Simple dragging arched formwork and construction method thereof

Abstract

The invention relates to the technical field of open cut tunnel vault construction, in particular to an arched formwork for simple dragging and a construction method thereof.The arched formwork comprises a support structure and a formwork structure, the formwork structure is arranged on the outer side of the support structure, and a walking assembly used for pulling the formwork structure is arranged between the support structure and the formwork structure; the walking assembly comprises channel steel which is installed on the top of the support structure and used for limiting the walking direction, a roller set which corresponds to the channel steel, is fixed to the bottom of the formwork structure and used for walking in the channel steel, and a dragging device used for dragging the formwork structure. The problem that the working efficiency of multi-working-face construction and trolley construction is low is solved, the problem that the construction efficiency is low when a steel support is replaced during lining construction is solved, and high-quality rapid construction of the arched lining of the open-cut tunnel is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of open-cut tunnel vault construction, in particular to a simple dragging vault template and a construction method thereof. Background Art

[0002] Since entering the 21st century, my country has experienced an unprecedented period of rapid urban development.

[0003] In order to effectively alleviate the problem of insufficient urban construction space, urban planners and builders have begun to turn their attention to underground space, hoping to solve the spatial problem of urban development by rationally developing underground resources. The development and utilization of underground space is seen as an effective way to solve problems such as overcrowding in cities and ground traffic congestion. It can not only provide additional construction space, but also help optimize the layout of urban functions and improve the overall efficiency of urban operations.

[0004] In the current underground space development technology, open-cut tunnel construction is a common method. However, in the lining construction process of open-cut tunnels, lining trolleys are traditionally used for construction. This method requires the assembly of the trolley before construction can begin. Since open-cut tunnel construction usually involves multiple working faces, the use of trolleys for construction is not only costly, but also cumbersome in the walking steps of the trolleys, resulting in relatively low construction efficiency.

[0005] In addition, there are some other problems with trolley construction. For example, the assembly and disassembly process of the trolley is time-consuming and requires a lot of time and human resources. At the same time, the movement and positioning of the trolley at the construction site also require precise operation, which further increases the complexity and difficulty of construction. Therefore, although trolley construction can meet the needs of open-cut tunnel lining construction to a certain extent, its many problems and limitations also urgently need to be improved and solved.

[0006] In view of this, we propose a simple drag arch formwork and a construction method thereof. Summary of the invention

[0007] The object of the present invention is to provide a simple dragging arch formwork and a construction method thereof to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A method for simply dragging an arch formwork comprises a support structure and a formwork structure, wherein the formwork structure is arranged outside the support structure, and a walking component for pulling the formwork structure is provided between the support structure and the formwork structure, wherein the walking component comprises a channel steel installed on the top of the support structure for limiting the walking direction, a roller group fixed to the bottom of the formwork structure corresponding to the channel steel for walking in the channel steel, and a dragging device for dragging the formwork structure.

[0010] As a further solution of the present invention: the support structure includes a plurality of vertical poles and a plurality of horizontal poles, the vertical poles are arranged horizontally in the order of three poles with a spacing of 0.6m, eight poles with a spacing of 0.9m and three poles with a spacing of 0.6m, and the vertical poles are arranged longitudinally at a spacing of 1.2m; the horizontal poles are arranged at a spacing of 1.5m; in the top of the frame composed of the vertical poles and the horizontal poles, vertical diagonal poles are provided at every span.

[0011] As a further solution of the present invention: a diagonal brace is provided at the bottom of the support structure corresponding to the position of the channel steel, and the diagonal brace is fixed to the support structure by a fastener.

[0012] As a further solution of the present invention: the template structure includes an inner template and an outer template, and the inner template and the outer template are both assembled by splicing steel templates; a plurality of main ribs are arranged on the side of the inner template away from the outer template, and the horizontal distance of the main ribs corresponds to the vertical pole.

