Hydraulic inverted arch trestle with telescopic transverse moving type front axle

Abstract

The utility model discloses a hydraulic inverted arch trestle with a telescopic transverse moving type front axle, which belongs to the technical field of tunnel construction and comprises a main trestle, a telescopic front axle device, a lifting component and a rear approach bridge, the rear approach bridge is hinged to the rear end of the main trestle, a rear axle telescopic rod is hinged between the rear approach bridge and the main trestle, and a main bridge deck is arranged on the main trestle. The sliding rail is installed between the main trestles, the moving trolley is movably installed on the sliding rail, the rear end of the telescopic front axle is hinged to the moving trolley, the rear end of the telescopic front axle is hinged to the connecting pedal, the connecting pedal is in lap joint with the main trestles, and the lifting assembly is installed at the front ends of the main trestles and supported at the bottom end of the telescopic front axle. According to the utility model, the construction operation space under the main trestle is increased, the problem of synchronous operation procedure interference of the inverted arch and the deeply-buried central ditch is effectively avoided, the inverted arch is quickly closed to form a ring, the safe excavation step pitch of the inverted arch is controlled, and the construction efficiency of the tunnel inverted arch and the deeply-buried central ditch is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel construction, in particular to a front-bridge telescopic and transversely movable hydraulic inverted arch trestle. Background Art

[0002] With the rapid development of my country's transportation construction, the transportation infrastructure of railway engineering has gradually shifted from mountainous areas to high-altitude cold areas. The construction of high-speed railway tunnels in cold areas usually faces the problem of frost heave construction. In order to solve the problem of tunnel frost heave, most of the deep-buried central ditches at the bottom of the tunnel invert are set up. At present, the deep-buried central ditches of tunnels are mostly constructed by traditional temporary invert trestles or self-propelled hydraulic invert trestles. The above methods can meet the construction requirements of deep-buried ditches to a certain extent, but due to the constraints of construction space and process interference, the inverts and deep-buried central ditches often have unsatisfactory construction efficiency and the tunnel inverts are not closed in time. For example, the deep-buried central ditch of the 2# tunnel in Shenjia Village, Section 13 of the newly built Xicheng Railway is 1.3m deep and 1.12m wide at the bottom. The excavation section area is small, and a deep-buried ditch inspection well needs to be set up every 36m. The construction of the deep-buried central ditch seriously affects the initial support and closure time of the invert, greatly increasing the risk of tunnel excavation safety control. The cross-operation construction efficiency of the deep-buried central ditch and the invert process is low. Utility Model Content

[0003] In view of this, the utility model provides a front-axle telescopic and transversely movable hydraulic inverted arch trestle bridge, which is used to solve the above problems.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A front axle telescopic transverse hydraulic inverted arch trestle comprises: a main trestle, a telescopic front axle device, a lifting assembly, a rear approach bridge and a transverse telescopic rod, wherein the rear approach bridge is hinged at the rear end of the main trestle, a rear axle telescopic rod is hingedly installed between the middle part of the rear approach bridge and the rear end side wall of the main trestle, a main bridge deck is arranged on the main trestle, the telescopic front axle device comprises a telescopic front axle, a sliding track and a moving trolley, the sliding track is installed between the main bridge deck, the moving trolley is movably installed on the sliding track, the rear end of the telescopic front axle is connected to the moving trolley The moving trolley is hinged, the telescopic front axle is located above the main bridge deck, the rear end of the telescopic front axle is hinged with a connecting pedal, the connecting pedal is overlapped on the main bridge deck, the lifting assembly is installed on the front end of the main trestle, and the lifting assembly is supported on the bottom end of the telescopic front axle; a transverse track is provided on the main trestle, a transverse groove is provided at the bottom end of the main bridge deck, a plurality of transverse telescopic rods are installed between the main bridge deck and the inner side wall of the main trestle, and limit plates are provided on both sides of the rear end of the telescopic front axle, and the limit plates are abutted against both sides of the main bridge deck;

[0006] The lifting assembly includes a lifting telescopic rod, a supporting groove and a supporting roller. A pair of the lifting telescopic rods are fixedly installed at the front end of the main trestle. The supporting groove is installed at the top end of the lifting telescopic rod. Both ends of the supporting roller are rotatably installed in the supporting groove.

