Prefabricated assembly type bent cap
By lapping or welding the vertical main bars of the pier column in the prefabricated cover beam, combined with the design of post-pouring joints, the problem of insufficient seismic resistance of the prefabricated cover beam in high-intensity earthquake areas is solved, and efficient construction and structural stability are achieved.
Patent Information
- Application Number
- CN202422371645.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The existing prefabricated cover beam structure has limited seismic resistance in high-intensity seismic areas, resulting in limited application in such areas.
A prefabricated assembled cover beam is designed, which includes multiple inverted U-shaped steel bars embedded in the body of the cover beam. Each steel bar consists of a transverse steel bar section and two side limb sections. The transverse steel bar section is located at the top of the pier column bearing socket, and the side limb section extends downward and extends out of the bottom of the cover beam. There is a pier column bearing socket and a vertical hole at the bottom of the cover beam. It is overlapped or welded with the longitudinal main bar of the pier column through the inverted U-shaped steel bar, and combined with the rear pouring joint design to enhance the connection strength.
The connection stability between the cover beam and pier column and the seismic resistance of the overall structure are improved, the construction period is shortened, the project volume is reduced, and local stress concentration is avoided by evenly laying steel bars, which enhances the load bearing capacity.
Smart Images
Figure CN223088263U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge engineering, in particular to a prefabricated and assembled cap beam. Background Art
[0002] Prefabricated and assembled bridges are beneficial to improving the quality of components, shortening the construction period, and reducing carbon emissions, and are an important direction for the green construction of bridges.
[0003] As an important load-bearing component in the bridge structure, the main function of the cap beam is to support the upper structure of the bridge and transfer all loads to the pier column. The precast cap beam is usually processed and assembled in a factory or prefabrication site, and then concrete is poured and cured to a certain strength, and then transported to the construction site for hoisting.
[0004] When the conventional precast cap beam is assembled with the lower precast pier column, usually the top reinforcement bars of the precast pier column are inserted into the corrugated pipes of the precast cap beam one by one, and then the connection between the two is realized through grouting. The top of the pier column and the bottom of the cap beam adopt grouting mortar. This structural form has limited seismic resistance in the joint area. Therefore, in high-intensity earthquake areas, precast bridge piers have to be used with caution or even abandoned.
[0005] In view of this, it is necessary to propose a prefabricated and assembled cap beam to solve or at least alleviate the above defects. Summary of the Utility Model
[0006] The main purpose of the utility model is to provide a prefabricated and assembled cap beam to solve the technical problem of how to improve the seismic resistance of the existing precast cap beam structure.
[0007] To achieve the above purpose, the utility model provides a prefabricated and assembled cap beam, which includes a cap beam body. A pier column socket for butt-jointing the pier column is recessed upward at the bottom of the cap beam body. A vertical hole communicating with the pier column socket is opened at the top of the cap beam body. A plurality of inverted U-shaped steel bars surrounding the pier column socket are embedded in the cap beam body. Each inverted U-shaped steel bar includes a horizontal steel bar section arranged at the top of the pier column socket and two side limb sections respectively arranged on both sides of the horizontal steel bar section. Each side limb section extends downward from the horizontal steel bar section and extends out of the bottom of the cap beam body.
[0008] Preferably, each side limb section includes a side limb extending section, a vertical steel bar joint embedded in the cap beam body, and a side limb embedded section. The side limb embedded section is connected to the vertical steel bar joint and extends upward to be connected to the horizontal steel bar section. The side limb extending section is detachably connected to the vertical steel bar joint and extends downward outside the cap beam body.
[0009] Preferably, the bottom surface of the vertical steel bar joint is flush with the bottom surface of the cap beam body.
[0010] Preferably, the capping beam body includes a first capping beam body and a second capping beam body arranged in sequence along the transverse direction of the bridge, and the first capping beam body and the second capping beam body are connected by a post-cast joint.
[0011] Preferably, the first capping beam body is provided with first connecting steel bars, and the first connecting steel bars include a first embedded section and a first connecting section. The first embedded section is embedded in the first capping beam body, and the first connecting section extends outward from the first embedded section into the post-cast joint;
[0012] The second capping beam body is provided with second connecting steel bars, and the second connecting steel bars include a second embedded section and a second connecting section. The second embedded section is embedded in the second capping beam body, and the second connecting section extends outward from the second embedded section into the post-cast joint.
[0013] Preferably, the first connecting section and the second connecting section are lapped or spot-welded.
