Lifting and positioning device for open cut tunnel lining inverted arch steel reinforcement framework

Abstract

The utility model discloses an open cut tunnel lining inverted arch steel bar framework lifting and positioning device which comprises a portal steel frame and lifting steel bars, the portal steel frame stretches across the upper portion of an inverted arch steel bar structure and stands on the surface of the top of an inverted arch foundation, and the thickness of the portal steel frame in the axial direction of an inverted arch is larger than or equal to the length of the inverted arch structure needing to be poured in a single time. The lifting steel bars are distributed and connected to the lower portion of the top of the portal frame and vertically extend downwards, the lower ends of the lifting steel bars are welded to different axial steel bars so as to lift the axial steel bars, and the heights of the lower ends of the lifting steel bars are matched with the heights of the axial steel bars needing to be connected. The axial reinforcing steel bars are lifted through the portal steel frame and the lifting reinforcing steel bars, after inverted arch pouring is completed, the parts, buried in concrete, of the lifting reinforcing steel bars are cut off, and compared with a traditional axial reinforcing steel bar positioning method that triangular reinforcing steel bar frames are welded and installed, each mold only needs to consume the short-cut lifting reinforcing steel bars with the same number as that of the triangular reinforcing steel bar frames, so that the construction cost is reduced, and the construction efficiency is improved. The cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fixing an inverted arch steel bar frame, in particular to a lifting and positioning device for an open hole lining inverted arch steel bar frame. Background Art

[0002] In the case of shallow tunnel burial depth and thin overlying rock mass, in order to avoid the occurrence of disasters such as collapse, rockfall, landslide, mud-rock flow, etc. on the side slope and back slope, it is not appropriate to use the traditional dark excavation method, but the open excavation method should be used to excavate the tunnel. The tunnel structure built by this open excavation method is usually called an open hole, which has good integrity and can withstand greater vertical and lateral pressure.

[0003] The invert is one of the main components of the tunnel structure and is the foundation of the tunnel structure. On the one hand, it effectively transfers the stratum pressure above the tunnel to the underground through the tunnel side wall structure or the load on the road surface, and on the other hand, it effectively resists the reaction force from the stratum below the tunnel.

[0004] In the construction of the invert, Figure 5 , 6 As shown in , 7, the traditional inverted arch reinforcement skeleton binding process requires manual welding of triangular reinforcement frames 100, and after the tunnel axial reinforcement is positioned and installed, the arch reinforcement is installed. The triangular reinforcement frames 100 do not play a force-bearing role in the inverted arch reinforcement skeleton, and are only used to position and support the reinforcement skeleton before the inverted arch concrete is poured. The cost is extremely high. During the pouring process, a large number of triangular reinforcement frames 100 are buried and difficult to reuse, resulting in a waste of resources. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model aims to provide a lifting and positioning device for a steel bar skeleton of an open hole lining invert.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A lifting and positioning device for an open hole lining inverted arch reinforcement skeleton comprises a portal steel frame and lifting steel bars, wherein the portal steel frame spans over the inverted arch reinforcement structure and stands on the top surface of the inverted arch foundation, the thickness of the portal steel frame in the axial direction of the inverted arch is greater than or equal to the length of the inverted arch structure that needs to be cast in a single time, a plurality of lifting steel bars are distributed and connected below the top of the portal steel frame and all extend vertically downward, the lower ends of the plurality of lifting steel bars are respectively welded to different axial steel bars to lift the axial steel bars, and the heights of the lower ends of the plurality of lifting steel bars respectively match the heights of the axial steel bars that need to be connected.

[0008] Preferably, the pulling steel bar includes an upper hanging steel bar, a lower connecting steel bar and a connecting sleeve, the upper hanging steel bar is connected below the top of the portal steel frame and extends vertically downward, the lower connecting steel bar is welded to the axial steel bar and extends vertically upward, and the bottom end of the upper hanging steel bar and the top end of the lower connecting steel bar are respectively detachably connected to the upper and lower ends of the connecting sleeve.

[0009] Preferably, an internal thread is provided in the connecting sleeve, and the bottom end of the upper hanging steel bar and the top end of the lower connecting steel bar are respectively threadedly connected to the upper and lower ends of the connecting sleeve.

[0010] Preferably, the portal steel frame includes a bottom support beam, support columns and a top cross beam, the two bottom support beams are parallel to the axial direction of the inverted arch, and the two bottom support beams are respectively arranged on the top surface of the inverted arch foundation at positions on both sides of the inverted arch steel structure, a number of support columns are respectively aligned and vertically arranged on the two bottom support beams, and a number of top cross beams are respectively connected between the top ends of two support columns aligned with each other on the two bottom support beams.

