CN113026435A - Subway shield interval plate type ballastless track construction method - Google Patents
Subway shield interval plate type ballastless track construction method Download PDFInfo
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- CN113026435A CN113026435A CN202110269528.9A CN202110269528A CN113026435A CN 113026435 A CN113026435 A CN 113026435A CN 202110269528 A CN202110269528 A CN 202110269528A CN 113026435 A CN113026435 A CN 113026435A
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- 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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/005—Making of concrete parts of the track in situ
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a construction method of a subway shield interval plate type ballastless track, which comprises the following steps: s1, establishing two logistics channels in a tunnel, operating a gantry crane on one channel, and operating an electric battery car on the other channel; s2, transferring the materials to the battery car through the station opening; s3, starting operation after a CP III precision measurement network is established in the tunnel; s4, installing a reinforcement cage to the base by using a gantry crane; s5, installing templates on two sides and end faces of the reinforcement cage, wherein the length of the base or the base is matched with the installation length of the two track plates; s6, conveying concrete into a storage battery car hopper from the hole, conveying the concrete to a working surface, opening a hopper valve, pouring the concrete, and manually assisting in vibrating; and S7, leveling the concrete 3mm higher than the template, and paving geotextile. The method does not occupy the total construction time, does not need large-scale equipment, does not need a special track laying base, improves the construction efficiency by 2-3 times compared with the prior art, does not generate buoyancy when the track slab is laid by a mortar sitting method, and is easier to ensure the construction precision.
Description
Technical Field
The invention belongs to the technical field of slab ballastless track construction, and particularly relates to a construction method of a slab ballastless track of a subway shield interval.
Background
The subway track mainly comprises a cast-in-place integral track bed, prefabricated sleepers, fasteners and steel rails. Along with the extension of the operation time, the ballast bed is changed due to the change of the tunnel under the external condition, so that the smoothness of the track is deteriorated, vibration noise is generated, and the maintenance workload is increased. In recent years, with the development of assembly type technologies, plate-type ballastless tracks are applied to subways, and the problem of maintenance is solved. Structurally, the slab ballastless track has a three-layer structure represented by Shanghai, and is divided into a base layer, a self-compacting concrete layer and a track slab layer. There is a two-layer structure represented by suzhou subway, which is divided into a base layer and a track slab layer. The construction method of the three-layer structure is that a circular tunnel rubber wheel transport vehicle is developed on construction equipment and is responsible for material transportation. In the construction process, a base structure is constructed firstly, then a track slab is laid, the track slab is finely adjusted, a mold is closed at the bottom of the slab, and concrete is poured into holes in the slab surface. The two-layer structure mainly adopts a first-frame and second-filling method in the construction scheme at present, and the construction equipment is the same as that of the three-layer method, so that the construction speed is less than 50m every day. Moreover, as concrete is poured under the slab, the buoyancy of the track slab is very large, which easily causes the damage to the finely adjusted result, and therefore, the construction method of the slab ballastless track of the shield zone of the subway is provided.
Disclosure of Invention
The invention aims to provide a construction method of a subway shield interval slab ballastless track, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a construction method of a subway shield interval plate type ballastless track comprises the following steps:
s1, establishing two logistics channels in a tunnel, operating a gantry crane on one channel, and operating an electric battery car on the other channel;
s2, transferring the materials to the battery car through the station opening;
s3, starting operation after a CP III precision measurement network is established in the tunnel;
s4, installing a reinforcement cage to the base by using a gantry crane;
s5, installing templates on two sides and end faces of the reinforcement cage, wherein the length of the base or the base is matched with the installation length of the two track plates;
s6, conveying concrete into a hopper of the storage battery car from the hole, conveying the concrete to an operation surface, opening a valve of the hopper, pouring the concrete, and manually assisting in vibrating;
s7, leveling the concrete 3mm higher than the template, and paving geotextile;
s8, placing the track slab on the surface of the geotextile by using a gantry crane before initial setting of concrete;
s9, placing an adsorption vibrator on the surface of the track slab, and finely adjusting the center line and the elevation of the track slab;
s10, positioning the track slab by using a support beam;
s11, inserting reinforcing steel bars into the limiting holes of the track plate, and pouring concrete until the track plate is flush;
s12, removing the template and the support beam after the concrete is finally set;
s13, mounting a fastener on a rail bearing platform on the rail plate surface;
s14, mounting ditch templates on two sides of the ballast bed, and pouring concrete;
s15, placing the steel rail on a fastener, and polishing rust of a rail head;
s16, welding a joint;
s17, polishing the joint;
s18, adjusting the track gauge, wherein the direction, height, level and superelevation of the track gauge are met, and the distortion indexes meet the requirements of design and standard specification;
s19, locking the fastener.
