CN107034742B - Precast slab track structure applied to circular tunnel and construction method - Google Patents
Precast slab track structure applied to circular tunnel and construction method Download PDFInfo
- Publication number
- CN107034742B CN107034742B CN201710294974.9A CN201710294974A CN107034742B CN 107034742 B CN107034742 B CN 107034742B CN 201710294974 A CN201710294974 A CN 201710294974A CN 107034742 B CN107034742 B CN 107034742B
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- Prior art keywords
- track
- base
- track plate
- adjusting layer
- circular tunnel
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- 238000010276 construction Methods 0.000 title claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000004744 fabric Substances 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 239000004746 geotextile Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 229920002635 polyurethane Polymers 0.000 claims description 8
- 239000004814 polyurethane Substances 0.000 claims description 8
- 239000004567 concrete Substances 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011376 self-consolidating concrete Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/008—Drainage of track
Abstract
A precast slab track structure applied to a circular tunnel and a construction method thereof comprise a base, geotechnical cloth and a track slab which are sequentially arranged from bottom to top; an adjusting layer for eliminating manufacturing errors of the base and the track plate is arranged between the geotechnical cloth and the track plate; the bottom of the track plate is provided with a connecting position, a reinforcing mesh is arranged in the adjusting layer, and the connecting position is fixedly connected with the reinforcing mesh; drainage ditches are arranged on two sides of the track plate, the drainage ditches are formed by surrounding the side wall of the track plate, the top surface of the adjusting layer and the side wall of the circular tunnel, and two parallel steel rails are arranged on the track plate. The adjusting layer and the base are arranged in an isolated manner through geotechnical cloth, so that the later-stage overhaul and maintenance of the base are facilitated, meanwhile, the drainage ditch is formed by the side wall of the track plate, the top surface of the adjusting layer and the side wall of the circular tunnel in a surrounding mode, the cross-sectional area of the drainage ditch is increased, the drainage efficiency is improved, water flow does not contact with the base, the risk of water seepage of the base is reduced, and the service life of the base is prolonged.
Description
Technical Field
The application belongs to the field of track traffic construction, and particularly relates to a precast slab track structure applied to a circular tunnel.
Background
Compared with the traditional cast-in-situ track slab, the prefabricated track slab has the advantages of high construction speed, high quality, environmental friendliness and good maintainability, and is particularly suitable for the field of underground tunnel track traffic.
At present, the prefabricated track slab technology is mostly adopted on a track traffic ground line or an overhead line, and a circular tunnel with an underground 5.4m inner diameter is difficult to set up due to limited tension, drainage, poor integrity of the track slab structure, difficult maintenance in the later period and the like, so that the prefabricated track slab technology is not popularized on a large scale. For example, the prefabricated plate type vibration reduction track structure system and the matched construction method are named, the application number is 201610013534.7, the drainage ditch is formed by pouring a filling layer, the shape of the filling layer is irregular, the pouring difficulty is increased, meanwhile, the cross section area of the drainage ditch is reduced, the drainage efficiency is reduced, water is in direct contact with the filling layer, and the service life of the filling layer is also influenced. For this reason, a new prefabricated slab track structure needs to be developed to meet the requirements of underground circular tunnel track traffic.
Disclosure of Invention
In order to overcome the technical defects, the application provides the prefabricated slab track structure applied to the circular tunnel, which is convenient for drainage, overhaul and maintenance.
In order to solve the problems, the application is realized according to the following technical scheme:
the application provides a precast slab track structure applied to a circular tunnel, which comprises a base, geotechnical cloth and a track slab which are sequentially arranged from bottom to top; an adjusting layer for eliminating manufacturing errors of the base and the track plate is arranged between the geotechnical cloth and the track plate;
the bottom of the track plate is provided with a connecting position, a reinforcing mesh is arranged in the adjusting layer, and the connecting position is fixedly connected with the reinforcing mesh; drainage ditches are arranged on two sides of the track plate and are formed by surrounding the side wall of the track plate, the top surface of the adjusting layer and the side wall of the circular tunnel; two parallel steel rails are arranged on the track plate, and the steel rails are fixed on the track plate through fasteners.
Further, the upper portion of the base is of a planar structure.
Further, the adjusting layer is of a flat plate structure, and two sides of the adjusting layer are respectively attached to the inner wall of the circular tunnel.
Further, the connection between the adjusting layer and the inner wall of the circular tunnel and the connection between the adjusting layer and the inner wall of the track plate are coated with waterproof materials.
Further, the waterproof material is type II polyurethane.
Further, a plurality of limit bosses are arranged on the base, and the limit bosses are arranged between the adjacent track plates.
Further, the limit boss is a square column.
