TBM pilot-tunnel-free starting operation platform

Abstract

The utility model discloses a tunnel boring machine (TBM) pilot-tunnel-free starting operation platform which comprises a concrete foundation and a pre-embedded assembly, and the pre-embedded assembly comprises two pieces of connecting channel steel, a plurality of connecting steel bars, a plurality of anchoring plates and a plurality of pre-embedded steel bars. The waist plates of the two pieces of connecting channel steel are parallel, and notches face each other; main bodies of the connecting steel bars are arranged in the length direction perpendicular to the connecting channel steel, and the two ends are fixedly connected with waist plates of the connecting channel steel correspondingly; the plate surfaces of the anchoring plates are fixed on the outer side surfaces of the wing plates of the connecting channel steel in an attached manner; a plurality of embedded steel bars are arranged on the plate surface, close to the connecting channel steel, of each anchoring plate; the pre-embedded assembly is partially embedded in the concrete foundation, so that the plate face, away from the connecting channel steel, of each anchoring plate is 1-2 mm higher than the top plane of the concrete foundation. The operation platform is formed at a time through pouring, the construction workload is small, the bearing capacity is high and reliable through the pre-buried anchoring mode, and normal tunneling of the TBM starting pilot tunnel can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tunneling, in particular to a TBM pilot-less starting operation platform. Background Art

[0002] TBM (Tunnel Boring Machine) initial excavation technology without a pilot tunnel (or launch pit) is an advanced tunnel construction method. It uses the TBM directly to excavate the tunnel without pre-excavating a pilot tunnel. This technology is efficient, fast, safe, and environmentally friendly, making it particularly suitable for tunnel projects in hard rock geology. When using a TBM for initial excavation without a pilot tunnel, a TBM assembly and launch platform must be set up outside the tunnel. This area supports the TBM mainframe, the No. 1 trolley, the equipment bridge, and the launch load, providing sufficient thrust during the TBM launch process to meet the requirements of excavation without the use of support shoes.

[0003] Most existing TBM assembly launch platforms fix the launch reaction frame by drilling holes and inserting rebar or drilling and coring steel. This fixation method requires operations such as drilling, which is labor-intensive and prone to underestimation of the reaction force. This can cause components to be damaged due to excessive force, thus affecting the initial excavation and construction. Utility Model Content

[0004] The problem to be solved by the utility model is to overcome the defects of the prior art and provide a TBM pilot-less starting operation platform with small construction and manufacturing workload, strong bearing capacity, and safe and stable operation of the TBM equipment.

[0005] In order to solve the above technical problems, the utility model provides a TBM pilot-less starting working platform, including a concrete foundation and an embedded component, the embedded component including two connecting channel steels, a plurality of connecting steel bars, a plurality of anchor plates and a plurality of embedded steel bars; the waist plates of the two connecting channel steels are parallel and the notches are arranged opposite each other; the main body of the connecting steel bar is arranged along the length direction perpendicular to the connecting channel steel, and the two ends are respectively fixedly connected to the waist plate of one connecting channel steel; the anchor plate surface is fixed on the outer surface of the wing plate of the connecting channel steel in a fitting manner, and each anchor plate is provided with a plurality of embedded steel bars on the plate surface close to the connecting channel steel; the embedded component is partially buried in the concrete foundation, so that the plate surface of each anchor plate away from the connecting channel steel is 1-2 mm higher than the top plane of the concrete foundation, and the plate surface higher than the plate surface is used for fixed connection with the TBM starting stepping frame.

[0006] In the above-mentioned TBM pilot tunnel-free starting operating platform, the operating platform is constructed in front of the designed tunnel heading and along the axis direction of the starting tunnel. It is formed by pouring in one time, avoiding the multiple drilling and installation operations of conventional traditional hole-making and reinforcing bars or drilling and coring steel. The workload is small, and the pre-buried anchoring method has a strong bearing capacity. The various components will not be damaged due to excessive force. The bearing capacity is reliable, which can ensure the normal excavation of the TBM starting pilot tunnel.

[0007] Furthermore, a steel mesh is provided in the concrete foundation. The steel mesh is made of HRB400 steel bars with a diameter of 12 mm, which are laid in two layers in both directions, and the grid spacing is 200 mm×200 mm.

[0008] Furthermore, support legs are provided between the two layers of the steel mesh and at the bottom of the connecting channel steel.

[0009] Furthermore, a plurality of anchor plates are evenly spaced apart on the outer side of a wing plate of each connecting channel steel, and the anchor plates on the two connecting channel steels are arranged opposite each other in pairs along a length direction perpendicular to the connecting channel steels.

