Bottom side mold sliding device of bridge deck crane transformed from bridge fabrication machine

Abstract

The utility model provides a bottom side mould sliding device of a bridge deck crane transformed by a bridge fabrication machine, a hoisting system used for hoisting a steel box girder is arranged above a main girder of the bridge fabrication machine, outer mould longitudinal beams of a bottom mould and a side mould are hung on the poured box girder and the bridge fabrication machine, the bottom side mould sliding device comprises a plurality of groups of steel strands, a plurality of groups of steel beams and a plurality of steel beams, the bottom die and the side dies are temporarily locked on the poured box girder through steel strands, and the bottom die and the side dies descend or ascend along with the steel strands; the upper positioning frame and the lower positioning frame are horizontally fixed between the poured box girder and the steel box girder and are used for positioning and fixing the steel box girder; the number of the electric hoists is two, and the two electric hoists are symmetrically installed on the two sides of the flange plate of the steel box girder and used for dragging the bottom die or the side die. The bottom side formwork sliding device is simple in structure, convenient to install and take materials, capable of ensuring that hoisting of the steel box girder is not affected, capable of safely and rapidly sliding the bottom side formwork in place, convenient to construct and capable of saving manpower and material resources.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge-building machines used for the construction of steel-concrete parts of steel box beams of cable-stayed bridges, in particular to a bottom side mold sliding device of a bridge deck crane transformed from a bridge-building machine. Background Art

[0002] With the rapid development of high-speed railway construction, the proportion of long-span bridges in high-speed railway construction is increasing, and cantilever bridge-building machines play a vital role in the construction of long-span bridges. The steel box girder of the steel-concrete cable-stayed bridge is a steel-concrete structure composed of steel beams and concrete. The steel beams are transported to the bridge site after being manufactured in the factory and hoisted into place by large cranes. Due to the large size and weight of the steel beams, the high hoisting height, the large number of channel gates and the small width, it is necessary to select suitable bridge deck cranes and large floating cranes, which are costly and time-consuming.

[0003] At present, it is possible to consider upgrading the existing bridge-building machine to a bridge crane, that is, installing a lifting system above the front of the main beam of the bridge-building machine, and lifting the steel box beam into place through the lifting system on the bridge-building machine. However, due to the lifting of the steel box beam (that is, the front crossbeam of the bottom template does not invade the lifting range of the steel beam), when the modified bridge-building machine is moving, the bottom hanging basket of the bridge-building machine cannot move into place at one time with the bridge-building machine. If the steel template is disassembled and converted into a wooden template, or the steel template is removed and reinstalled, it will consume a lot of manpower and material resources, and the processing cycle is long, which will seriously affect the construction period of the steel beam and other processes, with low work efficiency, very high cost and great safety risks. Summary of the invention

[0004] The utility model provides a bottom side form sliding device for a bridge deck crane modified from a bridge construction machine. The bottom side form sliding device has a simple structure and is easy to install and obtain materials. It can ensure that the lifting of the steel box girder is not affected and the bottom side form can be slid into place safely and quickly, which is convenient for construction and saves manpower and material resources.

[0005] The technical solution adopted to achieve the above-mentioned purpose of the utility model is:

[0006] A bottom side mold sliding device of a bridge crane transformed from a bridge machine, wherein the main body of the bridge crane transformed from the bridge machine is composed of a bridge machine, a hoisting system for hoisting a steel box girder is installed above the main beam of the bridge machine, the side mold comprises a side mold main body and an outer mold longitudinal beam, the side mold main body is connected to the outer mold longitudinal beam, the bottom mold and the outer mold longitudinal beam are hung on the cast box girder and the bridge machine, and the bottom side mold sliding device comprises:

[0007] Steel strands, which are provided in multiple groups, the bottom formwork and the side formwork are temporarily locked on the cast box girder through the steel strands, and the bottom formwork and the side formwork are lowered or raised along with the steel strands;

[0008] The upper positioning frame and the lower positioning frame are both horizontally fixed between the cast box girder and the steel box girder hoisted by the hoisting system to position and fix the steel box girder;

[0009] Two electric hoists are provided and are symmetrically installed on both sides of the flange plate of the steel box girder for pulling the bottom formwork or the side formwork.

