Adjustable cross slope device for flange plate of edge beam template of precast beam

Abstract

The invention discloses a width adjusting device for a flange plate of an outer side formwork of a curved section prefabricated boundary beam. The width adjusting device is suitable for prefabricating beam plates of T-shaped beams and small box beams of highway bridges. The lower edge of the wing plate is provided with the bolt connected with the outside of the web plate, and the adjustable bolt is adopted to achieve the adjusting function. The connecting channel steel is 10 #, is welded with the flange plate and is provided with a connecting bolt hole in the lower part; the connecting steel plate is formed by meshing and connecting U-shaped and rectangular steel plates; the specification of the locking bolt and nut is M12; and the specifications of the connecting bolt and the adjusting nut are respectively # imgabs0 # lead screw and M30. According to the device, the cross slope of the formwork can be adjusted, the top cross slope of the factory formwork can be adjusted between 2% and 4%, the maximum edge of the wing plates on the two sides can be adjusted by 1.5 cm, the curvature of the flange plates can be adjusted to meet different design requirements, operation is easy and convenient, cost is low, the effect is remarkable, and the formwork manufacturing problem caused by changes of the cross slope and the curvature of a bridge is effectively solved.

Description

Technical Field

[0001] The device relates to the field of highway bridge engineering, and is specifically used in the prefabrication construction process of beams and slabs such as T-beams and small box beams of highway engineering bridges, and is used to accurately adjust the transverse slope and curvature of the flange plate to adapt to bridge structures with different design requirements. Background Art

[0002] In modern highway bridge construction, the precast beam erection method is widely used because it can significantly speed up the construction progress. However, in bridge design, the cross slope of the bridge deck will change in the flat curve section, and accordingly, the cross slope of the top plate of the concrete precast beam also needs to change. Traditional construction faces many difficulties. If templates with different wing slopes and curvatures are made according to different bridge deck cross slopes and curve radii, due to the diversity of bridge design, a wide variety of templates are required, which will lead to a significant increase in the cost of template production, and a lot of manpower, material resources and time will be consumed in the storage, management and replacement of templates.

[0003] During the construction process, the bridge deck is thickened to adjust the cross slope. However, this method has obvious disadvantages. Thickening the bridge deck will increase the deadweight of the bridge, thereby increasing the design load of the bridge. In the long run, this will have an adverse effect on the safety and durability of the bridge structure, and may cause premature bridge damage, shorten the service life of the bridge, increase the cost of later maintenance, and delay the construction progress due to additional paving work during the construction process. In view of the above problems, there is an urgent need for a solution that can meet the requirements of different cross slopes and curvatures, reduce costs and improve construction efficiency. This precast beam side beam formwork flange plate adjustable cross slope device came into being. Summary of the invention

[0004] The adjustable transverse slope device of the flange plate of the precast beam edge beam formwork is designed to provide an efficient, economical and easy-to-operate solution to solve the construction difficulties of the flange plate of the precast beam edge beam formwork on different curves and under different transverse slope design requirements, ensuring the quality and construction progress of the precast beam, while reducing the construction cost and the adverse effects on the bridge structure.

[0005] Connecting channel steel: Use 10# channel steel, the length of which is the same as the width of the flange plate. The upper end is welded firmly to the flange plate, and the lower two ends are welded to the flange plate side mold and supporting steel. A connecting bolt hole slightly larger than 2-3mm is opened at 1 / 3 of the lower channel steel for inserting the connecting bolts. The spacing between the upper and lower connecting channel steels is preferably 15-20cm, and the spacing can be 1-2 meters, providing enough space for bolt adjustment.

[0006] Connecting steel plates: A 6mm thick U-shaped steel plate and a 10mm thick rectangular steel plate are connected to form a parent-child interlocking type. The U-shaped width is slightly larger than the thickness of the steel plate for easy interlocking. The two are connected by bolts to ensure a stable and adjustable connection.

[0007] Locking bolt: The nut specification is M12, and the bolt specification is M12×70, which is used to tightly lock the connecting steel plate to ensure the overall structural stability of the device.

