A cantilevered triangular formwork suitable for curve frame tunnel trolley construction jointing

Abstract

This utility model discloses a cantilevered triangular formwork suitable for the overlapping of trolleys in curved frame tunnel construction. The cantilevered triangular formwork is set at the rear end of the top formwork and includes a cantilevered template, a cantilevered crossbeam, and a cantilevered longitudinal beam. The cantilevered longitudinal beam extends from the top longitudinal beam toward the rear end of the top formwork, the cantilevered crossbeam is set on the cantilevered longitudinal beam, and the cantilevered template is set on the cantilevered crossbeam. The cantilevered template is triangular in shape. Through this method, this utility model directly adds a cantilevered triangular formwork to the rear end of the top formwork, i.e., directly adds a cantilevered triangular formwork to the rear end of the trolley. Compared with the prior art, this utility model eliminates the need for secondary erection of supports and formwork during trolley construction on curved sections, thus avoiding secondary formwork in the triangular gap area, saving time and labor, and improving the integrity and safety of the single-formwork lining.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically a cantilevered triangular template suitable for the overlapping of curved frame tunnel trolleys. Background Technology

[0002] In recent years, with the continuous improvement of people's growing needs for a better life, the construction of at-grade intersections in urban road networks has reduced road traffic efficiency, while traffic noise has exacerbated the impact on surrounding residents. Therefore, the advantages of separated underpasses in urban traffic networks are becoming increasingly prominent. In tunnel construction, rectangular frame tunnels constructed using the cut-and-cover method have the advantages of convenient construction and high safety and quality assurance, and have broad application prospects in the development of modern urban road network structures.

[0003] Among them, existing formwork trolleys (referred to as trolleys) of the full-section trolley type are used for tunnel construction. Existing trolleys usually include a gantry system, formwork, etc. The gantry system includes gantry crossbeams, top crossbeams, top longitudinal beams, etc. The formwork includes top formwork, etc. The top longitudinal beam is set on the gantry crossbeam, the top crossbeam is set on the top longitudinal beam, and the top formwork is set on the top crossbeam.

[0004] However, when constructing the horizontal curve section of a rectangular frame tunnel using a trolley, it is often necessary to add formwork at the end of the outer sidewall and the top plate area to coordinate the arc difference between the inside and outside of the curve section. This results in a triangular gap area, which requires secondary erection of supports and formwork on the basis of the existing trolley formwork. That is, secondary formwork is required at the triangular gap where the trolley overlaps with the previous formwork, which is time-consuming and labor-intensive. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a cantilevered triangular formwork suitable for overlapping construction of curved frame tunnel trolleys. It can solve the problem that when the old and new formwork overlap during the construction of open-cut frame tunnel trolleys in horizontal curve sections, the outer and inner arc lengths of the horizontal curve section are different, resulting in the need to erect supports and formwork again on the foundation of the trolley in the triangular cantilever area.

[0007] (II) Technical Solution

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a cantilevered triangular template suitable for the construction and splicing of a curved frame tunnel trolley. The trolley includes a gantry beam, a top beam, a top longitudinal beam, and a top formwork. The top longitudinal beam is set on the gantry beam, the top beam is set on the top longitudinal beam, the top formwork is set on the top beam, and the cantilevered triangular template is set at the rear end of the top formwork. The cantilevered triangular template includes a cantilevered template, a cantilevered beam, and a cantilevered longitudinal beam. The cantilevered longitudinal beam is formed by extending from the top longitudinal beam toward the rear end of the top formwork. The cantilevered beam is set on the cantilevered longitudinal beam, and the cantilevered template is set on the cantilevered beam. The cantilevered template is triangular in shape.

[0009] Preferably, the cantilever formwork is a fixed steel formwork.

[0010] Preferably, the cantilevered triangular formwork also includes diagonal braces, which fix the cantilevered triangular formwork to the trolley.

[0011] Preferably, the diagonal brace is located at the end of the cantilevered longitudinal beam.

[0012] Preferably, the diagonal brace is a triangular diagonal brace.

[0013] Preferably, the cantilever formwork is mounted on the cantilever beam using a locking device.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a cantilevered triangular formwork suitable for the construction and splicing of trolleys in curved frame tunnels, which has the following beneficial effects: This utility model adopts a cantilever method to directly add a cantilevered triangular formwork at the rear end of the top formwork, that is, directly add a cantilevered triangular formwork at the rear end of the trolley. Compared with the prior art, this utility model eliminates the need for secondary erection of supports and formwork when the trolley is constructed on curved sections, thereby avoiding secondary formwork support in the triangular gap area, saving time and effort, and improving the integrity and safety of single-formwork lining. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first structure of a cantilevered triangular formwork suitable for the construction and splicing of a curved frame tunnel trolley according to the present invention.

[0017] Figure 2 This is a schematic diagram of the second structure of a cantilevered triangular formwork suitable for the construction and splicing of a curved frame tunnel trolley according to the present invention.

[0018] The numbers in the diagram are: 1 top horizontal beam, 2 top longitudinal beam, 3 top formwork, 4 cantilevered triangular formwork, 5 cantilevered formwork, 6 cantilevered horizontal beam, and 7 cantilevered longitudinal beam. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This utility model provides a cantilevered triangular formwork suitable for the construction and splicing of a curved frame tunnel trolley. The trolley includes a gantry beam, a top beam 1, a top longitudinal beam 2, and a top formwork 3. The top longitudinal beam 2 is set on the gantry beam, the top beam 1 is set on the top longitudinal beam 2, and the top formwork 3 is set on the top beam 1.

