CN212027800U - Assembled lining of tunnel in shape of city portal - Google Patents
Assembled lining of tunnel in shape of city portal Download PDFInfo
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- CN212027800U CN212027800U CN202020761046.6U CN202020761046U CN212027800U CN 212027800 U CN212027800 U CN 212027800U CN 202020761046 U CN202020761046 U CN 202020761046U CN 212027800 U CN212027800 U CN 212027800U
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- 239000011150 reinforced concrete Substances 0.000 claims abstract description 19
- 210000001503 joint Anatomy 0.000 claims description 61
- 238000005452 bending Methods 0.000 claims description 2
- 230000002146 bilateral effect Effects 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 21
- 238000010276 construction Methods 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 10
- 230000003014 reinforcing effect Effects 0.000 abstract description 7
- 238000003466 welding Methods 0.000 abstract description 6
- 230000006978 adaptation Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 239000004567 concrete Substances 0.000 description 4
- 239000011440 grout Substances 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
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Abstract
The utility model relates to an assembled lining cutting of city portal tunnel, including at least one shape with the lining cutting unit of city portal tunnel shape tunnel adaptation, and the lining cutting unit is formed by the assembly of polylith prefabricated reinforced concrete section of jurisdiction. This fabricated lining of city portal tunnel adopts the prefabricated reinforced concrete section of jurisdiction outside the hole, then carries out the mode formation of assembling in the hole again, need not to carry out lashing and the welding of reinforcing bar net piece in the hole, and the assembly process is simple high-efficient, and this not only can effectively improve the efficiency of construction, but also has effectively reduced the influence that causes constructor's health in the work progress.
Description
Technical Field
The utility model relates to a hydraulic engineering construction technical field, in particular to city portal tunnel assembled lining cutting.
Background
An urban portal tunnel is a common type in hydraulic tunnels. The construction speed of tunnel lining is great to engineering progress and safe influence, and lining is cast-in-place formation usually in the present hole, and concrete step is: at first near the position ligature reinforcing bar net piece of tunnel inner wall, then remove predetermined position with the steel mould platform truck in order to support the reinforcing bar net piece, and then pour the concrete to reinforcing bar net piece position, remove the steel mould platform truck after waiting the concrete to reach form removal intensity and just can carry out next section and pour.
The most important factor for restricting the construction speed of the lining is the binding of the steel mesh sheets in the tunnel, at present, the binding and welding of the steel mesh sheets for lining the tunnel are both carried out in the tunnel, and the binding efficiency of the steel mesh sheets is extremely low due to the narrow space in the tunnel and the limited construction working area; welding is needed in the binding process of the reinforcing mesh, and smoke, dust and harmful gas generated by welding are slowly dispersed in the tunnel, so that the health of field workers can be seriously harmed; in addition, the steel mould trolley can carry out the next section of pouring after the concrete reaches the form removal strength, and the utilization rate of the template is lower.
Therefore, how to effectively improve the construction efficiency of tunnel lining and reduce the influence on the health of constructors is a technical problem which needs to be solved by the technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a city portal tunnel assembled lining cutting to can effectively improve tunnel lining cutting's efficiency of construction and reduce the influence healthy to constructor in the work progress.
In order to achieve the above object, the utility model provides an assembled lining cutting of city portal tunnel, including at least one shape with the lining cutting unit of city portal tunnel shape tunnel adaptation, and the lining cutting unit is formed by the assembly of polylith prefabricated reinforced concrete section of jurisdiction.
Preferably, the prefabricated reinforced concrete segment at least comprises:
the bottom block is used for being arranged at the bottom of the urban portal tunnel;
the side wall blocks are symmetrically assembled on the left side and the right side of the bottom block;
and the left side and the right side of the top block are respectively assembled at the top ends of the two side wall blocks.
Preferably, the side wall block comprises a side wall block body and a foot block, the foot block comprises a bottom block connecting piece and a lower end side wall connecting piece vertical to the bottom block connecting piece, wherein,
the foot blocks are located at right-angle bends formed by the bottoms of the urban portal tunnel and the side walls, the bottom block connecting pieces are in assembly connection with the bottom blocks, and the lower end side wall connecting pieces are in assembly connection with the lower ends of the side wall block bodies.