[0013] As a further solution of the present invention: a plurality of crown beams are provided above the formwork structure, and the traction device is fixed to a side of the crown beam close to the formwork structure; a steel plate is fixed to a side of the roller group away from the rotation of the roller, and the traction device includes a steel wire rope with one end fixed to the surface of the crown beam, and a hand winch is fixed to the other end of the steel wire rope, and a hook of the hand winch is fixed to the end of the steel plate.

[0014] A construction method for a simple dragging arch formwork, the use method of which is applicable to the simple dragging arch formwork according to any one of claims 1 to 5, comprising the following steps:

[0015] S1. Set up a support structure above the cast base plate;

[0016] S2. Set channel steel and arrange diagonal braces on the top of the support structure;

[0017] S3. Assemble the formwork structure and reinforce it with jacks on the support structure;

[0018] S4, construction of open cut tunnel arch lining;

[0019] S5. After installing the towing device, lower the height of the inner mold by using the jack, so that the roller group contacts the channel steel, and then the inner mold is dragged and moved.

[0020] As a further solution of the present invention: in the step S1, a bracket is set up on the cast bottom plate, and a wedge-shaped wooden block is used on the inclined support surface of the bottom plate to provide a bottom support.

[0021] As a further solution of the present invention: in step S5, there are no less than two anchoring points on the crown beam, and each steel wire rope is equipped with an internal stress monitoring device, and the optimal dragging distance is obtained through the horizontal distance between the template and the anchoring point and the internal stress of the steel wire rope.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] It is used for simple dragging of arch formwork. By setting up a walking component, the formwork structure is pulled and moved by the walking component, which solves the problems of multi-working surface construction and slow trolley construction efficiency, overcomes the difficult problem of low construction efficiency of replacing steel supports for construction lining, and realizes high-quality and rapid construction of arch lining in open-cut tunnels. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is an expanded view of the scouring trough structure of the present invention.

[0026] The meaning of each number in the figure is:

[0027] 100, support structure; 101, vertical pole; 102, horizontal pole; 103, vertical diagonal pole; 104, diagonal brace;

[0028] 200, walking assembly; 201, channel steel; 202, roller assembly; 203, steel plate; 210, traction device; 211, hand chain hoist; 212, wire rope;

[0029] 300, template structure; 301, inner mold; 302, outer mold; 303, main rib. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0031] Example

[0032] At present, open-cut tunnel construction is a common method in underground space development technology. However, in the lining construction process of open-cut tunnels, lining trolleys are traditionally used for construction. This method requires the assembly of the trolley before construction can begin. Since open-cut tunnel construction usually involves multiple working faces, the use of trolleys for construction is not only costly, but also cumbersome in the walking steps of the trolleys, resulting in relatively low construction efficiency. Therefore, Figure 1 and Figure 2 As shown, one of the purposes of this embodiment is to provide a simple and easy to pull arch template;

[0033] Since the overall structure needs to be built first during the lining construction of most open-cut tunnels, the overall structure is disclosed. The overall structure includes a support structure 100 and a template structure 300. The template structure 300 is arranged outside the support structure 100. A walking assembly 200 for pulling the template structure 300 is located between the support structure 100 and the template structure 300.

[0034] When the walking assembly 200 is a lining trolley, the construction of the trolley not only requires a large investment cost, but also the walking steps of the trolley are complicated, resulting in relatively low construction efficiency. Based on the above factors, the walking assembly 200 is improved so as to achieve the movement of the template structure 300 without using a lining trolley. Therefore, the walking assembly 200 includes a channel steel 201 installed on the top of the support structure 100 for limiting the walking direction, a roller group 202 corresponding to the channel steel 201 and fixed to the bottom of the template structure 300 for walking in the channel steel 201, and a towing device 210 for dragging the template structure 300;