[0010] The bottom side mold sliding device also includes two groups of rollers, which are respectively installed on the outer mold longitudinal beams on both sides of the side mold. The side mold is lowered as a whole and falls on the two groups of rollers. When the electric hoist pulls the side mold, the side mold slides along the rollers.

[0011] The four corners of the bottom form are all provided with locking holes, and the steel strands pass through the reserved holes at the four corners of the bottom form to temporarily lock the bottom form onto the bottom plate of the cast box beam.

[0012] Locking holes are reserved at the front and rear corner points of the flange plate of the side form. The steel strands pass through the reserved holes at the four corners of the side form to temporarily lock the side form onto the top plate of the cast box girder.

[0013] Each set of steel strands for temporarily locking the bottom formwork consists of 3 steel strands, and each set of steel strands for temporarily locking the side formwork consists of 2 steel strands.

[0014] The upper positioning frame is fixed horizontally as a whole to the upper surface of the cast box beam top plate and the steel box beam top plate, and the lower positioning frame is fixed horizontally as a whole to the upper surface of the cast box beam bottom plate and the steel box beam bottom plate.

[0015] The upper positioning frame and the lower positioning frame are both composed of four groups of double H-shaped steels.

[0016] The bottom side mold sliding device is equipped with a bottom mold rear anchor system and a bottom mold front sling. After the bottom mold slides into place, the bottom mold front beam is connected to the steel box beam through the bottom mold front sling, and the bottom mold rear beam is anchored to the cast box beam through the bottom mold rear anchor system.

[0017] The cross beam in the bottom form is fixedly connected to the embedded steel plate at the web of the cast box beam.

[0018] The bottom side mold sliding device is equipped with a side mold anchoring system. After the side mold slides into place, the side mold is anchored on the upper positioning frame through the side mold anchoring system.

[0019] Compared with the prior art, the technical solution provided by the utility model has the following advantages:

[0020] 1. The bottom side form sliding device of the bridge crane transformed from the bridge construction machine provided by the utility model has a simple structure and is easy to install and obtain materials. It can ensure that the hoisting of the steel box girder is not affected, and at the same time, the bottom side form can be slid into place safely and quickly, which is convenient for construction and saves manpower and material resources.

[0021] 2. The bottom side form sliding device of the bridge crane transformed from the bridge-building machine provided by the utility model positions and fixes the steel box girder through the upper positioning frame and the lower positioning frame. The upper positioning frame and the lower positioning frame are both composed of double-piece H-shaped steel. The upper positioning frame and the lower positioning frame provide traction points for the sliding of the bottom form and the side form, ensuring the safety of the sliding of the bottom form and the side form, and also ensuring the stability and safety of the lifting of the steel box girder.

[0022] 3. The bottom side form sliding device of the utility model is equipped with a bottom form rear anchor system and a bottom form front sling. The bottom side form sliding device is also equipped with a side form anchor system to ensure that after the bottom side form slides into place, it can be firmly installed between the cast box beam and the positioned steel box beam. The bottom side form is evenly stressed to ensure the safety of the later concrete construction.

[0023] 4. In the utility model, when the side mold slides for the second time, the side mold is supported on the roller as a whole to ensure the stability and safety of the side mold sliding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the sliding method of the bottom side mold sliding device provided by the utility model Figure 1 ;

[0025] Figure 2 Schematic diagram of the sliding method of the bottom side mold sliding device provided by the utility model Figure 2 ;

[0026] Figure 3 Schematic diagram of the sliding method of the bottom side mold sliding device provided by the utility model Figure 3 ;

[0027] Figure 4 Schematic diagram of the sliding method of the bottom side mold sliding device provided by the utility model Figure 4 ;

[0028] Figure 5 Schematic diagram of the sliding method of the bottom side mold sliding device provided by the utility model Figure 5 ;

