CN212027799U - City portal tunnel lining - Google Patents
City portal tunnel lining Download PDFInfo
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- CN212027799U CN212027799U CN202020760954.3U CN202020760954U CN212027799U CN 212027799 U CN212027799 U CN 212027799U CN 202020760954 U CN202020760954 U CN 202020760954U CN 212027799 U CN212027799 U CN 212027799U
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Abstract
The utility model discloses an urban portal tunnel lining, which comprises a tunnel lining unit, wherein the tunnel lining unit comprises bottom block reinforcing mesh sheets, foot block reinforcing mesh sheets, side wall block reinforcing mesh sheets, shoulder block reinforcing mesh sheets and top sealing block reinforcing mesh sheets; the bottom block steel bar mesh is a straight steel bar mesh; the foot block reinforcing steel bar net piece comprises two straight reinforcing steel bar net piece parts which are vertical to each other; the side wall block steel bar net piece is a straight steel bar net piece; the shoulder reinforcing mesh comprises a straight reinforcing mesh part and an arc reinforcing mesh part; the top sealing block steel bar net piece is an arc-shaped steel bar net piece; the reinforcing mesh is a unit block structure formed by connecting annular stress reinforcing steel bars and structural reinforcing steel bars; the hoop end of the reinforcing mesh piece is provided with a connecting structure which can be connected with the adjacent reinforcing mesh piece, and the hoop end of the reinforcing mesh piece is the end of the reinforcing mesh piece in the length direction of the hoop stress reinforcing steel bars. Above-mentioned city portal tunnel lining, raise the efficiency reduces health hazard.
Description
Technical Field
The utility model relates to a cast-in-place concrete lining equipment technical field of tunnel, in particular to city portal tunnel lining cutting of shape.
Background
The tunnel is a hydraulic tunnel, the construction speed of lining of the tunnel is greatly influenced by the progress and safety of the engineering, and the lining construction speed is restricted by the binding of reinforcing mesh sheets in the tunnel. At present, steel mesh binding and welding of city portal tunnel lining are mostly carried out in a tunnel, and the binding and welding efficiency of the steel mesh is very low due to the influence of space and illumination. In addition, dust and smoke generated in the process of binding and welding a large number of steel bars are difficult to dissipate in the holes, and the health of field workers is seriously endangered.
Therefore, how to improve the efficiency and reduce the health hazard to field workers is a problem to be solved urgently by the technical personnel.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an urban cave shape tunnel lining cutting to raise the efficiency reduces the health hazard to the field work personnel. In order to achieve the above object, the utility model provides a following technical scheme:
a tunnel lining comprises a tunnel lining unit, wherein the tunnel lining unit comprises a plurality of reinforcing mesh sheets which can be connected along the circumferential direction of the inner wall of a tunnel;
the steel bar net pieces are of a unit block structure formed by connecting annular stress steel bars and construction steel bars, and the steel bar net pieces comprise bottom steel bar net pieces used for being arranged on the bottom surface of the tunnel, foot steel bar net pieces used for being arranged at an included angle of the bottom surface of the tunnel, side wall steel bar net pieces used for being arranged on the side surfaces of the tunnel, shoulder steel bar net pieces used for being arranged on the shoulder parts of the tunnel and top sealing steel bar net pieces used for being arranged on the top sealing of the tunnel; the bottom block steel bar mesh is a straight steel bar mesh; the foot block reinforcing steel bar mesh comprises two straight reinforcing steel bar mesh parts which are perpendicular to each other; the side wall block steel bar mesh is a straight steel bar mesh; the shoulder block reinforcing steel bar mesh comprises a straight reinforcing steel bar mesh part and an arc-shaped reinforcing steel bar mesh part; the top sealing block reinforcing mesh is an arc-shaped reinforcing mesh;
the circumferential end part of the reinforcing mesh piece is provided with a connecting structure which can be connected with the adjacent reinforcing mesh piece, and the circumferential end part of the reinforcing mesh piece is the end part of the reinforcing mesh piece in the length direction of the circumferential stress reinforcing steel bar.