Preferably, the channel in S1 is composed of a triangular bracket and a steel rail, and is connected to the C-shaped groove of the segment in the tunnel through bolts.
Preferably, the CP III accurate measurement net is fixed on a C-shaped groove of a pipe piece in the tunnel through bolts, the CP III accurate measurement net is arranged at intervals of every 80m in a straight line section, the CP III accurate measurement net is arranged at intervals of every 50m in a curve section, and the CP III accurate measurement net is seen through from front to back.
Preferably, the height of the template in the S5 is less than the height of the base or the pedestal by 2mm, and the template is fixed on a C-shaped groove of a segment in the tunnel through bolts.
Preferably, when the foundation or the base in S5 is constructed, the reinforcement cage is hoisted first, then the formwork is installed, and the height of the foundation or the base is controlled by the height of the formwork.
Preferably, the initial setting time of the concrete in the S8 is 4-6h, the final setting time of the concrete in the S12 is 8-10h, and the concrete in the S14 is leveled when the casting height of the concrete is 3mm greater than the height of the template.
Preferably, when the track slab laying facility works, the track slab is laid before the initial setting of the base or the base concrete and is placed on the surface of the geotextile, the redundant concrete overflows through the adsorption vibrator, the total sinking amount of the edge of the template is controlled, and after the elevation and the central line of the track slab are accurately adjusted, the track slab is positioned by the support beam to enable the stress of the template to be converted.
Preferably, when the track slab is located and constructed in the S10 process, the steel bars are inserted into the track slab limiting holes, the poured concrete is flush with the slab surface, vibrated, and the slab is collected, and the locating beam, the foundation or the base side formwork are removed after the concrete is finally set.
Preferably, when the steel rail paving facility in the S15 works, the steel rail and the fasteners enter the tunnel from the station opening and are transported to an operation point through the flat battery car, the fasteners are installed on the rail plate rail bearing platform, the steel rail is placed on the fasteners through the gantry crane, rust on the ends of the steel rail is processed, the joints are welded and polished, the rail gauge is adjusted, and the fasteners are locked after rail direction, height, level, superelevation and distortion indexes are achieved.
Compared with the prior art, the invention has the beneficial effects that: the materials required by the operation enter through the station opening, all the operation processes form assembly line construction, wherein the concrete pouring process of the base or the base is a main line of the operation and is a time control point of a flow rhythm, the initial setting time of the concrete is a core control point, the operation before the concrete pouring occupies the total construction time, the operation after the concrete pouring is parallel operation, the total construction time is not occupied, large-scale equipment is not needed, a special track laying base is not needed, the construction efficiency is improved by 2-3 times compared with the prior art, track slab laying is constructed by a slurry sitting method, buoyancy is not generated, and the construction precision is easier to guarantee.
Drawings
FIG. 1 is a schematic view of the track structure construction of the present invention;
FIG. 2 is a schematic view of the bedding slurry construction of the present invention;
FIG. 3 is a schematic view of a method of securing a fixed beam according to the present invention;
FIG. 4 is a schematic view of a ditch construction method according to the present invention;
fig. 5 is a schematic view of the hopper structure of the present invention.
