Prefabricated bridge type gantry track foundation and construction method thereof

Abstract

The present application belongs to the technical field of engineering construction, and particularly relates to a fabricated bridge-type gantry rail foundation and a construction method thereof. The fabricated bridge-type gantry rail foundation comprises a plurality of column-type retaining walls, the top plates of the column-type retaining walls are located on the same plane, so that the column-type retaining walls on the center line of each gantry rail integrally form a gantry rail support pier, a gantry rail support beam is arranged on the top of the gantry rail support pier, the gantry rail support beam is formed by splicing a plurality of prefabricated plates, and a gantry rail is fixed on the gantry rail support beam. The construction method of the fabricated bridge-type gantry rail foundation comprises column-type retaining wall foundation installation, gantry rail support beam prefabrication, gantry rail support beam hoisting, gantry rail installation and fabricated bridge-type gantry rail foundation commissioning. The present application improves resource utilization efficiency, construction efficiency and gantry crane walking safety, and reduces labor cost and environmental pollution.

Description

Technical Field

[0001] This invention belongs to the field of engineering construction technology and provides a prefabricated bridge-type gantry track foundation and its construction method that improves resource utilization efficiency, construction efficiency, gantry crane travel safety, reduces labor costs and environmental pollution. Background Technology

[0002] Constructing highways in mountainous areas inevitably requires site selection and site planning for prefabrication yards. Due to the complex terrain, undulating topography, steep slopes, and winding valleys, the landscape is intricately varied. This often limits the planning and construction of prefabrication yards due to the significant longitudinal slopes of the road sections.

[0003] Currently, to effectively address the issue of large longitudinal slopes in beam yards, many domestic construction sites employ a stepped beam yard design. The longitudinal slope of the gantry crane's traveling foundation is typically set at 1%, with foundations raised for areas with significant elevation differences. However, when elevation differences are too large or the beam yard's longitudinal length is excessive, continuing to use foundation-raising methods will significantly increase construction costs and extend the beam yard's construction time. During beam yard construction, when the beam yard is built on a roadbed with a large longitudinal slope, the excessive slope reduces the safety of the gantry crane's movement. Furthermore, when the beam yard connects to bridge abutments at its front and rear ends, the backfilling and leveling process typically restricts the installation of the bridge erecting machine at the abutment, resulting in a low gantry crane lifting height.

[0004] In summary, traditional gantry crane traveling foundations result in high labor costs, low resource utilization efficiency, low gantry crane traveling safety, low construction efficiency, and serious environmental pollution. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a prefabricated bridge-type gantry rail foundation that improves resource utilization efficiency, construction efficiency, safety of gantry crane movement, reduces labor costs, and reduces environmental pollution.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a prefabricated bridge-type gantry track foundation, wherein: multiple column-type retaining walls are set on the center lines of two gantry tracks designed by measurement and layout, and the top surfaces of the column-type retaining walls are located on the same plane, so that the multiple column-type retaining walls on the center lines of each gantry track integrally form a gantry track support pier. A gantry track support beam is set on the top of the gantry track support pier. The gantry track support beam is spliced ​​from multiple prefabricated slabs, and the gantry track is fixed on the gantry track support beam.

[0008] The precast slab includes a concrete slab body, with two rows of gantry rail mounting bolts pre-embedded in the transverse direction of the concrete slab body. At each end of the concrete slab body, there is a toothed interlocking structure, which includes an outwardly protruding male connector and an inwardly recessed female connector.

[0009] The two toothed interlocking structures at the connection of two adjacent precast slabs have a smaller outer diameter of the male connector of the toothed interlocking structure on one precast slab than the inner diameter of the female connector of the toothed interlocking structure on the other precast slab, so that a buffer gap is formed after the two toothed interlocking structures at the connection of two adjacent precast slabs interlock with each other.

[0010] The pressure plate is fixed to the top surface of the concrete slab by the nut on the top of the gantry rail mounting bolts, which is threaded onto the top surface of the concrete slab. The pressure plate presses the gantry rail firmly against the top surface of the concrete slab.

[0011] The purpose of this invention is to provide a construction method for a prefabricated bridge-type gantry track foundation that improves resource utilization efficiency, construction efficiency, safety of gantry crane movement, reduces labor costs, and reduces environmental pollution.

