A precast pier column and its connecting structure

Abstract

The application discloses a prefabricated pier column and a connecting structure thereof. The prefabricated pier column comprises a lower pier column and an upper pier column. The upper part of the lower pier column is provided with a socket step. The upper part of the socket step is provided with a connecting ring. The lower part of the upper pier column is provided with a connecting groove. The inner wall of the connecting groove is provided with connecting ribs. The connecting rings are arranged between the connecting ribs to form ring arrangement positions. The groove opening of the connecting groove forms a socket groove opening. The connecting structure adopts the prefabricated pier column. The upper end surface of the lower pier column is attached to the lower end surface of the upper pier column. The socket step is attached to the socket groove opening. The connecting ring is inserted into the connecting groove and forms a clearance fit with the connecting ribs. The connecting groove is poured with concrete. The connecting ring in the shape of Ω is designed with double functions, which can be used as a structural connecting piece and a hoisting point. The stress is uniformly distributed through the curvature optimization of the ring body. The stepped socket opening is provided with double positioning surfaces, the vertical positioning precision is high, and the horizontal shear bearing capacity can be improved.

Description

Technical Field

[0001] This application belongs to the field of prefabricated building technology, specifically relating to a prefabricated pier column and its connecting structure, which is applicable to the rapid installation of prefabricated components such as bridge pier columns and building columns. Background Technology

[0002] Traditional precast piers are mostly connected by welding or flange bolts, which has problems such as complex on-site construction procedures, low connection efficiency, insufficient mechanical properties, and poor durability. Although existing socket connection technology can improve construction speed, it generally suffers from poor positioning accuracy, insufficient shear resistance, and lack of multiple force transmission paths. Utility Model Content

[0003] The purpose of this application is to provide a precast pier and its connection structure, which solves the problems of poor installation efficiency and poor connection effect of existing piers. This utility model achieves the synergistic effect of high-precision self-positioning, multiple forces and high-density grouting through innovative structural design.

[0004] The objective of this application is achieved through the following technical solution:

[0005] A precast pier includes a lower pier and an upper pier. The upper part of the lower pier is provided with a socket step, and the upper part of the socket step is provided with a connecting ring. The lower part of the upper pier is provided with a connecting groove. The inner wall of the connecting groove is provided with connecting ribs, and the connecting ribs form a ring placement position. The length and width dimensions of the connecting ring are clearance-fitted with the length and width dimensions of the ring placement position. The groove opening of the connecting groove forms a socket opening that matches the socket step.

[0006] Furthermore, both the lower and upper piers are square or cylindrical.

[0007] Furthermore, the socket step and the connecting ring are made of metal as a single piece or welded together, with the socket step pre-embedded in the lower pier column.

[0008] Furthermore, the aforementioned socket step includes a lower vertical support platform and an upper inclined support platform. The vertical support platform is in the shape of a quadrangular prism, and the inclined support platform is in the shape of a quadrangular frustum. The length and width dimensions of the vertical support platform are greater than the length dimension of the inclined support platform at the ground.

[0009] Furthermore, the connecting ring has an Ω-shaped structure.

[0010] Furthermore, the connecting groove is in the shape of a quadrangular prism.

[0011] Furthermore, the connecting ribs are made of plate-shaped metal material, and the connecting ribs are arranged on the four sides of the connecting groove, with two connecting ribs arranged on each side.

[0012] Furthermore, the annular contact surface of the connecting rib has a tapering structure from top to bottom.

[0013] Furthermore, the lower pier is provided with grouting holes, and the upper pier is provided with grout outlet holes.

[0014] A connection structure for a precast pier column, wherein the precast pier column described above is used, the upper end face of the lower pier column is fitted with the lower end face of the upper pier column, the socket step is fitted with the socket slot, the connecting ring is inserted into the connecting groove and forms a clearance fit with the connecting rib, and concrete is poured into the connecting groove.

[0015] Furthermore, the concrete is a high-strength, non-shrink cement-based material.

[0016] The beneficial effects of this application are:

[0017] (1) The Ω-shaped connecting ring adopts a dual-function design, serving as both a structural connector and a hoisting point. Stress is evenly distributed through ring curvature optimization.

