An assembled arch, span, longitudinal slope adjustable precast beam bottom die assembly

Abstract

The length of highway precast beam varies frequently; the bottom plate needs to adjust the pre-arch frequently; the change of longitudinal slope is adjusted by setting the slope of the beam bottom surface in contact with the support. The application discloses a prefabricated beam bottom die assembly with adjustable arch, span and longitudinal slope, which is composed of a bottom plate, a cover plate and a longitudinal slope adjusting module. The bottom die assembly is longitudinally spliced by a plurality of bottom die modules, each bottom die module is vertically connected with the foundation through embedded bolts, and the pre-arch of the bottom die is adjusted by adjusting the pad block; the longitudinal slope adjusting module is arranged on the connecting surface of the two ends and the support, the longitudinal slope adjusting module adopts hinged + jack adjusting to realize the accurate adjustment of the longitudinal slope of the connecting surface of the beam body and the support and the position locking; the upper cover plate with different sizes and the longitudinal slope adjusting module can be interchanged to realize the span adjustment. The bottom die can adapt to different beam length and span, conveniently adjust the pre-arch, accurately adjust the longitudinal slope, and facilitate the fixation of the side die and the installation of the lifting steel wire rope when the beam body is demoulded.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and more specifically to a prefabricated beam bottom formwork assembly with adjustable camber, span, and longitudinal slope. Background Technology

[0002] Highway bridges often use precast precast beams as their structure. The bridge beams are primarily precast centrally in a beam fabrication yard. Due to variations in span, skewness, and curves, the span of the precast beams needs continuous adjustment; the pre-camber also varies for different beam lengths and needs adjustment before fabrication; the longitudinal slope at the junction of the precast beam bottom and the support also needs continuous adjustment depending on the road gradient. The conventional practice is to use dedicated platforms for beams of different spans, with the bases cast in concrete and a fixed pre-camber. This results in low platform utilization and the inability to adjust the pre-camber. The longitudinal slope is typically adjusted using sandboxes and steel plates, but sandbox adjustments lack precision, leading to a series of quality problems. Utility Model Content

[0003] This invention proposes a prefabricated beam bottom formwork assembly with adjustable camber, span, and longitudinal slope to solve the above problems. The invention's content is as follows:

[0004] A prefabricated beam bottom formwork assembly with adjustable camber, span, and longitudinal slope consists of a base plate, a cover plate, and a longitudinal slope adjustment module.

[0005] Furthermore, the base plate is connected to the end support column and the middle support column on the left and right sides of the base plate; the bottom part of the base plate has base plate fixing bolt holes; and the end support column and the middle support column have holes on their sides.

[0006] Furthermore, the cover plate is provided with cover plate fixing flanges at its four corners; the cover plate is available in various length sizes.

[0007] Furthermore, the longitudinal slope adjustment module consists of a longitudinal slope adjustment module base plate, a longitudinal slope adjustment module shaft, a longitudinal slope adjustment module cover plate, and positioning bolts. The longitudinal slope adjustment module base plate consists of a base plate, a vertical steel plate, a top plate, adjusting nuts, a positioning flange, and a hinge seat; the longitudinal slope adjustment module cover plate consists of a panel and a hinge seat.

[0008] Furthermore, multiple base plates are longitudinally connected as a whole by bolts; the cover plate is installed on the support column of the base plate; the cover plate fixing flange is fixed to the support column by bolts.

[0009] Furthermore, multiple base plates of the bottom formwork assembly are vertically fixed to the concrete foundation and the fixing bolt holes of the bottom plate by anchor bolts, and the overall pre-camber of the bottom formwork is adjusted by adjusting the thickness of the pads at each position.

[0010] Furthermore, the base plate and cover plate of the longitudinal slope adjustment module are connected by a hinged pivot, and the positioning bolts are installed on the adjusting nut. By adjusting the positioning bolts, the longitudinal slope of the beam bottom support plate can be adjusted.

[0011] Furthermore, the longitudinal slope adjustment module and the cover plate can be longitudinally interchanged on the base plate, and the span of the precast beam can be adjusted by adjusting the longitudinal installation position of the longitudinal slope adjustment module.

[0012] Beneficial effects

[0013] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0014] 1. The bottom formwork assembly is composed of multiple base plates. The bottom formwork is connected to the concrete foundation by anchor bolts. This structure allows for rapid adjustment of the pre-camber of the precast beam by adjusting the thickness of the pads between the base plate and the concrete foundation.

[0015] 2. The longitudinal slope adjustment module and the cover plate can be longitudinally interchanged on the base plate to enable the prefabrication of beams of different spans on the same platform, thereby improving the utilization rate of the force-controlled beam platform.

[0016] 3. The base plate and cover plate of the longitudinal slope adjustment module are connected by a pivot hinge. By adjusting the positioning bolts, the longitudinal slope of the precast beam bottom support plate can be precisely adjusted.

