Construction method of steel backing plate of bridge engineering support

Abstract

The application discloses a construction method of a bridge engineering support steel backing plate, and specifically comprises the following steps: S1. construction preparation; including pre-processing of the steel backing plate, pre-processing of connecting pieces and pre-processing of main reinforcement; the upper surface of the steel backing plate is symmetrically provided with two rows of hoop reinforcement mounting grooves, and one side surface of the steel backing plate is provided with a plurality of main reinforcement mounting grooves; S2. connection of the steel backing plate and the main reinforcement; a connecting piece is sleeved on each main reinforcement, then a threaded section of each main reinforcement is inserted into a corresponding main reinforcement mounting groove, adhesive is filled in a gap between the main reinforcement and the main reinforcement mounting groove, and finally the connecting piece is screwed; S3. connection of the steel backing plate and the hoop reinforcement; two ends of each hoop reinforcement are respectively welded in corresponding hoop reinforcement mounting grooves; and S4. concrete pouring. The construction method greatly reduces the welding operation amount, avoids some bridge diseases caused by welding quality problems, reduces the waste of steel bars, and is easier to level the steel backing plate and control the construction quality.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, and more specifically, to a construction method for steel bearing plates in bridge engineering. Background Technology

[0002] In bridge construction, steel bearing plates are required at the bridge bearing locations. These plates are embedded in the bottom of the bridge slab and their main function is to provide a rigid and flat contact surface for the rubber bearings. The steel bearing plates are generally quite thick, encroaching on the concrete cover of the bridge slab and spatially interfering with the longitudinal reinforcement bars of the slab. Currently, the common practice is to bend the reinforcement bars near the steel bearing plate installation location upwards in advance to avoid the plate, then weld the reinforcement bars to the steel bearing plate, and finally weld the stirrups at the top of the steel bearing plate to both the plate and the reinforcement bars. Currently, the above construction method has the following problems: First, the main reinforcement bars near the installation position of the bearing steel plate need to be bent at two small angles in advance, and the bending quality is difficult to control. After the main reinforcement bars are welded to the steel plate, the weld is prone to initial tensile stress, resulting in poor weld quality. Second, due to the bending quality of the main reinforcement bars and the welding process quality between the main reinforcement bars and the steel plate, it is easy to make the steel plate difficult to level. After the beam is formed, the flatness of the steel plate is difficult to meet the process requirements. Third, the construction work area within the installation position of the steel plate is small, and there are many reinforcement bars distributed in a complicated and disorderly manner, which makes welding difficult and construction efficiency low. At the same time, the welding length and quality are difficult to meet the technical requirements, which can easily cause bridge defects at the bearing position.

[0003] Therefore, it is necessary to improve existing technologies. Summary of the Invention

[0004] The purpose of this invention is to propose a construction method for steel bearing plates in bridge engineering, in order to solve the problems of difficulty in controlling the bending quality of the main reinforcement in the existing technology of installing steel bearing plates, which leads to the presence of initial tensile stress in the weld, poor weld quality, difficulty in achieving the required flatness of the steel bearing plate, high welding difficulty, and low construction efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] The construction method for steel bearing plates in bridge engineering includes the following steps:

[0007] s1. Construction preparation;

[0008] This includes pre-processing the steel base plate, pre-processing the connectors, and pre-processing the main reinforcement bars;

[0009] The upper surface of the steel pad is symmetrically provided with two rows of stirrup installation grooves, and one side of the steel pad is provided with several main reinforcement installation grooves. A first thread is provided in a section of the inner wall of the main reinforcement installation groove near the groove opening.

[0010] The connector includes a sleeve, one end of which is provided with an annular protrusion, the outer wall of which is provided with a second thread, and the inner wall of which is provided with a third thread.

[0011] The outer wall of the main reinforcement bar is provided with a fourth threaded section, and the length of the fourth threaded section is greater than the depth of the main reinforcement bar installation groove.

[0012] s2. The steel pad is connected to the main reinforcement;

[0013] A connector is fitted onto each main reinforcement bar, and the connector is screwed to the non-threaded section. Then, the threaded section of each main reinforcement bar is inserted into the corresponding main reinforcement bar installation groove. Adhesive is filled into the gap between the main reinforcement bar and the main reinforcement bar installation groove. Then, the connector is screwed on, with the second thread connecting to the first thread and the third thread connecting to the fourth thread, until the sleeve is located in the main reinforcement bar installation groove and the annular protrusion is in close contact with the steel pad. Finally, wait for the adhesive to solidify.

