CN217327344U - Quick repair structure of original tunnel - Google Patents
Quick repair structure of original tunnel Download PDFInfo
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- CN217327344U CN217327344U CN202220928808.6U CN202220928808U CN217327344U CN 217327344 U CN217327344 U CN 217327344U CN 202220928808 U CN202220928808 U CN 202220928808U CN 217327344 U CN217327344 U CN 217327344U
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Abstract
The utility model relates to a quick repair structure of an original roadway, which comprises a roadway, wherein a concrete injection layer is arranged on the inner surface of the roadway, a steel plate protective layer is laid on the surface of the concrete injection layer, an anchor rod which is driven into bedrock is distributed on the surface of an arch part of the roadway, and the tail end of the anchor rod is provided with a thread part and penetrates out of the concrete injection layer and the steel plate protective layer; the steel bar net covering the surface of the arch part of the tunnel is embedded in the concrete spraying layer of the arch part of the tunnel. The utility model has reasonable design and novel structure, replaces the traditional concreting with the sprayed concrete, has thinner concrete layer, short setting time, little influence on production, can not delay the time of normal production and can realize quick repair; the steel plate protective layer of assembled structure is used in the cooperation, and whole supporting strength is high, and the concrete spraying layer can not drop, and effectively protects the tunnel internal surface not to receive the damage of colliding with.
Description
Technical Field
The utility model relates to an underground works technical field, especially a quick restoration structure in original tunnel.
Background
The roadway is a common key project of an underground mine, and most of main developed transportation roadways (such as adit, vein edge and vein penetration) built in the capital construction period are naked roadways. After the construction period of years is over, the weathering of the rock on the inner surface of the tunnel is serious, the surfaces of the top plate and the side wall are extremely broken and uneven, and the whole tunnel is poor in forming and appearance. Under the extrusion effect of the ground stress in all directions, the phenomena of bottom heave and the like often occur in the roadway, the shape and the size of the cross section of the roadway are reduced, the normal operation of workers and various kinds of transportation equipment is seriously influenced, and the normal ventilation volume of the roadway cannot be ensured. Particularly, after secondary disturbance of projects such as blasting of surrounding working faces and the like, the ground stress is redistributed, safety accidents such as falling and rib spalling of a roadway are easy to happen, great potential safety hazards exist, and even workers can die. Under the background, the cost for abandoning the original roadway and newly developing a new roadway is extremely high, the construction period is too long, and the time for normal production is seriously delayed. Therefore, the rapid repair of the original roadway is an important problem that decision makers at all levels must think and solve. At present, the repair method and the structure of the original roadway are single, and in order to drive the production time of many mines, concrete is poured on the broken side wall of the original roadway again usually. However, the concrete pouring layer is usually thick, the solidification period is long, the designed support strength can be achieved within 14 days, the production period is greatly delayed, the normal operation of personnel, materials and equipment is stopped, and the production profit of enterprises is seriously reduced; a large number of templates need to be repeatedly erected and disassembled, the construction process is complicated, the workload is large, a large amount of labor is consumed, and the production cost is increased.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a construction cycle is short, and the quick restoration structure in original tunnel that whole support intensity is high can realize quick restoration, and is little to the production influence.
The utility model discloses a following scheme realizes: a rapid repair structure of an original roadway comprises the roadway, wherein a concrete spraying layer is arranged on the inner surface of the roadway, a steel plate protective layer is laid on the surface of the concrete spraying layer, anchor rods which are driven into bedrock are distributed on the surface of an arch part of the roadway, and the tail end of each anchor rod is provided with a threaded part and penetrates out of the concrete spraying layer and the steel plate protective layer; the steel bar net covering the surface of the arch part of the tunnel is embedded in the concrete spraying layer of the arch part of the tunnel.
Furthermore, the steel plate protective layer is formed by splicing steel plates, semicircular convex parts are arranged on the edges of two sides of each steel plate, semicircular concave parts are arranged on the edges of the other two sides of each steel plate, and the semicircular convex parts and the semicircular concave parts of the two adjacent steel plates which are spliced are engaged together in a concave-convex mode.
Further, the steel plates of the steel plate protection layers of the tunnel arch part are fixed at the tail end of the anchor rod through nut locking, and the steel plates of the steel plate protection layers of the two side walls of the tunnel are fixedly connected onto the concrete spraying layer.
Further, the length of the anchor rod is 2m, and the diameter of the anchor rod is 18 mm; the mesh degree of the reinforcing mesh is 8cm by 8cm, and the diameter of the reinforcing steel bar of the reinforcing mesh is 6.5 mm; the thickness of the concrete spraying layer is 1cm, and the thickness of the steel plate protective layer is 1 cm.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model has the advantages of reasonable design and novel structure, and can replace the traditional concreting by the sprayed concrete, so that the concrete layer is thinner, the setting time is short, the construction period is short, the influence on the production is small, the time of normal production can not be delayed, and the rapid repair can be realized; concrete pouring is not carried out, materials such as templates and the like do not need to be erected and disassembled, construction workload is small, convenience and rapidness are realized, a large amount of labor force is not occupied, and the production cost of enterprises is reduced; the steel plate protective layer of assembled structure is used in the cooperation, and whole supporting strength is high, and the concrete spraying layer can not drop, and effectively protects the tunnel internal surface not to receive the damage of colliding with.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and related drawings.
