Detachable adjustable span portable steel-concrete type steel combined prefabricated pedestal

Abstract

The utility model discloses a detachable adjustable span portable steel mixed steel combined prefabricated pedestal, is the prefabricated beam body's production platform, belongs to highway engineering prefabricated beam body technical field, include: reinforced concrete foundation, steel combined pedestal, steel combined pedestal sets up at the top of reinforced concrete foundation to be detachably connected with reinforced concrete foundation, two groups of support embedded steel plate adjusting parts, two groups of support embedded steel plate adjusting parts are arranged respectively at both ends of steel combined pedestal, realize the accurate installation of prefabricated beam body. The utility model provides a detachable adjustable span portable steel mixed steel combined prefabricated pedestal, and the rigidity of foundation is big, and the stability is good, and the upper steel combined pedestal of pedestal is flexible, and the cost is low, and the reverse arch adjustment is convenient, and the embedded steel plate slope adjustment of beam bottom is flexible, can realize the quick conversion of different span prefabricated beam body.

Description

Technical Field

[0001] This utility model belongs to the technical field of precast beams for highway engineering, specifically relating to a detachable and adjustable span portable steel-concrete composite precast platform. Background Technology

[0002] Due to the large number of precast beams, various spans and angles, tight schedules, and high land acquisition costs in highway projects, traditional precast concrete platforms cannot quickly convert between platforms of different span lengths and angles. Furthermore, the camber value is difficult to control, requiring the removal of the original platform and the construction of a new platform or the acquisition of new land, which leads to extended construction periods, increased costs, and difficulty in controlling beam camber. Utility Model Content

[0003] To solve the above problems, the present invention adopts the following technical solution:

[0004] A detachable and adjustable span portable steel-concrete composite prefabrication platform serves as a fabrication platform for prefabricated beams, comprising:

[0005] Reinforced concrete foundation;

[0006] A steel composite platform is provided on top of the reinforced concrete foundation and is detachably connected to the reinforced concrete foundation.

[0007] Two sets of support embedded steel plate adjustment components are respectively set at both ends of the steel composite platform to adjust the height and slope of the embedded steel plate at the bottom of the beam on the steel composite platform.

[0008] Furthermore, the steel composite platform includes a longitudinal main beam I-beam, multiple transverse distribution beam I-beams, a grout-stopping channel steel, and a platform steel plate; the longitudinal main beam I-beam is fixedly connected to the reinforced concrete foundation via a track pressure plate; both ends of the longitudinal main beam I-beam extend along the length of the reinforced concrete; multiple transverse distribution beam I-beams are spaced apart and positioned on top of the longitudinal main beam I-beam, and are fixedly connected to the longitudinal main beam I-beam;

[0009] The two ends of the transverse distribution beam I-beam extend along the width direction of the longitudinal main beam I-beam; the pedestal steel plate is disposed between the transverse distribution beam I-beam and the precast beam body, and is fixedly connected to the transverse distribution beam I-beam; the grout-stopping channel steel is disposed at both ends of the transverse distribution beam I-beam along its length, and is fixedly connected to the transverse distribution beam I-beam.

[0010] Furthermore, a lifting beam hole steel plate is provided at the position of the lifting beam hole steel plate at the top of the longitudinal main beam I-beam; a supporting channel steel is provided between the lifting beam hole steel plate and the top of the longitudinal main beam I-beam to support the lifting beam hole steel plate.

[0011] Furthermore, the support embedded steel plate adjustment component includes an adjustable steel plate and an adjustable bolt; the adjustable steel plate is located at the bottom embedded steel plate position at the top of the longitudinal main beam I-beam, and is connected to the top of the longitudinal main beam I-beam at an adjustable height via the adjustable bolt.

[0012] Furthermore, multiple adjustable bolts are provided; the multiple adjustable bolts are circumferentially arranged at the bottom of the adjustable steel plate to adjust the height and tilt angle of the pre-embedded steel plate at the bottom of the beam.

