Large TBM rear matching portal steel frame during tunneling station lining

Abstract

The utility model provides large -scale TBM is equipped with the door type steel frame of going through during the lining of the tunneling station, belongs to the technical field of tunnel construction support, include: a plurality of door frame, link rod piece, longitudinal plate spare and positioning seat. The utility model discloses, through the design positioning seat, the top fixed connection longitudinal plate spare of door frame, and positioning seat carries out the steady restriction to longitudinal plate spare, and such can realize the auxiliary stabilizing effect to door frame, make the passage structure more stable, satisfy the demand of TBM after the equipment of equipping with going through, guarantee and will not collide station lining, guarantee the safety of construction. TBM after the equipment of equipping with going through process does not need to dismantle station lining, can guarantee construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction support technology, specifically a portal steel frame that is used to support a large TBM during the lining of a mined railway station. Background Technology

[0002] The lining of a tunnel-cut railway station needs to be enclosed in a closed ring. The construction space is occupied by formwork trolleys or formwork scaffolding and rebar binding equipment. However, the TBM's supporting equipment (which can be up to 100 meters long and over 3 meters high) needs to force its way through the lining structure before it is completely closed, which leads to the risk of collision between the formwork trolleys or formwork scaffolding and the supporting equipment (such as material transport battery vehicles, gate exit systems, ventilation, water and electricity pipelines, etc.).

[0003] Lining construction needs to be carried out in stages (side walls, arch, middle plate, ventilation duct), while the TBM-supporting equipment needs to be continuously accessed. Traditional methods involve pausing lining construction or removing formwork trolleys to "make way," which severely slows down the progress. Each ring of lining construction requires the removal / reinstallation of local supports to accommodate the access of the supporting equipment, resulting in a delay of 4 to 6 hours per ring and extending the overall construction period by more than 20%.

[0004] The core contradiction in the TBM rear-mounted passage during lining lies in the conflict between "station lining" and "TBM rear-mounted passage". Existing technologies, due to the lack of a stable portal steel frame, result in a triple loss of control over safety, quality, and efficiency. Therefore, this utility model provides a portal steel frame for the rear-mounted passage of a large TBM during the lining of a mined station. Utility Model Content

[0005] To address the construction conflict between "station lining" and "TBM rear-mounted support passage", this utility model provides a portal steel frame for the passage of a large TBM rear-mounted support during the lining of a cut-and-cover station.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The large TBM is followed by a portal steel frame that passes through during the lining of the tunnel station, including:

[0008] A gantry is fixedly installed on the top of the tunnel guide platform. Multiple sets of gantry are arranged at intervals along the length of the tunnel. A longitudinal plate is fixedly installed on the top of the gantry.

[0009] A positioning seat is fixedly installed on the cross frame, and the longitudinal plate corresponds to the positioning hole at the bottom of the positioning seat;

[0010] Connecting rods connect adjacent sets of gantry frames;

[0011] The gantry includes:

[0012] Embedded parts distributed in the guide platforms on both sides of the track;

[0013] The column, the bottom end of which is fixedly connected to the embedded part;

[0014] A crossbeam is fixedly installed on the top of two sets of columns, and a diagonal brace is fixedly connected between the crossbeam and the columns.

[0015] As a further description of the above technical solution:

[0016] An oblique opening is provided inside the positioning port and on the left and right sides of the longitudinal plate. An elastic side block is provided inside the oblique opening. A sliding plate is fixedly connected to the side of the elastic side block and at the bottom of the positioning seat. The sliding plate is fixedly installed to the bottom of the positioning seat.

[0017] As a further description of the above technical solution:

[0018] The connecting rod includes multiple channel steel short sections. A rectangular opening is formed between two adjacent channel steel short sections and two adjacent portal frames. A cross-shaped tie rod system is provided between two adjacent channel steel short sections and at the diagonal of the rectangular opening.

[0019] As a further description of the above technical solution:

[0020] A top plate is fixedly connected to the top of the column, and the top plate is welded and fixed to the crossbeam.

[0021] As a further description of the above technical solution:

[0022] The two ends of the diagonal brace are respectively fixedly connected to a first plate and a second plate. The first plate is welded and fixed to the column, and the second plate is welded and fixed to the crossbeam.

[0023] As a further description of the above technical solution:

[0024] The embedded parts include:

[0025] The top plate has a U-shaped embedded rib fixedly connected to its bottom, which is opposite to the top plate. The bottom of the embedded rib has a barb.