Further, an elastic layer is arranged between the limit boss and the track plate.
Further, the track plate is provided with a plurality of pouring holes for pouring the adjusting layer.
A construction method of a precast slab track structure applied to a circular tunnel comprises the following steps:
s1: fixing the steel rail on the upper part of the track plate, and fixing the reinforcing mesh on the connecting position of the lower part of the track plate;
s2: binding a reinforcement cage of the base and the limiting boss, and pouring the base and the limiting boss;
s3: laying geotextile on the base;
s4: laying the track plate above the geotextile and maintaining a gap of about 100mm with the geotextile;
s5: finely adjusting the positions of the track plates, and pouring concrete into the gaps to form an adjusting layer;
s6: polyurethane is poured between the limit boss and the track plate to form an elastic layer;
s7: and coating waterproof materials at the connection part of the adjusting layer and the inner wall of the circular tunnel and the connection part of the adjusting layer and the inner wall of the track plate.
According to the prefabricated slab track structure applied to the circular tunnel, the adjusting layer and the base are arranged in an isolated mode through the geotechnical cloth, so that later-stage overhaul and maintenance of the base are facilitated, meanwhile, the drainage ditch is formed by the side wall of the track slab, the top surface of the adjusting layer and the side wall of the circular tunnel in a surrounding mode, the cross-sectional area of the drainage ditch is greatly increased, the drainage efficiency is improved, water flow does not contact with the base, the risk of water seepage of the base is reduced, and the service life of the base is prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate and together with the description serve to explain the application, in which:
fig. 1 is a schematic structural view of a prefabricated slab track structure applied to a circular tunnel according to embodiment 1 of the present application;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic structural view of a prefabricated slab track structure applied to a circular tunnel according to embodiment 2 of the present application.
Detailed Description
Example 1
The utility model provides a be applied to prefabricated plate track structure in circular tunnel, it includes base 1, geotechnique's cloth 2 and track board 4 that set gradually from bottom to top. And the geotextile 2 and the track plate 4 are adjusted to form an adjusting layer 3, and after the relative positions of the base 1, the geotextile 2 and the track plate 4 are determined, concrete is poured to form the adjusting layer 3, so that manufacturing errors of the base and the track plate are eliminated. Geotechnical cloth 2 is used for keeping apart base 1 and adjustment layer 3, makes things convenient for adjustment layer 3 to break away from with base 1, when base 1 appears quality problem, lifts up adjustment layer 3, the maintenance of base 1 of being convenient for. The lower part of the track plate 4 is provided with a connecting position 41, the connecting position 41 is fixedly connected with a reinforcing mesh 42, and the reinforcing mesh 42 is arranged in the adjusting layer 3, so that the track plate is fixedly combined with the adjusting layer 3. The both sides of track board 4 are equipped with escape canal 5, and escape canal 5 is enclosed by the lateral wall of track board 4, the top surface of adjustment layer 3 and the lateral wall of circular tunnel 8, compares in prior art, and this escape canal 5's cross-sectional area greatly increased has improved the efficiency of drainage, simultaneously, rivers do not contact with base 1, have reduced the risk of base 1 infiltration, have improved the life-span of base 1. Two parallel steel rails 6 are arranged on the track plate 4, and the steel rails 6 are fixed on the track plate 4 through fasteners 7.
Preferably, the upper portion of the base 1 is of a planar structure, and the adjusting layer 3 is of a flat plate structure, so that pouring of the base 1 and the adjusting layer 3 is more convenient, construction difficulty is reduced, and construction speed is improved. Meanwhile, two sides of the adjusting layer 3 are respectively attached to the inner wall of the circular tunnel 8, waterproof materials 31 are coated at the joint of the adjusting layer 3 and the inner wall of the circular tunnel 8 and the joint of the adjusting layer 3 and the inner wall of the track plate 4, and preferably, type II polyurethane is selected as the waterproof materials 31. When a train passes through, the precast slab track structure is stressed to vibrate, and the II-type polyurethane has elasticity and cannot break, so that the sealing of the junction between the adjusting layer 3 and the inner wall of the circular tunnel 8 and the junction between the adjusting layer 3 and the inner wall of the track slab 4 can be ensured, and the water accumulation in the drainage ditch 5 is prevented from penetrating into the base 1.
