Pile plate anti-seismic node structure

Abstract

The utility model belongs to the technical field of road and bridge engineering, and particularly discloses a pile-slab anti-seismic node structure which comprises a post-pouring connecting belt for connecting adjacent prefabricated pavement slabs and a combined connecting piece arranged on a prefabricated pile and matched with the prefabricated pavement slabs. The combined connecting piece comprises a lower end plate connected with a precast pile end plate arranged on the top face of the precast pile, and the top end of the lower end plate is connected with an upper end plate through a precast pipe. Screw holes are symmetrically formed in the upper end plate, screw rods are arranged in the screw holes, springs matched with the bottom face of the upper end plate are arranged on the screw rods in a sleeving mode, and the springs are matched with bolts arranged at the bottom ends of the screw rods; on the premise that the stress performance of the pile plate joint is guaranteed, the post-cast connecting belt and the improved combined connecting piece are used for replacing a connection mode that a reinforcement cage is inserted into cast-in-place concrete in traditional pile plate connection, and the assembly construction efficiency of pile plate anti-seismic joint structure connection can be effectively improved; and the construction cost of pile plate anti-seismic joint connection is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of road and bridge engineering, and particularly relates to a pile-plate anti-seismic node structure. Background Art

[0002] The pile-slab soilless road structure is a new type of roadbed structure, which is mainly composed of prefabricated pile foundations, prefabricated beams and slabs, pile-slab joints and other parts. Its key components such as prefabricated pile foundations and prefabricated beams and slabs can be industrially produced and assembled, which can replace the traditional fill roadbed. In actual engineering practice, it can not only effectively reduce the negative impact of traditional roadbed on the ecological environment during construction, but also effectively improve construction efficiency, extend the service life of the structure, reduce the subsequent maintenance costs, and greatly save energy consumption; the pile-slab soilless roadbed meets the green highway construction standards and has good application prospects.

[0003] Pile-slab seismic nodes are key parts of pile-slab soilless road structures and play a vital role in ensuring the normal use of the entire road system. In existing projects, the connection methods of pile-slab seismic nodes mainly adopt steel casing plus steel cage cast-in-place concrete node connection or steel casing processed into U-shaped steel cast-in-place concrete node connection. This type of node connection method has problems such as poor node energy dissipation, difficulty in installation and construction, large amount of temporary facility turnover materials, poor economy, and excessive workload. In addition, the stiffness between pile-slab seismic nodes is large, and the connection between pile and plate is almost rigid, which is very easy to crack and damage under the action of dynamic loads such as vibration and vehicle load.

[0004] In addition, the existing traditional node connection method of inserting steel cage (or steel section) and then grouting has high construction requirements for pile elevation and coordinates, which increases the construction difficulty and thus limits the construction efficiency of pile-plate seismic node connection. Utility Model Content

[0005] In order to solve the above problems, this patent provides a pile-plate seismic node structure that can improve the seismic performance and construction efficiency of the pile-plate node.

[0006] Based on the above objectives, the present invention is achieved through the following technical solutions:

[0007] The pile-plate seismic node structure includes a post-cast connecting strip connecting adjacent prefabricated road panels, and a combined connecting piece arranged on the prefabricated pile and matched with the prefabricated road panels; the combined connecting piece includes a lower end plate connected to the prefabricated pile end plate arranged on the top surface of the prefabricated pile, and the top end of the lower end plate is connected to the upper end plate through a prefabricated pipe; screw holes are symmetrically arranged on the upper end plate, screw holes are provided in the screw holes, and a spring is sleeved on the screw rod and matched with the bottom surface of the upper end plate, and the spring is matched with a bolt arranged at the bottom end of the screw rod.

[0008] Preferably, the post-cast connecting strip includes a reserved steel bar provided at the end of the prefabricated road panel and matched with the upper end plate, and a post-cast concrete laid between adjacent prefabricated road panels and matched with the reserved steel bar and screw rod.

[0009] Preferably, the reserved steel bars are staggered and overlapped with the reserved steel bars at the ends of the adjacent prefabricated road panels, and the reserved steel bars are clearance-matched with the screw rods.

[0010] Preferably, the diameter of the lower end plate is equal to the outer diameter of the precast pile.

[0011] Preferably, the width of the post-cast connecting strip is smaller than the diameter of the upper end plate.

[0012] Preferably, stiffening ribs are symmetrically arranged on the sides of the prefabricated tube, the bottom ends of the stiffening ribs are fixedly connected to the lower end plate, and the top ends are fixedly connected to the upper end plate; the prefabricated tube is a prefabricated metal tube, and the prefabricated tube is preferably a prefabricated steel tube.

