Complex terrain small-radius curve bridge supporting formwork structure and construction technology thereof

Abstract

The invention relates to a complex terrain small-radius curve bridge supporting formwork structure and a construction technology thereof. The complex terrain small-radius curve bridge supporting formwork structure is characterized by comprising supporting brackets, distribution beams and bailey trusses; the multiple sets of hoop units are arranged on the bridge buttress, the distributive girder lifting adjusting units are supported through friction force formed between the hoop units and the bridge buttress, and the L-shaped bracket supporting frames are arranged on the hoop units so that the supporting strength of the whole hoop units can be guaranteed; the distribution beam lifting adjusting unit achieves supporting and height adjusting on a distribution beam placed on the distribution beam lifting adjusting unit through a wedge block type structure under the cooperation of a screw rod and a nut. The distribution beam combination forms a trumpet-shaped structure on the bridge buttress so as to ensure that the distribution beam combination can support the bailey truss; the supporting formwork can adapt to complex terrain structures, the supporting formwork can be built under the condition that a scaffold is not needed, the operation frame is used in cooperation with the truck crane, the building efficiency is improved, and meanwhile the cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a supporting formwork structure for a small-radius curved bridge on a complex terrain and a construction process thereof. Background Art

[0002] When constructing a bridge between general bridge piers, a common method is to use pre-installed bridge modules to directly construct it between the two piers; however, for complex terrain and curved locations, a common method is generally to use a cast-in-place method. This cast-in-place bridge requires the construction of a Bailey frame to support the concrete casting mold, and the Bailey frame is supported by a scaffolding. However, this method is generally suitable for flat ground and low-height piers. In complex terrain, it is impossible to set up a scaffolding to support the Bailey frame; and because the structure between the piers is an arc-shaped curve, a trumpet shape is formed in the overhead direction, and the erection and installation of the Bailey frame is very inconvenient. Therefore, a support formwork structure specifically for small-radius curve bridges is needed to solve the problem of inconvenient erection and troublesome operation of small support formwork for small-radius curves in complex terrain. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a complex terrain small radius curve bridge support formwork structure and its construction process, which can solve the problem of inconvenient erection and cumbersome operation of small radius curve small support formwork under general complex terrain.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a supporting formwork structure for a small-radius curved bridge in complex terrain, wherein the curved bridge supporting frame is arranged on two adjacent groups of bridge piers, and the bridge piers are trumpet-shaped in a top-down direction; the innovative point of the invention is that it includes supporting corbels, distribution beams and Bailey frames; The supporting corbel is arranged on the bridge pier, and supporting positions are formed on both sides of the bridge pier for supporting the distribution beam; the distance between the outer contour of the supporting corbel on the inner bridge pier and the center of the bridge pier is smaller than the distance between the outer contour of the supporting corbel on the outer bridge pier and the center of the bridge pier; The distribution beam is installed on the supporting brackets on both sides of the bridge pier, and the distribution beams on two adjacent bridge piers form a distribution beam combination supporting the Bailey frame, and the distribution beam combination is arranged in a trumpet shape in a top view direction; There are several Bailey frames which are erected between two adjacent bridge piers. The bottom end of the Bailey frame is fixedly mounted on the distribution beam. The installation position of the distribution beam is adjusted to ensure that Bailey frames of the same length are supported and installed on the distribution beam. A scaffold is installed on the top of the Bailey frame, and a plywood is provided on the top of the scaffold.

[0005] Furthermore, the supporting corbel includes a hoop unit and a distribution beam lifting and adjusting unit; The hoop unit has a plurality of parts, and each hoop unit is provided with a bolt locking plate at the end through two semicircular arc hoops, which are formed by bolt locking; a corbel support frame is provided at the bolt locking plate, and the corbel support frame is an L-shaped structure, and a bolt hole is opened on the corbel support frame for connecting to the outer side of the bolt locking plate to enhance the supporting strength of the bolt locking plate; the hoop unit is hooped on the bridge pier along the vertical direction; The lifting and lowering adjustment unit of the distribution beam is arranged above the corbel support frame of the hoop unit located at the top end, and the distribution beam lifting and lowering adjustment unit comprises a bottom wedge block, a movable wedge block and a lifting wedge block; the cross-section of the bottom wedge block is an isosceles trapezoidal structure, and the movable wedge block has a pair and is respectively arranged on both sides of the bottom wedge block, the movable wedge block is an isosceles trapezoidal structure, and the hypotenuse of the movable wedge block is in contact with the hypotenuse of the bottom wedge block; an adjusting threaded hole is arranged on the movable wedge block along the horizontal direction, and an adjusting screw is horizontally arranged in the adjusting threaded hole, and an adjusting nut is arranged on the outer surface of the movable wedge on the adjusting screw. The lifting wedge block is arranged between the movable wedge blocks and the lifting wedge block and the bottom wedge are symmetrically arranged in the horizontal direction. The cross-section of the lifting wedge block is an isosceles trapezoidal structure, and the inclined surface of the lifting wedge block is tightly attached to the inclined surfaces of the two movable wedge blocks; the movable wedge blocks are driven to move toward or away from each other through the cooperation of the adjusting nut and the adjusting screw, thereby driving the lifting and lowering adjustment of the lifting wedge blocks in the vertical direction.