[0014] s3. Steel pad is connected to stirrup;

[0015] Weld both ends of each stirrup to the corresponding stirrup mounting groove;

[0016] s4. Concrete pouring.

[0017] Preferably, in step s1, the pre-processing of the stirrup installation groove meets the following requirements:

[0018] The number of installation slots for each row of stirrups is the same as the number of stirrups;

[0019] The spacing between the installation slots of the two symmetrical rows of stirrups is the same as the distance between the two ends of the stirrups;

[0020] The spacing between two adjacent stirrup installation slots in each row is the same as the spacing between the corresponding two adjacent stirrups.

[0021] The axis of the stirrup installation groove is perpendicular to the steel pad.

[0022] Preferably, in step s1, the pre-processing of the main reinforcement mounting groove meets the following requirements:

[0023] The number of main reinforcement installation slots is the same as the number of main reinforcement bars;

[0024] The spacing between two adjacent main reinforcement installation slots is the same as the spacing between the corresponding two adjacent main reinforcements;

[0025] The axis of the main reinforcement installation groove is parallel to the steel pad plate;

[0026] The diameter of the hole in the main reinforcement installation groove is larger than the diameter of the main reinforcement.

[0027] Preferably, the diameter of the main reinforcement mounting groove is 4mm-8mm larger than the diameter of the main reinforcement.

[0028] Preferably, the outer diameter of the annular protrusion is larger than the inner diameter of the main rib mounting groove.

[0029] Preferably, the thickness of the steel pad is 3cm-4cm.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) The construction method of this invention does not require bending of the main reinforcement bars, reducing workload and construction difficulty. At the same time, it greatly reduces the amount of welding work, avoids bridge defects caused by welding quality problems, and reduces the waste of steel bars. In addition, the main reinforcement bar installation grooves on the steel plate are pre-processed, with good consistency. The main reinforcement bars are inserted into the main reinforcement bar installation grooves, making it easier to level the steel plate and control the construction quality. This solves the problem in the prior art that it is difficult to level the steel plate after the main reinforcement bars are welded to it.

[0032] (2) The construction method of the present invention uses adhesive and threaded connection between the steel pad and the main reinforcement, which has high connection strength, simple construction, high work efficiency, and high quality at the support position of the beam after forming. Attached Figure Description

[0033] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a cross-sectional view of the steel pad of the present invention.

[0035] Figure 2 This is a cross-sectional structural diagram of the connector of the present invention.

[0036] Figure 3 This is a structural diagram of the main reinforcing bars of the present invention.

[0037] Figure 4 This is a diagram of the stirrup structure of the present invention.

[0038] Figure 5 This is a schematic diagram of the connection between the steel pad and the main reinforcement of the present invention.

[0039] Figure 6 This is a front view of the steel pad of the present invention after installation.

[0040] Figure 7 This is a side view of the steel pad of the present invention after installation.

[0041] Figure 8 This is a top view of the steel pad of the present invention after installation.

[0042] In the diagram: 1. Steel pad; 2. Connector; 3. Main reinforcement; 4. Stirrup installation groove; 5. Stirrup; 6. Main reinforcement installation groove; 7. First thread; 8. Sleeve; 9. Annular protrusion; 10. Second thread; 11. Third thread; 12. Fourth thread; 13. Adhesive. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0044] Furthermore, in the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] A preferred embodiment of the present invention provides a construction method for steel bearing plates in bridge engineering, specifically including the following construction steps:

[0046] s1. Preparations before construction.

[0047] Specifically, this includes: pre-processing the steel base plate 1, pre-processing the connector 2, and pre-processing the main reinforcement 3.

