Structure for preventing collapse of upward slope of tunnel portal

Abstract

The utility model discloses an anti-collapse structure for an upward slope of a tunnel portal, which belongs to the technical field of tunnel construction and comprises a mountain body, and a concrete tunnel is arranged in the mountain body. According to the utility model, the lower upward slope, the buffer plane and the upper upward slope are arranged at the end part of the mountain body and above the concrete tunnel, the lower protection plate is mounted on the lower upward slope through the cooperation of the first anchor rod, the first nut and the lower mounting hole, and the upper protection plate is mounted on the upper upward slope through the cooperation of the second anchor rod, the second anchor rod and the upper mounting hole; the strength of the upward slope and the downward slope is enhanced through the upper protection plate and the lower protection plate; when it rains, the upper protection plate and the lower protection plate are used for preventing rainwater from impacting the upper upward slope and the lower upward slope, the upper water guide groove and the lower water guide groove are used for guiding the rainwater into the two water guide channels, the situation that the rainwater flushes the tunnel portal upward slope and collapses is avoided, and the working quality of the tunnel portal upward slope collapse prevention structure is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction technical field more specifically, relate to a kind of structure of tunnel portal slope. BACKGROUND

[0002] With the construction of high-grade highway, tunnel engineering develops rapidly, large-span, short long tunnel often accompanied by poor geology, with shallow, bias, surrounding rock structure complex and other characteristics, leading to frequent landslide collapse at portal position, collapse easily blocks portal, not only increase the difficulty of portal treatment, but also affect the normal construction of the whole tunnel, thereby causing delay in construction, construction difficulties, economic damage, sometimes even personnel casualties occur, therefore need to ensure that the position of finished hole face does not make side slope too high.

[0003] Through the retrieval, the utility model patent with announcement number CN217735509U discloses a new type of anchor hole wall structure, including the reinforced concrete portal wall of heightening, the back of the reinforced concrete portal wall of heightening is provided with wall back filling structure, and the bottom is connected with foundation through portal wall expansion foundation;The reinforced concrete portal wall of heightening is connected with the sleeve arch set in portal section through tensioning mechanism, and the sleeve arch is connected with the pipe shed deeply into the deep part of tunnel roof slope;The patent can indirectly realize the reliable anchoring effect of portal wall structure and deep rock mass of roof slope by adding tensioning mechanism between sleeve arch and portal wall, effectively improve the anti-overturning and anti-sliding capacity of portal wall, and through high fill, large dip angle backfill construction outside the open tunnel structure behind the portal wall, in turn, effectively reduce the free surface height of roof side slope by high fill behind the portal wall, effectively control the instability collapse and potential sliding risk of roof side slope, and greatly improve the overall stability of roof side slope.

[0004] But the above-mentioned patent still has the following deficiencies: it is inconvenient to quickly discharge the rainwater on the slope, and the rainwater washing the slope also causes the risk of slope collapse, and although the free surface height of the roof side slope is reduced by backfill construction, the slope is not strengthened, which easily leads to the collapse of the slope to the backfill construction, and when the range of collapse is large, the soil will overflow the reinforced concrete portal wall of heightening to block the tunnel portal. For this reason, we propose a structure for preventing the collapse of the tunnel portal slope. UTILITY MODEL CONTENT

[0005] In view of the problems existing in the prior art, the utility model aims to provide a structure for preventing the collapse of the tunnel portal slope.

[0006] To solve the above problems, the utility model adopts the following technical solutions:

[0007] The utility model provides a kind of structure for preventing collapse of tunnel portal upward slope, including mountain, the inside of the mountain is provided with concrete tunnel, the end of the concrete tunnel is provided with concrete portal retaining wall, upper blocking mechanism is arranged between the top of the concrete portal retaining wall and the top of mountain, the top of the concrete tunnel one end is provided with wall backfill layer, the end of the mountain and above wall backfill layer is provided with lower upward slope, the end of the mountain and above lower upward slope is provided with buffer plane, the end of the mountain and above buffer plane is provided with upper upward slope, the two sides of the end of the mountain are provided with water channel respectively, upper protective plate is provided on the upper upward slope, a plurality of upper water guide grooves are provided on the upper protective plate, lower protective plate is provided on the lower upward slope, a plurality of lower water guide grooves are provided on the lower protective plate, the top of the buffer plane is provided with anti-landslide vegetation.

