UHPC fabricated box culvert structure

Abstract

The utility model discloses a UHPC (Ultra High Performance Concrete) assembly type box culvert structure, which belongs to the technical field of box culvert structures and comprises a prefabricated box culvert, the prefabricated box culvert comprises a front-end box culvert, a tail-end box culvert and a plurality of groups of middle box culverts, a bottom plate is arranged at the bottom of the prefabricated box culvert, and a guide groove is formed in one end, close to the middle box culverts, of the front-end box culvert. A guide protrusion is arranged at the end, close to the middle box culvert, of the tail end box culvert, the periphery of the outer wall of the guide protrusion is coated with silicone sealant, and the guide protrusion and the guide groove are arranged at the two ends of the middle box culvert respectively. Connecting structures are arranged among the front-end box culvert, the middle box culvert and the tail-end box culvert, the two ends of each connecting structure penetrate through the corresponding guide protrusion and the corresponding guide groove correspondingly, a plurality of sets of U-shaped connecting pieces are arranged on the inner wall of the prefabricated box culvert, and the connecting structures penetrate through the U-shaped connecting pieces. According to the UHPC assembly type box culvert structure, the waterproof effect and the connecting strength are effectively improved, and high efficiency and convenient installation are achieved.

Description

Technical Field

[0001] This utility model relates to the field of box culvert structure technology, and in particular to a UHPC prefabricated box culvert structure. Background Technology

[0002] Box culverts are common structures in highway engineering that cross underpasses, rivers, and other structures. They serve to ensure the normal passage of pedestrians and vehicles and the crossing of water below. Due to their stable structural performance and low cost, they are widely used in highway, municipal road, and ordinary road engineering projects.

[0003] Traditional prefabricated concrete box culverts are heavy, have low transportation efficiency, and the gaps between the box culverts are filled with asphalt lint material, resulting in poor waterproofing and low connection strength. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a UHPC prefabricated box culvert structure that effectively improves waterproofing and connection strength, and achieves high efficiency and convenient installation.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model provides a UHPC prefabricated box culvert structure, including a prefabricated box culvert. Lifting rings are evenly arranged around the top perimeter of the prefabricated box culvert. The prefabricated box culvert includes a front box culvert, a rear box culvert, and several sets of intermediate box culverts. A bottom plate is provided at the bottom of the prefabricated box culvert. A guide groove is provided at the end of the front box culvert near the intermediate box culvert. A guide protrusion is provided at the end of the rear box culvert near the intermediate box culvert. The outer wall of the guide protrusion is coated with silicone sealant. The guide protrusion is adapted to the guide groove. The guide protrusion and guide groove are respectively provided at both ends of the intermediate box culvert.

[0007] A connecting structure is provided between the front box culvert, the middle box culvert and the tail box culvert. The two ends of the connecting structure pass through the guide protrusion and the guide groove respectively, and are used to connect the two sets of prefabricated box culverts. Several sets of U-shaped connectors are provided on the inner wall of the prefabricated box culverts, and the connecting structure passes through the U-shaped connectors.

[0008] The preferred technical solution of this utility model is that at least three sets of connecting grooves are provided at the mounting end of the guide protrusion and the guide groove, the three sets of connecting grooves are arranged on three sides away from the bottom plate, a guide plate is provided on the connecting groove, and a mounting hole is provided on the guide plate.

[0009] The preferred technical solution of this utility model is that a through groove is opened at the bottom of the precast box culvert, and several sets of reserved steel bars are evenly distributed at the bottom of the precast box culvert, and a bottom plate is formed by on-site casting of UHPC.

[0010] The preferred technical solution of this utility model is that the connecting structure includes a connecting frame, the connecting frame is I-shaped, the two ends of the connecting frame are respectively clamped to the guide plates of two sets of precast box culverts, the connecting frame is provided with two sets of connecting holes, the connecting holes are adapted to the mounting holes, and fastening bolts are provided between the connecting holes and the mounting holes.

[0011] The preferred technical solution of this utility model is that the U-shaped connector is correspondingly disposed on the side near the guide plate, and the groove of the U-shaped connector is adapted to the lateral end of the bottom of the connecting frame.

[0012] A preferred embodiment of this utility model is that the guide plate has a groove on the side near the connecting frame that matches the vertical end of the connecting frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model uses UHPC material with excellent properties such as high strength, high tensile strength, and high durability to prefabricate precast box culverts, which solves the defects of traditional ordinary concrete box culverts such as heavy structure, easy breakage of edges and corners, low transportation efficiency, and poor corrosion resistance.

