Tunnel secondary lining double-folding template

Abstract

The invention discloses a tunnel secondary lining double-fold formwork which comprises a primary support, a tunnel concrete secondary lining formwork is arranged below the primary support, the outer side of the tunnel concrete secondary lining formwork is movably connected with a first formwork through a hinge, and the upper end of the first formwork is connected with a second formwork through a bolt. According to the method, the position of a second-lining trolley is determined firstly, a first formwork and a second formwork are connected through bolts, bolt holes of the first formwork are long-strip-shaped, the height of the bolt holes can be adjusted, the bolt holes are fixed, the position of a middle-buried type rubber water stop belt is determined according to the thickness of the tunnel concrete second-lining formwork, then the bolts are tightened, and the second formwork and a third formwork are connected through bolts as well. The bolt holes of the third formwork are also long-strip-shaped (the principle is the same as that of the first formwork and the second formwork), the overall height of the formworks can be adjusted, the formworks abut against a tunnel waterproof layer by adjusting the height, after work is completed, the end formwork is fixed through square timbers and pull rods, all the formworks are connected through bolts, and then installation of the end formwork is completed.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel secondary lining construction, in particular to a tunnel secondary lining double-folding template. Background Art

[0002] The end formwork needs to be installed during the construction of the tunnel secondary lining. One method is the top support structure of the tunnel secondary lining formwork, including the secondary lining formwork, adjustable plugging plate, top support seat and top support rod. Another method is the tunnel secondary lining double folding end formwork. The general tunnel secondary lining end formwork is mainly made of wooden formwork, which is easily deformed by impact during concrete pouring, causing some quality problems. The rubber waterstop is in the middle of the secondary lining concrete. If the end formwork is a wooden formwork, the position of the waterstop is not easy to control, and the waterstop is easy to deform during installation. When the secondary lining end formwork is a wooden formwork, on the one hand, the wood The consumption is large, and on the other hand, a series of tedious work such as mold matching, processing, installation, and fixing is required, which takes about 6 man-days. At the same time, the top support structure of the plugging plate of the existing tunnel secondary lining formwork has no hinge connection at the position of fixing the rubber waterstop, which is prone to dislocation during concrete pouring. The top support structure of the plugging plate of the existing tunnel secondary lining formwork has no adjustable device under the rubber waterstop. Since the rubber waterstop is buried, the existing technology can only be applied to the secondary lining structure with fixed thickness, and the scope of application is not wide. For this reason, we propose a tunnel secondary lining double folding formwork. Summary of the invention

[0003] The object of the present invention is to provide a tunnel double-lining double-folding template to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a tunnel secondary lining double-folding formwork, comprising an initial support, a tunnel concrete secondary lining formwork is arranged below the initial support, the outer side of the tunnel concrete secondary lining formwork is movably connected with formwork one through a hinge, and the upper end of formwork one is connected with formwork two through bolts, the bottom of the initial support is fixedly connected with formwork three, the lower end of formwork three is connected with formwork two through bolts, and an embedded rubber waterstop is arranged between the two formworks two.

[0005] Preferably, the initial support is an arc-shaped structure, and the material of the initial support is concrete.

[0006] Preferably, the inner surfaces of the template 2 and the template 3 are both provided with bolt holes, and the bolt holes are square structures.

[0007] Preferably, a rubber pad is fixedly connected to the bottom of the initial support and located on the outer side of the template three, and the material of the rubber pad is fluorocarbon rubber.

[0008] Preferably, the template 2 is an "L"-shaped structure, and the two templates 2 are connected by a hinge.

[0009] Preferably, the bottom of the initial support and the outer side of the template three are fixedly connected with square timber, and the square timber is connected to the template two below through a pull rod.

[0010] Preferably, an I-beam is fixedly connected to the bottom of the square timber, and an end of the I-beam is fixedly connected to the bottom of the tunnel concrete secondary lining formwork.

[0011] Preferably, the materials of the template three, template two and template one are all carbon steel, and the surfaces of the template three, template two and template one are all provided with a protective layer, and the protective layer includes a polytetrafluoroethylene coating and a polyvinyl chloride coating.

[0012] Preferably, the polytetrafluoroethylene coating is coated on the surfaces of template three, template two and template one, and the polyvinyl chloride coating is coated on the other side of the polytetrafluoroethylene coating.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention first determines the position of the second lining trolley, and template one and template two are connected by bolts. The bolt hole of template one is long and strip-shaped, and the height can be adjusted and fixed. The position of the embedded rubber waterstop is determined according to the thickness of the tunnel concrete second lining template and then the bolts are tightened. Template two and template three are also connected by bolts. The bolt hole of template three is also long and strip-shaped (the principle is the same as template one and template two). The overall height of the template can be adjusted, and the template can be supported against the tunnel waterproof layer by adjusting the height. After the above work is completed, the end mold is fixed with square wood and pull rods, and each template is connected with bolts to complete the installation of the end mold, thereby reducing the material consumption and construction workload, reducing the construction cost, and being able to well control the position of the embedded rubber waterstop and the deformation is always controlled within five millimeters to achieve a better water-stopping effect. At the same time, the efficiency of the end mold installation can be effectively improved, and only two people are needed to complete it, effectively reducing the labor cost.

