CN219196038U - Temporary blocking structure for tunnel portal of open cut cable tunnel - Google Patents
Temporary blocking structure for tunnel portal of open cut cable tunnel Download PDFInfo
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- CN219196038U CN219196038U CN202223421717.2U CN202223421717U CN219196038U CN 219196038 U CN219196038 U CN 219196038U CN 202223421717 U CN202223421717 U CN 202223421717U CN 219196038 U CN219196038 U CN 219196038U
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Abstract
The utility model relates to the technical field of engineering construction and discloses a temporary plugging structure for a portal of an open cut cable tunnel, which comprises a front-stage tunnel and a temporary plugging wall, wherein the front-stage tunnel and the temporary plugging wall are provided with concave-convex surfaces which are mutually connected in an adaptive manner, a pre-buried connecting piece is pre-buried on the concave-convex surface of the front-stage tunnel, and a plugging plate welded and fixed with the pre-buried connecting piece is arranged on the concave-convex surface of the temporary plugging wall; longitudinal steel bars are arranged in the early-stage tunnel, one end of each longitudinal steel bar, which is close to the concave-convex surface of the early-stage tunnel, is provided with a steel bar connector, and the embedded connecting pieces are arranged to avoid the longitudinal steel bars. The concave-convex connection can improve the waterproofness of the joint; the safety of the main structure of the early-stage tunnel is not affected when the pre-buried connecting piece is cut off from the plugging plate in a long-term manner; the pre-buried connecting piece avoids the arrangement of the longitudinal steel bars, so that the conflict between the pre-buried connecting piece and the longitudinal steel bars is avoided, the longitudinal steel bars of the front tunnel and the rear tunnel are connected through the steel bar connectors, the connection is convenient, and the safety of the structure is improved.
Description
Technical Field
The utility model relates to the technical field of engineering construction, in particular to a temporary blocking structure for a tunnel portal of an open cut cable tunnel.
Background
With the rapid development of cities, the load of a power grid in a city center is higher and higher, and the large-capacity power supply of the city center is more and more realized by adopting cable tunnels as channels for cable laying. The open cut cable tunnel is one of the main forms of cable tunnel, but because of various reasons, the engineering construction of cable tunnel sometimes adopts the stage construction, and the interface position of this stage construction tunnel and long-term construction tunnel needs to set up a temporary plugging structure this moment. In the past engineering, however, the construction of temporary plugging structures has not received sufficient attention. If the structure is not well processed, the interface position becomes a weak part of the cable tunnel, so that the cable tunnel is easy to suffer from stress concentration, even cracking, water leakage and other diseases at the part.
The temporary plugging structure needs to complete three functions, namely the safety and the waterproof performance of the structure meet the requirements when the construction of the tunnel and the temporary plugging structure is finished in the present period; secondly, the temporary plugging structure can be conveniently removed during construction of the long-term tunnel; thirdly, the long-term tunnel and the current-term tunnel can form a permanent structure with safe structure, water resistance and reliability after being connected.
For example, patent with publication number CN105937248B discloses a method for treating the junction between the segmented construction of the main structure and the temporary plugging wall, in which longitudinal i-beams along the direction of the tunnel are pre-embedded in the bottom plate and the top plate of the tunnel, the front ends of the longitudinal i-beams are connected with the transverse i-beams by welding, the temporary plugging wall is arranged in front of the transverse i-beams, and the L-shaped reinforced concrete wall is poured on the top plate of the tunnel.
The longitudinal I-steel of the construction method is pre-buried in the main structure of the tunnel, and the connection of the longitudinal steel bars of the tunnel has conflict, so that when a secondary structure is newly built in the future, the longitudinal steel bars of the construction method cannot be effectively connected with the longitudinal steel bars of the built primary structure, and the safety of the structure is affected; meanwhile, when long-term construction is carried out, the pre-buried longitudinal I-steel needs to be removed, and the existing main body structure can be damaged.
Disclosure of Invention
The purpose of the utility model is that: the utility model provides a temporary plugging structure for opening a cave of open cut cable tunnel to destroy main part existing structure, influence reinforcing bar later stage connection and the problem of structure security when solving the built-in fitting of temporary plugging structure among the prior art and demolish.