[0013] Preferably, the centers of the lower end plate and the upper end plate are located on the center line of the prefabricated tube.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. Under the premise of ensuring the bearing performance of the pile-plate node, the utility model can replace the traditional pile-plate connection method of inserting a steel cage and cast-in-place concrete through a post-cast connecting strip and an improved combined connecting piece, which can effectively improve the assembly construction efficiency of the pile-plate seismic node structure connection and reduce the construction cost of the pile-plate seismic node connection.

[0016] 2. The prefabricated road panels and combined connectors of the present invention can be uniformly produced in advance and assembled on site. They have the characteristics of strong assembly construction, low environmental pollution, high construction efficiency and strong reusability. During long-term operation, they are easy to maintain and replace, which can significantly reduce the subsequent maintenance costs and facilitate the efficient and rapid connection of pile plates. The post-cast concrete and combined connectors used in the present invention can improve the stability and durability of the structure.

[0017] 3. The utility model adopts screw rods to connect the combined connectors and post-cast connecting strips between the prefabricated piles and the prefabricated road panels, a spring is arranged at the lower part of the screw rod, and further connection between the combined connector and the post-cast connecting strip is achieved by post-cast concrete; the presence of the spring can increase the toughness and reset performance of the pile-plate seismic node structure, thereby reducing the dynamic performance of the structure under the action of vibration and dynamic loads, thereby reducing the stress concentration at the pile-plate seismic node structure, ensuring the seismic performance of the pile-plate seismic node structure, and preventing the post-cast connecting strip and the combined connector from cracking and damage.

[0018] 4. The utility model adopts a spring on the screw rod to reduce the influence of dynamic loads such as vibration and vehicle load on the pile-plate seismic node structure, which can improve the stiffness performance of the pile-plate seismic node structure, greatly reduce the dynamic damage of the pile-plate seismic node structure under dynamic load, and improve the seismic resistance of the node.

[0019] 5. The node structure adopted by the present invention greatly improves the toughness and finished product quality of the plate-column node and the assembly of the entire pile-plate roadbed, improves the seismic performance and construction efficiency of the pile-plate node, and reduces the construction complexity and rigidity of the traditional node using inserted steel cage (or inserted steel). BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic cross-sectional view of the utility model in Example 1;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model in Example 1;

[0022] Figure 3 is a schematic diagram of the combined connector in Example 1;

[0023] Figure 4 is an exploded view of the combined connector in Example 1;

[0024] Figure 5 Schematic diagram of the structure of the prefabricated road panel in Example 1.

[0025] In the figure, 1. precast pile, 2. lower end plate, 3. precast pile end plate, 4. stiffening rib, 5. precast pipe, 6. screw, 7. spring, 8. upper end plate, 9. precast road panel, 10. post-poured concrete, 11. reserved steel bar, 12. bolt, 81. screw hole. DETAILED DESCRIPTION

[0026] The present invention is further described below through specific embodiments, but the scope of the present invention is not limited thereto.

[0027] Example 1

[0028] Pile-plate seismic node structure, its structure is as follows Figure 1-Figure 5 As shown, it includes a post-cast connecting strip connecting adjacent prefabricated road panels 9, and a combined connecting piece arranged on the prefabricated pile 1 and matched with the prefabricated road panel 9; the combined connecting piece includes a lower end plate 2 connected to the prefabricated pile end plate 3 arranged on the top surface of the prefabricated pile 1, and the top of the lower end plate 2 is connected to the upper end plate 8 through a prefabricated pipe 5; screw holes 81 are symmetrically provided on the upper end plate 8, and screw holes 81 are provided in the screw holes 81. A spring 7 that matches the bottom surface of the upper end plate 8 is sleeved on the screw 6, and the spring 7 matches the bolt 12 arranged at the bottom end of the screw 6.

[0029] The post-cast connecting strips consist of pre-reinforced steel bars 11 at the ends of the precast slabs 9, which are spaced apart from the upper end plate 8, and post-cast concrete 10, which is laid between adjacent precast slabs 9 and fits in with the pre-reinforced steel bars 11 and screws 6. The pre-reinforced steel bars 11 overlap the pre-reinforced steel bars 11 at the ends of adjacent precast slabs 9, and the pre-reinforced steel bars 11 fit in with the screws 6.

[0030] The diameter of the lower end plate 2 is equal to the outer diameter of the precast pile 1. The width of the post-cast connecting strip is smaller than the diameter of the upper end plate 8. Stiffening ribs 4 are symmetrically arranged on the sides of the precast tube 5. The bottom ends of the stiffening ribs 4 are fixedly connected to the lower end plate 2, and the top ends are fixedly connected to the upper end plate 8. The centers of the lower end plate 2 and the upper end plate 8 are located on the centerline of the precast tube 5.

