Tunnel primary support leveling device

Abstract

The invention relates to the technical field of tunnel construction, in particular to a tunnel primary support leveling device. The tunnel primary support leveling device comprises a supporting arch frame and a slicking mechanism, wherein the supporting arch frame is provided with an arc-shaped track matched with the outline of a tunnel; the scraping mechanism comprises a frame which is connected to the arc-shaped track and can move along the arc-shaped track, and a scraping plate and a pressure assembly which are arranged on the frame, and the pressure assembly is used for driving the scraping plate to be tightly attached to the tunnel initial supporting surface in the working process. In the working process of the device, the scraping mechanism moves along the arc-shaped track, and meanwhile, the pressure assembly drives the scraping plate to be tightly attached to the tunnel primary support face, so that the scraping plate can make contact with concrete blocks protruding out of the periphery and scrape off the concrete blocks, the flatness of the tunnel primary support face is guaranteed, meanwhile, the precision of the tunnel primary support construction process is improved, and the construction efficiency is improved. And a solid foundation is laid for follow-up waterproof plate laying and secondary lining construction.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, in particular to a tunnel initial support and leveling device. Background Art

[0002] With the rapid development of economy, the progress of society and the rapid changes in science and technology, my country's highway engineering construction has gradually changed from traditional manual and mechanical operations to scientific and technological operations, standardized operations and factory operations. The rapid update of specifications and standards has gradually changed from the early loose standards to the current refined standards. The introduction of standards in various provinces and cities has put forward more stringent requirements for the quality control of tunnel engineering construction.

[0003] The flatness of the tunnel primary support is the basis for safety and quality assurance during construction and use. It has a huge impact on the quality of subsequent waterproofing and secondary lining construction, and is also a difficult point to control during construction. In the current construction process, the leveling is mainly done by wet spraying machine operators or later manual methods. During the operation, the flatness control is difficult and the work efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to provide a tunnel primary support leveling device to solve the technical problems of difficulty in controlling the flatness of the tunnel primary support and low work efficiency in the method of manually leveling the tunnel primary support.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A tunnel initial support leveling device, comprising:

[0007] A supporting arch on which a curved track matching the tunnel contour is arranged;

[0008] The scraping mechanism comprises a frame connected to the arc track and capable of moving along the arc track, and a scraper and a pressure component mounted on the frame, wherein the pressure component is used to drive the scraper to be close to the initial support surface of the tunnel during operation.

[0009] Furthermore, the scraping mechanism further comprises a transverse connecting rod mounted on the frame;

[0010] The pressure assembly includes a spring mounting seat with a hollow structure connected to the transverse connecting rod, a sliding shaft slidably connected to the first spring mounting seat, and a first spring arranged in the first spring mounting seat and connected to the sliding shaft, and the end of the sliding shaft away from the spring mounting seat is connected to the scraper.

[0011] Further, the transverse connecting rod is slidably mounted on the frame;

[0012] The scraping mechanism also includes a thrust assembly mounted on the frame, a power output end of the thrust assembly being connected to the transverse connecting rod, and being used to drive the scraper to move so as to generate shear force on the initial support surface of the tunnel.

[0013] Furthermore, the thrust assembly comprises a telescopic machine, a cylinder body of the telescopic machine is connected to the frame, and a piston rod of the telescopic machine is connected to the transverse connecting rod.

[0014] Furthermore, the thrust assembly also includes a second spring, and two ends of the second spring are respectively connected to the frame and the side of the transverse connecting rod away from the telescopic machine.

[0015] Furthermore, the thrust assembly further comprises a second spring mounting seat and a sliding shaft, wherein:

[0016] The second spring mounting seat is fixedly connected to the frame, and the second spring is arranged therein;

[0017] One end of the sliding shaft is fixedly connected to the side of the transverse connecting rod away from the telescopic machine, and the other end of the sliding shaft is slidably arranged in the second spring mounting seat and connected to the second spring.

[0018] Furthermore, the thrust assembly also includes a pressure sensor arranged between the piston rod end of the telescopic machine and the transverse connecting rod.

[0019] Furthermore, a plurality of guide sleeves are fixedly arranged on the transverse connecting rod at intervals along the length direction thereof;

[0020] The scraping mechanism also includes a plurality of guide rails fixed on the frame in parallel and at intervals, and a plurality of guide sleeves correspond to each other one by one and are slidably sleeved on the plurality of guide rails.

