Construction device for TBM crossing fault fracture zone of hydraulic tunnel

Abstract

The application discloses a kind of hydraulic tunnel TBM crossing fault fracture zone construction devices, including girder, cutterhead is set in the advancing end of girder, the guide rail is set in the girder, guide rail slidingly connects support ring, two slide blocks are annularly slidably connected on support ring, slide block sets rotary drilling machine, the drilling of the rotary drilling machine of two slide blocks is cross angle;Rotary support bracket is also slidably connected in guide rail, vertical drilling machine is set in rotary support bracket, rotary support bracket is used to support installation steel arch section, and multiple steel arch sections are assembled to form support ring, and pad is set on the both sides of support ring, and the pad is set grouting anchor rod.The application has the advantages that the application forms intersection in tunnel by two grouting anchor rods, and the intersection position A can be controlled by the angle of rotary drilling machine, close to solid stratum, and the top pressure of support shoe is directly transmitted to solid stratum by grouting anchor rod, the influence on fault fracture zone is reduced, and construction safety is improved.

Description

Technical Field

[0001] This invention relates to the field of TBM (Tunnel Boring Machine) construction technology for crossing fault fracture zones, and more particularly to a TBM construction device for crossing fault fracture zones in hydraulic tunnels. Background Technology

[0002] Due to its advantages such as high tunneling efficiency, good construction quality, and minimal disturbance to the surrounding rock, TBMs have been widely used in industries such as water conservancy and hydropower projects in recent years. However, due to its special body structure and tunneling method, it has poor adaptability to adverse geological conditions such as fault fracture zones. Within fault fracture zones, TBM tunneling efficiency is low, and problems such as TBM cutterhead and shield jamming and equipment damage may occur due to deformation and collapse of the surrounding rock. The rock mass strength in fault fracture zones is low, which cannot provide sufficient support reaction force for the TBM support shoes, affecting the normal tunneling of the TBM.

[0003] Existing technology for reinforcing tunnel rock mass by drilling and inserting grouting anchors requires dense drilling, resulting in low construction efficiency. Each grouting anchor is a single structure bearing the load, and the support shoe still poses a high construction risk due to insufficient support from the fault fracture zone rock mass. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a TBM (Tower Tunnel Boring Machine) construction device for traversing fault fracture zones in hydraulic tunnels, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A TBM (Toyota Burglar) construction device for traversing fault fracture zones in hydraulic tunnels includes a main beam, a cutterhead at the forward end of the main beam, a guide rail on the main beam, a support ring slidably connected to the guide rail, two sliding blocks slidably connected to the support ring, a rotary drilling rig on the sliding blocks, and the drilling holes of the rotary drilling rig on the two sliding blocks are at an intersecting angle. The guide rail is also slidably connected to a rotating support bracket, which is equipped with a vertical drilling rig. The rotating support bracket is used to support and install steel arch sections. Multiple steel arch sections are assembled to form a support ring. Pads are set on both sides of the support ring, and grouting anchors are set on the pads.

[0006] Preferably, the pad is provided with an arc-shaped sliding cavity, and two arc-shaped sliders are symmetrically slidably connected in the arc-shaped sliding cavity. The arc-shaped sliders protrude from the pad, and each arc-shaped slider is provided with a through groove. A guide tube is rotatably connected in the through groove. An avoidance groove is provided on the inner wall of the arc-shaped sliding cavity, and the grouting anchor rod passes through the guide tube and is fixedly connected. A displacement sensor is installed between the arc-shaped slider and the inner wall of the arc-shaped sliding cavity.

[0007] Preferably, the grouting anchor bolt end has a semi-section structure and is provided with a dovetail slot.

[0008] Preferably, a through hole is provided in the middle of the pad, a radial push rod is provided in the through hole, a round rod is provided at the end of the radial push rod, dovetail inserts are fixedly connected to both sides of the round rod, the dovetail inserts are correspondingly provided with the dovetail slots, and the round rod passes through the intersection of the two grouting anchor rods, and the dovetail inserts are provided with a clearance fit with the dovetail slots. A conical block is fixedly connected to one end of the radial push rod, and an inclined surface is provided on one side of the arc-shaped slider.

[0009] Preferably, the radial push rod is a hollow rod.

[0010] Preferably, the height of the radial push rod protruding from the pad is greater than the height of the grouting anchor rod protruding from the pad, and the diameter of the round rod is smaller than the diameter of the radial push rod.

[0011] This invention provides a TBM (Toyota Burmester) construction device for traversing fault fracture zones in hydraulic tunnels. It has the following beneficial effects: (1) Two grouting anchors are intersected in the tunnel, and the intersection position A can be controlled by the angle of the rotary drilling rig. The top pressure of the support shoe is directly transmitted to the solid stratum through the grouting anchors, reducing the impact on the fault fracture zone and improving construction safety.