[0017] 4. The hollow bottom mold of the array allows for the lower parts of the two side molds to be fixed at any position within the hollow bottom mold, resulting in good adaptability for template installation.

[0018] 5. The hollow bottom mold with detachable cover plate design allows for easy insertion of the lifting beam wire rope through the hollow bottom mold after beam fabrication, facilitating beam hoisting and demolding. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 Beam end bottom formwork module assembly Figure 1

[0021] Figure 2 Beam end bottom formwork module assembly Figure 2

[0022] Figure 3 Longitudinal slope adjustment module

[0023] Figure 4 Bottom view of the base plate

[0024] Figure 5 Schematic diagram of side mold tie fixing

[0025] Figure 6 Schematic diagram of wire rope lifting beam demolding

[0026] Figure 7 Cross-sectional view of bottom formwork pre-camber adjustment

[0027] Figure 8 Side view of bottom formwork pre-camber adjustment

[0028] The components include: 1. Base plate 1-1, Base plate bottom plate 1-2, End support column 1-3, Middle support column 1-4, Base plate fixing bolt holes; 2. Cover plate 2-1, Cover plate fixing flange; 3. Longitudinal slope adjustment module 3-1, Longitudinal slope adjustment module base plate 3-11, Longitudinal slope adjustment module base plate bottom plate 3-12, Longitudinal slope adjustment module base plate vertical steel plate 3-13, Longitudinal slope adjustment module base plate top plate 3-14, Longitudinal slope adjustment module adjusting nut 3-15, Longitudinal slope adjustment module base plate fixing flange 3-16, Longitudinal slope adjustment module base plate hinge seat 3-2, Longitudinal slope adjustment module rotating shaft 3-3, Longitudinal slope adjustment module cover plate 3-31, Longitudinal slope adjustment module cover plate panel 3-32, Longitudinal slope adjustment module cover plate hinge seat 3-4, Positioning bolts; 4. Concrete foundation; 5. Pad block; 6. Anchor bolts; 7. Side formwork; 8. Tie rod; 9. Steel wire rope; 10. Protective tile; 11. Precast beam; 12. 3. Bottom formwork assembly. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent transformations or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0030] The terms "installation," "connection," "linking," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of these terms in this invention based on the specific circumstances.

[0031] A prefabricated beam bottom formwork assembly with adjustable camber, span, and longitudinal slope consists of a base plate 1, a cover plate 2, and a longitudinal slope adjustment module 3.

[0032] The base plate 1-1 of the base plate 1 is connected to the end support column 1-2 and the middle support column 1-3 on the left and right sides of the base plate 1-1; the base plate 1-1 has base plate fixing bolt holes 1-4 at the bottom; the end support column 1-2 and the middle support column 1-3 have holes on their sides.

[0033] The cover plate 2 is provided with cover plate fixing flanges 2-1 at its four corners; the cover plate 2 is available in various length sizes, such as 20cm, 40cm, 60cm, and 100cm.

[0034] The longitudinal slope adjustment module 3 consists of a longitudinal slope adjustment module base plate 3-1, a longitudinal slope adjustment module rotating shaft 3-2, a longitudinal slope adjustment module cover plate 3-3, and positioning bolts 3-4; wherein the longitudinal slope adjustment module base plate 3-1 consists of a longitudinal slope adjustment module base plate bottom plate 3-11, a longitudinal slope adjustment module base plate vertical steel plate 3-12, a longitudinal slope adjustment module base plate top plate 3-13, and a longitudinal slope adjustment module adjusting nut 3-14; the longitudinal slope adjustment module base plate 3-1 is provided with a longitudinal slope adjustment module base plate fixing flange 3-15 and a longitudinal slope adjustment module base plate hinge seat 3-16; the longitudinal slope adjustment module cover plate 3-3 consists of a longitudinal slope adjustment module cover plate panel 3-31 and a longitudinal slope adjustment module cover plate hinge seat 3-32.

[0035] The installation sequence is as follows: First, pour the concrete foundation 4 of the bottom formwork and pre-embed nuts in the concrete foundation 4; place the adjusting pad 5 according to the pre-camber value; install and fix the base plate 1-1 on the concrete foundation 4 using anchor bolts 6; the bottom formwork assembly is composed of multiple bottom formwork modules spliced ​​longitudinally, and the splicing length is determined according to the designed beam length; install the cover plate 2, determine the installation position of the beam end longitudinal slope adjustment module 3 according to the span, and install and fix it; install the fixing bolts of each flange 2-1 and 3-15; adjust the longitudinal slope of the longitudinal slope adjustment module cover plate 3-3 and lock the positioning bolts 3-4; complete the installation and adjustment of the bottom formwork. See Figure 1 , Figure 2 , Figure 3 .

[0036] The longitudinal slope adjustment module 3 and the cover plate 2 can be longitudinally interchanged on the base plate 1 to enable the prefabrication of beams of different spans on the same beam-making platform, thereby improving the utilization rate of the prefabrication platform. See Figure 2 .