Optionally, in the lining of the urban cave-shaped tunnel, the connecting structure is an extension reinforcing steel bar portion of the hoop stressed reinforcing steel bar extending out of the structural reinforcing steel bar.
Optionally, in the above lining of an urban cave-shaped tunnel, the length of the extension reinforcing steel bar part is an anchoring length.
Optionally, in the lining of the urban cave-shaped tunnel, in two adjacent steel mesh sheets, the connection structure of one steel mesh sheet is used for being lapped with the inner wall of the other steel mesh sheet, and the connection structure of the other steel mesh sheet is used for being lapped with the outer wall of the one steel mesh sheet.
Optionally, in the above-mentioned city portal tunnel lining, the number of the tunnel lining units is plural;
the end part of the structural steel bar is an outward extending steel bar part which extends out of the annular stress steel bar;
among two adjacent tunnel lining units, one tunnel lining unit stretch out the reinforcing bar portion for being used for with another tunnel lining unit is connected.
Optionally, in the lining of the urban cave-shaped tunnel, the structural steel bar is in a U-shaped structure, and the end of the opening of the structural steel bar is the overhanging steel bar part;
the hoop stressed steel bar is arranged on the outer side of the structural steel bar, and the overhanging steel bar part is bent towards the inside of the structural steel bar and stretches outwards.
Optionally, in the above-mentioned city portal tunnel lining, the length of the overhanging reinforcement portion is an anchoring length.
Optionally, in the lining of an urban cave-shaped tunnel, the engagement surface of the top-sealing block reinforcing mesh is an inclined surface which is inclined outward in a direction from the top sealing of the tunnel to the bottom surface thereof, and the engagement surface of the shoulder-block reinforcing mesh is an inclined surface which is inclined inward in a direction from the top sealing of the tunnel to the bottom surface thereof;
the engagement surface of the top sealing block reinforcing mesh is the end surface of the top sealing block reinforcing mesh facing the shoulder block reinforcing mesh, and the engagement surface of the shoulder block reinforcing mesh is the end surface of the shoulder block reinforcing mesh facing the top sealing block reinforcing mesh.
Optionally, in the lining of the urban cave-shaped tunnel, a gap between the joint surfaces of two adjacent steel mesh sheets is less than 200 mm.
Optionally, in the lining of the urban portal tunnel, the height of the tunnel is greater than 5m, and the bottom block reinforcing mesh and the side wall block reinforcing mesh both include a plurality of separate unit reinforcing meshes;
or the height of the tunnel is less than 5m, and the bottom block reinforcing mesh and the side wall block reinforcing mesh are both integral reinforcing meshes.
The utility model provides a city portal tunnel shape tunnel lining cutting forms the reinforcing bar net piece through with hoop atress reinforcing bar and tectonic reinforcing bar ligature. The annular end part of the reinforcing mesh piece is provided with a connecting structure which can be connected with the adjacent reinforcing mesh piece, the annular end part of the reinforcing mesh piece is the end part of the reinforcing mesh piece in the length direction of the annular stress reinforcing steel bar, and the annular end parts of the plurality of reinforcing mesh pieces are connected with the adjacent reinforcing mesh piece, so that the bottom reinforcing mesh piece, the foot reinforcing mesh piece, the side wall reinforcing mesh piece, the shoulder reinforcing mesh piece and the top sealing reinforcing mesh piece can be connected in the annular direction of the inner wall of the tunnel and form a tunnel lining unit. Therefore, a plurality of reinforcing mesh pieces can be processed outside the tunnel to form, and then the reinforcing mesh pieces are moved into the tunnel, the connection of two adjacent reinforcing mesh pieces is completed through the connecting structure arranged at the circumferential end part of the reinforcing mesh pieces, and the connecting structures of the plurality of reinforcing mesh pieces are sequentially connected to form a tunnel lining unit so as to complete the city portal tunnel lining. Through the arrangement, the processing of the reinforcing mesh is prevented from being carried out in the tunnel, the influence of the space and illumination in the tunnel on the operation of processing the reinforcing mesh is avoided, and the processing efficiency of lining of the urban portal tunnel is improved; moreover, dust and smoke generated in the processing process of the reinforcing mesh are prevented from remaining in the tunnel, and health hazards to field workers are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of an urban cave-shaped tunnel lining in an embodiment of the present invention;
FIG. 2 is a schematic sectional view taken along the line A-A in FIG. 1;
fig. 3 is a schematic structural view of a first step of assembling lining of an urban cave-shaped tunnel according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a second step of assembling lining of an urban cave-shaped tunnel according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a third step of assembling lining of an urban cave-shaped tunnel according to an embodiment of the present invention;
fig. 6 is the embodiment of the utility model provides an equipment city portal tunnel lining's fourth step structure sketch map.
