Temporary vertical support of large-span shallow-buried excavation tunnel

Abstract

The utility model relates to the technical field of subsurface tunnel supports, and discloses a temporary vertical support of a large-span shallow-buried subsurface tunnel, which comprises symmetrically arranged vertical support profile steels, and the vertical support profile steels on two sides are connected by arranging a transverse adjustable support structure. The transverse adjustable supporting structure can adjust the distance between the vertical supporting section steel on the two sides through the change of the length of the transverse adjustable supporting structure. The transverse adjustable supporting structure is arranged between the vertical supporting section steel on the two sides, and the transverse adjustable supporting structure can adjust the distance between the vertical supporting section steel on the two sides by changing the length of the transverse adjustable supporting structure through folding actions of the first folding frame and the second folding frame. Therefore, the temporary vertical support can be suitable for supporting underground excavated tunnels of different sizes, repeated use is achieved, and compared with the prior art, the temporary vertical support has the advantages of being flexible to use and good in applicability.

Description

Technical Field

[0001] The utility model relates to a temporary vertical support for a shallow-buried dark-digging tunnel with a large span, and belongs to the technical field of dark-digging tunnel supports. Background Art

[0002] Temporary vertical supports for large-span shallow-buried tunnels usually refer to the support structures temporarily used during tunnel excavation to ensure safety and stability during construction. The main purpose of these support structures is to bear the surface and groundwater pressure and prevent soil collapse and groundwater leakage during tunnel excavation.

[0003] In the prior art, the utility model patent with Chinese patent authorization announcement number CN205743919U discloses a temporary vertical support for a large-span shallow-buried dark-cut tunnel, including initial support, secondary lining, tunnel waterproofing layer, rubber sheet, pad, and steel vertical support; wherein the tunnel waterproofing layer is arranged between the initial support and the secondary lining; the rubber sheet clamps the tunnel waterproofing layer, and the pad abuts against the rubber sheet; the steel vertical support is arranged vertically to support the pad. The temporary vertical support for the large-span shallow-buried dark-cut tunnel does not need to be replaced twice. As the initial support of the tunnel is closed into a ring, the temporary vertical support is erected in a timely and direct manner. During the secondary lining, waterproofing is directly constructed, steel bars are tied, and concrete is poured. The temporary support is removed after the concrete reaches the required strength. This saves project costs, shortens construction period, and reduces construction safety hazards.

[0004] Although the above technical solution can provide temporary vertical support for large-span shallow-buried dark-cut tunnels, the vertical support structure is fixed as a whole and cannot be applied to the support of dark-cut tunnels of different sizes, thus having the problem of insufficient applicability. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the utility model provides a temporary vertical support for a large-span shallow buried dark-excavated tunnel.

[0006] The technical solution of the utility model is as follows:

[0007] A temporary vertical support for a large-span shallow buried tunnel comprises symmetrically arranged vertical support steel sections, wherein the vertical support steel sections on both sides are connected by a transversely adjustable support structure, and the transversely adjustable support structure can adjust the spacing between the vertical support steel sections on both sides by changing its own length.

[0008] The laterally adjustable supporting structure comprises a plurality of connecting columns, each of which is connected to a first folding frame arranged in a scissor-shaped structure by means of a connecting block, the middle part of the first folding frame is rotatably connected to the connecting block, the first folding frames on adjacent connecting columns are rotatably connected together by means of a first rotating shaft, first mounting blocks are arranged on the side walls of the vertical supporting steel sections on both sides close to the laterally adjustable supporting structure, each first mounting block is provided with a second folding frame arranged in a "V"-shaped structure, the middle part of the second folding frame is rotatably connected to the first mounting block by means of a second rotating shaft, and the first folding frames on the connecting columns on both sides which are located closest to the vertical supporting steel sections on both sides are rotatably connected to the second folding frames on the corresponding sides by means of a third rotating shaft.

[0009] Wherein, a limiting component is arranged on the laterally adjustable supporting structure, and the limiting component is used to limit the length of the laterally adjustable supporting structure.

[0010] Among them, the limiting component includes a connecting plate, on which are provided symmetrically arranged threaded columns, and a limiting hole is opened on the first folding frame, and the limiting hole is opened on a frame section on one side of the first folding frame. The limiting holes on this side frame section of the first folding frame are evenly arranged along the length direction of the first folding frame, and the threaded column can pass through the limiting hole. The connecting plate is inserted into the limiting holes on both sides of the first folding frame at different positions through the threaded columns on both sides and is locked with a locking nut, so that the unfolding angle of the first folding frame can be limited.