[0010] Furthermore, the connecting channel steel adopts 14#-18# Q345 channel steel.

[0011] Furthermore, the connecting steel bars are evenly spaced along the length direction of the connecting channel steel.

[0012] Furthermore, the connecting steel bars are HRB400 steel bars with a diameter of 22 mm, and both ends of the connecting steel bars are bent and then welded to the connecting channel steel.

[0013] Furthermore, the anchor plate is made of Q234 square steel plate with a thickness of 20-30 mm and a side length of 300-400 mm.

[0014] Furthermore, four embedded steel bars are provided on each of the anchor plates. The embedded steel bars are HRB400 steel bars with a diameter of 28 mm and are bent into a J shape.

[0015] In summary, the use of the above-mentioned TBM pilotless starting operation platform reduces the construction and manufacturing workload, has a strong load-bearing capacity, and ensures safe and stable operation of the TBM equipment. The overall work area is very neat, avoiding some unforeseen safety risks that may arise from high working stress when the working surface structure is complex, thereby ensuring construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the attached figure:

[0017] Figure 1 This is a schematic diagram of the top view of the embedded component of the utility model.

[0018] Figure 2 A vertical cross-sectional schematic diagram of a TBM pilotless starting operating platform according to the present invention.

[0019] Figure 3 Schematic diagram of the anchor plate installation structure of the utility model.

[0020] In the figure, 1, concrete foundation; 21, connecting channel steel; 22, connecting steel bars; 23, anchor plate; 24, embedded steel bars. DETAILED DESCRIPTION

[0021] The following is a further description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0022] Example 1

[0023] Figure 1-3 The utility model shows a TBM non-pilot tunnel starting operation platform. Figure 1-3 As shown, the TBM pilotless starting working platform includes a concrete foundation 1 and embedded components, which include two connecting channel steels 21, a number of connecting steel bars 22, a number of anchor plates 23 and a number of embedded steel bars 24; the waist plates of the two connecting channel steels 21 are parallel and the notches are arranged opposite each other; the main body of the connecting steel bar 22 is arranged along the length direction of the vertical connecting channel steel 21, and the two ends are fixedly connected to the waist plate of a connecting channel steel 21 respectively; the anchor plate 23 is fixed on the outer surface of the wing plate of the connecting channel steel 21 in a fitting manner, and each anchor plate 23 is provided with a number of embedded steel bars 24 on the plate surface close to the connecting channel steel 21. The embedded components are partially embedded in the concrete foundation 1, so that the plate surface of each anchor plate 23 away from the connecting channel steel 21 is 1-2 mm higher than the top plane of the concrete foundation 1, and the plate surface is higher than the plate surface for fixed connection with the TBM starting walking frame.

[0024] Optionally, a steel mesh is provided in the concrete foundation 1 to enhance the strength and stability of the concrete structure. Specifically, the steel mesh can be made of HRB400 steel bars with a diameter of 12 mm, laid in two layers in both directions, with a grid spacing of 200 mm × 200 mm.

[0025] During the pouring of the concrete foundation 1, support feet are installed between the two layers of steel mesh and at the bottom of the connecting channel steel 21. The support feet ensure that the steel mesh and embedded components maintain the correct position and shape during the concrete pouring process, effectively preventing deformation or displacement under the pressure of concrete, thereby ensuring the overall quality and stability of the work platform.

[0026] like Figure 1As shown, a number of anchor plates 23 are evenly spaced on the outer side of a wing plate of each connecting channel steel 21. The anchor plates 23 on the two connecting channel steels 21 are arranged opposite each other in a pair along the length direction of the vertical connecting channel steel 21, so that the anchor plates 23 are evenly arranged, and the force is evenly applied when the TBM starting walking frame is fixed and installed, and the strength is higher.

[0027] Optionally, the connecting channel steel 21 may be 14#-18# Q345 channel steel. When using Q345 channel steel, the lumbar plate should be arranged vertically during construction, and the channel steel may be 14#-18#. Furthermore, if the connecting channel steel 21 is long, it may be constructed from multiple segments, each 3-4m long.

[0028] like Figure 1 As shown, the connecting steel bars 22 are evenly spaced along the length direction of the connecting channel steels 21. The two connecting channel steels 21 are fixedly connected into a whole by the connecting steel bars 22. The connecting steel bars are evenly arranged and the structure is stable.

[0029] Optionally, the connecting steel bar 22 is made of HRB400 steel with a diameter of 22 mm. The ends of the connecting steel bar 22 are bent and welded to the connecting channel steel 21. The ends of the connecting steel bar 22 are welded to the connecting channel steel 21 on both sides. The ends of the connecting steel bar 22 are bent and welded, with a weld length of 90-110 mm, preferably 100 mm, to ensure sufficient connection strength. Furthermore, the length of the connecting steel bar 22 is designed based on the actual dimensions of the initial reaction frame to be installed.