[0007] Furthermore, an articulated shaft is rotatably mounted on the movable trolley, and the rear end of the telescopic front axle is rotatably connected to the articulated shaft.

[0008] Furthermore, sliding blocks are arranged at both ends of the hinge shaft, and a sliding groove is arranged on the inner side wall of the main trestle, and the sliding blocks are slidably connected in the sliding groove.

[0009] Furthermore, a pair of racks are provided on both sides of the sliding track, and a pair of motors are provided in the moving trolley, the output ends of the motors are respectively facing the inner walls of the main trestle, and the output ends of the motors are provided with gears, which are meshed with the racks.

[0010] Furthermore, a vertical track is provided in the sliding track, the vertical track is located between the two racks, a vertical groove is provided at the bottom end of the moving trolley, and the vertical track is slidably connected to the vertical groove.

[0011] Furthermore, it also includes an inverted arch formwork traction device, which is slidably connected to the main trestle.

[0012] Furthermore, it also includes a mobile lifting trolley, which is slidably installed on the main trestle; the front end bottom surface of the main trestle is provided with a first telescopic supporting leg, and the rear end bottom surface is provided with a second telescopic supporting leg and a rear drive device, and the first telescopic supporting leg, the second telescopic supporting leg, the mobile lifting trolley and the rear drive device are used for the movement of the main trestle. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of a front axle telescopic and transverse hydraulic inverted arch trestle;

[0015] Figure 2 It is a front view of a hydraulic inverted arch trestle with telescopic and transverse movement of the front axle;

[0016] Figure 3It is a top view of a hydraulic inverted arch trestle with telescopic and transverse movement of the front axle;

[0017] Figure 4 It is a schematic diagram of the structure of the main trestle, lifting assembly and mobile trolley;

[0018] Figure 5 This is the bottom view of the main bridge deck;

[0019] Figure 6 It is a schematic diagram of the structure of the mobile car;

[0020] Figure 7 It is a schematic diagram of the structure of the telescopic front axle and the main bridge deck;

[0021] Among them, in the figure:

[0022] 10-main trestle, 11-main bridge deck, 111-transverse groove, 12-slide groove, 13-transverse track, 14-first telescopic support leg, 15-second telescopic support leg, 16-rear drive device, 21-telescopic front bridge, 211-connecting pedal, 212-limiting plate, 22-sliding track, 221-rack, 222-vertical track, 23-moving trolley, 231-articulated shaft, 232-sliding block, 233-motor, 234-gear, 235-vertical groove, 30-lifting assembly, 31-lifting telescopic rod, 32-support groove, 33-support roller, 40-rear approach bridge, 41-rear bridge telescopic rod, 50-transverse telescopic rod, 60-inverted arch template traction device, 70-mobile lifting trolley, 80-first working area, 90-second working area, 100-third working area. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] Refer to the attached Figure 1-7As shown, the utility model provides a front-axle telescopic transverse hydraulic inverted arch trestle, comprising: a main trestle 10, a telescopic front axle device, a lifting assembly 30 and a rear approach bridge 40, the rear approach bridge 40 is hinged at the rear end of the main trestle 10, a rear axle telescopic rod 41 is hingedly installed between the middle part of the rear approach bridge 40 and the rear end side wall of the main trestle 10, a main bridge deck 11 is arranged on the main trestle 10, the telescopic front axle device comprises a telescopic front axle 21, a sliding rail 22 and a moving trolley 23, the sliding rail 22 is installed between the main bridge deck 11, the moving trolley 23 is movably installed on the sliding rail 22, the rear end of the telescopic front axle 21 is hinged with the moving trolley 23, the telescopic front axle 21 is located above the main bridge deck 11, the rear end of the telescopic front axle 21 is hinged with a connecting pedal 211, the connecting pedal 211 is overlapped on the main bridge deck 11, the lifting assembly 30 is installed at the front end of the main trestle 10, and the lifting assembly 30 is supported at the bottom end of the telescopic front axle 21. The lifting assembly 30 lifts the telescopic front bridge 21, and the moving trolley 23 moves on the sliding track 22, so that the telescopic front bridge 21 is extended from the main trestle 10, thereby dividing the invert construction area into three working areas, namely, the first working area 80 for tunnel bottom excavation, slag removal and bottom cleaning, the second working area 90 for central deep buried ditch construction and invert initial support steel frame installation, and the third working area 100 for invert reinforcement installation, template fixing and concrete pouring. After the telescopic front bridge 21 is extended from the main trestle 10, the construction work space under the main trestle 10 is increased, effectively avoiding the interference problem of the synchronous operation process of the invert and the deep buried central ditch. The utility model can also realize the contraction of the telescopic front bridge 21 and the advancement of the main trestle 10 at the same time.

