Tunnel steel arch adjusting device

Abstract

The utility model discloses a tunnel steel arch adjusting device which comprises two bases, a plurality of steel arch segments are movably arranged at the tops of the two bases, adjusting assemblies used for adjusting the heights of the steel arch segments are arranged in the bases, and each steel arch segment comprises a steel arch body arranged at the top of the corresponding base and a steel arch body arranged at the top of the corresponding base; the groove is formed in the middle of the steel arch frame body; the multiple supporting assemblies are arranged in the grooves and used for being tightly attached to the surrounding rock on the outer side for supporting, the multiple sections of steel arch frame bodies are driven to move upwards through meshing of the first gears and the racks, so that the multiple sections of steel arch frame bodies can abut against the surrounding rock on the outer side, and the multiple sections of steel arch frame bodies can abut against the surrounding rock on the outer side through the elastic force of springs in the multiple sections of steel arch frame bodies. The supporting plates tend to move outwards, so that the multiple supporting plates are tightly attached to different positions of surrounding rock on the outer side, the surrounding rock is supported, the gap between a steel arch frame body and the surrounding rock is reduced, uneven stress of the arch frame is prevented, and the supporting effect on the tunnel surrounding rock is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of tunnel construction, and in particular to a tunnel steel arch adjustment device. Background Art

[0002] Tunnel steel arch is a steel support structure widely used in tunnel engineering, in which a single steel arch is composed of different arch units. As the initial support structure of the tunnel, the rigidity and stability of the single steel arch are crucial to the overall steel arch support structure. The high-bearing capacity steel arch can effectively prevent the tunnel surrounding rock from excessive deformation, providing structural stability and safety for the tunnel engineering.

[0003] However, in the process of implementing relevant technical solutions, at least the following technical problems were found: after the arch frame units were connected and fixed, there was a gap between the arch frame and the surrounding rock, and the fit was difficult to ensure, resulting in uneven force on the arch frame and unsatisfactory support for the tunnel surrounding rock. In addition, the elevation of the tunnel arch foot was difficult to control, and over-excavation was prone to occur. Utility Model Content

[0004] The present application solves the problem of gaps between the steel arch frame and the surrounding rock in the prior art by providing a tunnel steel arch frame adjustment device, thereby achieving the effect of supporting the surrounding rock in a close fit.

[0005] The present application provides a tunnel steel arch frame adjustment device, comprising two bases, a plurality of steel arch frame segments are movably arranged on the top of the two bases, an adjustment component for adjusting the height of the plurality of steel arch frame segments is arranged inside the bases, and the plurality of steel arch frame segments include: a steel arch frame body, arranged on the top of the two bases; a groove, opened in the middle of the steel arch frame body; a plurality of support components, arranged inside the groove, and the plurality of support components are used to closely support the outer surrounding rock.

[0006] Furthermore, the multiple supporting components include: a support plate, movably connected to the inside of the groove; an insertion rod, inserted and connected to the inner wall of the groove, and the top of the insertion rod is fixedly connected to the support plate; a spring, which is sleeved on the outside of the insertion rod, and the two ends of the spring are respectively between the support plate and the inner wall of the groove.

[0007] Furthermore, a connecting seat is provided on the sides of the plurality of steel arch frame bodies, and two connecting seats are fixedly connected by fastening bolts.

[0008] Furthermore, movable grooves are provided on the tops of the two bases, and fixed seats are provided at the bottoms of the two side steel arch frame bodies. The fixed seats are slidably connected to the inside of the movable grooves, and the adjustment assembly is provided at the bottom of the fixed seats.

[0009] Furthermore, the adjustment assembly includes: a rack fixedly arranged at the bottom of the fixed base; a first gear meshingly connected to one side of the rack; a second gear fixedly arranged on one side of the first gear through a connecting rod; a third gear meshingly connected to one side of the second gear, and the first gear and the third gear are both rotatably connected to the inside of the movable groove; a drive motor detachably mounted on the outside of the base, and the output shaft of the drive motor is fixedly connected to the third gear.