[0048] like Figure 1 As shown, the steel base plate 1 is made of high-strength alloy material, has a square structure, and is generally 3cm-4cm thick. Two rows of stirrup mounting grooves 4 are symmetrically arranged on the upper surface of the steel base plate 1. When processing the stirrup mounting grooves 4, the following requirements must be met:

[0049] The number of stirrup installation slots 4 in each row is the same as the number of stirrups 5 at the steel pad installation position;

[0050] The spacing between the two symmetrical rows of stirrup installation slots 4 is the same as the distance between the two ends of the stirrup 5;

[0051] The spacing between two adjacent stirrup installation slots 4 in each row of stirrup installation slots 4 is the same as the spacing between two adjacent stirrups 5.

[0052] The depth of the stirrup installation groove 4 does not exceed the thickness of the steel pad 1, and the axis of the stirrup installation groove 4 is perpendicular to the steel pad 1.

[0053] Several main reinforcement mounting grooves 6 are provided on one side of the steel base plate 1. The main reinforcement mounting grooves 6 extend into the steel base plate 1, and a first thread 7 is provided on a section of the inner wall of the main reinforcement mounting groove 6 near the groove opening. When machining the main reinforcement mounting grooves 6, the following requirements must be met:

[0054] The number of main reinforcement installation slots 6 is the same as the number of main reinforcement 3 at the steel pad installation position;

[0055] The spacing between two adjacent main reinforcement installation slots 6 is the same as the spacing between two corresponding adjacent main reinforcements 3;

[0056] The depth of the main reinforcement installation groove 6 does not exceed the side length of the steel pad 1, and the axis of the main reinforcement installation groove 6 is parallel to the steel pad 1;

[0057] The diameter of the main reinforcement installation groove 6 is larger than the diameter of the main reinforcement 3. Specifically, the diameter of the main reinforcement installation groove 6 is 4mm-8mm larger than the diameter of the main reinforcement 3.

[0058] Among them, such as Figure 2 As shown, the connector 2 is made of stainless steel and includes a sleeve 8. An annular protrusion 9 is integrally formed at one end of the sleeve 8. The outer diameter of the annular protrusion 9 is larger than the inner diameter of the main reinforcement mounting groove 6. A second thread 10 is provided on the outer wall of the sleeve 8, and the first thread 7 on the inner wall of the main reinforcement mounting groove 6 is adapted to the second thread 10 on the outer wall of the sleeve 8. A third thread 11 is provided on the inner wall of the sleeve 8, and the third thread 11 on the inner wall of the sleeve 8 is adapted to the fourth thread 12 on the outer wall of the main reinforcement 3 (described below).

[0059] The processing of the steel pad 1 and the connecting parts 2 can be carried out in batches by a machining plant to produce finished prefabricated parts.

[0060] Among them, such as Figure 3 As shown, each main reinforcing bar 3 has a fourth thread 12 section on its outer wall, and the length of the fourth thread 12 section is greater than the depth of the main reinforcing bar installation groove 6.

[0061] s2. The steel pad 1 is fixedly connected to the main reinforcement 3.

[0062] like Figure 5 As shown, firstly, a connector 2 is fitted onto each main reinforcement 3. The connector 2 is threadedly connected to the threaded section of the main reinforcement 3. The connector 2 is then screwed onto the non-threaded section of the main reinforcement 3.

[0063] Then, insert the threaded section of each main rib 3 into the corresponding main rib mounting groove 6, and fill the gap between the main rib 3 and the main rib mounting groove 6 with adhesive 13 until the gap is filled with adhesive 13.

[0064] Then screw the connector 2, that is, the second thread 10 is threaded to the first thread 7, and at the same time, the third thread 11 is threaded to the fourth thread 12, until the sleeve 8 is located in the main reinforcement installation groove 6 and the annular protrusion 9 is in close contact with the steel pad 1. Finally, wait for the adhesive to solidify.

[0065] The connection between the steel base plate 1 and the main reinforcement 3 does not require welding, avoiding the problems of initial tensile stress and poor weld quality that are prone to occur in welds. Furthermore, the main reinforcement mounting grooves 6 on the steel base plate 1 are pre-fabricated, ensuring good consistency. The main reinforcement 3 are inserted into the mounting grooves 6, making it easier to level the steel base plate 1 and ensuring control over construction quality. This solves the problem of difficulty in leveling the steel base plate after welding the main reinforcement to it in existing technologies. In addition, the connection between the steel base plate 1 and the main reinforcement 3 uses adhesive and threaded connections, resulting in high connection strength, simple construction, and high work efficiency.