Drawings
FIG. 1 is a schematic view of a rapid repair structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of a quick repair structure according to an embodiment of the present invention;
FIG. 3 is a schematic view illustrating the connection between two adjacent steel plates according to an embodiment of the present invention;
fig. 4 is a schematic view of the step (1) of the upper expanding process of the embodiment of the present invention;
FIG. 5 is a schematic diagram of the step (2) of the upper expanding process according to the embodiment of the present invention;
FIG. 6 is a sectional view of the tunnel after the wall expansion of the embodiment of the present invention;
FIG. 7 is a schematic view of the construction process step (1) of the embodiment of the present invention for rapid repair of a structure;
fig. 8 is a schematic view of the construction process step (3) of the rapid repair structure according to the embodiment of the present invention;
the numbering in the figures illustrates: the method comprises the following steps of 1-un-weathered surrounding rock, 2-weathered surrounding rock, 3-original roadway section, 4-roadway section after side expansion, 5-base drum, 6-blast hole, 7-semicircular convex part, 8-semicircular concave part, 9-blast eye mark, 10-anchor rod, 11-threaded part, 12-reinforcing mesh, 13-concrete spray layer, 14-steel plate protective layer, 15-nut, 16-dosage control hole and 17-roadway.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 1 to 8, a rapid repair structure of an original roadway comprises a roadway 17, wherein a concrete spraying layer 13 is arranged on the inner surface of the roadway 17, a steel plate protective layer 14 is laid on the surface of the concrete spraying layer 13, an anchor rod 10 which is driven into bedrock is distributed on the surface of an arch part of the roadway, and a thread part 11 is arranged at the tail end of the anchor rod 10 and penetrates out of the concrete spraying layer and the steel plate protective layer; a reinforcing mesh 12 covering the surface of the arch part of the roadway is embedded in the concrete spraying layer of the arch part of the roadway 17; the utility model has the advantages that the rapid repair structure uses the sprayed concrete to replace the traditional cast concrete, the concrete layer is thinner, the setting time is short, the influence on the production is very small, the time of normal production can not be delayed, and the rapid repair can be realized; concrete pouring is not carried out, materials such as templates and the like do not need to be erected and disassembled, construction workload is small, convenience and rapidness are realized, a large amount of labor force is not occupied, and the production cost of enterprises is reduced; the steel plate protective layer of assembled structure is used in the cooperation, and whole supporting strength is high, and the concrete spraying layer can not drop, and effectively protects the tunnel internal surface not to receive the damage of colliding with.
In the embodiment, the steel plate protective layer 14 is formed by splicing steel plates, wherein the edges of two sides of each steel plate are provided with semicircular convex parts 7, the edges of the other two sides of each steel plate are provided with semicircular concave parts 8, and the semicircular convex parts and the semicircular concave parts of two adjacent steel plates which are spliced are engaged together in a concave-convex manner; improve the wholeness of steel sheet protective layer through "unsmooth meshing" between the adjacent steel sheet, lay the steel sheet protective layer after complete, can play the effect of strutting through self intensity, can completely cut off tunnel surface bed rock again and concrete spray layer, avoid directly exposing in the air, prevent that rock morals and manners, concrete spray layer from droing, prevent that excavating equipment, haulage equipment from colliding with the group wall, play the effect in protection tunnel, can prolong the use and the service life in tunnel.
In this embodiment, the steel sheet of the steel sheet protective layer of tunnel hunch portion is fixed in the stock tail end through nut 15 lock attachs, and the steel sheet of the steel sheet protective layer of tunnel both sides wall passes through other modes fixed connection such as nail, screw on the concrete sprays the layer.
In the embodiment, the length of the anchor rod is 2m, and the diameter of the anchor rod is 18 mm; the mesh degree of the reinforcing mesh is 8cm by 8cm, and the diameter of the reinforcing steel bar of the reinforcing mesh is 6.5 mm; the thickness of the concrete spraying layer is 1cm, and the thickness of the steel plate protective layer is 1 cm.
The utility model discloses repair the work progress of structure fast:
(1) punching holes in the arch part of the roadway according to designed support parameters, and driving anchor rods into bedrocks; the anchor rods are approximately in a concentric radial shape, and the specific row spacing is determined according to the requirement of the support strength;
(2) fixing the reinforcing mesh on the anchor rod by using adhesive tapes, bands and the like, covering the arch part of the roadway and attaching the surface of the arch part of the roadway;
(3) spraying concrete on the inner surface of the roadway to form a concrete spraying layer by using a concrete spraying trolley or manual spraying and other modes, and spraying additives such as an accelerating agent, an early strength agent and the like for 6 hours to achieve the designed supporting strength; the concrete spraying layer completely covers the reinforcing mesh of the arch part of the roadway to form a reinforced concrete structure, as shown in fig. 3;
(4) after the concrete sprayed layer is coagulated, laying a steel plate on the surface of the concrete sprayed layer to form a steel plate protective layer, laying the steel plate protective layer from the side wall of one side of the roadway to the arch part of the roadway, and finally laying the steel plate protective layer to the side wall of the other side of the roadway; the steel plate of the tunnel arch part is locked by a nut on the thread part of the anchor rod; the two side wall steel plates are fixed on the surface of the concrete spraying layer by nails, screws and other modes, as shown in figure 1.
