Tunnel floor low side wall steel bar protection layer thickness limiting mechanism

Abstract

The utility model relates to tunnel construction technology field, concretely relates to a kind of tunnel floor low side wall reinforcement cover thickness limiting mechanism, including reinforcement card, positioning card and adjusting mechanism, reinforcement card is equipped with several limiting card slots, positioning card is spaced apart with reinforcement card, positioning card can be connected with trestle bogie, adjusting mechanism includes adjusting rod and several adjusting pieces, adjusting rod passes through reinforcement card and positioning card, adjusting piece is threadedly connected with adjusting rod, adjusting piece and reinforcement card or positioning card abut. By the reinforcement card to the multiple reinforcement is held limiting, by adjusting mechanism, the reinforcement card is connected with the positioning card fixed on trestle bogie, the spacing between adjacent reinforcement and the spacing between reinforcement and trestle bogie can be stably limited, to ensure that accurate cover thickness is obtained, in addition, reinforcement deviation and cover deviation caused by discharging process can be effectively avoided, bottom plate concrete quality is improved, subsequent rectification and processing cost and time are reduced.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a mechanism for limiting the thickness of the protective layer of steel reinforcement in the short sidewall of a tunnel floor. Background Technology

[0002] Currently, the main structural form of the invert arch in domestic highway and railway tunnel engineering is invert arch lining concrete plus invert arch filling concrete, and the tunnel is mainly horseshoe-shaped. The lining bottom plate in the horseshoe-shaped tunnel is generally arc-shaped, and low sidewalls are set on both sides of the invert arch bottom plate. The invert arch bottom plate and the low sidewalls are mainly cast using a trolley. During the casting process, the thickness of the protective layer of the bottom plate lining steel reinforcement and the spacing of the steel reinforcement are important factors affecting the forming quality of the tunnel invert arch.

[0003] However, the reinforcing bars on the water-facing side of the invert arch are mostly in the form of dowel bars. The requirements for the thickness of the concrete cover and the spacing of the reinforcing bars are inconsistent in different tunnel constructions, making it difficult to control uniformly. The existing trestle trolleys generally do not have the design to limit the thickness of the reinforcing bars and the concrete cover. During the concrete pouring and discharge process, it is easy to cause deviations in the position of the reinforcing bars and the thickness of the concrete cover. If a limiting mechanism is set at the invert arch position, it will easily affect the smooth movement of the trestle trolley, making it impossible to meet the high standard of the concrete cover thickness and affecting the quality of the invert arch concrete. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of existing trestle trolleys, which do not have a design that limits the position and thickness of the reinforcing bars, making it difficult to accurately control the thickness of the bottom slab lining protective layer and the spacing of the reinforcing bars, thus affecting the quality of the invert arch. This utility model provides a limiting mechanism for the thickness of the reinforcing bar protective layer of the short sidewall of the tunnel bottom slab.

[0005] This utility model provides a mechanism for limiting the thickness of the protective layer of steel reinforcement in the short sidewall of a tunnel floor, including:

[0006] A rebar clamp, wherein the rebar clamp is provided with several limiting grooves;

[0007] Positioning plate, wherein the positioning plate and the steel bar plate are spaced apart, and the positioning plate can be connected to the trestle trolley;

[0008] An adjustment mechanism is provided, comprising an adjustment rod and several adjustment components. The adjustment rod passes through the reinforcing bar clamping plate and the positioning clamping plate. The adjustment components are threadedly connected to the adjustment rod and abut against the reinforcing bar clamping plate or the positioning clamping plate.

[0009] This utility model discloses a mechanism for limiting the thickness of the protective layer of steel reinforcement in the short sidewall of a tunnel floor. It uses a steel reinforcement clamping plate to hold and limit multiple steel reinforcements, stably restricting the spacing between adjacent steel reinforcements. Simultaneously, an adjustment mechanism connects the steel reinforcement clamping plate to a positioning clamping plate fixed on a trolley, further stably limiting the spacing between the steel reinforcements and the trolley, thus ensuring accurate protective layer thickness. Furthermore, because the steel reinforcements are stably limited during pouring, it effectively prevents steel reinforcement and protective layer deviations caused by material release, improving the quality of the floor slab concrete and reducing subsequent rectification and treatment costs and time.