Detailed Description
The utility model discloses a tunnel lining cutting to raise the efficiency, reduce the health hazard to the field work personnel.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides an urban portal tunnel lining, including a tunnel lining unit, where the tunnel lining unit includes a plurality of reinforcing mesh sheets that can be connected circumferentially along an inner wall of a tunnel, and the plurality of reinforcing mesh sheets include a bottom reinforcing mesh sheet 1 for being disposed on a bottom surface of the tunnel, a leg reinforcing mesh sheet 2 for being disposed at an included angle of the bottom surface of the tunnel, a side wall reinforcing mesh sheet 3 for being disposed on a side surface of the tunnel, a shoulder reinforcing mesh sheet 4 for being disposed on a shoulder of the tunnel, and a top-sealing reinforcing mesh sheet 5 for being disposed on a top seal of the tunnel; the bottom block steel bar mesh 1 is a straight steel bar mesh; the foot block reinforcing steel bar net piece 2 comprises two straight reinforcing steel bar net piece parts which are vertical to each other; the side wall block steel bar net 3 is a straight steel bar net; the shoulder reinforcing mesh 4 comprises a straight reinforcing mesh part and an arc reinforcing mesh part; the top sealing block reinforcing mesh 5 is an arc-shaped reinforcing mesh. The reinforcing mesh is a combined structure formed by connecting annular stress reinforcing steel bars 7 and structural reinforcing steel bars 6; the hoop end of the reinforcing mesh piece is provided with a connecting structure which can be connected with the adjacent reinforcing mesh piece, and the hoop end of the reinforcing mesh piece is the end of the reinforcing mesh piece in the length direction of the hoop stress reinforcing steel bars 7.
The embodiment of the utility model provides a city portal tunnel lining cutting forms the reinforcing bar net piece through the ligature with cyclic annular atress reinforcing bar 7 and construction reinforcing bar 6. Wherein, the hoop tip of reinforcing bar net piece has the connection structure that can be connected rather than adjacent reinforcing bar net piece, the hoop tip of reinforcing bar net piece is reinforcing bar net piece along the length direction's of hoop atress reinforcing bar 7 tip, the hoop tip of a plurality of reinforcing bar net pieces is connected rather than adjacent reinforcing bar net piece for bottom block reinforcing bar net piece 1, foot piece reinforcing bar net piece 2, side wall piece reinforcing bar net piece 3, shoulder piece reinforcing bar net piece 4 and top sealing piece reinforcing bar net piece 5 can be followed the inner wall hoop of tunnel and connected and form tunnel lining unit. Therefore, a plurality of reinforcing mesh pieces can be processed outside the tunnel to form, and then the reinforcing mesh pieces are moved into the tunnel, the connection of two adjacent reinforcing mesh pieces is completed through the connecting structure arranged at the circumferential end part of the reinforcing mesh pieces, and the connecting structures of the plurality of reinforcing mesh pieces are sequentially connected to form a tunnel lining unit so as to complete the city portal tunnel lining. Through the arrangement, the processing of the reinforcing mesh is prevented from being carried out in the tunnel, the influence of the space and illumination in the tunnel on the operation of processing the reinforcing mesh is avoided, and the processing efficiency of lining of the urban portal tunnel is improved; moreover, dust and smoke generated in the processing process of the reinforcing mesh are prevented from remaining in the tunnel, and health hazards to field workers are reduced.