[0031] The utility model is assembled through the following steps:

[0032] After prefabrication in the factory, the prefabricated pile 1, lower end plate 2, prefabricated pile end plate 3, stiffening rib 4, prefabricated pipe 5, screw 6, spring 7, and upper end plate 8 are transported to the construction site for assembly.

[0033] (1) Precast piles 1 are driven according to the designed pile positions of the pile network. After the precast piles 1 are driven, the lower end plate 2 is welded to the precast pile end plate 3 at the top of the precast pile 1.

[0034] (2) The prefabricated tube 5 is welded to the lower end plate 2, the stiffening ribs 4 are welded to the prefabricated tube 5 and the lower end plate 2, and four stiffening ribs 4 are welded around the prefabricated tube 5 to form a steel tube section with stiffening ribs 4.

[0035] (3) Four screw holes 81 with the same diameter as the screw rod 6 are evenly opened on the circumference of the upper end plate 8 with the center of the upper end plate 8 as the center. The circumferential diameter of the screw rod 6 is smaller than the inner diameter of the precast pile 1 and larger than the circumferential diameter of the outer side of the stiffening rib 4. The upper end plate 8 with the screw holes 81 is welded to the stiffening rib 4 and the precast pipe 5, and the screw rod 6 is inserted into the screw holes 81.

[0036] (4) Put the spring 7 on the lower part of the screw 6 and fix the spring 7 below the bottom end of the upper end plate 8 with the bolt 12.

[0037] (5) Install the ends of two adjacent prefabricated road panels 9 at the splicing position onto the upper end plate 8. During installation, ensure that the reserved steel bars 11 on the prefabricated road panels 9 are staggered and overlapped, and at the same time, ensure that the reserved steel bars 11 do not interfere with or contact the screw rods 6.

[0038] (6) Negative reinforcement is laid on the prefabricated road panel 9 according to the specifications, and concrete 10 is poured at the overlap area between the prefabricated road panel 9 and the reserved steel bars 11.

[0039] The utility model can improve the stiffness performance of the pile-plate seismic node structure through the matching screw 6 and spring 7, greatly reduce the dynamic damage of the pile-plate seismic node structure under dynamic load, and improve the seismic resistance of the node; the combined connector can significantly improve the construction efficiency of the node connection through assembly, and reduce the construction cost of the pile-plate seismic node connection.

[0040] Example 2

[0041] The pile-plate seismic node structure is different from that of Example 1 in that two stiffening ribs 4 are symmetrically arranged on the sides of the prefabricated pipe 5 .

[0042] Example 3

[0043] The pile-plate seismic node structure is different from that of Example 1 in that four stiffening ribs 4 are symmetrically arranged on the sides of the prefabricated pipe 5 .

[0044] Example 4

[0045] The pile-plate seismic node structure is different from that of Example 1 in that more than six stiffening ribs 4 are symmetrically arranged on the sides of the prefabricated pipe 5 .

[0046] The above description is only a preferred embodiment of the present invention, but is not limited to the above examples. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Pile-plate seismic node structure, characterized by: It includes a post-cast connecting strip connecting adjacent prefabricated road panels and a combined connecting piece arranged on the prefabricated piles and matched with the prefabricated road panels; the combined connecting piece includes a lower end plate connected to the prefabricated pile end plate arranged on the top surface of the prefabricated pile, and the top end of the lower end plate is connected to the upper end plate through a prefabricated pipe; screw holes are symmetrically arranged on the upper end plate, screw holes are arranged in the screw holes, and a spring is sleeved on the screw rod that matches the bottom surface of the upper end plate, and the spring matches the bolt arranged at the bottom end of the screw rod.

2. The pile-plate seismic node structure according to claim 1, characterized in that: The post-cast connecting strip comprises a reserved steel bar provided at the end of the prefabricated road panel and matched with the upper end plate, and post-cast concrete laid between adjacent prefabricated road panels and matched with the reserved steel bar and screw rod.

3. The pile-plate seismic node structure according to claim 2, characterized in that: The reserved steel bars are staggered and overlapped with the reserved steel bars at the ends of the adjacent prefabricated road panels, and the reserved steel bars are clearance-matched with the screw rods.

4. The pile-plate seismic node structure according to claim 1, characterized in that: The diameter of the lower end plate is equal to the outer diameter of the precast pile.

5. The pile-plate seismic node structure according to claim 1, characterized in that: The width of the post-cast connecting strip is smaller than the diameter of the upper end plate.

6. The pile-plate seismic node structure according to claim 1, characterized in that: The side surfaces of the prefabricated tube are symmetrically provided with stiffening ribs, the bottom ends of the stiffening ribs are fixedly connected to the lower end plate, and the top ends are fixedly connected to the upper end plate.

7. The pile-plate seismic node structure according to claim 1, characterized in that: The centers of the lower end plate and the upper end plate are located on the center line of the prefabricated tube.

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