Prestressed rail type reinforcing steel bar mounting trolley base for shield tunnel

Abstract

The utility model relates to the technical field of trolley bases, and provides a shield tunnel prestress rail type reinforcing steel bar installation trolley base which comprises a steel top plate, vertical rods and a steel bracket, the bottom of the steel top plate is provided with a plurality of vertical rods, at least two horizontal rows and two longitudinal columns are arranged, and the lengths of the vertical rods in the same horizontal row are gradually increased to be matched with the radian of a tunnel. The bottom ends of the vertical rods are connected with the arc-shaped steel brackets to be attached to the bottom face of the tunnel, and a space for containing steel bars and steel strands is formed. A connecting hole is formed in the center of the steel top plate and connected with a cross arm bolt, and supporting and skid resistance between the two symmetrically-arranged bases are achieved. A positioning hole is formed in the center of the steel top plate and is in pressing connection with a trolley track through a pressing bolt for limiting and fixing. A positioning groove and a detachable welding positioning device are arranged at the bottom of the steel top plate, vertical rod welding positioning is rapidly completed through cooperation of a sliding positioning plate and the positioning groove, and dismounting and reuse are conducted after construction. Free movement of the trolley is achieved while steel bar installation precision is guaranteed, and the problems that a traditional base is hindered by steel bars, and rails are difficult to lay are solved.

Description

Technical Field

[0001] This utility model relates to the field of trolley base technology, and in particular to a prestressed track-type steel reinforcement installation trolley base for shield tunnels. Background Technology

[0002] In shield tunnel engineering, technologies such as prestressed steel bar positioning, prestressed steel strand tensioning sequence, and secondary tensioning stress control play an extremely important role in the long-distance prestressed concrete construction of deep-buried hydraulic tunnels. Under the premise of construction safety, improving the overall progress of tunnel prestressed steel bar and concrete construction is one of the key points and difficulties of this project. Unlike other tunnel-type trolley track laying, this project has a large number of steel bars and steel strands that seriously hinder the trolley track laying and are not conducive to the movement of the trolley.

[0003] Therefore, there is an urgent need for a prestressed track-type steel reinforcement installation trolley base for shield tunnels to facilitate the laying of trolley tracks and ensure the movement of the trolley while installing steel reinforcement strands. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a prestressed track-type rebar installation trolley base for shield tunnels, thereby improving construction efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A prestressed track-type rebar installation trolley base for a shield tunnel includes: a steel top plate, a plurality of uprights located at the bottom of the steel top plate, and a steel support at the bottom of each upright; the plurality of uprights consists of at least four uprights arranged in at least two horizontal rows and two vertical columns, with the uprights in the same vertical column having equal lengths, and the uprights in the same horizontal row having progressively increasing lengths, the increase in length matching the curvature of the shield tunnel; the bottom of the steel support is arc-shaped, the arc of which matches the curvature of the shield tunnel, and the bottom of the steel support rests on the bottom surface of the excavated tunnel; the space between the uprights accommodates the rebar of the shield tunnel.

[0007] Preferably, the bottom of the steel top plate is provided with at least two positioning grooves, the positioning grooves are rectangular grooves, and the top of the upright can slide along the positioning grooves.

[0008] Preferably, the steel top plate has two positioning holes at its center, and pressure plates are connected to the two positioning holes by bolts. One end of the pressure plate is placed between the bottom of the bolt and the top of the steel top plate, and the bottom of the other end of the pressure plate is pressed against the trolley track.

[0009] Preferably, the steel top plate has a connecting hole at its center, and the connecting hole is used to connect to one end of the crossbeam by bolts.

[0010] Preferably, a welding positioning device is detachably connected to the bottom of the steel top plate, and the welding positioning device is perpendicular to the positioning groove; the welding positioning device includes a positioning plate and a fixing bolt, the positioning plate is U-shaped and can slide along the bottom of the steel top plate; one end of the positioning plate is provided with a through threaded hole, and a fixing bolt is provided in the threaded hole, one end of the fixing bolt passes through the threaded hole and abuts against the side wall of the steel top plate, and the other end of the fixing bolt is provided with a handle.

[0011] This utility model discloses a prestressed track-type steel reinforcement installation trolley base for shield tunnels, which has the following beneficial effects.