[0021] Furthermore, it also includes a driving mechanism installed on the supporting arch frame, the driving mechanism includes a motor, a driving wheel installed on the output shaft of the motor, an auxiliary guide wheel installed on the supporting arch frame, and a toothed belt wound around the driving wheel and the auxiliary guide wheel, part of the toothed belt extends along the arc track, and the frame is connected to the toothed belt transmission.

[0022] Furthermore, a scraper cutting edge is provided at the front end of the scraper;

[0023] A transverse axis is arranged at the rear end of the scraper, and control wheels are arranged on the transverse axis at equal intervals. The control wheels protrude from a side of the scraper close to the initial support surface of the tunnel.

[0024] Beneficial effects of the present invention:

[0025] The tunnel initial support and leveling device provided by the present invention includes a supporting arch frame and a scraping mechanism, wherein: the supporting arch frame is provided with an arc track adapted to the tunnel contour; the scraping mechanism includes a frame connected to the arc track and capable of moving along the arc track, and a scraper and a pressure assembly installed on the frame, and the pressure assembly is used to drive the scraper to be close to the tunnel initial support surface during operation.

[0026] During the operation of the above-mentioned device, the scraping mechanism moves along the arc track. At the same time, the pressure component drives the scraper to close to the primary support surface of the tunnel, so that the scraper can contact the surrounding protruding concrete blocks and scrape them off, thereby ensuring the flatness of the primary support surface of the tunnel, while improving the accuracy of the primary support construction process of the tunnel, and laying a solid foundation for the subsequent laying of the waterproof board and secondary lining construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A three-dimensional schematic diagram of a tunnel primary support and leveling device provided in an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of a scraping mechanism provided in an embodiment of the present invention;

[0030] Figure 3 A three-dimensional schematic diagram of a scraping mechanism provided in an embodiment of the present invention;

[0031] Figure 4 A schematic top view of a scraping mechanism provided in an embodiment of the present invention;

[0032] Figure 5 When the piston rod of the telescopic machine in the scraping mechanism is retracted Figure 4 Sectional view at AA;

[0033] Figure 6 When the piston rod of the telescopic machine in the scraping mechanism is extended Figure 4 Sectional view at AA;

[0034] Figure 7 for Figure 4 Cross-sectional view at BB;

[0035] Figure 8 A schematic diagram of the installation structure of the control wheel provided in an embodiment of the present invention;

[0036] Fig. 9 A schematic diagram of the installation structure of the protective cover provided in an embodiment of the present invention.

[0037] icon:

[0038] 1-supporting arch frame; 11-arc track; 12-arch frame walking wheel;

[0039] 2-scraping mechanism; 21-frame; 22-scraper; 221-scraper cutting edge; 222-control wheel; 23-pressure assembly; 231-first spring mounting seat; 232-first sliding shaft; 233-first spring; 24-transverse connecting rod; 25-thrust assembly; 251-telescopic machine; 252-second spring; 253-second spring mounting seat; 254-second sliding shaft; 255-pressure sensor; 256-joint; 26-guide sleeve; 27-guide rail; 28-frame walking wheel; 29-protective cover;

[0040] 3-driving mechanism; 31-motor; 32-driving wheel; 33-auxiliary guide wheel; 34-toothed belt. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0043] It should be noted that in the description of the present invention, the terms "connection" and "installation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or connected through an intermediate medium; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Reference Figure 1 and Figure 2 The tunnel initial support and leveling device provided by the present invention comprises:

[0045] Support arch 1, on which an arc-shaped track 11 adapted to the tunnel contour is provided;

[0046] Leveling mechanism 2, including a vehicle frame 21 connected to the arc-shaped track 11 and capable of moving along the arc-shaped track 11, and a scraping plate 22 and a pressure assembly 23 installed on the vehicle frame 21. The pressure assembly 23 is used to drive the scraping plate 22 to closely adhere to the initial support surface of the tunnel during operation.

[0047] During the operation of the above device, the leveling mechanism 2 moves along the arc-shaped track 11. At the same time, the pressure assembly 23 drives the scraping plate 22 to closely adhere to the initial support surface of the tunnel, enabling the scraping plate 22 to contact and scrape off the relatively protruding concrete blocks around it, thereby ensuring the flatness of the initial support surface of the tunnel and improving the accuracy of the tunnel initial support construction process, laying a solid foundation for the subsequent laying of waterproof plates and the construction of secondary lining.

