A new type of prefabricated beam yard

Abstract

The present invention relates to a novel prefabricated beam yard layout, which belongs to the technical field of prefabricated beam yard construction; the main line tunnel portal is formed with a beam yard concrete floor by excavating and backfilling along the portal position, the beam yard concrete floor is provided with a mountain-facing retaining wall along the mountain side of the beam yard, the beam yard concrete floor is provided with a backfill area retaining wall and a beam yard backfill area retaining wall along the outer side of the backfill area, the beam yard concrete floor is provided with a gantry crane for lifting equipment along the horizontal and vertical positions, and a prefabricated T-beam pedestal is arranged at a position to which the gantry crane can move; the present invention forms the beam yard concrete floor by excavating and backfilling, and adopts a combination of vertical and horizontal layout. On the premise of ensuring the number of T-beam prefabricated pedestals, the height of the retaining wall of the beam yard construction and the amount of mountain excavation engineering can be effectively reduced, and has the advantages of strong applicability and saving beam yard construction costs. The gantry crane can facilitate the transportation of various equipment, and the retaining wall ensures the stability of the beam yard concrete floor and the gantry crane.

Description

Technical Field

[0001] The invention relates to a novel prefabricated beam yard layout, belonging to the technical field of prefabricated beam yard construction. Background Art

[0002] In recent years, my country's highway construction has achieved rapid development, and the standardized construction of highways has also made great progress. Currently, a large portion of highways under construction and planning in western China are located in mountainous terrain. Precast T-beam technology is particularly widely used in bridge construction within the current highway industry. Its advantages include easy quality assurance, strong applicability, and fast construction speed. The construction of precast beam yards is crucial to the entire highway construction process. Since most highways in western China are located in mountainous areas, the terrain generally restricts the site selection of precast beam yards. This results in insufficient effective precast beam yard area, a limited number of beam pedestals, and insufficient beam strength, which delays construction. Therefore, the development of a new precast beam yard layout, taking into account the characteristics of mountainous terrain, is particularly critical. Summary of the Invention

[0003] In order to overcome the problems existing in the background technology, the present invention forms a concrete floor of the beam yard by excavation and backfilling, and adopts a combination of vertical and horizontal layout. It can effectively reduce the height of the retaining wall and the amount of mountain excavation in the beam yard while ensuring the number of T-beam prefabricated pedestals. It has the advantages of strong applicability and saving the cost of beam yard construction. The installation of a gantry crane can facilitate the transportation of various equipment, and the installation of the retaining wall ensures the stability of the concrete floor of the beam yard and the gantry crane.

[0004] In order to overcome the problems existing in the background technology and solve the above problems, the present invention is implemented through the following technical solutions:

[0005] The novel prefabricated beam yard layout includes a beam yard concrete floor, a retaining wall on the mountain side, a retaining wall in the fill area, a retaining wall in the beam yard backfill area, a gantry crane, and a prefabricated T-beam pedestal. The main line tunnel portal is formed with a beam yard concrete floor by excavating and backfilling along the portal position. The beam yard concrete floor is provided with a retaining wall on the mountain side along the beam yard concrete floor. The beam yard concrete floor is provided with a retaining wall in the fill area and a retaining wall in the beam yard backfill area along the outside of the backfill area. Gantry cranes for lifting equipment are provided along the horizontal and vertical positions of the beam yard concrete floor. Prefabricated T-beam pedestals are arranged at positions where the gantry cranes can be moved. The gantry crane is cantilevered along one side of the retaining wall in the fill area to reduce the amount of mountain excavation and backfill in the fill area.

[0006] Preferably, the concrete floor of the beam yard is a ""-shaped structure that intersects vertically and horizontally, including a horizontal floor and a vertical floor. The horizontal floor and the vertical floor are respectively provided with a beam yard backfill area retaining wall and a fill area retaining wall along the outside of the backfill area.

[0007] Preferably, a gantry crane track cantilever support retaining wall is provided along the side of the retaining wall in the filling area close to the main line tunnel portal, and a gantry crane track cantilever support steel frame is provided on the other side to ensure support for the gantry crane.

[0008] Preferably, a steel trestle is provided on the side of the transverse floor close to the longitudinal floor to connect to the main line bridge cap beam.

[0009] Preferably, a main channel and a secondary channel are provided between the prefabricated T-beam pedestals.

[0010] Preferably, the concrete floor of the beam yard is installed by digging a pit to install the gantry crane track foundation, and the gantry crane track is installed on the gantry crane track foundation, and the elevation of the gantry crane track top is the same as the floor elevation.

[0011] Preferably, the horizontal arrangement area and the vertical arrangement area are connected through a main channel to ensure the material transportation and T-beam exit transportation requirements, and the main channel corresponds to the main line tunnel portal.

[0012] Preferably, drainage ditches are provided on the concrete floor of the beam yard between the prefabricated T-beam pedestals.

