Wet joint protection formwork structure for precast beam single cantilever

Abstract

The utility model relates to a wet joint protection template structure for a single cantilever of a precast beam, which comprises a template component fixedly mounted at the end part of the precast beam and positioned at the bottom end part of a wet joint; the steel bar assembly is located in the wet joint and used for connecting the formwork assembly and the precast beam into a whole; the formwork assembly comprises a plurality of bottom formworks, a plurality of hanging rings and a plurality of connecting pieces, the hanging rings are fixedly installed on the bottom formworks at intervals, and the hanging rings are fixedly installed on the steel bar assembly through the connecting pieces and are suitable for enhancing the stability of the bottom formworks. The protective formwork structure can effectively prevent concrete at the position of a wet joint from cracking; after the precast beam is installed, the bottom end of the wet joint is in a closed state, it is guaranteed that sundries cannot fall onto a road below in the follow-up construction process, road-related installation is avoided, the risk in protection installation is reduced, and the protection effect is achieved in advance; and the formwork assembly and the steel bar assembly do not need to be dismantled after concrete pouring, and construction procedures are saved.

Description

Technical Field

[0001] This utility model belongs to the field of precast beam construction technology, and relates to wet joints of precast beams, especially a wet joint protection template structure for single cantilever precast beams. Background Technology

[0002] Currently, many bridges that cross existing roads are constructed using precast T-beams. The components of these precast T-beams require a cast-in-place wet joint structure for connection. Traditional precast beam wet joint structures require fixed formwork, which presents the following problems:

[0003] 1. When installing the formwork for wet joints, debris is prone to fall during construction, especially if there is a road under the precast beam, which poses a safety hazard. If a ground-mounted protective shed or a hanging protective net is erected, it will be road-related construction, affecting traffic and posing a high safety risk. In addition, the installation space of the protective net conflicts with that of the formwork, making construction inconvenient.

[0004] 2. When installing or dismantling the formwork for wet joints, scaffolding needs to be erected on the road below the precast beams for road-related construction, which occupies part of the road and affects construction. This is especially true when the road is narrow or the curved section cannot be used for traffic diversion, which poses a construction difficulty problem. In addition, the scaffolding erection process is cumbersome, the construction efficiency is low, and the construction period is long.

[0005] 3. The traditional method of installing wet joint formwork is to tie it up from top to bottom, and to embed PVC pipes in the concrete for tying. This method will reduce the construction quality of the concrete and easily cause quality problems such as concrete cracking.

[0006] To address this issue, we propose a wet joint protection template structure for single cantilever precast beams. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a simple and easy-to-construct wet joint protection template structure for precast beams with single cantilever.

[0008] To solve the above problems, the technical solution of this utility model is as follows:

[0009] A wet joint protection formwork structure for a single cantilever precast beam includes:

[0010] The template assembly is fixedly installed at the end of the precast beam and located at the bottom end of the wet joint;

[0011] Reinforcing steel components, located within wet joints, are used to connect formwork components to precast beams as a whole;

[0012] The formwork assembly includes several bottom formworks, several lifting rings, and several connectors. Several lifting rings are fixedly installed at intervals on several bottom formworks, and the lifting rings are fixedly installed on the reinforcing steel assembly through connectors, which is suitable for enhancing the stability of the bottom formwork.

[0013] In a further embodiment, the template assembly also includes several side templates, one end of several bottom templates is fixedly installed on the bottom end surface of the precast beam, and the other end of several bottom templates is fixedly installed with several side templates.

[0014] In a further embodiment, the reinforcing steel assembly includes several precast beam reinforcing bars and several connecting bars. Several precast beam reinforcing bars are longitudinally embedded at intervals at the ends of the precast beams, and several connecting bars are transversely fixedly installed on the several precast beam reinforcing bars, which is suitable for connecting the several precast beam reinforcing bars into a whole.

[0015] In a further embodiment, ear bars are fixedly installed on the precast beam reinforcement for installing connectors.

[0016] In a further embodiment, one end of several reinforcing bars is fixedly installed at intervals on several side templates, and the other end of several reinforcing bars is fixedly installed on the precast beam reinforcement.

[0017] In a further embodiment, the lifting ring is fixedly installed on the bottom template via a lifting ring base, and the connector is inclined.

[0018] In a further embodiment, several pin assemblies are fixedly installed on the bottom template, which are suitable for connecting the bottom template and the precast beam.

