A precast pier for bridge fabrication

Abstract

This utility model provides a precast pier cap for bridge construction, belonging to the field of precast pier caps. It includes foundation piles, installation components, and connection components. A pile cap is integrally cast at the top of the foundation pile. The utility model features an embedded groove at the bottom of the precast pier cap corresponding to the pile cap. When the precast pier cap and pile cap are installed, the top part of the pile cap is inserted into the embedded groove. Post-cast grooves are provided on both sides of the precast pier cap corresponding to the embedded grooves. Connecting steel plates are pre-embedded inside the post-cast grooves. Connecting holes are correspondingly opened on the surfaces of the post-cast grooves and connecting steel plates. Connecting threaded steel pre-embedded inside the pile cap is inserted into the connecting holes and fixed by connecting nuts. This allows the foundation pile to be assembled and connected to the precast pier cap through the pile cap. This construction method replaces the on-site casting of the pier cap, eliminating the need for on-site formwork and rebar tying, significantly shortening the construction period and reducing the impact on the surrounding environment.

Description

Technical Field

[0001] This utility model relates to the field of precast piers, specifically a precast pier for bridge fabrication. Background Technology

[0002] In bridge engineering, the pier cap is a key component connecting the piers and pile foundations. Its construction quality directly affects the overall stability and durability of the bridge. Elevated bridges require the use of a large number of high-pile pier caps. The pier cap is the part that connects the piles to the columns or piers. The pier cap connects several or even a dozen piles together to form a pile foundation. Piles are divided into high-pile pier caps and low-pile pier caps. By setting a detachable external body on the outside of the pier cap, the pier cap itself is protected, which effectively avoids the problem of the pier cap being damaged by long-term water flow erosion and sudden stress. Traditional pier caps use the cast-in-place process, which requires on-site formwork, steel reinforcement binding, concrete pouring and curing. It is greatly affected by the weather and the site. Some construction requirements have little impact on the surrounding environment and traffic and it is difficult to shorten the construction period. Therefore, there is a great demand for prefabricated assembled pier caps. Utility Model Content

[0003] The purpose of this invention is to provide a prefabricated abutment for bridge fabrication, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated pier for bridge fabrication, comprising foundation piles, installation components, and docking components;

[0005] Among them: the top of the foundation pile is integrally cast with a pile cap, and the top of the foundation pile is connected to a precast pile cap;

[0006] The installation components include a connecting threaded steel bar pre-embedded and cast inside the pile cap. The bottom of the precast bearing platform is provided with an embedding groove corresponding to the pile cap. The two sides of the surface of the precast bearing platform are provided with post-cast grooves corresponding to the embedding grooves. A connecting steel plate is pre-embedded inside the post-cast groove. A connecting hole is provided through the surface of the post-cast groove and the connecting steel plate. The connecting threaded steel bar is inserted into the connecting hole and extends into the post-cast groove. A connecting nut is threadedly connected to the top of the connecting threaded steel bar.

[0007] The docking assembly includes a casting groove opened in the middle of the top of the precast foundation. Several connecting bolts are pre-embedded around the inside of the casting groove. The top of the connecting bolts is threaded with a grouting sleeve. The top of the grouting sleeve is connected with a grouting hole, and the bottom of the grouting sleeve is connected with a grout outlet hole.

[0008] As a preferred embodiment of this utility model: heat dissipation holes formed during the prefabrication process are provided through the center of the surface of the prefabricated foundation and the four corners of the foundation, and grouting material is poured into the heat dissipation holes.

[0009] As a preferred embodiment of this utility model: after the connecting threaded steel is inserted into the connecting hole, it is filled with concrete grout, and the concrete grout is higher than the grade of the precast foundation concrete.

[0010] As a preferred embodiment of this utility model, the dimensions of the casting trough are matched with the dimensions of the bridge pier.

[0011] As a preferred embodiment of this utility model, the bottom of the precast foundation is coated with a layer of cement slurry.

[0012] As a preferred embodiment of this utility model, the inner wall of the casting trough is roughened and moistened before casting.

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

[0014] (1) An embedding groove is reserved at the bottom of the precast foundation corresponding to the pile cap. When the precast foundation and the pile cap are installed, the top part of the pile cap is inserted into the embedding groove. Post-casting grooves are provided on both sides of the surface of the precast foundation corresponding to the embedding grooves. A connecting steel plate is embedded in the post-casting groove. A connecting hole is opened through the surface of the post-casting groove and the connecting steel plate. The connecting threaded steel embedded in the pile cap is inserted into the connecting hole and fixed by the connecting nut. The foundation pile is assembled and connected to the precast foundation through the pile cap. This construction method replaces the on-site casting of the foundation. There is no need for on-site formwork and steel bar binding, which greatly shortens the construction period and reduces the impact on the surrounding environment.

