fixed together, in particular connected by an anchor, preferably screwed and / or adhesively bonded together.

4. Method for installing a vehicle restraint module (10) and / or noise protection module for road shoulders according to any of the preceding claims, characterized in that the base module (1) and the vehicle restraint and / or noise protection system (7) are connected by at least one adhesive anchor.

5. Method for installing a vehicle restraint module (10) and / or noise protection module for road shoulders according to any of the preceding claims, characterized in that the at least one prefabricated vehicle restraint module (10) and / or noise protection module is fixed in the foundation pit by means of concrete.

6. Method for installing a vehicle restraint module (10) and / or noise protection module for road shoulders according to any of the preceding claims, characterized in that a substantially cuboidal concrete prefabricated part is used as the base module (1), which extends primarily in a longitudinal direction (L) and is formed in particular in a wall-like manner.

7. Vehicle restraint module (10) and / or noise protection module for road shoulders, comprising a base module (1) and a vehicle restraint and / or noise protection system (7), wherein the vehicle restraint and / or noise protection system (7) is arranged on the base module (1), wherein the base module (1) is in the form of a precast concrete strip, wherein the base module (1) has at least one cutout (2) in the underside, which extends at least substantially in the longitudinal direction (L), wherein the at least one cutout (2) also passes through at least one of the two end sides (3).

8. Vehicle restraint module (10) and / or noise protection module for road shoulders according to Claim 7, characterized in that the base module is substantially cuboidal, which extends primarily in the longitudinal direction (L), is formed in particular in a wall-like manner, and is formed with a top side, the underside, a first end side (3), a second end side (3), a first side and a second side.

9. Vehicle restraint module (10) and / or noise protection module for road shoulders according to either of the preceding Claims 7 and 8, characterized in that the base module (1) has at least one cutout (2, 4) in the first side and / or the second side, which extends substantially in the longitudinal direction (L), wherein the at least one cutout (2, 4) also passes through at least one of the two end sides (3).

10. Vehicle restraint module (10) and / or noise protection module for road shoulders according to any of the preceding Claims 7 to 9, characterized in that the base module (1) has, on at least one of the two sides, in each case a securing cutout (4) for receiving and / or introducing a concrete prefabricated part anchor, which passes in particular through one of the end sides (3).

11. Vehicle restraint module (10) and / or noise protection module for road shoulders according to any of the preceding Claims 7 to 10, characterized in that at least two base modules (1) are arranged in series, which: a. are oriented via a guide rail which has been inserted into adjacent cutouts (2), and / or b. are fastened via concrete prefabricated part anchors which have been introduced into adjacent, aligned securing cutouts (4).

12. Vehicle restraint module (10) and / or noise protection module for road shoulders according to any of the preceding Claims 7 to 11, characterized in that the base module (1) comprises a steel strut.

13. Vehicle restraint module (10) and / or noise protection module for road shoulders according to any of the preceding Claims 7 to 12, characterized in that at least the underside of the base module (1) has a roughened surface.

14. Vehicle restraint module (10) and / or noise protection module for road shoulders according to any of the preceding Claims 7 to 13, characterized in that the base module (1) has a weight of between 5500 kg and 6500 kg, preferably of at most 6000 kg.

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