[0010] The technical solution provided by this application has at least the following technical effects or advantages:

[0011] The rotation of the driving motor drives the meshing of the first gear and the rack, driving the multi-section steel arch frame body to move up, so that the multi-section steel arch frame body can be close to the outer surrounding rock, and the elastic force of the springs in the multi-section steel arch frame body makes the multiple support plates close to different positions of the outer surrounding rock to support the surrounding rock, reduce the gap between the steel arch frame body and the surrounding rock, prevent the arch frame from being subjected to uneven force, and ensure the supporting effect on the tunnel surrounding rock. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the regulating device in the embodiment of the present application;

[0013] Figure 2 This is a schematic diagram of the structure of the support assembly in the embodiment of the present application;

[0014] Figure 3 This is a schematic diagram of the cross-sectional structure of the steel arch frame body in the embodiment of the present application;

[0015] Figure 4 This is a schematic diagram of the structure of the adjustment component in the embodiment of the present application;

[0016] In the figure: 10, base; 20, steel arch frame segment; 30, movable groove; 40, adjustment component; 50, connecting seat; 60, fastening bolt; 21, steel arch frame body; 22, groove; 23, support component; 24, fixed seat; 231, support plate; 232, plug rod; 233, spring; 41, rack; 42, first gear; 43, second gear; 44, third gear; 45, drive motor. DETAILED DESCRIPTION

[0017] The embodiment of the present application discloses a tunnel steel arch frame adjustment device, which drives the first gear 42 to rotate by driving the motor 45 so that the rack 41 drives multiple steel arch frame bodies 21 to move up to a suitable height, and cooperates with the elastic force of the spring 233 to make the support plate 231 close to the surrounding rock on the outside to support the surrounding rock, so that the multiple steel arch frame bodies 21 and the support plate 231 are evenly stressed, thereby ensuring the supporting effect on the tunnel surrounding rock.

[0018] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Please refer to Figure 1 , Figure 2 and Figure 3 The present embodiment provides a tunnel steel arch frame adjustment device, comprising two bases 10, a plurality of steel arch frame segments 20 are movably arranged on the top of the two bases 10, an adjustment assembly 40 for adjusting the height of the plurality of steel arch frame segments 20 is arranged inside the base 10, the plurality of steel arch frame segments 20 comprises a steel arch frame body 21, a groove 22, a support assembly 23, and a fixing seat 24, the steel arch frame body 21 is arranged on the top of the two bases 10, the groove 22 is opened in the middle of the steel arch frame body 21, a plurality of support assemblies 23 are arranged inside the groove 22, and the plurality of support assemblies 23 are used to closely support the outer surrounding rock, the sides of the plurality of steel arch frame bodies 21 are all provided with connecting seats 50, the two connecting seats 50 are fixedly connected by fastening bolts 60, the plurality of support assemblies 23 comprise a supporting plate 231, a plug rod 232, a spring 233, and a supporting plate 231. The plate 231 is movably connected to the inside of the groove 22, the rod 232 is inserted and connected to the inner wall of the groove 22, and the top of the rod 232 is fixedly connected to the support plate 231, the spring 233 is sleeved on the outside of the rod 232, and the two ends of the spring 233 are respectively between the support plate 231 and the inner wall of the groove 22, and the multiple steel arch frame bodies 21 are fixed together by fastening bolts 60, so that the steel arch frame forms an overall rigidity, so that the multi-section steel arch frame body 21 can be better close to the surrounding rock on the outside, and the elastic force of the spring 233 drives the support plate 231 and the rod 232 to move outward, so that the multiple support plates 231 are tightly attached to the surrounding rock on the outside, and cooperate with the multi-section steel arch frame body 21 to support the surrounding rock, so as to prevent the uneven force on the steel arch frame body 21 due to the gap between the surrounding rock and the steel arch frame body 21, thereby ensuring the supporting effect on the tunnel surrounding rock.

[0020] Please refer to Figure 1-Figure 4, the tops of the two bases 10 are each provided with a movable groove 30, the bottoms of the two steel arch frame bodies 21 on the sides are provided with a fixed seat 24, the fixed seat 24 is slidably connected to the inside of the movable groove 30, and the adjustment assembly 40 is arranged at the bottom of the fixed seat 24, the adjustment assembly 40 includes a rack 41, a first gear 42, a second gear 43, a third gear 44, and a drive motor 45, the rack 41 is fixedly arranged at the bottom of the fixed seat 24, the first gear 42 is meshedly connected to one side of the rack 41, the second gear 43 is fixedly arranged on one side of the first gear 42 through a connecting rod, the third gear 44 is meshedly connected to one side of the second gear 43, and the first gear 42 and the third gear 44 are both rotatably connected to the inside of the movable groove 30, the drive motor 45 is detachably installed on the outside of the base 10, and the output shaft of the drive motor 45 is fixedly connected to the third gear 44, and the output shaft of the drive motor 45 can extend into the inner part of the base 10 The drive motor 45 can be installed on the base 10 by the cooperation of the buckle and the slot. The drive motor 45 has a self-locking function to prevent the gravity of the multiple steel arch frame bodies 21 from driving the third gear 44 to rotate. The third gear 44 is engaged with the second gear 43 to play the role of a reducer, so that the output shaft of the drive motor 45 can slowly drive the first gear 42 to rotate, so that the first gear 42 drives the rack 41 to move up and down, so that the rack 41 drives the fixed seat 24 to move up, so that the two fixed seats 24 drive the multiple steel arch frame bodies 21 installed together to move upward, so that the steel arch frame body 21 can move upward to the position where the support plate 231 is in close contact with the outer surrounding rock, effectively controlling the relaxation of the surrounding rock and the continued expansion of the plastic zone, and also preventing the phenomenon of over-excavation due to the difficulty in controlling the elevation of the tunnel arch foot. After adjusting the height, the drive motor 45 can be removed from the base 10 to adjust the remaining steel arch frames.