[0006] A process for erecting a supporting formwork structure for a small-radius curved bridge on complex terrain, the innovation of which is as follows: S1: Construction of the operating frame: First, a pre-set I-beam structure is set at the top of the bridge pier. A vertical beam is horizontally set on the pre-set I-beam by using a car crane. Vertical screws are set near both ends of the vertical beam in the vertical direction, and a hand winch is set on the vertical beam. A Bailey frame is connected to the bottom of the vertical screw by a car crane as a support platform for manual operation. When the support platform is constructed, multiple clamp units are placed on the support platform at the same time to complete the construction preparation of multiple components at one time: S2: Installation of the corbel structure: The operator stands on the support platform and uses a hand chain hoist to lift the hoop unit placed on the support platform to the required construction height, and fixes it on the bridge pier. Repeat the operation until multiple hoop units are installed, and at the same time, the distribution beam lifting and adjusting unit is fixed on the top of the hoop unit; S3: Installation of distribution beam: Use a truck crane to hoist the distribution beam to the distribution beam lifting and adjusting unit on the bracket structure and fix the position of the distribution beam. It is also necessary to ensure the installation position of the distribution beam and the spacing between the distribution beam combinations to meet the installation of Bailey frames of the same length; S4: Installation of Bailey frame: Hoist Bailey frames of the same length onto the distribution beam, and adjust the different distances between the distribution beam and the bridge pier on the corbel structure to ensure that the distribution beam is supported on the end of the Bailey frame to achieve the installation of the Bailey frame.

[0007] The advantages of the present invention are: 1) In the present invention, multiple groups of hoop units are arranged on the bridge piers, and the friction force formed between the hoop units and the bridge piers is used to support the distribution beam lifting and adjusting unit, and an L-shaped bracket support frame is arranged on the hoop unit to ensure the supporting strength of the entire hoop unit; the distribution beam lifting and adjusting unit supports and adjusts the height of the distribution beam placed on the distribution beam lifting and adjusting unit through a wedge-type structure with the cooperation of a screw and a nut; the distribution beam combination forms a trumpet-shaped structure on the bridge pier to ensure that the distribution beam combination can support the Bailey frame.

[0008] 2) The supporting formwork structure in the present invention replaces the conventional supporting structure using scaffolding, which can adapt to complex terrain structures and build the supporting formwork without scaffolding. The operating frame is used in conjunction with a truck crane, which improves the construction efficiency while reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0010] Figure 1 This is a structural diagram of a complex terrain small radius curve bridge support formwork of the present invention.

[0011] Figure 2 This is a top view of the structural formwork of a complex terrain small-radius curve bridge support of the present invention.

[0012] Figure 3 This is a partial structural diagram of a complex terrain small radius curve bridge support formwork of the present invention.

[0013] Figure 4 This is a structural diagram of an operating frame for a complex terrain small-radius curved bridge support formwork according to the present invention. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figures 1 to 4 The figure shows a complex terrain small radius curved bridge support formwork structure, in which the curved bridge support frame is arranged on two adjacent groups of bridge piers, and the bridge piers are trumpet-shaped when viewed from above; it includes a supporting corbel 1, a distribution beam 2 and a Bailey frame 3.

[0017] The supporting corbel 1 is arranged on the bridge pier, and supporting positions are formed on both sides of the bridge pier for supporting the distribution beam 2; the distance between the outer contour of the supporting corbel 1 on the inner bridge pier and the center of the bridge pier is smaller than the distance between the outer contour of the supporting corbel on the outer bridge pier and the center of the bridge pier.