[0048] Continue to refer to Figure 1 , the main part of the support arch 1 is made of multiple 22H steel sections welded longitudinally and transversely. The circumferential direction of the main part is welded and arranged with 22H steel sections according to the tunnel contour line, thereby forming the arc-shaped track 11. Two rows of arch walking wheels 12 are provided at the bottom of the support arch 1, and the support arch 1 can be conveniently moved through the arch walking wheels 12. The arch walking wheels 12 can be pneumatic rubber wheels.

[0049] Continue to refer to Figure 1 , the tunnel initial support leveling device further includes a driving mechanism 3 installed on the support arch 1. The driving mechanism 3 includes a motor 31, a driving wheel 32 installed on the output shaft of the motor 31, an auxiliary guide wheel 33 installed on the support arch 1, and a toothed belt 34 wound around the driving wheel 32 and the auxiliary guide wheel 33. Part of the toothed belt 34 extends along the arc-shaped track 11, and the vehicle frame 21 is connected to the toothed belt 34.

[0050] Specifically, the auxiliary guide wheels 33 are arranged equidistantly on the support arch 1 according to the arc-shaped track 11, and the auxiliary guide wheels 33 are also arranged equidistantly on the top platform of the support arch 1. The auxiliary guide wheels 33 can be made of iron pulleys. A plurality of "U"-shaped steel channels are welded on the support arch 1, and the auxiliary guide wheels 33 are respectively installed on the "U"-shaped steel channels. A driving mechanism is provided at each of the two axial ends of the support arch 1, and one motor 31 is provided at each of the two ends and both sides of the support arch 1. The four motors 31 provide power for the movement of the leveling mechanism 2.

[0051] Refer to Figure 2, the bottom of the frame 21 is provided with frame running wheels 28 connected to the arc track 11. In this embodiment, three sets of frame running wheels 28 are arranged at equal intervals at the bottom of the frame 21 along the running direction of the frame 21, one set (for example, the middle set) of frame running wheels 28 is used as a driving wheel, and the other two sets of frame running wheels 28 are used as driven wheels, and the driving wheel is connected to the toothed belt 34 for transmission.

[0052] Reference Figures 3 to 5 , the scraping mechanism 2 also includes a transverse connecting rod 24 mounted on the frame 21;

[0053] The pressure assembly 23 includes a first spring mounting seat 231 with a hollow structure and connected to the transverse connecting rod 24, a first sliding shaft 232 slidably connected to the first spring mounting seat 231, and a first spring 233 arranged in the first spring mounting seat 231 and connected to the first sliding shaft 232. The end of the first sliding shaft 232 away from the first spring mounting seat 231 is connected to the scraper 22.

[0054] Specifically, the first spring mounting seat 231 is fixed to the transverse connecting rod 24 by bolts, one end of the first sliding shaft 232 is slidably disposed in the first spring mounting seat 231, and the other end of the first sliding shaft 232 is fixed to the scraper 22. The two ends of the first spring 233 are respectively in contact with the transverse connecting rod 24 and the first sliding shaft 232, and the scraper 22 is closely attached to the initial support surface of the tunnel under the elastic force of the first spring 233.

[0055] Reference Figure 5 and Figure 6 , the transverse connecting rod 24 is slidably mounted on the frame 21;

[0056] The scraping mechanism 2 also includes a thrust assembly 25 mounted on the frame 21. The power output end of the thrust assembly 25 is connected to the transverse connecting rod 24, which is used to drive the scraper 22 to move to generate a shear force on the initial support surface of the tunnel. During the leveling operation, the thrust generated by the thrust assembly 25 causes the scraper 22 to generate a shear force on the harder soil.