It can be understood that the bottom block reinforcing mesh 1 is a straight reinforcing mesh, two circumferential end parts of the bottom block reinforcing mesh are respectively connected with the two foot block reinforcing mesh 2, and the bottom block reinforcing mesh 1 is connected with one straight reinforcing mesh part of the foot block reinforcing mesh 2. The side wall block reinforcing mesh 3 is a straight reinforcing mesh, and the other straight reinforcing mesh part of the foot block reinforcing mesh 2 is connected with the downward annular end part of the side wall block reinforcing mesh 3. The shoulder reinforcing mesh 4 is an L-shaped reinforcing mesh, and comprises a straight reinforcing mesh part and an arc reinforcing mesh part, and the upward annular end part of the side wall reinforcing mesh 3 is connected with the straight reinforcing mesh part of the shoulder reinforcing mesh 4. The top sealing block reinforcing mesh 5 is an arc-shaped reinforcing mesh, and the arc-shaped reinforcing mesh part of the shoulder block reinforcing mesh 4 is connected with the top sealing block reinforcing mesh 5.
The lining of the urban portal tunnel is a circular arch straight wall tunnel.
Wherein, the connection of the hoop stress steel bar 7 and the construction steel bar 6 can be formed by binding and welding. Because the reinforcing bar net piece is the integrated configuration who forms by the connection of hoop atress reinforcing bar 7 and constructional reinforcement 6, and the processing of reinforcing bar net piece can set up in the tunnel outside, avoids the produced dust and the smog of a large amount of reinforcement and welding process to stay inside the tunnel.
It can be understood that the hoop tip of reinforcing bar net piece has the connection structure that can be connected rather than adjacent reinforcing bar net piece, consequently, only need to remove reinforcing bar net piece to the inside back of tunnel, adopts connection structure to connect a plurality of reinforcing bar net pieces for tunnel lining unit.
The tunnel can be an urban door opening and can be a tunnel.
In this embodiment, the connection structure is an extension reinforcing steel bar portion extending out of the structural reinforcing steel bar 6 from the hoop stress reinforcing steel bar 7. Through the arrangement, the extension steel bar part of the hoop stress steel bar 7 extending out of the construction steel bar 6 can be used as a connecting structure only by adjusting the length of the hoop stress steel bar 7. In this embodiment, the quantity of hoop atress reinforcing bar 7 and constructional reinforcement 6 is a plurality of and hoop atress reinforcing bar 7 and the setting of constructional reinforcement 6 mutually perpendicular, and the outside extension reinforcing bar portion that stretches out constructional reinforcement 6 of hoop atress reinforcing bar 7 is the position that stretches out whole constructional reinforcement 6 in the reinforcing bar net piece outside hoop atress reinforcing bar 7.
Wherein, the extension reinforcing steel bar part of one reinforcing steel bar net piece can be connected with the annular stress reinforcing steel bar 7 or the structural reinforcing steel bar 6 of the other reinforcing steel bar net piece by binding and welding; the extension reinforcing steel bar part of one reinforcing steel bar net piece can be only lapped with another reinforcing steel bar net piece and anchored. The reinforcing mesh pieces can be directly fixed on the rock wall of the tunnel, and a plurality of reinforcing mesh pieces can be connected to form a tunnel lining unit and then fixed on the rock wall of the tunnel, so that specific limitation is not required.
Also can set up connection structure into buckle connecting portion, only need satisfy construction needs (like intensity demand etc.) can.