[0013] Beneficial effects:

[0014] This utility model provides a detachable and adjustable span portable steel-concrete composite precast platform that is safe, reliable, and reusable. By combining a reinforced concrete foundation with a steel composite platform, the traditional concrete precast beam platform is improved into a steel-concrete composite platform. The lower part of the platform is a reinforced concrete foundation with high rigidity and good stability. At the same time, the upper part of the platform is a steel composite platform that is flexible to install and dismantle, low in cost, and easy to adjust the anti-arch. The slope of the pre-embedded steel plate at the bottom of the beam can be adjusted flexibly, enabling rapid conversion of precast beams with different spans. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the detachable and adjustable span portable steel-concrete composite prefabricated platform of Example 1;

[0016] Figure 2 This is a front view of the reinforced concrete foundation of the detachable and adjustable span portable steel-concrete composite prefabricated platform of Example 1.

[0017] Figure 3 for Figure 1 Local magnification Figure 1 ;

[0018] Figure 4 for Figure 1 Local magnification Figure 2 ;

[0019] Figure 5 This is a plan view of the lower foundation of the detachable and adjustable span portable steel-concrete composite prefabricated pedestal in Example 1.

[0020] Figure 6 for Figure 5 Sectional view along line AA;

[0021] Figure 7 for Figure 5 Sectional view along the BB direction;

[0022] Figure 8 Top plan view of the detachable and adjustable span portable steel-concrete composite prefabricated pedestal in Example 1;

[0023] The components include: 1. Reinforced concrete foundation; 2. Expansion bolts; 3. Track pressure plate; 4. Longitudinal main beam I-beam; 5. Transverse distribution beam I-beam; 6. Grouting channel steel; 7. Abutment steel plate; 8. Nut; 9. Adjustable bolt; 10. Adjustable steel plate; 11. Position of pre-embedded steel plate at the bottom of the beam; 12. Support channel steel; 13. Steel plate for lifting beam hole; 14. Precast beam body; 15. Position of steel plate for lifting beam hole; 16. Beam end. Detailed Implementation

[0024] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below.

[0025] Example 1

[0026] Reference Figures 1 to 8 A detachable and adjustable span portable steel-concrete composite prefabrication platform, serving as a fabrication platform for prefabricated beams, includes:

[0027] Reinforced concrete foundation 1;

[0028] A steel composite platform is set on top of the reinforced concrete foundation 1 and is detachably connected to the reinforced concrete foundation 1.

[0029] Precast beam 14 is set on top of the steel composite platform and contacts the steel composite platform;

[0030] Two sets of support embedded steel plate adjustment components are respectively set at both ends of the steel composite platform to adjust the height and slope of the embedded steel plate position at the bottom of the beam on the steel composite platform.

[0031] The steel composite platform is fixed to the reinforced concrete foundation 1 by inserting expansion bolts 2 and track pressure plates 3.

[0032] In this embodiment, the steel composite platform includes a longitudinal main beam I-beam 4, multiple transverse distribution beam I-beams 5, a grout-stopping channel steel 6, and a platform steel plate 7; the longitudinal main beam I-beam 4 is fixedly connected to the reinforced concrete foundation 1 through a track pressure plate 3; both ends of the longitudinal main beam I-beam 4 extend along the length direction of the reinforced concrete; multiple spaced transverse distribution beam I-beams 5 are arranged on top of the longitudinal main beam I-beam 4 and are fixedly connected to the longitudinal main beam I-beam 4;

[0033] The two ends of the transverse distribution beam I-beam 5 extend along the width direction of the longitudinal main beam I-beam 4; the pedestal steel plate 7 is set between the transverse distribution beam I-beam 5 and the precast beam 14, and is fixedly connected to the transverse distribution beam I-beam 5; the grout-stopping channel steel 6 is set at both ends of the transverse distribution beam I-beam 5 along its length, and is fixedly connected to the transverse distribution beam I-beam 5.

[0034] Multiple transverse distribution beams (I-beams 5) and multiple longitudinal main beams (I-beams 4) are provided. Multiple longitudinal main beams (I-beams 4) are arranged sequentially along the width direction of the reinforced concrete foundation, and multiple transverse distribution beams (I-beams 5) are arranged sequentially along the length direction of the reinforced concrete foundation.

[0035] In this embodiment, a lifting beam hole steel plate 13 is provided at position 15 of the lifting beam hole steel plate at the top of the longitudinal main beam I-beam 4; a supporting channel steel 12 is provided between the lifting beam hole steel plate 13 and the top of the longitudinal main beam I-beam 4 to support the lifting beam hole steel plate 13.

[0036] The reinforced concrete foundation 1 and the longitudinal main beam I-beam 4 of the steel composite platform are fixed together by expansion bolts 2 and track pressure plates 3.