[0035] Considering the convenience of installing the traction device 210, a plurality of crown beams are provided above the formwork structure 300, and the crown beams are arranged at intervals of 9m. The traction device 210 is fixed to the side of the crown beam close to the formwork structure 300; a steel plate 203 is fixed to the side of the roller group 202 away from the rotation of the rollers, and the traction device 210 includes a steel wire rope 212 fixed to the surface of the crown beam at one end, and a hand chain hoist 211 is fixed to the other end of the steel wire rope 212, and the hook of the hand chain hoist 211 is fixed to the end of the steel plate 203; by providing the traction device 210, the formwork structure 300 is pulled to move by the traction device 210, which solves the problems of multi-working surface construction and slow trolley construction efficiency, overcomes the difficulty of low construction efficiency of replacing steel supports for construction lining, and realizes high-quality and rapid construction of arch lining of open-cut tunnel;

[0036] Considering that when the roller group 202 moves in the channel steel 201, the weight of the inner mold 301 fixed to the roller group 202 acts on the support structure 100 completely through the channel steel 201. Therefore, considering the overall stability of the support structure 100 after being stressed, in order to avoid the overall collapse of the support structure 100 due to single-point stress, the bottom of the support structure 100 corresponding to the channel steel 201 is provided with a diagonal brace 104, and the diagonal brace 104 is fixed to the support structure 100 by fasteners;

[0037] Further, the support structure 100 is disclosed: the support structure 100 includes a plurality of vertical poles 101 and a plurality of horizontal poles 102, the vertical poles 101 are arranged horizontally in the order of three poles with a spacing of 0.6m, eight poles with a spacing of 0.9m and three poles with a spacing of 0.6m, and the vertical poles 101 are arranged longitudinally at a spacing of 1.2m; the horizontal poles 102 are arranged at a spacing of 1.5m; considering the stability of the top of the support structure 100, therefore, another layer of horizontal poles 102 is arranged on the top of the vertical poles 101, and vertical diagonal poles 103 are arranged at each span; at the same time, horizontal scissors braces are continuously arranged at the bottom of the support structure 100, and when the floor height of the support structure 100 is not more than 6m, scissors braces are continuously arranged at the bottom and top of the support structure 100.

[0038] Further, the formwork structure 300 is disclosed: the formwork structure 300 includes an inner form 301 and an outer form 302, both of which are spliced ​​and installed with 4-6 mm steel formwork; a plurality of main ribs 303 are provided on the side of the inner form 301 away from the outer form 302, the main ribs 303 are made of 120 mm double-jointed channel steel 201, and ten diagonal braces 104 are arranged circumferentially on the longitudinal main ribs 303 channel steel 201, and three full-length cross bars are evenly distributed vertically on the left and right outside the hidden beam of the arch foot, which are connected with fasteners; the horizontal distance of the main ribs 303 corresponds to the vertical pole 101; the outer form 302 is connected with the inner layer of the circumferential main reinforcement by HPB300Φ12 reinforcement, with a spacing of 60 cm, to ensure the overall stability of the outer form 302; the deformation joint of the arch top plate end formwork is made of standardized steel formwork, and the construction joint is made of wooden formwork.

[0039] The second purpose of this embodiment is to provide a construction method for a simple drag arch formwork, comprising the following steps:

[0040] S1, erecting a support structure 100 above the cast base plate;

[0041] S2, setting the channel steel 201 and laying the diagonal brace 104 on the top of the support structure 100;

[0042] S3, assembling the template structure 300 and reinforcing it with a jack on the support structure 100;

[0043] S4, construction of open cut tunnel arch lining;

[0044] S5. After installing the pulling device 210, the height of the inner mold 301 is lowered by a jack, so that the roller set 202 contacts the channel steel 201, and then the inner mold 301 is pulled and moved.

[0045] It needs further explanation:

[0046] Since the bottom plate may be tilted, a wedge-shaped wooden block is used on the inclined support surface of the bottom plate in S1 to provide bottom support, thereby making the support structure 100 more stable;

[0047] In S5, on the crown beam, the hand winch 211 is used to pull the inner mold 301 to move as a whole; before the inner mold 301 moves, it should be completely lowered to the top of the channel steel 201 of the support structure 100 under the command of a dedicated person, and at the same time, the support system should be checked for deformation or displacement to determine whether the walking component 200 is safe and effective; the specific specifications of the wire rope 212 for the walking component 200, the size and anchoring method of the hand winch 211, the number and method of the anchoring points should first be tested, and the specific data of the towing walking speed, the model of the hand winch 211, and the diameter of the wire rope 212 should be obtained through the test section and strictly implemented after approval by relevant parties; there should be no less than two anchoring points on the crown beam, and a wire rope 212 internal stress monitoring device should be equipped to monitor the horizontal distance between the inner mold 301 and the anchor point and the internal stress of the wire rope 212 through the stress monitoring device to obtain the optimal towing distance.

