Method for quickly replacing same-type bridge pot bearing

Abstract

The application discloses a kind of same type bridge basin support quick replacement method, the method includes the following steps: cutting to original exposed anchor screw rod;Beam synchronous jacking;Remove original basin support upper steel plate and lower steel basin;New basin support is treated with bolt hole reaming;Process new bolt with hollow inner thread;Install new basin support lower steel basin, upper steel plate in the position of original bolt hole, while tightening new bolt;Jacking recovery, basin support replacement is completed, the method uses original anchor screw rod and does not change the stress state of original anchor screw rod, by cutting original exposed anchor screw rod, and by bolt, the upper steel plate and lower steel plate of basin support are connected with corresponding original anchor screw rod respectively, so as to fix new basin support, the method will not produce too much loss, its replacement process is convenient and fast, the jacking stroke of original beam body is small, and the construction method is simple, its replacement efficiency is high and quality is stable.

Description

Technical Field

[0001] This invention relates to the field of bridge maintenance technology, and in particular to a method for quick replacement of pot bearings of the same type for bridges. Background Technology

[0002] Bridge pot bearings are a type of bridge bearing constructed from steel components and rubber. They are characterized by high load-bearing capacity, large horizontal displacement, and flexible rotation. They are also lightweight, compact, simple in construction, easy to manufacture, save steel, and reduce costs, making them an ideal bearing structure for long-span bridges. During bridge operation and maintenance, long-term use leads to aging, damage, or structural changes. To ensure safe bridge operation, damaged pot bearings must be replaced promptly. However, the anchor bolts of the replacement pot bearings are often severely corroded, making it difficult to unscrew the anchor nuts. The traditional method involves removing the bearing pad, installing a new pot bearing, and then recasting the concrete. This method is cumbersome, time-consuming, inefficient, and expensive. Another method involves cutting a U-shaped groove in the lower steel plate of the new pot bearing at the anchor bolt location. After installing the pot bearing, a steel block is fabricated and welded to the U-shaped groove. While this method has a smaller lifting stroke, it requires on-site cutting and welding, causing significant damage to the bearing.

[0003] Therefore, based on the above problems, there is an urgent need to design a method and structure for replacing bridge pot bearings that is simple to construct and causes minimal damage to the original bearing structure, in order to overcome the shortcomings of existing technologies. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a quick replacement method for the same type of bridge pot bearing, which solves the problems of complex replacement process and serious wear and tear of existing pot bearings, thereby overcoming the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, this invention discloses a method for quick replacement of the same type of bridge pot bearing, which includes the following steps:

[0006] Step 1: First, cut off the exposed anchor bolts at the positions of the upper and lower steel plates in the old pot bearing;

[0007] Step 2: Use a synchronous jacking system to jack up the bridge beam whose bearings need to be replaced, and the jacking height of the bridge beam should at least meet the thickness of the lower steel plate of the pot bearing.

[0008] Step 3: Use auxiliary tools to remove the upper steel plate from the old pot bearing, and then remove the lower steel plate from the old pot bearing.

[0009] Step 4: Enlarge the first anchor bolt hole in the upper steel plate and the second anchor bolt hole in the lower steel plate of the new pot bearing.

[0010] Step 5: Based on the model of the anchor bolt connected to the old pot bearing, process the first bolt and the second bolt with hollow internal thread holes. The internal thread hole of the first bolt matches the anchor bolt connected to the upper steel plate of the old pot bearing, and the internal thread hole of the second bolt matches the anchor bolt connected to the lower steel plate of the old pot bearing.

[0011] Step 6: Place the lower steel plate of the new pot bearing into the original pot bearing installation position, and fit the second anchor bolt hole of the lower steel plate of the new pot bearing into the anchor bolt connected to the lower steel plate of the original pot bearing; then screw the second bolt into the second anchor bolt hole, and connect the internal thread hole of the second bolt to the anchor bolt connected to the lower steel plate of the original pot bearing.

[0012] Step 7: Place the upper steel plate of the new pot bearing into the original pot bearing installation position, and fit the first anchor bolt hole of the upper steel plate of the new pot bearing into the anchor bolt connected to the upper steel plate of the original pot bearing; then screw the first bolt into the first anchor bolt hole, and connect the internal thread hole of the first bolt to the anchor bolt connected to the upper steel plate of the original pot bearing.

