TBM shield body structure suitable for drainage gallery construction environment
By designing the TBM shield structure that is suitable for the construction environment of the drainage corridor, the problem of damage caused by water leakage caused by the top of the tunnel is solved, and higher construction safety and efficiency are achieved, and economic losses are reduced.
Patent Information
- Application Number
- CN202421404133.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-06-19
AI Technical Summary
When using TBM for drainage corridor construction, water seepage often occurs on the top of the tunnel, resulting in damage to the machine and economic losses.
A TBM shield structure suitable for the construction environment of the drainage corridor, including front shields, feed components, connecting shields, excrement pipes, telescopic components and support shields. This structure collects liquids leaked from the top of the tunnel through the drainage groove and the drainage pipe, and provides advanced force and anti -torque through the telescopic component and support shield to reduce the risk of machine damage.
Effectively reduce machine damage caused by water seepage at the top of the tunnel, improve the safety and efficiency of construction, and reduce economic losses.
Smart Images
Figure CN222414850U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tunnel boring machines, and in particular relates to a TBM shield structure suitable for a drainage gallery construction environment. Background Art
[0002] The pressure pipelines of hydropower stations are generally designed with steel plate linings. It is well known that steel plate linings have many advantages such as high strength, good internal water conditions, and good impermeability, but they also have a fatal weakness of poor resistance to external water pressure. In view of this weakness, drainage corridors are set up around high-pressure pipelines, the purpose of which is to lower the groundwater level near the high-pressure pipelines. The excavation section of the drainage corridor is generally very small, and it is very difficult to construct using the drilling and blasting method. Safety and construction progress are difficult to guarantee. Therefore, some hydropower stations have introduced the more advanced TBM method for the construction of drainage corridors, which has greatly solved the two major problems of safety and progress.
[0003] TBM (full-section tunnel boring machine) construction has many advantages such as less pollution, good excavation effect, high excavation efficiency, and relatively safe excavation. At present, more and more tunnels are constructed using TBM. However, when using TBM for construction, water seepage often occurs at the top of the tunnel, which can damage the machine and cause serious economic losses. Utility Model Content
[0004] The utility model provides a TBM shield structure suitable for a drainage gallery construction environment, and is used to solve the technical problem in the prior art that the TBM shield structure is easily damaged.
[0005] The utility model is realized through the following technical solutions:
[0006] A TBM shield structure suitable for drainage gallery construction environment, comprising:
[0007] A front shield has a discharge channel and is provided with a main drive inside to drive the front shield to rotate. The front shield is used for breaking rocks and loading crushed rock slag;
[0008] A discharge assembly is connected to the discharge channel, and the discharge assembly is used to transport the crushed rock slag;
[0009] A connecting shield, the front shield is rotatably mounted on the connecting shield, and a drainage trough is provided on the connecting shield, and the drainage trough is used to receive liquid seeping from the top of the tunnel;
[0010] A drain pipe, connected to the drain groove, and used to drain the accumulated liquid in the drain groove;
[0011] A telescopic component, one end of which passes through the connecting shield and is connected to the front shield, and the telescopic component is used to drive the front shield and the connecting shield to move;
[0012] A support shield is connected to the other end of the telescopic assembly, and in a working state, the support shield abuts against the tunnel wall.
[0013] Furthermore, the front shield includes a cutter disc, and the cutter disc is connected to the discharge channel.
[0014] Furthermore, the discharge assembly comprises:
[0015] An arc-shaped piece, on which a blanking opening is provided, and the arc-shaped piece is rotatably connected to the front shield;
[0016] A slag collecting bucket is arranged below the material dropping opening, and is used to receive the rock slag dropped from the material dropping opening;
[0017] One end of the belt is connected to the end of the slag collecting bucket away from the arc-shaped piece.
[0018] Furthermore, there are multiple discharge channels, and the multiple discharge channels are evenly distributed on the front shield along the circumferential direction of the front shield.
