Prefabricated combined bearing padstone device suitable for replacing railway cast steel movable support

Abstract

The utility model provides a prefabricated combined bearing padstone device suitable for replacing a railway cast steel movable support. The prefabricated combined bearing padstone device comprises a support and a combined part. The support is an original cast steel high support or a spherical support lower than the original cast steel high support, the support is mounted in the center of the upper end face of the assembly, and the sum of the height of the assembly and the height of the support is equal to the sum of the height of the original cast steel support, the height of the original supporting padstone and the thickness of the leveling mortar. According to the device, a cast steel high support can be rapidly replaced by a spherical support and the like through rapid construction technologies such as original supporting padstone rope saw cutting and hoisting in place after newly-installed supporting padstone is prefabricated and a post-anchoring technology, and the purpose that a large-height support is replaced by a small-height support is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge reinforcement and reconstruction and bridge bearing replacement, and particularly relates to a prefabricated combined bearing padstone device suitable for replacing railway cast steel movable bearings. Background Technique

[0002] In the early days, railway bridges usually adopted cast steel high bearings. The most typical feature was that the bearing height was very large and heavy, usually more than fifty or sixty centimeters. Limited by the height of the bearing body and the time of the railway skylight point, this type of bearing usually had to be replaced with the original bearing and the original specification. That is, after replacement, a cast steel high bearing still had to be used.

[0003] The replacement of railway bridge bearings cannot affect the safety of railway operation. The railway safety management is strict, and it usually needs to be completed within one skylight point. The effective operation time is usually only 2 hours. It is very difficult to complete the bearing replacement within two hours and ensure firmness.

[0004] For long railway bridges, the bearing capacity requirement of the bearings is high, the bearing weight is very large, it is difficult to handle and move, and a lot of auxiliary equipment is needed, which further increases the difficulty of bearing replacement.

[0005] Nowadays, railway bridges usually adopt spherical bearings, which have a small height, a large bearing capacity, and advantages such as flexible rotation and translation. If the cast steel high bearing is replaced with a spherical bearing, the bearing support padstone needs to be heightened. Not only the concrete needs to be heightened, but also the steel bars inside the padstone need to be heightened. Due to time limitations such as steel bar connection, formwork installation, concrete pouring and curing, bearing installation and leveling layer curing, it is basically impossible to replace the cast steel high bearing of railway bridges with other types of bearings. Summary of the Invention

[0006] Technical Solution: To solve the above technical problems, the utility model provides a prefabricated combined bearing padstone device suitable for replacing railway cast steel movable bearings, which specifically includes a bearing and a combined component; the bearing is the original cast steel high bearing or a spherical bearing with a height lower than the original cast steel high bearing, and the bearing is installed at the center position of the upper end surface of the combined component. The sum of the height of the combined component and the height of the bearing is equal to the sum of the height of the original cast steel bearing, the height of the original support padstone, and the thickness of the leveling mortar.

[0007] As an improvement, the combined component includes a steel shell connecting angle steel, an implanted screw, a precast pouring structure, and a strengthening member; the steel shell is a regular hexahedron structure, with openings at the top and bottom. One end of the bottom periphery is connected to a steel plate, and the other end is in direct contact with the bridge pier surface; one side of the connecting angle steel is connected to the side wall of the steel shell, and the other side fixes the steel plate on the bridge pier surface through the implanted screw; multiple groups of strengthening members are arranged and placed inside the steel shell; the precast pouring structure is a filling structure poured inside the steel shell.

[0008] As an improvement, the reinforcing member is a reinforcing rib, and multiple reinforcing ribs are arranged crosswise in the precast pouring structure.

[0009] As an improvement, it further includes a precast hole and a leveling and filling structure; the precast hole is arranged at the top of the precast pouring structure and is a precast installation hole for the bearing and the precast pouring structure; the leveling and filling structure is arranged in the precast hole for filling and leveling.

[0010] As an improvement, it further includes a grout structure, which is arranged at the position where the bottom surface of the precast pouring structure contacts the surface of the bridge pier, and is the structure after grout filling.