[0013] The beneficial effects of the present invention are:

[0014] The present invention forms a concrete floor of the beam yard by excavation and backfilling, and adopts a combination of vertical and horizontal layout. It can effectively reduce the height of the retaining wall for beam yard construction and the amount of mountain excavation while ensuring the number of T-beam prefabricated pedestals. It has the advantages of strong applicability and saving beam yard construction costs. The installation of a gantry crane can facilitate the transportation of various equipment, and the installation of the retaining wall ensures the stability of the concrete floor of the beam yard and the gantry crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the planar structure of the present invention;

[0016] Figure 2 This is a cross-sectional view of the AA portion of the present invention;

[0017] Figure 3 It is a partial enlarged schematic diagram of the present invention;

[0018] Figure 4 It is a cross-sectional view of the BB portion of the present invention;

[0019] Figure 5 It is a schematic cross-sectional view of the gantry crane track of the present invention.

[0020] The numbers in the figure are: 1-edge line of retaining wall on the mountain side of the beam yard, 2-center line of gantry crane track, 3-prefabricated T-beam pedestal, 4-contour line of steel bar processing plant, 5-site on the mountain side, 6-main channel, 7-main line tunnel portal, 8-secondary channel, 9-gantry crane track cantilever support retaining wall, 10-retaining wall in the backfill area of ​​the beam yard, 11-gantry crane track cantilever support steel frame, 12-main line bridge cap beam, 13-steel trestle 13, 14-transported finished T-beam, 15-gantry crane track, 16-retaining wall in the backfill area, 17-gantry crane track foundation, 18-T-beam, 19-original slope line of the mountain, 20-concrete floor of the beam yard, 21-drainage ditch, 22-retaining wall on the mountain side, 23-gantry crane, 24-slope line of mountain excavation. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and beneficial effects of the present invention more clear, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding by technicians.

[0022] like Figure 1-4 As shown, the new precast beam yard layout includes a beam yard concrete floor 20, a retaining wall 22 on the mountain side, a retaining wall 16 in the fill area, a retaining wall 10 in the beam yard backfill area, a gantry crane 23, and a precast T-beam pedestal 3. The main line tunnel portal 7 is formed with a beam yard concrete floor 20 by excavating and backfilling along the portal position. The purpose is to solve the problem that the construction of precast beam yards for expressways in mountainous areas is restricted by the terrain and leads to insufficient effective area. The beam yard concrete floor 20 is provided with a retaining wall 22 on the mountain side along the beam yard, and the beam yard concrete floor 20 is provided with a retaining wall 16 in the fill area and a retaining wall 10 in the beam yard backfill area along the outside of the backfill area. The beam yard concrete floor 20 is provided with a gantry crane 23 for lifting equipment along the horizontal and vertical positions, and a precast T-beam pedestal 3 is arranged at a position where the gantry crane 23 can be moved. The gantry crane 23 is cantilevered along one side of the retaining wall 16 in the fill area to reduce the amount of mountain excavation and backfill in the fill area.

[0023] The method of half-filling and half-excavating the original mountain to form the site and occupying the two-span bridge for backfilling or directly backfilling the original terrain is adopted to form a ""-shaped precast beam yard layout that combines horizontal and vertical directions. The beam yard concrete floor 20 is a ""-shaped structure that intersects vertically and horizontally, which meets the restrictions of mountainous terrain and landforms, can greatly save the amount of slope excavation and support engineering, reduce the height of retaining walls, increase the effective area of ​​the precast beam yard and the number of precast T-beam pedestals 3, and reduce costs. It includes a horizontal floor and a vertical floor. The horizontal floor and the vertical floor are respectively provided with a beam yard backfill area retaining wall 10 and a filling area retaining wall 16 along the outside of the backfill area.

[0024] The horizontal floor is mainly a fill area, which covers the main line bridge pile foundation and backfills it to form a site. This method can reduce the original mountain excavation volume and increase the prefabricated beam site area. The horizontal floor is close to the side of the main line tunnel portal 7. While ensuring the number of beam-making pedestals, it greatly reduces the mountain excavation volume and reduces the safety risk of slope excavation. At the same time, it reduces the height of the concrete retaining wall in the half-excavation and half-filling area, saving construction costs in many aspects while ensuring the strength of beam making.

[0025] Away from the mainline tunnel portal 7 is a vertical beam yard, primarily a semi-cut and semi-fill area. This area is created by excavating the original mountain and then backfilling it with a retaining wall. Depending on the actual terrain, a comprehensive beam yard layout, primarily horizontal or vertical, can be selected.

[0026] The backfill area retaining wall 16 is provided with a gantry crane track cantilever support retaining wall 9 along one side close to the main line tunnel portal 7, and a gantry crane track cantilever support steel frame 11 is provided on the other side to ensure support for the gantry crane 23.

[0027] A steel trestle 13 is provided on the side of the transverse floor close to the longitudinal floor to connect to the main line bridge cap beam 12. The steel trestle 13 is provided between the main line bridge cap beam 12 and the retaining wall 10 of the beam yard backfill area to meet the main line vehicle traffic requirements. After the subsequent beam yard beam manufacturing task is completed, the buried pile foundation position is excavated and the main bridge construction can be carried out.