[0019] Furthermore, the connecting shield has a peripheral wall surface, the axis extension direction of the peripheral wall surface is the extension direction of the axis of rotation of the front shield, and the drainage groove is located on the peripheral wall surface.
[0020] Furthermore, it also includes a filter screen, which is installed at the notch of the drainage trough.
[0021] Furthermore, the cross-sectional area of the connecting shield gradually decreases in the direction from the supporting shield to the front shield.
[0022] Furthermore, a drainage port is provided at the bottom of the drainage tank, and one end of the drainage pipe is installed at the drainage port.
[0023] Furthermore, an angle α is formed between the bottom wall of the drainage groove and the axis of the rotating shaft of the front shield.
[0024] Furthermore, the angle α has a value range of 0°<α≤70°.
[0025] Furthermore, the telescopic assembly includes a plurality of propulsion cylinders, one end of each of the propulsion cylinders passes through the connecting shield and is connected to one end of the front shield, and the other end of each of the propulsion cylinders is mounted on the supporting shield.
[0026] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0027] The utility model provides a TBM shield structure suitable for drainage gallery construction environment, comprising a front shield, a discharge assembly, a connecting shield, a drainage pipe, a telescopic assembly and a supporting shield. The front shield has a discharge channel, a main drive is arranged inside to drive the front shield to rotate, the front shield is used for breaking rocks and loading crushed rock slag, the discharge assembly is connected with the discharge channel, the discharge assembly is used for conveying crushed rock slag, the front shield is rotatably mounted on the connecting shield, a drainage trough is arranged on the connecting shield, the drainage trough is used for receiving liquid seeping from the top of the tunnel, the drainage pipe is connected with the drainage trough, the drainage pipe is used for discharging the accumulated liquid in the drainage trough, one end of the telescopic assembly passes through the connecting shield and is connected with the front shield, the telescopic assembly is used for driving the front shield and the connecting shield to move, the supporting shield is connected with the other end of the telescopic assembly, and the supporting shield abuts against the tunnel wall in the working state.
[0028] Through the above structure, when using the TBM shield structure suitable for the drainage gallery construction environment provided by the utility model, the support shield is firstly made to abut against the tunnel wall, and then the end of the telescopic assembly connected to the front shield is driven to begin to extend, so that the front shield is pressed toward the working surface, and at the same time, the front shield is driven by the main drive to start rotating, so that the rock layer is broken, and the crushed rock debris enters the discharge channel. The discharge channel is connected to the discharge assembly, so the crushed rock debris will fall onto the discharge assembly after entering the discharge channel, and finally the discharge assembly transports the crushed rock debris to the outside of the tunnel. Through the setting of the support shield, it withstands the reverse thrust of the excavation, and through the setting of the telescopic assembly, it can not only provide the propulsion force for the advance, but also The counter torque of excavation is transmitted to the support shield. When one excavation is completed, the support shield is driven to separate from the tunnel wall, and the telescopic component is abutted against the newly assembled pipe segment. Then, the end of the telescopic component connected to the front shield is driven to open and contract, and the end of the telescopic component abutting the pipe segment is driven to start to extend, so that the connecting shield and the support shield move in the direction of excavation. During the movement of the connecting shield, the seeping liquid on the top wall of the tunnel is collected in the drainage trough, and then the accumulated liquid is discharged into the drainage trough through the drainage pipe, reducing the probability of liquid damaging the machine. Therefore, through the setting of the connecting shield, the TBM shield structure suitable for the drainage corridor construction environment provided by the utility model is less likely to be damaged, thereby reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:
[0030] Figure 1 A schematic diagram of the structure of a TBM shield structure suitable for a drainage gallery construction environment provided by an embodiment of the utility model;
[0031] Figure 2 A schematic diagram of the installation structure of the front shield and the arc-shaped sheet is provided for an embodiment of the utility model.