[0019] In a further embodiment, pin assemblies are fixedly installed on both the front and rear sides of the lifting ring.

[0020] In a further embodiment, the pin assembly includes a pin seat, a pin body, and a pre-embedded sleeve, with one end of the pin seat and the pin body being fixedly installed on the bottom template in sequence.

[0021] A pre-embedded sleeve is embedded in the precast beam, and the other end of the pin body is inserted into the pre-embedded sleeve.

[0022] In a further embodiment, a pad is installed between the bottom template and the bottom end face of the precast beam.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. This protective formwork structure uses connectors, pin assemblies, and reinforcing ribs to fix the formwork components, which can effectively prevent concrete cracking at wet joints. Moreover, the formwork components can be installed before the precast beams are installed, and the bottom end of the wet joint is sealed after the precast beams are installed, ensuring that debris will not fall onto the road below during subsequent construction, avoiding road-related installation, reducing the risks in protective installation, providing protection in advance, reducing traffic impact, and avoiding safety hazards. Furthermore, the formwork components and reinforcing steel components do not need to be removed after the concrete is poured, saving construction steps.

[0025] 2. This protective formwork structure uses a pin assembly to fix the bottom formwork and the precast beam together to connect the bottom formwork and the precast beam into a whole. Ear bars are fixedly installed on the precast beam reinforcement, and lifting rings are fixedly installed on the bottom formwork. Connectors are installed between the lifting rings and the ear bars. The connectors are inclined to form a stable connection structure between the bottom formwork and the reinforcement assembly, ensuring the strength and stability of the bottom formwork.

[0026] 3. Several side templates are fixedly installed at the outer ends of several bottom templates of this protective template structure. Several reinforcing ribs are fixedly installed at one end of several side templates, and the other end of several reinforcing ribs is fixedly installed on the precast beam reinforcement. This is suitable for transverse reinforcement connection of the side templates, ensuring that the side templates are installed stably and firmly; and it can reduce the thickness of the steel plate of the template assembly, saving construction costs.

[0027] 4. A pad is installed between the bottom formwork of this protective formwork structure and the bottom end face of the precast beam. The pad is made of rubber material, which can buffer and protect the bottom end face of the precast beam, reducing damage to the precast beam structure during construction. The bottom formwork and side formwork are integrated steel plates, which do not need to be removed after the concrete is poured at the wet joint. This makes the formwork assembly and the steel reinforcement assembly form a whole, realizing integrated protection and formwork reinforcement, reducing construction risks, improving construction efficiency, and strengthening the structural strength of the wet joint of the precast beam. Attached Figure Description

[0028] Figure 1 This is a front view of a wet joint protection formwork structure for a precast beam single cantilever;

[0029] Figure 2 This is a side view of a wet joint protection template structure for a precast beam single cantilever.

[0030] In the diagram: 1. Wet joint; 2. Precast beam; 3. Reinforcing steel assembly; 31. Reinforcing bar; 32. Connecting bar; 33. Ear bar; 34. Precast beam reinforcement; 4. Formwork assembly; 41. Side formwork; 42. Bottom formwork; 43. Lifting ring base; 44. Lifting ring; 45. Connector; 46. Pin assembly; 461. Pin seat; 462. Pin body; 463. Embedded sleeve; 47. Pad. Detailed Implementation

[0031] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] Example 1:

[0033] A wet joint protection formwork structure for single cantilever precast beams, such as Figure 1 , Figure 2 As shown, the end of the precast beam 2 is a wet joint 1. The wet joint 1 is connected to the precast beam 2 as a whole by the steel reinforcement assembly 3. The bottom and side ends of the wet joint 1 are fixedly installed with the formwork assembly 4 to facilitate the pouring of concrete. Preferably, both the steel reinforcement assembly 3 and the formwork assembly 4 are made of steel.