[0012] (2) The support shoe first acts on the radial top rod, so that the grouting solid has a tendency to press against the solid stratum. After the radial top rod is inserted, the conical block squeezes the inclined surface, so that the hinge position of the grouting anchor rod, i.e. the two arc-shaped sliders, tends to move away from each other, providing D-direction support to the fault fracture zone, thereby improving the support force. The displacement sensors at both ends form displacement monitoring, avoiding the collapse of the support shoe support position and improving construction safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the basic structure of the present invention; Figure 2 This is a schematic diagram of the fault fracture zone reinforcement structure of the present invention; Figure 3 This is a schematic diagram of the connection structure of the pad plate of the support ring of the present invention; Figure 4 This is a cross-sectional structural schematic diagram of the pad of the present invention; Figure 5 This is a schematic diagram of the supporting structure principle of the present invention. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0015] like Figures 1 to 5As shown, the present invention provides a technical solution: a TBM construction device for crossing fault fracture zones in hydraulic tunnels, including a main beam 1, a cutterhead 11 at the forward end of the main beam 1, a guide rail 12 on the main beam 1, a support ring 13 slidably connected to the guide rail 12, two sliding blocks 14 circumferentially connected to the support ring 13, a rotary drilling rig 15 on the sliding blocks 14, the drilling holes of the rotary drilling rig 15 on the two sliding blocks 14 are at an intersecting angle, and grouting anchor rods 5 are inserted into the drilling holes formed by the rotary drilling rig 15; The guide rail 12 is also slidably connected to the rotating support bracket 2. The rotating support bracket 2 is an existing technology. Its function is to rotate around the axis and push the required support structure to the inner wall of the tunnel through the hydraulic lifting bracket. The support ring 13 and the rotating support bracket 2 slide on the guide rail 12 through the existing drive structure to drill holes or install support structures at the corresponding positions of the inner wall of the tunnel. The rotating support bracket 2 is equipped with a vertical drilling machine. The rotating support bracket 2 is used to support the installation of steel arch sections 3. Multiple steel arch sections 3 are assembled to form a support ring. Pads 4 are set on both sides of the support ring. Grouting anchors 5 are set on the pads 4.

[0016] This invention uses two grouting anchor bolts 5 to form an intersection within the tunnel, and the intersection position A can be controlled by the angle of the rotary drilling rig 15. Figure 2 (The dotted line represents a drilling path at another angle). Close to the solid stratum, the top pressure of the support shoe 10 is directly transmitted to the solid stratum through the grouting anchor 5, reducing the impact on the fault fracture zone and improving construction safety.

[0017] Example 2 like Figures 1 to 5 As shown, the pad 4 is provided with an arc-shaped sliding cavity 41, and two arc-shaped sliders 42 are symmetrically slidably connected inside the arc-shaped sliding cavity 41. The arc-shaped sliders 42 protrude from the pad 4, and the support shoe 10 directly presses against the arc-shaped sliders 42 and is provided with a slot 20. Each arc-shaped slider 42 is provided with a through groove 43, and a guide tube 44 is rotatably connected inside the through groove 43 by a pin. The inner wall of the arc-shaped sliding cavity 41 is provided with a clearance groove 46 to avoid the grouting anchor rod 5. The grouting anchor rod 5 passes through the guide tube 44 and is welded and fixedly connected to the guide tube 44. A displacement sensor 47 is installed between the arc-shaped slider 42 and the inner wall of the arc-shaped sliding cavity 41. The grouting anchor 5 is subjected to the component force in the D direction, which will have a destructive effect on the fault fracture zone, causing the two arc-shaped sliders 42 to tend to diverge. The displacement sensor 47 monitors the construction safety in this direction in a timely manner, prepares emergency plans in time for possible dangers, and ensures the safety of construction.

[0018] Example 3 like Figures 1 to 5As shown, the end of the grouting anchor 5 is semi-sectioned and equipped with a dovetail slot 51. A through hole 6 is provided in the middle of the pad 4, and a radial top rod 7 is provided in the through hole 6. A round rod 71 is provided at the end of the radial top rod 7. Dovetail inserts 72 are fixedly connected to both sides of the round rod 71. The dovetail inserts 72 are correspondingly set with the dovetail slot 51, and the round rod 71 passes through the intersection of the two grouting anchors 5, forming an integral plug-in assembly structure. This facilitates the support force of the support shoe 10 to act directly on the solid stratum. The dovetail inserts 72 and the dovetail slot 51 are fitted with a gap, so that the grouting anchor 5 can provide support to the fault fracture zone with the plug-in point as the reference. A conical block 711 is fixedly connected to one end of the radial top rod 7. An inclined surface 712 is provided on one side of the arc-shaped slider 42. After the radial top rod 7 is inserted, the conical block 711 squeezes the inclined surface 712, so that the two arc-shaped sliders 42 move away from each other, thereby increasing the support range through the grouting anchor 5.