[0011] Among them, each of the connecting columns is provided with a placement groove, the placement groove is set to pass through the side walls of the connecting column, a third folding frame with a scissor-shaped structure is arranged in the placement groove, the middle part of the third folding frame is connected to the connecting column by a fourth rotating shaft, the third folding frames on adjacent connecting columns are rotatably connected together by a fifth rotating shaft, second mounting blocks are arranged on the side walls of the vertical supporting steel sections on both sides close to the horizontally adjustable supporting structure, each second mounting block is provided with a fourth folding frame with a "V"-shaped structure, the middle part of the fourth folding frame is rotatably connected to the second mounting block by a sixth rotating shaft, and the third folding frames on the connecting columns on both sides located closest to the vertical supporting steel sections on both sides are rotatably connected to the fourth folding frames on the corresponding sides by a seventh rotating shaft.

[0012] Wherein, the third folding frame and the first folding frame are arranged perpendicular to each other.

[0013] Among them, limiting frames are arranged on the side walls of the vertical supporting steel sections on both sides that are close to each other. The limiting frames are arranged obliquely on the vertical supporting steel sections. One end of the limiting frame is hinged to the vertical supporting steel section by a hinge, and the other end of the limiting frame is provided with insertion teeth. The end of the limiting frame with the insertion teeth is arranged obliquely downward when the hinge is in a normal state.

[0014] Among them, pin racks are also arranged on the side walls of the vertical supporting steel sections on both sides which are close to each other. The pin racks on both sides are arranged above the limit racks on both sides. A pin plate is rotatably connected to the pin rack, and a counterweight block is arranged in the pin plate. A limit column is also arranged on the pin rack, and a limit strip is opened on the limit rack. When the pin plate is in a vertical posture, the pin plate can pass through the limit strip. Under the action of the counterweight block, the pin plate can be changed to a horizontal posture by overlapping the pin plate, and the pin plate in the horizontal posture cannot pass through the limit strip.

[0015] The utility model has the following beneficial effects:

[0016] The utility model sets a transversely adjustable support structure between the vertical support steel sections on both sides. The transversely adjustable support structure can adjust the spacing between the vertical support steel sections on both sides by changing its own length through the folding action of the first folding frame and the second folding frame, so that the temporary vertical support can be applied to the support of dark excavated tunnels of different sizes and can be reused. At the same time, a limiting component is set to limit the length of the transversely adjustable support structure, so as to ensure that the spacing between the vertical support steel sections on both sides will not change after the temporary vertical support is placed, so as to ensure the support stability of the temporary vertical support. Compared with the prior art, the utility model has the advantages of flexible use and good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 This is the enlarged view of point A;

[0019] Figure 3 This is an enlarged view of point B;

[0020] Figure 4 It is an exploded schematic diagram of the connecting column and the third folding frame in the utility model;

[0021] Figure 5 This is the enlarged view of point C;

[0022] Figure 6 This is a structural schematic diagram of the limit frame folded on the vertical support steel.

[0023] The reference numerals in the figure are as follows:

[0024] 1. Vertical support steel; 2. Connecting column; 3. Connecting block; 4. First folding frame; 5. First rotating shaft; 6. First mounting block; 7. Second folding frame; 8. Second rotating shaft; 9. Third rotating shaft; 10. Connecting plate; 11. Threaded column; 12. Limiting hole; 13. Locking nut; 14. Placement slot; 15. Third folding frame; 16. Fourth rotating shaft; 17. Fifth rotating shaft; 18. Second mounting block; 19. Fourth folding frame; 20. Sixth rotating shaft; 21. Seventh rotating shaft; 22. Limiting frame; 23. Hinge; 24. Inserting teeth; 25. Pin holder; 26. Pin plate; 27. Counterweight block; 28. Limiting column; 29. ​​Limiting strip. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example: Please refer to Figures 1 to 6 The present embodiment provides a temporary vertical support for a large-span shallow-buried dark-excavated tunnel, including vertical support steel sections 1 arranged symmetrically on both sides. The vertical support steel sections 1 on both sides are connected by arranging a transverse adjustable support structure. The transverse adjustable support structure can adjust the spacing between the vertical support steel sections 1 on both sides by changing its own length, so that the temporary vertical support can be suitable for supporting dark-excavated tunnels of different sizes.