[0018] The distribution beam 2 is installed on the supporting brackets 1 on both sides of the bridge pier, and the distribution beams on two adjacent bridge piers form a distribution beam combination supporting the Bailey frame 3, and the distribution beam combination is arranged in a trumpet shape in the top view direction.

[0019] There are several Bailey frames 3 and they are erected between two adjacent bridge piers. The bottom end of the Bailey frame 3 is fixedly mounted on the distribution beam 2. The installation position of the distribution beam 2 is adjusted to ensure that the Bailey frames 3 of the same length are supported and installed on the distribution beam. A scaffolding 4 is installed at the top of the Bailey frame 3, and a plywood is provided at the top of the scaffolding 4.

[0020] The supporting corbel 1 comprises a hoop unit 11 and a distribution beam lifting and adjusting unit 12 .

[0021] The hoop units 11 have a plurality of hoop units, and each hoop unit is provided with a bolt locking plate at the end through two semicircular arc hoops, which are formed by bolt locking; a corbel support frame is provided at the bolt locking plate, and the corbel support frame is an L-shaped structure, and bolt holes are opened on the corbel support frame for connecting to the outer side of the bolt locking plate to enhance the supporting strength of the bolt locking plate; the hoop unit is hooped on the bridge pier along the vertical direction.

[0022] The distribution beam lifting and adjusting unit 12 is arranged above the corbel support frame of the hoop unit 11 located at the top end, and the distribution beam lifting and adjusting unit includes a bottom wedge, a movable wedge and a lifting wedge; the cross-section of the bottom wedge is an isosceles trapezoidal structure, and the movable wedge has a pair of and is respectively arranged on both sides of the bottom wedge, the movable wedge is an isosceles trapezoidal structure, and the hypotenuse of the movable wedge is in contact with the hypotenuse of the bottom wedge; an adjusting threaded hole is arranged on the movable wedge along the horizontal direction, and an adjusting screw is arranged horizontally in the adjusting threaded hole, and an adjusting nut is arranged on the outer surface of the movable wedge on the adjusting screw, the lifting wedge is arranged between the movable wedges and the lifting wedge and the bottom wedge are symmetrically arranged in the horizontal direction, the cross-section of the lifting wedge is an isosceles trapezoidal structure, and the inclined surface of the lifting wedge is tightly attached to the inclined surfaces of the two movable wedges; the movable wedge is driven to move toward or away from each other by the adjustment nut and the adjustment screw, thereby driving the lifting and lowering adjustment of the lifting wedge in the vertical direction.

[0023] A process for erecting a supporting formwork structure for a small-radius curved bridge on complex terrain. The specific erection process is as follows: S1: Construction of the operating frame: First, a pre-set I-beam structure is set at the top of the bridge pier. A vertical beam is horizontally set on the pre-set I-beam by using a car crane. Vertical screws are set near both ends of the vertical beam in the vertical direction, and a hand winch is set on the vertical beam. A Bailey frame is connected to the bottom of the vertical screw by a car crane as a support platform for manual operation. When the support platform is constructed, multiple clamp units are placed on the support platform at the same time to complete the construction preparation of multiple components at one time: S2: Installation of the corbel structure: The operator stands on the support platform and uses a hand chain hoist to lift the hoop unit placed on the support platform to the required construction height, and fixes it on the bridge pier. Repeat the operation until multiple hoop units are installed, and at the same time, the distribution beam lifting and adjusting unit is fixed on the top of the hoop unit; S3: Installation of distribution beam: Use a truck crane to hoist the distribution beam to the distribution beam lifting and adjusting unit on the bracket structure and fix the position of the distribution beam. It is also necessary to ensure the installation position of the distribution beam and the spacing between the distribution beam combinations to meet the installation of Bailey frames of the same length; S4: Installation of Bailey frame: Hoist Bailey frames of the same length onto the distribution beam, and adjust the different distances between the distribution beam and the bridge pier on the corbel structure to ensure that the distribution beam is supported on the end of the Bailey frame to achieve the installation of the Bailey frame.

[0024] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and these changes and improvements shall all fall within the scope of the present invention claimed for protection.