[0012] This utility model includes a steel roof plate, uprights, and steel supports. Multiple uprights are installed at the bottom of the steel roof plate, in at least two horizontal rows and two vertical columns. The length of the uprights in the same horizontal row increases to match the curvature of the tunnel. The bottom of each upright connects to an arc-shaped steel support to fit the tunnel floor, forming a space to accommodate reinforcing bars and steel strands. A connecting hole in the center of the steel roof plate connects to a crossbeam bolt, providing support and preventing slippage between the symmetrically arranged bases. A positioning hole in the center of the steel roof plate is used to press the trolley track with a pressure plate bolt for positioning and fixation. A positioning groove and a detachable welded positioning device are installed at the bottom of the steel roof plate. The uprights are quickly welded and positioned using a sliding positioning plate that cooperates with the positioning groove. The device can be removed and reused after construction. This facilitates the laying of the trolley track, ensuring trolley movement while installing reinforcing bars and steel strands. It solves the problems of traditional bases being obstructed by reinforcing bars and difficult track laying, and combines the advantages of high construction efficiency and structural stability. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of a prestressed track-type steel reinforcement installation trolley base for a shield tunnel.

[0014] Figure 2 This is a schematic diagram of the overall structure of a prestressed track-type steel reinforcement installation trolley base for a shield tunnel.

[0015] Figure 3 This is a schematic diagram of the structure of Example 3.

[0016] Figure 4 This is another structural schematic diagram of Example 3.

[0017] Figure 5 A schematic diagram of the installation base of the prestressed rail-type steel reinforcement installation trolley for shield tunnels.

[0018] Figure 6 Another installation diagram of the prestressed rail-type steel reinforcement installation trolley base for shield tunnels.

[0019] In the attached diagram: 1. Steel roof plate; 101. Positioning groove; 102. Positioning hole; 103. Connecting hole; 2. Upright pole; 3. Steel support; 4. Crossbeam; 5. Bolt; 6. Pressure plate; 7. Welded positioning device; 701. Positioning plate; 702. Fixing bolt; 8. Excavated tunnel; 9. Shield tunnel reinforcement; 10. Trolley. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example 1

[0022] Reference Figure 1 , Figure 5 and Figure 6 As shown, a prestressed track-type rebar installation trolley base for a shield tunnel includes: a steel top plate 1, a plurality of uprights 2 disposed at the bottom of the steel top plate 1, and a steel support 3 disposed at the bottom of each upright 2; the plurality of uprights 2 are at least four, arranged in at least two horizontal rows and two vertical columns. In this embodiment, there are six uprights 2, arranged in two horizontal rows and three vertical columns. The lengths of the uprights 2 in the same vertical column are all equal, and the lengths of the uprights 2 in the same horizontal row gradually increase. The increase in the length of the uprights 2 matches the curvature of the shield tunnel. In this embodiment, the uprights 2 are made of Q235 steel pipe with a diameter of 32mm, and the increase in the length of the uprights 2 is 5.5cm; the steel top plate 1 is made of steel plate with a thickness of 50*50*10cm. The bottom of the steel support 3 is arc-shaped, and the arc of the bottom of the steel support 3 matches the arc of the shield tunnel. The bottom of the steel support 3 is placed on the bottom surface of the excavated tunnel 8. The space between the uprights 2 accommodates the shield tunnel reinforcement 9. This shield tunnel prestressed track-type reinforcement installation trolley base can facilitate the laying of the trolley 10 track and ensure the movement of the trolley 10 while the reinforcement strands are installed.

[0023] like Figure 2As shown, the two shield tunnel prestressed track-type steel reinforcement installation trolley bases form a group, and the two shield tunnel prestressed track-type steel reinforcement installation trolley bases are symmetrically arranged along the tunnel. Preferably, in this embodiment, the steel top plate 1 is provided with a connecting hole 103 in the center. The connecting hole 103 is connected to one end of the crossarm 4 by bolts 5. The crossarm 4 serves as a support between the two shield tunnel prestressed track-type steel reinforcement installation trolley bases to prevent the shield tunnel prestressed track-type steel reinforcement installation trolley bases from sliding along the tunnel.

[0024] like Figure 1 As shown, in this preferred embodiment, the steel top plate 1 has two positioning holes 102 at its center. The two positioning holes 102 are respectively connected to pressure plates 6 by bolts 5. One end of the pressure plate 6 is placed between the bottom of the bolt 5 and the top of the steel top plate 1, and the bottom of the other end of the pressure plate 6 is pressed against the track of the trolley 10 to provide a limit for the track of the trolley 10.