[0021] This application can explain its functional principle through the following operation methods:

[0022] When in use, the connecting seats 50 on the two steel arch frame bodies 21 are brought close together, and the two steel arch frame bodies 21 are fixed by fastening bolts 60, so that multiple steel arch frame bodies 21 are installed and fixed together, and the output shaft of the driving motor 45 is extended into the interior of the base 10 and fixed to the third gear 44, and the driving motor 45 is installed on the card slot of the base 10 through a card block, and the driving motors 45 on the outside of the two bases 10 are started at the same time, so that the output shafts of the two driving motors 45 drive the third gear 44 to rotate, and the rotation of the third gear 44 drives the second gear 43 to mesh, so that the second gear 43 drives the first gear 42 to rotate synchronously through the connecting rod, and the rotation of the first gear 42 drives the rack 41 meshing therewith to move up and down, thereby driving the fixing seat 24 and multiple steel arch frame bodies 21 to move up to a position close to the tunnel surrounding rock, so that The multiple support plates 231 inside the groove 22 are in contact with the surrounding rock. The continued movement of the steel arch frame body 21 causes the support plates 231 to retract into the groove 22, and the spring 233 on the outside of the insertion rod 232 is compressed. After the steel arch frame body 21 moves up to contact the surrounding rock, the elastic force of the spring 233 allows the multiple support plates 231 to fit tightly against the surrounding rock on the outside, filling the gap between the surrounding rock and the steel arch frame body 21, so that the steel arch frame body 21 and the support plates 231 are subjected to more uniform force, effectively controlling the relaxation of the surrounding rock and the continued expansion of the plastic zone. After the multiple steel arch frame bodies 21 are fixed, considering that the steel arch frame needs to withstand long-term loads, the two side steel arch frame bodies 21 are welded and fixed to the base 10 to improve its bearing capacity, and then the drive motor 45 is removed from the base 10, and the remaining steel arch frames are adjusted.

[0023] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0024] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A tunnel steel arch adjustment device, comprising two bases (10), characterized in that: A plurality of steel arch segments (20) are movably arranged on the top of the two bases (10), and an adjustment assembly (40) for adjusting the height of the plurality of steel arch segments (20) is arranged inside the base (10), and the plurality of steel arch segments (20) include: A steel arch frame body (21) is arranged on the top of the two bases (10); A groove (22) is provided in the middle of the steel arch frame body (21); A plurality of support components (23) are arranged inside the groove (22), and the plurality of support components (23) are used to closely contact with the outer surrounding rock for support; The plurality of support assemblies (23) include: A supporting plate (231) movably connected to the interior of the groove (22); An insertion rod (232) is inserted and connected to the inner wall of the groove (22), and the top of the insertion rod (232) is fixedly connected to the supporting plate (231); The spring (233) is sleeved on the outside of the insertion rod (232), and two ends of the spring (233) are respectively located between the support plate (231) and the inner wall of the groove (22).

2. A tunnel steel arch adjustment device as claimed in claim 1, characterized in that: A connection seat (50) is provided on the sides of the plurality of steel arch frame bodies (21), and two connection seats (50) are fixedly connected by fastening bolts (60).

3. The tunnel steel arch adjustment device according to claim 1, characterized in that: The tops of the two bases (10) are each provided with a movable groove (30), the bottoms of the two side steel arch frame bodies (21) are provided with a fixed seat (24), the fixed seat (24) is slidably connected to the inside of the movable groove (30), and the adjustment component (40) is arranged at the bottom of the fixed seat (24).

4. A tunnel steel arch adjustment device as claimed in claim 3, characterized in that: The adjustment component (40) comprises: A rack (41) fixedly disposed on the bottom of the fixing seat (24); A first gear (42) meshingly connected to one side of the rack (41); A second gear (43) is fixedly arranged on one side of the first gear (42) via a connecting rod; A third gear (44) is meshedly connected to one side of the second gear (43), and the first gear (42) and the third gear (44) are both rotatably connected to the inside of the movable groove (30); The driving motor (45) is detachably mounted on the outside of the base (10), and the output shaft of the driving motor (45) is fixedly connected to the third gear (44).

Images