In order to achieve the above purpose, the utility model provides a temporary blocking structure for a portal of an open cut cable tunnel, which comprises a front-stage tunnel and a temporary blocking wall, wherein concave-convex surfaces which are mutually matched and connected are arranged on the front-stage tunnel and the temporary blocking wall, a pre-buried connecting piece is pre-buried on the concave-convex surface of the front-stage tunnel, and a blocking plate which is used for being welded and fixed with the pre-buried connecting piece is arranged on the concave-convex surface of the temporary blocking wall;
the front tunnel is internally provided with longitudinal steel bars extending along the extending direction of the front tunnel, one end, close to the concave-convex surface of the front tunnel, of each longitudinal steel bar is provided with a steel bar connector, and the embedded connecting pieces are arranged to avoid the longitudinal steel bars.
Preferably, a boss extending longitudinally is arranged on the end face of the early-stage tunnel, a lap joint table used for lap joint on the boss is arranged on the temporary plugging wall, the embedded connecting piece is arranged on the boss, and the plugging plate is arranged on the inner side of the lap joint table.
Preferably, the embedded connecting piece comprises embedded angle steel, and the embedded angle steel is arranged at the corner position of the boss, which is used for contacting and supporting the lapping table.
Preferably, the earlier stage tunnel includes two tunnel holes of arranging in parallel, two be provided with the intermediate wall between the tunnel hole, the boss is around two the annular structure that the outer lane of tunnel hole was arranged, pre-buried connecting piece still includes pre-buried steel sheet, pre-buried steel sheet arranges the intermediate wall, pre-buried steel sheet with pre-buried angle steel welding.
Preferably, the plugging plate comprises a flat plate body which is tiled on the temporary plugging wall and reinforcing ribs which are arranged on the flat plate body, wherein the flat plate body is welded and fixed with the embedded connecting piece, and the reinforcing ribs are inserted into tunnel holes of the early-stage tunnel.
Preferably, the reinforcing rib comprises a horizontal rib plate and a vertical rib plate, the horizontal rib plate and the vertical rib plate are vertically arranged, and the horizontal rib plate and the vertical rib plate are welded and fixed with the flat plate body.
Preferably, the junction of earlier stage tunnel and interim shutoff wall still is provided with waterproof construction, waterproof construction's outside still is provided with the protective layer.
Preferably, the waterproof structure comprises a water stop belt and a waterproof coiled material, the water stop belt is stuck at the joint of the early-stage tunnel and the temporary plugging wall, the waterproof coiled material is arranged at the outer side of the water stop belt, and the waterproof coiled material is arranged at the joint of the early-stage tunnel and the temporary plugging wall in two layers.
Preferably, the protective layer comprises a concrete protective layer arranged outside the early-stage tunnel and a masonry protective layer arranged outside the temporary blocking wall.
Preferably, the concave-convex surface depth of the concave-convex surface of the front tunnel and the temporary plugging wall is defined as a, and the range of a is 100-500mm.
Compared with the prior art, the temporary blocking structure for the portal of the open cut cable tunnel has the beneficial effects that: the temporary plugging wall is connected with the front tunnel in a concave-convex way through a concave-convex surface, a plurality of waterproof steps can be formed through concave-convex connection, the contact surface between the temporary plugging wall and the front tunnel is increased, and the waterproof performance of the joint is improved; the pre-buried connecting piece and the plugging plate are used as temporary structures to be welded and fixed, and the safety of the main structure of the early-stage tunnel is not affected when the primary cutting is dismantled and disconnected; the pre-buried connecting piece avoids the arrangement of the longitudinal steel bars, so that the conflict between the pre-buried connecting piece and the longitudinal steel bars is avoided, meanwhile, the longitudinal steel bars of the front tunnel and the rear tunnel are connected through the steel bar connectors, the connection is convenient, the effective connection between the steel bars of the front tunnel and the rear tunnel is ensured, and the safety of the structure is improved.