Because through many years capital construction period or many years use, tunnel surface rock morals and manners are serious, form the broken area of round (weathered country rock 2 promptly), under the multi-direction ground stress effect, the tunnel bottom plate produces the pucking 5, is consequently going on the utility model discloses before repairing the structure construction, need expand group's processing to the tunnel section. The concrete rib expanding process is as follows:
(1) according to the actual conditions of over-under excavation and unevenness on site, measuring the thickness of a broken zone, determining various parameters of blasting expanding and bottom cleaning, carrying out site calibration, and confirming and calibrating the profile of the roadway section subjected to expanding and bottom cleaning;
(2) expanding the tunnel through blasting and cleaning the bottom: firstly, drilling a plurality of dosage control holes 16 at a thick part of weathered surrounding rock, then drilling a circle of blasting holes 6 on the section outline of a designed roadway, wherein the hole interval is about 40cm, the dosage control holes are determined according to the size of a minimum resistance line, and the dosage control holes are uniformly distributed. The explosive quantity control hole aims at increasing explosive quantity at a thick part, the explosive quantity in the hole is relatively inconsistent, the explosive quantity is determined according to the thickness of a required expansion wall and the coupling superposition effect between blast holes, a smooth roadway section can be formed after blasting, the roadway profile is well formed, and uniform blasting hole marks 9 are left on the section;
(3) carrying out subsequent ventilation and slag tapping work of blasting;
(4) due to the heterogeneity of rock properties, the conditions of hardness, density, structural planes and the like of rock masses at all positions are inconsistent, and the local unevenness phenomenon, namely over-excavation and under-excavation, still exists after blasting; the underdigging part is subjected to secondary treatment in a mechanical crushing mode and the like; the super-excavation part is filled by later-stage sprayed concrete, a section profile after expanding the wall and cleaning the bottom is basically formed, weathered broken rocks on the surface of the original roadway are cleaned, and complete and hard bedrocks are exposed.
The method has the advantages that the slope is expanded and the bottom is cleared before the construction of the repair structure, the broken slope wall is removed, the whole falling of concrete is avoided, the supporting effect is improved, and the reduction of the original roadway section is avoided.
Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.
The utility model discloses if disclose or related to mutual fixed connection's spare part or structure, then, except that other has declared, fixed connection can understand: a detachable fixed connection (for example using a bolt or screw connection) can also be understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.
The utility model provides an arbitrary part both can be formed by a plurality of solitary component parts equipment, also can be for the solitary part that the integrated into one piece technology made out.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (4)
1. The utility model provides a quick repair structure in original tunnel which characterized in that: the anchor rod is characterized by comprising a roadway, wherein a concrete spraying layer is arranged on the inner surface of the roadway, a steel plate protective layer is laid on the surface of the concrete spraying layer, anchor rods which are driven into bedrock are distributed on the surface of an arch part of the roadway, and the tail end of each anchor rod is provided with a threaded part and penetrates out of the concrete spraying layer and the steel plate protective layer; the steel bar net covering the surface of the arch part of the tunnel is embedded in the concrete spraying layer of the arch part of the tunnel.
2. The rapid repair structure of an original roadway according to claim 1, characterized in that: the steel plate protective layer is formed by splicing steel plates, semicircular convex parts are arranged on the edges of two sides of each steel plate, semicircular concave parts are arranged on the edges of the other two sides of each steel plate, and the semicircular convex parts and the semicircular concave parts of the two adjacent steel plates which are spliced are engaged together in a concave-convex mode.
3. The structure of claim 2, wherein the structure comprises: the steel plate of the steel plate protective layer of the tunnel arch part is fixed at the tail end of the anchor rod through the nut lock, and the steel plates of the steel plate protective layers of the two side walls of the tunnel are fixedly connected on the concrete spraying layer.
4. The rapid repair structure of an original roadway according to claim 1, characterized in that: the length of the anchor rod is 2m, and the diameter of the anchor rod is 18 mm; the mesh degree of the reinforcing mesh is 8cm by 8cm, and the diameter of the reinforcing steel bar of the reinforcing mesh is 6.5 mm; the thickness of the concrete spraying layer is 1cm, and the thickness of the steel plate protective layer is 1 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220928808.6U CN217327344U (en) | 2022-04-21 | 2022-04-21 | Quick repair structure of original tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220928808.6U CN217327344U (en) | 2022-04-21 | 2022-04-21 | Quick repair structure of original tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217327344U true CN217327344U (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220928808.6U Active CN217327344U (en) | 2022-04-21 | 2022-04-21 | Quick repair structure of original tunnel |
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| Country | Link |
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| CN (1) | CN217327344U (en) |
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- 2022-04-21 CN CN202220928808.6U patent/CN217327344U/en active Active
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