[0037] Through the above technical solution, the reinforced concrete foundation 1 is the lower bearing foundation of the pedestal, located below the steel composite pedestal. The combined structure of the longitudinal main beam I-beam 4, the transverse distribution beam I-beam 5, the grout stop channel steel 6 and the pedestal steel plate 7 in the steel composite pedestal is located above the reinforced concrete foundation 1. The pedestal steel plate 7 directly contacts the precast beam 14 and can be flexibly disassembled and assembled.

[0038] In this embodiment, the support embedded steel plate adjustment component includes an adjustable steel plate 10 and an adjustable bolt 9; the adjustable steel plate 10 is set at the bottom embedded steel plate position 11 at the top of the longitudinal main beam I-beam 4, and is set between the transverse distribution beam I-beam 5 and the precast beam 14, and is connected to the top of the longitudinal main beam I-beam 4 at an adjustable height through the adjustable bolt 9.

[0039] In this embodiment, multiple adjustable bolts 9 are provided; the multiple adjustable bolts 9 are arranged circumferentially at the bottom of the adjustable steel plate 10 to adjust the height and slope of the adjustable steel plate 10 (the steel plate embedded at the bottom of the beam).

[0040] Through the above technical solution, each set of support embedded steel plate adjustment components includes multiple adjustable bolts 9, which are circumferentially arranged at the bottom of the adjustable steel plate. Adjustable steel plates 10 are set at the beam bottom embedded steel plate positions 11 at both ends of the bottom of the precast beam 14. The height and slope of the beam bottom embedded steel plate are adjusted by adjusting the adjustable bolts 9 (with fixing nuts 8).

[0041] Taking a certain expressway project as an example: The expressway project has 224 20mT beams and 825 30mT beams. The beam erection construction is located on the critical path. In accordance with the beam erection construction organization and arrangement, the 20mT beams are prefabricated first and then the 30mT beams are prefabricated.

[0042] like Figure 7 As shown, the 20mT beam fabrication platform is 21m long. The foundations at both ends of the platform consider the concentrated loads at both ends of the precast beam after tensioning (14 seconds). Figure 5 The two ends are provided with enlarged foundations, each measuring 1.8 × 2.5 meters. The enlarged foundations are reinforced with steel bars. Since enlarged foundations are also required at the ends of the 30mT beam abutment, they are poured simultaneously during the construction of the 20mT beam abutment foundation. The foundation structure under the 14 precast beam abutments is made of C25 concrete. The foundation width in the middle part of the abutment is 0.54m and the height is 0.3m.

[0043] like Figure 3 As shown, the upper structure of the platform uses longitudinal 22B I-beams as the main longitudinal beams (I-beams 4), with 16# transverse distribution beams (I-beams 5) above them. A platform steel plate 7 is laid across the transverse distribution beams (I-beams 5). 5# grout-stopping channel steel 6 is welded to the transverse distribution beams (I-beams 5) on both sides below the platform steel plate 7. Grout-stopping strips are installed inside the grout-stopping channel steel 6 to prevent grout leakage at the bottom during concrete pouring. The longitudinal main beams (I-beams 4) of the 22B I-beams are arranged at equal intervals longitudinally, and the transverse distribution beams (I-beams 5) of the 16# I-beams are arranged at equal intervals of 0.5m laterally. All components—the longitudinal main beams (I-beams 4), transverse distribution beams (I-beams 5), grout-stopping channel steel 6, and platform steel plate 7—are welded. Figure 3 , 5 6. Expansion bolts 2 are used to fix the reinforced concrete foundation 1 and the steel composite platform together with track pressure plates 3. Expansion bolts 2 are implanted in the foundation of the beam platform, and track pressure plates 3 are used to fasten the two sides of the longitudinal main beam I-beam 4 to form an integral structure.

[0044] like Figure 4As shown, the precast beam body 14 has adjustable steel plates 10 at the bottom of the beam on both sides using adjustable bolts 9 (with fixing nuts 8) to adjust the height of the precast steel plates 10. The precast steel plates 10 at the bottom of the beam are adjustable in height, which makes it easy to adjust the height of the precast steel plates at the bottom of the beam. The platform is arranged with lifting holes at equal intervals at the beam ends according to the drawings, and lifting hole steel plates 13 are set to facilitate beam lifting operations.