[0015] 2. This utility model uses silicone sealant to connect the gaps between precast box culverts, replacing asphalt lint filling material. It has advantages such as low cost, high efficiency of on-site gap splicing construction, good ductility, and excellent waterproof performance. At the same time, it is equipped with a connecting structure and U-shaped connectors, which can quickly realize the splicing between two sets of precast box culverts. It can achieve fast and high-precision installation on site, ensuring the convenience of installation, improving transportation efficiency and on-site construction efficiency, and effectively shortening the construction period. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the intermediate box culvert installation structure provided in a specific embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the prefabricated box culvert structure provided in a specific embodiment of this utility model;

[0018] Figure 3 This is a cross-sectional view of the intermediate box culvert structure provided in a specific embodiment of this utility model.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Front box culvert; 2. Intermediate box culvert; 21. Connecting groove; 22. Mounting hole; 23. Guide plate; 24. Guide protrusion; 25. Guide groove; 26. Lifting ring; 3. Tail box culvert; 4. Bottom plate; 41. Reserved steel bar; 5. Connecting structure; 51. Connecting frame; 52. Connecting hole; 53. Fastening bolt; 6. U-shaped connector. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] A UHPC prefabricated box culvert structure includes a prefabricated box culvert. Lifting rings 26 are evenly arranged around the top perimeter of the prefabricated box culvert. The prefabricated box culvert includes a front box culvert 1, a rear box culvert 3, and several sets of intermediate box culverts 2. A bottom plate 4 is provided at the bottom of the prefabricated box culvert. A guide groove 25 is provided at the end of the front box culvert 1 near the intermediate box culvert 2. A guide protrusion 24 is provided at the end of the rear box culvert 3 near the intermediate box culvert 2. The outer wall of the guide protrusion 24 is coated with silicone sealant. The guide protrusion 24 is adapted to the guide groove 25. The guide protrusion 24 and the guide groove 25 are respectively located at both ends of the intermediate box culvert 2.

[0023] A connecting structure 5 is provided between the front box culvert 1, the middle box culvert 2 and the tail box culvert 3. The two ends of the connecting structure 5 pass through the guide protrusion 24 and the guide groove 25 respectively, and are used to connect the two sets of prefabricated box culverts. Several sets of U-shaped connectors 6 are provided on the inner wall of the prefabricated box culvert, and the connecting structure 5 passes through the U-shaped connectors 6.

[0024] The front box culvert 1, the middle box culvert 2, and the tail box culvert 3 are prefabricated using UHPC material, which has excellent properties such as high strength, high tensile strength, and high durability. This can solve the defects of traditional ordinary concrete box culverts, such as being heavy, having easily broken edges and corners, low transportation efficiency, and poor corrosion resistance. After the prefabricated box culverts are transported to the site, the base layer is leveled with concrete. The positioning line is marked by a chalk line. Several tubular steel bars are inserted at a distance (half the diameter of the tubular steel bar) outside the center line of the chalk line at the front end and left end of the front box culvert 1 for installation and positioning. The front box culvert 1 is gradually and slowly installed to the designated position using hoisting equipment and lifting ring 26. The tubular steel bars are then gradually fine-tuned to the correct position. The connecting structure 5 is installed at the guide groove 25 of the front box culvert 1.

[0025] Under the action of hoisting equipment, intermediate box culvert 2, with the front box culvert 1 as the reference, has several steel bars with tube wheels inserted at certain positions (half the diameter of the tube wheel steel bars) on the left or right end of the corresponding position of the chalk line of intermediate box culvert 2 for lateral positioning. At the same time, several steel bars are inserted at the corresponding position of the front side wall of intermediate box culvert 2 in the installation direction as the force points for the jack to push back. Silicone sealant is evenly coated around the tongue and groove of the guide protrusion 24. After intermediate box culvert 2 is initially positioned, it is pushed along the direction of the front box culvert 1 by jacks, so that the guide protrusion 24 of intermediate box culvert 2 and the front box culvert 1 are aligned. The guide groove 25 of culvert 1 is installed accordingly, and the guide protrusion 24 is embedded in the connecting structure 5 and fixed to ensure that the overlap tongue and groove gap is small and the silicone sealant is evenly connected, thus ensuring the integrity and waterproofing purpose. Similarly, the installation of the subsequent intermediate box culvert 2 and tail box culvert 3 is also carried out in the same way. Silicone sealant is used instead of asphalt lint to fill the gaps, which has the advantages of low cost, high efficiency of on-site gap splicing construction, good ductility, and good waterproof performance. Through the prefabricated box culvert, the installation can be carried out quickly and with high precision on site, ensuring the convenience of installation, improving transportation efficiency and on-site construction efficiency, and effectively shortening the construction period.

[0026] As a possible implementation of this solution, preferably, at least three sets of connecting grooves 21 are provided at the installation ends of the guide protrusion 24 and the guide groove 25. The three sets of connecting grooves 21 are arranged on three sides away from the bottom plate 4. A guide plate 23 is provided on the connecting groove 21. The guide plate 23 is provided with mounting holes 22. The connecting structure 5 is installed on the guide plate 23 of the guide protrusion 24. When splicing the precast box culvert, the guide protrusion 24 and the guide groove 25 are adapted to each other, so that the connecting structure 5 can connect the two sets of precast box culverts, thereby improving the connection strength and waterproof performance between the precast box culverts and ensuring the on-site construction effect.