Drawings
FIG. 1 is a schematic structural view of a temporary closure structure for a portal of an open cut cable tunnel of the present utility model;
FIG. 2 is a schematic structural view of the temporary closure structure of the portal for an open cut cable tunnel of FIG. 1 from another perspective;
FIG. 3 is an assembly schematic diagram of a pre-tunnel and pre-buried connector of the temporary closure structure for the portal of an open cut cable tunnel of the present utility model;
FIG. 4 is a schematic view of the assembly of temporary plugging walls and plugging plates of the temporary plugging structure for the portal of an open cut cable tunnel of the present utility model;
FIG. 5 is a front view of the temporary block wall and block plate assembly of FIG. 4;
FIG. 6 is a schematic structural view of a closure plate of the temporary closure structure for the portal of an open cut cable tunnel of the present utility model;
FIG. 7 is a schematic view of the temporary plugging wall structure of the temporary plugging structure for the portal of the open cut cable tunnel of the present utility model;
FIG. 8 is an enlarged schematic view of the assembly of a pre-tunnel and pre-buried angle steel of the temporary blocking structure for the tunnel portal of the open cut cable tunnel;
FIG. 9 is a schematic diagram of the assembly of a closure plate and pre-buried connectors of the temporary closure structure for the portal of an open cut cable tunnel of the present utility model;
FIG. 10 is a schematic view of the temporary plugging structure of the tunnel portal for an open cut cable tunnel of the present utility model after the waterproof structure and the protective layer are provided;
fig. 11 is an enlarged schematic view of the waterproof structure and the protective layer of fig. 10.
In the figure, 1, earlier stage tunnel, 11, longitudinal reinforcement, 12, reinforcement connector, 13, boss, 2, temporary plugging wall, 21, overlap joint platform, 3, pre-buried connecting piece, 31, pre-buried angle steel, 32, pre-buried steel plate, 4, plugging plate, 41, tiling plate body, 42, horizontal gusset, 43, vertical gusset, 5, waterstop, 6, waterproofing membrane, 7, concrete protection layer, 8, brickwork protection layer.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
The preferred embodiment of the temporary blocking structure for the portal of the open-cut cable tunnel, as shown in fig. 1 to 11, comprises a front-stage tunnel 1 and a temporary blocking wall 2, wherein the front-stage tunnel 1 is a built cable tunnel structure, the temporary blocking wall 2 is used for being arranged at a port of the front-stage tunnel 1 to temporarily block the front-stage tunnel 1, the safety of the front-stage tunnel 1 structure is ensured, and the blocking wall is convenient to detach later. A tunnel hole is formed in the early-stage tunnel 1, and the tunnel hole is used for arranging a cable.
In the embodiment, the height of the front tunnel 1 is 3.3m, the width is 6.1m, the front tunnel 1 adopts symmetrical double-cabin arrangement, the thickness of the lining on the outer side of the front tunnel 1 is 0.4mm, the thickness of the middle wall is 0.3mm, the net height of the single-side tunnel is 2.5m, the width is 2.5m, and the chamfer height is 0.2m. When the early-stage tunnel 1 is plugged, the temporary plugging wall 2 is formed by casting low-strength concrete of C10-C20, so that long-term dismantling is facilitated. The temporary blocking wall 2 has the same sectional size as the early tunnel 1, and the temporary blocking wall 2 has a thickness of 400-500mm.
The front tunnel 1 and the temporary plugging wall 2 are provided with concave-convex surfaces which are mutually connected in an adaptive manner, and the front tunnel 1 and the temporary plugging wall 2 are connected in a concave-convex manner through the concave-convex surfaces. After the concave-convex matching of the front-stage tunnel 1 and the concave-convex surface of the temporary plugging wall 2 is realized, a plurality of waterproof steps can be formed, the contact surface of the temporary plugging wall 2 and the front-stage tunnel 1 is increased, and the waterproof performance of the joint is improved.
The pre-buried connecting piece 3 that is provided with on the concave-convex surface of earlier stage tunnel 1, be provided with shutoff board 4 on the concave-convex surface of interim shutoff wall 2, shutoff board 4 be used for with pre-buried connecting piece 3 welded fastening. The pre-buried connecting piece 3 and the plugging plate 4 are used as temporary structures to be welded and fixed, and the safety of the main structure of the early-stage tunnel 1 is not affected when the primary cutting is dismantled and disconnected. The embedded connecting pieces 3 are arranged avoiding the longitudinal steel bars 11, so that the conflict between the embedded connecting pieces 3 and the longitudinal steel bars 11 is avoided.
In this embodiment, the steel bar connector 12 is a mechanical connector, the steel bar connector 12 is a screw structure as a whole, and the steel bar connector 12 is pre-buried in the early tunnel 1, and the specific structure thereof is the prior art and will not be described in detail here.