[0010] Preferably, the adjusting member includes a mountain-shaped nut, at least one of the mountain-shaped nuts is disposed on the side of the positioning plate away from the reinforcing bar plate, and at least two of the mountain-shaped nuts abut against both sides of the reinforcing bar plate respectively.

[0011] Preferably, the positioning plate includes an L-shaped plate, the positioning plate is provided with a limiting hole, the adjusting rod passes through the limiting hole, the limiting hole includes a strip-shaped hole, and the long axis of the limiting hole is consistent with the length direction of the positioning plate.

[0012] Preferably, the positioning plate is provided with a reinforcing rod, which is arranged along the length direction of the positioning plate and is welded to the positioning plate.

[0013] Preferably, the reinforcing rod includes a steel bar segment, the steel bar segment having the same length as the positioning plate, and at least two reinforcing rods are respectively disposed on the upper and lower sides of the limiting hole.

[0014] Preferably, the positioning plate is provided with through holes for facilitating welding operations.

[0015] Preferably, the rebar clamping plate includes a first clamping plate and a second clamping plate arranged vertically. The first clamping plate and the second clamping plate are respectively provided with connecting holes adapted to the adjusting rod. The first clamping plate is provided with a plurality of first clamping slots, and the second clamping plate is provided with a plurality of second clamping slots. The first clamping slots and the second clamping slots are staggered.

[0016] Preferably, the reinforcing bar clamp has a plurality of connecting holes spaced apart along the longitudinal direction, and each connecting hole can be respectively provided with an adjusting rod.

[0017] Preferably, the connecting hole includes a strip-shaped hole, and the long axis of the connecting hole is aligned with the height direction of the reinforcing bar clamp.

[0018] Preferably, it also includes a standard distance ruler, which includes a steel rod with abutting surfaces at both ends and a handle on the steel rod. The standard distance ruler can be abutted between the reinforcing bar clamp and the positioning clamp.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model provides a mechanism for limiting the thickness of the protective layer of steel reinforcement in the short side wall of a tunnel floor. By using a steel reinforcement clamping plate to clamp and limit multiple steel reinforcements, it can stably limit the spacing between adjacent steel reinforcements.

[0021] 2. This utility model provides a limiting mechanism for the thickness of the concrete cover of the short side wall reinforcement in a tunnel floor. By adjusting the mechanism, the reinforcement clamping plate is connected to the positioning clamping plate fixed on the trolley, which can stably limit the distance between the reinforcement and the trolley, thereby ensuring that the accurate thickness of the concrete cover is obtained.

[0022] 3. This utility model provides a limiting mechanism for the thickness of the protective layer of the reinforcing bars in the short side wall of the tunnel floor. By stably limiting the position of the reinforcing bars and the distance between the reinforcing bars and the trestle trolley, it can effectively avoid the deviation of the reinforcing bars and the protective layer caused by the material feeding process, improve the quality of the concrete of the short side wall of the floor, and reduce the cost and time of subsequent rectification. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a structure limiting mechanism for the thickness of the protective layer of the steel reinforcement in the short side wall of a tunnel floor, as described in Example 1.

[0024] Figure 2 This is a top view of a tunnel floor slab short side wall reinforcement protective layer thickness limiting mechanism according to Embodiment 1.

[0025] Figure 3 This is a side view of a tunnel floor slab short side wall reinforcement protective layer thickness limiting mechanism according to Embodiment 1.

[0026] Figure 4 for Figure 3 A magnified structural diagram of part A in the middle.

[0027] Figure 5 This is a diagram showing the usage status of a tunnel floor slab short side wall reinforcement protective layer thickness limiting mechanism according to Example 1.

[0028] Figure 6 This is a schematic diagram of the standard distance ruler described in Example 1.

[0029] Marked in the image:

[0030] 1-Rebar clamping plate, 11-Limiting groove, 111-First groove, 112-Second groove, 12-First clamping plate, 13-Second clamping plate, 14-Connecting hole, 2-Positioning plate, 21-Limiting hole, 22-Through hole, 3-Adjusting mechanism, 31-Adjusting rod, 32-Adjusting component, 4-Reinforcing rod, 5-Tractor trolley, 6-Standard distance ruler, 61-Steel rod, 62-Abutting plane, 63-Handle. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0032] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer" used in the description of specific embodiments of this utility model to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0034] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0035] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0036] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0037] Example 1

[0038] This embodiment uses the construction of a tunnel floor lining as an example. The design requirement for the thickness of the concrete cover of the floor slab reinforcement is 5cm with a deviation of ±1.25cm, and the requirement for the spacing of the reinforcement is a deviation of 0.1 times d. The trolley 5 does not have any limiting measures for the position of the reinforcement and the thickness of the concrete cover. If a limiting mechanism is set on the side of the tunnel floor slab, it will easily affect the smooth movement of the trolley 5. To overcome this problem, this embodiment proposes a limiting mechanism for the thickness of the concrete cover of the short side wall reinforcement of the tunnel floor slab.

