FI91304C - Bridge elements - Google Patents

Description

91304

BRIDGE ELEMENT

BROELEMENT

The invention relates to a steel-structured bridge element, for example for use in light traffic. The detachable bridge element can be easily moved ready-made.

According to the known method, bridges are usually built of 5 parts on site. Such a construction method is time consuming and the installation method must increase construction costs. It is more advantageous to make the bridge a prefabricated element that is only installed in place. However, the structure of known element bridges is usually complex, or large and expensive means of production are required for their manufacture.

For example, German application 26 52 398 discloses a bridge assembled from large and difficult-to-handle plates. The load-bearing element of the silicon is a housing beam 15 below the cover to which the U-shaped steel plate arches are attached. The side parts of the silia also consist of vertical steel plates on which a horizontal plate web is attached.

The object of the present invention is to provide a more advantageous and simpler bridge element structure than known bridge structures, which can be easily and quickly installed.

The invention is characterized in that the bridge element comprises I-steel beams located on each side of the element 25, located at the top of the bridge element or in its vicinity, that the I-steel beams at the same time form at least part of the bridge element rails

The invention provides a bridge with a structure 2 light and low. The structure of such a bridge element also makes it possible for the bridge to be lifted from the railings during the installation phase. That's why it's easy to move ready to go.

According to a preferred embodiment of the invention, a foot element made of, for example, pressure-impregnated wood is connected to each end of the bridge element. By the choice of the foot element, the bridge element rests on a leveled foundation in the ground, which is, for example, rubble, sand or other soil.

The invention will now be described, by way of example, with reference to the accompanying drawings, in which

Figure 1 shows a bridge element according to the invention.

Fig. 2 shows the bridge element according to Fig. 1 installed in place.

Fig. 3 shows a cross-section of the U-arch structure of the bridge element taken along the line III-III in Fig. 1.

Fig. 4 shows a partial enlargement in section from the end of the bridge element 20 of Fig. 1.

Fig. 5 shows the bridge element according to Fig. 1 from the end as seen.

Figure 1 shows a steel-structured bridge element 10 comprising two I-steel-25 beams 11 with end flanges 16, steel U-arches 12, longitudinal support beams 13 and flat irons on the sides 15. Silica steel structure is connected to the pressure-impregnated planks 14 and pressure elements impregnated with pressure impregnated wood 20 at both ends of the silica.

The load-bearing structure of the bridge element 10 is formed by I-steel beams 11 located at the top of the bridge element, which at the same time form silica railings. The bridge structure is thus made light and low. Attached to the I-steel beams 11 are transverse, steel U-arches 12 connected by longitudinal support beams 13 and side rails 15. The longitudinal support beams 13 support a cover 14 made of pressure-saturated wood.

The length of the bridge element 10 in this embodiment is preferably 9 to 12 meters, but longer elements can also be built as required. The height of the I-steel beam 11 is, for example, 400 mm when the length of the bridge element 10 is less than 12 meters. For bridge elements longer than 12 meters, the height of the Ι-ΙΟ steel beam 11 is 500 mm. The structure of such a bridge element 10 allows the bridge to be lifted from the railings during the installation phase. The steel U-arcs 12 and the longitudinal support beams 13 are square tubes connected by welding. The welds of the bridge element 10 are ποιοι 5 sealed so that no open pipe ends are left.

Fig. 2 shows the steel-structured bridge element 10 of Fig. 1 mounted on its wooden foot elements 20. The foot elements 20 rest on a foundation 18, which 20 may be of crushed stone, sand or other soil. The surface area of the foot elements 20 is then sufficiently large in area, so that only a small surface pressure is applied to the foundation. In this way, small masses of soil are also sufficient to build the foundation. The structure of the wooden foot elements 20 also provides a low ground clearance, so that a separate high ground embankment does not have to be built under the foot elements. The structure of the foot elements 20 is shown in more detail in Figures 4 and 5.

When the bridge element 10 is manufactured and welded to the lower beams of the I-steel beams 11, the thermal expansion of the metal causes the I-steel beams 11 to bend slightly upwards. However, this feature is advantageous for the structure, because after installation, the self-weight of the bridge element 10 again straightens the silica.

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Figure 3 is a cross-sectional view taken of Figure 1. This clearly illustrates the structure of the bridge element 10 according to the invention. The I-steel beams 11 are welded with U-arches 12 made of square cross-section steel pipe 12 and are connected by welding with longitudinal support beams 13. The U-arch 12 is further supported on the sides by flat irons 15. The wooden cover 14 is formed so that the longitudinal support beams Next to 13, wooden longitudinal supports 23 are placed, in which the deck planks 24 are nailed with nails 22. If necessary, it is possible to place cables 17 between the deck planks 24 and the U-arms 12 on the side of the support beam 13.