[0013] Step 8: The synchronous jacking system returns oil and depressurizes, the beam returns to its original position, and the pot bearing replacement is completed.

[0014] As an improvement of the present invention, in step one, during the process of cutting off the exposed anchor bolts at the positions of the upper and lower steel plates in the old pot bearing, the cutting equipment needs to be close to the surface of the upper or lower steel plate, and the cutting position of the anchor bolts is flush with the surface of the upper or lower steel plate.

[0015] As a further improvement of the present invention, in step two, the lifting height of the synchronous lifting system is less than 2cm, and the lifting height of the synchronous lifting system is measured by a dial indicator.

[0016] As a further improvement of the present invention, in step five, the diameter of the first bolt is the same as the diameter of the first anchor bolt hole after the hole is enlarged; the diameter of the second bolt is the same as the diameter of the second anchor bolt hole after the hole is enlarged.

[0017] As a further improvement of the present invention, in step six, the depth to which the second bolt is screwed into the second anchor bolt hole is the same as the thickness of the steel plate under the pot bearing.

[0018] As an improvement of the present invention, in step seven, the depth to which the first bolt is screwed into the first anchor bolt hole is the same as the thickness of the steel plate on the pot bearing.

[0019] As a further improvement of the present invention, in step five, the internal threaded holes of the first bolt and the second bolt adopt a blind hole structure, and the depth of the internal threaded hole of the first bolt is not less than the thickness of the upper steel plate of the pot bearing, and the depth of the internal threaded hole of the second bolt is not less than the thickness of the lower steel plate of the pot bearing.

[0020] By employing this method, the present invention has at least the following advantages:

[0021] The bridge pot bearing quick replacement method of the present invention makes full use of the original anchor bolts. Without changing the stress state of the original anchor bolts, the original exposed anchor bolts are cut off, and the upper and lower steel plates of the pot bearing are connected to the corresponding original anchor bolts by a first bolt and a second bolt with special processing. This fixes the new pot bearing. The pot bearing will not suffer excessive wear in this method. The replacement process is convenient and quick. The original beam lifting stroke is small. The construction method is simple. The replacement efficiency is high and the quality is stable. Attached Figure Description

[0022] The above is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a schematic diagram of the installation structure of a traditional bridge pot bearing device and a bridge.

[0024] Figure 2 This is a structural schematic diagram of a traditional bridge pot bearing device.

[0025] Figure 3 This is a schematic diagram of the installation structure of the bridge pot bearing device and the bridge in an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the bridge pot bearing device in an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the structure of the first bolt or the second bolt in an embodiment of the present invention.

[0028] Meaning of reference numerals in the attached figures:

[0029] 1-First anchor bolt hole; 1'-First bolt; 2-Upper steel plate; 3-Second anchor bolt hole; 3'-Second bolt; 4-Lower steel plate; 5-Bridge beam; 6-Bridge bearing; 7-Bearing pad; 8-Anchor bolt; 801-Exposed anchor bolt. Detailed Implementation

[0030] Examples of embodiments described in this invention are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the invention, and should not be construed as limiting the invention.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Combination Figure 1-5 As shown, this embodiment discloses a quick replacement method for the same type of bridge pot bearing, which is used for convenient replacement of bridge pot bearing devices. In this embodiment, the bridge pot bearing device includes a pot bearing, a bridge bearing 6, and a bridge beam 5. The pot bearing includes an upper steel plate 2 and a lower steel plate 4. The lower steel plate 4 of the pot bearing is installed on the top of the bridge bearing 6 and is fixed to the top of the bridge bearing 6 by anchor bolts 8. In this embodiment, the top of the bridge bearing 6 is also provided with a bearing pad 7, and the lower steel plate 4 is installed on the bearing pad 7. The upper steel plate 2 of the pot bearing is connected to the bridge beam 5 and is fixed to the bottom of the bridge beam 5 by anchor bolts 8. This bridge pot bearing device can effectively bear the lateral and vertical loads of the bridge and transfer them downwards to the bridge bearing 6, while also playing a buffering and displacement adjustment role. The specific steps for the bridge pot bearing device in this embodiment include:

[0033] Step 1: First, the exposed anchor bolts 801 at the positions of the upper steel plate 2 and the lower steel plate 4 in the old pot bearing are cut off. In this embodiment, when cutting off the exposed anchor bolts 801 at the positions of the upper steel plate 2 and the lower steel plate 4 in the old pot bearing, the cutting equipment needs to be close to the surface of the upper steel plate 2 or the lower steel plate 4, and the cutting position of the anchor bolts 8 needs to be flush with the surface of the upper steel plate 2 or the lower steel plate 4, so as to facilitate the easy disassembly of the pot bearing and the anchor bolts 8.