In order to ensure the requirements of lap joint and anchoring of the annular stress steel bar 7, the length of the extension steel bar part is one anchoring length. The length of the extension reinforcing steel bar part can be set to other sizes, which are not repeated one by one and are all within the protection range.
In order to meet the lap joint requirement of the inner side and the outer side of two adjacent reinforcing mesh sheets, in the two adjacent reinforcing mesh sheets, the connecting structure of one reinforcing mesh sheet is used for being lapped with the inner wall of the other reinforcing mesh sheet, and the connecting structure of the other reinforcing mesh sheet is used for being lapped with the outer wall of the reinforcing mesh sheet. Namely, the connecting structures of two adjacent reinforcing mesh sheets are arranged in a staggered mode inside and outside. Wherein, the inboard direction is the one side of reinforcing bar net piece towards the center of tunnel, and the outside direction is the one side of reinforcing bar net piece dorsad tunnel's center.
The number of the tunnel lining units is multiple for the convenience of transportation; the end part of the construction steel bar 6 is an outward extending steel bar part 8 which extends out of the annular stress steel bar 7. In this embodiment, the quantity of hoop atress reinforcing bar 7 and constructional reinforcement 6 is a plurality of and hoop atress reinforcing bar 7 and the setting of 6 mutually perpendicular of constructional reinforcement, and 6 overhanging reinforcing bar portions 8 that stretch out hoop atress reinforcing bar 7 of constructional reinforcement are the position of 6 outer whole hoop atress reinforcing bars 7 that stretch out in the reinforcing bar net piece of constructional reinforcement. Among two adjacent tunnel lining units, the overhanging reinforcing steel bar portion 8 of a tunnel lining unit is for being used for being connected with another tunnel lining unit. Therefore, the constructional steel bars 6 play a role in connecting the annular stress steel bars 7 and the steel mesh sheets on the two adjacent tunnel lining units.
As shown in fig. 2, the construction steel bar 6 is a U-shaped structure, and the open end thereof is an overhanging steel bar portion 8; the hoop stress steel bar 7 is arranged on the outer side of the construction steel bar 6, and the overhanging steel bar part 8 is bent towards the inside of the construction steel bar 6 and stretches outwards. That is, overhanging reinforcing bar portion 8 is parallel to each other and is the ladder setting with the reinforcing bar body of construction reinforcing bar 6 for two overhanging reinforcing bar portions 8 that the opening tip of a tunnel lining unit construction reinforcing bar 6 set up can link up inside the construction reinforcing bar 6 of another tunnel lining unit, make things convenient for two adjacent tunnel lining unit anchors.
It can be understood that fig. 2 is not limited to the cross-sectional view of the side wall block reinforcing mesh 3, and may be cross-sectional views of the bottom block reinforcing mesh 1, the leg block reinforcing mesh 2, the side wall block reinforcing mesh 3, the shoulder block reinforcing mesh 4, and the capping block reinforcing mesh 5.
In this embodiment, the length of the overhanging reinforcement portion 8 is an anchoring length.
As shown in fig. 1, the mesh for reinforcing bars includes: a back mass reinforcing bar net piece 1 for setting up the bottom surface in the tunnel for the foot piece reinforcing bar net piece 2 of setting at the bottom surface contained angle in the tunnel, a side wall piece reinforcing bar net piece 3 for setting up the side in the tunnel, a shoulder piece reinforcing bar net piece 4 for setting up the shoulder in the tunnel, a capping piece reinforcing bar net piece 5 for setting up the capping in the tunnel. The bottom block reinforcing mesh piece 1 can be connected with the part, located on the bottom surface of the tunnel, of the foot block reinforcing mesh piece 2, and the included angle of the bottom surface of the tunnel is the included angle formed between the bottom surface of the tunnel and the side surface of the tunnel; one end of the side wall block reinforcing mesh 3 can be connected with the part of the foot block reinforcing mesh 2 positioned on the side surface of the tunnel; one end of the shoulder reinforcing mesh 4 can be connected with the other end of the side wall reinforcing mesh 3, and the shoulder of the tunnel is a transition part formed between the top cover of the tunnel and the side surface of the tunnel; the top sealing block reinforcing mesh 5 is connected with the other end of the shoulder block reinforcing mesh 4. Through the arrangement, the transportation is facilitated. And the connecting part of the reinforcing mesh piece is required to avoid the part with larger stress in the tunnel.