[0066] s3. Steel pad 1 is fixedly connected to stirrup 5;

[0067] like Figure 4 , Figures 6-8 As shown, the steel pad 1 is first leveled, and then the two ends of each stirrup 5 are welded to the corresponding stirrup installation groove 4.

[0068] s4. Concrete pouring.

[0069] After the concrete is poured, the upper surface of the steel pad 1 is embedded in the bridge bottom slab, and the lower surface of the steel pad 1 is exposed to provide a contact surface with high rigidity and high flatness for the rubber bearing.

[0070] In summary, the construction method for the bridge bearing steel pad described in this embodiment of the invention eliminates the need to bend the main reinforcement bars 3, reducing workload and construction difficulty. Simultaneously, it significantly reduces welding work, preventing bridge defects caused by welding quality issues and minimizing steel waste. Furthermore, the pre-processed main reinforcement bar installation grooves 6 on the steel pad 1 ensure good consistency. The main reinforcement bars 3 are inserted into these grooves, making it easier to level the steel pad 1 and ensuring control over construction quality. This solves the problem in existing technologies where leveling the steel pad after welding the main reinforcement bars to the steel pad is difficult.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A construction method for steel bearing plates in bridge engineering, characterized in that, The method specifically includes the following steps: s1. Construction preparation; This includes pre-processing the steel base plate, pre-processing the connectors, and pre-processing the main reinforcement bars; The upper surface of the steel pad is symmetrically provided with two rows of stirrup installation grooves, and one side of the steel pad is provided with several main reinforcement installation grooves. A first thread is provided in a section of the inner wall of the main reinforcement installation groove near the groove opening. The connector includes a sleeve, one end of which is provided with an annular protrusion, the outer wall of which is provided with a second thread, and the inner wall of which is provided with a third thread. The outer wall of the main reinforcement bar is provided with a fourth threaded section, and the length of the fourth threaded section is greater than the depth of the main reinforcement bar installation groove. s2. The steel pad is connected to the main reinforcement; A connector is fitted onto each main reinforcement bar, and the connector is screwed to the non-threaded section. Then, the threaded section of each main reinforcement bar is inserted into the corresponding main reinforcement bar installation groove. Adhesive is filled into the gap between the main reinforcement bar and the main reinforcement bar installation groove. Then, the connector is screwed on, with the second thread connecting to the first thread and the third thread connecting to the fourth thread, until the sleeve is located in the main reinforcement bar installation groove and the annular protrusion is in close contact with the steel pad. Finally, wait for the adhesive to solidify. s3. Steel pad is connected to stirrup; Weld both ends of each stirrup to the corresponding stirrup mounting groove; s4. Concrete pouring.

2. The construction method for bridge bearing steel pads according to claim 1, characterized in that, In step s1, the pre-processing of the stirrup installation groove shall meet the following requirements: The number of installation slots for each row of stirrups is the same as the number of stirrups; The spacing between the installation slots of the two symmetrical rows of stirrups is the same as the distance between the two ends of the stirrups; The spacing between two adjacent stirrup installation slots in each row is the same as the spacing between the corresponding two adjacent stirrups. The axis of the stirrup installation groove is perpendicular to the steel pad.

3. The construction method for bridge bearing steel pads according to claim 1, characterized in that, In step s1, the pre-processing of the main reinforcement installation groove meets the following requirements: The number of main reinforcement installation slots is the same as the number of main reinforcement bars; The spacing between two adjacent main reinforcement installation slots is the same as the spacing between the corresponding two adjacent main reinforcements; The axis of the main reinforcement installation groove is parallel to the steel pad plate; The diameter of the hole in the main reinforcement installation groove is larger than the diameter of the main reinforcement.

4. The construction method for bridge bearing steel pads according to claim 1, characterized in that, The diameter of the main reinforcement mounting groove is 4mm-8mm larger than the diameter of the main reinforcement.

5. The construction method for bridge bearing steel pads according to claim 1, characterized in that, The outer diameter of the annular protrusion is larger than the inner diameter of the main rib mounting groove.

6. The construction method for bridge bearing steel pads according to claim 1, characterized in that, The thickness of the steel pad is 3cm-4cm.

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