[0011] Beneficial effects: For the device proposed by the present utility model, through rapid construction techniques such as the original bearing padstone wire saw cutting, the precast of the newly installed bearing padstone and hoisting it in place, and the post-anchoring technique, the cast steel high bearing can be quickly replaced with a spherical bearing, etc., realizing the replacement of a large-height bearing with a small-height bearing. At the same time, the original bearing padstone is directly horizontally cut on the top surface of the bridge pier with a wire saw. The wire saw cutting is fast and the surface is flat, which is beneficial to the construction of subsequent processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the elevation layout drawing of the present utility model.

[0013] Figure 2 It is the schematic diagram of the bottom plane structure of the assembly of the present utility model.

[0014] Figure 3 It is the schematic diagram of the top plane structure of the assembly of the present utility model.

[0015] In the figure: bridge pier 1, steel shell 2, connecting angle steel 3, implanted screw 4, precast pouring structure 5, leveling and filling structure 6, precast hole 7, reinforcing member 8, grout structure 9, bearing 10. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following combines with the embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0017] See Figures 1-3 As shown, it is a precast combined bearing padstone device suitable for replacing the railway cast steel movable bearing of the present utility model, including a bearing 10 and an assembly; the bearing 10 is the original cast steel high bearing or a spherical bearing with a height lower than the original cast steel high bearing, and the bearing 10 is installed at the center position of the upper end surface of the assembly. The sum of the height of the assembly and the height of the bearing 10 is equal to the sum of the height of the original cast steel bearing, the height of the original support padstone, and the thickness of the leveling mortar.

[0018] Among them, in the present utility model, the cast steel high bearing of the railway bridge is replaced with a spherical bearing with a smaller height in a limited time by means of prefabricated combined bearing cushion stones, and it is also applicable to the original cast steel high bearing.

[0019] Furthermore, the assembly includes a steel shell 2, connecting angle steels 3, implanted screw rods 4, a prefabricated casting structure 5, and reinforcing members 8; the steel shell 2 is a regular hexahedron structure with open structures at the top and bottom, one end of the periphery at the bottom is connected to a steel plate, and the other end is in direct contact with the pier 1 surface; one side of the connecting angle steel 3 is connected to the side wall of the steel shell 2, and the other side fixes the steel plate on the pier 1 surface through the implanted screw rod 4; multiple groups of reinforcing members 8 are arranged inside the steel shell 2; the prefabricated casting structure 5 is a filling structure in the steel shell 2 formed by pouring, and the filling structure is high-strength concrete.

[0020] See Figure 2 As shown, the reinforcing members 8 are reinforcing ribs, and multiple of them are arranged crosswise inside the prefabricated casting structure 5, and preferably can be arranged horizontally and vertically crosswise inside the prefabricated casting structure 5.

[0021] In the present utility model, a combined welded steel structure shell and internal stiffening are made by using steel plates, steel sections, etc. The steel shell 2 is generally a regular hexahedron, and the steel plates are not welded at the top and bottom (i.e., not closed). Connecting steel plates are welded around the bottom, one end of the connecting steel bottom is welded to the steel shell, and the other end is in close contact with the top surface of the pier. Holes are drilled in the steel plate in close contact with the top surface of the pier. According to the hole positions, vertical holes are drilled in advance in the pier top concrete, and fixed through the implanted screw rods 4.

[0022] As a specific implementation manner of the present utility model, after the existing cushion stone and bearing are removed, the prefabricated steel shell is dragged to the predetermined position. Steel screw rods are implanted in the connecting steel plates and the drilled holes in the pier top and the nuts are tightened for anchoring; the gap between the welded steel shell and the pier top is filled with grouting material by pressure grouting until it is full; the holes on the pier top should be drilled in advance to save time.

[0023] In the present utility model, it further includes a prefabricated hole 7 and a leveling and filling structure 6; the prefabricated hole 7 is arranged at the top of the prefabricated casting structure 5 and is a prefabricated installation hole for the bearing 10 and the prefabricated casting structure 5; the leveling and filling structure 6 is arranged in the prefabricated hole 7 for filling and leveling. It also includes a grouting material structure 9, which is arranged at the position where the bottom surface of the prefabricated casting structure 5 is in contact with the surface of the pier 1 and is the structure after grouting material is filled.

[0024] Furthermore, high-strength concrete is poured and cured in the steel shell 2, and during the pouring process, the prefabricated hole 7 is set according to the specifications and lengths of the embedded bolts of the newly replaced bearing, etc.

