Adjustable bridge deck slab prefabricating pedestal and adjusting method thereof

Abstract

The invention relates to an adjustable bridge deck slab prefabricating pedestal and an adjusting method thereof.The adjustable bridge deck slab prefabricating pedestal comprises two strip-shaped concrete bases arranged in parallel, six bearing beams are erected on the two bases, and the top faces of the two ends of each bearing beam are each welded with a longitudinal track beam in the direction parallel to the corresponding bearing beam; two transverse track beams are erected between the longitudinal track beams at the two ends of the six spandrel girders in the direction perpendicular to the spandrel girders; a bottom die end module is supported on every two longitudinal track beams, and four walking wheels capable of walking along the longitudinal track beams are arranged at the bottom of each bottom die end module; a plurality of bottom die middle modules are arranged on the two transverse track beams, the bottom die middle modules are divided into A types and B types, anchoring block reserved grooves are formed in the A type bottom die middle modules, and four walking wheels capable of walking along the transverse track beams are arranged at the bottom of each bottom die middle module. The number and the positions of the modules in the middle of the A-type bottom die and the B-type bottom die can be adjusted, prefabrication of bridge decks of different types is met, and the construction cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, relates to the prefabrication construction of concrete bridge decks, and particularly relates to an adjustable bridge deck prefabrication pedestal and an adjustment method thereof. Background Art

[0002] A steel-concrete composite beam is a type of bridge formed by laying a concrete bridge deck on a steel beam. This composite structure can effectively utilize the tensile properties of the steel beam and the compressive properties of the concrete. It also has the advantages of easy installation of steel beams, low structural weight, centralized prefabrication of bridge decks, and factory production. It also has good economic efficiency and has been widely used in recent years.

[0003] Concrete bridge decks are generally equipped with prestressed steel strands. During prefabrication, prestressed anchor blocks need to be installed on the bottom surface of the bridge deck. In order to form the anchor blocks at the bottom of the bridge deck, corresponding reserved grooves need to be set on the bottom template of the prefabricated pedestal. Different bridge decks have different numbers and lengths of prestressed strands according to their installation locations and load-bearing capacity requirements. Therefore, the number and position of anchor blocks installed at the bottom are also different, resulting in a variety of types of bridge decks with anchor blocks. Currently, when prefabricating bridge decks with anchor blocks, it is often necessary to set different bottom templates on the pedestal for different types of bridge decks, resulting in long pedestal modification time, large investment in the number of bottom templates, and high construction costs. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned problems and provide an adjustable bridge deck prefabricated pedestal and an adjustment method thereof, so that a variety of bridge decks can be prefabricated using one pedestal, thereby reducing construction costs.

[0005] The present invention provides an adjustable bridge deck prefabricated pedestal, which is characterized by comprising two parallel strip concrete bases, six load-bearing beams are set up on the two bases in a direction perpendicular to the bases, a longitudinal track beam is welded to the top surface of each load-bearing beam at both ends in a direction parallel to the load-bearing beam, a longitudinal track is set up on the top surface of the longitudinal track beam in a direction parallel to the load-bearing beam, two transverse track beams are set up on the six load-bearing beams between the longitudinal track beams at both ends in a direction perpendicular to the load-bearing beam, and transverse track beams are set up on the two transverse track beams in a direction perpendicular to the load-bearing beam; a bottom mold end module is supported on each of the two longitudinal track beams, and each bottom mold The bottom of the end module is provided with 4 running wheels that can run along the longitudinal track, and the side walls of adjacent bottom mold end modules are tightly fitted together; multiple bottom mold middle modules are provided on the two transverse track beams, and the bottom mold middle modules are divided into A-type bottom mold middle modules and B-type bottom mold middle modules, among which the A-type bottom mold middle module is provided with a reserved groove for forming the bottom anchor block of the bridge deck, and the number and spacing of the A-type bottom mold middle modules are set according to the number and spacing of the bottom anchor blocks of the bridge deck, and multiple B-type bottom mold middle modules are provided with multiple width types; the bottom of each bottom mold middle module is provided with 4 running wheels that can run along the transverse track, and the side walls of adjacent bottom mold middle modules are tightly fitted together.

