CN219930759U

CN219930759U - Protective structure of shallow bias tunnel portal

Info

Publication number: CN219930759U
Application number: CN202321679250.3U
Authority: CN
Inventors: 郭翔; 郑钦涛; 程成成; 廖永琪
Original assignee: Zhejiang Communications Construction Group Co Ltd
Current assignee: Zhejiang Communications Construction Group Co Ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-10-31
Anticipated expiration: 2033-06-29

Abstract

The utility model discloses a protective structure of a shallow-buried bias tunnel portal, and relates to the field of tunnel construction. The utility model provides a shallow protective structure who buries bias voltage tunnel portal, includes riser and support frame, the support frame can dismantle the connection side that is close to the tunnel portal at the riser, still includes: the protection mechanism is arranged at the top of the supporting frame in a lifting manner and used for blocking scraps; according to the utility model, through the conical design of the protection plate, when broken stone falls on the surface of the protection plate, the broken stone can slide along with the conical surface of the protection plate, so that the phenomenon that the broken stone is accumulated at the top of the protection plate and the protection plate collapses is avoided, through the arrangement of the limiting mechanism, the vertical position of the protection mechanism can be adjusted to correspond to the height of a tunnel portal in construction, reassembling is not needed, the practicability is high, and through the arrangement of the buffering mechanism, the broken stone falling can be buffered, the broken stone is prevented from directly contacting with the protection plate, and damage of the broken stone to the protection plate is reduced.

Description

Protective structure of shallow bias tunnel portal

Technical Field

The utility model belongs to the technical field of tunnel construction, and particularly relates to a protective structure of a shallow-buried bias tunnel portal.

Background

The bias tunnel is a tunnel with a supporting structure bearing bias load due to obvious asymmetry of surrounding rock pressure caused by various reasons such as topography, geological structure and construction, so that mountain areas in China are criss-cross, topography Liu Jun is dangerous, geological conditions are complex, when a line is arranged along a valley or limited by a line type, the line trend is difficult to be completely perpendicular to a contour line of the topography, in order to avoid high filling, deep walls and large excavation, stability of mountain areas during construction and operation is ensured, tunnel schemes are mostly needed to be adopted to pass through, at this time, shallow buried bias tunnels are formed in an entrance and exit and partial mountain areas of the tunnel, which are usually inclined due to the earth surface and have small burial depths, falling rocks are easy to generate along with release of surrounding rock stress in the tunnel construction process, so that timely initial support is needed to provide support for construction safety and reasonable operation space.

Like in chinese patent application number CN202020558888.1, provide a biasing tunnel portal protective structure, through set up the baffle in the one side that the anti-slide pile kept away from the mountain, and pour the wedge between baffle and anti-slide pile, make anti-slide pile, baffle and wedge three combine, it is good to the supporting effect of mountain, prevented the landslide of mountain when the tunnel excavation effectively, wherein wedge and baffle and anti-slide pile are all fully laminated, improved the fixed effect of being connected of baffle and anti-slide pile.

However, when the protective structure is used, the position of the baffle plate is inconvenient to adjust according to the height of the tunnel portal, so that the protective structure cannot be suitable for other tunnel portals with different heights.

Disclosure of Invention

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a protective structure of a shallow buried bias tunnel portal, which can overcome the problems or at least partially solve the problems.

In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that: the utility model provides a shallow protective structure who buries bias voltage tunnel portal, includes riser and support frame, the support frame can dismantle the connection side that is close to the tunnel portal at the riser, still includes:

the protection mechanism is arranged at the top of the supporting frame in a lifting manner and used for blocking scraps;

the limiting mechanism is arranged in the middle of the supporting frame and used for fixing the regulated protection mechanism;

the supporting mechanism is arranged in the limiting mechanism and used for supporting the stretched limiting mechanism;

the buffer mechanism is arranged at the top of the protection mechanism and is used for protecting the protection mechanism.

Further, the protection mechanism comprises a transverse plate arranged above the support frame, a protection plate is fixed at the top of the transverse plate, a moving strip is fixed at the bottom of the protection plate, and the moving strip penetrates through the top wall of the support frame in a sliding mode.