[0012] To achieve the above objectives, the present invention provides the following technical solution:

[0013] A construction method for a prefabricated bridge-type gantry track foundation includes the following steps:

[0014] ① Installation of column retaining wall foundation,

[0015] The roadbed of the lower step construction section of the stepped beam yard was leveled. The positions of the column retaining wall foundations were accurately marked every 4m by measuring and setting out the center lines of the two gantry tracks. The elevation of each column retaining wall was calculated according to the longitudinal slope of the original gantry track foundation based on the measured and set-out elevation coordinates, and the column retaining walls were constructed.

[0016] ② Prefabrication of the gantry track support beams

[0017] The gantry track support beam is composed of multiple precast slabs spliced ​​together. The precast slab includes a concrete slab body. Two rows of gantry track mounting bolts are pre-embedded in the transverse direction of the concrete slab body. A toothed interlocking structure is provided at each end of the concrete slab body. The toothed interlocking structure includes an outwardly protruding male plug and an inwardly recessed female plug.

[0018] The two toothed interlocking structures at the connection of two adjacent precast slabs have a smaller outer diameter of the male connector of the toothed interlocking structure on one precast slab than the inner diameter of the female connector of the toothed interlocking structure on the other precast slab, so that a buffer gap is formed after the two toothed interlocking structures at the connection of two adjacent precast slabs interlock with each other.

[0019] ③ Hoisting of the gantry track support beams

[0020] The first step is to use a crane to lift a precast slab and position it at the center of the top surface of the two column retaining walls located at the foremost position on the center line of the first gantry track.

[0021] The second step involves using a crane to lift the next precast slab to the center of the top surface of the column retaining wall near the end of the previous precast slab, and then positioning it so that the next precast slab and the previous precast slab are engaged by a two-tooth interlocking structure, so that the top surfaces of the two precast slabs are tightly fitted together and the assembly is completed.

[0022] The third step is to repeat the second step above to complete the hoisting of the gantry track support beam on the first gantry track centerline of the two gantry track centerlines.

[0023] The fourth step is to repeat the first to third steps above to complete the hoisting of the gantry track support beam on the second gantry track centerline of the two gantry track centerlines.

[0024] ④ Install the gantry track.

[0025] The pressure plate is fixed to the top surface of the concrete slab by the nut at the top of the gantry rail mounting bolts connected by threads. The pressure plate presses the gantry rail tightly onto the top surface of the concrete slab to form a prefabricated bridge-type gantry rail foundation.

[0026] ⑤ Trial operation of prefabricated bridge-type gantry track foundation.

[0027] The prefabricated bridge-type gantry track foundation was tested using static and dynamic load tests with a gantry crane. Deformation and displacement data of the prefabricated bridge-type gantry track foundation were measured and detected using a level and total station to ensure the safety of the construction process. Any severely damaged parts were replaced in a timely manner.

[0028] The beneficial effects of the structural and method schemes described in this invention are: improved resource utilization efficiency, improved construction efficiency, improved safety of gantry crane movement, reduced labor costs, and reduced environmental pollution.

[0029] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the gantry track in this invention;

[0033] Figure 3 This is a schematic diagram of the structure of the precast slab in this invention;

[0034] Figure 4 This is a schematic diagram of the structure at the connection between the two prefabricated panels of the present invention;

[0035] Figure 5 This is a top view of the structure of the top of the column retaining wall of the present invention;

[0036] Figure 6 This is a schematic diagram of the structure at the connection between the gantry track and the gantry track support beam of the present invention;

[0037] Figure 7 This is a structural schematic diagram from the main viewing direction when the present invention is in use;

[0038] Figure 8 This is a schematic diagram of the structure from a side view when the present invention is in use.

[0039] Reference numerals: 1. Column retaining wall; 2. Gantry track support beam; 3. Precast slab; 4. Gantry track; 5. Pressure plate; 6. Protective steel plate; 7. Anti-vibration block; 8. Buffer gap; 9. Gantry crane device; 301. Concrete slab; 302. Gantry track mounting bolt; 303. Toothed interlocking structure; 3031. Male plug joint; 3032. Female plug joint. Detailed Implementation

[0040] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0041] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual photographs, and should not be construed as limiting this patent. To better illustrate the embodiments of the invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0042] like Figure 1-6 As shown, the present invention discloses a prefabricated bridge-type gantry track foundation, wherein: multiple column-type retaining walls 1 are set on the center lines of two gantry tracks designed by measurement and layout, and the top surfaces of the column-type retaining walls 1 are located on the same plane, so that the multiple column-type retaining walls 1 on the center lines of each gantry track integrally form a gantry track support pier. A gantry track support beam 2 is set on the top of the gantry track support pier. The gantry track support beam 2 is spliced ​​from multiple prefabricated slabs 3, and a gantry track 4 is fixed on the gantry track support beam 2.

