Concrete curing trolley and method for installing the concrete curing trolley
The concrete curing trolley with a standard and extended frame addresses the inefficiencies of conventional trolleys by enabling efficient assembly within enlarged tunnel sections, reducing costs and time through material reuse and continuous construction.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- TOKO KABUSHIKI KAISHA
- Filing Date
- 2025-12-22
- Publication Date
- 2026-05-11
AI Technical Summary
Conventional concrete curing trolleys for enlarged tunnel sections require new manufacturing or disassembly and reassembly, leading to high costs and inefficiencies due to the need for heavy machinery and labor-intensive processes, and interfere with other construction activities.
A concrete curing trolley with a standard section frame and an extended section frame, comprising curved and elongated members made of lightweight materials, allowing assembly within the enlarged section without disassembly, reducing the need for heavy machinery and enabling continuous construction.
The solution enhances material utilization efficiency, lowers processing costs, and maintains construction efficiency by allowing vehicles to pass through, thus reducing overall construction time and costs.
Smart Images
Figure 0007856273000001_ABST
Abstract
Description
Technical Field
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[0001] The present invention relates to a concrete curing carriage used for curing the lining concrete in tunnel construction and its installation method, and particularly to a concrete curing carriage applicable to an enlarged cross-section partially enlarged radially from the standard cross-section of a tunnel and its installation method.
Background Art
[0002] In mountain tunnel construction, after the lining concrete is demolded, a balloon curing method is used in which the surface of the lining concrete is covered with a curing balloon for curing. In the balloon curing method, the curing balloon arranged on the outer periphery of the concrete curing carriage is inflated, and the curing balloon is pressed against the inner surface of the lining concrete to hold it, thereby reducing the evaporation of moisture from the surface of the lining concrete and preventing the occurrence of cracks due to dry shrinkage to improve the construction quality (Patent Document 1) (Fig. 4). The balloon curing carriage has a substantially semi-cylindrical outer shape corresponding to the cross-sectional shape of the tunnel, and the curing work of the demolded lining concrete is sequentially advanced while moving toward the face side by the wheels provided at the lower part of the base. In the design of road tunnels, it is necessary to provide an emergency parking area (emergency roadside area), which is a space for disabled vehicles and emergency vehicles to park at intervals of several hundred meters in the tunnel axis direction. In the section of the emergency parking area, since the cross-sectional shape of the tunnel changes from the standard cross-section to an enlarged cross-section partially enlarged radially, in the prior art, separately from the concrete curing carriage for the standard cross-section part, a concrete curing carriage for the enlarged cross-section part with an outer shape corresponding to the enlarged cross-section is prepared, and this concrete curing carriage for the enlarged cross-section part is arranged in the enlarged cross-section part to cure the lining concrete.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] Conventional technology had the following problems: <1> To accommodate the cross-sectional shape of the enlarged section, it is necessary to either manufacture a dedicated concrete curing trolley for the enlarged section, or dismantle a concrete curing trolley designed for the standard section and reassemble it to match the shape of the enlarged section. If a new trolley is manufactured, procurement costs will be doubled compared to the standard section trolley, and if it is reassembled, dismantling, manufacturing additional structural members, and reassembling will incur significant labor and processing costs. <2> Because the concrete curing trolley for the enlarged section cannot pass through the standard section, the frame must be disassembled and transported into the standard section, where it is assembled using heavy machinery such as cranes. However, operating cranes underground is inefficient and time-consuming due to ceiling limitations, and construction vehicles cannot pass through the enlarged section during assembly, potentially delaying other processes and putting pressure on the overall construction period. <3> To change the curvature of the concrete curing trolley frame from a standard cross-section to an enlarged cross-section, it is necessary to individually change the connection angles of the multiple straight members that make up the frame, which requires considerable effort and processing costs for the manufacture and processing of the connecting members.
[0005] The object of the present invention is to provide a concrete curing trolley and a method for installing a concrete curing trolley that solve the problems of the conventional technology described above. [Means for solving the problem]
[0006] The concrete curing trolley of the present invention comprises a standard section frame having a substantially semi-cylindrical outer shape corresponding to a standard section, and an extended section frame that is partially extended radially from the standard section frame to correspond to an enlarged section, wherein the extended section frame comprises a plurality of curved support members, at least one end of which is connected to the standard section frame and which curves in the circumferential direction of the standard section frame and extends outward, a plurality of elongated spacing members that connect the standard section frame and the curved support members in the radial direction of the standard section frame, and a plurality of elongated extension connecting members that connect the plurality of curved support members or the plurality of spacing members in the front-rear direction of the standard section frame, wherein the curved support members are supported on the standard section frame by the plurality of spacing members, and the outer shape of the extended section frame is formed by the plurality of curved support members.