Further, stop gear is including the pull rod of sliding at the support frame inner wall, the right-hand member of pull rod is fixed with the rectangle strip, be fixed with reset spring between the inner wall of rectangle strip and support frame, a side that the pull rod was kept away from to the rectangle strip is fixed with the inserted bar, the fixed orifices has been seted up to the inside of removal strip, inserted bar joint is in the fixed orifices.

Further, the supporting mechanism comprises a mounting groove formed in one side face of the rectangular strip, a cross rod is fixed in the mounting groove, a supporting block is rotated on the outer surface of the cross rod, an embedded groove is formed in the inner wall of the supporting frame, and the supporting block is clamped in the embedded groove.

Further, buffer gear is including seting up the draw-in groove at the guard plate top, the embedding has the connecting plate in the draw-in groove, the top of connecting plate is fixed with the cotton pad of buffering, the screw hole of looks adaptation has been seted up to the lateral wall of connecting plate and guard plate, threaded hole threaded connection has the pin.

Further, a rectangular block is fixed at the top of the supporting block, and a rectangular groove is formed in the rectangular block.

Further, a connector is fixed at the left end of the pull rod, and an anti-skid groove is formed in the outer surface of the connector.

Further, the protection plate is designed to be in a conical shape for broken stone to slide down.

After the technical scheme is adopted, compared with the prior art, the utility model has the following beneficial effects: through the toper design of guard plate, when the rubble falls on the guard plate surface, can be along with guard plate conical surface landing, avoid falling the stone to pile up at the top of guard plate, make the phenomenon that the guard plate collapses take place, through stop gear's setting, can adjust the epaxial position of protection mechanism vertical direction, make it can be corresponding with the height of construction tunnel portal, do not need to reassemble, the practicality is stronger, through buffer gear's setting, can cushion the rubble that drops, avoid rubble and guard plate direct contact, reduce the damage that the rubble caused the guard plate.

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.

Drawings

In the drawings:

FIG. 1 is a schematic rear view of a support frame structure of a shallow bias tunnel portal protection structure according to the present utility model;

FIG. 2 is a schematic diagram illustrating a front view of a shallow buried bias tunnel portal protection structure according to the present utility model;

FIG. 3 is an enlarged schematic view of the structure A in FIG. 2 in a shallow buried bias tunnel portal protection structure according to the present utility model;

FIG. 4 is a schematic diagram illustrating the structure separation of a buffer mechanism in a shallow-buried bias tunnel portal protection structure according to the present utility model;

fig. 5 is a schematic diagram illustrating the detachment of the supporting mechanism structure in the protection structure of the shallow-buried bias tunnel portal according to the present utility model.

In the figure: 1. a vertical plate; 2. a support frame;

3. a protective mechanism; 31. a cross plate; 32. a protection plate; 33. moving the bar;

4. a limiting mechanism; 41. a pull rod; 42. a rectangular bar; 43. a return spring; 44. a rod; 45. a fixing hole;

5. a support mechanism; 51. a mounting groove; 52. a cross bar; 53. a support block; 54. an embedding groove;

6. a buffer mechanism; 61. a clamping groove; 62. a connecting plate; 63. buffering the cotton pad; 64. a threaded hole; 65. a pin;

7. rectangular blocks; 8. and (5) a connector.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

Example 1:

referring to fig. 1-5, a protection structure of shallow bias tunnel portal includes riser 1 and support frame 2, and support frame 2 detachable connection is near a side of tunnel portal at riser 1 still includes:

the protection mechanism 3 is arranged at the top of the support frame 2 in a lifting manner and used for blocking scraps;

the limiting mechanism 4 is arranged in the middle of the supporting frame 2 and used for fixing the regulated protection mechanism 3;

the supporting mechanism 5 is arranged in the limiting mechanism 4 and used for supporting the stretched limiting mechanism 4;

the buffer mechanism 6, buffer mechanism 6 sets up at the top of protection machanism 3 and is used for protecting protection machanism 3.

Wherein, protection machanism 3 is including setting up the diaphragm 31 in support frame 2 top, and the top of diaphragm 31 is fixed with guard plate 32, and the bottom of guard plate 32 is fixed with movable strip 33, and movable strip 33 slides and runs through the roof of support frame 2.