[0034] like Figure 1 , Figure 2As shown, the reinforcing steel assembly 3 includes several reinforcing bars 31, several connecting bars 32, several ear bars 33, and several precast beam reinforcing bars 34. One end of the precast beam reinforcing bars 34 is embedded in the precast beam 2, and the other end of the precast beam reinforcing bars 34 is located in the wet joint 1. The several precast beam reinforcing bars 34 are spaced apart along the direction of the precast beam 2, and all of the several precast beam reinforcing bars 34 are ring structures. Several connecting bars 32 are fixedly installed transversely at intervals on the several precast beam reinforcing bars 34 to connect the several precast beam reinforcing bars 34 into a whole. The several connecting bars 32 are all located in the wet joint 1. Inside, the direction of several connecting bars 32 corresponds to the direction of the precast beam 2, that is, several precast beam reinforcing bars 34 and several connecting bars 32 are arranged perpendicularly; ear bars 33 are fixedly installed on the precast beam reinforcing bars 34, the ear bars 33 are located inside the wet joint 1 and close to the precast beam 2, the ear bars 33 have a near semi-circular structure, and are used to connect the formwork assembly 4; one end of the reinforcing bar 31 is fixedly installed on the outer end of the precast beam reinforcing bar 34, and the other end of the reinforcing bar 31 is fixedly installed on the outer end of the formwork assembly 4, for connecting the formwork assembly 4 to the reinforcing bar assembly 3. Preferably, the number of precast beam reinforcing bars 34 is greater than the number of ear bars 33; the ear bars 33 are made of HPB300 steel bars with a diameter of 12mm; the reinforcing bars 31 are made of HPB300 steel bars with a diameter of 12mm.

[0035] like Figure 1 , Figure 2As shown, the template assembly 4 includes several side templates 41, several bottom templates 42, several lifting rings 44, and several pin assemblies 46. The side templates 41 and bottom templates 42 are connected sequentially to form a whole. One end of the bottom templates 42 is fixedly installed at the bottom end of the precast beam 2, and a pad 47 is sandwiched between the bottom templates 42 and the precast beam 2. The other end of the bottom templates 42 is fixedly installed with several side templates 41. The side templates 41 are vertically arranged, and the bottom templates 42 are inclined. The inclination angle of the bottom templates 42 corresponds to the inclination angle of the bottom end face of the precast beam 2. Several lifting ring bases 43 are fixedly installed longitudinally at intervals on the bottom templates 42. The lifting ring bases 43 are all located on the side close to the side templates 41. The lifting ring bases 43 are plate-shaped structures, and lifting rings 44 are fixedly installed on each of the lifting ring bases 43. The lifting rings 44 are ring-shaped structures. A connector 45 is fixedly installed between the lifting ring 44 and the ear rib 33. The connector 45 is inclined to enhance the stability of the bottom formwork 42 and ensure the load-bearing capacity of the bottom formwork 42. One end of the pin assembly 46 is also fixedly installed on the bottom formwork 42, and the other end of the pin assembly 46 is fixedly installed on the bottom end of the precast beam 2. A pin assembly 46 is set on the front and rear sides of the lifting ring 44 to enhance the connection strength between the formwork assembly 4 and the precast beam 2. The pin assembly 46 includes a pin seat 461, a pin body 462 and a pre-embedded sleeve 463. The pin seat 461 is fixedly installed on the bottom formwork 42 and adjacent to the precast beam 2. One end of the pin body 462 is fixedly installed on the pin seat 461. The pre-embedded sleeve 463 is embedded in the precast beam 2 and adjacent to the wet joint 1. The other end of the pin body 462 is inserted into the pre-embedded sleeve 463. Preferably, connector 45 is a turnbuckle; pad 47 is made of rubber; side template 41 and bottom template 42 are both made of 3mm thick steel plate; embedded sleeve 463 is a 20mm diameter PVC sleeve; pin body 462 has a diameter of 20mm; pin seat 461 has dimensions of 50mm*50mm*25mm; lifting eye base 43 has dimensions of 100mm*50mm*10mm; lifting eye 44 and connector 45 are both M10.