Preferably, the top block comprises a top block body and shoulder blocks symmetrically distributed at two ends of the top block body, the shoulder blocks comprise upper end side wall connecting sheets and top block connecting sheets connected with the upper end side wall connecting sheets, wherein,
the shoulder block is positioned at a bending part formed by the side wall and the top of the urban portal tunnel, the upper end side wall connecting piece is connected with the upper end of the side wall block body in an assembling manner, and the top block connecting piece is connected with the top block body in an assembling manner.
Preferably, the butt joint position of the bottom block and the bottom block connecting sheet, the butt joint position of the side wall block body and the lower end side wall connecting sheet, the butt joint position of the side wall block body and the upper end side wall connecting sheet and the butt joint position of the top block body and the top block connecting sheet all form an inclined butt joint, and the two parts forming the inclined butt joint are all connected through bolts perpendicular to the inclined butt joint.
Preferably, the butt joint position of the bottom block and the bottom block connecting sheet, the butt joint position of the side wall block body and the upper end side wall connecting sheet and the butt joint position of the top block body and the top block connecting sheet form inclined butt joints, and the two parts forming the inclined butt joints are assembled and connected through bolts perpendicular to the inclined butt joints; the butt joint position of the side wall block body and the lower end side wall connecting sheet forms a horizontal butt joint seam, and two components forming the horizontal butt joint seam are assembled and connected through a plug connector.
Preferably, the inclined butt seam forms an angle of 45 ° with the horizontal plane.
Preferably, the ejector block body and the left and right ejector block connecting pieces form two bilaterally symmetrical inclined butt joints, and the distance between the bottom ends of the two inclined butt joints is smaller than that between the top ends of the two inclined butt joints, so that the ejector block body is supported by the ejector block connecting pieces after being inserted into the space between the two ejector block connecting pieces.
Preferably, the bolt perpendicular to the inclined butt joint penetrates through the inner side surface of the lining unit, and a sunk groove for accommodating the head of the bolt is formed in the inner side surface of the lining unit.
According to the technical scheme, the lining of the urban cave-shaped tunnel disclosed by the utility model comprises one or more lining units, and each lining unit is formed by assembling a plurality of prefabricated reinforced concrete segments;
according to the shape of city portal tunnel, divide into one or more lining cutting unit with whole lining cutting branch in the axial of city portal tunnel, then cut apart into the polylith section of jurisdiction with each lining cutting unit and prefabricate, the prefabrication process is carried out at the outside reinforced concrete segment processing factory of tunnel usually, accomplish prefabricated polylith reinforced concrete segment and can form the lining cutting unit after the assembly in city portal tunnel, then the construction of city portal tunnel is accomplished in the rethread grout.
It can be seen that the fabricated lining of the urban portal tunnel disclosed by the scheme is formed by prefabricating reinforced concrete segments outside the tunnel and then assembling in the tunnel, binding and welding of reinforcing mesh pieces are not required to be carried out in the tunnel, the assembling process is simple and efficient, the construction efficiency can be effectively improved, and the influence on the health of constructors in the construction process is effectively reduced.
Drawings
FIG. 1 is a schematic front view of an assembled lining unit as disclosed in an embodiment of the present invention;
FIG. 2 is a schematic view of the assembly of the bottom block and the foot block;
FIG. 3 is a schematic view of the assembly of the side wall block body and the foot block;
FIG. 4 is a schematic view of the assembly of the shoulder block and the body of the side wall block;
fig. 5 is an assembly schematic view of the top block body and the shoulder block.
Wherein, 1 is the bottom piece, 2 is the foot piece, 3 is the side wall piece body, 4 is the shoulder piece, and 5 is the kicking block body.
Detailed Description
The core of the utility model is to provide an urban door hole shape tunnel assembled lining cutting to can effectively improve tunnel lining cutting's efficiency of construction and reduce the influence healthy to constructor in the work progress.
Referring to fig. 1 to 5, in an embodiment of the fabricated lining of an urban cave-shaped tunnel, the lining comprises at least one lining unit which is shaped to fit the urban cave-shaped tunnel, and the lining unit is fabricated by assembling a plurality of prefabricated reinforced concrete segments.