[0032] Marks and corresponding parts names in the attached drawings:
[0033] 1-front shield, 11-discharge channel, 2-discharge assembly, 21-arc sheet, 211-dropping port, 22-slag collecting bucket, 23-belt, 3-connecting shield, 31-drainage trough, 4-drainage pipe, 5-telescopic assembly, 6-support shield, 7-knife disc, 8-filter. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.
[0035] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component.
[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0038] Example:
[0039] This embodiment provides a TBM shield structure suitable for the construction environment of drainage corridors, which is used to solve the technical problem that the TBM shield structure in the prior art is easily damaged. The TBM shield structure suitable for the construction environment of drainage corridors includes a front shield 1, a discharge assembly 2, a connecting shield 3, a drainage pipe 4, a telescopic assembly 5 and a supporting shield 6, wherein:
[0040] The front shield 1 has a discharge channel 11, and a main drive is arranged inside to drive the front shield 1 to rotate. The front shield 1 is used for breaking rocks and loading crushed rock slag. The main drive is connected to the front shield 1 by bolts. The specific structure and working principle of the main drive are existing technologies and will not be repeated here.
[0041] The discharge assembly 2 is connected to the discharge channel 11 and is used to transport crushed rock. When the front shield 1 crushes the rock layer, the crushed rock is collected in the front shield 1, and then the crushed rock falls onto the discharge assembly 2 through the discharge channel 11, and is transported to the outside of the tunnel through the discharge assembly 2.
[0042] The front shield 1 is rotatably mounted on the connecting shield 3, and a drainage groove 31 is provided on the connecting shield 3. The drainage groove 31 is used to receive the liquid seeping from the top of the tunnel. In this way, through the setting of the connecting shield 3, the liquid seeping from the top of the tunnel is collected in the drainage groove 31, reducing the probability of the machine being damaged by the liquid.
[0043] The drain pipe 4 is connected to the drain trough 31 and is used to discharge the accumulated liquid in the drain trough 31. Through the setting of the drain pipe 4, the crushed rock and the liquid are transported separately to prevent the crushed rock from sticking to the discharge component 2 and causing the discharge component 2 to fail.
[0044] One end of the telescopic assembly 5 passes through the connecting shield 3 and is connected to the front shield 1 , and the telescopic assembly 5 is used to drive the front shield 1 and the connecting shield 3 to move.
[0045] The support shield 6 is connected to the other end of the telescopic assembly 5. In the working state, the support shield 6 abuts against the tunnel wall. Through the setting of the support shield 6, the reverse thrust of excavation is borne, so that the TBM shield structure can move forward smoothly.
[0046] Through the above structure, when using the TBM shield structure suitable for the drainage gallery construction environment provided by the utility model, the support shield 6 is firstly made to abut against the tunnel wall, and then the end of the telescopic assembly 5 connected to the front shield 1 is driven to begin to extend, so that the front shield 1 is pressed toward the working surface, and at the same time, the front shield 1 is driven by the main drive to start rotating, so that the rock layer is broken, and the crushed rock slag enters the discharge channel 11, and the discharge channel 11 is connected to the discharge assembly 2. Therefore, after the crushed rock slag enters the discharge channel 11, it will fall onto the discharge assembly 2, and finally the discharge assembly 2 transports the crushed rock slag to the outside of the tunnel, and the reverse thrust of the excavation is borne by the setting of the support shield 6, and the setting of the telescopic assembly 5 can not only provide the propulsion force for advancement, but also The counter torque of excavation is transmitted to the support shield 6. When one excavation is completed, the support shield 6 is driven to separate from the tunnel wall, and the telescopic component 5 is abutted against the newly assembled pipe segment. Then, the end of the telescopic component 5 connected to the front shield 1 is driven to open and contract, and the end of the telescopic component 5 abutting against the pipe segment is driven to start to extend, so that the connecting shield 3 and the support shield 6 move in the excavation direction. During the movement of the connecting shield 3, the seeping liquid on the top wall of the tunnel is collected in the drainage trough 31, and then the accumulated liquid is discharged into the drainage trough 31 through the drainage pipe 4, reducing the probability of liquid damaging the machine. Therefore, through the setting of the connecting shield 3, the TBM shield body structure suitable for the drainage corridor construction environment provided by the utility model is less likely to be damaged, thereby reducing economic losses.
