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DE-202026101269-U1 - Component of a bridge substructure

DE202026101269U1DE 202026101269 U1DE202026101269 U1DE 202026101269U1DE-202026101269-U1

Abstract

Structural element (2) of a bridge substructure such as an abutment wall or a pier slab, with a vertically oriented wall section (4) for receiving, in particular, vertical loads of a bridge superstructure (B), wherein the wall section (4) is formed by at least one vertically oriented and reinforced precast wall panel (6) with a precast concrete section (10) and an in-situ concrete supplement (8) arranged directly adjacent to the precast concrete section (10) of the precast wall panel (6), characterized in that the precast wall panel (6) has shear connection elements (12) extending from the precast concrete section (10) into the in-situ concrete supplement (8), via which the precast wall panel (6) and the in-situ concrete supplement (8) are connected to each other in a shear-resistant manner.

Assignees

  • ECHTERHOFF EXPRESSBRUECKEN GMBH

Dates

Publication Date
20260513
Application Date
20260306
Priority Date
20250912

Claims (10)

  1. Structural element (2) of a bridge substructure such as an abutment wall or a pier slab, with a vertically oriented wall section (4) for receiving, in particular, vertical loads of a bridge superstructure (B), wherein the wall section (4) is formed by at least one vertically oriented and reinforced precast wall panel (6) with a precast concrete section (10) and an in-situ concrete supplement (8) arranged directly adjacent to the precast concrete section (10) of the precast wall panel (6), characterized in that the precast wall panel (6) has shear connection elements (12) extending from the precast concrete section (10) into the in-situ concrete supplement (8), via which the precast wall panel (6) and the in-situ concrete supplement (8) are connected to each other in a shear-resistant manner.
  2. Component according to Claim 1 , characterized in that the precast wall panel (6) has a part of the statically required reinforcement of the wall section (4).
  3. Component according to one of the preceding claims, characterized in that several shear connection elements (12) are arranged on each horizontal plane, wherein at least one horizontal reinforcement (14) is arranged on each of the shear connection elements (12) arranged in a plane.
  4. Building element according to one of the preceding claims, characterized in that the building element (2) has a base slab (16) constructed in situ and reinforced.
  5. Component according to Claim 4 , characterized in that the precast wall panel (6) has connecting reinforcement elements (22) projecting downwards from the precast concrete section (10) into the base plate (16).
  6. Component according to Claim 4 or Claim 5 , characterized in that the precast wall panel (6) has support pins (20) arranged in the base plate (16).
  7. Component according to Claim 6 , characterized in that the support punches (20) form recess openings between them, wherein at least part of the statically required reinforcement of the base plate (16) is arranged in the recess openings.
  8. Component according to one of the Claims 4 until 7 , characterized in that the building element (2) has a deep foundation (18) connected to the base plate (16).
  9. Building element according to one of the preceding claims, characterized in that the building element (2) has two or more precast wall panels (6) arranged side by side on the same in-situ concrete supplement.
  10. Building element according to one of the preceding claims, characterized in that the building element (2) comprises at least a second vertically oriented and reinforced precast wall panel (6) with shear connection elements (12) which is arranged on the side of the cast-in-place concrete addition (8) opposite the first precast wall panel (6) and is connected to the cast-in-place concrete addition (8) in a shear-resistant manner via the shear connection elements (12).

Description

The present invention relates to a structural element of a bridge substructure according to the preamble of claim 1. Structural elements of a bridge substructure, such as an abutment wall or a pier slab, are known, which have a vertically oriented wall section for bearing, in particular, vertical loads from a bridge superstructure constructed of cast-in-place concrete. To simplify formwork during the construction of the wall section in cast-in-place concrete, it is also known to design formwork elements as permanent formwork. For this purpose, one or more precast concrete elements are placed on the front and/or back of the wall section as formwork elements. These precast concrete elements are designed as precast wall panels. Precast wall panels are preferably rectangular and panel-shaped. These precast concrete elements have a height and width that are significantly greater than their depth. After the wall section has been poured in place, the precast wall panels remain attached to the corresponding building element as permanent formwork. This eliminates the need for demolding work. The precast wall panels are regularly reinforced to give them the necessary stability for transport from a precast concrete plant to the building element's location. The structural element of a bridge substructure thus comprises a wall section that includes at least one vertically oriented and reinforced precast wall panel and a cast-in-place concrete infill, with the precast wall panel forming formwork for the cast-in-place concrete infill together with a precast concrete section of the precast wall panel. The precast wall panel is located at the front and/or back of the wall section. The front of the wall section is a side whose height and width are significantly greater than the depth of the wall section and are perpendicular to the front. A back of the wall section is located opposite the front. Typically, the front and back of the wall section are parallel to each other. A structural element of a bridge substructure with a vertically oriented wall section for absorbing, in particular, vertical loads of a bridge superstructure is made of DE 20 2019 100 831 U1 known. The structural element is designed here as a bridge abutment with an abutment wall. The object of the present invention is to improve such a component in such a way that it can be manufactured with fewer resources. According to the invention, this problem is solved by the precast wall panel having shear connection elements that extend from the precast concrete section of the vertically oriented precast wall panel into the cast-in-place concrete infill. The precast wall panel and the cast-in-place concrete infill are shear-resistantly connected to each other via these shear connection elements. In particular, the shear connection elements extend horizontally from the precast concrete section into the cast-in-place concrete infill. Through such shear connection elements, which connect the cast-in-place concrete supplement and the precast wall panel in a shear-resistant manner, the material of the precast wall panel can be statically activated to absorb vertical loads of a bridge superstructure. With the existing structural elements, it is necessary to design the cast-in-place concrete infill to bear the entire load. The precast wall panel of the structural element contributes only marginally to the load-bearing capacity of the wall section through its contact with the cast-in-place concrete infill and is therefore disregarded. Its primary function is to provide formwork for the cast-in-place concrete infill of the wall section. In contrast, in the structural element according to the invention, the precast wall panel is shear-resistantly connected to the cast-in-place concrete infill via shear connection elements. This activates the precast wall panel for load transfer in the vertical direction. The concrete and the reinforcement of the precast concrete section of the precast wall panel thus contribute to the structural stability of the structural element, particularly the wall section. The cast-in-place concrete infill can be constructed with a reduced depth compared to previously known structural elements. This saves concrete and reinforcement materials such as reinforcing steel. Such structural elements can be erected more cost-effectively and with fewer resources. Typical material thicknesses of precast wall panels for use as permanent formwork for cast-in-place concrete supplementation are in the range of 20 cm to 25 cm in the finished concrete section. The wall section of a building element regularly exhibits depths in the range of 1.2 m. up to 2.6 m. Due to the static activation of the precast wall panels to absorb loads, particularly vertical ones, the wall section can be constructed with a wall thickness reduced by a maximum of the depth of the precast wall panel compared to the wall thickness of previously known building elements. When using precast wall p