Thin-walled hollow pier steel vertical binding jig frame and construction method thereof

Abstract

The present application relates to a kind of thin-walled hollow pier steel vertical binding jig frame and its construction method, including main frame, main reinforcement positioning tooth plate and tooth plate support rod, main frame includes 4 by the four vertices of rectangle setting vertical rod, 4 vertical rod is welded at least 3 layers of flat link according to the 4 sides of rectangle between, two tooth plate support rods are respectively arranged on each flat link along the direction perpendicular to it horizontally, the rear end of each tooth plate support rod is connected with flat link by bolt, and the front end extends to form cantilever in main frame;The cantilever of each tooth plate support rod on each layer of flat link is set with two main reinforcement positioning tooth plates, and a plurality of main reinforcement positioning grooves are provided on each main reinforcement positioning tooth plate;When steel is bound on jig frame, main reinforcement is vertical state, lower end has stable support, easy to position, can guarantee steel installation precision, steel framework is lifted without turning operation, can avoid being extruded deformation.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology and relates to the construction of thin-walled hollow bridge piers, specifically to a vertical steel reinforcement binding frame for thin-walled hollow piers and its construction method. Background Technology

[0002] There are two methods for constructing steel reinforcement cages for thin-walled hollow bridge piers: in-situ tying and formwork tying. In-situ tying involves transporting the steel bars to the pier location and tying them one by one. This method has low construction efficiency and requires a large amount of work at height. Formwork tying involves tying a steel reinforcement cage for a pier segment on the ground and then lifting the entire cage to the pier for installation. This method effectively reduces the amount of work at height and improves construction efficiency. However, current tying formwork is mostly horizontal. The steel reinforcement cage is tied horizontally on the formwork, and the main reinforcement bars of the pier are horizontal during tying. The inner main reinforcement bars are difficult to position due to a lack of effective support. Furthermore, during lifting, the steel reinforcement cage needs to be adjusted from a horizontal to an upright position, and the crane needs to lift one end of the cage upwards to perform a turning operation, which can easily cause the steel reinforcement cage to twist or be deformed by compression. Summary of the Invention

[0003] The purpose of this invention is to provide a vertical tying frame for thin-walled hollow pier reinforcement and its construction method to solve the above-mentioned problems.

[0004] The present invention provides a vertical tying frame for steel bars of a thin-walled hollow pier, characterized in that it includes a main frame, a main reinforcement positioning tooth plate, and a tooth plate support rod;

[0005] The main frame includes four uprights arranged at the four vertices of a rectangle, and at least three layers of horizontal connecting rods are welded between the four uprights along the four sides of the rectangle.

[0006] Two toothed plate support rods are horizontally arranged on each horizontal connecting rod of the main frame in a direction perpendicular to it. The rear end of each toothed plate support rod is connected to the horizontal connecting rod by a first bolt, and the front end extends into the main frame to form a cantilever. Each toothed plate support rod has a strip-shaped sliding hole along its longitudinal direction. The first bolt connecting the toothed plate support rod and the horizontal connecting rod passes through the strip-shaped sliding hole on the toothed plate support rod, and the toothed plate support rod can slide back and forth on the horizontal connecting rod along the strip-shaped sliding hole.

[0007] Two main reinforcement positioning teeth are erected on the cantilever of each toothed plate support rod on each layer of horizontal connecting rod; each main reinforcement positioning tooth is a ring structure set according to the cross-sectional shape of the pier reinforcement skeleton, and is composed of multiple segments connected by multiple second bolts. Each main reinforcement positioning tooth is connected to the toothed plate support rod by a third bolt; each main reinforcement positioning tooth is provided with several main reinforcement positioning grooves, wherein the bottommost main reinforcement positioning tooth is at a certain height from the ground, and the main reinforcement positioning groove on the bottommost main reinforcement positioning tooth is provided every other main reinforcement, and the main reinforcement positioning grooves on the remaining layers of main reinforcement positioning tooth are provided according to the main reinforcement spacing.

[0008] Furthermore, a vertical support rod is welded to the bottom front end of each toothed plate support rod of the lowest layer of the above-mentioned thin-walled hollow pier steel bar vertical binding frame, and the lower end of the vertical support rod is flush with the lower end of the main frame upright.

[0009] Furthermore, a ladder is provided on one side of the main frame of the above-mentioned thin-walled hollow pier steel bar vertical binding frame, and an operating platform is provided circumferentially on the main frame.