Before the lining is actually prefabricated, the lining is designed into a lining unit 2-4 m along the axial direction of the urban portal tunnel according to the design and excavation size of the urban portal tunnel and the convenience of manufacturing and transportation, for example, when the axial length of the urban portal tunnel is 2-4 m, only one lining unit can be designed, when the axial length of the urban portal tunnel is greater than 4 m, a plurality of lining units are required to be arranged, and the whole lining is formed by sequentially arranging the lining units in the axial direction of the urban portal tunnel.
As can be seen from the above embodiments, the lining of the tunnel of the present invention includes one or more lining units, each of which is formed by assembling a plurality of prefabricated reinforced concrete segments;
according to the shape of city portal tunnel, divide into one or more lining cutting unit with whole lining cutting branch in city portal tunnel's axial, then cut apart into the polylith section of jurisdiction with each lining cutting unit and prefabricate, the prefabrication process is carried out at the outside reinforced concrete section of jurisdiction processing factory of tunnel usually, accomplishes prefabricated polylith reinforced concrete section of jurisdiction and can form the lining cutting unit after assembling in city portal tunnel, then grout again and accomplish the construction of city portal tunnel.
It can be seen that the fabricated lining of the urban portal tunnel disclosed by the embodiment is formed by prefabricating reinforced concrete segments outside the tunnel and then assembling in the tunnel, binding and welding of reinforcing mesh sheets are not required to be carried out in the tunnel, the assembling process is simple and efficient, the construction efficiency can be effectively improved, and the influence on the health of constructors in the construction process is effectively reduced.
The quantity, the shape and the position of the precast concrete segment forming each lining unit need to be designed according to the basic requirements of convenient transportation and quick installation of the urban portal tunnel and are combined with the stress characteristics of the urban portal tunnel, for example, in some embodiments, the precast concrete segment at least comprises a bottom block 1, side wall blocks and a top block, the bottom block 1 is used for being arranged at the bottom of the urban portal tunnel and is used for forming the ground in the urban portal tunnel, the side wall blocks comprise two side wall blocks, the two side wall blocks are symmetrically assembled on the left side and the right side of the bottom block 1 respectively, the side wall blocks are used for forming the side walls of the urban portal tunnel, the shape of the top block is matched with the shape of the top of the urban portal tunnel, the left side and the right side of the top block are assembled on the top ends of the two side wall blocks respectively, and the top block is used for forming the top surface of the urban portal tunnel.
In another embodiment, when the height of the tunnel is not more than 5m, the following steps can be performed: the side wall block is further divided into a side wall block body 3 and a foot block 2, the top block is further divided into a top block body 5 and a shoulder block 4, the foot block 2 is L-shaped, as shown in figures 1 to 5, the foot block 2 comprises a bottom block connecting piece and a lower end side wall connecting piece perpendicular to the bottom block connecting piece, the foot block 2 is positioned at a right-angle bend formed by the bottom of the urban cave-shaped tunnel and the side wall, the bottom block connecting piece is assembled and connected with the bottom block 1, and the lower end side wall connecting piece is assembled and connected with the lower end of the side wall block body 3;
The assembly sequence of the lining element can be carried out by referring to fig. 2 to 5, wherein the assembly of the bottom block 1 is carried out after the foot block 2 is placed, then the assembly of the side wall block body 3 is carried out, further the assembly of the shoulder block 4 is carried out, and finally the assembly of the top block body 5 is carried out.
In one embodiment, the butt joint position of the bottom block 1 and the bottom block connecting piece, the butt joint position of the side wall block body 3 and the lower end side wall connecting piece, the butt joint position of the side wall block body 3 and the upper end side wall connecting piece, and the butt joint position of the top block body 5 and the top block connecting piece all form an inclined butt joint, and the two components forming the inclined butt joint are further assembled and connected through a bolt perpendicular to the inclined butt joint, referring to fig. 5, the top block body 5 and the left and right top block connecting pieces form two bilaterally symmetrical inclined butt joints, and the distance between the bottom ends of the two inclined butt joints is smaller than the distance between the top ends, so that the top block body 5 is supported by the top block connecting piece after being inserted into the space between the two top block connecting pieces, that is, the top block body 5 can be finally inserted into the space between the two top block connecting pieces along the axial direction, and can be kept stable under the supporting effect, so as to facilitate the installation of the bolt between the top block body 5 and the top block connecting sheet.