[0014] Preferably, a first transverse steel bar joint is embedded in the first capping beam body. The first embedded section is connected to the inner side of the first transverse steel bar joint, and the first connecting section is detachably connected to the outer side of the first transverse steel bar joint;
[0015] A second transverse steel bar joint is embedded in the second capping beam body. The second embedded section is connected to the inner side of the second transverse steel bar joint, and the second connecting section is detachably connected to the outer side of the second transverse steel bar joint.
[0016] Preferably, multiple inverted U-shaped steel bars are evenly spaced around the pier column socket.
[0017] Compared with the prior art, the utility model has the following beneficial effects:
[0018] The utility model provides a prefabricated and assembled capping beam, including a capping beam body. The bottom of the capping beam body is recessed upward to form a pier column socket for butt-jointing the pier column. The top of the capping beam body is provided with a vertical hole communicating with the pier column socket. Multiple inverted U-shaped steel bars are embedded in the capping beam body around the pier column socket. Each inverted U-shaped steel bar includes a transverse steel bar section arranged at the top of the pier column socket and two side limb sections respectively arranged on both sides of the transverse steel bar section. Wherein, each side limb section extends downward from the transverse steel bar section and extends out of the bottom of the capping beam body. The prefabricated and assembled capping beam provided by this application has better seismic resistance. Through the prefabricated and assembled capping beam of this application, prefabrication and assembly with the pier column can be realized, the construction efficiency is improved, the construction period is shortened, and the engineering quantity is reduced. Description of the Drawings
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;
[0021] Figure 2 for Figure 1 A is an enlarged schematic diagram;
[0022] Figure 3 It is a schematic diagram of the structure after the overall structure and the pier column are connected in one embodiment of the utility model.
[0023] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.
[0024] Description of Figure Numbers:
[0025] 10. Cap beam body; 110. Pier column socket; 120. Vertical hole; 130. Inverted U-shaped steel bar; 131. Transverse steel bar segment; 132. Side limb segment; 1321. Side limb extension segment; 1322. Side limb embedded segment; 140. Vertical steel bar joint; 150. First cap beam body; 151. First connecting steel bar; 1511. First embedded segment; 1512. First connecting segment; 1513. First transverse steel bar joint; 160. Second cap beam body; 161. Second connecting steel bar; 1611. Second embedded segment; 1612. Second connecting segment; 1613. Second transverse steel bar joint; 170. Post-cast joint; 20. Pier; 210. Pier column longitudinal main reinforcement; 30. Tubular structure layer. DETAILED DESCRIPTION
[0026] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as described in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0029] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0030] See also Figures 1 to 3 A prefabricated assembled cap beam in one embodiment of the utility model includes a cap beam body 10, wherein the bottom of the cap beam body 10 is upwardly recessed with a pier socket 110 for docking with a pier 20, and the top of the cap beam body 10 is provided with a vertical hole 120 connected to the pier socket 110, and a plurality of inverted U-shaped steel bars 130 surrounding the pier socket 110 are pre-embedded in the cap beam body 10, and each of the inverted U-shaped steel bars 130 includes a transverse steel bar segment 131 arranged at the top of the pier socket 110 and two side limb segments 132 respectively arranged on both sides of the transverse steel bar segment 131, wherein each of the side limb segments 132 extends downward from the transverse steel bar segment 131 and extends out of the bottom of the cap beam body 10.
[0031] In the present application, the cap beam body 10 is produced in a prefabricated manner, which reduces the complexity and time cost of on-site construction. The pier socket 110 is recessed upward at the bottom of the cap beam body 10, which is used to dock with the bridge pier 20. This design realizes a quick and stable connection between the cap beam and the pier 20, and improves the construction efficiency. Each inverted U-shaped steel bar 130 is composed of a transverse steel bar segment 131 and two side limb segments 132. The transverse steel bar segment 131 is located at the top of the pier socket 110, which enhances the horizontal shear resistance of the area; the two side limb segments 132 extend downward from the transverse steel bar segment 131 and extend out of the bottom of the cap beam body 10, and can be overlapped or welded with the longitudinal main reinforcement of the pier 20, thereby further improving the stability and bearing capacity of the overall structure, and thus improving the seismic resistance of the prefabricated cap beam.
[0032] As a preferred embodiment, each of the side limb segments 132 includes a side limb extending segment 1321, a vertical steel bar joint 140 embedded in the capping beam body 10, and a side limb embedded segment 1322. The side limb embedded segment 1322 is connected to the vertical steel bar joint 140 and extends upward to be connected to the transverse steel bar segment 131. The side limb extending segment 1321 is detachably connected to the vertical steel bar joint 140 and extends downward beyond the capping beam body 10.