[0015] 2. The present invention provides a protective layer, which includes a polyvinyl chloride coating that can perform a first layer of corrosion-resistant protection treatment on template three, template two and template one, and a polytetrafluoroethylene coating that can perform a second layer of corrosion-resistant protection treatment on template three, template two and template one after the polyvinyl chloride coating is damaged, thereby effectively improving the service life of template three, template two and template one. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0018] Figure 3This is a schematic diagram of the template after height adjustment of the present invention;

[0019] Figure 4 Schematic diagram of the protective layer structure of the present invention.

[0020] In the figure: initial support 1, formwork three 2, formwork two 3, formwork one 4, tie rod 5, square timber 6, I-beam 7, bolt hole 8, tunnel concrete second lining formwork 9, bolt 10, hinge 11, rubber pad 12, embedded rubber waterstop 13, protective layer 14, polytetrafluoroethylene coating 141, polyvinyl chloride coating 142. DETAILED DESCRIPTION

[0021] 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.

[0022] The initial support 1, formwork three 2, formwork two 3, formwork one 4, tie rod 5, square timber 6, I-beam 7, bolt hole 8, tunnel concrete second lining formwork 9, bolt 10, hinge 11, rubber pad 12, embedded rubber waterstop 13, protective layer 14, polytetrafluoroethylene coating 141 and polyvinyl chloride coating 142 components of the present application are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0023] Embodiment 1:

[0024] See also Figure 1-Figure 3, provides the following technical solution, specifically disclosed: including an initial support 1, a tunnel concrete secondary lining formwork 9 is arranged below the initial support 1, the outer side of the tunnel concrete secondary lining formwork 9 is movably connected with a formwork 1 4 through a hinge 11, and the upper end of the formwork 1 4 is connected with a formwork 2 3 through a bolt 10, the bottom of the initial support 1 is fixedly connected with a formwork 3 2, the lower end of the formwork 3 2 is connected with the formwork 2 3 through a bolt 10, and an embedded rubber water stop 13 is arranged between the two formworks 2 3, the initial support 1 is an arc structure, and the material of the initial support 1 is concrete, the formwork The inner surfaces of the second 3 and the template three 2 are both provided with bolt holes 8, and the bolt holes 8 are of a square structure. The bottom of the initial support 1 and the outer side of the template three 2 are fixedly connected with a rubber pad 12 to protect the waterproof layer, and the material of the rubber pad 12 is fluorocarbon rubber. The template two 3 is an "L"-shaped structure, and the two templates two 3 are connected by hinges 11. The bottom of the initial support 1 and the outer side of the template three 2 are fixedly connected with a square wood 6 to support the second lining end mold, and the square wood 6 is connected to the template two 3 below through a tie rod 5. The tie rod 5 can fix the square wood 6 and the second lining end mold. The square wood 6 The bottom is fixedly connected with an I-beam 7, which can support the square wood 6, and the end of the I-beam 7 is fixedly connected to the bottom of the tunnel concrete secondary lining template 9. First, determine the position of the secondary lining trolley. Template 1 4 and template 2 3 are connected by bolts 10. The bolt hole 8 of template 1 4 is long and the height can be adjusted and fixed. According to the thickness of the tunnel concrete secondary lining template 9, determine the position of the embedded rubber water stop 13 and then tighten the bolts 10. Template 2 3 and template 3 2 are also connected by bolts 10. The bolt hole 8 of template 3 2 is also long (the principle is the same as template 1 4). And template two 3), the overall height of the template can be adjusted, and the height can be adjusted to make the template support the tunnel waterproof layer. After the above work is completed, the end template is fixed with square wood 6 and pull rod 5, and each template is connected with bolts 10 to complete the installation of the end template, thereby reducing the material consumption and construction workload, reducing construction costs, and being able to well control the position of the embedded rubber waterstop 13 and the deformation is always controlled within five millimeters to achieve a better water-stopping effect. At the same time, the efficiency of the end template installation can be effectively improved, and only two people are required to complete it, effectively reducing labor costs.