[0039] like Figures 1-5 As shown, a mechanism for limiting the thickness of the protective layer of steel reinforcement in the short sidewall of a tunnel floor includes a steel reinforcement clamping plate 1, a positioning clamping plate 2, and an adjustment mechanism 3. The steel reinforcement clamping plate 1 is provided with several limiting grooves 11. The positioning clamping plate 2 is spaced apart from the steel reinforcement clamping plate 1. The positioning clamping plate 2 can be connected to the trestle trolley 5. The adjustment mechanism 3 includes an adjustment rod 31 and several adjustment components 32. The adjustment rod 31 passes through the steel reinforcement clamping plate 1 and the positioning clamping plate 2. The adjustment components 32 are threadedly connected to the adjustment rod 31 and abut against the steel reinforcement clamping plate 1 or the positioning clamping plate 2.

[0040] like Figure 5 As shown, the positioning plate 2 is used to be set on the trestle trolley 5. It is connected to the rebar plate 1 through the adjustment mechanism 3. It can limit the relative distance between the outer main reinforcement of the tunnel floor slab and the trestle trolley 5. The positioning plate 2 can maintain a distance limited to the edge of the trestle trolley 5 during setting to ensure that the relative distance between the positioning plate 2 and the rebar plate 1 is accurately and quickly determined.

[0041] In an optional embodiment, the adjusting rod 31 can be a screw, and the adjusting component 32 can be a mountain-shaped nut. Three mountain-shaped nuts can be provided. One mountain-shaped nut is located on the side of the positioning plate 2 away from the rebar plate 1, and the other two mountain-shaped nuts abut against the two sides of the rebar plate 1 respectively. The relative distance between the positioning plate 2 and the rebar plate 1 can be limited and adjusted through the threaded connection between the mountain-shaped nuts and the adjusting rod 31.

[0042] In an optional embodiment, the positioning plate 2 can be an L-shaped steel plate. The positioning plate 2 is provided with a limiting hole 21, through which the adjusting rod 31 passes. The limiting hole 21 can be a strip-shaped hole, and the long axis of the limiting hole 21 is aligned with the length direction of the positioning plate 2. In use, the positioning plate 2 is installed after the rebar clamping plate 1. The positioning plate 2 can be moved within a certain range according to the actual situation to ensure that the positioning plate 2 and the rebar clamping plate 1 are positioned opposite each other, facilitating the quick installation of the adjusting mechanism 3.

[0043] In optional implementations, such as Figures 3-4 As shown, the positioning plate 2 is provided with a reinforcing rod 4, which is arranged along the length direction of the positioning plate 2 and welded to the positioning plate 2. The reinforcing rod 4 is used to strengthen the structure of the positioning plate 2 and prevent the positioning plate 2 from deforming during the length adjustment process of the adjustment mechanism 3, thus affecting the positioning result.

[0044] In an optional embodiment, the reinforcing rod 4 includes a steel bar segment, the steel bar segment being the same length as the positioning plate 2, and two reinforcing rods 4 being respectively disposed on the upper and lower sides of the limiting hole 21. The reinforcing rods 4 of the steel bar segment are welded to the positioning plate 2, thereby strengthening the overall structure of the positioning plate 2 with the limiting hole 21.

[0045] In an optional embodiment, the positioning plate 2 is provided with a through hole 22 for facilitating welding operations. The through hole 22 can be located on the bottom surface of the positioning plate 2 and extends through the positioning plate 2, so that welding can be performed quickly when the positioning plate 2 is fixed on the trolley 5.

[0046] like Figure 5 As shown, the rebar clamp 1 is used to clamp and limit the bottom plate rebar. Combined with the adjustment mechanism 3, it can ensure that the rebar maintains a stable distance from the edge of the formwork, ensure that the spacing between the rebars is stable, and ensure that the rebars are not prone to positional deviation during the concrete pouring process.