[0034] Step 2: Use the synchronous jacking system to lift the bridge beam 5 whose bearing needs to be replaced, and the lifting height of the bridge beam 5 should at least meet the thickness of the lower steel plate 4 in the pot bearing; in this embodiment, the synchronous jacking system adopts a hydraulic jack system, and in order to reduce bridge deformation, the lifting height of the synchronous jacking system is generally less than 2cm, and the lifting height of the synchronous jacking system can be measured in real time by a dial indicator.

[0035] Step 3: Use auxiliary tools to remove the upper steel plate 2 from the old pot bearing, and then remove the lower steel plate 4 from the old pot bearing.

[0036] Step 4: Enlarge the first anchor bolt hole 1 in the upper steel plate 2 and the second anchor bolt hole 3 in the lower steel plate 4 of the new pot bearing; combined with Figure 2 and Figure 4 As shown, it should be noted that in this embodiment, the diameter of the first bolt 1' is the same as the diameter of the first anchor bolt hole 1 after the hole is enlarged; the diameter of the second bolt 3' is the same as the diameter of the second anchor bolt hole 3 after the hole is enlarged. This structure can ensure that the first bolt 1' and the second bolt 3' can be stably placed into the corresponding enlarged hole of the pot bearing, and at the same time, it can also avoid the first bolt 1' and the second bolt 3' from shaking in the enlarged hole due to excessive gap, so as to ensure a stable connection.

[0037] Step 5: Based on the model of the anchor bolt 8 connected to the old pot bearing, process the first bolt 1' and the second bolt 3' with hollow internal threaded holes, as follows: Figure 5 As shown, the internal threaded hole of the first bolt 1' matches the anchor bolt 8 connected to the upper steel plate 2 of the old pot bearing, and the internal threaded hole of the second bolt 3' matches the anchor bolt 8 connected to the lower steel plate 4 of the old pot bearing. In this embodiment, the internal threaded holes of the first bolt 1' and the second bolt 3' are both blind holes. The depth of the internal threaded hole of the first bolt 1' is not less than the thickness of the upper steel plate 2 of the pot bearing, and the depth of the internal threaded hole of the second bolt 3' is not less than the thickness of the lower steel plate 4 of the pot bearing. This structure can ensure that the connection of the first bolt 1' and the second bolt 3' is stable when connected to the corresponding anchor bolt, so as to ensure that the new pot bearing is installed firmly.

[0038] Step Six: Place the lower steel plate 4 of the new pot bearing into the original pot bearing installation position, and fit the second anchor bolt hole 3 of the lower steel plate 4 of the new pot bearing into the anchor bolt 8 connected to the lower steel plate 4 of the original pot bearing; then screw the second bolt 3' into the second anchor bolt hole 3, and connect the internal thread hole of the second bolt 3' to the anchor bolt 8 connected to the lower steel plate 4 of the original pot bearing; wherein the depth to which the second bolt 3' is screwed into the second anchor bolt hole 3 is the same as the thickness of the lower steel plate 4 of the pot bearing. Since the cutting position of the anchor bolt 8 is flush with the surface of the lower steel plate 4, when the second bolt 3' is screwed into the second anchor bolt hole 3, only by ensuring that the screwing depth of the second bolt 3' is the same as the thickness of the lower steel plate 4 of the pot bearing can the maximum connection length between the second bolt 3' and the anchor bolt be ensured, so as to improve the connection stability.

[0039] Step 7: Place the upper steel plate 2 of the new pot bearing into the original pot bearing installation position, and fit the first anchor bolt hole 1 of the upper steel plate 2 of the new pot bearing into the anchor bolt 8 connected to the upper steel plate 2 of the original pot bearing; then screw the first bolt 1' into the first anchor bolt hole 1, and connect the internal thread hole of the first bolt 1' to the anchor bolt 8 connected to the upper steel plate 2 of the original pot bearing; similarly, the depth to which the first bolt 1' is screwed into the first anchor bolt hole 1 is the same as the thickness of the upper steel plate 2 of the pot bearing. Only by ensuring that the screwing depth of the first bolt 1' is the same as the thickness of the upper steel plate 2 of the pot bearing can the first bolt 1' and the anchor bolt 8 reach the maximum connection length, so as to improve the connection stability.