[0027] As a possible implementation of this solution, preferably, the bottom of the precast box culvert is provided with a through groove, and several sets of reserved steel bars 41 are evenly distributed at the bottom of the precast box culvert. The bottom plate 4 is formed by casting UHPC on site. The bottom plate 4 is formed by casting the reserved steel bars 41 and the on-site concrete. This can increase the integrity of the precast box culvert and the foundation, and at the same time reduce the weight of transportation and hoisting.

[0028] As a possible implementation of this solution, preferably, the connecting structure 5 includes a connecting frame 51, which is I-shaped. The two ends of the connecting frame 51 are respectively clamped to the guide plates 23 of two sets of precast box culverts. The connecting frame 51 is provided with two sets of connecting holes 52, which are adapted to the mounting holes 22. Fastening bolts 53 are provided between the connecting holes 52 and the mounting holes 22. The guide plate 23 has a groove on the side near the connecting frame 51 that is adapted to the vertical end of the connecting frame 51.

[0029] When installing two sets of precast box culverts, one end of the connecting frame 51 is installed on the guide protrusion 24, and the two sets of lateral ends on one side of the connecting frame 51 are clamped on the guide plate 23. At the same time, the connecting hole 52 is aligned with the mounting hole 22 and fixed with the fastening bolt 53. Silicone sealant is applied to the outer wall of the guide protrusion 24. Using hoisting equipment and lifting ring 26, the precast box culvert to be installed is spliced ​​with the placed precast box culvert, so that the guide groove 25 is adapted to the guide protrusion 24. The two sets of lateral ends of the connecting frame 51 on the side away from the guide protrusion 24 are clamped on the guide plate 23, and the connecting hole 52 is aligned with the mounting hole 22. Finally, it is fixed with the fastening bolt 53. With the help of the silicone sealant, the connection strength between the precast box culverts and the efficiency of on-site construction are effectively improved, while ensuring excellent waterproof performance.

[0030] As a possible implementation of this solution, preferably, the U-shaped connector 6 is disposed on the side near the guide plate 23. The groove of the U-shaped connector 6 is adapted to the lateral end of the bottom of the connecting frame 51. When the connecting frame 51 is installed, the lateral end is clamped on the guide plate 23, and the bottom lateral end passes through the U-shaped connector 6, so that the hole groove of the U-shaped connector 6 corresponds to the mounting hole 22 and the connecting hole 52, and is fixed by fastening bolts 53, which further improves the stability and connection strength of the box culvert splicing.

[0031] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A UHPC prefabricated box culvert structure, characterized in that: The precast box culvert includes a front box culvert (1), a rear box culvert (3) and several sets of intermediate box culverts (2). The bottom of the precast box culvert is provided with a bottom plate (4). The front box culvert (1) is provided with a guide groove (25) near the end of the intermediate box culvert (2). The rear box culvert (3) is provided with a guide protrusion (24) near the end of the intermediate box culvert (2). The outer wall of the guide protrusion (24) is coated with silicone sealant. The guide protrusion (24) is adapted to the guide groove (25). The guide protrusion (24) and the guide groove (25) are respectively provided at both ends of the intermediate box culvert (2). A connecting structure (5) is provided between the front box culvert (1), the middle box culvert (2) and the tail box culvert (3). The two ends of the connecting structure (5) pass through the guide protrusion (24) and the guide groove (25) respectively, and are used to connect the two sets of prefabricated box culverts. Several sets of U-shaped connectors (6) are provided on the inner wall of the prefabricated box culvert, and the connecting structure (5) passes through the U-shaped connectors (6).

2. The UHPC prefabricated box culvert structure according to claim 1, characterized in that: At least three sets of connecting grooves (21) are provided at the mounting ends of the guide protrusion (24) and the guide groove (25). The three sets of connecting grooves (21) are provided on three sides away from the base plate (4). A guide plate (23) is provided on the connecting groove (21), and a mounting hole (22) is provided on the guide plate (23).

3. The UHPC prefabricated box culvert structure according to claim 1, characterized in that: The bottom of the precast box culvert is provided with a through groove, and several sets of reserved steel bars (41) are evenly distributed at the bottom of the precast box culvert. The bottom plate (4) is formed by casting UHPC on site.

4. The UHPC prefabricated box culvert structure according to claim 1, characterized in that: The connecting structure (5) includes a connecting frame (51), which is I-shaped. Both ends of the connecting frame (51) are clamped to the guide plates (23) of two sets of precast box culverts. The connecting frame (51) is provided with two sets of connecting holes (52), which are adapted to the mounting holes (22). Fastening bolts (53) are provided between the connecting holes (52) and the mounting holes (22).

5. A UHPC prefabricated box culvert structure according to claim 1, characterized in that: The U-shaped connector (6) is correspondingly disposed on the side near the guide plate (23), and the slot of the U-shaped connector (6) is adapted to the lateral end of the bottom of the connecting frame (51).

6. A UHPC prefabricated box culvert structure according to claim 2, characterized in that: The guide plate (23) has a groove on the side near the connecting frame (51) that is adapted to the vertical end of the connecting frame (51).

7. The UHPC prefabricated box culvert structure according to claim 1, characterized in that: The precast box culvert is evenly provided with lifting rings (26) around its top.

Images