[0010] The above-mentioned method for vertical reinforcement binding of thin-walled hollow piers is characterized by the following steps:

[0011] (1) Support the lower end of the jig on a hardened surface;

[0012] (2) Insert the main reinforcement bars of the pier body vertically into the main reinforcement positioning slots on the positioning tooth plates of each main reinforcement bar in sequence. The lower ends of each main reinforcement bar are supported on the ground and the bottommost main reinforcement positioning tooth plate at intervals to achieve the positioning of the main reinforcement bars; install the tying stirrups to complete the vertical tying of the steel reinforcement skeleton of one segment of the pier body.

[0013] (3) Remove the second bolt connecting each main reinforcement positioning tooth plate segment and the third bolt connecting the main reinforcement positioning tooth plate and the tooth plate support rod, and remove the main reinforcement positioning tooth plate; loosen the first bolt connecting the tooth plate support rod and the flat connecting rod, and slide the tooth plate support rod backward to the outside of the reinforcement cage.

[0014] (4) Use a crane to vertically lift the steel reinforcement cage to the construction position of the pier body for installation.

[0015] This invention enables vertical binding of the pier reinforcement cage. During binding, the main reinforcement bars are in a vertical state on the jig with stable support at the lower end, making positioning easy, ensuring the installation accuracy of the reinforcement bars, and improving the efficiency of reinforcement bar layout. The reinforcement cage does not need to be turned over when being lifted, which can avoid being squeezed and deformed. Attached Figure Description

[0016] Figure 1 It is a side elevation view of the vertical steel reinforcement binding frame;

[0017] Figure 2 yes Figure 1 Cross-sectional view along the AA direction;

[0018] Figure 3 yes Figure 1 The cross-sectional view along the BB direction shows the layout of the main reinforcement positioning grooves on the bottommost main reinforcement positioning tooth plate;

[0019] Figure 4 It is along the main reinforcement. Figure 1 Installation plan view along the AA direction;

[0020] Figure 5 It is along the main reinforcement. Figure 1Installation status plan view in the middle BB direction. Detailed Implementation

[0021] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention provides a vertical binding frame for thin-walled hollow pier reinforcement, comprising a main frame, a main reinforcement positioning tooth plate, and a tooth plate support rod;

[0022] The main frame includes four uprights 1 set at the four vertices of a rectangle, and at least three layers of horizontal connecting rods 2 welded between the four uprights along the four sides of the rectangle.

[0023] Two toothed plate support rods 3 are horizontally arranged on each horizontal connecting rod 2 of the main frame in a direction perpendicular to it. The rear end of each toothed plate support rod 3 is connected to the horizontal connecting rod by a first bolt 4, and the front end extends into the main frame to form a cantilever. Each toothed plate support rod has a strip-shaped sliding hole 5 along its longitudinal direction. The first bolt 4 connecting the toothed plate support rod to the horizontal connecting rod passes through the strip-shaped sliding hole 5 on the toothed plate support rod, and the toothed plate support rod 3 can slide back and forth on the horizontal connecting rod along the strip-shaped sliding hole 5.

[0024] Two main reinforcement positioning teeth 6 are erected on the cantilever of each toothed plate support rod on each layer of horizontal connecting rod; each main reinforcement positioning tooth 6 is a ring structure set according to the cross-sectional shape of the pier reinforcement skeleton, and is composed of multiple segments connected by multiple second bolts 7. Each main reinforcement positioning tooth 6 is connected to the toothed plate support rod 3 by a third bolt 8; each main reinforcement positioning tooth 6 is provided with several main reinforcement positioning grooves 9, wherein the bottommost main reinforcement positioning tooth 6 is at a certain height from the ground, and the main reinforcement positioning groove 9 on the bottommost main reinforcement positioning tooth 6 is set every other pier main reinforcement, and the main reinforcement positioning grooves on the remaining layers of main reinforcement positioning tooth 6 are set according to the spacing of the pier main reinforcement.

[0025] When the main reinforcement bars of the pier are installed, the lower ends of some of the main reinforcement bars are supported on the positioning toothed plate of the lowest layer of main reinforcement bars. In order to avoid the support rod of the lowest layer toothed plate being deformed by pressure, in the specific implementation of this invention, a vertical support rod 10 can be welded to the bottom surface of the front end of each toothed plate support rod 3 of the lowest layer. The lower end of the vertical support rod 10 is flush with the lower end of the upright 1 of the main frame.

[0026] Since the tire frame of the present invention has a vertical structure and a relatively high height, a ladder 11 can be provided on one side of the main frame, and an operating platform 12 can be provided circumferentially on the main frame.