[0033] Specifically, as Figure 1 shown, each inverted U-shaped steel bar 130 includes a transverse steel bar segment 131 and two side limb segments 132. The transverse steel bar segment 131 is disposed at the top of the pier column socket 110 and is embedded in the capping beam body 10, playing a role in connection and support. The two side limb segments 132 are respectively disposed on both sides of the pier column socket 110, extending downward from the transverse steel bar segment 131 and protruding from the bottom of the capping beam body 10, and can be lapped or spot-welded to the longitudinal main steel bars 210 of the pier column 20. The inverted U-shaped steel bar 130 can play a dual role of connection and punching shear resistance. The inverted U-shaped steel bar 130 and the longitudinal main steel bars 210 of the pier column do not need to correspond one by one, only the axes need to be aligned, with a large installation tolerance, reliable force transmission, and improved seismic capacity of the overall structure.
[0034] In addition, during the concrete pouring process, concrete can be poured into the pouring space formed between the pier column socket 110 and the pier column 20 through the vertical holes 120, thereby forming a tubular structure layer 30 to achieve grouting connection. Additionally, air bubbles will be generated inside the concrete, and the existence of the vertical holes 120 provides an effective discharge channel for these air bubbles, helping to reduce the air bubble content inside the concrete, improve the density and strength of the concrete, and achieve dual use of one hole.
[0035] Furthermore, the bottom surface of the vertical steel bar joint 140 is flush with the bottom surface of the capping beam body 10.
[0036] As a preferred embodiment, the capping beam body 10 includes a first capping beam body 150 and a second capping beam body 160 arranged in sequence along the transverse bridge direction. The first capping beam body 150 and the second capping beam body 160 are connected by a post-cast joint 170. The connection between the first capping beam body 150 and the second capping beam body 160 through the post-cast joint 170 forms a continuous integral structure, which not only realizes the connection between the first capping beam body 150 and the second capping beam body 160, but also effectively improves the strength of the overall structure.
[0037] As a preferred embodiment, the first cap beam body 150 is provided with a first connecting steel bar 151, the first connecting steel bar 151 includes a first embedded section 1511 and a first connecting section 1512, the first embedded section 1511 is embedded in the first cap beam body 150, and the first connecting section 1512 extends outward from the first embedded section 1511 to the post-cast joint 170;
[0038] The second cap beam body 160 is provided with a second connecting steel bar 161, and the second connecting steel bar 161 includes a second embedded section 1611 and a second connecting section 1612. The second embedded section 1611 is embedded in the second cap beam body 160, and the second connecting section 1612 extends outward from the second embedded section 1611 to the post-cast joint 170.
[0039] Specifically, the design of the first connecting steel bar 151 and the second connecting steel bar 161 adopts a combination of an embedded section and a connecting section. The embedded section is embedded in the cap beam body 10, and the connecting section extends to the post-cast joint 170. After the post-cast concrete is poured and solidified, the two cap beam bodies 10 are firmly connected together, which significantly enhances the connection strength of the structure and improves the seismic resistance of the prefabricated cap beam.
[0040] Furthermore, the first connection section 1512 and the second connection section 1612 are overlapped or spot-welded. It is worth noting that the first connection section 1512 and the second connection section 1612 are overlapped or spot-welded. When subjected to a small external force, the overlap or spot-welding connection of the first connection section 1512 and the second connection section 1612 can improve the overall structural strength to a certain extent. When subjected to a large external force, the first connection section 1512 and the second connection section 1612 will be staggered or disconnected, thereby actively weakening the structural strength of the post-cast joint 170, so that the position of the post-cast joint 170 is damaged first, thereby achieving step-by-step control of the damaged area.
[0041] As a preferred embodiment, a first transverse steel bar joint 1513 is pre-embedded in the first cap beam body 150, the first pre-embedded section 1511 is connected to the inner side of the first transverse steel bar joint 1513, and the first connecting section 1512 is detachably connected to the outer side of the first transverse steel bar joint 1513; a second transverse steel bar joint 1613 is pre-embedded in the second cap beam body 160, the second pre-embedded section 1611 is connected to the inner side of the second transverse steel bar joint 1613, and the second connecting section 1612 is detachably connected to the outer side of the second transverse steel bar joint 1613.
[0042] Preferably, the first transverse steel bar joint 1513 and the second transverse steel bar joint 1613 can be steel bar joints with internal threads, and external threads matching the internal threads of the steel bar joints can be provided on the outer peripheral walls of the first connecting section 1512 and the second connecting section 1612, so as to achieve detachable connections between the first connecting section 1512 and the first transverse steel bar joint 1513, and between the second connecting section 1612 and the second transverse steel bar joint 1613. Through the detachable connection method, if the post-cast joint 170 or the internal first connecting section 1512 or the second connecting section 1612 is damaged or deformed too much under the action of external forces such as earthquakes, the corresponding post-cast joint 170 can be chiseled out, the first connecting section 1512 or the second connecting section 1612 can be screwed out, then the first connecting section 1512 or the second connecting section 1612 that meets the requirements can be installed, and the post-cast joint 170 can be re-cast to complete the replacement and repair.