[0026] In a preferred embodiment, a hinge shaft 231 is rotatably mounted on the moving trolley 23, and the rear end of the telescopic front axle 21 is rotatably connected to the hinge shaft 231. The lifting assembly 30 lifts the front end of the telescopic front axle 21, and the telescopic front axle 21 rotates around the axis of the hinge shaft 231 during the process. The bottom end of the telescopic front axle 21 slides on the lifting assembly 30 during the movement of the moving trolley 23.

[0027] In a preferred embodiment, sliding blocks 232 are provided at both ends of the articulated shaft 231, and a slide groove 12 is provided on the inner side wall of the main trestle 10, and the sliding block 232 is slidably connected in the slide groove 12. The telescopic front bridge 21 is rotatably connected to the articulated shaft 231, and the sliding block 232 slides in the slide groove 12 to transmit the force borne by one end of the telescopic front bridge 21 to the main trestle 10, and at the same time, the mobile trolley 23 drags the rear end of the telescopic front bridge 21 to move vertically above the main bridge deck 11.

[0028] Preferably, an embodiment of a front bridge telescopic transverse hydraulic inverted arch trestle also includes a transverse telescopic rod 50, a transverse track 13 is provided on the main trestle 10, a transverse groove 111 is provided at the bottom end of the main bridge deck 11, and a plurality of transverse telescopic rods 50 are installed between the main bridge deck 11 and the inner wall of the main trestle 10, and limit plates 212 are provided on both sides of the rear end of the telescopic front bridge 21, and the limit plates 212 abut against both sides of the main bridge deck 11. The transverse telescopic rods 50 on both sides of the inner wall of the main trestle 10 push the main bridge deck 11 to achieve transverse movement of the main bridge deck 11 through the cooperation of the transverse groove 111 and the transverse track 13, and the transverse movement of the telescopic front bridge 21 is simultaneously achieved through the limitation of the limit plates 212. The two main bridge decks 11 can move transversely in the same direction or in opposite directions.

[0029] In a preferred embodiment, the lifting assembly 30 includes a lifting telescopic rod 31, a support groove 32 and a support roller 33. A pair of lifting telescopic rods 31 are fixedly installed at the front end of the main trestle 10, the support groove 32 is installed at the top of the lifting telescopic rod 31, and both ends of the support roller 33 are rotatably installed in the support groove 32. In this embodiment, while the moving trolley 23 drags the rear end of the telescopic front bridge 21 to move, the bottom surface of the other end of the telescopic front bridge 21 rolls on the support roller 33, reducing the pulling force for dragging the telescopic front bridge 21 to move. When the lifting telescopic rod 31 is extended, the telescopic front bridge 21 is pushed upward by the movement of the support groove 32 and the support roller 33, so that the front part of the telescopic front bridge 21 can be separated from the slag.