[0008] Connecting bolts and adjusting nuts: Connecting bolts are made of Made of screw rod, the length is about 30cm. The specification of the adjusting nut is M30, and one end of the connecting bolt is firmly welded to the center of the U-shaped steel plate base. During construction and adjustment, 8mm thick steel plate gaskets are set on the upper and lower adjusting nuts to increase the contact area of ​​the adjusting nut, prevent loosening, and protect parts and screws.

[0009] Slope adjustment: Bolts are set at the lower edge of the wing plate to connect with the horizontal double-jointed channel steel outside the web plate, and the adjustment is achieved through adjustable bolts. The top slope of the factory template is designed to be 2%, which can be adjusted to a maximum super-high slope of 4%. The edges of the wing plates on both sides can be adjusted up or down by a maximum of 1.5cm. According to the different slopes of the precast beams, the bolts at the lower edge of the template are adjusted in advance, and the height of the flange plate is changed by moving the bolts up and down to achieve the required slope, ensuring that the slope of the precast beam meets the design specifications.

[0010] Curvature adjustment: Bolts are set at the lower edge of the flange to connect with the transverse steel outside the web, and the adjustable bolts are also used for adjustment. For precast beams with different curve radii, the flange plate connection bolts are adjusted in advance. The flange plate is adjusted up and down to produce different degrees of bending in the transverse direction to achieve the required radius curvature, ensure that the flange plate curve radius and transverse width dimensions meet the design requirements, and make the flange plate line beautiful and smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Adjustable transverse slope device for flange plate of precast beam edge beam formwork;

[0013] In the figure: 1-locking bolt; 2-connecting rectangular steel plate; 3-4 connecting U-shaped steel plate; 4-adjusting bolt; 5-bolt gasket; 6-connecting channel steel; 7-rib plate. DETAILED DESCRIPTION

[0014] The specific implementation examples of the present invention are shown below, and the accompanying drawings provide detailed diagrams to further illustrate the implementation details of the present invention.

[0015] According to the design drawing dimensions and technical requirements of related components, the production personnel are informed and processed according to the traditional prefabricated beam template, and only the vertical ribs of the web and the ribs at the lower edge of the wing are disconnected at the chamfer of the wing web. The adjustment device is installed at the bottom of the edge beam flange template, including the above-mentioned connecting channel steel, connecting steel plate, locking bolts, connecting bolts and adjusting nuts.

[0016] Make connecting channel steel, connecting steel plates, locking bolts, connecting bolts and adjusting nuts in accordance with regulations to ensure that the size, specification and connection method of each component meet the design requirements, such as the model, length, bolt hole position of the connecting channel steel, the thickness, shape and connection method of the connecting steel plate, the specifications of the locking bolts and connecting bolts, etc.

[0017] Before installing the formwork, grind, polish, clean and apply a release agent. When installing, clean the bottom formwork first, then install the side formwork, install the tension bolts and adjust the elevation and line shape, set up the reinforcement support, use a gantry crane to cooperate with manual installation, add temporary fixing measures and diagonal braces to prevent overturning, use double-sided sponge glue to stick the formwork blocks to ensure that there is no leakage, connect with M16 bolts, and the outer formwork consists of two rows of The pull rods are pulled and fixed.

[0018] When adjusting the template, adjust the template height according to the prefabricated T-beam type and the designed transverse slope to ensure that the slope is consistent with the design when the template is installed. The adjustment screw installed on the flange of the T-beam template can be used for precise adjustment. At the same time, set the template adjustment block between the middle beams to ensure smooth connection between adjacent beams.

[0019] The steel bars are processed by CNC bending machines to make ribs, top plates, and wing plate steel frames. The frame uprights and cross bars are welded and fixed with angle steels. The steel bar spacing is drawn and the positioning steel bars are welded. The steel frame is hoisted as a whole. Attention should be paid to the straightness and firm binding of the steel bars. They are arranged according to the designed spacing. Concrete pads are tied at the bottom and outside to ensure a net protective layer. The prestressed duct is fixed with a positioning frame, and the corrugated pipe is passed through to ensure tightness to prevent cement slurry from infiltrating.

[0020] The beam casting adopts centralized material supply from the self-provided concrete mixing plant and the construction is carried out according to the mix ratio approved by the laboratory. The quality and slump of concrete are controlled by the test personnel. The concrete is poured continuously in layers and vibrated with attached and inserted vibrators to avoid contact with corrugated pipes and anchors.