[0006] The method for adjusting the adjustable bridge deck prefabricated pedestal is characterized by comprising the following steps:

[0007] (1) Slide the bottom mold end modules at both ends outward along the longitudinal track for a certain distance, leaving space for the installation of the lifting device for the crane to lift the bottom mold middle module;

[0008] (2) Determine the appropriate number and type of bottom formwork middle modules and their layout on the pedestal based on the bridge deck design drawings;

[0009] (3) The middle modules of the bottom formwork that are not needed for this pouring are lifted off the pedestal, and then the remaining middle modules of the bottom formwork on the pedestal are moved along the transverse track, and each A-type bottom formwork middle module is moved to the appropriate position according to the anchor block spacing designed on the bridge deck;

[0010] (4) Lift the middle module of the B-type bottom mold required for this pouring onto the pedestal and move it to the predetermined position;

[0011] (5) Move the end modules of each bottom mold inward and press them against the middle module of the bottom mold to complete the adjustment of the prefabricated base.

[0012] The present invention divides the bridge deck bottom formwork into multiple modules. By combining different modules, the number and position of the modules with reserved grooves for anchor blocks on the bottom formwork are adjusted to meet the prefabrication of different types of bridge decks, reduce the number of pedestals, and lower construction costs. Each bottom formwork module can be moved by wheels and rails, and the position adjustment is convenient and quick, which is conducive to reducing the use of lifting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is an elevational view of the pedestal of the present invention;

[0014] Figure 2 yes Figure 1 Side view in the middle AA direction;

[0015] Figure 3 yes Figure 1 Side view in the middle BB direction;

[0016] Figure 4 It is a schematic diagram of the layout state of the bottom mold module;

[0017] Figure 5 yes Figure 4 Schematic diagram of the state of the base mold after adjustment. DETAILED DESCRIPTION

[0018] like Figure 1 、 Figure 2 、 Figure 3 As shown, the adjustable bridge deck prefabricated pedestal of the present invention includes two parallel strip concrete bases 1, six load-bearing beams 2 are erected on the two bases 1 in a direction perpendicular to the bases, a longitudinal track beam 3 is welded to the top surface of each end of each load-bearing beam 2 in a direction parallel to the load-bearing beam, and a longitudinal track 4 is provided on the top surface of the longitudinal track beam 3 in a direction parallel to the load-bearing beam; two transverse track beams 5 are erected on the six load-bearing beams between the longitudinal track beams at both ends in a direction perpendicular to the load-bearing beam, and transverse track 6 is provided on the two transverse track beams in a direction perpendicular to the load-bearing beam.

[0019] Every two longitudinal track beams 3 support a bottom mold end module 7, and each bottom mold end module is provided with 4 running wheels 9 that can run along the longitudinal track, and the side walls of adjacent bottom mold end modules are tightly fitted; multiple bottom mold middle modules 8 are supported on two transverse track beams, and the bottom mold middle modules 8 are divided into A-type bottom mold middle modules 81 and B-type bottom mold middle modules 82, wherein the A-type bottom mold middle module 81 is provided with a reserved groove 811 for forming the bottom anchor block of the bridge deck, and the number and spacing of the A-type bottom mold middle modules are set according to the number and spacing of the bottom anchor blocks of the bridge deck, and multiple B-type bottom mold middle modules are provided with multiple width types; each bottom mold middle module 8 is provided with 4 running wheels 9 that can run along the transverse track, and the side walls of adjacent bottom mold middle modules are tightly fitted.

[0020] During the specific implementation of the present invention, the bottom mold is designed and manufactured in blocks according to the design drawings of the bridge deck. Considering that the position of the anchor block at the bottom of the bridge deck relative to the width direction of the bridge deck remains unchanged, the anchor block reserved groove on the bottom mold is set on the middle module of the bottom mold. In one embodiment, the bottom mold end module is divided into 6 blocks, wherein the bottom mold end module 7 at one end has a width of 0.5m, and the bottom mold end module 7 at the other end has a width of 0.75m, and the lengths of the bottom mold end modules at each end are 3m, 1.95m, and 3m respectively; the configuration of the bottom mold middle module 8 should meet the needs of different types of bridge panels, including multiple A-type bottom mold middle modules 81, each with a length of 2.25m and a width of 0.75m; multiple B-type bottom mold middle modules 82, with a length of 2.25m. In order to flexibly adapt to the various different spacings between the A-type bottom mold middle modules, multiple B-type bottom mold middle modules can be set to multiple width types. For example, in this embodiment, the width of the B-type bottom mold middle module can be set to 5 types, namely 0.645m, 0.75m, 1m, 0.5m, and 0.555m. According to the number and spacing of the anchor blocks on different bridge panels, multiple A-type and B-type bottom mold middle modules of different widths can be combined on the pedestal.