In order to facilitate the installation from bottom to top, the smooth installation of the top sealing block reinforcing mesh 5 is ensured. The connection surface of the top sealing block reinforcing mesh 5 is an inclined surface which is inclined outwards along the direction from the top sealing of the tunnel to the bottom surface of the tunnel, and the connection surface of the shoulder block reinforcing mesh 4 is an inclined surface which is inclined inwards along the direction from the top sealing of the tunnel to the bottom surface of the tunnel; the engagement surface of the top sealing block reinforcing mesh 5 is the end surface of the top sealing block reinforcing mesh 5 facing the shoulder block reinforcing mesh 4, and the engagement surface of the shoulder block reinforcing mesh 4 is the end surface of the shoulder block reinforcing mesh 4 facing the top sealing block reinforcing mesh 5. Wherein, the connection structure (the extension reinforcing bar part) of the capping piece reinforcing bar net piece 5 is positioned at the inner wall side, thereby further ensuring the smooth installation of the capping piece reinforcing bar net piece 5.
In order to facilitate installation, the gap between the joint surfaces of two adjacent reinforcing mesh sheets is less than 200 mm.
In the first embodiment, the height of the tunnel is greater than 5m, and the bottom block reinforcing mesh piece 1 and the side wall block reinforcing mesh piece 3 both comprise a plurality of independent unit reinforcing mesh pieces. Through the setting, when the height of tunnel is greater than 5m, the size of the required city portal tunnel lining is also bigger, and for the convenience of transportation, the bottom block reinforcing steel mesh sheet 1 and the side wall block reinforcing steel mesh sheet 3 all comprise a plurality of independent unit reinforcing steel mesh sheets. Namely, the bottom block reinforcing mesh 1 comprises a plurality of independent unit reinforcing meshes, and the plurality of independent unit reinforcing meshes are installed in the tunnel to form the bottom block reinforcing mesh 1; the side wall block reinforcing mesh 3 comprises a plurality of independent unit reinforcing mesh pieces, and the plurality of independent unit reinforcing mesh pieces are installed inside the tunnel to form the side wall block reinforcing mesh piece 3.
In the second embodiment, the height of the tunnel is less than 5m, and the bottom block reinforcing mesh sheet 1 and the side wall block reinforcing mesh sheet 3 are both integral reinforcing mesh sheets.
The utility model also provides a construction method of city portal tunnel shape tunnel lining cutting, use as above-mentioned any kind of city portal tunnel shape tunnel lining cutting, including the step:
s1: designing the length of a tunnel lining unit and the distribution positions and the number of a plurality of reinforcing mesh pieces in the tunnel lining unit according to the tunnel excavation size, wherein the length of the tunnel lining unit is the size of a tunnel lining along the axial direction of the tunnel;
the reinforcing steel bar net block is convenient to transport and install quickly, and the optimization of the whole stress structure is guaranteed, so that the block design is realized. According to the tunnel excavation size, design into the tunnel lining along 2 ~ 4 meters of tunnel axial to be a tunnel lining cutting unit with the tunnel lining cutting, when every tunnel lining cutting unit arrangement of reinforcement design, all cut apart into bottom block reinforcing bar net piece 1, foot piece reinforcing bar net piece 2, side wall piece reinforcing bar net piece 3, shoulder piece reinforcing bar net piece 4 and a piece reinforcing bar net piece 5 of capping along its hoop. The bottom block reinforcing steel bar mesh 1, the foot block reinforcing steel bar mesh 2, the side wall block reinforcing steel bar mesh 3, the shoulder block reinforcing steel bar mesh 4 and the top sealing block reinforcing steel bar mesh 5 are of a block structure, and the connecting positions of two adjacent blocks are required to avoid the position with large stress.