[0029] Figure 6 Schematic diagram of the sliding method of the bottom side mold sliding device provided by the utility model Figure 6 ;

[0030] In the figure: 1-cast box girder, 2-bridge-building machine, 3-bottom formwork, 4-side formwork, 401-external formwork longitudinal beam, 5-hoisting system, 6-steel strand, 7-upper positioning frame, 8-lower positioning frame, 9-steel plate, 10-fine-rolled rebar, 11-electric hoist, 12-bottom formwork front sling, 13-bottom formwork rear anchor system, 14-suspender rod, 15-roller. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] During the construction of the bridge-building machine, the bottom form 3 and the side form 4 are suspended on the cast box girder 1 and the bridge-building machine 2. When the bridge-building machine is moving, the suspension rods between the bottom form and the side form and the cast box girder are removed, so that the bottom form and the side form can move synchronously with the bridge-building machine. In this embodiment, the side form includes a side form body and an outer form longitudinal beam 401. The side form body is connected to the outer form longitudinal beam, and the outer form longitudinal beam is suspended on the cast box girder and the bridge-building machine, so that the side form is suspended on the cast box girder and the bridge-building machine as a whole. The main body of the bridge deck crane modified from the bridge-building machine in the utility model is composed of a bridge-building machine. A hoisting system 5 is installed above the main beam of the bridge-building machine. The steel box girder is hoisted into place by the hoisting system. In order to avoid the bottom form and the side form affecting the hoisting of the steel box girder, the bottom form and the side form need to be separately moved to the bottom of the bridge-building machine after the steel box girder is hoisted into place, connected to the bridge-building machine and the box girder is cast. The bridge crane converted from a bridge-building machine is a prior art, and its structure will not be described in detail here.

[0033] The bottom side mold sliding device of the bridge deck crane transformed from the bridge construction machine provided by the present invention comprises a steel strand 6, an upper positioning frame 7, a lower positioning frame 8, an electric hoist 11 and a roller 15.

[0034] There are multiple groups of steel strands, and the bottom mold and the side molds are temporarily locked to the cast box girder through the steel strands, and the bottom mold and the side molds are lowered or lifted with the steel strands. Specifically, locking holes are reserved at the four corners of the bottom mold, and the steel strands pass through the reserved holes at the four corners of the bottom mold to temporarily lock the bottom mold to the bottom plate of the cast box girder. Locking holes are reserved at the front and rear corner points of the flange plate of the side mold, and the steel strands pass through the reserved holes at the four corners of the side mold to temporarily lock the side mold to the top plate of the cast box girder. Furthermore, each group of steel strands for temporarily locking the bottom mold consists of 3 steel strands, and each group of steel strands for temporarily locking the side mold consists of 2 steel strands.

[0035] The upper positioning frame and the lower positioning frame are both horizontally fixed between the cast box girder and the steel box girder hoisted by the hoisting system to position and fix the steel box girder. Specifically, the upper positioning frame is horizontally fixed as a whole to the upper surface of the cast box girder top plate and the steel box girder top plate, and the lower positioning frame is horizontally fixed as a whole to the upper surface of the cast box girder bottom plate and the steel box girder bottom plate. Further, the upper positioning frame and the lower positioning frame are both composed of four groups of double-piece H-shaped steels. Further, the cast box girder is pre-embedded with steel plates 9 at corresponding positions, and the two ends of the double-piece H-shaped steel are respectively fixed to the steel plates and steel box girder on the cast box girder. Further, the double-piece H-shaped steel is locked with the steel plates and steel box girder by precision-rolled threaded steel 10 (with matching nuts and gaskets).

[0036] Two electric hoists are provided, and the two electric hoists are symmetrically installed on both sides of the flange plate of the steel box girder, and are used to pull the bottom form or the side form. Specifically, the specifications of the electric hoists are all 10t electric hoists.