Claims

1. A support formwork structure for a small-radius curved bridge on complex terrain, wherein the curved bridge support frame is arranged on two adjacent groups of bridge piers, and the bridge piers are trumpet-shaped in a top-down direction; characterized in that: Includes supporting corbels, distribution beams and Bailey frames; The supporting corbel is arranged on the bridge pier, and supporting positions are formed on both sides of the bridge pier for supporting the distribution beam; the distance between the outer contour of the supporting corbel on the inner bridge pier and the center of the bridge pier is smaller than the distance between the outer contour of the supporting corbel on the outer bridge pier and the center of the bridge pier; The distribution beam is installed on the supporting brackets on both sides of the bridge pier, and the distribution beams on two adjacent bridge piers form a distribution beam combination supporting the Bailey frame, and the distribution beam combination is arranged in a trumpet shape in a top view direction; There are several Bailey frames which are erected between two adjacent bridge piers. The bottom end of the Bailey frame is fixedly mounted on the distribution beam. The installation position of the distribution beam is adjusted to ensure that Bailey frames of the same length are supported and installed on the distribution beam. A scaffold is installed on the top of the Bailey frame, and a plywood is provided on the top of the scaffold.

2. The complex terrain small radius curve bridge support formwork structure according to claim 1, characterized in that: The supporting corbel comprises a hoop unit and a distribution beam lifting and adjusting unit; The hoop unit has a plurality of parts, and each hoop unit is provided with a bolt locking plate at the end through two semicircular arc hoops, which are formed by bolt locking; a corbel support frame is provided at the bolt locking plate, and the corbel support frame is an L-shaped structure, and a bolt hole is opened on the corbel support frame for connecting to the outer side of the bolt locking plate to enhance the supporting strength of the bolt locking plate; the hoop unit is hooped on the bridge pier along the vertical direction; The lifting and lowering adjustment unit of the distribution beam is arranged above the corbel support frame of the hoop unit located at the top end, and the distribution beam lifting and lowering adjustment unit comprises a bottom wedge block, a movable wedge block and a lifting wedge block; the cross-section of the bottom wedge block is an isosceles trapezoidal structure, and the movable wedge block has a pair and is respectively arranged on both sides of the bottom wedge block, the movable wedge block is an isosceles trapezoidal structure, and the hypotenuse of the movable wedge block is in contact with the hypotenuse of the bottom wedge block; an adjusting threaded hole is arranged on the movable wedge block along the horizontal direction, and an adjusting screw is horizontally arranged in the adjusting threaded hole, and an adjusting nut is arranged on the outer surface of the movable wedge on the adjusting screw. The lifting wedge block is arranged between the movable wedge blocks and the lifting wedge block and the bottom wedge are symmetrically arranged in the horizontal direction. The cross-section of the lifting wedge block is an isosceles trapezoidal structure, and the inclined surface of the lifting wedge block is tightly attached to the inclined surfaces of the two movable wedge blocks; the movable wedge blocks are driven to move toward or away from each other through the cooperation of the adjusting nut and the adjusting screw, thereby driving the lifting and lowering adjustment of the lifting wedge blocks in the vertical direction.

3. A process for erecting a supporting formwork structure for a small-radius curved bridge on complex terrain, characterized in that: The specific installation process is as follows: S1: Construction of the operating frame: First, a pre-set I-beam structure is set at the top of the bridge pier. A vertical beam is horizontally set on the pre-set I-beam by using a car crane. Vertical screws are set near both ends of the vertical beam in the vertical direction, and a hand winch is set on the vertical beam. A Bailey frame is connected to the bottom of the vertical screw by a car crane as a support platform for manual operation. When the support platform is constructed, multiple clamp units are placed on the support platform at the same time to complete the construction preparation of multiple components at one time: S2: Installation of the corbel structure: The operator stands on the support platform and uses a hand chain hoist to lift the hoop unit placed on the support platform to the required construction height, and fixes it on the bridge pier. Repeat the operation until multiple hoop units are installed, and at the same time, the distribution beam lifting and adjusting unit is fixed on the top of the hoop unit; S3: Installation of distribution beam: Use a truck crane to hoist the distribution beam to the distribution beam lifting and adjusting unit on the bracket structure and fix the position of the distribution beam. It is also necessary to ensure the installation position of the distribution beam and the spacing between the distribution beam combinations to meet the installation of Bailey frames of the same length; S4: Installation of Bailey frame: Hoist Bailey frames of the same length onto the distribution beam, and adjust the different distances between the distribution beam and the bridge pier on the corbel structure to ensure that the distribution beam is supported on the end of the Bailey frame to achieve the installation of the Bailey frame.

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