Longitudinal split prefabricated assembly type bent cap structure
Through the longitudinal segmented prefabricated assembled cover beam structure, the problems of difficulty in transportation, low mechanical performance and long construction period in the existing cover beam assembly technology are solved, rapid and economical construction of cover beams is achieved, and the mechanical properties of the structure are improved.
Patent Information
- Application Number
- CN202421342005.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The existing cover beam assembly technology has problems such as transportation and lifting difficulties, low mechanical properties, long construction period and high cost, which restricts the development of cover beam assembly construction.
The longitudinal piece prefabricated assembled cover beam structure is adopted, including columns, prefabricated cover beam components and cast-in-place cover beam components. The first and second prefabricated cover beam components are connected by L-shaped interlaced steel bars to form an intermediate wet joint section, and a cast-in-place cover beam component is set up therein.
该技术方案简化了盖梁的运输和吊装，降低了施工成本和工期，提高了盖梁的施工可行性和适应性，增强了结构的力学性能。
Smart Images
Figure CN222908524U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a bent cap structure, in particular to a longitudinally segmented precast and assembled bent cap structure. Background Technique
[0002] The bent cap is an important component connecting the upper and lower parts of a bridge, characterized by large stress, large size, and large weight, and has always been the focus of bridge design and construction. Urban viaducts are restricted by the cross-section form of the ground access road, requiring a large space under the bridge. Therefore, large cantilever bent caps or portal pier bent caps are commonly used. Due to the high requirements for spanning and load-bearing capacity of such bent caps, the cross-section size and weight of the bent cap are very large, and the transportation and hoisting difficulties of precast bent caps have always restricted the precast and assembled construction of bent caps.
[0003] At present, the main assembly technology adopted for bent caps in China is sectional construction. The existing connection forms of bent cap segments include transverse glue joint connection and transverse cast-in-place wet joint connection. The results of relevant experimental studies at home and abroad show that the mechanical properties of the glue joint connection of bent cap segments are lower than those of wet joints and cast-in-place joints, and it is generally located at unfavorable positions for bending and shear forces such as near the root of the bent cap cantilever, and the safety risk level of component stress is relatively high. For the construction of the wet joint connection of transverse sectional bent caps, scaffolds generally need to be set up on site, which has a great impact on the environment and traffic, a long construction period, and significantly reduces the social and economic benefits of assembled construction. The above problems have always restricted the development and popularization of the assembled construction of bent caps, and the lightweight technology of precast bent cap components has become an urgent problem to be studied and solved. Content of the Utility Model
[0004] The technical problem to be solved by the utility model is to provide a longitudinally segmented precast and assembled bent cap structure, which can not only meet the feasibility and adaptability of bent cap construction under different scenarios, but also facilitate on-site splicing construction, saving construction period and cost.
[0005] The technical solution adopted by the utility model to solve the above technical problem is to provide a longitudinally segmented precast and assembled bent cap structure, including columns, precast bent cap components, and cast-in-place bent cap components. The precast bent cap components are installed on the columns. The bottom of the precast bent cap components is provided with a precast bent cap bottom plate, and the two sides of the precast bent cap components are provided with precast bent cap side plates. Among them, the precast bent cap components include a first precast bent cap component and a second precast bent cap component spliced longitudinally. The first precast bent cap component and the second precast bent cap component are connected by L-shaped staggered overlapping steel bars to form an intermediate wet joint section as a post-cast strip, and the cast-in-place bent cap components are arranged in the intermediate wet joint section.
[0006] In the above longitudinally segmented precast and assembled bent cap structure, the width of the intermediate wet joint section between the first precast bent cap component and the second precast bent cap component is 50 cm.
[0007] The above-mentioned longitudinally segmented prefabricated and assembled capping beam structure, wherein the first prefabricated capping beam member is provided with a bottom plate as the bottom formwork for the cast-in-place concrete, and the first prefabricated capping beam member is provided with side plates as the side formworks for the cast-in-place concrete.
[0008] The above-mentioned longitudinally segmented prefabricated and assembled capping beam structure, wherein core concrete reinforcement bars are arranged in the first prefabricated capping beam member and the second prefabricated capping beam member.
[0009] The utility model has the following beneficial effects compared with the prior art: The longitudinally segmented prefabricated and assembled capping beam structure provided by the utility model comprehensively considers the transportation and on-site erection conditions of large-tonnage capping beams, and proposes a prefabricated and assembled capping beam solution of longitudinal segmentation and prefabrication, which can facilitate on-site splicing construction to meet the construction feasibility and adaptability of capping beams under different scenario requirements; it saves the construction period and reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 is a schematic elevation structure diagram of the longitudinally segmented prefabricated and assembled capping beam structure of the utility model;
[0011] Figure 2 is a schematic plan structure diagram of the longitudinally segmented prefabricated and assembled capping beam structure of the utility model;
[0012] Figure 3a is a schematic structure diagram of the prefabricated capping beam member of the utility model before splicing;
[0013] Figure 3b is a schematic structure diagram of the prefabricated capping beam member of the utility model after splicing;
[0014] Figure 4 is a schematic diagram of the reinforcement connection in the wet joint of the prefabricated capping beam of the utility model.