[0025] Embodiment 2:

[0026] See also Figure 4, provides the following technical solution, specifically disclosed: the materials of template three 2, template two 3 and template one 4 are all carbon steel, the surfaces of template three 2, template two 3 and template one 4 are all provided with a protective layer 14, and the protective layer 14 includes a polytetrafluoroethylene coating 141 and a polyvinyl chloride coating 142, the polytetrafluoroethylene coating 141 is coated on the surface of template three 2, template two 3 and template one 4, and the polyvinyl chloride coating 142 is coated on the other side of the polytetrafluoroethylene coating 141, and a protective layer 14 is provided, the polyvinyl chloride coating 142 included in the protective layer 14 can perform a first layer of corrosion resistance protection treatment on template three 2, template two 3 and template one 4, and the polytetrafluoroethylene coating 141 can perform a second layer of corrosion resistance protection treatment on template three 2, template two 3 and template one 4 after the polyvinyl chloride coating 142 is damaged, thereby effectively improving the service life of template three 2, template two 3 and template one 4.

[0027] The working principle of the present application is as follows: first determine the position of the secondary lining trolley, the template 1 4 and the template 2 3 are connected by bolts 10, the bolt hole 8 of the template 1 4 is a long strip, the height can be adjusted and fixed, determine the position of the embedded rubber water stop 13 according to the thickness of the tunnel concrete secondary lining template 9 and then tighten the bolts 10, the template 2 3 and the template 3 2 are also connected by bolts 10, the bolt hole 8 of the template 3 2 is also a long strip (the principle is the same as that of the template 1 4 and the template 2 3), the overall height of the template can be adjusted, and the template can be supported against the tunnel waterproof layer by adjusting the height. After the above work is completed, the end mold is fixed with square wood 6 and pull rod 5, and each template is connected with bolts 10, that is, the installation of the end mold is completed. Thereby reducing the material usage and construction workload, the construction cost is reduced, and the position of the embedded rubber waterstop 13 can be well controlled and the deformation is always controlled within five millimeters to achieve a better water-stopping effect. At the same time, the efficiency of the end mold installation can be effectively improved, and only two people are needed to complete it, which effectively reduces the labor cost. A protective layer 14 is set, which includes a polyvinyl chloride coating 142 that can perform a first layer of corrosion-resistant protection treatment on template three 2, template two 3 and template one 4. The polytetrafluoroethylene coating 141 can perform a second layer of corrosion-resistant protection treatment on template three 2, template two 3 and template one 4 after the polyvinyl chloride coating 142 is damaged, thereby effectively improving the service life of template three 2, template two 3 and template one 4.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tunnel secondary lining double-folding formwork, comprising an initial support (1), characterized in that: A tunnel concrete second lining template (9) is arranged below the initial support (1), the outer side of the tunnel concrete second lining template (9) is movably connected to template one (4) via a hinge (11), and the upper end of template one (4) is connected to template two (3) via a bolt (10), the bottom of the initial support (1) is fixedly connected to template three (2), the lower end of template three (2) is connected to template two (3) via a bolt (10), and an embedded rubber water stop strip (13) is arranged between the two templates two (3).

2. A tunnel double lining double folding template according to claim 1, characterized in that: The initial support (1) is an arc-shaped structure, and the material of the initial support (1) is concrete.

3. A tunnel double lining double folding template according to claim 1, characterized in that: The inner surfaces of the second template (3) and the third template (2) are both provided with bolt holes (8), and the bolt holes (8) are of a square structure.

4. A tunnel double lining double folding template according to claim 1, characterized in that: A rubber pad (12) is fixedly connected to the bottom of the initial support (1) and located on the outer side of the template three (2), and the material of the rubber pad (12) is fluorocarbon rubber.

5. A tunnel double lining double folding template according to claim 1, characterized in that: The template two (3) is an "L"-shaped structure, and the two templates two (3) are connected by a hinge (11).

6. A tunnel double lining double folding template according to claim 1, characterized in that: A square timber (6) is fixedly connected to the bottom of the initial support (1) and located outside the template three (2), and the square timber (6) is connected to the template two (3) below via a pull rod (5).

7. A tunnel double lining double folding template according to claim 6, characterized in that: The bottom of the square timber (6) is fixedly connected to an I-beam (7), and the end of the I-beam (7) is fixedly connected to the bottom of the tunnel concrete secondary lining formwork (9).

8. A tunnel double lining double folding template according to claim 1, characterized in that: The materials of the template three (2), template two (3) and template one (4) are all carbon steel, and the surfaces of the template three (2), template two (3) and template one (4) are all provided with a protective layer (14), and the protective layer (14) includes a polytetrafluoroethylene coating (141) and a polyvinyl chloride coating (142).

9. A tunnel double lining double folding template according to claim 8, characterized in that: The polytetrafluoroethylene coating (141) is coated on the surfaces of the template three (2), the template two (3) and the template one (4), and the polyvinyl chloride coating (142) is coated on the other side of the polytetrafluoroethylene coating (141).

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