S2: processing a steel bar net outside the tunnel, wherein the steel bar net is formed by connecting annular stress steel bars 7 and structural steel bars 6;
wherein, the connection of the hoop stress steel bar 7 and the construction steel bar 6 can comprise binding and welding. Wherein the banding process should be within deformation tolerances during transport and installation.
S3: moving the reinforcing mesh into the tunnel, assembling and fixing;
wherein, a plurality of reinforcing bar net pieces are assembled according to the installation order to be fixed in on the cliff of tunnel.
S4: erecting a template, plugging and pouring concrete.
Wherein, the plugging is performed on two sides for the first time, and then, the plugging is performed on one side. The construction method for installing the plurality of tunnel linings into the tunnel further comprises the step S5, and the step S2-the step 4 are repeated until the whole tunnel lining is completed.
The embodiment of the utility model provides a tunnel lining's construction method has the same technological effect as above-mentioned tunnel lining, does not explain here in detail.
Further, in step S3, the mesh reinforcement sheet is attached from bottom to top. That is, as shown in fig. 3 to 6, the bottom block reinforcing mesh 1, the leg block reinforcing mesh 2, the side wall block reinforcing mesh 3, the shoulder block reinforcing mesh 4, and the top sealing block reinforcing mesh 5 are assembled in this order and fixed to the rock wall.
In order to facilitate installation, in step S3, the gap between the joint surfaces of two adjacent reinforcing mesh sheets is less than 200 mm.
In the step S1, when the height of the tunnel is more than 5m, the bottom block reinforcing steel mesh sheets 1 and the side wall block reinforcing steel mesh sheets 3 both comprise a plurality of independent unit reinforcing steel mesh sheets; when the height of the tunnel is less than 5m, the bottom block reinforcing mesh pieces 1 and the side wall block reinforcing mesh pieces 3 are all integrated reinforcing mesh pieces. Through the setting, when the height of tunnel is greater than 5m, the size of the required tunnel lining is also bigger, and for the convenience of transportation, bottom block reinforcing steel bar net piece 1 and side wall block reinforcing steel bar net piece 3 all include a plurality of solitary unit reinforcing steel bar net pieces. Namely, the bottom block reinforcing mesh 1 comprises a plurality of independent unit reinforcing meshes, and the plurality of independent unit reinforcing meshes are installed in the tunnel to form the bottom block reinforcing mesh 1; the side wall block reinforcing mesh 3 comprises a plurality of independent unit reinforcing mesh pieces, and the plurality of independent unit reinforcing mesh pieces are installed inside the tunnel to form the side wall block reinforcing mesh piece 3.
In order to facilitate transportation, in the step S1, the length of the reinforcing mesh is 2 m-4 m, and the length of the reinforcing mesh is the size of the tunnel lining along the axial direction of the tunnel.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An urban portal tunnel lining is characterized by comprising a tunnel lining unit, wherein the tunnel lining unit comprises a plurality of reinforcing mesh sheets which can be connected along the circumferential direction of the inner wall of the tunnel, the plurality of reinforcing mesh sheets comprise bottom reinforcing mesh sheets (1) arranged on the bottom surface of the tunnel, foot reinforcing mesh sheets (2) arranged at the included angle of the bottom surface of the tunnel, side wall reinforcing mesh sheets (3) arranged on the side surfaces of the tunnel, shoulder reinforcing mesh sheets (4) arranged on the shoulder parts of the tunnel and top sealing reinforcing mesh sheets (5) arranged on the top sealing of the tunnel; the bottom block steel bar mesh (1) is a straight steel bar mesh; the foot block steel bar net piece (2) comprises two straight steel bar net piece parts which are vertical to each other; the side wall block steel bar net piece (3) is a straight steel bar net piece; the shoulder block reinforcing steel bar mesh (4) comprises a straight reinforcing steel bar mesh part and an arc-shaped reinforcing steel bar mesh part; the top sealing block reinforcing mesh (5) is an arc-shaped reinforcing mesh;
the reinforcing mesh is a unit block structure formed by connecting annular stress reinforcing steel bars (7) and structural reinforcing steel bars (6);
the circumferential end part of the reinforcing mesh piece is provided with a connecting structure which can be connected with the adjacent reinforcing mesh piece, and the circumferential end part of the reinforcing mesh piece is the end part of the reinforcing mesh piece in the length direction of the circumferential stress reinforcing steel bar (7).