It will be appreciated by those skilled in the art that a plurality of such bolts may be provided in any one of the oblique pairs of seams along the axial direction of the tunnel to maintain installation reliability.
In another embodiment, the butt joint position of the bottom block 1 and the bottom block connecting sheet, the butt joint position of the side wall block body 3 and the upper end side wall connecting sheet and the butt joint position of the top block body 5 and the top block connecting sheet all form inclined butt joints, and the two parts forming the inclined butt joints are assembled and connected through bolts perpendicular to the inclined butt joints; the butt joint position of side wall piece body 3 and lower extreme side wall connection piece forms horizontal butt joint seam, and two parts that just form horizontal butt joint seam pass through plug connector assembly connection.
Referring to fig. 1 to 5, a horizontal butt joint is formed at a butt joint position of the side wall block body 3 and the lower end side wall connecting piece to ensure stress stability and prevent the prefabricated reinforced concrete segment above the side wall block body 3 from slipping, in order to realize butt joint between the side wall block body 3 and the lower end side wall connecting piece, an insert rod should be prefabricated or installed on one of the side wall block body 3 and the foot block 2, and a slot adapted to the insert rod should be prefabricated or installed on the other one to realize insertion assembly between the side wall block body 3 and the foot block.
Certainly, if the height of city portal tunnel is greater than 5 meters, can further carry out the split to bottom block 1 and side wall piece body 3 to convenient prefabrication, transportation and installation.
The purpose of the oblique butt seam is to facilitate bolt installation, so the angles of any two oblique butt seams in the above embodiments may be equal or different, and in a preferred embodiment, the oblique angle of the oblique butt seam is 45 °.
Referring to fig. 1, a bolt perpendicular to the inclined butt joint penetrates through the inner side of the lining unit, and a countersunk groove for receiving the head of the bolt is further provided on the inner side of the lining unit.
It should be noted that, in this document, the axial direction of the urban portal tunnel is taken as the front-back direction, and therefore, the side wall of the urban portal tunnel is taken as the left-right direction.
The utility model discloses a disclosed city portal tunnel lining construction method adopts the disclosed city portal tunnel lining in the above-mentioned arbitrary embodiment, including the step:
1) assembling prefabricated reinforced concrete segments inside the urban portal tunnel to form a lining unit which is matched with the urban portal tunnel in shape and axially covers the urban portal tunnel, and reserving grouting gaps between the top and the side of the lining unit and the inner wall of the urban portal tunnel; or, assembling prefabricated reinforced concrete segments inside the urban portal tunnel to form a plurality of lining units matched with the urban portal tunnel in shape, splicing the lining units in the axial direction to axially cover the urban portal tunnel, reserving grouting gaps between the top and the side surfaces of the lining units and the inner wall of the urban portal tunnel, and connecting the lining units through connecting pieces or plug connectors, or not connecting the lining units;
2) and pouring slurry into the grouting gaps to finish the construction of lining the urban portal tunnel.
The preferable pea gravel hydraulic filling grouting that adopts during the thick liquids pours into, and the grout clearance is between 90 ~ 110mm, and is the preferred 100mm to guarantee the atress homogeneity of lining cutting and city portal tunnel shape tunnel inner wall.
In the lining construction method of the urban cave-shaped tunnel in the embodiment, the urban cave-shaped tunnel is lined, and grouting gaps are reserved between the top and the side of a lining unit formed by assembling prefabricated reinforced concrete segments in the urban cave and the inner wall of the tunnel; and then grouting slurry in the grouting clearance to finish the construction of lining of the urban portal tunnel, thus the construction method is simple, convenient and efficient, can effectively reduce the influence on the health of constructors in the construction process, and has great popularization and application values.
It is right above the utility model provides an urban door hole shape tunnel assembled lining cutting has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (9)
1. The fabricated lining of the urban portal tunnel is characterized by comprising at least one lining unit which is matched with the urban portal tunnel in shape, wherein the lining unit is formed by assembling a plurality of prefabricated reinforced concrete segments.
2. The fabricated lining of an urban cave-shaped tunnel according to claim 1, wherein the prefabricated reinforced concrete segment at least comprises:
the bottom block (1) is used for being arranged at the bottom of the urban portal tunnel;
the side wall blocks are symmetrically assembled on the left side and the right side of the bottom block (1);
and the left side and the right side of the top block are respectively assembled at the top ends of the two side wall blocks.