[0047] In an optional embodiment, the rebar clamping plate 1 may include a vertically arranged first clamping plate 12 and a second clamping plate 13. The first clamping plate 12 and the second clamping plate 13 are respectively provided with connecting holes 14 adapted to the adjusting rod 31. The first clamping plate 12 is provided with a plurality of first clamping slots 111, and the second clamping plate 13 is provided with a plurality of second clamping slots 112. The first clamping slots 111 and the second clamping slots 112 are staggered. The first clamping slots 111 and the second clamping slots 112 can be used to clamp the outer main bars of the bottom slab rebar, so that either the first clamping slot 111 or the second clamping slot 112 can be used to clamp the rebar according to the actual situation, thereby limiting the on-site rebar with two different spacing requirements and expanding the applicable range of the limiting mechanism. At the same time, the first clamping slot 111 can clamp the vertical outer main bars of the bottom slab rebar, and the second clamping slot 112 can be used to clamp the adjacent transverse bars, so as to achieve relative position stability between the rebar clamping plate 1 and the bottom slab rebar cage.

[0048] In an optional embodiment, the reinforcing bar clamp 1 can be an angle steel component.

[0049] In an optional embodiment, the first slot 111 and the second slot 112 can be arc-shaped slots or rectangular slots, and the first slot 111 and the second slot 112 respectively penetrate the edge of the steel bar clamping plate 1.

[0050] In an optional embodiment, the rebar clamping plate 1 has a plurality of connecting holes 14 spaced apart along the longitudinal direction, and each connecting hole 14 can be respectively provided with an adjusting rod 31. When the length of the rebar clamping plate 1 is long, the connection between the rebar clamping plate 1 and the positioning clamping plate 2 can be made by multiple adjusting mechanisms 3, thereby improving the overall structural stability of the limiting mechanism.

[0051] In an optional embodiment, the connecting hole 14 can be a strip-shaped hole, with the long axis of the connecting hole 14 aligned with the height direction of the rebar clamping plate 1, so that the adjusting rod 31 and the rebar clamping plate 1 can be adjusted relative to each other in the height direction, ensuring that the positioning clamping plate 2 and the rebar clamping plate 1 can be quickly and stably connected through the adjusting mechanism 3.

[0052] In an optional embodiment, the connecting hole 14 may be a circular hole.

[0053] In one or more implementations, such as Figure 6As shown, it may also include a standard distance ruler 6, which includes a steel rod 61. Both ends of the steel rod 61 have abutment surfaces 62, and a handle 63 is provided on the steel rod 61. The standard distance ruler 6 can be abutted between the rebar clamping plate 1 and the positioning clamping plate 2. The standard distance ruler 6 can be obtained by cutting the steel rod 61 according to the distance dimensions required by the construction design. The handle 63 on the standard distance ruler 6 facilitates use. During the installation of the positioning clamping plate 2, the standard distance ruler 6 can be used for quick positioning and installation, ensuring a uniform and accurate spacing between the positioning clamping plate 2 and the rebar clamping plate 1. During the pouring process, the standard distance ruler 6 can also be used to quickly detect the spacing between the positioning clamping plate 2 and the rebar clamping plate 1, preventing accidental movement of the rebar or positioning clamping plate 2 and enabling rapid detection.

[0054] In an optional implementation, the contact surfaces 62 at both ends of the standard distance ruler 6 can be smooth surfaces formed by grinding after cutting the steel rod 61.