[0028] A main channel 6 and a secondary channel 8 are provided between the prefabricated T-beam pedestals 3. In the specific implementation process, three channels are provided on the horizontal floor, with position number 6 being the main channel 6 and position number 8 being the secondary channel 8. Among them, position number 5 and position number 8 on the far right (position number 5 is site 5 on the mountain side, which does not affect the secondary channel 8) point to positions that serve as material channels and pouring channels for the beam yard. The main channel 6 is responsible for the transportation of T-beams 18 out of the horizontal and vertical layout areas and the transportation of materials. The main channel 6 is located in the horizontal and vertical layout areas, corresponding to the main line tunnel portal 7. The secondary channel 8 meets the requirements for vehicles passing through the main line bridge to enter and exit the beam yard.

[0029] According to the actual construction situation and construction schedule of the beam yard, if the horizontal layout area of ​​the beam yard is used for beam making first, the vertical layout area of ​​the beam yard does not need T-beam 18 transportation, then steel pedestals can be reasonably added at the main channel 6 position of the horizontal layout area of ​​the beam yard, and the number of beam making pedestals can be increased to improve the strength of beam making, but space for material transportation vehicles must be reserved. After the construction of prefabricated T-beam 18 in the vertical area of ​​the beam yard begins, the steel pedestals can be removed and the main channel 6 for beam transportation can be restored.

[0030] The beam yard concrete floor 20 is installed with a gantry crane track foundation 17 by digging a pit, and a gantry crane track 15 is installed on the gantry crane track foundation 17. The top elevation of the gantry crane track 15 is the same as the floor elevation, which can form a hidden arrangement to meet the vehicle traffic requirements.

[0031] A drainage ditch 21 is provided on the concrete floor 20 of the beam yard between the prefabricated T-beam pedestals 3 to meet drainage requirements.

[0032] The present invention forms a concrete floor of the beam yard by excavation and backfilling, and adopts a combination of vertical and horizontal layout. It can effectively reduce the height of the retaining wall for beam yard construction and the amount of mountain excavation while ensuring the number of T-beam prefabricated pedestals. It has the advantages of strong applicability and saving beam yard construction costs. The installation of a gantry crane can facilitate the transportation of various equipment, and the installation of the retaining wall ensures the stability of the concrete floor of the beam yard and the gantry crane.

[0033] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A new type of precast beam yard layout, characterized by: include: The beam yard concrete floor is formed at the main tunnel portal by excavation and backfilling. The beam yard concrete floor is a "-shaped structure with vertical and horizontal intersections, including a horizontal floor and a longitudinal floor; The retaining wall on the mountain side is set up along the mountain side of the beam yard; The retaining wall in the filling area and the retaining wall in the beam yard backfill area are set along the outer side of the backfill area; The gantry crane is arranged in a horizontal and vertical position, and its gantry crane track is fixed to one side of the fill area retaining wall in a cantilever manner. The cantilevered gantry crane track is connected to the fill area retaining wall through the track cantilever support retaining wall and the track cantilever support steel frame; Prefabricated T-beam pedestal, arranged in a movable position of the gantry crane; The transverse floor is connected to the main bridge cap beam through a steel trestle, and the half-excavated and half-filled area of ​​the longitudinal floor is connected to the original slope line of the mountain through a retaining wall on the mountain side.

2. The novel precast beam yard layout according to claim 1 is characterized in that: The concrete floor of the beam yard is a ""-shaped structure that intersects vertically and horizontally, including a horizontal floor and a vertical floor. The horizontal floor and the vertical floor are respectively provided with a beam yard backfill area retaining wall and a fill area retaining wall along the outside of the backfill area.

3. The novel precast beam yard arrangement according to claim 1 or 2, characterized in that: The retaining wall of the filling area is provided with a gantry crane track cantilever support retaining wall on one side close to the main line tunnel portal, and a gantry crane track cantilever support steel frame is provided on the other side to ensure support for the gantry crane.

4. The novel precast beam yard arrangement according to claim 3 is characterized in that: A steel trestle is provided on one side of the transverse floor close to the longitudinal floor to connect with the main line bridge cap beam.

5. The novel precast beam yard arrangement according to claim 4 is characterized in that: A main channel and a secondary channel are provided between the prefabricated T-beam pedestals.

6. The novel precast beam yard arrangement according to claim 5 is characterized in that: The concrete floor of the beam yard is installed by digging a pit to install the gantry crane track foundation, and the gantry crane track is installed on the gantry crane track foundation. The top elevation of the gantry crane track is the same as the floor elevation.

7. The novel precast beam yard arrangement according to claim 6 is characterized in that: The transverse floor and the longitudinal floor are connected by a main channel to ensure the material transportation and T-beam exit transportation requirements, and the main channel corresponds to the main line tunnel portal.

8. The novel precast beam yard arrangement according to claim 7 is characterized in that: Drainage ditches are provided on the concrete floor of the beam yard between the prefabricated T-beam pedestals.

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