CN114753190A - Construction method for transforming whole ballast bed of operation line - Google Patents
Construction method for transforming whole ballast bed of operation line Download PDFInfo
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- CN114753190A CN114753190A CN202210411109.9A CN202210411109A CN114753190A CN 114753190 A CN114753190 A CN 114753190A CN 202210411109 A CN202210411109 A CN 202210411109A CN 114753190 A CN114753190 A CN 114753190A
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- sleeper
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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
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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
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
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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
- 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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/10—Making longitudinal or transverse sleepers or slabs in situ or embedding them
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention discloses a construction method for reconstructing an integral track bed of an operation line, which comprises the steps of firstly, carrying out measurement and rechecking on the existing track surface, and calculating the lifting amount of a steel rail and the padding height value of an original sleeper; then, after the rail surface and the rail bottom slope are adjusted at the original sleeper, a new sleeper is cast in situ between two adjacent original sleepers; and after all the new sleepers are poured, removing the fasteners on the original sleepers, mounting the compression type rail vibration absorber fasteners on the new sleepers, and then moving the new sleepers forward and backward, and finally performing formwork erection and concrete pouring on the original sleepers to restore the whole track bed. The method does not need to destroy the track bed structure at the original sleeper, and pours the new sleeper in the area between the adjacent original sleepers, thereby greatly reducing the bed height value of the sleeper surface, and when the new sleeper is installed, the travelling crane always normally operates on the original sleeper, thereby avoiding adverse effect on the normal operation of a track line.
Description
Technical Field
The invention relates to the field of monolithic roadbed construction, in particular to a construction method for transforming a monolithic roadbed of an operation line.
Background
The whole track bed of the subway operation line is provided with floating slab track beds at the front and the back, and large uneven settlement is generated along with the increase of the operation time of the track investment, so that the front and the back floating slab track beds need to be transformed to heighten the track surface. At present, will raise the rail face, need to change the sleeper of extension bolt in order to stabilize the circuit, chisel the whole railway roadbed sleeper of original position department to the new sleeper of quick replacement pours super rapid hardening self-compaction concrete in order to accomplish the transformation. At present, the mode of replacing new sleepers is to prefabricate new sleepers in a factory firstly, then chisel old sleepers and install new sleepers singly on site, the construction time is too long, the whole track bed needs to be damaged in a large area, and the normal operation of a track line is influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction method for transforming an integral track bed of an operating line, and solves the problems of height adjustment of the conventional track surface, long construction time, high construction safety risk and influence on the normal operation of a track line.
The technical scheme of the invention is as follows:
a construction method for reconstructing an integral ballast bed of an operation line specifically comprises the following steps:
(1) and (3) rechecking the existing rail surface measurement:
the method comprises the steps that a total station is utilized to accurately measure the rail surface elevation, the measured current rail surface elevation H1 is compared with the reformed design rail surface elevation H2, the lifting amount H of a steel rail is calculated to be H2-H1, a new sleeper is installed between two adjacent original sleepers, the structural height of a fastener on the new sleeper is H3, an operation space with the height of H4 is reserved due to on-site formwork erection construction, when the new sleeper is installed, the pad height value H of the original sleeper is H-H3+ H4 is H- (H3-H4), and the reserved height H4 is smaller than the structural height H3 of the fastener on the new sleeper;
(2) adjusting the rail surface and the rail bottom slope:
when a new sleeper is installed, an iron base plate with the height of h is installed below an original sleeper fastener, then the thickness of a wedge-shaped rubber pad required by adjusting a rail base slope at each original sleeper is calculated, and then the wedge-shaped rubber pads with corresponding thicknesses are selected to be installed below a steel rail and on the original sleeper fastener, so that the adjustment of the rail base slope is realized;
(3) And a new cast-in-place sleeper:
firstly chiseling off a ballast bed part between two adjacent original sleepers, wherein the chiseling-off depth is based on exposing upper-layer steel bars of the ballast bed, then planting bars according to a designed position, installing a steel bar cage of a new sleeper, and binding and connecting the planted bars with the steel bar cage of the new sleeper; finally, a special template for the cast-in-place sleeper is arranged outside a reinforcement cage of the new sleeper and below the steel rail, and finally, ultra-fast-hardening self-compacting concrete is mixed and the new sleeper is poured;
(4) and replacing the fastener:
after all the new sleepers are poured, the fasteners on the original sleepers are removed, new fasteners are arranged on the new sleepers, and the new sleepers are moved forward and backward along the slope again;
(5) and recovering the integral ballast bed:
the method comprises the steps of roughening and cleaning the surfaces of an original sleeper and a track bed, binding reinforcing steel bars section by section, erecting a template and pouring concrete to restore the whole track bed, namely, under the condition that the original sleeper is not dismounted, pouring concrete on the original sleeper to be used as a part of a new whole track bed, and meeting the requirement of the surface height difference of a cast-in-place sleeper and the track bed.