[0048] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0049] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A device for simply pulling an arched formwork, comprising a support structure (100) and a formwork structure (300), wherein the formwork structure (300) is arranged outside the support structure (100), and a walking component (200) is provided between the support structure (100) and the formwork structure (300) for pulling the formwork structure (300). Features: The walking assembly (200) comprises a channel steel (201) installed on the top of the support structure (100) for limiting the walking direction, a roller group (202) fixed to the bottom of the template structure (300) corresponding to the channel steel (201) for walking in the channel steel (201), and a towing device (210) for towing the template structure (300).

2. The simple dragging arch formwork according to claim 1, Features: The support structure (100) comprises a plurality of vertical poles (101) and a plurality of horizontal poles (102); the vertical poles (101) are arranged in the order of three poles with a spacing of 0.6m, eight poles with a spacing of 0.9m and three poles with a spacing of 0.6m in the transverse direction; the vertical poles (101) are arranged in the order of a spacing of 1.2m in the longitudinal direction; the horizontal poles (102) are arranged in the order of a spacing of 1.5m; and vertical diagonal poles (103) are arranged at each span in the top of the frame formed by the vertical poles (101) and the horizontal poles (102).

3. The simple dragging arch formwork according to claim 1, Features: The bottom of the support structure (100) is provided with an oblique brace (104) at a position corresponding to the channel steel (201), and the oblique brace (104) is fixed to the support structure (100) via a fastener.

4. The simple dragging arch formwork according to claim 1, Features: The template structure (300) comprises an inner template (301) and an outer template (302), wherein the inner template (301) and the outer template (302) are both assembled by splicing steel templates; a plurality of main ribs (303) are arranged on a side of the inner template (301) away from the outer template (302), and the horizontal distance of the main ribs (303) corresponds to the vertical pole (101).

5. The simple dragging arch formwork according to claim 1, Features: A plurality of crown beams are arranged above the template structure (300), and the pulling device (210) is fixed to a side of the crown beam close to the template structure (300); a steel plate (203) is fixed to a side of the roller group (202) away from the rotation of the rollers, and the pulling device (210) comprises a steel wire rope (212) with one end fixed to the surface of the crown beam, and a hand chain hoist (211) is fixed to the other end of the steel wire rope (212), and a hook of the hand chain hoist (211) is fixed to the end of the steel plate (203).

6. A construction method for a simple drag arch formwork, wherein the method of use is applicable to the simple drag arch formwork according to any one of claims 1 to 5, Features: The following steps are included: S1. erecting a support structure (100) above the cast bottom plate; S2. Arrange channel steel (201) and arrange diagonal braces (104) on the top of the support structure (100); S3, assembling the template structure (300) on the support structure (100) and reinforcing it with a jack; S4, construction of open cut tunnel arch lining; S5. After installing the pulling device (210), the height of the inner mold (301) is lowered by a jack, so that the roller set (202) contacts the channel steel (201), and then the inner mold (301) is pulled and moved.

7. The construction method for simple dragging arch formwork according to claim 6, Features: In the step S1, a bracket is set up on the cast bottom plate, and a wedge-shaped wooden block is used on the inclined support surface of the bottom plate to provide a bottom support.

8. The construction method for simple dragging arch formwork according to claim 6, Features: In step S5, there are no less than two anchoring points on the crown beam, and each steel wire rope (212) is equipped with an internal stress monitoring device, and the optimal dragging distance is obtained through the horizontal distance between the template and the anchoring point and the internal stress of the steel wire rope (212).

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