[0007] The concrete curing trolley of the present invention may have a curved support member made of a fiber-reinforced plastic pipe.
[0008] The concrete curing trolley of the present invention may have a sheathed pipe at its tip that can hold a curved support member, which is part of the spacing member.
[0009] The concrete curing trolley of the present invention may have an extended section frame that includes a plurality of elongated reinforcing members that connect the standard section frame and the spacing member downwards from the standard section frame, on the side of the standard section frame.
[0010] In the concrete curing trolley of the present invention, the reinforcing material may be a turnbuckle.
[0011] The present invention provides a method for installing a concrete curing trolley, comprising: a moving step of moving a standard section frame through a standard section into an enlarged section; and an assembly step of assembling an enlarged section frame by connecting a plurality of curved support members, a plurality of spacing members, and a plurality of extension connecting members to the standard section frame within the enlarged section. [Effects of the Invention]
[0012] The concrete curing trolley and the method for installing the concrete curing trolley of the present invention, based on the above structure, provide at least one of the following effects. <1> This structure utilizes a standard section frame, which is a concrete curing trolley for standard section concrete, as its foundation structure. By adding components to the standard section frame, the extended section frame is assembled, resulting in high material utilization efficiency. Furthermore, since the structure is completed simply by assembling the extended section frame, large heavy machinery such as cranes is unnecessary, resulting in higher work efficiency and lower processing costs compared to new fabrication or reassembly. <2> During the assembly of the extended section frame, construction vehicles can pass through the inside of the standard section frame, thus not interfering with other processes and contributing to a reduction in the overall construction period. <3> By constructing the outer shape of the expanded section frame using long, curved support members instead of a continuous series of straight members, a continuous outer shape along the expanded section can be easily constructed. Furthermore, compared to frames made by assembling conventional steel sections, the material cost is significantly lower, and the lightweight nature of the frame results in high construction efficiency. [Brief explanation of the drawing]
[0013] [Figure 1] Diagram illustrating a concrete curing trolley. [Figure 2] Explanation diagram of a standard cross section frame. [Figure 3] Diagram illustrating the extended section frame. [Figure 4] Diagram illustrating the conventional technology [Modes for carrying out the invention]
[0014] The concrete curing trolley and the method of installing the concrete curing trolley of the present invention will be described in detail below with reference to the drawings. In the present invention, unless otherwise specified, terms such as "height," "width," "front-to-back," "circumferential direction," "radial direction," and "axial direction" refer to the directions based on the approximately semi-cylindrical outer shape of the concrete curing trolley, with the axial direction of the semi-cylindrical shape being the front-to-back direction. [Examples]
[0015] [Concrete curing cart] <1> Overall structure (Figure 1) The concrete curing trolley 1 is a trolley for holding the curing balloon A on the inner surface of the masonry concrete in the enlarged cross-section of the tunnel. The concrete curing trolley 1 includes at least a standard cross-section pedestal 10 having an outer shape corresponding to the standard cross-section of the tunnel and an extended cross-section pedestal 20 having an outer shape corresponding to the enlarged cross-section of the tunnel. The concrete curing trolley 1 utilizes the standard cross-section pedestal 10 as a basic structure, and by connecting a plurality of members to the outside of the standard cross-section pedestal 10 to assemble the extended cross-section pedestal 20, it has one feature in that it constitutes an outer shape corresponding to the enlarged cross-section of the tunnel. By expanding the curing balloon A on the outer periphery of the concrete curing trolley 1 and injecting gas into the curing balloon A, the curing balloon A can be expanded according to the shape of the enlarged cross-section and adhered to the inner surface of the masonry concrete.
[0016] <1.1>Enlarged cross-section The enlarged cross-section is a part that is partially enlarged radially from the standard cross-section in the construction space of the tunnel. The enlarged cross-section is provided at a predetermined interval in the tunnel axis direction for uses such as an emergency parking zone which is a space for malfunctioning vehicles or emergency vehicles to park. In this example, the enlarged cross-section has a structure that expands to the right from the standard cross-section toward the face side. Note that the enlarged cross-section includes structures that expand to one side, both sides, or upward from the standard cross-section.
[0017] <2>Standard cross-section pedestal (Figure 2) The standard cross-section pedestal 10 is a pedestal having an outer shape corresponding to the standard cross-section of the tunnel. The standard cross-section pedestal 10 has a substantially semi-cylindrical outer shape. In this example, a concrete curing trolley for standard section sections is used as the standard section frame 10. Specifically, the standard section frame 10 is constructed by connecting multiple linear support members 11 made of structural steel with multiple indirect members 12 to form an arch structure, which is then connected axially with multiple connecting members 13 to form a roughly semi-cylindrical frame. Multiple reinforcing diagonal members 14 are placed at appropriate intervals inside the frame, and both lower ends of the frame are placed on two bases 15, with multiple wheels 16 attached to the lower part of the bases 15. The standard cross-section frame 10 can be moved along the tunnel axis using multiple wheels 16 by being placed on rail units B installed below the tunnel wall. The standard section support frame 10 can be used to cure the lining concrete of the standard section using curing balloons A.
