A type of small-section cast-in-place beam bottom formwork reverse-hanging truss

Abstract

This utility model provides a reverse-hanging truss for the bottom formwork of a small-section cast-in-place beam, belonging to the technical field of small-section cast-in-place beam construction for bridge superstructures. It includes side frame components and distribution beams. This utility model, through the design of the side frame components, extends outwards on both sides of its upper portion to form extension sections. When in use, the extension sections of the reverse-hanging truss structure formed by these side frame components and distribution beams are placed on temporary supports (sandboxes or mechanical jacks), eliminating the need for vertical supports and avoiding concerns about foundation bearing capacity and stability issues caused by excessive support height. Furthermore, this reverse-hanging truss structure is easy to process, install, and disassemble, safe and reliable, saves labor and materials, effectively improves work efficiency and turnover rate, and yields significant social and economic benefits.

Description

Technical Field

[0001] This utility model relates to the field of construction technology of small-section cast-in-place beams for bridge superstructure, specifically a bottom formwork inverted truss for small-section cast-in-place beams. Background Technology

[0002] At present, infrastructure construction such as transportation and waterway engineering is in a period of rapid development. Whether it is the frame structure of the wharf or the superstructure of the bridge, the construction of small cross-section cast-in-place beams is indispensable. However, during the construction of cast-in-place beams, the choice of formwork support for the bottom formwork of the cast-in-place beam is often limited due to the limitations of the construction site topography, geological conditions, and working height, which increases the difficulty of construction. To this end, this utility model provides a reverse-hanging truss for the bottom formwork of small cross-section cast-in-place beams. Utility Model Content

[0003] To address the issue of bottom support during the construction of small-section cast-in-place beams, this utility model provides a reverse-hanging truss for the bottom formwork of small-section cast-in-place beams.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A type of inverted truss for the bottom formwork of a small-section cast-in-place beam includes:

[0006] Two sets of side frame members are arranged in parallel and spaced apart, and the upper two sides of the side frame members extend outward to form extensions;

[0007] A distribution beam is fixedly connected between the two sets of side frame members and near the bottom of the side frame members;

[0008] Saddle support installed on the distribution beam.

[0009] As a further description of the above technical solution:

[0010] The side frame component includes:

[0011] Top chord members;

[0012] A lower chord member is located below the upper chord member and aligned with the center of the upper chord member, and the length of the upper chord member is greater than the length of the lower chord member;

[0013] Several vertical members that are fixedly connected between the upper chord member and the lower chord member.

[0014] As a further description of the above technical solution:

[0015] A tie rod connects two adjacent vertical members.

[0016] As a further description of the above technical solution:

[0017] Multiple sets of the distribution beams are arranged in parallel.

[0018] As a further description of the above technical solution:

[0019] The saddle support includes:

[0020] Saddle frame, which is secured to the distribution beam;

[0021] A square steel crossbeam has a through hole on its side below the distribution beam. The square steel crossbeam passes through the through hole and is fixedly connected to connecting lugs on both sides.

[0022] The top of the saddle frame is threaded with a locking screw.

[0023] As a further description of the above technical solution:

[0024] The bottom of the saddle frame is provided with a guide rail that bends outward.

[0025] The beneficial effects of this utility model are:

[0026] This utility model, through the design of side frame members, extends outward on both sides of its upper part to form an extension section. When in use, the extension section of the inverted truss structure composed of such side frame members and distribution beams can be placed on temporary supports (sandboxes or mechanical jacks), eliminating the need for vertical supports and eliminating concerns about foundation bearing capacity and the stability of the support due to excessive support height. Moreover, this inverted truss structure is easy to process, install, and disassemble, safe and reliable, saves labor and materials, and can effectively improve work efficiency and turnover rate, resulting in significant social and economic benefits. Attached Figure Description

[0027] To more clearly illustrate a reverse-hanging truss for the bottom formwork of a small-section cast-in-place beam, the following figures are shown;

[0028] Figure 1 This is a perspective view of the present utility model;

[0029] Figure 2 This is a front view of the present invention;

[0030] Figure 3 This is a side view of the present invention;

[0031] Figure 4 This is a three-dimensional schematic diagram of the saddle support component of this utility model.

[0032] The labels in the attached diagram;

[0033] 1. Side frame components; 101. Upper chord member; 102. Vertical member; 103. Diagonal tie member; 104. Lower chord member; 2. Distribution beam; 3. Saddle support components; 301. Saddle frame; 302. Guide saddle; 303. Horizontal through hole; 304. Locking screw; 305. Square steel crossbeam; 306. Connecting lug. Detailed Implementation

[0034] Please refer to the attached document. Figures 1-4 This illustration shows a reverse-hanging truss for the bottom formwork of a small-section cast-in-place beam provided in an embodiment of this application, used for support during the construction of the small-section cast-in-place beam, specifically including: side frame 1 and distribution crossbeam 2.