[0030] In a preferred embodiment, a pair of racks 221 are provided on both sides of the sliding track 22, and a pair of motors 233 are provided in the moving trolley 23, the output ends of the motors 233 are respectively facing the inner wall of the main trestle 10, and the output ends of the motors 233 are provided with gears 234, which mesh with the racks 221. The motors 233 drive the gears 234 to rotate, and the movement of the moving trolley 23 is realized by the meshing of the gears 234 and the racks 221.

[0031] In a preferred embodiment, a vertical track 222 is provided in the sliding track 22, the vertical track 222 is located between the two racks 221, a vertical groove 235 is provided at the bottom end of the moving trolley 23, and the vertical track 222 is slidably connected to the vertical groove 235. The cooperation between the vertical track 222 and the vertical groove 235 can ensure the stability of the moving trolley 23 when moving.

[0032] Preferably, in an embodiment, a front-axle telescopic and transversely movable hydraulic inverted arch trestle further comprises an inverted arch formwork traction device 60, which is slidably connected to the main trestle 10. The inverted arch formwork traction device 60 is used to pull the inverted arch formwork (not shown in conventional technical drawings) after completing a construction section, and then extend it toward the tunnel and continue to move to carry out the inverted arch construction of the next construction section.

[0033] Preferably, in one embodiment, a front bridge telescopic transverse hydraulic inverted arch trestle also includes a mobile lifting trolley 70, which is slidably mounted on the main trestle 10; the front bottom surface of the main trestle 10 is provided with a first telescopic support leg 14, and the rear bottom surface is provided with a second telescopic support leg 15 and a rear drive device 16, and the first telescopic support leg 14, the second telescopic support leg 15, the mobile lifting trolley 70 and the rear drive device 16 are used for the movement of the main trestle 10. When the telescopic device at the bottom of the mobile lifting trolley 70 is extended, the main trestle 10 is lifted upward, and at the same time, the first telescopic support leg 14 and the second telescopic support leg 15 are separated from the supporting surface, and the rear drive device 16 drives the main trestle 10 to move forward. After the main trestle 10 moves, the first telescopic support leg 14 and the second telescopic support leg 15 are extended to support the main trestle 10, and the mobile lifting trolley 70 moves forward on the main trestle 10, and the inverted arch template traction device 60 also moves on the main trestle 10 after connecting the inverted arch template below, and drags the inverted arch template to move to the next construction section.

[0034] Example 2

[0035] A method for supporting the construction of a tunnel invert and a deep-buried central ditch, comprising the following steps:

[0036] S1. Construction preparation: Before construction, construction personnel shall undergo a safety test and only those who pass the test can enter the construction site; materials shall be brought to the site in a timely manner and stacked neatly as planned; construction machinery shall be overhauled to ensure normal use; only after the preparation work is completed can construction enter the site;

[0037] S2. After the tunnel is excavated to a certain length, the initial invert is cast and backfilled, and the tunnel invert and deep-buried central ditch supporting devices are assembled and accepted;

[0038] S3. According to the tunnel invert excavation length and the buried center ditch construction position, the mobile trolley 23 drives the telescopic front bridge 21 to extend out of the main trestle 10 and extends to a predetermined target length, and the front end of the telescopic front bridge 21 is overlapped on the front muck;

[0039] S4. The space below the tunnel invert and the deep-buried central ditch supporting device is planned as a first work area 80, a second work area 90 and a third work area 100. The first work area 80 is used for tunnel bottom excavation, slag removal and bottom cleaning. The second work area 90 is used for the construction of the central deep-buried ditch and the installation of the initial support steel frame of the invert. The third work area 100 is used for the laying of the invert steel bars, the fixing of the formwork and the pouring of concrete.

[0040] S5. Use the mobile lifting trolley 70, the first telescopic support leg 14, the second telescopic support leg 15, the rear drive device 16, the telescopic front axle device and the lifting assembly 30 to continuously work together to gradually advance the construction progress of the tunnel's deep-buried central ditch and invert arch.