[0036] The working principle of this utility model is as follows: When manufacturing the precast beam 2, several pre-embedded sleeves 463 are pre-embedded at intervals at the bottom end of the precast beam 2 near the wet joint 1; after the precast beam 2 is produced, it is transported to the construction site, a pad 47 is installed at the bottom end of the precast beam 2, and then a pin seat 461 and a pin body 462 are fixedly installed on the bottom template 42, and the pin body 462 is inserted into the pre-embedded sleeves 463, thereby fixing the bottom template 42 at the end of the precast beam 2; after the precast beam 2 is installed in the predetermined position, the steel reinforcement assembly 3 is installed, several reinforcing bars 31 are fixedly installed at intervals on the side template 41 for connecting the precast beam steel reinforcement 34, and ear bars 33 are fixedly installed at the top of the precast beam steel reinforcement 34, and the bottom template 3 is fixedly installed on the bottom template 41. The lifting ring base 43 and lifting ring 44 are fixedly installed on the 42 in sequence. The connector 45 is installed between the lifting ring 44 and the ear rib 33 to form a stable triangular structure, which enhances the stability of the template component 4. The template component 4 can seal the bottom end of the wet joint 1 to prevent debris from falling. It also eliminates the need for scaffolding and other structures for template installation, making it quick and safe. After the template component 4 and the steel reinforcement component 3 are installed, concrete is poured and cured according to the construction requirements to complete the construction of the wet joint 1. This avoids the problem that traditional protective structures need to be installed on the road after the precast beam 2 is hoisted, reducing the risk in protective installation, providing protection in advance, improving the structural quality of the wet joint 1, and minimizing the impact on the road below.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A formwork structure for a precast beam single cantilever wet joint protection form, characterized by, The utility model relates to a prefabricated beam wet joint structure, which comprises: a template assembly (4) fixedly installed at the end of a prefabricated beam (2) and located at the bottom end of a wet joint (1); a reinforcing assembly (3) located in the wet joint (1) and used to connect the template assembly (4) and the prefabricated beam (2) into a whole; the template assembly (4) comprises a plurality of bottom templates (42), a plurality of lifting rings (44), and a plurality of connecting pieces (45), the lifting rings (44) are fixedly installed on the bottom templates (42) at intervals, and the lifting rings (44) are fixedly installed on the reinforcing assembly (3) through the connecting pieces (45) and are suitable for strengthening the stability of the bottom templates (42).

2. The formwork structure for a single cantilevered wet joint of a precast beam according to claim 1, wherein The template assembly (4) further comprises a plurality of side templates (41), one end of each of the bottom templates (42) is fixedly installed on the bottom end surface of the prefabricated beam (2), and the other end of each of the bottom templates (42) is fixedly installed with a side template (41).

3. The formwork structure for a single cantilevered wet joint of a precast beam according to claim 2, wherein The reinforcing assembly (3) comprises a plurality of prefabricated beam reinforcing bars (34) and a plurality of connecting bars (32), the end of the prefabricated beam (2) is longitudinally and interval buried with a plurality of prefabricated beam reinforcing bars (34), and a plurality of connecting bars (32) are fixedly installed on each of the prefabricated beam reinforcing bars (34) at intervals in the transverse direction and are suitable for connecting a plurality of prefabricated beam reinforcing bars (34) into a whole.

4. The formwork structure for a single cantilevered wet joint of a precast beam according to claim 3, wherein An ear bar (33) is fixedly installed on each of the prefabricated beam reinforcing bars (34) and is used to install the connecting piece (45).

5. The formwork structure for a precast beam single cantilever wet joint protection form according to claim 4, wherein, One end of each of a plurality of reinforcing bars (31) is fixedly installed on each of the side templates (41), and the other end of each of the reinforcing bars (31) is fixedly installed on the prefabricated beam reinforcing bar (34).

6. The formwork structure for a single cantilevered wet joint of a precast beam according to claim 5, wherein The lifting ring (44) is fixedly installed on the bottom template (42) through a lifting ring base (43), and the connecting piece (45) is arranged in an inclined manner.

7. The formwork structure for a single cantilevered wet joint of a precast beam according to claim 1, wherein A plurality of bolt assemblies (46) are fixedly installed on the bottom template (42) and are suitable for connecting the bottom template (42) and the prefabricated beam (2).

8. The formwork structure for a single cantilevered wet joint of a precast beam according to claim 7, wherein The bolt assembly (46) is fixedly installed on the front side and the rear side of the lifting ring (44).

9. The formwork structure for a single cantilevered wet joint of a precast beam according to claim 8, wherein, The bolt assembly (46) comprises a pin base (461), a bolt body (462), and a pre-buried sleeve (463), the pin base (461) and one end of the bolt body (462) are fixedly installed on the bottom template (42) in sequence; the pre-buried sleeve (463) is embedded in the prefabricated beam (2), and the other end of the bolt body (462) is inserted into the pre-buried sleeve (463).

10. The formwork structure for a single cantilevered wet joint of a precast beam according to claim 9, wherein, A spacer plate (47) is clamped between the bottom template (42) and the bottom end surface of the prefabricated beam (2).

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