Preferably, a plurality of limiting bosses 11 are provided on the base 1, and the limiting bosses 11 are provided between adjacent track plates 4. One limiting boss 11 can limit the positions of the two track plates 4 at the same time, so that the number of the limiting bosses 11 is reduced, and the limiting efficiency is improved. The casting base 1 and the limiting boss 11 are cast at the same time, and the limiting boss 11 is designed into a square column, so that the transverse force and the longitudinal force of the track plate in the horizontal direction can be resisted more efficiently. Meanwhile, an elastic layer 12 is arranged between the limit boss 11 and the track plate 4. Because there is certain error in the preparation of track board 4, also there is certain error in the work progress, consequently, can exist the gap between spacing boss 11 and the track board 4, this gap fills elastic material promptly and forms elastic layer 12, simultaneously, when track board 4 atress, elastic layer 12 can also play the cushioning effect, prevents that track board 4 and spacing boss 11 from taking place rigid striking, prevents to damage track board 4 and spacing boss 11. Preferably, the material of the elastic layer 12 is polyurethane.
Preferably, a plurality of pouring holes 41 are provided in the track slab 4, the pouring holes 41 being used for pouring self-compacting concrete to form the adjustment layer 3. In the process of the construction of the base 1, the plane on the upper portion of the base 1 is uneven due to construction errors, so that when the track plate 4 is installed, the track plate 4 can be placed above the base 1 by about 100mm, self-compacting concrete is poured between the base 1 and the track plate 4, errors in the construction of the base 1 are adjusted, and the track plate 4 is guaranteed to be installed at an accurate position.
Example 2
The embodiment 2 is different from the embodiment 1 in that: the upper part of the base 1 in the embodiment 1 is a horizontal plane structure, and the structure is suitable for a linear tunnel; the upper part of the base 1 in embodiment 2 is a sloping planar structure which is suitable for a curved tunnel, wherein the sloping angle of the planar structure of the upper part of the base 1 depends on the curvature of the curved tunnel and the design speed per hour of the train.
The application discloses a construction method of a precast slab track structure applied to a circular tunnel, which comprises the following steps:
s1: fixing the steel rail 6 on the upper part of the track plate 4, and fixing the reinforcing mesh 42 on the connecting position 41 on the lower part of the track plate 4;
s2: binding the reinforcement cages of the base 1 and the limit boss 11 and pouring the base 1 and the limit boss 11;
s3: paving geotextile 2 on the base 1;
s4: laying the track slabs 4 above the geotextile 2 and maintaining a gap of about 100mm with the geotextile 2;
s5: finely adjusting the position of the track plate 4, and pouring concrete into the gap to form an adjusting layer 3;
s6: polyurethane is poured between the limit boss 11 and the track plate 4 to form an elastic layer 12;
s7: the junction of the adjustment layer 3 with the inner wall of the circular tunnel and the junction of the adjustment layer 3 with the inner wall of the track plate 4 are painted with a waterproof material 31.
The application pours the base 1 before the track plate 4 is transported into the tunnel, and the top surface of the base 1 is plane and regular in shape, thereby not only facilitating the pouring of the base 1, but also facilitating the movement and operation of the tool for transporting the track plate 4 in the tunnel and fine adjustment of the position of the track plate 4.
While the preferred embodiments of the present application have been described in detail, it should be understood that numerous modifications and variations can be made in accordance with the concepts of the application by those skilled in the art without the exercise of inventive faculty. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or according to limited experiments by a person skilled in the art based on the prior art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (4)
1. The construction method of the prefabricated slab track structure applied to the circular tunnel is characterized by comprising the following steps of:
the precast slab track structure applied to the circular tunnel comprises a base, geotextile and track slabs which are sequentially arranged from bottom to top, wherein the upper part of the base is of a planar structure, a plurality of limit bosses are arranged on the base, the limit bosses are arranged between adjacent track slabs, an elastic layer is arranged between the limit bosses and the track slabs, and when a linear tunnel is constructed, the upper part of the base is of a horizontal planar structure; when a curve tunnel is constructed, the upper part of the base is of an inclined plane structure;
an adjusting layer for eliminating manufacturing errors of the base and the track plate is arranged between the geotechnical cloth and the track plate, the adjusting layer is of a flat plate structure, and a plurality of pouring holes for pouring the adjusting layer are formed in the track plate;
the bottom of the track plate is provided with a connecting position, a reinforcing mesh is arranged in the adjusting layer, and the connecting position is fixedly connected with the reinforcing mesh;
drainage ditches are arranged on two sides of the track plate and are formed by surrounding the side wall of the track plate, the top surface of the adjusting layer and the side wall of the circular tunnel;
two parallel steel rails are arranged on the track plate and are fixed on the track plate through fasteners;
the construction method of the precast slab track structure applied to the circular tunnel comprises the following steps:
s1: fixing the steel rail on the upper part of the track plate through a fastener, and fixing the reinforcing mesh on the connecting position of the lower part of the track plate;
s2: binding a reinforcement cage of the base and the limit boss, pouring the base and the limit boss, and pouring the base before the track slab is conveyed into the tunnel;
s3: laying geotextile on the base;
s4: laying the track plate above the geotextile and maintaining a gap of about 100mm with the geotextile;
s5: finely adjusting the positions of the track plates, and pouring concrete into the gaps to form an adjusting layer;
s6: polyurethane is poured between the limit boss and the track plate to form an elastic layer;
s7: and coating waterproof materials at the connection part of the adjusting layer and the inner wall of the circular tunnel and the connection part of the adjusting layer and the inner wall of the track plate, wherein the waterproof materials are II-type polyurethane.