In the figure: 1. a tunnel; 2. a reinforcement cage; 3. a template; 4. a track plate; 5. a limiting table; 6. reinforcing steel bars; 7. a fastener; 8. a steel rail; 9. a rail bearing platform; 10. geotextile; 11. a ditch; 12. a triangular bracket; 13. transporting the steel rail; 14. an electric vehicle; 15. a CP III precision measurement network; 16. a gantry crane; 17. a hopper; 18. a valve; 19. a vibrator; 20. a prism; 21. adsorbing a vibrator; 22. positioning the beam; 23. and (4) bolts.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-5, the present invention provides a technical solution: a construction method of a subway shield interval plate type ballastless track comprises the following steps:
s1, establishing two logistics channels in a tunnel 1, wherein one channel runs a gantry crane 16, and the other channel runs an accumulator car 14;
s2, transferring the materials to the battery car 14 through the station opening;
s3, starting operation after a CP III accurate measurement network 15 is established in the tunnel 1;
s4, installing the reinforcement cage 2 to the base by using a gantry crane 16;
s5, installing templates 3 on two sides and end faces of the reinforcement cage 2, wherein the length of the base or the base is matched with the installation length of the two track plates 4;
s6, conveying concrete into a hopper 17 of the storage battery car 14 from the hole, conveying the concrete to a working surface, opening a valve 18 of the hopper 17, pouring the concrete, and manually assisting in vibrating;
s7, leveling the concrete 33mm higher than the template, and paving geotextile 10;
s8, placing the track slab 4 on the surface of the geotextile 10 by using a gantry crane 16 before initial setting of concrete;
s9, placing an adsorption vibrator 19 on the surface of the track slab 4, and finely adjusting the center line and the elevation of the track slab 4;
s10, positioning the track slab 4 by using a support beam;
s11, inserting reinforcing steel bars 6 into the limiting holes of the track plate 4, and pouring concrete until the track plate 4 is flush;
s12, removing the template 3 and the support beam after the concrete is finally set;
s13, mounting a fastener 7 on the rail bearing platform 9 on the surface of the rail plate 4;
s14, installing water channel 11 templates on two sides of the ballast bed, and pouring concrete;
s15, placing the steel rail 8 on the fastener 7, and polishing the rail head rust;
s16, welding a joint;
s17, polishing the joint;
s18, adjusting the track gauge, wherein the direction, height, level and superelevation of the track gauge are met, and the distortion indexes meet the requirements of design and standard specification;
s19, locking the fastener 7.
In this embodiment, the passage in S1 is preferably composed of a triangular bracket 12 and a steel rail 8, and is connected to the C-shaped groove of the tunnel segment by bolts 23.
In this embodiment, preferably, the CP iii precision measurement net 15 point is fixed on a C-shaped groove of a tunnel segment through a bolt 23, the CP iii precision measurement net 15 is arranged at intervals of every 80m in a straight line section, and is arranged at intervals of every 50m in a curve section, and the CP iii precision measurement net 15 is seen through from front to back.
In this embodiment, preferably, the height of the template 3 in S5 is less than the height of the base or foundation by 2mm, and the template is fixed on the C-shaped groove of the tunnel segment by the bolts 23.
In this embodiment, preferably, when the foundation or the base in S5 is constructed, the reinforcement cage 2 is lifted first, then the formwork 3 is installed, and the height of the foundation or the base is controlled by the height of the formwork 3.
In this embodiment, preferably, the initial setting time of the concrete in S8 is 6h, the final setting time of the concrete in S12 is 8h, and the concrete in S14 is leveled when the casting height is 3mm greater than the height of the formwork 3.
In this embodiment, preferably, when the track slab 4 is used for laying facilities, the track slab 4 is laid before the base or the base concrete is initially set and placed on the surface of the geotextile 10, the excess concrete overflows through the adsorption vibrator 21, the total amount of sinking of the edge of the formwork 3 is controlled, and after the track slab 4 is finely adjusted in elevation and central line, the track slab 4 is positioned by using the support beam to enable the formwork 3 to be stressed for conversion.
In this embodiment, preferably, when the track slab 4 is located and constructed in S10, the reinforcing steel bars 6 are inserted into the limiting holes of the track slab 4, the poured concrete is flush with the slab surface, vibrated, and slab-collected, and the locating beam 22 and the foundation or base side formwork 3 are removed after the concrete is finally set.
In this embodiment, preferably, when 8 laying facilities of the steel rail are worked in S15, the steel rail 8 and the fastener 7 enter the tunnel 1 from the station entrance, the tunnel is transported to an operation point through the flat battery car 14, the fastener 7 is installed on the rail bearing platform 9 of the rail plate 4, the steel rail 8 is placed on the fastener 7 by the gantry crane 16, rust at the end of the steel rail 8 is treated, a joint is welded, the joint is polished, the gauge is adjusted, and the fastener 7 is locked after the rail direction, height, level, superelevation and distortion indexes are reached.