[0008] As a preferred scheme of the utility model, the upper blocking mechanism includes a plurality of second threaded rods fixedly connected to the top of the concrete portal retaining wall and a plurality of first threaded rods fixedly sleeved to the top of the mountain, a steel wire rope net is sleeved between the plurality of first threaded rods and the plurality of second threaded rods, and a hexagonal nut is threadedly installed on each of the plurality of first threaded rods and the plurality of second threaded rods.

[0009] As a preferred scheme of the utility model, a plurality of lower mounting holes are formed in the lower protective plate, a plurality of first anchor rods are fixedly sleeved to the lower upward slope, and the end of each first anchor rod extends to the outside of the lower protective plate through the lower mounting hole and is threadedly installed with a first nut.

[0010] As a preferred scheme of the utility model, a plurality of upper mounting holes are formed in the upper protective plate, a plurality of second anchor rods are fixedly sleeved to the upper upward slope, and the end of each second anchor rod extends to the outside of the upper protective plate through the upper mounting hole and is threadedly installed with a second nut.

[0011] As a preferred scheme of the utility model, the two ends of the lower water guide groove and the upper water guide groove extend above the two water channels respectively.

[0012] As a preferred scheme of the utility model, the outer diameter of the first anchor rod is equal to the inner diameter of the lower mounting hole.

[0013] As a preferred scheme of the utility model, the outer diameter of the second anchor rod is equal to the inner diameter of the upper mounting hole.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] (1) The utility model discloses a lower slope, buffer plane and upper slope are arranged at the end of mountain and above the concrete tunnel, install the lower protection board on the lower slope by the cooperation of first anchor rod, first nut and lower mounting hole, install the upper protection board on the upper slope by the cooperation of second anchor rod, second anchor rod and upper mounting hole, the strength of upper slope and lower slope is enhanced through the upper protection board and lower protection board, when raining, the upper protection board and lower protection board are used to avoid the rainwater impact on the upper slope and lower slope, and the rainwater is guided into two water guide channels through the upper water channel and lower water channel, avoiding the collapse caused by the washing of the rainwater on the hole mouth slope.

[0016] (2) The utility model discloses the anti -landslide vegetation on the buffer plane avoids the collapse of the slope, and the cooperation of first threaded rod, second threaded rod and hexagonal nut is used to install the wire rope net above the slope between the concrete hole mouth retaining wall and mountain, when the slope collapses, the concrete hole mouth retaining wall and wire rope net are used to block the collapsed soil, avoiding that the soil will overflow the concrete hole mouth retaining wall and block the tunnel hole, and the working quality of the tunnel hole slope anti -collapse structure is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of the utility model;

[0018] Figure 2 It is the structure schematic diagram of mountain of the utility model;

[0019] Figure 3 It is the sectional view schematic diagram of mountain of the utility model;

[0020] Figure 4 It is the structure schematic diagram of upper protection board of the utility model;

[0021] Figure 5 It is the structure schematic diagram of lower protection board of the utility model; Figure 3 It is the enlarged schematic diagram of A in the utility model.

[0022] Mark number explanation in drawing:

[0023] 1, mountain; 2, concrete tunnel; 3, concrete hole mouth retaining wall; 4, upper blocking mechanism; 5, wall back backfill layer; 6, lower slope; 7, buffer plane; 8, upper slope; 9, water guide channel; 11, lower protection board; 12, lower water channel; 13, upper protection board; 14, upper water channel; 15, anti -landslide vegetation; 16, first threaded rod; 17, second threaded rod; 18, wire rope net; 19, hexagonal nut; 20, lower mounting hole; 21, first anchor rod; 22, first nut; 23, upper mounting hole; 24, second anchor rod; 25, second nut. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0025] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] Embodiment:

[0028] Please refer to Figures 1-5 A tunnel portal upward slope anti-collapse structure, comprising a mountain body 1, a concrete tunnel 2 arranged in the interior of the mountain body 1, a concrete portal retaining wall 3 arranged at the end of the concrete tunnel 2, an upper blocking mechanism 4 arranged between the top of the concrete portal retaining wall 3 and the top of the mountain body 1, a wall backfill layer 5 arranged at the top of one end of the concrete tunnel 2, a lower upward slope 6 arranged at the end of the mountain body 1 and above the wall backfill layer 5, a buffer plane 7 arranged at the end of the mountain body 1 and above the lower upward slope 6, an upper upward slope 8 arranged at the end of the mountain body 1 and above the buffer plane 7, water guide channels 9 arranged at both sides of the end of the mountain body 1, an upper protective plate 13 arranged on the upper upward slope 8, a plurality of upper water guide grooves 14 arranged on the upper protective plate 13, a lower protective plate 11 arranged on the lower upward slope 6, a plurality of lower water guide grooves 12 arranged on the lower protective plate 11, and anti-landslide vegetation 15 arranged at the top of the buffer plane 7.