[0011] Preferably, a top longitudinal beam perpendicular to the top cross beam is arranged above the top cross beam, and the top longitudinal beam is connected to all the top cross beams.

[0012] Preferably, diagonal braces are provided at the connection between the top cross beam and the top ends of the two supporting columns.

[0013] Preferably, a movable wheel group is respectively provided at the bottom of the two bottom support beams, and a steel rail extending along the axial direction of the inverted arch is respectively provided at positions on both sides of the inverted arch reinforcement structure on the top surface of the inverted arch foundation, and the two bottom support beams are respectively connected to the two steel rails through the movable wheel groups at their bottoms.

[0014] Beneficial effects of the utility model:

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The utility model lifts the axial steel bars by means of a portal steel frame and lifting steel bars, and after the invert arch is cast, the part of the lifting steel bars buried in the concrete is cut off. Compared with the traditional axial steel bar positioning method of welding and installing a triangular steel bar frame, each mold only needs to consume the same number of short-cut lifting steel bars as the triangular steel bar frame, which greatly saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the utility model in working state;

[0019] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0020] Figure 4 A plan view of the utility model in working state;

[0021] Figure 5 It is a structural schematic diagram of the prior art;

[0022] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0023] Figure 7 This is a plan view of the prior art.

[0024] 1. Portal steel frame; 11. Bottom support beam; 12. Support column; 13. Top cross beam; 14. Top longitudinal beam; 15. Diagonal brace; 2. Lifting steel bar; 21. Upper hanging steel bar; 22. Lower connecting steel bar; 23. Connecting sleeve; 3. Inverted arch foundation; 4. Axial steel bar; 5. Moving wheel set; 6. Steel rail; 100. Triangular steel frame. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-4 The utility model provides a technical solution: a lifting and positioning device for an open hole lining inverted arch reinforcement skeleton, comprising a portal steel frame 1 and lifting steel bars 2, wherein the portal steel frame 1 spans over the inverted arch reinforcement structure and stands on the top surface of the inverted arch foundation 3, the thickness of the portal steel frame 1 in the axial direction of the inverted arch is greater than or equal to the length of the inverted arch structure that needs to be cast in a single time, a plurality of lifting steel bars 2 are distributed and connected below the top of the portal steel frame 1 and all extend vertically downward, the lower ends of the plurality of lifting steel bars 2 are respectively welded to different axial steel bars 4 to lift the axial steel bars 4, and the heights of the lower ends of the plurality of lifting steel bars 2 are respectively matched with the heights of the axial steel bars 4 that need to be connected.

[0027] The utility model lifts the axial steel bars 4 through the portal steel frame 1 and the lifting steel bars 2. After the invert arch is cast, the part of the lifting steel bars 2 buried in the concrete can be cut off. Compared with the traditional method of positioning the axial steel bars 4 by welding and installing the triangular steel bar frame 100, each mold only needs to consume the same number of short-cut lifting steel bars 2 as the triangular steel bar frame 100, which greatly saves costs.

[0028] Furthermore, the pulling steel bar 2 includes an upper hanging steel bar 21, a lower connecting steel bar 22 and a connecting sleeve 23. The upper hanging steel bar 21 is connected to the bottom of the top of the portal steel frame 1 and extends vertically downward. The lower connecting steel bar 22 is welded to the axial steel bar 4 and extends vertically upward. The bottom end of the upper hanging steel bar 21 and the top end of the lower connecting steel bar 22 are respectively detachably connected to the upper and lower ends of the connecting sleeve 23. When in use, the length of the lower connecting steel bar 22 is set according to the height of the poured concrete. After the arch is poured, the connecting sleeve 23 can be removed from the lower connecting steel bar 22, which is easy to disassemble.

[0029] Specifically, an internal thread is provided in the connecting sleeve 23 , and the bottom end of the upper end hanging steel bar 21 and the top end of the lower end connecting steel bar 22 are respectively threadedly connected to the upper and lower ends of the connecting sleeve 23 .

[0030] Furthermore, the portal steel frame 1 includes a bottom support beam 11, support columns 12 and a top cross beam 13, the two bottom support beams 11 are parallel to the axial direction of the inverted arch, and the two bottom support beams 11 are respectively arranged on the top surface of the inverted arch foundation 3 at positions on both sides of the inverted arch steel structure, a number of support columns 12 are respectively aligned and vertically arranged on the two bottom support beams 11, and a number of top cross beams 13 are respectively connected between the top ends of the two support columns 12 aligned with each other on the two bottom support beams 11.