[0045] After the 20mT beam is prefabricated, it is quickly converted into a 30mT beam prefabrication platform. The bottom reinforced concrete foundation 1 remains unchanged. The transverse (width direction) spacing of the longitudinal main beam I-beam 4 is adjusted according to the bottom width of the 30mT beam (e.g., the bottom width of the 20mT and 30mT beams are the same). Alternatively, the transverse (width direction) spacing of the main beam can be extended directly without adjusting the longitudinal main beam I-beam 4, and then transverse distribution beam I-beams 5 are arranged at equal intervals. A steel plate low formwork is laid continuously. Expansion bolts 2 are used to fix the reinforced concrete foundation 1 and the steel composite platform together with track pressure plates 3. Expansion bolts 2 are implanted in the foundation of the beam fabrication platform. The longitudinal 22B I-beam is fastened to both sides of the longitudinal main beam I-beam 4 using track pressure plates 3. Transverse 16# transverse distribution beam I-beams 5 are arranged at equal intervals. A platform steel plate 7 is laid continuously above the transverse distribution beam I-beams 5.

[0046] Example 2

[0047] This embodiment is based on embodiment 1: The reinforced concrete foundation 1 is arranged along the length of the longitudinal main beam I-beam 4, and the material is C25 reinforced concrete. The beam ends are set with enlarged foundations, and different span beam ends need to be reserved. This embodiment takes a 20m span precast beam 14 to a 30m span precast beam 14 as an example. Three beam ends are set. The steel composite platform consists of expansion bolts 2, track pressure plate 3, longitudinal main beam I-beam 4 (22B I-beam), transverse distribution beam I-beam 5 (16# I-beam), grout stop channel steel 6 (5# channel steel), and platform steel plate 7 (Q235B) from bottom to top.

[0048] The above are merely preferred embodiments of the present utility model and do not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A detachable and adjustable span portable steel-concrete composite prefabrication platform, serving as a fabrication platform for prefabricated beams, characterized in that... include: Reinforced concrete foundation; A steel composite platform is provided on top of the reinforced concrete foundation and is detachably connected to the reinforced concrete foundation. Two sets of support embedded steel plate adjustment components are respectively set at both ends of the steel composite platform to adjust the height and slope of the embedded steel plate at the bottom of the beam on the steel composite platform.

2. The detachable and adjustable span portable steel-concrete composite prefabrication platform according to claim 1, characterized in that, The steel composite platform includes a longitudinal main beam I-beam, multiple transverse distribution beam I-beams, a grout-stopping channel steel, and a platform steel plate; the longitudinal main beam I-beam is fixedly connected to the reinforced concrete foundation via a track pressure plate; both ends of the longitudinal main beam I-beam extend along the length of the reinforced concrete foundation; multiple transverse distribution beam I-beams are spaced apart and positioned on top of the longitudinal main beam I-beam, and are fixedly connected to the longitudinal main beam I-beam; The two ends of the transverse distribution beam I-beam extend along the width direction of the longitudinal main beam I-beam; the pedestal steel plate is disposed between the transverse distribution beam I-beam and the precast beam body, and is fixedly connected to the transverse distribution beam I-beam; the grout-stopping channel steel is disposed at both ends of the transverse distribution beam I-beam along its length, and is fixedly connected to the transverse distribution beam I-beam.

3. The detachable and adjustable span portable steel-concrete composite prefabricated platform according to claim 2, characterized in that, The lifting beam hole steel plate is detachably connected to the top of the longitudinal main beam I-beam; a support channel steel is provided between the lifting beam hole steel plate and the top of the longitudinal main beam I-beam to support the lifting beam hole steel plate.

4. The detachable and adjustable span portable steel-concrete composite prefabricated platform according to claim 3, characterized in that, Each set of the support embedded steel plate adjustment components includes an adjustable steel plate and an adjustable bolt; the adjustable steel plate is set at the position of the bottom embedded steel plate at the top of the longitudinal main beam I-beam, and is connected to the top of the longitudinal main beam I-beam at an adjustable height via the adjustable bolt.

5. The detachable and adjustable span portable steel-concrete composite prefabricated platform according to claim 4, characterized in that, Multiple adjustable bolts are provided; the multiple adjustable bolts are circumferentially arranged at the bottom of the adjustable steel plate to adjust the height and tilt angle of the pre-embedded steel plate at the bottom of the beam.

Images