[0043] The precast slab 3 includes a concrete slab body 301. Two rows of gantry rail mounting bolts 302 are pre-embedded in the transverse direction of the concrete slab body 301. A toothed interlocking structure 303 is provided at each end of the concrete slab body 301. The toothed interlocking structure 303 includes an outwardly protruding male plug part 3031 and an inwardly recessed female plug part 3032.

[0044] At the connection between two adjacent precast slabs 3, the two toothed interlocking structures 303 have a smaller outer diameter of the male insertion portion 3031 on one of the precast slabs 3 than the inner diameter of the female insertion portion 3032 on the other precast slab 3. This results in a buffer gap 8 formed when the two toothed interlocking structures 303 at the connection between the two adjacent precast slabs 3 interlock. This buffer gap 8 ensures that the precast slabs 3 can be reused multiple times, reducing the wear rate.

[0045] The pressure plate 5 is fixed to the top surface of the concrete slab 301 by the nut at the top of the gantry rail mounting bolt 302 connected by threads. The pressure plate 5 presses the gantry rail 4 tightly onto the top surface of the concrete slab 301. In this embodiment, the construction of the column retaining wall 1 first involves leveling the roadbed of the lower step construction section of the stepped beam yard. By measuring and setting out the center line of the gantry rail, the position of the foundation of the column retaining wall 1 is accurately marked every 4m. Based on the measured elevation coordinates and the longitudinal slope of the original gantry rail foundation, the elevation of each column retaining wall 1 is calculated and constructed. After the column retaining wall 1 is constructed, multiple precast slabs 3 are spliced ​​together to form the gantry rail support beam 2. Then, the gantry rail 4 is installed on the gantry rail support beam 2, completing the construction of the entire prefabricated bridge-type gantry rail foundation.

[0046] To ensure that the overall bending and tensile strength of the gantry track support beam 2 meets the normal working requirements of the gantry crane, in the above embodiment, preferably, the interior of the concrete slab 301 is provided with reinforcing ribs arranged in a crisscross pattern.

[0047] To avoid severe wear and loose connections at the joints of adjacent concrete slabs 301 due to repeated rolling by the gantry crane, in the above embodiment, preferably, the distance between the top end of the toothed interlocking structure 303 on the concrete slab 301 and the top surface of the concrete slab 301 is equal to the distance between the bottom end of the toothed interlocking structure 303 on the concrete slab 301 and the bottom surface of the concrete slab 301.

[0048] To reduce repeated frictional damage between the concrete slab 301 and the column retaining wall 1, in the above embodiment, preferably, a protective steel plate 6 is provided between the bottom surface of the concrete slab 301 and the top surface of the column retaining wall 1. In specific implementation, the protective steel plate 6 is a 2cm thick Q235 steel plate.

[0049] To prevent the gantry track support beam 2 from falling due to large lateral displacement under force, in the above embodiment, preferably, anti-vibration blocks 7 are provided on both sides of the top of the column retaining wall 1.

[0050] See appendix Figures 1 to 8 A construction method for a prefabricated bridge-type gantry track foundation, characterized by the following steps:

[0051] ① Installation of column retaining wall foundation,

[0052] Level the roadbed of the lower step construction section of the stepped beam yard, and accurately mark the position of the foundation construction of column retaining wall 1 every 4m by measuring and setting out the center lines of the two gantry tracks. Calculate the elevation of each column retaining wall 1 according to the longitudinal slope of the original gantry track foundation based on the measured and set-out elevation coordinates, and construct column retaining wall 1.

[0053] ② Prefabrication of the gantry track support beam 2

[0054] The gantry track support beam 2 is assembled from multiple precast slabs 3. The precast slab 3 includes a concrete slab body 301. Two rows of gantry track mounting bolts 302 are pre-embedded in the transverse direction of the concrete slab body 301. A toothed interlocking structure 303 is provided at each end of the concrete slab body 301. The toothed interlocking structure 303 includes an outwardly protruding male plug part 3031 and an inwardly recessed female plug part 3032.