[0037] There are two groups of rollers, which are respectively installed on the outer mold longitudinal beams on both sides of the side mold. The side mold is lowered as a whole and falls on the two groups of rollers. When the electric hoist pulls the side mold, the side mold slides along the rollers.

[0038] In this embodiment, the bottom side mold sliding device is equipped with a bottom mold rear anchor system 13 and a bottom mold front sling 12. After the bottom mold slides into place, the bottom mold front beam is connected to the steel box beam through the bottom mold front sling, and the bottom mold rear beam is anchored to the cast box beam through the bottom mold rear anchor system. Specifically, the bottom mold middle beam is fixedly connected to the embedded steel plate at the web of the cast box beam through the precision-rolled threaded steel bar, which further ensures the stability of the bottom mold installation and the safety during concrete pouring.

[0039] In this embodiment, the bottom side mold sliding device is also equipped with a side mold anchoring system (not shown in the figure). After the side mold slides into place, the side mold is anchored on the upper positioning frame through the side mold anchoring system.

[0040] The sliding method of the bottom side mold sliding device of the bridge deck crane transformed from the bridge construction machine provided in this embodiment comprises the following steps:

[0041] (1) After the pouring construction is completed, the hangers between the bottom formwork and the side formwork (external formwork longitudinal beam) and the cast box girder are removed. The bottom formwork and the side formwork are moved synchronously with the bridge-building machine to a certain distance from the steel box girder hoisting range. The bottom formwork and the side formwork are temporarily locked to the cast box girder through steel strands. Figure 1 As shown, the hangers between the bottom form and the side form (external form longitudinal beam) and the bridge-building machine are removed; specifically, after the bottom form and the side form are synchronously moved with the bridge-building machine, the bottom form and the side form do not invade the lifting range of the steel box girder; preferably, the bottom form and the side form are synchronously moved with the bridge-building machine to a distance of 50 cm from the lifting range of the steel box girder, that is, after the steel box girder is hoisted in place, the distance between the bottom form and the side form is 50 cm. When pouring concrete, temporary locking holes for the bottom form and the side form and holes for the bottom form rear anchor system (see below) can be reserved at the designed positions of the flange plates of the bottom plate and the top plate of the concrete main beam.

[0042] (2) The bridge-building machine continues to move until the hoisting system is just within the hoisting range of the steel box girder. The hoisting system hoists the steel box girder and positions it. The steel box girder is then positioned and fixed on the cast box girder through the upper and lower positioning frames. Figure 2 ;

[0043] (3) Electric hoists are symmetrically installed on both sides of the flange plate of the steel box girder, and the electric hoists are connected to the front of the bottom mold. The steel strands temporarily locked on the bottom mold are slowly lowered, so that the bottom mold is synchronously lowered a certain distance with the steel strands. Figure 2 , the bottom mold is pulled forward by the electric hoist to the bottom mold installation position, such as Figure 3As shown, the front and rear parts of the bottom formwork are anchored to the steel box girder and the cast box girder respectively, and the temporary locking of the bottom formwork is released, thereby completing the secondary movement of the bottom formwork; specifically, the height to which the steel strands are lowered is consistent with the distance the bottom formwork moves forward, so the distance that the bottom formwork needs to move forward can be calculated first, and the height to which the steel strands are lowered can be calculated based on the distance.

[0044] (4) Slide the outer formwork longitudinal beam forward until it is flush with the bridge-building machine, and install the hanger 14 between the outer formwork longitudinal beam and the bridge-building machine. Figure 4 and Figure 5 As shown in the figure, two sets of rollers are installed on the outer mold longitudinal beam, and the steel strands temporarily locked on the side mold are lowered, so that the side mold body is lowered onto the rollers along with the steel strands, and the side mold is pulled forward and slid by the electric hoists on both sides of the steel box girder flange plate. After the side mold is pulled to the specified position, the side mold is anchored on the upper positioning frame, and the temporary locking of the side mold is released, thereby completing the secondary movement of the side mold. Figure 6 shown.