[0025] Finally, install the bearing 10. After the bearings are assembled into a whole, they are first connected and fixed to the bottom of the main beam. According to the principle that the elevation of the main beam before and after jacking is the same, the main beam is lowered to the same elevation as before jacking. Install the anchor bolts of the bearing into the prefabricated hole 7 and adjust the position. Fill the leveling material between the bearing and the steel shell, and after curing, a leveling and filling structure 6 is formed. Lower the beam and anchor the bearing. Generally, the total height of the steel shell + the height of the newly replaced bearing + the height of the leveling layer, that is, the sum of the height of the assembly and the height of the bearing 10, is the same as the sum of the height of the original bearing padstone + the height of the cast steel bearing + the thickness of the leveling mortar.

[0026] The working process of the present utility model:

[0027] (1) The overall process of the rapid replacement of the bearing is carried out after the main beam is jacked up and the original bearing padstone is cut by a wire saw. First, the connection and reinforcement of the steel shell 2, the connecting angle steel 3, and the reinforcement 8 should be completed in advance. Pour the prefabricated casting structure 5 inside the composite member, and the prefabricated hole 7 should be made before curing. The height difference between the two types of bearings before and after the replacement of the height of the assembly and the height of the leveling layer, etc. are determined.

[0028] (2) After the prefabricated casting structure 5 is cured, drill holes at the top of the pier 1 according to the arrangement of the screw rods 4 implanted on the connecting angle steel 3. The holes in the pier 1 and the connecting angle steel 3 should be completely corresponding.

[0029] (3) Drag the composite member after pouring and curing the prefabricated casting structure 5 to the designated position (under the bearing), and construct 4 and cure. At the same time, pour the grouting material structure 9 between the pier 1 and the bottom of the composite member and cure.

[0030] (4) Install the bearing at the bottom of the main beam.

[0031] (5) Lower the beam to the design position, insert the anchor bolts of the bearing into the prefabricated hole 7, and fill the leveling and filling structure 6 into the prefabricated hole 7 and between the assembly and the bearing. After the leveling and filling structure 6 is cured, the jack for jacking up the main beam can be removed, and the normal stress state of the bearing is restored.

[0032] The above embodiments only represent several implementation manners of the present utility model, and the description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A precast combined bearing padstone device applicable to the replacement of railway cast steel movable bearings, characterized in that: It includes a bearing (10) and an assembly; the bearing (10) is an original cast steel high bearing or a spherical bearing with a height lower than that of the original cast steel high bearing, and the bearing (10) is installed at the center of the upper end face of the assembly. The sum of the height of the assembly and the height of the bearing (10) is equal to the sum of the height of the original cast steel bearing, the height of the original support cushion stone, and the thickness of the leveling mortar.

2. The prefabricated combined bearing padstone device applicable to the replacement of railway cast steel movable bearings according to claim 1, wherein: The assembly includes a steel shell (2), connecting angle steels (3), embedded screws (4), a precast pouring structure (5), and a reinforcing member (8); the steel shell (2) has a regular hexahedron structure, with openings at the top and bottom. One end of the four sides at the bottom is connected to a steel plate, and the other end is in direct contact with the surface of the bridge pier (1); one side of the connecting angle steel (3) is connected to the side wall of the steel shell (2), and the other side fixes the steel plate on the surface of the bridge pier (1) through the embedded screw (4); multiple groups of the reinforcing members (8) are arranged inside the steel shell (2); the precast pouring structure (5) is a filling structure poured inside the steel shell (2).

3. The prefabricated combined bearing padstone device applicable to the replacement of railway cast steel movable bearings according to claim 2, characterized in that: The reinforcing member (8) is a reinforcing bar, and multiple reinforcing bars are arranged crosswise inside the precast pouring structure (5).

4. The prefabricated combined bearing padstone device applicable to the replacement of railway cast steel movable bearings according to claim 2, characterized in that: It also includes a precast hole (7) and a leveling filling structure (6); the precast hole (7) is arranged at the top of the precast pouring structure (5) and is a precast installation hole for the bearing (10) and the precast pouring structure (5); the leveling filling structure (6) is arranged inside the precast hole (7) for filling and leveling.

5. The precast combined bearing padstone device applicable to the replacement of railway cast steel movable bearings according to claim 2, characterized in that: It also includes a grouting material structure (9), which is arranged at the position where the bottom surface of the precast pouring structure (5) is in contact with the surface of the bridge pier (1) and is the structure after grouting material is filled.

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