[0041] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0042] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A front axle telescopic and transverse hydraulic inverted arch trestle, characterized in that: include: A main trestle bridge (10), a telescopic front bridge device, a lifting assembly (30), a rear approach bridge (40) and a transverse telescopic rod (50), wherein the rear approach bridge (40) is hinged at the rear end of the main trestle bridge (10), a rear bridge telescopic rod (41) is hingedly installed between the middle part of the rear approach bridge (40) and the rear end side wall of the main trestle bridge (10), a main bridge deck (11) is arranged on the main trestle bridge (10), the telescopic front bridge device comprises a telescopic front bridge (21), a sliding rail (22) and a moving trolley (23), the sliding rail (22) is installed between the main bridge deck (11), the moving trolley (23) is movably installed on the sliding rail (22), the rear end of the telescopic front bridge (21) is hinged to the moving trolley (23), and the telescopic front bridge (21) is hingedly installed between the rear end side wall of the main trestle bridge (10), and the telescopic front bridge (21) is hingedly installed between the rear end side wall of the main trestle bridge (10). 1) located above the main bridge deck (11), the rear end of the telescopic front bridge (21) is hinged with a connecting pedal (211), the connecting pedal (211) is overlapped on the main bridge deck (11), the lifting assembly (30) is installed at the front end of the main trestle (10), and the lifting assembly (30) is supported at the bottom end of the telescopic front bridge (21); a transverse track (13) is provided on the main trestle (10), a transverse groove (111) is provided at the bottom end of the main bridge deck (11), a plurality of transverse telescopic rods (50) are installed between the main bridge deck (11) and the inner side wall of the main trestle (10), and limit plates (212) are provided on both sides of the rear end of the telescopic front bridge (21), and the limit plates (212) are abutted against both sides of the main bridge deck (11); The lifting assembly (30) comprises a lifting telescopic rod (31), a supporting groove (32) and a supporting roller (33); a pair of the lifting telescopic rods (31) are fixedly mounted on the front end of the main trestle (10); the supporting groove (32) is mounted on the top end of the lifting telescopic rod (31); and both ends of the supporting roller (33) are rotatably mounted in the supporting groove (32).

2. The front axle telescopic and transverse hydraulic inverted arch trestle according to claim 1, characterized in that: A hinge shaft (231) is rotatably mounted on the movable trolley (23), and the rear end of the telescopic front axle (21) is rotatably connected to the hinge shaft (231).

3. The front axle telescopic and transverse hydraulic inverted arch trestle according to claim 2, characterized in that: Sliding blocks (232) are provided at both ends of the hinge shaft (231), a sliding groove (12) is provided on the inner side wall of the main trestle (10), and the sliding block (232) is slidably connected in the sliding groove (12).

4. The front axle telescopic and transverse hydraulic inverted arch trestle according to claim 1, characterized in that: A pair of racks (221) are arranged on both sides of the sliding track (22), a pair of motors (233) are arranged in the moving trolley (23), the output ends of the motors (233) are respectively directed toward the inner wall of the main trestle (10), and a gear (234) is arranged at the output end of the motor (233), and the gear (234) is meshed with the racks (221).

5. The front axle telescopic and transverse hydraulic inverted arch trestle according to claim 4, characterized in that: The sliding track (22) is provided with a vertical track (222), and the vertical track (222) is located between the two racks (221). The bottom end of the moving trolley (23) is provided with a vertical groove (235), and the vertical track (222) is slidably connected to the vertical groove (235).

6. The front axle telescopic and transverse hydraulic inverted arch trestle according to claim 1, characterized in that: It also comprises an inverted arch formwork traction device (60), which is slidably connected to the main trestle (10).

7. The front axle telescopic and transverse hydraulic inverted arch trestle according to claim 1, characterized in that: It also includes a mobile lifting trolley (70) which is slidably mounted on the main trestle (10); a first telescopic support leg (14) is arranged on the front bottom surface of the main trestle (10), and a second telescopic support leg (15) and a rear drive device (16) are arranged on the rear bottom surface; the first telescopic support leg (14), the second telescopic support leg (15), the mobile lifting trolley (70) and the rear drive device (16) are used for moving the main trestle (10).

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