[0047] An optional implementation of this embodiment is as follows: the front shield 1 includes a cutter disc 7, and the cutter disc 7 is connected to the discharge channel 11. Specifically, a disc-shaped roller is provided on the cutter disc 7. When working, the front shield 1 rotates to drive the disc-shaped roller provided on the cutter disc 7 to roll and break rocks.
[0048] An optional implementation of this embodiment is as follows: the discharge assembly 2 includes an arc-shaped sheet 21, a slag collecting bucket 22 and a belt 23, wherein:
[0049] A material drop opening 211 is provided on the arc-shaped piece 21, and the arc-shaped piece 21 is rotatably connected to the front shield 1. Specifically, the convex surface of the arc-shaped piece 21 is arranged to face upward and the arc-shaped piece 21 is fixedly installed, that is, the front shield 1 rotates, the arc-shaped piece 21 is fixed, and the front shield 1 rotates, and at the same time drives the crushed rock slag located in the discharge channel 11 to rotate synchronously. When the discharge channel 11 rotates to be connected with the material drop opening 211, the crushed rock slag falls out of the discharge channel 11 through the material drop opening 211.
[0050] The slag collecting bucket 22 is arranged below the material drop opening 211 , and is used to receive the rock fragments dropped from the material drop opening 211 . Thus, the arrangement of the slag collecting bucket 22 can prevent the rock fragments from scattering when dropping from the material drop opening 211 .
[0051] One end of the belt 23 is connected to the end of the slag collecting bucket 22 away from the arc-shaped piece 21, so that the crushed rock slag will fall into the slag collecting bucket 22 and then slide onto the belt 23, and finally the crushed rock slag will be transported out of the tunnel through the setting of the belt 23.
[0052] An optional implementation of this embodiment is as follows: there are multiple discharge channels 11, and the multiple discharge channels 11 are evenly distributed on the front shield 1 along the circumferential direction of the front shield 1. In this way, the efficiency of transporting crushed rock slag is improved by setting up multiple discharge channels 11.
[0053] An optional implementation of this embodiment is as follows: the connecting shield 3 has a peripheral wall surface, the axis extension direction of the peripheral wall surface is the extension direction of the axis of rotation of the front shield 1, and the drainage groove 31 is located on the peripheral wall surface. The drainage groove 31 located on the peripheral wall surface makes it easier to collect liquid into the drainage groove 31.
[0054] An optional implementation of this embodiment is as follows: it also includes a filter screen 8, which is installed at the notch of the drainage trough 31. In this way, the setting of the filter screen 8 can prevent debris from falling into the drainage trough 31 and clogging it, thereby causing the drainage trough 31 to fail.
[0055] Optionally, the cross-sectional area of the connecting shield 3 gradually decreases from the direction of the supporting shield 6 to the front shield 1. Optionally, the connecting shield 3 is in a truncated cone shape, the small diameter end of the connecting shield 3 is in contact with the front shield 1, and the large diameter end of the connecting shield 3 is connected to the telescopic component 5, that is, the side of the filter screen 8 close to the supporting shield 6 is higher than the side away from the supporting shield 6, that is, a slope is formed, and the bottom of the slope is connected to the front shield 1. When the bottom of the slope is connected to the discharge component 2 on the front shield 1, the debris accumulated on the filter screen 8 will fall into the discharge channel 11 and be discharged through the discharge channel 11, thereby avoiding the accumulation of debris on the filter screen 8 and clogging the filter screen 8.
[0056] An optional implementation of this embodiment is as follows: a drainage port is provided at the bottom of the drainage trough 31, and one end of the drainage pipe 4 is installed at the drainage port. In this way, the liquid in the drainage trough 31 can be discharged more easily through the setting of the drainage port.