[0029] Specifically, please refer to Figure 1 and Figure 2The upper blocking mechanism 4 comprises a plurality of second threaded rods 17 fixedly connected to the top of the concrete portal retaining wall 3 and a plurality of first threaded rods 16 fixedly sleeved to the top of the mountain 1, a steel wire rope net 18 is sleeved between the plurality of first threaded rods 16 and the plurality of second threaded rods 17, and a hexagonal nut 19 is threadedly installed on each of the plurality of first threaded rods 16 and the plurality of second threaded rods 17.

[0030] In the embodiment, the steel wire rope net 18 is installed through cooperation of the first threaded rods 16, the second threaded rods 17 and the hexagonal nuts 19, when the lower and upper slopes 6 and 8 collapse, the collapsed soil is blocked by the concrete portal retaining wall 3 and the steel wire rope net 18, so as to avoid blocking the end of the concrete tunnel 2, and the second threaded rods 17 are precast on the top of the concrete portal retaining wall 3, and the first threaded rods 16 are pre-anchored on the top of the mountain 1.

[0031] Specifically, please refer to Figure 4 and Figure 5 A plurality of lower mounting holes 20 are formed in the lower protection plate 11, a plurality of first anchor rods 21 are fixedly sleeved to the lower slope 6, and the end portions of the first anchor rods 21 extend to the outside of the lower protection plate 11 through the lower mounting holes 20 and are threadedly installed with first nuts 22.

[0032] In the embodiment, the lower protection plate 11 is installed through cooperation of the lower mounting holes 20, the first anchor rods 21 and the first nuts 22, and the first anchor rods 21 are pre-anchored on the lower slope 6.

[0033] Specifically, please refer to Figure 4 and Figure 5 A plurality of upper mounting holes 23 are formed in the upper protection plate 13, a plurality of second anchor rods 24 are fixedly sleeved to the upper slope 8, and the end portions of the second anchor rods 24 extend to the outside of the upper protection plate 13 through the upper mounting holes 23 and are threadedly installed with second nuts 25.

[0034] In the embodiment, the upper protection plate 13 is installed through cooperation of the upper mounting holes 23, the second anchor rods 24 and the second nuts 25, and the second anchor rods 24 are pre-anchored on the upper slope 8.

[0035] Specifically, please refer to Figure 2 and Figure 4 The two ends of the lower water guide groove 12 and the upper water guide groove 14 extend above the two water guide channels 9, respectively.

[0036] In the embodiment, it is ensured that the rainwater guided out of the lower water guide groove 12 and the upper water guide groove 14 can fall into the water guide channels 9.

[0037] Specifically, please refer to Figure 4 and Figure 5 The outer diameter of the first anchor rod 21 is equal to the inner diameter of the lower mounting hole 20.

[0038] In this embodiment, the stability of the first anchor rod 21 passing through the inner cavity of the lower mounting hole 20 is ensured, and the stability of fixing the lower protective plate 11 is ensured.

[0039] Specifically, please refer to Figure 4 and Figure 5 The outer diameter of the second anchor rod 24 is equal to the inner diameter of the upper mounting hole 23.

[0040] In this embodiment, the stability of the second anchor rod 24 passing through the inner cavity of the upper mounting hole 23 is ensured, and the stability of fixing the upper protective plate 13 is ensured.