[0015] (2) A casting groove is provided at the top center of the precast pier. Several connecting bolts are pre-embedded around the inside of the casting groove. The top of the connecting bolts is threaded with a grouting sleeve. When the bridge pier is cast after the precast pier is installed, the steel bars inside the bridge pier are threadedly connected to the grouting sleeve. Grout is injected into the grouting sleeve through the grouting hole and the excess grout is discharged through the grout outlet hole, so as to facilitate the stable connection between the bridge pier steel bars and the inside of the precast pier. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the precast foundation of this utility model;

[0018] Figure 3 This is a schematic diagram of the docking component structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the grout filling structure of this utility model.

[0020] In the diagram: 1. Foundation pile; 2. Pile cap; 3. Precast pile cap;

[0021] 4. Install components; 41. Connect threaded steel bars; 42. Embedded groove; 43. Post-cast groove; 44. Connecting steel plate; 45. Connecting hole; 46. Connecting nut;

[0022] 5. Connecting components; 51. Casting trough; 52. Connecting bolts; 53. Grouting sleeve; 54. Grouting hole; 55. Grout outlet hole;

[0023] 6. Heat dissipation holes; 7. Grouting material; 8. Cement grout layer. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Please see Figure 1 - Figure 4 A precast abutment for bridge fabrication includes: foundation piles 1, installation components 4, and docking components 5;

[0026] A pile cap 2 is integrally cast at the top of the foundation pile 1, and a precast pile cap 3 is connected to the top of the foundation pile 1.

[0027] Please see Figure 1 - Figure 2 The installation component 4 includes a connecting threaded steel bar 41 pre-embedded and cast inside the pile cap 2. The bottom of the precast bearing platform 3 is provided with an embedding groove 42 corresponding to the pile cap 2. The two sides of the surface of the precast bearing platform 3 are provided with post-cast grooves 43 corresponding to the embedding grooves 42. A connecting steel plate 44 is pre-embedded inside the post-cast groove 43. A connecting hole 45 is provided through the surface of the post-cast groove 43 and the connecting steel plate 44. The connecting threaded steel bar 41 is inserted into the connecting hole 45 and extends into the post-cast groove 43. A connecting nut 46 is threadedly connected to the top of the connecting threaded steel bar 41.

[0028] In practical use: An embedding groove 42 is reserved at the bottom of the precast foundation 3 corresponding to the pile cap 2. When the precast foundation 3 and the pile cap 2 are installed, the top part of the pile cap 2 is inserted into the embedding groove 42. Post-cast grooves 43 are provided on both sides of the surface of the precast foundation 3 corresponding to the embedding grooves 42. A connecting steel plate 44 is embedded in the post-cast groove 43. A connecting hole 45 is opened through the surface of the post-cast groove 43 and the connecting steel plate 44. The connecting threaded steel 41 embedded in the pile cap 2 is inserted into the connecting hole 45 and fixed by the connecting nut 46. The foundation pile 1 is assembled and connected to the precast foundation 3 through the pile cap 2. This construction method replaces the on-site casting of the foundation, eliminating the need for on-site formwork and steel bar binding, greatly shortening the construction period and reducing the impact on the surrounding environment.

[0029] Please see Figure 1 , Figure 3 The docking component 5 includes a casting groove 51 opened at the middle of the top of the precast foundation 3. Several connecting bolts 52 are pre-embedded around the inside of the casting groove 51. A grouting sleeve 53 is threadedly connected to the top of the connecting bolts 52. A grouting hole 54 is connected to the top of the grouting sleeve 53. A grout outlet hole 55 is connected to the bottom of the grouting sleeve 53.

[0030] In practical use: a casting groove 51 is provided at the top center of the precast pier 3. Several connecting bolts 52 are pre-embedded around the inside of the casting groove 51. The top of the connecting bolts 52 is threaded with a grouting sleeve 53. When the bridge pier is cast after the precast pier 3 is installed, the steel bars inside the bridge pier are threadedly connected to the grouting sleeve 53. Grout is injected into the grouting sleeve 53 through the grouting hole 54, and the excess grout is discharged through the grout outlet hole 55, so as to facilitate the stable connection between the bridge pier steel bars and the inside of the precast pier 3.

[0031] Please see Figure 4 The precast foundation 3 has heat dissipation holes 6 formed during the precasting process in the middle and four corners of its surface, and the heat dissipation holes 6 are filled with grouting material 7.