Preferably, a boss 13 extending longitudinally is arranged on the end face of the early tunnel 1, a lap joint table 21 for lap joint on the boss 13 is arranged on the temporary plugging wall 2, the embedded connecting piece 3 is arranged on the boss 13, and the plugging plate 4 is arranged on the inner side of the lap joint table 21.
The temporary plugging wall 2 and the earlier tunnel 1 are fixedly lapped through the boss 13 and the lapping table 21, and the boss 13 can lap the temporary plugging wall 2 through the lapping table 21 to support the temporary plugging wall 2. Meanwhile, the mode of lap joint is also convenient for carrying out later dismantling on the temporary plugging wall 2.
The boss 13 is the position of earlier stage tunnel 1 outside, and pre-buried connecting piece 3 arranges on boss 13, and the shutoff board 4 of being convenient for carries out welded fastening with boss 13, also is convenient for later stage cutting simultaneously demolish the fixation between shutoff board 4 and the pre-buried connecting piece 3.
Preferably, the pre-buried connection member 3 includes pre-buried angle steel 31, and the pre-buried angle steel 31 is disposed at a corner position of the boss 13 for contacting and supporting the lapping table 21.
The embedded angle steel 31 is arranged at the corner position of the boss 13, so that two sides of the embedded angle steel 31 are in close contact with the boss 13; the pre-buried angle steel 31 is arranged in the position department that is used for contacting support overlap joint platform 21, and the pre-buried angle steel 31 is arranged in the support position who supports overlap joint platform 21, and pre-buried angle steel 31 supports interim shutoff wall 2 after the welding with shutoff board 4, increases the structural strength of corner.
Preferably, the pre-tunnel 1 comprises two tunnel holes which are arranged in parallel, an intermediate wall is arranged between the two tunnel holes, the boss 13 is of an annular structure which is arranged around the outer rings of the two tunnel holes, the pre-buried connecting piece 3 further comprises a pre-buried steel plate 32, the pre-buried steel plate 32 is arranged on the intermediate wall, and the pre-buried steel plate 32 is welded with the pre-buried angle steel 31.
The embedded angle steel 31 and the embedded steel plate 32 are matched to form an embedded connecting piece 3, and the embedded angle steel 31 and the embedded steel plate 32 are connected to form a whole. In addition, the pre-buried steel plate 32 can increase the welding area between the plugging plate 4 and the pre-buried connecting piece 3, and increase the welding strength between the pre-buried connecting piece 3 and the plugging plate 4.
Taking the specification of the early tunnel 1 in the specific embodiment as an example, the upper end surface of the upper part of the boss 13 is provided with a pre-buried angle steel 31, and the specification of the pre-buried angle steel 31 is L80 multiplied by 8 and is 5700mm long; the outer end surfaces of the two sides of the boss 13 are provided with pre-buried angle steel 31, and the specification of the pre-buried angle steel 31 is L80 multiplied by 8 and is 2820mm long; the upper end face of the lower part of the boss 13 is provided with a pre-buried angle steel 31, and the specification of the pre-buried angle steel 31 is L8 multiplied by 160 and is 2820mm long.
The arrangement mode of the tunnel holes is determined according to the existing engineering condition, and the utility model is not meant to be only aimed at double-hole tunnels which are arranged in parallel left and right. In other embodiments, the early tunnel 1 may also be a single-hole tunnel, a three-hole tunnel, or a multi-hole tunnel arranged in layers.
Preferably, the plugging plate 4 comprises a flat plate body 41 which is paved on the temporary plugging wall 2 and reinforcing ribs which are arranged on the flat plate body 41, wherein the flat plate body 41 is welded and fixed with the embedded connecting piece 3, and the reinforcing ribs are inserted into the tunnel holes of the early-stage tunnel 1.
The reinforcing ribs can strengthen the structural strength of the flat plate body 41, thereby improving the strength of the whole plugging structure. The reinforcing ribs are inserted into the tunnel holes of the front-stage tunnel 1, so that interference between the reinforcing ribs and the end faces of the boss 13 and the front-stage tunnel 1 can be avoided; the size of the reinforcing bars is as large as possible without collision with the early tunnel 1, which is convenient to install.
Preferably, the reinforcing ribs comprise horizontal rib plates 42 and vertical rib plates 43, the horizontal rib plates 42 and the vertical rib plates 43 are vertically arranged, and the horizontal rib plates 42 and the vertical rib plates 43 are welded and fixed with the flat plate body 41.