[0027] The construction method for tying the pier reinforcement using the above-mentioned vertical tying frame for thin-walled hollow pier reinforcement is as follows:

[0028] (1) Support the lower end of the jig on a hardened surface;

[0029] (2) such as Figure 4 , Figure 5As shown, the main reinforcement bars 13 of the pier body are vertically inserted into the main reinforcement positioning slots 9 on the main reinforcement positioning tooth plates 6 in sequence. The lower ends of each main reinforcement bar are supported at intervals on the ground and on the lowest main reinforcement positioning tooth plate 6 to achieve precise positioning of the main reinforcement bars. Then, the tying stirrups are installed to complete the vertical tying of the steel reinforcement skeleton of one segment of the pier body.

[0030] When installing steel reinforcement cage segments on the pier body, the lower end of the main reinforcement of the previous segment must be connected to the upper end of the main reinforcement of the next segment. This invention uses spaced main reinforcement positioning grooves on the bottommost main reinforcement positioning tooth plate, allowing the lower ends of the main reinforcement to be supported at intervals on the ground and the bottommost main reinforcement positioning tooth plate. This ensures that the main reinforcement joints are staggered, preventing them from being located at the same cross-section.

[0031] (3) Remove the second bolt 7 between the main reinforcement positioning tooth plate segments and the third bolt 8 between the main reinforcement positioning tooth plate and the tooth plate support rod, and remove the main reinforcement positioning tooth plate 6; loosen the first bolt 4 between the tooth plate support rod and the flat connecting rod, and slide the tooth plate support rod 3 backward to the outside of the steel reinforcement cage.

[0032] (4) Use a crane to vertically lift the steel reinforcement cage to the construction position of the pier body for installation.

Claims

1. A vertical tying frame for thin-walled hollow pier reinforcement, characterized in that: Includes the main frame, main reinforcement positioning toothed plate, and toothed plate support rod; The main frame includes four uprights arranged at the four vertices of a rectangle, and at least three layers of horizontal connecting rods are welded between the four uprights along the four sides of the rectangle. Two toothed plate support rods are horizontally arranged on each horizontal connecting rod of the main frame in a direction perpendicular to it. The rear end of each toothed plate support rod is connected to the horizontal connecting rod by a first bolt, and the front end extends into the main frame to form a cantilever. Each toothed plate support rod has a strip-shaped sliding hole along its longitudinal direction. The first bolt connecting the toothed plate support rod and the horizontal connecting rod passes through the strip-shaped sliding hole on the toothed plate support rod, and the toothed plate support rod can slide back and forth on the horizontal connecting rod along the strip-shaped sliding hole. Two main reinforcement positioning teeth are erected on the cantilever of each toothed plate support rod on each layer of horizontal connecting rod; each main reinforcement positioning tooth is a ring structure set according to the cross-sectional shape of the pier reinforcement skeleton, and is composed of multiple segments connected by multiple second bolts. Each main reinforcement positioning tooth is connected to the toothed plate support rod by a third bolt; each main reinforcement positioning tooth is provided with several main reinforcement positioning grooves, wherein the bottommost main reinforcement positioning tooth is at a certain height from the ground, and the main reinforcement positioning groove on the bottommost main reinforcement positioning tooth is provided every other main reinforcement, and the main reinforcement positioning grooves on the remaining layers of main reinforcement positioning tooth are provided according to the main reinforcement spacing.

2. The vertical tying frame for thin-walled hollow pier reinforcement according to claim 1, characterized in that: A vertical support rod is welded to the bottom front end of each toothed plate support rod at the bottom of the lowest layer, and the lower end of the vertical support rod is flush with the lower end of the upright of the main frame.

3. The vertical tying frame for thin-walled hollow pier reinforcement according to claim 1, characterized in that: A ladder is provided on one side of the main frame, and an operating platform is provided around the main frame.

4. A method for vertically binding the reinforcing bars of a thin-walled hollow pier, using the vertical binding frame for the reinforcing bars of a thin-walled hollow pier as described in any one of claims 1 to 3, characterized in that... Includes the following steps: (1) Support the lower end of the jig on a hardened surface; (2) Insert the main reinforcement bars of the pier body vertically into the main reinforcement positioning slots on the positioning tooth plates of each main reinforcement bar in sequence. The lower ends of each main reinforcement bar are supported on the ground and the bottommost main reinforcement positioning tooth plate at intervals to achieve the positioning of the main reinforcement bars; install the tying stirrups to complete the vertical tying of the steel reinforcement skeleton of one segment of the pier body. (3) Remove the second bolt between the main reinforcement positioning tooth plate segments and the third bolt between the main reinforcement positioning tooth plate and the tooth plate support rod, and remove the main reinforcement positioning tooth plate; loosen the first bolt between the tooth plate support rod and the flat connecting rod, and slide the tooth plate support rod backward to the outside of the steel reinforcement cage. (4) Use a crane to vertically lift the steel reinforcement cage to the construction position of the pier body for installation.

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