Example 2
Referring to fig. 1-5, the present invention provides a technical solution: a construction method of a subway shield interval plate type ballastless track comprises the following steps:
s1, firstly, installing a triangular support 12 on a segment C-shaped groove in a tunnel 1 by using a bolt 23;
s2, installing a transportation steel rail 8 on the support;
s3, paving a CP III accurate measurement net 15 on the C-shaped groove, wherein 80m points are arranged in a linear section, 50m points are arranged in a curve section, and the front and the back are in full view;
s4, blanking at a station entrance, transporting the reinforcement cage 2 to an operation surface by using a battery car 14, and placing the bottom surface of the tunnel 1 by using a gantry crane 16;
s5, installing templates 3 on two sides of the reinforcement cage 2, and using the top elevation of the templates 3 as the bottom control elevation of the track slab 4;
s6, discharging concrete into a hopper 17 from a station opening, transporting the concrete to an operation surface by using a battery car 14, opening a valve 18 of the hopper 17, starting a vibrator 19 to enable a concrete pipe to be poured into the reinforcement cage 2, and manually assisting in vibrating until the concrete pipe is compacted;
s7, stopping after the concrete is 3mm higher than the edge of the template, leveling, and paving geotextile 10;
s8, transporting the track slab 4 to an operation surface before the initial setting of the concrete, placing the track slab 4 on the surface of the geotextile 10 by using a gantry crane 16, placing prisms 20 at four corners of the track slab 4, measuring elevation and a center line coordinate, and if the track slab 4 is higher than a design coordinate, starting an adsorption vibrator 21 to adjust the elevation and enabling the redundant concrete to overflow from the bottom of the slab;
s9, after the track slab 4 is adjusted, connecting and fixing the track slab by using bolts 23 between a positioning beam 22 and a track bearing platform 9 of the track slab 4, inserting reinforcing steel bars 6 into limiting holes of the track slab 4, and pouring concrete until the surface of the track slab 4 is flush;
s10, after the concrete is finally set, removing the templates 3 and the positioning beams 22, installing the templates 3 of the ditches 11 on two sides, and pouring the concrete;
s11, operating the fasteners 7 and the steel rails 8 to an operation surface from a flat battery car 14 for a station entrance, mounting the fasteners 7 on a rail bearing platform 9, and hoisting the steel rails 8 onto the fasteners 7 by using a gantry crane 16;
s12, polishing the rust on the head of the steel rail 8, welding the steel rail 8, and smoothly polishing the joint;
s13, locking the fastener 7 after adjusting the indexes of gauge, track direction, height, level, superelevation and distortion.
The working principle and the advantages of the invention are as follows: materials required by operation enter through a station opening, all operation processes form assembly line construction, wherein the base or base concrete pouring process is a main line of the operation and is a time control point of a flow rhythm, the initial setting time of concrete is a core control point, the operation before the concrete pouring occupies the total construction time, the operation after the concrete pouring is parallel operation, the total construction time is not occupied, large-scale equipment is not needed, a special track laying base is not needed, the construction efficiency is improved by 2-3 times compared with the prior art, the track plate 4 is laid to be constructed by a mortar method, buoyancy is not generated, and the construction precision is easier to guarantee.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A construction method of a subway shield interval plate type ballastless track is characterized by comprising the following steps: the method comprises the following steps:
s1, establishing two material flow channels in a tunnel (1), operating a gantry crane (16) on one channel, and operating an electric battery car (14) on the other channel;
s2, transferring the materials to the battery car (14) through the station opening;
s3, starting operation after a CP III precision measurement network (15) is built in the tunnel (1);
s4, installing the reinforcement cage (2) to the base by using a gantry crane (16);
s5, installing templates (3) on two sides and end faces of the reinforcement cage (2), wherein the length of the base or the base is matched with the installation length of the two track plates (4);
s6, conveying concrete into a hopper (17) of the storage battery car (14) from the hole, opening a valve (18) of the hopper (17), pouring concrete, and manually assisting in vibrating;
s7, leveling the concrete 3mm higher than the template (3), and paving geotextile (10);
s8, placing the track slab (4) on the surface of the geotextile (10) by using a gantry crane (16) before initial setting of concrete;
s9, placing an adsorption vibrator (19) on the surface of the track slab (4) and finely adjusting the center line and elevation of the track slab (4);
s10, positioning the track plate (4) by using a support beam;
s11, inserting reinforcing steel bars (6) into the limiting holes of the track plate (4), and pouring concrete until the track plate (4) is flush;
s12, removing the template (3) and the support beam after the concrete is finally set;
s13, mounting a fastener (7) on a rail bearing platform (9) on the surface of the rail plate (4);
s14, installing templates of ditches (11) on two sides of the ballast bed, and pouring concrete;
s15, placing the steel rail (8) on the fastener (7), and polishing the rail head rust;
s16, welding a joint;
s17, polishing the joint;
s18, adjusting the track gauge, wherein the direction, height, level and superelevation of the track gauge are met, and the distortion indexes meet the requirements of design and standard specification;
s19, locking the fastener (7).