[0019] The radial jacking rod 7 is a hollow rod. Grout is injected into the tunnel through the radial jacking rod 7. The height of the radial jacking rod 7 protruding from the pad plate 4 is greater than the height of the grouting anchor rod 5 protruding from the pad plate 4. The diameter of the round rod 71 is smaller than the diameter of the radial jacking rod 7, forming a pier. The force F is applied to the intersection of the two grouting anchor rods 5 to form the grouting reinforced body 100. Figure 2 and Figure 5 As shown, the grouting reinforcement 100 is close to the solid stratum, thereby preventing the support shoe 10 from sinking into the tunnel wall and causing tunnel collapse.

[0020] In embodiment 3, the support shoe 10 first acts on the radial push rod 7 ( Figure 5 The F-direction of the grouting anchor 5 causes the grouting solidified body 100 to tend to press against the solid stratum. At the same time, since the hinge point of the grouting anchor 5 is on the pad plate 4, after the radial top rod 7 is inserted, the conical block 711 squeezes the inclined surface 712, causing the hinge point of the grouting anchor 5, i.e. the two arc-shaped sliders 42, to tend to move away from each other, providing D-direction support to the fault fracture zone, thereby improving the support force. In addition, the displacement sensors at both ends form displacement monitoring to avoid the collapse of the support position of the support shoe 10, thus improving construction safety.

[0021] The pad 4 shown in this invention is only provided with one set of radial top rods 7 and two grouting anchors 5. Multiple sets can be provided along the tunnel direction according to the performance of the fault fracture zone, forming a multi-directional reinforcement and monitoring system with different degrees.

[0022] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A TBM (Toyota Burglar) construction device for traversing fault fracture zones in hydraulic tunnels, comprising a main beam (1), wherein a cutterhead (11) is provided at the advancing end of the main beam (1), characterized in that: The main beam (1) is provided with a guide rail (12), the guide rail (12) is slidably connected to a support ring (13), and two slide blocks (14) are slidably connected on the support ring (13). A rotary drill (15) is provided on the slide block (14), and the drilling of the rotary drill (15) on the two slide blocks (14) is at an intersecting angle. The guide rail (12) is also slidably connected to the rotating support bracket (2), the rotating support bracket (2) is equipped with a vertical drilling rig, the rotating support bracket (2) is used to support the installation of steel arch sections (3), multiple steel arch sections (3) are assembled to form a support ring, and pads (4) are set on both sides of the support ring, and grouting anchors (5) are set on the pads (4).

2. The TBM construction device for traversing fault fracture zones in hydraulic tunnels according to claim 1, characterized in that: The pad (4) is provided with an arc-shaped sliding cavity (41), and two arc-shaped sliders (42) are symmetrically slidably connected inside the arc-shaped sliding cavity (41). The arc-shaped sliders (42) protrude from the pad (4). Each arc-shaped slider (42) is provided with a through groove (43). A guide tube (44) is rotatably connected inside the through groove (43). An avoidance groove (46) is provided on the inner wall of the arc-shaped sliding cavity (41). The grouting anchor (5) passes through the guide tube (44) and is fixedly connected. A displacement sensor (47) is installed between the arc-shaped slider (42) and the inner wall of the arc-shaped sliding cavity (41).

3. The TBM construction device for traversing fault fracture zones in hydraulic tunnels according to claim 2, characterized in that: The grouting anchor (5) has a semi-section structure at the end and is provided with a dovetail slot (51).

4. The TBM construction device for traversing fault fracture zones in hydraulic tunnels according to claim 3, characterized in that: The pad (4) is provided with a through hole (6) in the middle, and a radial push rod (7) is provided in the through hole (6). A round rod (71) is provided at the end of the radial push rod (7). Dovetail inserts (72) are fixedly connected to both sides of the round rod (71). The dovetail inserts (72) are correspondingly provided with the dovetail slots (51), and the round rod (71) passes through the intersection of the two grouting anchors (5). The dovetail inserts (72) and the dovetail slots (51) are provided with a clearance fit. A conical block (711) is fixedly connected to one end of the radial push rod (7), and an inclined surface (712) is provided on one side of the arc-shaped slider (42).

5. The TBM construction device for traversing fault fracture zones in hydraulic tunnels according to claim 4, characterized in that: The radial push rod (7) is a hollow rod.

6. The TBM construction device for traversing fault fracture zones in hydraulic tunnels according to claim 4, characterized in that: The height of the radial top rod (7) protruding from the pad (4) is greater than the height of the grouting anchor rod (5) protruding from the pad (4), and the diameter of the round rod (71) is smaller than the diameter of the radial top rod (7).

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