The horizontal rib plates 42 and the vertical rib plates 43 are vertically staggered, so that the transverse and longitudinal directions of the plugging plate 4 can be respectively structurally reinforced, and the structural strength of the plugging plate 4 is improved.
In this embodiment, the thickness of the flat plate 41 is 10-14mm, and the length and width dimensions of the flat plate 41 are larger than the dimensions of a tunnel hole, so as to ensure that the flat plate 41 can be welded and fixed on the pre-buried angle steel 31 and the pre-buried steel plate 32. The whole plugging plate 4 is formed by splicing two flat plate bodies 41, and the two flat plate bodies 41 are respectively welded and fixed with the embedded angle steel 31 around one tunnel hole.
In the present embodiment, the dimensions of the horizontal rib plate 42 are 10-14mm thick and 160-240mm wide, and the dimensions of the vertical rib plate 43 are 5mm thick and 50-80mm wide, and the lengths of the horizontal rib plate 42 and the vertical rib plate 43 are as long as possible without interfering with the tunnel body; the horizontal rib plates 42 and the vertical rib plates 43 are welded and fixed to the flat plate body 41 at a vertical interval of 300mm and a horizontal interval of 500mm.
Preferably, the junction of the early-stage tunnel 1 and the temporary plugging wall 2 is also provided with a waterproof structure, and the outer side of the waterproof structure is also provided with a protective layer.
The waterproof structure can increase the waterproof property of the joint of the early tunnel 1 and the temporary plugging wall 2, and prevent external water from penetrating into the early tunnel 1. The protective layer can protect the waterproof structure and prevent the waterproof structure from being damaged.
Preferably, the waterproof structure comprises a water stop belt 5 and a waterproof coiled material 6, wherein the water stop belt 5 is stuck at the joint of the early-stage tunnel 1 and the temporary plugging wall 2, the waterproof coiled material 6 is arranged on the outer side of the water stop belt 5, and the waterproof coiled material 6 is arranged with two layers at the joint of the early-stage tunnel 1 and the temporary plugging wall 2.
The water stop 5 is arranged at the joint, the joint is sealed, the waterproof coiled material 6 is arranged at the outer side of the water stop 5, and meanwhile, the two layers of waterproof coiled materials 6 are arranged at the joint, so that the waterproof capability can be further enhanced by being matched with the water stop 5, and the water stop 5 can be further protected. The waterproof roll 6 is wound around the outer end face of the temporary blocking wall 2 in addition to being disposed at the joint. In the embodiment, the water stop belt 5, the early tunnel 1 and the temporary plugging wall 2 are fixed by adhesion, and the waterproof coiled material 6 is a modified self-adhesive asphalt coiled material.
Preferably, the protective layer comprises a concrete protective layer 7 arranged outside the early tunnel 1 and a masonry protective layer 8 arranged outside the temporary blocking wall 2.
The concrete protection layer 7 is arranged on the outer side of the early-stage tunnel 1, the masonry protection layer 8 is arranged on the outer side of the temporary plugging wall 2, the temporary plugging wall 2 needs to be dismantled in the later stage, and the work load of dismantling can be reduced by adopting the masonry protection layer 8, and meanwhile, the cost can be reduced.
Preferably, the concave-convex surface of the front tunnel 1 and the temporary blocking wall 2 is defined to have a concave-convex depth a in a range of 100-500mm.
The concave-convex depth of the concave-convex surfaces of the front-stage tunnel 1 and the temporary plugging wall 2 is the overlap joint length, the range of a is 100-500mm, and the supporting strength between the front-stage tunnel 1 and the temporary plugging wall 2 can be increased.