[0037] The longitudinal slope adjustment module base plate 3-1 and the longitudinal slope adjustment module cover plate 3-3 of the longitudinal slope adjustment module 3 are hinged together by a rotating shaft 3-2. By adjusting the positioning bolts 3-4, the longitudinal slope of the bottom support plate of the precast beam 11 can be precisely adjusted. See Figure 3 .

[0038] The hollow bottom formwork structure allows for easy fixing of the lower parts of both side forms 7 at any position after installation, providing good adaptability for formwork installation. After the bottom formwork assembly 123 and side forms 7 are installed, the bottom of the side forms 7 is fixed by tie rods 8 passing through the hollow portion of the bottom formwork assembly 123, meeting the safety requirements for concrete pouring. See Figure 5 .

[0039] The hollow base plate 1 and detachable cover plate 2 of the array allow the lifting wire rope 9 to easily pass through the hollow base plate after beam fabrication, facilitating the hoisting and demolding of the precast beam 11. Specifically, after beam fabrication, the side mold 7 is removed; the wire rope 9 is threaded through the hollow part of the base plate 1; the flange connection between the cover plate 2 at the location of the wire rope 9 and the base plate 1 is removed; a protective tile 10 is placed at the bend of the wire rope 9; the lifting equipment then lifts the precast beam 11 out of the mold; after demolding, the cover plate 2 between the wire rope 9 and the precast beam 11 is reinstalled on the base plate 1. See [link to relevant documentation]. Figure 6 .

[0040] Bottom formwork camber adjustment: This can be achieved by adding or removing shims 5. Loosen the nuts of the anchor bolts 6, adjust the thickness of the shims 5, and then retighten the nuts of the anchor bolts 6. See below. Figure 7 , Figure 8 .

Claims

1. A prefabricated beam bottom formwork assembly with adjustable camber, span, and longitudinal slope, characterized in that: The bottom mold assembly comprises: a base plate (1), a cover plate (2), and a longitudinal slope adjustment module (3). The base plate (1) has a base plate bottom plate (1-1) connected to the end support column (1-2) and the middle support column (1-3) on the left and right sides of the base plate bottom plate (1-1). The base plate bottom plate (1-1) has a base plate fixing bolt hole (1-4) at the bottom. The end support column (1-2) and the middle support column (1-3) are stepped and have side openings. The cover plate (2) has a cover plate fixing flange (2-1) at the four corners. The cover plate (2) is available in various length sizes. The longitudinal slope adjustment module (3) is composed of a longitudinal slope adjustment module base plate (3-1), a longitudinal slope adjustment module shaft (3-2), a longitudinal slope adjustment module cover plate (3-3), and positioning bolts (3-4). The longitudinal slope adjustment module base plate (3-1) is composed of a longitudinal slope adjustment module base plate (3-1), a longitudinal slope adjustment module shaft (3-2), a longitudinal slope adjustment module cover plate (3-3), and positioning bolts (3-4). The base plate of the slope adjustment module consists of a bottom plate (3-11), a vertical steel plate (3-12), a top plate (3-13), and an adjusting nut (3-14). The base plate (3-1) of the slope adjustment module is equipped with a fixed flange (3-15) and a hinge seat (3-16). The cover plate (3-3) of the slope adjustment module consists of a cover panel (3-31) and a hinge seat (3-32).

2. The prefabricated beam bottom formwork assembly with adjustable camber, span, and longitudinal slope according to claim 1, characterized in that: Multiple base plates (1) are longitudinally connected as a whole by bolts; a cover plate (2) is installed on the support columns (1-2, 1-3) of the base plate (1); the cover plate fixing flange (2-1) is connected and fixed to the support columns (1-2, 1-3).

3. The prefabricated beam bottom formwork assembly with adjustable camber, span, and longitudinal slope according to claim 1, characterized in that: Multiple base plates (1) of the bottom formwork assembly (123) are vertically fixed to the concrete foundation (4) and the bottom plate fixing bolt holes (1-4) by anchor bolts (6). The overall arch of the bottom formwork is adjusted by adjusting the height of the pads (5) at different positions.

4. The prefabricated beam bottom formwork assembly with adjustable camber, span, and longitudinal slope according to claim 1, characterized in that: The longitudinal slope adjustment module base plate (3-1) and the longitudinal slope adjustment module cover plate (3-3) of the longitudinal slope adjustment module (3) are hinged together by the longitudinal slope adjustment module shaft (3-2). The positioning bolt (3-4) is installed on the longitudinal slope adjustment module adjusting nut (3-14). By adjusting the positioning bolt (3-4), the longitudinal slope of the beam bottom support plate can be adjusted.

5. A prefabricated beam bottom formwork assembly with adjustable camber, span, and longitudinal slope according to claim 1 or 2, characterized in that: The longitudinal slope adjustment module (3) and the cover plate (2) can be installed longitudinally on the base plate (1). The span of the bottom formwork can be adjusted by adjusting the installation position of the longitudinal slope adjustment module (3).

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