[0015] The marks in the figure are:
[0016] 1, column; 2, prefabricated capping beam component; 3, prefabricated capping beam bottom plate; 4, prefabricated capping beam side plate; 5, first prefabricated capping beam member; 6, second prefabricated capping beam member; 7, cast-in-place capping beam component; 8, L-shaped staggered lap reinforcement; 9, core concrete reinforcement bar. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The following further describes the utility model with reference to the drawings and embodiments.
[0018] Figure 1 is a schematic elevation structure diagram of the longitudinally segmented prefabricated and assembled capping beam structure of the utility model; Figure 2 is a schematic plan structure diagram of the longitudinally segmented prefabricated and assembled capping beam structure of the utility model.
[0019] Please refer to Figure 1and Figure 2 For the longitudinal segmental precast and assembled capping beam structure provided by the present utility model, it includes a column 1, a precast capping beam component 2 and a cast-in-place capping beam component 7. The precast capping beam component 2 is installed on the column 1. A precast capping beam bottom plate 3 is arranged at the bottom of the precast capping beam component 2, and precast capping beam side plates 4 are arranged on both sides of the precast capping beam component 2. Among them, the precast capping beam component 2 includes a first precast capping beam member 5 and a second precast capping beam member 6 spliced longitudinally. A reliable connection is formed between the first precast capping beam member 5 and the second precast capping beam member 6 through L-shaped staggered lapping steel bars 8, and an intermediate wet joint section is formed as a post-cast strip. The cast-in-place capping beam component 7 is arranged in the intermediate wet joint section.
[0020] For the longitudinal segmental precast and assembled capping beam structure provided by the present utility model, the width of the intermediate wet joint section between the first precast capping beam member 5 and the second precast capping beam member 6 is 50 cm, forming the integral capping beam stress; the segmental precast capping beam members before and after splicing are as Figure 3a and Figure 3b shown.
[0021] For the longitudinal segmental precast and assembled capping beam structure provided by the present utility model, the first precast capping beam member 5 is provided with a bottom plate as the bottom formwork of the cast-in-place capping beam component 7, and the first precast capping beam member 5 is provided with side plates as the side formwork of the cast-in-place capping beam component 7.
[0022] For the longitudinal segmental precast and assembled capping beam structure provided by the present utility model, core concrete reinforcement bars 9 are arranged in the first precast capping beam member 5 and the second precast capping beam member 6, as Figure 4 shown. Prestressed steel tendons are all arranged in the first precast capping beam member 5 and the second precast capping beam member 6, and the steel tendons are threaded in the factory, canceling the on-site tendon threading work; it has the following advantages:
[0023] 1. Segmentally precasting in the longitudinal direction of the bridge can reduce the transportation and hoisting weight of the capping beam to less than 50%, basically meeting the construction conditions of most highway and urban bridge capping beams in China;
[0024] 2. The segmental precasting of the capping beam can be precast synchronously, with good economy;
[0025] 3. After assembly, no formwork needs to be set for the cast-in-place joints between segments, saving the construction period and reducing the cost;
[0026] 4. The segmental erection of the capping beam can form a structural system at one time, without the need to erect supports, and the ground traffic can be opened, saving costs and having significant social and economic benefits.
[0027] 5. The longitudinal segmental connection method can be used for both overweight large cantilever capping beams and overweight gantry pier capping beams.
[0028] Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to that defined by the claims.
Claims
1. A longitudinally segmented prefabricated assembled cap beam structure, comprising a column (1), a cap beam prefabricated component (2) and a cap beam cast-in-place component (7), wherein the cap beam prefabricated component (2) is mounted on the column (1), a prefabricated cap beam bottom plate (3) is provided at the bottom of the cap beam prefabricated component (2), and prefabricated cap beam side plates (4) are provided on both sides of the cap beam prefabricated component (2); characterized in that: The cap beam prefabricated component (2) comprises a first prefabricated cap beam component (5) and a second prefabricated cap beam component (6) which are spliced in the longitudinal direction; the first prefabricated cap beam component (5) and the second prefabricated cap beam component (6) are connected by L-shaped staggered lap steel bars (8) to form an intermediate wet joint section as a post-cast strip; and the cap beam cast-in-place component (7) is arranged in the intermediate wet joint section.
2. The longitudinally segmented prefabricated assembled cap beam structure according to claim 1 is characterized in that: The width of the middle wet joint section between the first prefabricated cap beam component (5) and the second prefabricated cap beam component (6) is 50 cm.
3. The longitudinally segmented prefabricated assembled cap beam structure according to claim 1 is characterized in that: The first prefabricated cap beam component (5) is provided with a bottom plate as a bottom formwork for post-cast concrete, and the first prefabricated cap beam component (5) is provided with a side plate as a side formwork for post-cast concrete.
4. The longitudinally segmented prefabricated assembled cap beam structure according to claim 1 is characterized in that: The first prefabricated cap beam component (5) and the second prefabricated cap beam component (6) are provided with core concrete reinforcing steel bars (9).