3. The fabricated lining of an urban cave-shaped tunnel according to claim 2, wherein the side wall block comprises a side wall block body (3) and a foot block (2), the foot block (2) comprises a bottom block connecting piece and a lower end side wall connecting piece perpendicular to the bottom block connecting piece, wherein,
the foot blocks (2) are located at right-angle bends formed by the bottoms of the urban portal tunnel and the side walls, the bottom block connecting pieces are in assembly connection with the bottom blocks (1), and the lower end side wall connecting pieces are in assembly connection with the lower ends of the side wall block bodies (3).
4. The fabricated lining of an urban cave-shaped tunnel according to claim 3, wherein the top block comprises a top block body (5) and shoulder blocks (4) symmetrically distributed at two ends of the top block body (5), the shoulder blocks (4) comprise upper end side wall connecting sheets and top block connecting sheets connected with the upper end side wall connecting sheets, wherein,
the shoulder blocks (4) are located at the bending positions formed by the side walls and the tops of the urban portal tunnel, the upper end side wall connecting pieces are connected with the upper ends of the side wall block bodies (3) in an assembling mode, and the top block connecting pieces are connected with the top block bodies (5) in an assembling mode.
5. The fabricated lining of an urban cave-shaped tunnel according to claim 4, wherein the butt joint position of the bottom block (1) and the bottom block connecting piece, the butt joint position of the side wall block body (3) and the lower end side wall connecting piece, the butt joint position of the side wall block body (3) and the upper end side wall connecting piece and the butt joint position of the top block body (5) and the top block connecting piece all form an inclined butt joint, and the two parts forming the inclined butt joint are assembled and connected through a bolt perpendicular to the inclined butt joint.
6. The fabricated lining of the urban cave-shaped tunnel according to claim 4, wherein the butt joint position of the bottom block (1) and the bottom block connecting piece, the butt joint position of the side wall block body (3) and the upper end side wall connecting piece and the butt joint position of the top block body (5) and the top block connecting piece form an inclined butt joint seam, and the two parts forming the inclined butt joint seam are assembled and connected through a bolt perpendicular to the inclined butt joint seam; the side wall block body (3) and the butt joint position of the lower end side wall connecting sheet form a horizontal butt joint seam, and two parts forming the horizontal butt joint seam are assembled and connected through a plug connector.
7. The fabricated lining of an urban cave tunnel according to claim 5 or 6, wherein the angle between the inclined butt seam and the horizontal plane is 45 °.
8. The fabricated lining of an urban cave-shaped tunnel according to claim 5 or 6, wherein the two inclined butt joints are formed by the top block body (5) and the two top block connecting pieces in bilateral symmetry, and the distance between the bottom ends of the two inclined butt joints is smaller than that between the top ends so as to be supported by the top block connecting pieces after the top block body (5) is inserted into the space between the two top block connecting pieces.
9. The fabricated lining of an urban cave tunnel according to claim 5 or 6, wherein the bolts perpendicular to the oblique butt joints are penetrated by the inner side surface of the lining unit, and the inner side surface of the lining unit is provided with a sunk groove for accommodating the head of the bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020761046.6U CN212027800U (en) | 2020-05-09 | 2020-05-09 | Assembled lining of tunnel in shape of city portal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020761046.6U CN212027800U (en) | 2020-05-09 | 2020-05-09 | Assembled lining of tunnel in shape of city portal |
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| CN212027800U true CN212027800U (en) | 2020-11-27 |
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| CN202020761046.6U Active CN212027800U (en) | 2020-05-09 | 2020-05-09 | Assembled lining of tunnel in shape of city portal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441790A (en) * | 2020-05-09 | 2020-07-24 | 黄河勘测规划设计研究院有限公司 | Prefabricated lining of city gate-shaped tunnel and construction method of lining of city gate-shaped tunnel |
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2020
- 2020-05-09 CN CN202020761046.6U patent/CN212027800U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441790A (en) * | 2020-05-09 | 2020-07-24 | 黄河勘测规划设计研究院有限公司 | Prefabricated lining of city gate-shaped tunnel and construction method of lining of city gate-shaped tunnel |
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