[0025] In this embodiment, before using the prestressed rail-type rebar installation trolley base for shield tunnels: a fixed rail base is placed to ensure that the trolley 10 can operate normally when put into use; during use: after the prestressed steel strands are installed, the trolley 10 needs to be moved forward, and the fixed rail supports the trolley 10 to stabilize it; after use: after the prestressed steel strands and rebars are installed, the rear rail base is removed and moved to the front of the trolley 10 for recycling. The prestressed rail-type rebar installation trolley base for shield tunnels will not affect the rebars of the tunnel and the roadway, allowing the trolley 10 to move freely in the tunnel. Example 2

[0026] Based on Example 1, such as Figure 2 As shown, in order to facilitate positioning during welding of the column, in this embodiment, the bottom of the steel top plate 1 is provided with at least two positioning grooves 101. The positioning grooves 101 are rectangular grooves, and the top of the column 2 can slide along the positioning grooves 101. The positioning grooves 101 assist in positioning the column 2 to facilitate welding. Example 3

[0027] Based on Example 2, such as Figure 3 and Figure 4As shown, preferably, to facilitate positioning during column welding, in this embodiment, a welding positioning device 7 is detachably connected to the bottom of the steel top plate 1. The welding positioning device 7 is perpendicular to the positioning groove 101. The welding positioning device 7 includes a positioning plate 701 and a fixing bolt 702. The positioning plate 701 is U-shaped and can slide along the bottom of the steel top plate 1. One end of the positioning plate 701 has a through threaded hole, and the fixing bolt 702 is provided in the threaded hole. One end of the fixing bolt 702 passes through the threaded hole and abuts against the side wall of the steel top plate 1. The other end of the fixing bolt 702 has a handle. When the column needs to be welded, the fixing bolt 702 is loosened to allow the positioning plate 701 to slide along the bottom of the steel top plate 1. After sliding to the designated position, the fixing bolt 702 is tightened to fix the positioning plate 701. At this time, the column can be quickly positioned by the positioning groove 101 in conjunction with the positioning plate 701. After the column is spot welded and fixed, the fixing bolt 702 is loosened and the positioning plate 701 is moved to the next position. After welding is completed, the welding positioning device 7 is removed.

[0028] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Substitutions may include replacements for some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the scope of protection of this utility model.

Claims

1. A prestressed track-type steel reinforcement installation trolley base for shield tunnels, characterized in that, include: A steel roof plate (1), several uprights (2) at the bottom of the steel roof plate (1), and a steel support (3) at the bottom of each upright (2); the several uprights (2) are at least four in number, arranged in at least two horizontal rows and two vertical columns, the uprights (2) in the same vertical column are of equal length, the uprights (2) in the same horizontal row gradually increase in length, and the increase in length of the uprights (2) matches the curvature of the shield tunnel; the bottom of the steel support (3) is arc-shaped, and the curvature of the bottom of the steel support (3) matches the curvature of the shield tunnel, and the bottom of the steel support (3) is placed on the bottom surface of the excavated tunnel (8); the space between the uprights (2) accommodates the shield tunnel reinforcement (9).

2. The prestressed track-type steel reinforcement installation trolley base for shield tunnels according to claim 1, characterized in that, The bottom of the steel top plate (1) is provided with at least two positioning grooves (101), the positioning grooves (101) are rectangular grooves, and the top of the upright (2) can slide along the positioning grooves (101).

3. A prestressed track-type steel reinforcement installation trolley base for shield tunnels according to claim 1 or 2, characterized in that, The steel top plate (1) has two positioning holes (102) in the center. The two positioning holes (102) are respectively connected to pressure plates (6) by bolts (5). One end of the pressure plate (6) is placed between the bottom of the bolt (5) and the top of the steel top plate (1), and the bottom of the other end of the pressure plate (6) is pressed onto the track of the trolley (10).

4. A prestressed track-type steel reinforcement installation trolley base for shield tunnels according to claim 1 or 2, characterized in that, The steel top plate (1) has a connecting hole (103) in the center, and the connecting hole (103) is connected to one end of the crossbeam (4) by a bolt (5).

5. The prestressed track-type steel reinforcement installation trolley base for shield tunnels according to claim 2, characterized in that, The bottom of the steel top plate (1) is detachably connected to a welding positioning device (7), which is perpendicular to the positioning groove (101). The welding positioning device (7) includes a positioning plate (701) and a fixing bolt (702). The positioning plate (701) is U-shaped and can slide along the bottom of the steel top plate (1). One end of the positioning plate (701) is provided with a through threaded hole, and a fixing bolt (702) is provided in the threaded hole. One end of the fixing bolt (702) passes through the threaded hole and abuts against the side wall of the steel top plate (1). The other end of the fixing bolt (702) is provided with a handle.

Images