[0021] The aforementioned trolley is a formwork trolley, which typically includes a gantry system and formwork. Generally, the gantry system, from bottom to top, consists of two bottom main longitudinal beams, six gantry frames, multiple top longitudinal beams 2, multiple top transverse beams 1, several longitudinal connectors, scissor braces, ground support screws, and foldable ground-mounted brackets. Each gantry frame consists of a gantry column, a gantry transverse beam, and gantry diagonal braces. The six gantry frames are installed on the two bottom main longitudinal beams and form a spatial steel structure through longitudinal connectors and scissor braces. The top longitudinal beams 2 rest on the gantry transverse beams, and the top transverse beams 1 rest on the top longitudinal beams. Steel formwork, i.e., the top formwork 3, is installed on the top transverse beams 1. The translation and lifting legs are located at the sides of the gantry columns at both ends. The bottom longitudinal beams are equipped with ground-mounted screws, ground-mounted brackets, and travel drive cylinder tie plates. The template of the trolley typically includes a top formwork 3 and side formworks located on both sides of the top formwork 3, with the top formwork 3 and the side formworks connected by axle corner templates. Specifically, the trolley of this invention can be a type of template trolley such as a full-section template trolley from the prior art, and can be applied to tunnel construction; no further limitations are imposed here.

[0022] The aforementioned cantilevered triangular template 4 is located at the rear end of the top mold 3. The cantilevered triangular template 4 includes a cantilevered template 5, a cantilevered crossbeam 6, and a cantilevered longitudinal beam 7. The cantilevered longitudinal beam 7 extends from the top longitudinal beam 2 towards the rear end of the top mold 3. The cantilevered crossbeam 6 is mounted on the cantilevered longitudinal beam 7, and the cantilevered template 5 is mounted on the crossbeam 6. The cantilevered template 5 is triangular in shape. The cantilevered template 5 is as follows: Figure 1 The angle A shown can be 5-30 degrees, preferably 15 degrees.

[0023] It is understood that this utility model directly sets a cantilevered triangular template 4 at the rear end (i.e., the end) of the top formwork 3, that is, sets a cantilevered triangular template 4 at the rear end of the trolley. The cantilevered triangular template 4 is used to coordinate the difference in arc length between the inside and outside of the template when pouring the horizontal curve section. This utility model combines the template of the secondary formwork area with the top formwork 3 of the trolley. When pouring the curved section, the cantilevered triangular template 4 and the top formwork 3 of the trolley pour the structural concrete together, ensuring that the pouring length can reach 12m at one time, while avoiding secondary formwork in the triangular gap area, and improving the integrity and safety of the single formwork lining.

[0024] Preferably, the cantilever template 5 is a fixed steel mold.

[0025] Furthermore, preferably, the cantilevered triangular formwork 4 also includes diagonal braces, which fix the cantilevered triangular formwork 4 to the gantry system of the trolley or other locations to improve the rigidity of the cantilevered triangular formwork 4. Further, the diagonal braces can be installed at the ends of the cantilevered longitudinal beam 6. The diagonal braces are preferably triangular diagonal braces.

[0026] In addition, the cantilever formwork 5 is mounted on the cantilever beam 6 by a locking device; specifically, the locking device can be a hook bolt, or other types of locking devices can be used to connect the cantilever formwork 5 and the cantilever beam 6, without much restriction here.

[0027] Compared with the prior art, this utility model provides a cantilevered triangular formwork suitable for the construction and splicing of trolleys in curved frame tunnels, which has the following beneficial effects: This utility model adopts a cantilever method to directly add a cantilevered triangular formwork at the rear end of the top formwork, that is, directly add a cantilevered triangular formwork at the rear end of the trolley. Compared with the prior art, this utility model eliminates the need for secondary erection of supports and formwork when the trolley is constructed on curved sections, thereby avoiding secondary formwork support in the triangular gap area, saving time and effort, and improving the integrity and safety of single-formwork lining.

[0028] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cantilevered triangular formwork suitable for the overlapping of a trolley in the construction of a curved frame tunnel, the trolley comprising a gantry beam, a top beam, a top longitudinal beam, and a top formwork, wherein the top longitudinal beam is disposed on the gantry beam, the top beam is disposed on the top longitudinal beam, and the top formwork is disposed on the top beam, characterized in that: The cantilevered triangular template is located at the rear end of the top mold. The cantilevered triangular template includes a cantilever template, a cantilevered crossbeam, and a cantilevered longitudinal beam. The cantilevered longitudinal beam is formed by extending from the top longitudinal beam toward the rear end of the top mold. The cantilevered crossbeam is located on the cantilevered longitudinal beam. The cantilever template is located on the cantilevered crossbeam. The cantilever template is triangular in shape.

2. The cantilevered triangular formwork for overlapping sections of a curved frame tunnel trolley as described in claim 1, characterized in that: The cantilever template is a fixed steel mold.

3. The cantilevered triangular formwork for overlapping sections of a curved frame tunnel trolley as described in claim 1, characterized in that: The cantilevered triangular template also includes diagonal braces, which fix the cantilevered triangular template to the trolley.

4. The cantilevered triangular formwork for overlapping sections of a curved frame tunnel trolley as described in claim 3, characterized in that: The diagonal brace is located at the end of the cantilevered longitudinal beam.

5. The cantilevered triangular formwork for overlapping sections of a curved frame tunnel trolley as described in claim 3, characterized in that: The diagonal brace is a triangular diagonal brace.

6. The cantilevered triangular formwork for overlapping sections of a curved frame tunnel trolley as described in claim 1, characterized in that: The cantilever template is mounted on the cantilever beam by a locking device.

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