[0021] The formwork should be removed after the concrete strength reaches 2.5MPa. Before removing the formwork, the steel wire rope should be tied to prevent deformation. The two sides should be removed in the order of first supporting and then removing, and then removing the last supporting and then removing. The collision with the beam should be strictly prevented, and the bottom formwork support of the diaphragm should be protected. After removing the formwork, spray curing should be carried out, cover with geotextile and start the automatic spraying system to spray water. The curing should be carried out for no less than 7 days to keep the geotextile on the top plate moist.

[0022] After the formwork is installed, it must be reinforced in strict accordance with the specifications to ensure the stability of the formwork.

[0023] The welding of connecting steel plates and connecting channel steels must be full and firm, and the size of the reserved bolt holes must meet the requirements to avoid being too large and causing instability in the connecting bolts.

[0024] When adjusting the bolts and nuts, calculate the adjustment height strictly according to the design cross slope requirements, adjust accurately, and reserve sufficient length at the bottom of the connecting bolt to ensure a firm and stable connection.

Claims

1. An adjustable transverse slope device for the flange plate of a precast beam edge beam template, characterized in that: The invention comprises a connecting channel steel (6), a connecting steel plate (2) (3), a locking bolt (1), a connecting bolt and an adjusting nut, and is used for prefabrication of T-beams and small box beams and slabs of highway engineering bridges. The transverse slope and curvature of the flange plate can be adjusted by adjusting the bolt (4).

2. The adjustable transverse slope device of the flange plate of the precast beam edge beam template according to claim 1 is characterized in that: The connecting channel steel (6) is of model 10#, with a length consistent with the width of the flange plate (7), the upper end is firmly welded to the flange plate (7), and the lower two ends are welded to the side mold of the flange plate (7) and the supporting steel. A connecting bolt hole slightly larger than 2-3mm is opened at 1 / 3, and the spacing between the upper and lower connecting channel steels (6) is preferably 15-20cm, which can be 1-2 meters.

3. The adjustable transverse slope device of the flange plate of the precast beam edge beam template according to claim 1 is characterized in that: The connecting steel plates are connected by a U-shaped steel plate (3) and a rectangular steel plate (2) to form a parent-child interlocking type. The U-shaped steel plate (3) is 6 mm thick, the rectangular steel plate (2) is 10 mm thick, the U-shaped width is slightly larger than the thickness of the steel plate, and the two are connected by bolts (1).

4. The adjustable transverse slope device for the flange plate of the precast beam edge beam template according to claim 1 is characterized in that: The locking bolt (1) has a nut specification of M12 and a bolt specification of M12×70, and is used for connecting and locking steel plates.

5. The adjustable transverse slope device of the flange plate of the precast beam edge beam template according to claim 1 is characterized in that: The connecting bolt (4) is of the following specifications: The screw rod is preferably 30 cm long; the specification of the adjusting nut is M30; one end of the connecting bolt is firmly welded to the center of the base of the U-shaped steel plate (3); during construction and adjustment, the upper and lower adjusting nuts are provided with 8 mm thick steel plate gaskets (5).

6. The adjustable transverse slope device of the flange plate of the precast beam edge beam template according to claim 1 is characterized in that: Bolts (4) are arranged at the lower edge of the wing plate to connect with the horizontal double-jointed channel steel (6) outside the web plate. Adjustable bolts (4) are used at the connection. The top transverse slope of the factory template is designed to be 2%, which can be adjusted to a maximum super-high transverse slope of 4%. The maximum upward or downward adjustment height of the edges of the wing plates on both sides is 1.5 cm, which is used to adjust the transverse slope.

7. The adjustable transverse slope device of the flange plate of the precast beam edge beam template according to claim 1 is characterized in that: Bolts (4) are arranged at the lower edge of the flange plate to connect with the outer transverse steel of the web plate. Adjustable bolts (4) are used at the connection to adjust the curvature of the flange plate, so as to ensure that the curve radius of the flange plate of the prefabricated beam and the transverse width of the flange plate meet the requirements of the design specification.

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