[0026] The beneficial effects of this utility model are:

[0027] This invention utilizes a positioning seat to fix a longitudinal plate to the top of the gantry. The positioning seat provides stable restraint to the longitudinal plate, thus providing auxiliary stability to the gantry and making the passage structure more stable. This meets the requirements for the passage of TBM auxiliary equipment, ensuring no collision with the station lining and guaranteeing construction safety. The TBM auxiliary equipment does not need to dismantle the station lining during passage, ensuring construction efficiency. Attached Figure Description

[0028] To more clearly illustrate the portal steel frame that traverses the tunnel station lining after the large TBM, the following figures are shown;

[0029] Figure 1 This is a front view of the present invention;

[0030] Figure 2 This is a side view of the present invention;

[0031] Figure 3 for Figure 1 Enlarged view of a portion of point A in the middle;

[0032] Figure 4 This is a schematic diagram of the gantry of this utility model;

[0033] Figure 5 This is a schematic diagram of the bottom connection of the column of this utility model;

[0034] Figure 6 This is a schematic diagram showing the connection between the column and the beam of this utility model;

[0035] Figure 7 This is a schematic diagram showing the connection between the diagonal brace and the column and beam of this utility model.

[0036] Figure 8 This is a schematic diagram showing the connection between the column and the embedded part of this utility model;

[0037] Figure 9 This is a side view of the embedded part of this utility model.

[0038] The labels in the attached diagram;

[0039] 1. Gantry; 101. Column; 101a. Top plate; 102. Horizontal beam; 103. Diagonal brace; 103a. First plate; 103b. Second plate; 104. Embedded part; 104a. Top plate; 104b. Embedded reinforcement; 104b1. Hook part; 2. Horizontal frame; 3. Longitudinal plate; 4. Connecting rod; 401. Channel steel short section; 402. Tie rod system; 5. Positioning seat; 5a. Positioning opening; 5a1. Slanted opening; 6. Elastic side block; 6a. Slide plate part. Detailed Implementation

[0040] Please refer to the attached document. Figures 1-9 This document illustrates a portal steel frame provided by an embodiment of the present application for a large TBM (Tunnel Boring Machine) support system that allows it to pass through a tunnel lining site during the construction of a tunnel lining. The system is installed at the tunnel lining construction site and provides stable and reliable protective support for the passage of TBM support equipment. Specifically, it includes: several portal frames 1, cross frames 2, connecting rods 4, longitudinal plates 3, and positioning seats 5.

[0041] The gantry 1 is fixedly installed on the top of the tunnel guide platform. The gantry 1 spans the tunnel, and two columns are fixed on the guide platforms on both sides of the tunnel. Multiple sets of gantry 1 are arranged at intervals along the length of the tunnel. Connecting rods 4 connect adjacent sets of gantry 1 to form a stable passage structure. A longitudinal plate 3 is fixedly installed on the top of the gantry 1 and a positioning seat 5 is fixedly installed on the cross frame 2. The longitudinal plate 3 corresponds to the positioning port 5a at the bottom of the positioning seat 5. The longitudinal plate 3 is stuck in the positioning port 5a, which can limit the stability of the gantry 1 structure and make the passage structure more stable.

[0042] This invention utilizes a positioning seat 5 to fix a longitudinal plate 3 to the top of the gantry 1. The positioning seat 5 provides stable restraint to the longitudinal plate 3, thus achieving auxiliary stabilization of the gantry, making the passage structure more stable, meeting the needs of TBM downstream equipment passage, ensuring no collision with the station lining, and guaranteeing construction safety. The TBM downstream equipment does not need to dismantle the station lining during passage, ensuring construction efficiency.

[0043] The specific gantry 1 includes: embedded parts 104, columns 101, beams 102, and diagonal braces 103. Columns 101, beams 102, and diagonal braces 103 are all made of I-beams. For example, column 101 is made of Q235 H-beams, 250mm×255mm×14mm×14mm, with a height of 4840mm; beam 102 is made of Q235 H-beams, 400mm×200mm×8mm×13mm, with a length of 4450mm; and diagonal braces 103 are made of Q235 H-beams, beveled, 200mm×100mm×5.5mm×8mm, with a length of 2247mm.

[0044] The embedded parts 104 are distributed on the guide platforms on both sides of the track. They are cast and fixed to the guide platforms on both sides of the track by pre-embedding. The bottom end of the column 101 is fixedly connected to the embedded parts 104. The crossbeam 102 is fixedly installed on the top of the two sets of columns 101. The crossbeam 102 and the column 101 are fixedly connected by the diagonal brace 103.

[0045] Embedded parts 104, columns 101, beams 102, and diagonal braces 103 form a stable portal structure.

[0046] In one embodiment, an oblique opening 5a1 is provided inside the positioning opening 5a and on the left and right sides of the longitudinal plate 3. An elastic side block 6 is provided inside the oblique opening 5a1. The elastic side block 6 provides lateral support for the longitudinal plate 3. A sliding plate part 6a is fixedly connected to the side of the elastic side block 6 and at the bottom of the positioning seat 5. The sliding plate part 6a is fixedly installed to the bottom of the positioning seat 5. The sliding plate part 6a and the bottom of the positioning seat 5 are fixedly installed with screws.