[0031] Furthermore, a top longitudinal beam 14 perpendicular to the top cross beam 13 is arranged above the top cross beam 13 , and the top longitudinal beam 14 is connected to all the top cross beams 13 , so that the portal steel frame 1 is firmly connected.

[0032] Furthermore, diagonal braces 15 are provided at the connection points between the top cross beam 13 and the top ends of the two supporting columns 12 to improve the structural stability of the portal steel frame 1 .

[0033] Furthermore, a movable wheel set 5 is respectively provided at the bottom of the two bottom support beams 11, and a steel rail 6 extending along the axial direction of the inverted arch is respectively provided at positions on both sides of the inverted arch reinforcement structure on the top surface of the inverted arch foundation 3. The two bottom support beams 11 are respectively connected to the two steel rails 6 through the movable wheel sets 5 at the bottom thereof. After a section of the inverted arch is cast, it is convenient to move the portal steel frame 1 forward to the next section to lift the inverted arch reinforcement skeleton.

[0034] 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 lifting and positioning device for a steel bar skeleton of an open hole lining invert, characterized in that: The invention comprises a portal steel frame (1) and lifting steel bars (2), wherein the portal steel frame (1) spans above the inverted arch steel bar structure and stands on the top surface of the inverted arch foundation (3), the thickness of the portal steel frame (1) in the axial direction of the inverted arch is greater than or equal to the length of the inverted arch structure to be cast in a single time, a plurality of lifting steel bars (2) are distributed and connected below the top of the portal steel frame (1) and extend vertically downward, the lower ends of the plurality of lifting steel bars (2) are respectively welded to different axial steel bars (4) to lift the axial steel bars (4), and the heights of the lower ends of the plurality of lifting steel bars (2) respectively match the heights of the axial steel bars (4) to be connected.

2. The lifting and positioning device for the steel bar skeleton of an open hole lining invert according to claim 1 is characterized in that: The pulling steel bar (2) comprises an upper hanging steel bar (21), a lower connecting steel bar (22) and a connecting sleeve (23), wherein the upper hanging steel bar (21) is connected to the bottom of the top of the portal steel frame (1) and extends vertically downward, and the lower connecting steel bar (22) is welded to the axial steel bar (4) and extends vertically upward, and the bottom end of the upper hanging steel bar (21) and the top end of the lower connecting steel bar (22) are respectively detachably connected to the upper and lower ends of the connecting sleeve (23).

3. The lifting and positioning device for the steel bar skeleton of an open hole lining invert according to claim 2 is characterized in that: The connecting sleeve (23) is provided with an internal thread, and the bottom end of the upper end hanging steel bar (21) and the top end of the lower end connecting steel bar (22) are respectively threadedly connected to the upper and lower ends of the connecting sleeve (23).

4. The lifting and positioning device for the steel bar skeleton of an open hole lining invert according to claim 1 is characterized in that: The portal steel frame (1) comprises a bottom support beam (11), a support column (12) and a top cross beam (13); the two bottom support beams (11) are parallel to the axial direction of the inverted arch, and the two bottom support beams (11) are respectively arranged on the top surface of the inverted arch foundation (3) at positions on both sides of the inverted arch steel structure; a plurality of support columns (12) are respectively aligned and vertically arranged on the two bottom support beams (11); and a plurality of top cross beams (13) are respectively connected between the top ends of the two support columns (12) aligned with each other on the two bottom support beams (11).

5. The lifting and positioning device for the steel bar skeleton of an open hole lining invert according to claim 4 is characterized in that: A top longitudinal beam (14) perpendicular to the top cross beam (13) is arranged above the top cross beam (13), and the top longitudinal beam (14) is connected to all the top cross beams (13).

6. The lifting and positioning device for the steel bar skeleton of an open hole lining invert according to claim 4 is characterized in that: A diagonal brace (15) is provided at the connection between the top crossbeam (13) and the top ends of the two supporting columns (12).

7. The lifting and positioning device for the steel bar skeleton of an open hole lining invert according to claim 4 is characterized in that: The bottoms of the two bottom support beams (11) are respectively provided with moving wheel groups (5); the top surface of the inverted arch foundation (3) is provided with steel rails (6) extending along the axial direction of the inverted arch at positions on both sides of the inverted arch steel reinforcement structure; the two bottom support beams (11) are respectively connected to the two steel rails (6) via the moving wheel groups (5) at the bottoms thereof.

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