[0018] (2) The stepped socket is equipped with a double positioning surface, which has high vertical positioning accuracy and can improve the horizontal shear bearing capacity.

[0019] (3) The connecting rib adopts a tapered section design and a reinforcing rib plate is set at the root to achieve equal strength force transmission.

[0020] The aforementioned main solution and its various further alternatives can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed in this application; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding this solution, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected in this application, and will not be exhaustively listed here. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the lower pier structure of this application.

[0022] Figure 2 This is a schematic diagram of the upper pier structure of this application.

[0023] Figure 3 This is a structural diagram of the connection structure between the upper and lower pier columns in this application.

[0024] In the diagram: 1-lower pier, 2-insertion step, 3-connecting ring, 4-upper pier, 5-connecting groove, 6-insertion slot, 7-connecting rib; 201-vertical foundation, 202-sloping foundation. Detailed Implementation

[0025] The present application will be further described below with reference to specific embodiments and accompanying drawings.

[0026] Example 1

[0027] refer to Figure 1 and Figure 2 As shown, a precast pier column includes a lower pier column 1 and an upper pier column 4.

[0028] The lower pier 1 has a socket step 2 on its upper part, and a connecting ring 3 on its upper part. The upper pier 4 has a connecting groove 5 on its lower part, and a connecting rib 7 on the inner wall of the connecting groove 5. The groove opening of the connecting groove 5 forms a socket opening 6 that matches the socket step 2. By utilizing the shape matching between the socket step 2 and the socket opening 6, guidance and positioning are achieved during the connection of the piers, thereby improving the load-bearing capacity of the pier connection.

[0029] The connecting ring 3 is used for hoisting and transporting the piers, and also for connecting the piers. By encasing the connecting ring 3 and the connecting rib 7 in concrete, the connection strength between the piers is improved. The connecting groove 5 is used to insert the connecting ring 3, providing space for the placement of the connecting ring 3 and the connecting rib 7.

[0030] A ring-shaped mounting position is formed between the connecting ribs 7. The length and width dimensions of the connecting ring 3 are in clearance fit with the length and width dimensions of the ring-shaped mounting position. That is, after the connecting ring 3 is inserted into the connecting groove 5, the connecting ring 3 and the connecting rib 7 form a clearance fit, realizing the initial connection positioning and ensuring the connection accuracy between the pier columns.

[0031] Both the lower pier 1 and the upper pier 4 are square or round columns, which can be reinforced concrete columns or steel-reinforced concrete columns.

[0032] The socket step 2 and the connecting ring 3 are made of metal, either integrally formed or welded together, and are mostly made of steel plates. The socket step 2 is pre-embedded in the lower pier column 1. The connecting rib 7 is made of plate-shaped metal and is also pre-embedded in the upper pier column 4. The insertion depth of the socket step 2 and the connecting ring 3 is 2 / 3 of the height of the connecting rib 7.

[0033] The socket step 2 includes a lower vertical support 201 and an upper inclined support 202, with an overall height of 80mm. The vertical support 201 is a quadrangular prism and is embedded in the lower pier 1. The inclined support 202 is a quadrangular frustum and a fixed connecting ring 3 is installed on it.

[0034] The length and width of the facade foundation 201 are larger than the length of the long end of the sloping foundation 202, forming a step that is wider at the bottom and narrower at the top. The sloping foundation 202 has four 45° guide slopes for self-positioning. The facade foundation 201 has four vertical surfaces to provide shear resistance.

[0035] The connecting ring 3 has an Ω-shaped structure with a wall thickness of 20mm, which facilitates hoisting operations and also helps to improve the connection strength between the piers. The stress is evenly distributed through the optimization of the ring curvature.

[0036] The connecting groove 5 is a quadrangular prism shape, which facilitates processing and manufacturing. Connecting ribs 7 are arranged on the four sides of the connecting groove 5, with two connecting ribs 7 on each side. The ribs are 300mm high and 80mm wide. The annular contact surface of the connecting ribs 7 has a tapering structure from top to bottom, and a reinforcing rib plate is provided at the root to achieve equal strength force transmission.