[0057] Specifically, the thrust assembly 25 includes a telescopic machine 251, a second spring 252, a second spring mounting seat 253 and a second sliding shaft 254, wherein:

[0058] The telescopic machine 251 may be a pneumatic cylinder or a hydraulic cylinder, the cylinder body of the telescopic machine 251 is connected to the vehicle frame 21, and the piston rod of the telescopic machine 251 is connected to the transverse connecting rod 24;

[0059] The two ends of the second spring 252 are respectively connected to the frame 21 and the side of the transverse connecting rod 24 away from the telescopic machine 251;

[0060] The second spring mounting seat 253 is fixed to the frame 21 and a second spring 252 is disposed therein;

[0061] One end of the second sliding shaft 254 is fixed to the side of the transverse connecting rod 24 away from the telescopic mechanism 251 , and the other end of the second sliding shaft 254 is slidably disposed in the second spring mounting seat 253 and connected to the second spring 252 .

[0062] Specifically, the telescopic machine 251 and the second spring 252 are relatively arranged on both sides of the transverse connecting rod 24, the second spring mounting seat 253 is fixed to the frame 21 by screwing or welding, and the second sliding shaft 254 is welded to the side of the transverse connecting rod 24 away from the telescopic machine 251.

[0063] During the leveling operation, when encountering a harder soil block, the telescopic machine 251 pushes the transverse connecting rod 24 and the scraper 22 on the transverse connecting rod 24 to move forward quickly to generate a shear force on the harder soil block. During the process of the piston rod of the telescopic machine 251 retracting, the second spring 252 drives the transverse connecting rod 24 and the scraper 22 on the transverse connecting rod 24 to return to their original positions, and the operation is repeated in this way.

[0064] Furthermore, the thrust assembly 25 also includes a pressure sensor 255 disposed between the piston rod end of the telescopic machine 251 and the transverse connecting rod 24. The pressure sensor 255 is fixed to the piston rod end of the telescopic machine 251 through a joint 256, and the detection surface of the pressure sensor 255 faces the transverse connecting rod 24; a boss is disposed on the transverse connecting rod 24, and the boss can abut against the detection surface of the pressure sensor 255. When the detection value of the pressure sensor 255 exceeds the set value, the piston rod of the telescopic machine 251 extends to generate a shear force on the soil block at a harder location.

[0065] Reference Figure 7 A plurality of guide sleeves 26 are fixedly disposed on the transverse connecting rod 24 at intervals along its length direction;

[0066] The scraping mechanism 2 further comprises a plurality of guide rails 27 fixed on the frame 21 in parallel and at intervals, and a plurality of guide sleeves 26 are corresponding to and slidably sleeved on the plurality of guide rails 27 one by one.

[0067] Specifically, each guide sleeve 26 includes a first portion and a second portion welded on opposite sides of the transverse connecting rod 24, a through hole is opened on the transverse connecting rod 24 corresponding to the central hole of the guide sleeve 26, and the guide rail 27 passes through the central hole of the guide sleeve 26 and the through hole on the transverse connecting rod 24. The guide rail 27 and the guide sleeve 26 are used to guide the transverse connecting rod 24 and the scraper 22 on the transverse connecting rod 24.

[0068] Continue to refer to Figure 3 and Figure 4In this embodiment, the pressure components 23 are provided in multiple groups and are evenly spaced along the length direction of the transverse connecting rod 24. The thrust components 25 are also provided in multiple groups and are evenly spaced along the length direction of the transverse connecting rod 24. The multiple groups of pressure components 23 and thrust components 25 make the force on the scraper 22 more stable.

[0069] Reference Figure 8 As an optional embodiment, the scraper 22 is made of steel plate, and the front end of the scraper 22 is made into an inclined surface to form a scraper cutting edge 221 of the tunnel primary support surface. A transverse axis is installed at the rear end of the scraper 22, and control wheels 222 are arranged at equal intervals on the transverse axis. The control wheels 222 protrude from the side of the scraper 22 close to the tunnel primary support surface. In this embodiment, the control wheel 222 is 2 to 5 mm higher than the top surface of the scraper 22. In the process of the scraping mechanism 2 moving along the arc track 11, the control wheel 222 can rotate relative to the tunnel primary support surface, so that the scraper 22 moves smoothly on the tunnel primary support surface, alleviating the phenomenon of the scraper 22 getting stuck.

[0070] Reference Fig. 9 The scraping mechanism 2 also includes a protective cover 29 which is covered on the frame 21. The protective cover 29 is provided with a through hole for the pressure assembly 23 to extend out. During operation, most of the scraped bumps slide down along the top surface of the protective cover 29.