[0055] The two toothed interlocking structures 303 at the connection of two adjacent precast slabs 3 have a smaller outer diameter of the male insertion part 3031 on one of the precast slabs 3 than the inner diameter of the female insertion part 3032 on the other precast slab 3, so that a buffer gap 8 is formed when the two toothed interlocking structures 303 at the connection of two adjacent precast slabs 3 interlock with each other.

[0056] ③ Hoisting of the gantry track support beam 2

[0057] The first step is to use a crane to lift a precast slab 3 and position it at the center of the top surface of the two column retaining walls 1 located at the foremost position on the center line of the first gantry track of the two gantry track center lines.

[0058] The second step is to use a crane to lift the next precast slab 3 to the center of the top surface of the column retaining wall 1 near the end of the previous precast slab 3 and position it there. The next precast slab 3 and the previous precast slab 3 are engaged by two tooth-shaped interlocking structures 303, so that the top surfaces of the two precast slabs 3 are tightly fitted and the assembly is completed.

[0059] The third sub-step involves repeating the second sub-step above to complete the hoisting of the gantry track support beam 2 on the first gantry track centerline of the two gantry track centerlines.

[0060] Fourth step: Repeat the first to third steps above to complete the hoisting of the gantry track support beam 2 on the second gantry track centerline of the two gantry track centerlines;

[0061] ④ Install gantry track 4.

[0062] The pressure plate 5 is fixed to the top surface of the concrete slab 301 by the nut at the top of the gantry rail mounting bolt 302 connected by threads. The pressure plate 5 presses the gantry rail 4 onto the top surface of the concrete slab 301 to form a prefabricated bridge-type gantry rail foundation.

[0063] ⑤ Trial operation of prefabricated bridge-type gantry track foundation.

[0064] The prefabricated bridge-type gantry rail foundation was tested using static and dynamic load tests with a gantry crane device 9. Deformation and displacement data of the prefabricated bridge-type gantry rail foundation were measured and detected using a level and total station to ensure the safety of the construction process. Any severely damaged parts were promptly replaced. Using a gantry crane device for static and dynamic load tests on the prefabricated bridge-type gantry rail foundation is a standard and current technique, and will not be described in detail here. Measuring and detecting the deformation and displacement data of the prefabricated bridge-type gantry rail foundation using a level and total station is also a standard technical method.

[0065] In the above method embodiments, in order to ensure that the overall bending and tensile strength of the gantry track support beam 2 meets the normal working requirements of the gantry crane, preferably, the concrete slab 301 is provided with reinforcing ribs arranged in a crisscross pattern inside.

[0066] In the above method embodiments, in order to reduce repeated friction damage between the concrete slab 301 and the column retaining wall 1, preferably, a protective steel plate 6 is provided between the bottom surface of the concrete slab 301 and the top surface of the column retaining wall 1.

[0067] In the above method embodiment, in order to prevent the gantry track support beam 2 from falling due to large lateral displacement under the action of force, preferably, anti-vibration blocks 7 are provided on both sides of the top of the column retaining wall 1.

[0068] In the above embodiments, all components are commercially available products. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A prefabricated bridge-type gantry track foundation, characterized in that: Multiple column retaining walls (1) are set on the center lines of the two gantry tracks designed by measurement and layout. The top surface of the column retaining walls (1) is located on the same plane, so that the multiple column retaining walls (1) on the center lines of each gantry track form a gantry track support pier. A gantry track support beam (2) is set on the top of the gantry track support pier. The gantry track support beam (2) is spliced ​​from multiple precast slabs (3). A gantry track (4) is fixed on the gantry track support beam (2). The precast slab (3) includes a concrete slab body (301), with two rows of gantry rail mounting bolts (302) pre-embedded in the transverse direction of the concrete slab body (301). At each end of the concrete slab body (301), a toothed interlocking structure (303) is provided. The toothed interlocking structure (303) includes an outwardly protruding male plug part (3031) and an inwardly recessed female plug part (3032). The two toothed interlocking structures (303) at the connection of two adjacent precast slabs (3) have a smaller outer diameter of the male insertion part (3031) of the toothed interlocking structure (303) on one of the precast slabs (3) than the inner diameter of the female insertion part (3032) of the toothed interlocking structure (303) on the other precast slab (3), so that a buffer gap (8) is formed after the two toothed interlocking structures (303) at the connection of two adjacent precast slabs (3) interlock with each other. The pressure plate (5) is fixed to the top surface of the concrete slab (301) by the nut at the top of the gantry rail mounting bolt (302) by the threaded connection. The pressure plate (5) presses the gantry rail (4) against the top surface of the concrete slab (301).