[0021] The following is a specific example to illustrate the adjustment method of the above-mentioned adjustable bridge deck prefabrication pedestal. In this embodiment, according to the number and spacing of the anchor blocks at the bottom of the last prefabricated bridge deck, the bottom mold layout is as follows: Figure 4 As shown, the bottom formwork layout of the bridge deck to be prefabricated is as follows Figure 5 As shown, Figure 4 and Figure 5 The spacing of the middle modules 81 of the A-type bottom mold is different. To adapt to the change in the spacing of the middle modules 81 of the A-type bottom mold, the number and model of the middle modules 82 of the B-type bottom mold are also different. Figure 4 The status shown is adjusted to Figure 5 The specific adjustment method is as follows:

[0022] (1) Slide the bottom mold end modules 7 at both ends outward along the longitudinal track for a certain distance, leaving space for the installation of the lifting device for the crane to lift the bottom mold middle module;

[0023] (2) Determine the appropriate number and type of bottom mold middle modules 8 and their layout on the pedestal according to the bridge deck design drawings;

[0024] (3) Lift the B-type bottom form middle module 82 that is not needed for this pouring off the pedestal; then move the remaining bottom form middle modules on the pedestal along the transverse track, and move each A-type bottom form middle module 81 to the appropriate position according to the anchor block spacing designed on the bridge deck;

[0025] (4) The B-type bottom mold middle module 82 required for this pouring is then hoisted onto the pedestal and moved to the predetermined position;

[0026] (5) Move the end modules 7 of each bottom mold inwards and press them against the middle module of the bottom mold. Figure 4 The status shown is adjusted to Figure 5 The status shown completes one prefabricated pedestal adjustment.

Claims

1. An adjustable bridge deck prefabricated pedestal, characterized by: It includes two parallel strip concrete bases, 6 load-bearing beams are set up on the two bases in a direction perpendicular to the bases, and a longitudinal track beam is welded to the top surface of each load-bearing beam in a direction parallel to the load-bearing beam. The top surface of the longitudinal track beam is provided with a longitudinal track in a direction parallel to the load-bearing beam. Two transverse track beams are set up between the longitudinal track beams at both ends of the 6 load-bearing beams in a direction perpendicular to the load-bearing beam, and the two transverse track beams are provided with a transverse track in a direction perpendicular to the load-bearing beam; each two longitudinal track beams support a bottom mold end module, and each bottom mold end module is provided with 4 movable tracks at the bottom. The running wheels that move along the longitudinal track are tightly fitted between the side walls of adjacent bottom form end modules; multiple bottom form middle modules are arranged on the two transverse track beams, and the bottom form middle modules are divided into A-type bottom form middle modules and B-type bottom form middle modules, wherein the A-type bottom form middle module is provided with a reserved groove for forming the bottom anchor block of the bridge deck, and the number and spacing of the A-type bottom form middle modules are set according to the number and spacing of the bottom anchor blocks of the bridge deck, and multiple B-type bottom form middle modules are provided with various width types; each bottom form middle module is provided with 4 running wheels that can move along the transverse track, and the side walls of adjacent bottom form middle modules are tightly fitted.

2. A method for adjusting the adjustable bridge deck prefabricated pedestal according to claim 1, characterized in that: The following steps are involved: (1) Slide the bottom mold end modules at both ends outward along the longitudinal track for a certain distance, leaving space for the installation of the lifting device for the crane to lift the bottom mold middle module; (2) Determine the appropriate number and type of bottom formwork middle modules and their layout on the pedestal based on the bridge deck design drawings; (3) The middle modules of the bottom formwork that are not needed for this pouring are lifted off the pedestal, and then the remaining middle modules of the bottom formwork on the pedestal are moved along the transverse track, and each A-type bottom formwork middle module is moved to the appropriate position according to the anchor block spacing designed on the bridge deck; (4) Lift the middle module of the B-type bottom mold required for this pouring onto the pedestal and move it to the predetermined position; (5) Move the end modules of each bottom mold inward and press them against the middle module of the bottom mold to complete the adjustment of the prefabricated base.

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