[0071] The device has the characteristics of simple operation and high precision. Through the device, the flatness quality of the tunnel initial support can be effectively controlled, so that the construction accuracy of the tunnel initial support surface reaches the millimeter level.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tunnel initial support and leveling device, characterized in that: include: A supporting arch (1) on which an arc-shaped track (11) matching the tunnel profile is arranged; The scraping mechanism (2) comprises a frame (21) connected to the arc track (11) and capable of moving along the arc track (11), and a scraper (22) and a pressure assembly (23) mounted on the frame (21), wherein the pressure assembly (23) is used to drive the scraper (22) to be in close contact with the initial support surface of the tunnel during operation.

2. The tunnel initial support and leveling device according to claim 1, characterized in that: The scraping mechanism (2) further comprises a transverse connecting rod (24) mounted on the frame (21); The pressure assembly (23) comprises a first spring mounting seat (231) having a hollow structure and connected to the transverse connecting rod (24), a first sliding shaft (232) slidably connected to the first spring mounting seat (231), and a first spring (233) disposed in the first spring mounting seat (231) and connected to the first sliding shaft (232), wherein one end of the first sliding shaft (232) away from the first spring mounting seat (231) is connected to the scraper (22).

3. The tunnel initial support and leveling device according to claim 2, characterized in that: The transverse connecting rod (24) is slidably mounted on the vehicle frame (21); The scraping mechanism (2) further comprises a thrust assembly (25) mounted on the frame (21), wherein a power output end of the thrust assembly (25) is connected to the transverse connecting rod (24) and is used to drive the scraper (22) to move so as to generate a shear force on the initial support surface of the tunnel.

4. The tunnel initial support and leveling device according to claim 3, characterized in that: The thrust assembly (25) comprises a telescopic machine (251), a cylinder body of the telescopic machine (251) is connected to the vehicle frame (21), and a piston rod of the telescopic machine (251) is connected to the transverse connecting rod (24).

5. The tunnel initial support and leveling device according to claim 4, characterized in that: The thrust assembly (25) further comprises a second spring (252), the two ends of which are respectively connected to the vehicle frame (21) and the side of the transverse connecting rod (24) away from the telescopic machine (251).

6. The tunnel initial support and leveling device according to claim 5, characterized in that: The thrust assembly (25) further comprises a second spring mounting seat (253) and a second sliding shaft (254), wherein: The second spring mounting seat (253) is fixedly connected to the vehicle frame (21), and the second spring (252) is arranged therein; One end of the second sliding shaft (254) is fixedly connected to the side of the transverse connecting rod (24) away from the telescopic machine (251), and the other end of the second sliding shaft (254) is slidably disposed in the second spring mounting seat (253) and connected to the second spring (252).

7. The tunnel initial support and leveling device according to claim 4, characterized in that: The thrust assembly (25) further comprises a pressure sensor (255) arranged between the piston rod end of the telescopic machine (251) and the transverse connecting rod (24).

8. The tunnel initial support and leveling device according to claim 3, characterized in that: The transverse connecting rod (24) is fixedly provided with a plurality of guide sleeves (26) at intervals along its length direction; The scraping mechanism (2) further comprises a plurality of guide rails (27) fixed in parallel and at intervals on the frame (21), and a plurality of guide sleeves (26) correspond to and are slidably sleeved on the plurality of guide rails (27) one by one.

9. The tunnel initial support and leveling device according to any one of claims 1 to 8, characterized in that: The vehicle also comprises a driving mechanism (3) mounted on the supporting arch frame (1), wherein the driving mechanism (3) comprises a motor (31), a driving wheel (32) mounted on the output shaft of the motor (31), an auxiliary guide wheel (33) mounted on the supporting arch frame (1), and a toothed belt (34) wound around the driving wheel (32) and the auxiliary guide wheel (33), wherein a portion of the toothed belt (34) extends along the arc track (11), and the vehicle frame (21) is drivingly connected to the toothed belt (34).

10. The tunnel initial support and leveling device according to any one of claims 1 to 8, characterized in that: The front end of the scraper (22) is provided with a scraper cutting edge (221); A transverse axis is arranged at the rear end of the scraper (22), and control wheels (222) are arranged on the transverse axis at equal intervals. The control wheels (222) protrude from a side of the scraper (22) close to the initial support surface of the tunnel.

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