2. The prefabricated bridge-type gantry rail foundation according to claim 1, characterized in that: The interior of the concrete slab (301) is provided with crisscrossing reinforcing bars.

3. The prefabricated bridge-type gantry track foundation according to claim 2, characterized in that: The distance between the top end of the toothed interlocking structure (303) on the concrete slab (301) and the top surface of the concrete slab (301) is equal to the distance between the bottom end of the toothed interlocking structure (303) on the concrete slab (301) and the bottom surface of the concrete slab (301).

4. The prefabricated bridge-type gantry rail foundation according to claim 2, characterized in that: A protective steel plate (6) is provided between the bottom surface of the concrete slab (301) and the top surface of the column retaining wall (1).

5. The prefabricated bridge-type gantry rail foundation according to claim 1, characterized in that: The top two sides of the column retaining wall (1) are provided with shock-absorbing blocks (7).

6. The construction method for the prefabricated bridge-type gantry track foundation according to claim 1, characterized in that: Includes the following steps, ① Installation of column retaining wall foundation, Level the roadbed of the lower step construction section of the stepped beam yard, and accurately mark the position of the foundation construction of the column retaining wall (1) every 4m by measuring and setting out the center lines of the two gantry tracks. Calculate the elevation of each column retaining wall (1) according to the longitudinal slope of the original gantry track foundation based on the measured elevation coordinates, and construct the column retaining wall (1). ② Prefabrication of the gantry track support beam (2), The gantry track support beam (2) is spliced ​​from multiple precast slabs (3). The precast slab (3) includes a concrete slab body (301). Two rows of gantry track mounting bolts (302) are pre-embedded in the transverse direction of the concrete slab body (301). A toothed interlocking structure (303) is provided at each end of the concrete slab body (301). The toothed interlocking structure (303) includes an outwardly protruding male plug part (3031) and an inwardly recessed female plug part (3032). The two toothed interlocking structures (303) at the connection of two adjacent precast slabs (3) have a smaller outer diameter of the male insertion part (3031) of the toothed interlocking structure (303) on one of the precast slabs (3) than the inner diameter of the female insertion part (3032) of the toothed interlocking structure (303) on the other precast slab (3), so that a buffer gap (8) is formed after the two toothed interlocking structures (303) at the connection of two adjacent precast slabs (3) interlock with each other. ③ The hoisting of the gantry track support beam (2), The first step is to use a crane to lift a precast slab (3) and position it at the center of the top surface of the two column retaining walls (1) located at the foremost position on the center line of the first gantry track of the two gantry track center lines. The second step is to use a crane to lift the next precast slab (3) to the center of the top surface of the column retaining wall (1) near the end of the previous precast slab (3), and place it there. The next precast slab (3) and the previous precast slab (3) are engaged by two toothed interlocking structures (303), so that the top surfaces of the two precast slabs (3) are tightly fitted and assembled. The third sub-step is to repeat the second sub-step above and complete the hoisting of the gantry track support beam (2) on the first gantry track centerline of the two gantry track centerlines; Fourth step: Repeat the first to third steps above to complete the hoisting of the gantry track support beam (2) on the second gantry track centerline of the two gantry track centerlines; ④ Install the gantry track (4). The pressure plate (5) is fixed to the top surface of the concrete slab (301) by the nut at the top of the gantry rail mounting bolt (302) by the threaded connection. The pressure plate (5) presses the gantry rail (4) onto the top surface of the concrete slab (301) to form a prefabricated bridge-type gantry rail foundation. ⑤ Trial operation of prefabricated bridge-type gantry track foundation. The gantry crane device (9) is used to conduct static and dynamic load tests on the prefabricated bridge-type gantry track foundation. The deformation and displacement data of the prefabricated bridge-type gantry track foundation are measured and detected by level and total station to ensure the safety of the construction process. If serious damage is found, it is replaced in time.

7. The construction method for the prefabricated bridge-type gantry track foundation according to claim 6, characterized in that: The interior of the concrete slab (301) is provided with crisscrossing reinforcing bars.

8. The construction method for the prefabricated bridge-type gantry track foundation according to claim 6, characterized in that: A protective steel plate (6) is provided between the bottom surface of the concrete slab (301) and the top surface of the column retaining wall (1).

9. The construction method for the prefabricated bridge-type gantry track foundation according to claim 6, characterized in that: The top two sides of the column retaining wall (1) are provided with shock-absorbing blocks (7).

Images