Figure 4 shows a longitudinal section of the end part of the steel-structured bridge element 10 and the associated wooden foot element 20 resting on a ground-leveled foundation 18, as shown in Figure 2. The 1.5 meter long sensor elements 20 are mounted at both locations of the bridge element 10 around the two outermost U-arcs 12. The wooden longitudinal supports 23 are located on the top 20 of the U-arch 12 next to the support beams 13, as shown in Fig. 3.

Intermediate planks 26 are connected to the wooden longitudinal supports 23 by bolts 21. Furthermore, the deck planks 24 are nailed to the wooden longitudinal supports 23 and the lower planks 25 are nailed to the intermediate planks 26. The sensor elements 20 are thus fixedly connected to the bridge element 10. It is possible to place 12 inside the sensor elements. laterally the cables 17. In order for the foot element 20 to be sealed against the ground at its end as well, the gaps between the intermediate planks 26 and the cover planks 24 are blocked by the plank ends 27. The respective ends 30-30 can also be placed at the opposite end of the foot element 20. This is not shown in Figure 4. Thus, the foot elements alternatively form either an open, ventilated or completely oxygen-free, completely enclosed space at one end to protect the steel structures.

5 91304

Figure 4 also shows the construction of the cover 14 of the bridge element 10. The lid 14 is sealed so that the pressure impregnated lid wires 24 are mounted side by side. Tight planking prevents any road salt that may be applied to the bridge from entering the cracks in the deck structure into the metal parts under the deck.

Figure 5 shows the bridge element 10 and its foot element 20 as seen from the end of the silica. Since the wooden foot elements 20 rest directly on the foundation 18, as shown in Fig. 10 and 2, the pressure-saturated lower planks 25 are mounted side by side. The tight foot structure prevents moisture from the ground from entering the silicon steel structures.

The lower members 25 and spacers 26 are connected to the wooden longitudinal supports 23 by bolts 20 between the U-arch 12 of the bridge element 10. The wooden longitudinal supports 23 are nailed with a wooden cover 14 nailed 22 and the spacers 26 are nailed with lower planks 25. To keep the foot element 20 tightly against the ground at the end, the gaps between the intermediate planks 26 and the kan-20 silk planks 24 are blocked by the plank ends 27.

It will be apparent to those skilled in the art that various embodiments of the invention may vary within the scope of the claims set forth below.

Claims (7)

A steel-structured bridge element (10), for example for light traffic use, characterized in that the bridge element (10) comprises I-steel beams (11) arranged on each side of the element, located at the top of the 5 bridge elements in the vicinity of the I-steel beams (11) at least a part of the railings of the bridge element (10), and that the I-steel beams (11) of the railings form the main load-bearing structure of the bridge element (10). Bridge element (10) according to Claim 1, characterized in that the I-steel beams (11) are connected to one another by transverse steel U-arches (12), that the U-arches (12) are connected to each of the I-steel beams 15 ( 11) on the lower surface, and that longitudinal support beams (13) are connected to the U-arch (12), which carry the wooden cover (14) of the bridge element (10). Bridge element 20 (10) according to Claim 1 or 2, characterized in that a sensor element (20) made of, for example, pressure-impregnated wood is connected to each end of the bridge element (10) and that the bridge element rests on the ground 18 ), which is, for example, 25 gravel, sand or other soil. Bridge element (10) according to Claim 2, characterized in that the wooden cover (14) of the bridge element (10) is formed in such a way that wooden longitudinal supports 30 (23) are arranged next to the longitudinal support beams (13). is attached. Bridge element (10) according to Claim 2, 3 or 4, characterized in that the foot element (20) is mounted 91304 at the end of the bridge element (10) in connection with the two outermost U-arcs (12), and in that the foot element (20) comprises spacers (26). ), plank ends (27) and lower planks (25), which crack a dense, soil moisture-insulating layer between the steel bridge element (10) and the foundation (18) leveled in the ground. Bridge element (10) according to Claim 5, characterized in that the wooden parts (24, 25, 26, 27) of the foot element (20) form a space which protects the steel structures (12, 13) of the foot element and is closed on both sides. Bridge element (10) according to one of Claims 1 to 6, characterized in that the length of the bridge element (10) is most preferably 9 to 12 meters, and that the height of the I-steel beam (11) is 400 mm. t δ