[0047] When the gantry 1 is impacted, the gantry 1 causes the longitudinal plate 3 to swing, and the longitudinal plate 3 directly contacts the elastic side block 6. The elastic side block 6 plays the role of absorbing energy and buffering, and plays a role in protecting the entire structure.

[0048] In one embodiment, the connecting rod 4 includes a plurality of channel steel short sections 401, and a rectangular opening is formed between two adjacent channel steel short sections 401 and two adjacent portal frames 1. A cross-distributed tie rod system 402 is provided between two adjacent channel steel short sections 401 and at the diagonal of the rectangular opening.

[0049] The short channel steel section 401 is made of 10# channel steel with a length of 650mm; the tie rod system 402 is also made of 10# channel steel with a rod length of 1727mm, which firmly connects each individual portal steel frame.

[0050] In one embodiment, a top plate 101a is fixedly connected to the top of the column 101, and the top plate 101a is welded to the crossbeam 102 to ensure that the column 101 and the crossbeam 102 have sufficient welding contact surface.

[0051] In one embodiment, the two ends of the diagonal brace 103 are respectively fixedly connected to a first plate 103a and a second plate 103b. The first plate 103a is welded and fixed to the column 101, and the second plate 103b is welded and fixed to the crossbeam 102.

[0052] Ensure that both ends of the diagonal brace 103 have sufficient welding contact surfaces so that it can be stably welded to the column 101 and the beam 102.

[0053] In one embodiment, the embedded part 104 includes: a top plate 104a, and an embedded rib 104b fixedly connected to the bottom of the top plate 104a and disposed opposite to the top plate 104a. The embedded rib 104b is U-shaped and has a barb portion 104b1 at the bottom.

[0054] For example, the embedded part uses a 20mm thick 350mm×350mm steel plate, with a Ф80mm round hole drilled in the center of the steel plate, and two bar bars bent into a hook shape are welded to the side embedded in the concrete. Each bar bar has a 250mm long connecting section, a 200mm long straight section of the hook, a 50mm long tail end of the hook, and a bending angle of 180°.

[0055] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0056] It should be understood that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. This invention is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A portal steel frame that runs alongside a large TBM during the lining of a mined-and-cover railway station, characterized in that: include: A gantry (1) is fixedly installed on the top of the tunnel guide platform. Multiple sets of gantry (1) are arranged at intervals along the tunnel length direction. A longitudinal plate (3) is fixedly installed on the top of the gantry (1). The cross frame (2) and the positioning seat (5) fixedly installed on the cross frame (2), wherein the longitudinal plate (3) corresponds to the positioning port (5a) at the bottom of the positioning seat (5); A connecting rod (4) connects two adjacent sets of gantry frames (1); The gantry (1) includes: Embedded parts (104) are distributed in the guide platforms on both sides of the track; A column (101) is fixedly connected at its bottom end to an embedded part (104); A crossbeam (102) is fixedly installed on the top of two sets of columns (101), and a diagonal brace (103) is fixedly connected between the crossbeam (102) and the columns (101).

2. The portal steel frame that runs alongside a large TBM during the lining of a tunnel-cut station, as described in claim 1, is characterized in that: An oblique opening (5a1) is provided inside the positioning port (5a) and on the left and right sides of the longitudinal plate (3). An elastic side block (6) is provided inside the oblique opening (5a1). A sliding plate part (6a) is fixedly connected to the side of the elastic side block (6) and at the bottom of the positioning seat (5). The sliding plate part (6a) is fixedly installed to the bottom of the positioning seat (5).

3. The portal steel frame that runs alongside a large TBM during the lining of a tunnel-cut station, as described in claim 1, is characterized in that: The connecting rod (4) includes multiple channel steel short sections (401), and a rectangular opening is formed between two adjacent channel steel short sections (401) and two adjacent portal frames (1). A cross-shaped tie rod system (402) is provided between two adjacent channel steel short sections (401) and at the diagonal of the rectangular opening.

4. The portal steel frame that runs alongside a large TBM during the lining of a tunnel-cut station, as described in claim 1, is characterized in that: The top of the column (101) is fixedly connected to a top plate (101a), which is welded and fixed to the crossbeam (102).

5. The portal steel frame that runs alongside a large TBM during the lining of a tunnel-cut station, as described in claim 1, is characterized in that: The two ends of the diagonal brace (103) are respectively fixedly connected to a first plate (103a) and a second plate (103b). The first plate (103a) is welded to the column (101) and the second plate (103b) is welded to the crossbeam (102).

6. The portal steel frame that runs alongside a large TBM during the lining of a mined-and-cover station, as described in claim 1, is characterized in that... The embedded part (104) includes: A top plate (104a) is fixedly connected to the bottom of the top plate (104a) with a pre-embedded rib (104b) arranged opposite to the top plate (104a). The pre-embedded rib (104b) is U-shaped and has a barb (104b1) at the bottom.

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