[0030] Optionally, the anchor plates 23 can be made of Q234 square steel plates with a thickness of 20-30 mm and a side length of 300-400 mm. The anchor plates 23 are fixed to the same side surface of the two connecting channel steels 21, exposed on the top surface of the concrete foundation 1, and are welded and fixed to the TBM starting walking frame.

[0031] like Figure 3 As shown, four embedded steel bars 24 are provided on each anchor plate 23. The embedded steel bars 24 are HRB400 steel bars with a diameter of 28 mm, bent into a J shape, and the top of the embedded steel bars 24 are connected to the anchor plate 23 by welding.

[0032] During construction, the required site is designed directly opposite the tunnel entrance and cleared. Excavation is then carried out to the construction elevation. Reinforcement mesh is then tied, embedded components are placed, and finally, concrete is poured. Care should be taken to ensure a dense pour. During pouring, the vibrator should avoid direct contact with the embedded components to ensure accurate positioning of the anchor plates and a dense concrete pour. The embedded components are prefabricated and welded together to form a single unit. This results in the construction of the work platform, or concrete foundation 1: 12m x 9m in size and 40cm thick. The finished concrete surface is slightly lower than the top surface of anchor plate 23 by 1-2mm. During initial operation, anchor plate 23 is connected to the initial reaction frame by welding, ensuring a full weld.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit its scope of protection. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the utility model, but these changes, modifications or equivalent substitutions are all within the scope of protection of the pending claims of the utility model.

Claims

1. A TBM non-pilot tunnel launching operation platform, characterized in that: The invention comprises a concrete foundation (1) and an embedded component, wherein the embedded component comprises two connecting channel steels (21), a plurality of connecting steel bars (22), a plurality of anchor plates (23) and a plurality of embedded steel bars (24); the waist plates of the two connecting channel steels (21) are parallel and the notches are arranged opposite each other; the main body of the connecting steel bar (22) is arranged along a longitudinal direction perpendicular to the connecting channel steel (21), and the two ends are respectively fixedly connected to the waist plate of one connecting channel steel (21); the plate surface of the anchor plate (23) is fixed on the outer surface of the wing plate of the connecting channel steel (21) in a fitting manner, and each anchor plate (23) is provided with a plurality of embedded steel bars (24) on the plate surface close to the connecting channel steel (21); The embedded components are partially embedded in the concrete foundation (1), so that the plate surface of each anchor plate (23) away from the connecting channel steel (21) is 1-2 mm higher than the top plane of the concrete foundation (1), and the plate surface is higher than the plate surface for fixed connection with the TBM starting stepping frame.

2. A TBM pilotless starting operation platform according to claim 1, characterized in that: A steel mesh is provided in the concrete foundation (1), wherein the steel mesh is made of HRB400 steel bars with a diameter of 12 mm and laid in two directions in two layers, with a grid spacing of 200 mm×200 mm.

3. A TBM pilotless starting operation platform according to claim 2, characterized in that: Support legs are provided between the two layers of the steel mesh and at the bottom of the connecting channel steel (21).

4. A TBM pilotless starting operation platform according to claim 1, characterized in that: A plurality of anchor plates (23) are evenly spaced apart on the outer side of a wing plate of each connecting channel steel (21), and the anchor plates (23) on the two connecting channel steels (21) are arranged opposite each other in pairs along a length direction perpendicular to the connecting channel steel (21).

5. The TBM non-pilot tunnel launching platform according to claim 1, characterized in that: The connecting channel steel (21) is made of 14#-18# Q345 channel steel.

6. The TBM non-pilot tunnel launching platform according to claim 1, characterized in that: The connecting steel bars (22) are evenly spaced along the length direction of the connecting channel steel (21).

7. The TBM non-pilot tunnel launching platform according to claim 1, characterized in that: The connecting steel bars (22) are HRB400 steel bars with a diameter of 22 mm. Both ends of the connecting steel bars (22) are bent and then welded to the connecting channel steel (21).

8. The TBM pilotless starting operation platform according to claim 1, characterized in that: The anchoring plate (23) is made of Q234 square steel plate with a thickness of 20-30 mm and a side length of 300-400 mm.

9. The TBM non-pilot tunnel launching platform according to claim 1, characterized in that: Four embedded steel bars (24) are provided on each anchoring plate (23). The embedded steel bars (24) are HRB400 steel bars with a diameter of 28 mm and are bent into a J shape.

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