[0045] The bottom and side form sliding device of the bridge crane converted from a bridge-building machine provided in this embodiment has a simple structure and is easy to install and obtain materials. It can ensure the safety of the sliding of the bottom and side forms, improve work efficiency, and ensure the safety and quality during the concrete pouring process.

Claims

1. A bottom side mold sliding device of a bridge crane transformed from a bridge machine, wherein the main body of the bridge crane transformed from the bridge machine is composed of a bridge machine, a hoisting system for hoisting a steel box girder is installed above the main beam of the bridge machine, the side mold includes a side mold main body and an outer mold longitudinal beam, the side mold main body is connected to the outer mold longitudinal beam, and the bottom mold and the outer mold longitudinal beam are hung on the cast box girder and the bridge machine, characterized in that: The bottom mold sliding device comprises: Steel strands, which are provided in multiple groups, the bottom formwork and the side formwork are temporarily locked on the cast box girder through the steel strands, and the bottom formwork and the side formwork are lowered or raised along with the steel strands; The upper positioning frame and the lower positioning frame are both horizontally fixed between the cast box girder and the steel box girder hoisted by the hoisting system to position and fix the steel box girder; Two electric hoists are provided and are symmetrically installed on both sides of the flange plate of the steel box girder for pulling the bottom formwork or the side formwork.

2. The bottom side mold sliding device of the bridge deck crane transformed from a bridge construction machine according to claim 1 is characterized in that: The bottom side mold sliding device also includes two groups of rollers, which are respectively installed on the outer mold longitudinal beams on both sides of the side mold. The side mold is lowered as a whole and falls on the two groups of rollers. When the electric hoist pulls the side mold, the side mold slides along the rollers.

3. The bottom side mold sliding device of the bridge deck crane transformed from a bridge construction machine according to claim 1 is characterized in that: The four corners of the bottom form are all provided with locking holes, and the steel strands pass through the reserved holes at the four corners of the bottom form to temporarily lock the bottom form onto the bottom plate of the cast box beam.

4. The bottom side mold sliding device of the bridge deck crane transformed from a bridge construction machine according to claim 1 is characterized in that: Locking holes are reserved at the front and rear corner points of the flange plate of the side form. The steel strands pass through the reserved holes at the four corners of the side form to temporarily lock the side form onto the top plate of the cast box girder.

5. The bottom side mold sliding device of the bridge deck crane transformed from a bridge construction machine according to claim 1 is characterized in that: Each set of steel strands for temporarily locking the bottom formwork consists of 3 steel strands, and each set of steel strands for temporarily locking the side formwork consists of 2 steel strands.

6. The bottom side mold sliding device of the bridge crane transformed from a bridge construction machine according to claim 1 is characterized in that: The upper positioning frame is fixed horizontally as a whole to the upper surface of the cast box beam top plate and the steel box beam top plate, and the lower positioning frame is fixed horizontally as a whole to the upper surface of the cast box beam bottom plate and the steel box beam bottom plate.

7. The bottom side mold sliding device of the bridge crane transformed from a bridge construction machine according to claim 1 is characterized in that: The upper positioning frame and the lower positioning frame are both composed of four groups of double H-shaped steels.

8. The bottom side mold sliding device of the bridge deck crane transformed from a bridge construction machine according to claim 1 is characterized in that: The bottom side mold sliding device is equipped with a bottom mold rear anchor system and a bottom mold front sling. After the bottom mold slides into place, the bottom mold front beam is connected to the steel box beam through the bottom mold front sling, and the bottom mold rear beam is anchored to the cast box beam through the bottom mold rear anchor system.

9. The bottom side mold sliding device of the bridge deck crane transformed from a bridge construction machine according to claim 8 is characterized in that: The cross beam in the bottom form is fixedly connected to the embedded steel plate at the web of the cast box beam.

10. The bottom side mold sliding device of the bridge deck crane transformed from a bridge construction machine according to claim 1 is characterized in that: The bottom side mold sliding device is equipped with a side mold anchoring system. After the side mold slides into place, the side mold is anchored on the upper positioning frame through the side mold anchoring system.

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