[0027] In this embodiment, the laterally adjustable support structure includes a plurality of connecting columns 2, and the specific number of the connecting columns 2 can be determined according to actual conditions. The connecting columns 2 are evenly distributed laterally between the vertical support steel sections 1 on both sides. Each connecting column 2 is connected to a first folding frame 4 in a scissor-shaped structure by setting a connecting block 3, and the middle part of the first folding frame 4 is rotatably connected to the connecting block 3, so that the first folding frame 4 can perform a corresponding opening and closing action on the connecting column 2. In this embodiment, the connecting block 3 is set on both the upper and lower ends of the connecting column 2, and the first folding frame 4 is also set on both the upper and lower ends of the connecting column 2 by rotatably connecting with the corresponding side connecting block 3. The ends of the first folding frames 4 located at the same side of the adjacent connecting columns 2 are rotatably connected together by setting a first rotating shaft 5. Through the above-mentioned setting, the adjacent connecting columns 2 rotate around the first rotating shaft 5 through the middle part of the first folding frame 4 and the end thereof rotates around the second rotating shaft 8, and the spacing between the adjacent connecting columns 2 can be changed accordingly by changing the folding angle of the first folding frame 4.

[0028] The side walls of the vertical support steels 1 on both sides close to the horizontally adjustable support structure are provided with first mounting blocks 6 symmetrically arranged in the upper and lower parts, and the position of the first mounting blocks 6 is adapted to the position of the first folding frame 4. Each first mounting block 6 is provided with a second folding frame 7 arranged in a "V" shape, and the middle part of the second folding frame 7 is rotatably connected to the first mounting block 6 by setting a second rotating shaft 8, and the ends of the first folding frame 4 on the connecting columns 2 on both sides located closest to the vertical support steels 1 on both sides are rotatably connected to the ends of the second folding frames 7 on the corresponding sides by setting a third rotating shaft 9. Through the above-mentioned arrangement, the connecting columns 2 on both sides located closest to the vertical support steels 1 on both sides rotate around the third rotating shaft 9 through the ends of the first folding frame 4, the middle part of the second folding frame 7 rotates around the second rotating shaft 8, and the ends of the second folding frame 7 rotate around the third rotating shaft 9, and the distance between the first folding frame 4 and the corresponding side vertical support steel 1 can be adapted to change by changing the angle of the first folding frame 4 and the angle of the second folding frame 7.

[0029] In order to enable the laterally adjustable support structure to fix the changed length after its own length changes, so as to ensure the subsequent support stability. In this embodiment, the laterally adjustable support structure is also provided with a limiting component for limiting the length of the laterally adjustable support structure. The limiting component includes a connecting plate 10, on which are provided symmetrically arranged threaded columns 11, and limiting holes 12 are provided on the first folding frames 4 on both sides of one of the connecting columns 2 of the laterally adjustable support structure. The limiting holes 12 are provided on one of the side frame sections of the first folding frame 4 here, and the limiting holes 12 are evenly arranged on this side frame section of the first folding frame 4 along the length direction of the first folding frame 4. The threaded columns 11 can pass through the limiting holes 12, and the connecting plate 10 passes through the two side threaded columns 11 into the two side limiting holes 12 at different positions on the first folding frame 4 and is locked with the locking nut 13, so as to limit the unfolding angle of the first folding frame 4 on this side. Through the above-mentioned settings, according to the unfolding angle of the first folding frame 4, the threaded column 11 is inserted into the limiting hole 12 at the corresponding position and the locking nut 13 is locked, so that the connecting plate 10 can fix the unfolding angle of the first folding frame 4 at this time. When the unfolding angle of the first folding frame 4 is fixed at this point, at this time, since the length change of the transversely adjustable support structure depends on the angle change of the first folding frame 4 and the second folding frame 7, if one angle cannot be changed, the overall degree of freedom is insufficient, and the transversely adjustable support structure cannot change its length, thereby achieving the fixation of the transversely adjustable support structure.