The limiting mechanism 4 comprises a pull rod 41 sliding on the inner wall of the support frame 2, a rectangular bar 42 is fixed at the right end of the pull rod 41, a reset spring 43 is fixed between the rectangular bar 42 and the inner wall of the support frame 2, an inserting rod 44 is fixed on one side surface of the rectangular bar 42 away from the pull rod 41, a fixing hole 45 is formed in the moving bar 33, and the inserting rod 44 is clamped in the fixing hole 45.

Wherein, the left end of the pull rod 41 is fixed with a connector 8, and the outer surface of the connector 8 is provided with an anti-skid groove.

In the prior art, the position of the baffle plate cannot be adjusted according to the height of the opening, and the baffle plate cannot be suitable for tunnel openings with different heights, so that the following improvement is made, and the concrete implementation mode is as follows:

the movable bar 33 is enabled to move up and down by sliding the movable bar 33 through the top of the supporting frame 2, so that the positions of the transverse plate 31 and the protection plate 32 in the vertical direction are adjusted, and the height of the transverse plate 31 corresponds to the height of the tunnel portal;

specifically, when the position of the protection plate 32 is adjusted, the connector 8 can be pulled leftwards firstly, the connector 8 drives the pull rod 41 and the reset spring 43 to slide leftwards, the inserted link 44 slides along with the pull rod, the reset spring 43 is compressed, the inserted link 44 drops from the fixing hole 45, the restriction on the movable bar 33 is released, the movable bar 33 can slide in the vertical direction, when the movable bar 33 drives the transverse plate 31 to adjust to correspond to the height of the tunnel portal, the connector 8 can be loosened, the rectangular bar 42 and the inserted link 44 are driven to reset, namely slide rightwards by the elasticity of the reset spring 43, the inserted link 44 is inserted into the corresponding fixing hole 45, the movable bar 33 is fixed again, the protection plate 32 is fixed, and then the adjustment operation of the protection plate 32 is completed, and the support frame 2 and the vertical plate 1 can be fixed through bolts, so that the disassembly and assembly are convenient.

Example 2:

The supporting mechanism 5 comprises a mounting groove 51 formed in one side face of the rectangular bar 42, a cross bar 52 is fixed in the mounting groove 51, a supporting block 53 is rotated on the outer surface of the cross bar 52, an embedded groove 54 is formed in the inner wall of the supporting frame 2, and the supporting block 53 is clamped in the embedded groove 54.

The buffer mechanism 6 comprises a clamping groove 61 formed in the top of the protection plate 32, a connecting plate 62 is embedded in the clamping groove 61, a buffer cotton pad 63 is fixed on the top of the connecting plate 62, a threaded hole 64 is formed in the side wall of the connecting plate 62 and the side wall of the protection plate 32 in a matched mode, and a pin 65 is connected in the threaded hole 64 in a threaded mode.

A rectangular block 7 is fixed on the top of the supporting block 53, and a rectangular groove is formed in the rectangular block 7.

The protection plate 32 is "cone-shaped" in design for the broken stone to slide down.

Substantially the same as in example 1, further:

specifically, since the limit mechanisms 4 are provided on both sides of the support frame 2 in order to enhance the stability when the protection plate 32 is supported, when there is only one worker, it is inconvenient to simultaneously pull the pull rods 41 on both sides, resulting in great inconvenience in adjusting the position of the protection plate 32, and the following improvement is made:

through being provided with horizontal pole 52 and the surface rotation of horizontal pole 52 has supporting shoe 53 in mounting groove 51, after the staff pulls left pull rod 41, make rectangular strip 42 break away from with support frame 2, there is certain clearance in the middle, at this moment, can overturn supporting shoe 53, make supporting shoe 53 stand up and loosen pull rod 41, utilize reset spring 43's elasticity, make supporting shoe 53 imbed in embedded groove 54, support rectangular strip 42, at this moment, the staff can change the position, move right pull rod 41, adjust the position of guard plate 32, make it also can adjust when only a staff, it is comparatively convenient, through rectangular piece 7's setting, make things convenient for the staff to pull supporting shoe 53.