[0035] Two sets of side frame members 1 are arranged in parallel at intervals. The distribution beam 2 is fixedly connected between the two sets of side frame members 1 and close to the bottom of the side frame members 1, thus forming a truss structure. The upper two sides of the side frame members 1 are extended outward to form extensions. The extensions can be placed on temporary supports (sandboxes or mechanical jacks) to form an inverted truss structure to support the bottom formwork of the small cross-section cast-in-place beam. There is no need to set up vertical supports, and there is no need to consider the foundation bearing capacity and the stability of the support due to excessive support height. Moreover, the inverted truss structure is easy to process, install and disassemble, safe and reliable, saves labor and materials, and can effectively improve work efficiency and turnover rate, resulting in significant social and economic benefits.

[0036] In one embodiment, to further improve ease of use and enable quick installation / assembly of the template support, a saddle support 3 is designed. The saddle support 3 is installed on the distribution beam 2. The specific position and number of the saddle support 3 are determined by the actual required support rods. The bottom end of the template support rod is connected to the saddle support 3.

[0037] In one embodiment, the side frame 1 includes: an upper chord member 101, a lower chord member 104, and a plurality of vertical members 102; wherein, the lower chord member 104 is disposed below the upper chord member 101, and the lower chord member 104 is aligned with the center of the upper chord member 101, the length of the upper chord member 101 is greater than the length of the lower chord member 104, so that both ends of the upper chord member 101 extend outward to form an extension portion, and the plurality of vertical members 102 are fixedly connected between the upper chord member 101 and the lower chord member 104, so that the upper chord member 101, the lower chord member 104, and the plurality of vertical members 102 constitute an integral structure.

[0038] Among them, the upper chord member 101 is made of I32 I-beam with a height of 0.32m, the vertical member 102 is made of 10# channel steel with a length of 0.43m, the lower chord member 104 is made of I25 I-beam with a height of 0.25m, the overall height of the truss is 1.0m, the spacing between vertical members is 1.15~1.25m, and the spacing between the distribution beams is 0.5m.

[0039] In one embodiment, in order to further increase the stability of the structure composed of the upper chord member 101, the lower chord member 104 and several vertical members 102, a tie member 103 is connected between two adjacent vertical members 102.

[0040] In one embodiment, multiple sets of distribution beams 2 are arranged in parallel to form a flat frame structure for supporting the structural components at the bottom of the template.

[0041] In one embodiment, the saddle support 3 includes: a saddle frame 301, a saddle bracket 301, and a locking screw 304.

[0042] The saddle frame 301 is secured to the distribution beam 2, and a transverse through hole 303 is provided on the side of the saddle frame 301 and below the distribution beam 2. A square steel crossbar 305 is inserted into the transverse through hole 303, and connecting ears 306 are fixedly connected to both sides of the square steel crossbar 305. The square steel crossbar 305 is used to restrict the saddle frame 301 from being removed from the distribution beam 2. The connecting ears 306 are used to connect to the bottom of the template support. A locking screw 304 is threadedly connected to the top of the saddle frame 301. After the locking screw 304 is tightened, its bottom end abuts against the distribution beam 2, thereby fixing the saddle frame 301 to the distribution beam 2.

[0043] In one embodiment, the bottom of the saddle frame 301 is provided with a guide drag 302 that bends outward. The guide drag 302 is used to guide the saddle frame 301 downward to engage with the distribution beam 2, so as to facilitate its use when installing the saddle frame 301.

[0044] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0045] It should be understood that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. This invention is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A small cross-section cast-in-place beam bottom mold reverse crane truss, characterized in that, include: Two sets of side frame members (1) are arranged in parallel intervals, and the upper two sides of the side frame members (1) extend outward to form extensions; A distribution beam (2) is fixedly connected between the two sets of side frame members (1) and close to the bottom of the side frame members (1); Saddle support (3) installed on the distribution beam (2).

2. A small section cast-in-place beam bottom form counter-hanging truss according to claim 1, characterized in that, The side frame component (1) includes: Upper chord member (101); A lower chord member (104) is located below the upper chord member (101) and aligned with the center of the upper chord member (101), and the length of the upper chord member (101) is greater than the length of the lower chord member (104). Several vertical members (102) are fixedly connected between the upper chord member (101) and the lower chord member (104).

3. The inverted truss for the bottom formwork of a small-section cast-in-place beam according to claim 2, characterized in that: A tie rod (103) connects two adjacent vertical members (102).

4. The reverse truss of claim 1, wherein: The distribution beams (2) are arranged in multiple sets in parallel.

5. A small section cast-in-place beam bottom form counter-hanging truss according to claim 1, characterized in that, The saddle support (3) includes: Saddle frame (301), said saddle frame (301) is engaged on the distribution beam (2); A square steel crossbeam (305) is provided with a through hole (303) on the side of the saddle frame (301) and below the distribution beam (2). The square steel crossbeam (305) is inserted into the through hole (303), and connecting ears (306) are fixedly connected to both sides of the square steel crossbeam (305). The top of the saddle frame (301) is threaded with a locking screw (304).

6. A small section cast-in-place beam bottom form counter-hung truss according to claim 5, characterized in that: The bottom of the saddle frame (301) is provided with a guide saddle (302) that bends outward.

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