2. An urban cave tunnel lining according to claim 1, wherein the connecting structure is an extension reinforcing bar portion of the hoop stressed reinforcing bar (7) extending out of the construction reinforcing bar (6).
3. The urban cave tunnel lining of claim 2 wherein the length of said outwardly extending rebar portion is an anchoring length.
4. The lining of an urban portal tunnel according to claim 1, wherein said connecting structure of one of said two adjacent rebar mesh pieces is adapted to overlap an inner wall of the other rebar mesh piece, and said connecting structure of the other rebar mesh piece is adapted to overlap an outer wall of the one rebar mesh piece.
5. The urban cave tunnel lining of claim 1, wherein the number of tunnel lining units is plural;
the end part of the structural steel bar (6) is an outward extending steel bar part (8) which extends out of the annular stress steel bar (7);
among two adjacent tunnel lining units, the overhanging reinforcement portion (8) of one tunnel lining unit is used for being connected with the other tunnel lining unit.
6. An urban cave tunnel lining as claimed in claim 5, wherein said construction rebar (6) is of "U" shaped configuration with the open ends of said overhanging rebar portions (8);
the annular stressed steel bars (7) are arranged on the outer side of the constructional steel bars (6), and the overhanging steel bar parts (8) are bent towards the inside of the constructional steel bars (6) and are overhanging.
7. An urban cave tunnel lining according to claim 5, wherein the length of the overhanging reinforcement portion (8) is an anchoring length.
8. An urban cave tunnel lining according to any one of claims 1 to 7, wherein the engagement surface of the top-blocking reinforcing mesh (5) is an inclined surface that is inclined outward in the direction from the top-blocking surface of the tunnel to the bottom surface thereof, and the engagement surface of the shoulder-blocking reinforcing mesh (4) is an inclined surface that is inclined inward in the direction from the top-blocking surface of the tunnel to the bottom surface thereof;
the engagement surface of the top sealing block reinforcing mesh (5) is the end surface of the top sealing block reinforcing mesh (5) facing the shoulder block reinforcing mesh (4), and the engagement surface of the shoulder block reinforcing mesh (4) is the end surface of the shoulder block reinforcing mesh (4) facing the top sealing block reinforcing mesh (5).
9. An urban cave tunnel lining according to claim 1 wherein the spacing between the abutting faces of two adjacent reinforcing mesh sheets is less than 200 mm.
10. The lining of an urban portal tunnel according to claim 1, wherein the tunnel has a height greater than 5m, the bottom block rebar mesh (1) and the side wall block rebar mesh (3) each comprising a plurality of individual unit rebar meshes;
or the height of the tunnel is less than 5m, and the bottom block reinforcing mesh (1) and the side wall block reinforcing mesh (3) are both integral reinforcing meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020760954.3U CN212027799U (en) | 2020-05-09 | 2020-05-09 | City portal tunnel lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020760954.3U CN212027799U (en) | 2020-05-09 | 2020-05-09 | City portal tunnel lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212027799U true CN212027799U (en) | 2020-11-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020760954.3U Active CN212027799U (en) | 2020-05-09 | 2020-05-09 | City portal tunnel lining |
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| Country | Link |
|---|---|
| CN (1) | CN212027799U (en) |
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2020
- 2020-05-09 CN CN202020760954.3U patent/CN212027799U/en active Active
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