2. The construction method of the subway shield interval plate type ballastless track according to claim 1, characterized in that: and the channel in the S1 consists of a triangular support (12) and a steel rail (8) and is connected to the C-shaped groove of the segment in the tunnel (1) through a bolt (23).
3. The construction method of the subway shield interval plate type ballastless track according to claim 1, characterized in that: the CP III precise measurement net (15) is fixed on a C-shaped groove of a pipe piece in the tunnel (1) through a bolt (23), the CP III precise measurement net (15) is arranged at intervals of every 80m in a straight line section, and is arranged at intervals of every 50m in a curve section, and the CP III precise measurement net (15) is seen from front to back.
4. The construction method of the subway shield interval plate type ballastless track according to claim 1, characterized in that: and the height of the template (3) in the S5 is less than the height of the substrate or the base by 2mm, and the template is fixed on a C-shaped groove of a segment in the tunnel (1) through a bolt (23).
5. The construction method of the subway shield interval plate type ballastless track according to claim 1, characterized in that: when the foundation or the base in the S5 is constructed, the reinforcement cage (2) is hoisted firstly, then the template (3) is installed, and the height of the foundation or the base is controlled through the height of the template (3).
6. The construction method of the subway shield interval plate type ballastless track according to claim 1, characterized in that: the initial setting time of the concrete in the S8 is 4-6h, the final setting time of the concrete in the S12 is 8-10h, and the concrete in the S14 is leveled when the casting height of the concrete is 3mm greater than the height of the template (3).
7. The construction method of the subway shield interval plate type ballastless track according to claim 1, characterized in that: when the track slab (4) is laid, the track slab (4) is laid before the initial setting of the base or the base concrete and is placed on the surface of the geotextile (10), the redundant concrete overflows through the adsorption vibrator (21), the total sinking amount is controlled at the edge of the template (3), and after the elevation and the central line of the track slab (4) are accurately adjusted, the track slab (4) is positioned by using the support beam to enable the stress of the template (3) to be converted.
8. The construction method of the subway shield interval plate type ballastless track according to claim 1, characterized in that: when the track slab (4) is positioned and constructed in the S10, the reinforcing steel bars (6) are inserted into the limiting holes of the track slab (4), the poured concrete is flush with the slab surface, vibrated and collected, and the positioning beam (22) and the foundation or base side template (3) are detached after the concrete is finally set.
9. The construction method of the subway shield interval plate type ballastless track according to claim 1, characterized in that: when the steel rail (8) is laid in the S15, the steel rail (8) and the fasteners (7) enter the tunnel (1) from the station hole and are transported to an operation point through the flat battery car (14), the fasteners (7) are installed on the rail bearing platform (9) of the rail plate (4), the steel rail (8) is placed on the fasteners (7) through the gantry crane (16), rust stains on the end heads of the steel rail (8) are processed, the connectors are welded, the connectors are polished, the gauge is adjusted, and the fasteners (7) are locked after rail direction, height, level, height and distortion indexes are achieved.
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| CN202110269528.9A CN113026435B (en) | 2021-03-12 | 2021-03-12 | Subway shield interval plate type ballastless track construction method |
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| CN202110269528.9A CN113026435B (en) | 2021-03-12 | 2021-03-12 | Subway shield interval plate type ballastless track construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113043449A (en) * | 2021-04-29 | 2021-06-29 | 中铁二局集团有限公司 | Subway track plate prefabrication production line and construction method |
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| CN111794018A (en) * | 2020-07-15 | 2020-10-20 | 中铁九局集团第六工程有限公司 | Construction method of ballastless track with replaceable supporting blocks by tunnel sleeve shoe method |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104775340A (en) * | 2015-03-24 | 2015-07-15 | 中交一航局第四工程有限公司 | Intra-tunnel elastic support block type ballastless track dual-line construction process |
| WO2017121044A1 (en) * | 2016-01-11 | 2017-07-20 | 北京城建设计发展集团股份有限公司 | Precast slab railway track structural system for vibration mitigation and associated construction method |
| CN109853306A (en) * | 2018-12-17 | 2019-06-07 | 中铁四局集团有限公司 | A kind of pre-track board construction method |
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| CN113043449A (en) * | 2021-04-29 | 2021-06-29 | 中铁二局集团有限公司 | Subway track plate prefabrication production line and construction method |
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