[0030] In order to further improve the structural stability of the laterally adjustable support structure when the length changes, a placement groove 14 is opened inside each connecting column 2. The placement groove 14 is arranged to pass through the side walls of the connecting column 2. A third folding frame 15 with a scissor-shaped structure is arranged in the placement groove 14. The third folding frame 15 and the first folding frame 4 are arranged perpendicular to each other to provide support from different directions. The middle part of the third folding frame 15 is connected to the connecting column 2 by setting a fourth rotating shaft 16, and the two ends of the third folding frame 15 extend from the placement groove 14 to the outside of the connecting column 2. The third folding frames 15 on adjacent connecting columns 2 are rotatably connected together by setting a fifth rotating shaft 17. Second mounting blocks 18 are provided on the side walls of the vertical support steels 1 on both sides close to the laterally adjustable supporting structure. A fourth folding frame 19 arranged in a "V" shape is provided on each second mounting block 18. The middle part of the fourth folding frame 19 is rotatably connected to the second mounting block 18 by setting a sixth rotating shaft 20. The third folding frames 15 on the connecting columns 2 on both sides that are located closest to the vertical support steels 1 on both sides are rotatably connected to the fourth folding frames 19 on the corresponding side by setting a seventh rotating shaft 21. Through the above arrangement, when the length of the laterally adjustable support structure changes, the third folding frame 15 rotates around the fourth rotating shaft 16 in the middle and the fifth rotating shaft 17 and the seventh rotating shaft 21 at the ends, and the fourth folding frame 19 rotates around the sixth rotating shaft 20 in the middle and the seventh rotating shaft 21 at the ends, so as to adapt to the length change of the laterally adjustable support structure. Since the third folding frame 15 and the fourth folding frame 19 are arranged vertically with the first folding frame 4 and the second folding frame 7, during the length change of the laterally adjustable support structure, the first folding frame 4 and the second folding frame 7 can provide vertical limit, and the third folding frame 15 and the fourth folding frame 19 can provide horizontal limit, so as to ensure the structural stability of the laterally adjustable support structure when the length changes.

[0031] In order to facilitate the standing of the vertical support steels 1 on both sides, limit frames 22 are arranged on the side walls of the vertical support steels 1 on both sides that are close to each other. The limit frames 22 are arranged at an angle on the vertical support steels 1. One end of the limit frame 22 is hinged to the vertical support steel 1 by setting a hinge 23, and the other end of the limit frame 22 is provided with an insertion tooth 24. The end of the limit frame 22 with the insertion tooth 24 is arranged at an angle downward when the hinge 23 is in a normal state, and the horizontal height of the insertion tooth 24 is not higher than the horizontal height of the bottom of the corresponding side vertical support steel 1, so that the subsequent insertion tooth 24 can be inserted into the standing surface of the vertical support steel 1 to provide the required standing support for the vertical support steel 1.

[0032] To facilitate the storage of the limit frame 22, pin frames 25 are also provided on the side walls of the vertical supporting steel sections 1 on both sides that are close to each other. The pin frames 25 on both sides are arranged above the limit frames 22 on both sides. A pin plate 26 is rotatably connected to the pin frame 25, and a counterweight block 27 is arranged in the pin plate 26. A limit column 28 is also arranged on the pin frame 25. A limit opening strip 29 is opened on the limit frame 22. When the pin plate 26 is in a vertical position, the pin plate 26 can pass through the limit opening strip 29. Under the action of the counterweight block 27, the pin plate 26 can be changed to a horizontal position by overlapping the pin plate 26. The pin plate 26 in the horizontal position cannot pass through the limit opening strip 29.

[0033] The working principle of the utility model is that when the temporary vertical support is used, first, the limit frame 22 is folded onto the vertical support steel 1, so that the pin plate 26 is in a horizontal state and the limit frame 22 is restricted by the limit mouth strip 29 to prevent the limit frame 22 from affecting the movement of the vertical support steel 1. After that, the temporary vertical support is moved to the corresponding position, and the vertical support steels 1 on both sides are placed on the standing surface. The distance between the vertical support steels 1 on both sides is adjusted by adjusting the length of the horizontally adjustable support structure to adapt to the support of the dark excavated tunnel of the corresponding size. After the distance between the vertical support steels 1 on both sides is adjusted, the pin plate 26 is flipped up to make the pin plate 26 in a vertical position. At this time, the limit frame 22 can be reset under the action of the hinge 23. During the resetting process of the limit frame 22, it can pass through the pin plate 26 through the limit strip 29 and can be reset smoothly without being blocked by the pin plate 26. Afterwards, the vertical support steel 1 can be fixed by inserting the insertion teeth 24 of the limit frame 22 into the corresponding standing surface.

[0034] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A temporary vertical support for a large-span shallow-buried tunnel, comprising symmetrically arranged vertical support steel sections (1), characterized in that: The vertical support steel sections (1) on both sides are connected by arranging a transversely adjustable support structure, and the transversely adjustable support structure can adjust the spacing between the vertical support steel sections (1) on both sides by changing its own length.