2. The construction method of the prefabricated slab track structure applied to the circular tunnel according to claim 1, wherein the construction method comprises the following steps: and two sides of the adjusting layer are respectively attached to the inner wall of the circular tunnel.
3. The construction method of the prefabricated slab track structure applied to the circular tunnel according to claim 2, wherein the construction method comprises the following steps: the junction of adjustment layer and the inner wall of circular tunnel and the junction of adjustment layer and the inner wall of track board all scribble waterproof material.
4. The construction method of the prefabricated slab track structure applied to the circular tunnel according to claim 1, wherein the construction method comprises the following steps: the limit boss is a square column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710294974.9A CN107034742B (en) | 2017-04-28 | 2017-04-28 | Precast slab track structure applied to circular tunnel and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710294974.9A CN107034742B (en) | 2017-04-28 | 2017-04-28 | Precast slab track structure applied to circular tunnel and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107034742A CN107034742A (en) | 2017-08-11 |
| CN107034742B true CN107034742B (en) | 2023-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710294974.9A Active CN107034742B (en) | 2017-04-28 | 2017-04-28 | Precast slab track structure applied to circular tunnel and construction method |
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| Country | Link |
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| CN (1) | CN107034742B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453541A (en) * | 2019-08-16 | 2019-11-15 | 西南交通大学 | A kind of flush type track |
| CN110468628A (en) * | 2019-08-28 | 2019-11-19 | 吴永芳 | A kind of position limiting structure and assembled track for assembled track |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3878987A (en) * | 1972-02-10 | 1975-04-22 | Japan National Railway | Railway track structure |
| CN101613453A (en) * | 2009-07-23 | 2009-12-30 | 中国铁道科学研究院金属及化学研究所 | The resin combination that is used for the filling unit plate type ballastless track convex baffling platform |
| CN102250310A (en) * | 2011-06-03 | 2011-11-23 | 黎明化工研究院 | Polyurethane resin composite as well as preparation method and application thereof |
| CN102966008A (en) * | 2011-08-31 | 2013-03-13 | 中国铁道科学研究院铁道建筑研究所 | Ballastless track system |
| CN105200868A (en) * | 2015-09-14 | 2015-12-30 | 中国铁道科学研究院金属及化学研究所 | Novel slab ballastless track structure |
| CN105256669A (en) * | 2015-09-30 | 2016-01-20 | 成都市新筑路桥机械股份有限公司 | Embedded track system used in tunnel |
| CN106120479A (en) * | 2016-08-23 | 2016-11-16 | 吴永芳 | The board-like track structure of a kind of assembling |
| CN207017078U (en) * | 2017-04-28 | 2018-02-16 | 广州地铁设计研究院有限公司 | A kind of prefabricated plate rail structure applied to circular tunnel |
-
2017
- 2017-04-28 CN CN201710294974.9A patent/CN107034742B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3878987A (en) * | 1972-02-10 | 1975-04-22 | Japan National Railway | Railway track structure |
| CN101613453A (en) * | 2009-07-23 | 2009-12-30 | 中国铁道科学研究院金属及化学研究所 | The resin combination that is used for the filling unit plate type ballastless track convex baffling platform |
| CN102250310A (en) * | 2011-06-03 | 2011-11-23 | 黎明化工研究院 | Polyurethane resin composite as well as preparation method and application thereof |
| CN102966008A (en) * | 2011-08-31 | 2013-03-13 | 中国铁道科学研究院铁道建筑研究所 | Ballastless track system |
| CN105200868A (en) * | 2015-09-14 | 2015-12-30 | 中国铁道科学研究院金属及化学研究所 | Novel slab ballastless track structure |
| CN105256669A (en) * | 2015-09-30 | 2016-01-20 | 成都市新筑路桥机械股份有限公司 | Embedded track system used in tunnel |
| CN106120479A (en) * | 2016-08-23 | 2016-11-16 | 吴永芳 | The board-like track structure of a kind of assembling |
| CN207017078U (en) * | 2017-04-28 | 2018-02-16 | 广州地铁设计研究院有限公司 | A kind of prefabricated plate rail structure applied to circular tunnel |
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| CN107034742A (en) | 2017-08-11 |
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