[0041] Working principle: first, excavate and pour concrete tunnel 2 in the mountain 1, and pour and form concrete portal retaining wall 3 at the end of the concrete tunnel 2, and then pour and fix a plurality of second threaded rods 17 on the top of the concrete portal retaining wall 3, and then anchor a plurality of first threaded rods 16 on the top of the mountain 1, then set the upper wall backfill layer 5 on the top of the concrete tunnel 2, and set the upper and lower slopes 6, 8, and the buffer plane 7 at the end of the mountain 1, and anchor a plurality of first anchor rods 21 and second anchor rods 24 on the lower slope 6 and the upper slope 8 respectively, and then plant anti-landslide vegetation 15 on the top of the buffer plane 7, and then enhance the strength of the buffer plane 7 through the roots of the anti-landslide vegetation 15, and then install the lower protective plate 11 on the lower slope 6 through the cooperation of the first anchor rod 21, the first nut 22 and the lower mounting hole 20, and then install the upper protective plate 13 on the upper slope 8 through the cooperation of the second anchor rod 24, the second anchor rod 24 and the upper mounting hole 23, and then use the upper protective plate 13 and the lower protective plate 11 to avoid rainwater impact on the upper slope 8 and the lower slope 6 when it rains, and then use the upper water channel 14 and the lower water channel 12 to guide the rainwater into the two water channels 9, to avoid the collapse caused by the washing of the rainwater on the portal slope, and finally shield the upper part of the slope through the cooperation of the first threaded rod 16, the second threaded rod 17, the steel wire rope net 18 and the hexagonal nut 19, and when the slope collapses, use the concrete portal retaining wall 3 and the steel wire rope net 18 to block the collapsed soil, to avoid the soil blocking the end of the concrete tunnel 2.

[0042] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme of the present application and the improved concept, which should be covered in the protection scope of the present application.

Claims

1. A structure for preventing collapse of a tunnel portal, comprising a mountain (1), characterized in that: The inside of the mountain (1) is provided with a concrete tunnel (2), the end of the concrete tunnel (2) is provided with a concrete portal retaining wall (3), the top of the concrete portal retaining wall (3) and the top of the mountain (1) are provided with an upper blocking mechanism (4), the top of one end of the concrete tunnel (2) is provided with a wall backfill layer (5), the end of the mountain (1) above the wall backfill layer (5) is provided with a lower inclined slope (6), the end of the mountain (1) above the lower inclined slope (6) is provided with a buffer plane (7), the end of the mountain (1) above the buffer plane (7) is provided with an upper inclined slope (8), both sides of the end of the mountain (1) are respectively provided with a water guide channel (9), the upper inclined slope (8) is provided with an upper guard plate (13), the upper guard plate (13) is provided with a plurality of upper water guide grooves (14), the lower inclined slope (6) is provided with a lower guard plate (11), the lower guard plate (11) is provided with a plurality of lower water guide grooves (12), and the top of the buffer plane (7) is provided with anti-landslide vegetation (15).

2. The tunnel portal anti-collapse structure according to claim 1, characterized in that: The upper blocking mechanism (4) comprises a plurality of second threaded rods (17) fixedly connected to the top of the concrete portal retaining wall (3) and a plurality of first threaded rods (16) fixedly sleeved to the top of the mountain (1), a steel wire rope net (18) is sleeved between the plurality of first threaded rods (16) and the plurality of second threaded rods (17), and a hexagonal nut (19) is threadedly installed on each of the plurality of first threaded rods (16) and the plurality of second threaded rods (17).

3. The tunnel portal anti-collapse structure according to claim 1, characterized in that: A plurality of lower mounting holes (20) are formed in the lower guard plate (11), a plurality of first anchor rods (21) are fixedly sleeved on the lower inclined slope (6), and the ends of the first anchor rods (21) extend to the outside of the lower guard plate (11) through the lower mounting holes (20) and are threadedly installed with first nuts (22).

4. The tunnel portal anti-collapse structure according to claim 1, characterized in that: A plurality of upper mounting holes (23) are formed in the upper guard plate (13), a plurality of second anchor rods (24) are fixedly sleeved on the upper inclined slope (8), and the ends of the second anchor rods (24) extend to the outside of the upper guard plate (13) through the upper mounting holes (23) and are threadedly installed with second nuts (25).

5. The tunnel portal anti-collapse structure according to claim 1, characterized in that: The two ends of the lower water guide groove (12) and the upper water guide groove (14) extend above the two water guide channels (9) respectively.

6. The structure for preventing collapse of a tunnel portal's upside slope according to claim 3, wherein: The outer diameter of the first anchor rod (21) is equal to the inner diameter of the lower mounting hole (20).

7. The structure for preventing collapse of a tunnel portal's upside slope according to claim 4, wherein: The outer diameter of the second anchor rod (24) is equal to the inner diameter of the upper mounting hole (23).

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