[0037] Grouting holes are provided on the lower pier 1 to inject grout into the connecting groove 5. Twelve grouting holes are evenly distributed around the lower pier 1, three on each side to ensure uniform grouting. The hole diameter is 25mm and the hole spacing is 300mm. Grout outlet holes are provided on the upper pier 4 to determine the grouting status of the connecting groove 5.

[0038] After the lower precast pier is in place, the upper precast pier is hoisted and inserted into the connecting ring via connecting ribs. Simultaneously, the stepped sockets of the upper and lower precast piers are connected to complete the initial splicing. Grouting holes are provided around the lower precast pier, and grout outlet holes are provided around the upper precast pier. The final connection is completed by grouting using a sleeve.

[0039] Example 2

[0040] refer to Figures 1-3 As shown, a connection structure for precast pier columns is described, employing the precast pier columns of Embodiment 1. The upper end face of the lower pier column 1 is fitted with the lower end face of the upper pier column 4. The socket step 2 is fitted with the socket slot 6. The connecting ring 3 is inserted into the connecting groove 5 and forms a clearance fit with the connecting rib 7. Concrete is poured into the connecting groove 5. The concrete is a high-strength, non-shrink cement-based material, and the connection and fixation between the upper and lower pier columns are achieved through the concrete.

[0041] The workflow of this application is as follows: 1) After the lower precast pier is in place, it is temporarily fixed by the lifting lugs of the Ω-shaped connecting ring; 2) When lifting the upper precast pier, the position is automatically corrected by the engagement of the inner cavity of the connecting rib and the Ω-shaped ring, so that the connecting rib slides into the Ω-shaped ring until the socket is fully engaged; 3) When the socket is fully engaged, high-strength grout is injected from the lower grouting hole. The grout fills the gaps such as the circumferential gap and the socket gap in sequence, and finally overflows from the upper grout outlet to complete the grouting; 5) It can withstand the design load after 24 hours of curing.

[0042] The foregoing basic examples and their further alternative examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in this application. In the scheme of this application, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A precast pier, comprising a lower pier (1) and an upper pier (4), characterized in that: The lower pier (1) is provided with a socket step (2) on the upper part, a connecting ring (3) is provided on the upper part of the socket step (2), and a connecting groove (5) is provided on the lower part of the upper pier (4). A connecting rib (7) is provided on the inner wall of the connecting groove (5). A ring placement position is formed between the connecting ribs (7). The length and width dimensions of the connecting ring (3) are clearance fit with the length and width dimensions of the ring placement position. The groove opening of the connecting groove (5) forms a socket opening (6) that matches the socket step (2).

2. The precast pier column according to claim 1, characterized in that: The lower pier (1) and upper pier (4) are both square or round columns.

3. The precast pier column according to claim 1, characterized in that: The socket step (2) and the connecting ring (3) are made of metal as a whole or welded, and the socket step (2) is embedded in the lower pier (1).

4. The precast pier column according to claim 1 or 3, characterized in that: The aforementioned socket step (2) includes a lower vertical support platform (201) and an upper inclined support platform (202). The vertical support platform (201) is a quadrangular prism, and the inclined support platform (202) is a quadrangular frustum. The length and width of the vertical support platform (201) are greater than the length of the inclined support platform (202) at the ground.

5. The precast pier column according to claim 1, characterized in that: The connecting ring (3) has an Ω-shaped structure.

6. The precast pier column according to claim 1, characterized in that: The connecting groove (5) is a quadrangular prism.

7. The precast pier column according to claim 1, characterized in that: The connecting ribs (7) are made of plate-shaped metal material. The connecting ribs (7) are arranged on the four sides of the connecting groove (5), with two connecting ribs (7) arranged on each side.

8. The precast pier column according to claim 1 or 7, characterized in that: The annular contact surface of the connecting rib (7) has a tapering structure from top to bottom.

9. The precast pier column according to claim 1, characterized in that: The lower pier (1) is provided with grouting holes, and the upper pier (4) is provided with grout outlet holes.

10. A connection structure for precast pier columns, characterized in that: Using any one of the precast piers described in claims 1 to 9, the upper end face of the lower pier (1) is fitted with the lower end face of the upper pier (4), the insert step (2) is fitted with the socket (6), the connecting ring (3) is inserted into the connecting groove (5) and forms a clearance fit with the connecting rib (7), and concrete is poured into the connecting groove (5).

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