[0057] Optionally, an angle α is formed between the bottom wall of the drainage groove 31 and the rotation axis of the front shield 1 . Thus, the angle α is set to facilitate the discharge of liquid in the drainage groove 31 and prevent the liquid from accumulating in the drainage groove 31 .
[0058] Optionally, the value range of the angle α is: 0°<α≤70°. Exemplarily, the angle α can be 10°, 20°, 30°, 40°, 50°, 60 and 70°. If the angle is too small, the liquid at the bottom of the drainage trough 31 cannot flow toward the drainage port. If the angle is too large, the capacity of the drainage trough 31 will be too small, thereby causing it to fail.
[0059] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A TBM shield structure suitable for drainage corridor construction environment, characterized in that: include: A front shield (1) has a discharge channel (11) and is provided with a main drive inside to drive the front shield (1) to rotate. The front shield (1) is used for breaking rocks and loading crushed rock slag; A discharge assembly (2) is connected to the discharge channel (11), and the discharge assembly (2) is used to transport the crushed rock slag; A connecting shield (3), the front shield (1) being rotatably mounted on the connecting shield (3), the connecting shield (3) being provided with a drainage groove (31), the drainage groove (31) being used to receive liquid seeping out from the top of the tunnel; a liquid drain pipe (4) connected to the liquid drain groove (31), the liquid drain pipe (4) being used to drain the accumulated liquid in the liquid drain groove (31); A telescopic component (5), one end of which passes through the connecting shield (3) and is connected to the front shield (1), and the telescopic component (5) is used to drive the front shield (1) and the connecting shield (3) to move; A support shield (6) is connected to the other end of the telescopic assembly (5), and in a working state, the support shield (6) abuts against the tunnel wall.
2. A TBM shield structure suitable for drainage gallery construction environment according to claim 1, characterized in that: The front shield (1) comprises a cutter disc (7), and the cutter disc (7) is connected to the discharge channel (11).
3. A TBM shield structure suitable for drainage corridor construction environment according to claim 2, characterized in that: The discharge assembly (2) comprises: An arc-shaped piece (21), wherein a blanking opening (211) is provided on the arc-shaped piece (21), and the arc-shaped piece (21) is rotatably connected to the front shield (1); A slag collecting bucket (22) is arranged below the material dropping opening (211), and the slag collecting bucket (22) is used to receive the crushed rock slag dropped from the material dropping opening (211); One end of the belt (23) is connected to an end of the slag collecting bucket (22) away from the arc-shaped sheet (21).
4. A TBM shield structure suitable for drainage gallery construction environment according to claim 3, characterized in that: The number of the discharge channels (11) is multiple, and the multiple discharge channels (11) are evenly distributed on the front shield (1) along the circumferential direction of the front shield (1).
5. The TBM shield structure suitable for drainage corridor construction environment according to claim 1, characterized in that: The connecting shield (3) has a peripheral wall surface, the axis of which extends in the same direction as the axis of rotation of the front shield (1), and the drainage groove (31) is located on the peripheral wall surface.
6. A TBM shield structure suitable for drainage gallery construction environment according to claim 5, characterized in that: It also comprises a filter screen (8), wherein the filter screen (8) is installed at the notch of the drainage trough (31).
7. A TBM shield structure suitable for drainage gallery construction environment according to claim 6, characterized in that: The cross-sectional area of the connecting shield (3) gradually decreases in a direction from the supporting shield (6) to the front shield (1).
8. A TBM shield structure suitable for drainage gallery construction environment according to claim 7, characterized in that: The bottom of the drainage groove (31) is provided with a drainage port, and one end of the drainage pipe (4) is installed at the drainage port.
9. A TBM shield structure suitable for drainage gallery construction environment according to claim 8, characterized in that: An angle α is formed between the bottom wall of the drainage groove (31) and the rotation axis of the front shield (1).
10. A TBM shield structure suitable for drainage gallery construction environment according to claim 9, characterized in that: The value range of the angle α is: 0°<α≤70°.