[0043] In addition, existing precast capping beams usually adopt integral hoisting, which has a large hoisting weight and high requirements for transportation conditions. When the hoisting weight is above the ultimate bearing capacity of the hoisting equipment, segmental prefabrication and on-site post-cast joints are usually adopted. However, the self-stability of the segmented capping beam is poor, and additional fixing devices need to be set. The post-cast joint 170 and the precast capping beam are set with equal strength, forming a rigid frame with the pier column and the tie beam, unable to consume seismic energy, and there is a risk of brittle failure.
[0044] Preferably, the post-cast joint 170 of the embodiment of the present application can adopt ductile concrete, combined with the lapping or spot welding connection of the first connecting section 1512 and the second connecting section 1612. When subjected to small external forces, the lapping or spot welding connection of the first connecting section 1512 and the second connecting section 1612 can improve the overall structural strength to a certain extent and consume seismic energy to a certain extent. When subjected to large external forces, the first connecting section 1512 and the second connecting section 1612 will be staggered or disconnected, thereby actively weakening the structural strength of the post-cast joint 170, making the position of the post-cast joint 170 damaged first, so as to achieve controllable damage area grading.
[0045] Furthermore, multiple inverted U-shaped steel bars 130 are arranged around the pier column socket 110 at uniform intervals. The arrangement at uniform intervals ensures that the steel bars form uniform supports around the pier column socket 110, avoiding local stress concentration and further enhancing the bearing capacity and seismic resistance of the structure. In other embodiments, the arrangement of the multiple inverted U-shaped steel bars 130 can also be set according to actual needs.
[0046] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.
Claims
1. A prefabricated and assembled capping beam, comprising a capping beam body, characterized in that, The bottom of the capping beam body is recessed upward to form a pier column socket for docking with the pier column. A vertical hole communicating with the pier column socket is opened at the top of the capping beam body. Multiple inverted U-shaped steel bars surrounding the pier column socket are embedded in the capping beam body. Each inverted U-shaped steel bar includes a horizontal steel bar section arranged at the top of the pier column socket and two side limb sections respectively arranged on both sides of the horizontal steel bar section. Wherein, each side limb section extends downward from the horizontal steel bar section and extends out of the bottom of the capping beam body.
2. The prefabricated and assembled capping beam according to claim 1, wherein Each side limb section includes a side limb extension section, a vertical steel bar joint embedded in the capping beam body, and a side limb embedded section. The side limb embedded section is connected to the vertical steel bar joint and extends upward to be connected to the horizontal steel bar section. The side limb extension section is detachably connected to the vertical steel bar joint and extends downward outside the capping beam body.
3. The prefabricated and assembled capping beam according to claim 2, wherein, The bottom surface of the vertical steel bar joint is flush with the bottom surface of the capping beam body.
4. The prefabricated and assembled capping beam according to claim 1, wherein, The capping beam body includes a first capping beam body and a second capping beam body arranged in sequence along the transverse direction of the bridge. The first capping beam body and the second capping beam body are connected by a post-cast joint.
5. The prefabricated and assembled capping beam according to claim 4, wherein, The first capping beam body is provided with a first connecting steel bar. The first connecting steel bar includes a first embedded section and a first connecting section. The first embedded section is embedded in the first capping beam body. The first connecting section extends outward from the first embedded section into the post-cast joint. The second capping beam body is provided with a second connecting steel bar. The second connecting steel bar includes a second embedded section and a second connecting section. The second embedded section is embedded in the second capping beam body. The second connecting section extends outward from the second embedded section into the post-cast joint.
6. The prefabricated and assembled capping beam according to claim 5, wherein, The first connecting section and the second connecting section are lapped or spot-welded.
7. The prefabricated and assembled coping beam according to claim 5, characterized in that, A first horizontal steel bar joint is embedded in the first capping beam body. The first embedded section is connected to the inner side of the first horizontal steel bar joint. The first connecting section is detachably connected to the outer side of the first horizontal steel bar joint. A second horizontal steel bar joint is embedded in the second capping beam body. The second embedded section is connected to the inner side of the second horizontal steel bar joint. The second connecting section is detachably connected to the outer side of the second horizontal steel bar joint.
8. The prefabricated and assembled capping beam according to claim 1, wherein Multiple inverted U-shaped steel bars are arranged around the pier column socket at uniform intervals.