[0018] <3> Extended section frame (Figure 3) The expanded section support frame 20 is a support frame with an external shape that corresponds to the enlarged section of the tunnel. The extended section frame 20 comprises at least a plurality of elongated curved support members 21, a plurality of elongated spacing members 22, and a plurality of elongated extension connecting members 23, and is constructed by partially extending radially from the upper part of the standard section frame 10. In this example, it further comprises a plurality of elongated reinforcing members 24. The extended section frame 20 consists of, for example, the following structure. Multiple spacing members 22 extend radially outward from the support member 11 or indirect member 12. The multiple spacing members 22 have progressively different lengths so that their tips form an arc-shaped outer form corresponding to the enlarged cross-section. The lowest spacing member 22 extends outward from the base 15. A long, curved support member 21 extends in an arc shape from one support member 11 or indirect member 12 of the standard section frame 10 to the opposite side of the standard section frame 10. The curved support member 21 connects at its intermediate section to the ends of multiple spacing members 22, and its end connects to the end of the lowest spacing member 22. Multiple extension connecting members 23, which are arranged in parallel along the curved support member 21, connect and integrate multiple curved support members 21 or spacing members 22 in the front-rear direction. On the side of the standard section frame 10, the support member 11 above the spacing member 22 and the spacing member 22 are connected by a reinforcing member 24. With the above structure, multiple spacing members 22 support the curved support members 21 on the standard section frame 10, and the multiple curved support members 21 constitute the outer shape of the extended section frame 20.
[0019] <3.1> Curved support material The curved support member 21 is a long member that constitutes the outer shape of the expanded section frame 20. In this example, fiber-reinforced plastic (FRP) pipes are used as the curved support material 21. FRP combines rigidity and corrosion resistance, and is lightweight, making it easy to handle on site. Furthermore, by using long pipes, it becomes possible to bend along the curvature of the enlarged cross-section. However, the curved support material 21 is not limited to fiber-reinforced plastic pipes; any material that can bend along the enlarged cross-section, such as a rigid polyvinyl chloride pipe, a metal pipe, or reinforcing bars, may also be used.
[0020] <3.2> Spacing material The spacing member 22 is a long member that supports the curved support member 21. The spacing member 22 is fixed at its base end to the support member 11 or the indirect member 12, and at its tip to the curved support member 21. The base end can be fixed by means of bolting, clamping, welding, etc. In this example, a long aluminum alloy bracket is used as the spacing member 22. The length of the bracket is individually set to correspond to the cross-sectional shape of the enlarged section. However, the spacing member 22 is not limited to an aluminum alloy bracket; it can be made of stainless steel, synthetic resin, or any other suitable material. Furthermore, a sheath tube 22a for holding the curved support member 21 may be attached to the tip of the spacing member 22.
[0021] <3.3> Extension connecting material The extension connecting member 23 is a long member that connects multiple curved support members 21 in the front-rear direction. The extension connecting member 23 is connected to the curved support member 21 or the spacing member 22 via a member such as an orthogonal clamp. In this example, a through pipe made of general structural steel is used as the extension connecting member 23. However, the extension connecting member 23 is not limited to being made of general structural steel; it may also be made of stainless steel, aluminum alloy, or the like.
[0022] <3.4> Reinforcement The reinforcing member 24 is a diagonal member that reinforces the spacing member 22. The reinforcing member 24 is installed on the side of the standard section frame 10 and is connected downward from the upper support member 11 to the lower spacing member 22. By having the reinforcing member 24 function as a diagonal member within the extended section frame 20, the tilting of the spacing member 22 and the torsional deformation of the extended section frame 20 can be reduced. In this example, a turnbuckle is used as the reinforcing member 24. The base end of the turnbuckle is fixed to the middle part of the support member 11 with a single clamp, and the tip of the turnbuckle is fixed to the middle part of the spacing member 22 with a single clamp. By using a turnbuckle as the reinforcing member 24, it is possible to adjust the distance between the support member 11 and the spacing member 22 to correct the distortion of the outer shape of the extended section frame 20.
[0023] <4> Installation method for concrete curing carts The concrete curing trolley 1 has one distinctive feature in its method of installation within the enlarged section. The method for installing a concrete curing trolley comprises at least a moving step S1 and an assembly step S2.