2. The temporary vertical support for a large-span shallow-buried tunnel according to claim 1 is characterized by: The transversely adjustable support structure comprises a plurality of connecting columns (2), each connecting column (2) being connected to a first folding frame (4) arranged in a scissor-shaped structure by means of a connecting block (3), the middle portion of the first folding frame (4) being rotatably connected to the connecting block (3), the first folding frames (4) on adjacent connecting columns (2) being rotatably connected together by means of a first rotating shaft (5), the side walls of the vertical support steel sections (1) on both sides being close to the transversely adjustable support structure being provided with a first mounting block (6), each first mounting block (6) being provided with a second folding frame (7) arranged in a "V"-shaped structure, the middle portion of the second folding frame (7) being rotatably connected to the first mounting block (6) by means of a second rotating shaft (8), the first folding frames (4) on the connecting columns (2) on both sides being located closest to the vertical support steel sections (1) on both sides being rotatably connected to the second folding frames (7) on the corresponding sides by means of a third rotating shaft (9).

3. The temporary vertical support for a large-span shallow-buried tunnel according to claim 2 is characterized by: A limiting component is arranged on the laterally adjustable supporting structure, and the limiting component is used to limit the length of the laterally adjustable supporting structure.

4. The temporary vertical support for a large-span shallow-buried tunnel according to claim 3 is characterized by: The limiting component comprises a connecting plate (10), the connecting plate (10) is provided with symmetrically arranged threaded columns (11), the first folding frame (4) is provided with a limiting hole (12), the limiting hole (12) is provided on a frame section on one side of the first folding frame (4), the limiting holes (12) are evenly arranged on the frame section on the side of the first folding frame (4) along the length direction of the first folding frame (4), the threaded columns (11) can pass through the limiting holes (12), the connecting plate (10) is inserted into the limiting holes (12) at different positions on the first folding frame (4) through the threaded columns (11) on both sides and locked with locking nuts (13), so that the unfolding angle of the first folding frame (4) can be limited.

5. The temporary vertical support for a large-span shallow-buried tunnel according to claim 2 is characterized by: Each of the connecting columns (2) is provided with a placement groove (14), the placement groove (14) is arranged to pass through the side walls of the connecting column (2), a third folding frame (15) arranged in a scissor-shaped structure is arranged in the placement groove (14), the middle part of the third folding frame (15) is connected to the connecting column (2) by arranging a fourth rotating shaft (16), and the third folding frames (15) on adjacent connecting columns (2) are rotatably connected together by arranging a fifth rotating shaft (17), and the vertical support steel sections (1) on both sides are close to the horizontal A second mounting block (18) is provided on the side wall of the adjustable support structure, and a fourth folding frame (19) is provided on each second mounting block (18) in a "V"-shaped structure. The middle portion of the fourth folding frame (19) is rotatably connected to the second mounting block (18) by means of a sixth rotating shaft (20), and the third folding frames (15) on the two side connecting columns (2) located closest to the two side vertical support steel sections (1) are rotatably connected to the corresponding side fourth folding frames (19) by means of a seventh rotating shaft (21).

6. The temporary vertical support for a large-span shallow-buried tunnel according to claim 5 is characterized by: The third folding frame (15) and the first folding frame (4) are arranged perpendicular to each other.

7. The temporary vertical support for a large-span shallow-buried tunnel according to claim 1 is characterized by: Limiting frames (22) are arranged on the side walls of the vertical support steels (1) on both sides that are close to each other. The limiting frames (22) are arranged on the vertical support steels (1) in an inclined manner. One end of the limiting frame (22) is hinged to the vertical support steel (1) by means of a hinge (23). The other end of the limiting frame (22) is provided with an insertion tooth (24). The end of the limiting frame (22) provided with the insertion tooth (24) is arranged downwardly in an inclined manner when the hinge (23) is in a normal state.

8. The temporary vertical support for a large-span shallow-buried tunnel according to claim 7 is characterized by: Pin racks (25) are also provided on the side walls of the vertical support steel sections (1) close to each other. The pin racks (25) on both sides are arranged above the limit racks (22) on both sides. A pin plate (26) is rotatably connected to the pin rack (25). A counterweight (27) is arranged in the pin plate (26). A limit column (28) is also provided on the pin rack (25). A limit opening (29) is provided on the limit rack (22). When the pin plate (26) is in a vertical posture, the pin plate (26) can pass through the limit opening (29). Under the action of the counterweight (27), the pin plate (26) can be changed to a horizontal posture by overlapping the pin plate (26). The pin plate (26) in the horizontal posture cannot pass through the limit opening (29).

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