It should be noted that, through guard plate 32, can block the rubble, avoid the rubble to cause the injury to constructor, play the guard effect, through the toper design of guard plate 32, when the rubble falls on guard plate 32 surface, can be along with guard plate 32 conical surface and landing, avoid falling the stone to pile up at the top of guard plate 32, the phenomenon that makes guard plate 32 collapse takes place, and through having embedded connecting plate 62 and buffering cotton pad 63 in draw-in groove 61, can cushion the rubble that drops through buffering cotton pad 63's elasticity, avoid rubble and guard plate 32 direct contact, reduce the damage that the rubble caused to guard plate 32, when buffering cotton pad 63 wearing and tearing seriously need be changed, only need twist pin 65, twist out pin 65 from screw hole 64, remove the restriction to connecting plate 62, make connecting plate 62 and buffering cotton pad 63 can dismantle and change, comparatively convenient and fast.

The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the present utility model in any way, although the present utility model has been described in the preferred embodiments, and is not limited thereto.

Claims

1. The utility model provides a shallow protective structure who buries bias voltage tunnel portal, includes riser (1) and support frame (2), support frame (2) detachable connection is close to a side of tunnel portal at riser (1), its characterized in that still includes:

the protection mechanism (3) is arranged at the top of the support frame (2) in a lifting manner and used for blocking scraps;

the limiting mechanism (4) is arranged in the middle of the supporting frame (2) and used for fixing the regulated protection mechanism (3);

the supporting mechanism (5) is arranged in the limiting mechanism (4) and used for supporting the stretched limiting mechanism (4);

the buffer mechanism (6), buffer mechanism (6) set up at the top of protection machanism (3) and be used for protecting protection machanism (3).

2. The protective structure of a shallow buried bias tunnel portal according to claim 1, wherein: the protection mechanism (3) comprises a transverse plate (31) arranged above the support frame (2), a protection plate (32) is fixed at the top of the transverse plate (31), a moving strip (33) is fixed at the bottom of the protection plate (32), and the moving strip (33) penetrates through the top wall of the support frame (2) in a sliding mode.

3. The protective structure of a shallow buried bias tunnel portal according to claim 2, wherein: stop gear (4) are including sliding pull rod (41) at support frame (2) inner wall, the right-hand member of pull rod (41) is fixed with rectangle strip (42), be fixed with reset spring (43) between the inner wall of rectangle strip (42) and support frame (2), one side that pull rod (41) was kept away from to rectangle strip (42) is fixed with inserted bar (44), fixed orifices (45) have been seted up to the inside of removal strip (33), inserted bar (44) joint is in fixed orifices (45).

4. A shallow-buried bias tunnel portal protection structure according to claim 3, wherein: the supporting mechanism (5) comprises a mounting groove (51) formed in one side face of the rectangular strip (42), a cross rod (52) is fixed in the mounting groove (51), a supporting block (53) is rotated on the outer surface of the cross rod (52), an embedded groove (54) is formed in the inner wall of the supporting frame (2), and the supporting block (53) is clamped in the embedded groove (54).

5. The protective structure of a shallow buried bias tunnel portal according to claim 2, wherein: the buffering mechanism (6) comprises a clamping groove (61) formed in the top of the protection plate (32), a connecting plate (62) is embedded in the clamping groove (61), a buffering cotton pad (63) is fixed at the top of the connecting plate (62), a threaded hole (64) which is matched with the side wall of the protection plate (32) is formed in the connecting plate (62), and a pin (65) is connected with the threaded hole (64) in a threaded mode.

6. The shallow-buried bias tunnel portal protection structure according to claim 4, wherein: rectangular blocks (7) are fixed at the tops of the supporting blocks (53), and rectangular grooves are formed in the rectangular blocks (7).

7. A shallow-buried bias tunnel portal protection structure according to claim 3, wherein: the left end of the pull rod (41) is fixedly provided with a connector (8), and the outer surface of the connector (8) is provided with an anti-skid groove.

8. The protective structure of a shallow buried bias tunnel portal according to claim 2, wherein: the protection plate (32) is in a conical shape and is used for breaking stone sliding off.