[0024] <4.1>Moving process The movement process S1 is the process of moving the standard section frame 10 through the standard section into the enlarged section. The movement process S1 is carried out, for example, as follows. The enlarged section is partially installed inside the tunnel, a considerable distance past the standard section from the tunnel entrance. Therefore, in its assembled state, the concrete curing trolley 1 cannot pass through the standard section and cannot move into the enlarged section. Therefore, in the movement process S1, the standard section frame 10, in its state before the expanded section frame 20 is installed on it, is placed on the rail unit B and moved through the standard section of the tunnel to move into the enlarged section. The standard section frame 10 can also be used for curing the lining concrete of the standard section.
[0025] <4.2> Assembly Process Assembly process S2 is the process of assembling the extended section frame 20 on the standard section frame 10 within the enlarged section. Assembly process S2 is carried out, for example, as follows. After the standard section frame 10 is brought into the enlarged section, multiple spacing members 22 are fixed to the outside of the standard section frame 10 within the enlarged section. In detail, in each row of the standard section frame 10 in the front-to-back direction, spacing members 22 are erected radially outward from the support members 11 or indirect members 12. One end of a curved support member 21 is fixed to the support member 11 or indirect member 12 on one side of the standard section frame 10, and it is extended across the standard section frame 10 while being curved, and fixed to the ends of multiple spacing members 22. Multiple curved support members 21 or spacing members 22 are connected in the front-to-back direction with multiple extension connecting members 23 to form the outer shape of the extended section frame 20. On the side of the standard section frame 10, reinforcing members 24 are connected downward from the support members 11 to the spacing members 22. The concrete curing trolley installation method of the present invention consists of moving the standard section frame 10 through the standard section to the enlarged section (movement step S1), and assembling the extended section frame 20 on the standard section frame 10 within the enlarged section (assembly step S2). Therefore, it has several advantages: (1) Compared to the conventional method of transporting the frame into the enlarged section in a disassembled state and assembling it from scratch using large heavy machinery such as a crane, the effort and time required for installation can be greatly reduced; (2) Construction vehicles can pass through the inside of the standard section frame 10 even during the assembly step S2, so it does not obstruct the movement of construction vehicles and does not interfere with other processes; and (3) The concrete curing trolley used for curing the lining concrete of the standard section can be reused as the standard section frame 10, so the processing cost is low and the material utilization efficiency is high. [Explanation of Symbols]
[0026] 1. Concrete curing cart 10 Standard Section Frame 11 Support material 12 Indirect materials 13 Connecting material 14 Diagonal 15 base 16 wheels 20 Extended Section Frame 21 Curved support material 22 Spacing material 22a Sheathed tube 23 Extension connecting material 24 Reinforcement material A protective balloon B Rail Unit S1 Moving process S2 Assembly process
Claims
1. A concrete curing trolley for holding curing balloons on the inner surface of tunnel lining concrete, for use in an enlarged section of the tunnel where the cross-sectional shape is partially expanded radially from the standard cross-sectional section, A standard cross-section frame having a roughly semi-cylindrical outer shape corresponding to the standard cross-section, The system includes an extended section frame which is partially extended radially from the standard section frame to correspond to the enlarged section, The extended section frame comprises a plurality of curved support members made of fiber-reinforced plastic pipes, at least one end of which is connected to the standard section frame and which curves in the circumferential direction of the standard section frame and extends outward; a plurality of elongated spacing members that connect the standard section frame and the curved support members in the radial direction of the standard section frame; and a plurality of elongated extension connecting members that connect the plurality of curved support members or the plurality of spacing members in the front-rear direction of the standard section frame. The curved support member is supported on the standard cross section frame by the plurality of spacing members, and the outer shape of the extended cross section frame is formed by the plurality of curved support members. Concrete curing cart.
2. The spacing member is characterized by having a sheath tube at its tip capable of holding the curved support member. The concrete curing trolley according to claim 1.
3. The extended section frame is characterized in that, on the side of the standard section frame, it comprises a plurality of elongated reinforcing members that connect the standard section frame and the spacing member downward from the standard section frame. The concrete curing trolley according to claim 1.
4. The reinforcing material is characterized in that it is a turnbuckle. The concrete curing trolley according to claim 3.
5. A method for installing a concrete curing trolley, wherein the concrete curing trolley described in any one of claims 1 to 4 is installed within the enlarged cross-section, A movement step of moving the standard section frame through the standard section into the enlarged section, The invention is characterized by comprising an assembly step of assembling the expanded section frame by connecting the plurality of curved support members, the plurality of spacing members, and the plurality of expansion connecting members to the standard section frame within the expanded section portion, How to set up a concrete curing trolley.