[0055] This embodiment of a tunnel floor slab short sidewall reinforcement protective layer thickness limiting mechanism uses a reinforcement clamping plate 1 to hold the reinforcement bars during the binding of the invert arch reinforcement to control the reinforcement spacing. After the invert arch reinforcement and sidewall waterproofing work are completed, the invert arch short sidewall formwork is positioned. After the invert arch reinforcement and sidewall formwork are installed, the positioning clamping plate 2 and the reinforcement clamping plate 1 are assembled and connected. After the invert arch formwork is installed, the floor slab concrete and short sidewall concrete are poured. In this embodiment of the tunnel floor slab short sidewall reinforcement protective layer thickness limiting mechanism, multiple reinforcement bars are held and limited by the reinforcement clamping plate 1. This system can stably limit the spacing between adjacent reinforcing bars. At the same time, by adjusting the mechanism 3, the reinforcing bar clamping plate 1 is connected to the positioning clamping plate 2 fixed on the trolley 5, which can stably limit the spacing between the reinforcing bars and the trolley 5, thereby ensuring an accurate thickness of the reinforcing bar protective layer. In addition, since the reinforcing bars are stably limited during the pouring process, it can effectively avoid the deviation of the reinforcing bars and the protective layer caused by the material release process, improve the quality of the bottom slab and side wall concrete, reduce the cost and time of subsequent rectification, reduce the labor input for construction personnel, and greatly improve the construction production efficiency.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mechanism for limiting the thickness of the protective layer for the reinforcing steel bars in the short sidewall of a tunnel floor, characterized in that, include: The steel bar clamp (1) is provided with a plurality of limiting grooves (11); Positioning plate (2), the positioning plate (2) is spaced apart from the steel bar plate (1), and the positioning plate (2) can be connected to the trolley (5); Adjustment mechanism (3) includes adjustment rod (31) and several adjustment components (32). The adjustment rod (31) passes through the rebar clamping plate (1) and the positioning clamping plate (2). The adjustment components (32) are threadedly connected to the adjustment rod (31) and abut against the rebar clamping plate (1) or the positioning clamping plate (2).

2. The tunnel floor slab short sidewall reinforcement protective layer thickness limiting mechanism according to claim 1, characterized in that, The adjusting member (32) includes a mountain-shaped nut, at least one of the mountain-shaped nuts is disposed on the side of the positioning plate (2) away from the reinforcing bar plate (1), and at least two of the mountain-shaped nuts abut against both sides of the reinforcing bar plate (1).

3. The tunnel floor slab short sidewall reinforcement protective layer thickness limiting mechanism according to claim 1, characterized in that, The positioning plate (2) includes an L-shaped plate and a limiting hole (21). The adjusting rod (31) passes through the limiting hole (21). The limiting hole (21) includes a strip-shaped hole. The long axis of the limiting hole (21) is consistent with the length direction of the positioning plate (2).

4. The tunnel floor slab short sidewall reinforcement protective layer thickness limiting mechanism according to claim 3, characterized in that, The positioning plate (2) is provided with a reinforcing rod (4), which is arranged along the length direction of the positioning plate (2) and is welded to the positioning plate (2).

5. The tunnel floor slab short sidewall reinforcement protective layer thickness limiting mechanism according to claim 4, characterized in that, The reinforcing rod (4) includes a steel bar segment, the steel bar segment having the same length as the positioning plate (2), and at least two reinforcing rods (4) are respectively disposed on the upper and lower sides of the limiting hole (21).

6. The tunnel floor slab short sidewall reinforcement protective layer thickness limiting mechanism according to claim 3, characterized in that, The positioning plate (2) is provided with through holes (22) for cooperating with welding operations.

7. A thickness limiting mechanism for the protective layer of steel reinforcement in the short sidewall of a tunnel floor slab according to any one of claims 1-6, characterized in that, The steel bar clamp (1) includes a first clamp (12) and a second clamp (13) arranged vertically. The first clamp (12) and the second clamp (13) are respectively provided with connecting holes (14) adapted to the adjusting rod (31). The first clamp (12) is provided with a plurality of first slots (111), and the second clamp (13) is provided with a plurality of second slots (112). The first slots (111) and the second slots (112) are staggered.

8. The tunnel floor slab short sidewall reinforcement protective layer thickness limiting mechanism according to claim 7, characterized in that, The steel bar clamp (1) has a plurality of connecting holes (14) spaced apart along the longitudinal direction, and each connecting hole (14) can be provided with an adjusting rod (31).

9. A mechanism for limiting the thickness of the protective layer of steel reinforcement in the short sidewall of a tunnel floor as described in claim 8, characterized in that, The connecting hole (14) includes a strip-shaped hole, and the long axis of the connecting hole (14) is consistent with the height direction of the steel bar clamp (1).

10. A thickness limiting mechanism for the protective layer of steel reinforcement in the short sidewall of a tunnel floor as described in claim 7, characterized in that, It also includes a standard distance ruler (6), which includes a steel rod (61), with abutment planes (62) at both ends of the steel rod (61) and a handle (63) on the steel rod (61). The standard distance ruler (6) can abut between the steel bar clamp (1) and the positioning clamp (2).

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