[0040] Using the above method, when replacing the pot bearing in this embodiment, the original anchor bolts can be fully utilized without changing the stress state of the original anchor bolts. It has the characteristics of small beam lifting stroke, simple and quick construction method, no need to close traffic, and can be replaced again later.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, or alterations made by those skilled in the art using the disclosed technical content shall fall within the protection scope of the present invention.

Claims

1. A method for quick replacement of the same type of bridge pot bearing, characterized in that, Includes the following steps: Step 1: First, cut off the exposed anchor bolts at the positions of the upper and lower steel plates in the old pot bearing; Step 2: Use a synchronous jacking system to jack up the bridge beam whose bearings need to be replaced, and the jacking height of the bridge beam should at least meet the thickness of the lower steel plate of the pot bearing. Step 3: Use auxiliary tools to remove the upper steel plate from the old pot bearing, and then remove the lower steel plate from the old pot bearing. Step 4: Enlarge the first anchor bolt hole in the upper steel plate and the second anchor bolt hole in the lower steel plate of the new pot bearing. Step 5: Based on the model of the anchor bolt connected to the old pot bearing, process the first bolt and the second bolt with hollow internal thread holes. The internal thread hole of the first bolt matches the anchor bolt connected to the upper steel plate of the old pot bearing, and the internal thread hole of the second bolt matches the anchor bolt connected to the lower steel plate of the old pot bearing. Step 6: Place the lower steel plate of the new pot bearing into the original pot bearing installation position, and fit the second anchor bolt hole of the lower steel plate of the new pot bearing into the anchor bolt connected to the lower steel plate of the original pot bearing; then screw the second bolt into the second anchor bolt hole, and connect the internal thread hole of the second bolt to the anchor bolt connected to the lower steel plate of the original pot bearing. Step 7: Place the upper steel plate of the new pot bearing into the original pot bearing installation position, and fit the first anchor bolt hole of the upper steel plate of the new pot bearing into the anchor bolt connected to the upper steel plate of the original pot bearing; then screw the first bolt into the first anchor bolt hole, and connect the internal thread hole of the first bolt to the anchor bolt connected to the upper steel plate of the original pot bearing. Step 8: The synchronous jacking system returns oil and depressurizes, the beam returns to its original position, and the pot bearing replacement is completed.

2. The method for quick replacement of the same type of bridge pot bearing according to claim 1, characterized in that, In step one, during the process of cutting off the exposed anchor bolts at the positions of the upper and lower steel plates in the old pot bearing, the cutting equipment needs to be close to the surface of the upper or lower steel plate, and the cutting position of the anchor bolts should be flush with the surface of the upper or lower steel plate.

3. The method for quick replacement of the same type of bridge pot bearing according to claim 1, characterized in that, In step two, the lifting height of the synchronous lifting system is less than 2cm, and the lifting height of the synchronous lifting system is measured by a dial indicator.

4. The method for quick replacement of the same type of bridge pot bearing according to claim 1, characterized in that, In step five, the diameter of the first bolt is the same as the diameter of the first anchor bolt hole after reaming; the diameter of the second bolt is the same as the diameter of the second anchor bolt hole after reaming.

5. The method for quick replacement of the same type of bridge pot bearing according to claim 1, characterized in that, In step six, the depth to which the second bolt is screwed into the second anchor bolt hole is the same as the thickness of the steel plate under the pot bearing.

6. The method for quick replacement of the same type of bridge pot bearing according to claim 1, characterized in that, In step seven, the depth to which the first bolt is screwed into the first anchor bolt hole is the same as the thickness of the steel plate on the pot bearing.

7. The method for quick replacement of the same type of bridge pot bearing according to claim 1, characterized in that, In step five, the internal threaded holes of the first bolt and the second bolt adopt a blind hole structure, and the depth of the internal threaded hole of the first bolt is not less than the thickness of the upper steel plate of the pot bearing, and the depth of the internal threaded hole of the second bolt is not less than the thickness of the lower steel plate of the pot bearing.

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