[0032] In practical use: heat dissipation holes 6 are provided through the center and four corners of the surface of the precast foundation 3. During the prefabrication process, a large volume of concrete needs to be poured for the foundation. The pre-set cooling pipes are used to cool the concrete blocks after pouring to prevent the internal temperature of the concrete blocks from being too high and causing cracks. After the precast foundation 3 is completed, grout 7 is pressed into the heat dissipation holes 6 to fill them.

[0033] Please see Figure 2 After the connecting threaded steel bar 41 is inserted into the connecting hole 45, concrete grouting is performed to fill it. The concrete grouting grade is higher than that of the precast foundation 3 concrete.

[0034] In practical use: after the connecting threaded steel bar 41 is inserted into the connecting hole 45, concrete grouting is performed to fill the gap at the connection. The grade of the filling concrete is higher than that of the precast pier 3 concrete to ensure the connection strength.

[0035] Please see Figure 3 The dimensions of the casting trough 51 match the dimensions of the bridge pier.

[0036] In practical use: the dimensions reserved in the casting trough 51 match the pier, so that the integrity of the structure can be guaranteed during subsequent casting construction.

[0037] Please see Figure 1 The bottom of the precast foundation 3 is coated with a layer of cement slurry 8.

[0038] In practical use: The bottom of the precast pile cap 3 is coated with a layer of cement slurry 8, which seals the gap between the pile cap 2 and the bottom of the precast pile cap 3, preventing rainwater and air from eroding the connection.

[0039] Please see Figure 3 Before pouring, the inner wall of the pouring trough 51 should be roughened and moistened.

[0040] In practical use: the inner wall of the pouring trough 51 is roughened before pouring, and the pouring trough 51 is cleaned to keep it clean. Pouring is carried out after wetting to ensure the adhesion between the pouring trough and the subsequent concrete.

[0041] An embedding groove 42 is reserved at the bottom of the precast foundation 3 corresponding to the pile cap 2. When the precast foundation 3 and the pile cap 2 are installed, the top part of the pile cap 2 is inserted into the embedding groove 42. Post-cast grooves 43 are provided on both sides of the surface of the precast foundation 3 corresponding to the embedding grooves 42. A connecting steel plate 44 is embedded in the post-cast groove 43. A connecting hole 45 is opened through the surface of the post-cast groove 43 and the connecting steel plate 44. The connecting threaded steel 41 embedded in the pile cap 2 is inserted into the connecting hole 45 and fixed by the connecting nut 46. The foundation pile 1 is assembled and connected to the precast foundation 3 through the pile cap 2. This construction method replaces the on-site casting of the foundation, eliminating the need for on-site formwork and steel bar binding, greatly shortening the construction period and reducing the impact on the surrounding environment.

[0042] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A precast pile cap for bridge fabrication, characterized by, include: Foundation pile (1), the top of the foundation pile (1) is integrally cast with a pile cap (2), and the top of the foundation pile (1) is connected with a precast pile cap (3); The installation component (4) includes a connecting threaded steel bar (41) pre-embedded and cast inside the pile cap (2). The bottom of the precast bearing platform (3) is provided with an embedding groove (42) corresponding to the pile cap (2). The two sides of the surface of the precast bearing platform (3) are provided with post-casting grooves (43) corresponding to the embedding grooves (42). A connecting steel plate (44) is pre-embedded inside the post-casting groove (43). A connecting hole (45) is provided through the surface of the post-casting groove (43) and the connecting steel plate (44). The connecting threaded steel bar (41) is inserted into the connecting hole (45) and extends into the post-casting groove (43). A connecting nut (46) is threadedly connected to the top of the connecting threaded steel bar (41). The docking assembly (5) includes a casting groove (51) opened at the middle of the top of the precast foundation (3). Several connecting bolts (52) are pre-embedded around the inside of the casting groove (51). A grouting sleeve (53) is threaded to the top of the connecting bolt (52). A grouting hole (54) is connected to the top of the grouting sleeve (53). A grout outlet hole (55) is connected to the bottom of the grouting sleeve (53).

2. The precast pile cap of claim 1, wherein: The precast foundation (3) has heat dissipation holes (6) formed during the precasting process in the middle and four corners of its surface. Grouting material (7) is poured into the heat dissipation holes (6).

3. The precast pile cap of claim 1, wherein: The connecting threaded steel (41) is inserted into the connecting hole (45) and then filled with concrete grout. The concrete grout is higher than the concrete grade of the precast foundation (3).

4. The precast pile cap of claim 1, wherein: The dimensions of the casting trough (51) are matched with the dimensions of the bridge pier.

5. The precast pile cap of claim 1, wherein: The bottom of the precast foundation (3) is coated with a layer of cement slurry (8).

6. The precast pile cap of claim 1, wherein: The inner wall of the casting trough (51) is roughened and moistened before casting.

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