In summary, the embodiment of the utility model provides a temporary blocking structure for a tunnel portal of an open-cut cable tunnel, which is characterized in that a temporary blocking wall is in concave-convex connection with a front-stage tunnel through a concave-convex surface, the concave-convex connection can form a plurality of waterproof steps, the contact surface between the temporary blocking wall and the front-stage tunnel is increased, and the waterproof performance of a joint is improved; the pre-buried connecting piece and the plugging plate are used as temporary structures to be welded and fixed, and the safety of the main structure of the early-stage tunnel is not affected when the primary cutting is dismantled and disconnected; the pre-buried connecting piece avoids the arrangement of the longitudinal steel bars, so that the conflict between the pre-buried connecting piece and the longitudinal steel bars is avoided, meanwhile, the longitudinal steel bars of the front tunnel and the rear tunnel are connected through the steel bar connectors, the connection is convenient, the effective connection between the steel bars of the front tunnel and the rear tunnel is ensured, and the safety of the structure is improved.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (10)
1. The temporary blocking structure for the portal of the open cut cable tunnel is characterized by comprising a front-stage tunnel and a temporary blocking wall, wherein concave-convex surfaces which are mutually matched and connected are arranged on the front-stage tunnel and the temporary blocking wall, a pre-buried connecting piece is pre-buried on the concave-convex surface of the front-stage tunnel, and a blocking plate which is used for being welded and fixed with the pre-buried connecting piece is arranged on the concave-convex surface of the temporary blocking wall;
the front tunnel is internally provided with longitudinal steel bars extending along the extending direction of the front tunnel, one end, close to the concave-convex surface of the front tunnel, of each longitudinal steel bar is provided with a steel bar connector, and the embedded connecting pieces are arranged to avoid the longitudinal steel bars.
2. The temporary plugging structure for a portal of an open-cut cable tunnel according to claim 1, wherein a boss extending longitudinally is provided on an end face of the pre-tunnel, a lap joint table is provided on the temporary plugging wall for lap joint with the boss, the pre-buried connecting piece is provided on the boss, and the plugging plate is arranged on an inner side of the lap joint table.
3. The temporary plugging structure for a portal for an open-cut cable tunnel according to claim 2, wherein the pre-buried connection member comprises pre-buried angle steel arranged at a corner position of the boss for contact supporting the landing.
4. A temporary blocking structure for a portal in an open cut cable tunnel according to claim 3, wherein the pre-tunnel includes two tunnel holes arranged in parallel, an intermediate wall is provided between the two tunnel holes, the boss is an annular structure arranged around outer rings of the two tunnel holes, the pre-buried connector further includes a pre-buried steel plate arranged on the intermediate wall, and the pre-buried steel plate is welded with the pre-buried angle steel.
5. The temporary plugging structure for a portal for an open-cut cable tunnel according to any one of claims 1 to 4, wherein the plugging plate comprises a flat plate body laid on the temporary plugging wall and reinforcing ribs arranged on the flat plate body, the flat plate body is welded and fixed with the pre-buried connecting piece, and the reinforcing ribs are inserted into tunnel holes of the pre-tunnel.
6. The temporary plugging structure for the portal of the open-cut cable tunnel according to claim 5, wherein the reinforcing ribs comprise horizontal rib plates and vertical rib plates, the horizontal rib plates and the vertical rib plates are vertically arranged, and the horizontal rib plates and the vertical rib plates are welded and fixed with the tile plate body.
7. The temporary plugging structure for a portal for an open-cut cable tunnel according to any one of claims 1 to 4, wherein a waterproof structure is further provided at a junction of the pre-tunnel and the temporary plugging wall, and a protective layer is further provided on an outer side of the waterproof structure.
8. The temporary plugging structure for a portal for an open-cut cable tunnel according to claim 7, wherein the waterproof structure comprises a water stop and a waterproof roll, the water stop is adhered to a joint of the front-stage tunnel and the temporary plugging wall, the waterproof roll is arranged on the outer side of the water stop, and the waterproof roll is arranged with two layers at the joint of the front-stage tunnel and the temporary plugging wall.
9. The temporary plugging structure for a portal for an open-cut cable tunnel according to claim 8, wherein the protective layer comprises a concrete protective layer disposed outside the early-stage tunnel and a masonry protective layer disposed outside the temporary plugging wall.
10. The temporary plugging structure for a portal for an open-cut cable tunnel according to any one of claims 1 to 4, wherein the depth of the concavity and convexity defining the concavity and convexity of the pre-tunnel and the temporary plugging wall is a, and a ranges from 100 to 500mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223421717.2U CN219196038U (en) | 2022-12-16 | 2022-12-16 | Temporary blocking structure for tunnel portal of open cut cable tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223421717.2U CN219196038U (en) | 2022-12-16 | 2022-12-16 | Temporary blocking structure for tunnel portal of open cut cable tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN219196038U true CN219196038U (en) | 2023-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223421717.2U Active CN219196038U (en) | 2022-12-16 | 2022-12-16 | Temporary blocking structure for tunnel portal of open cut cable tunnel |
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| CN (1) | CN219196038U (en) |
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