In the step (2), the iron base plate with the height of h is installed under the original sleeper fastener, and meanwhile, the front and rear track bed sections are subjected to down slope.
In the step (2), after the rail bottom slope is adjusted, the rail bottom slope measuring instrument is used for rechecking the rail bottom slope reaching the standard, and the error range of the rail bottom slope adjustment is 1/50-1/30.
The steel reinforcement cage of the new sleeper is prefabricated and formed and then is taken to a construction site for installation.
The steel bars in the step (3) are phi 12 deformed steel bars, the steel bars are implanted into the conventional ballast bed by 110-130mm, and the extending length is not less than 40mm according to the thickness of the protective layer.
In the step (3), the concrete steps of installing the cast-in-place sleeper special template are as follows:
a. firstly, placing a support rubber mat on a sleeper top template, penetrating the sleeper top template and the support rubber mat from the bottom of a steel rail, and enabling the steel rail to penetrate between two strip-shaped limiting blocks on the sleeper top template, and then temporarily supporting and positioning the sleeper top template;
b. positioning two nylon sleeves under two bolt through holes of a sleeper top template, penetrating two anchoring bolts through the two bolt through holes on the sleeper top template, and connecting the two anchoring bolts with corresponding nylon sleeves in a threaded manner, so that the top ends of the nylon sleeves are tightly contacted with the lower end surface of the sleeper top template, and the heads of the anchoring bolts are tightly attached to the upper end surface of the sleeper top template;
c. connecting the bottom ends of the two hanging die tie bars to the two anchor bolts, sleeving the through holes on the hanging die cross bar on the two hanging die tie bars, supporting the hanging die cross bar on the top surface of the steel rail, screwing the locking nuts on the two hanging die tie bars, driving the sleeper top template to move upwards by the two hanging die tie bars to extrude the steel rail, clamping the steel rail between the sleeper top template and the hanging die cross bar, namely hoisting the sleeper top template on the steel rail, and finally clamping the two L-shaped rail distance blocks between the rail bottom of the steel rail and the corresponding strip-shaped limiting blocks, wherein the setting of the cast-in-place sleeper rail bottom slope is finished;
d. And (4) placing the sleeper sideform below the sleeper top form and closing the sleeper sideform and the sleeper top form.
In the step (3), the concrete steps of mixing the ultra-fast-hardening self-compacting concrete and pouring a new sleeper are as follows: pouring concrete from a pouring hole in the side with the higher gradient of the sleeper, wherein the top formwork and the side formwork of the sleeper are tightly closed, mortar is poured from top to bottom, and air bubbles are discharged from a reserved exhaust hole; when the concrete pouring is finished, the concrete overflows the exhaust holes on the lower side of the sleeper slope, then an iron hammer is used for knocking the sleeper top template to discharge gas from the exhaust holes, and the concrete and the sleeper top template are compact and bubble-free.
In the step (4), the whole track bed is equally divided into a plurality of replacement areas according to the axial direction of the track, firstly, all fasteners on the original sleepers in each replacement area are removed, new fasteners are installed on all new sleepers in the replacement areas, the slope is followed forward and backward again, and the upper step is repeated until all the new fasteners in all the replacement areas of the whole track bed are completely replaced and removed.
In the step (4), after all the new and old fasteners on the whole track bed are replaced, installed and disassembled, the geometric state of the line is checked and confirmed again, and the geometric state of the line is ensured to be within an allowable range.
The invention has the advantages that:
(1) according to the invention, the new sleeper is arranged between two adjacent original sleepers, so that the height of the original sleeper is H-H3+ H4H- (H3-H4), and the height of the new sleeper is reduced by at least H3-H4 compared with the height of the new sleeper replaced at the position of the original sleeper, so that the safety risk of operation after a line is heightened is greatly reduced;
(2) when a new sleeper is installed, a travelling crane normally operates on the original sleeper all the time, so that adverse effects on normal operation of a track line are avoided;
(3) the special cast-in-place sleeper template of the new sleeper is positioned right below the steel rail in a hoisting mode, so that the special cast-in-place sleeper template is simple and quick to assemble and disassemble and convenient to use in a turnover mode, the new cast-in-place sleeper is ensured to have a rail base slope meeting the standard, and the structural size meets the design requirement;
(4) the invention does not need to destroy the track bed structure at the original sleeper, and only needs to pour concrete at the original sleeper to be used as a part of a new integral track bed, thereby greatly reducing the construction difficulty and improving the construction efficiency.
Drawings
FIG. 1 is a schematic view of the rail surface and rail base slope adjustment structure of the present invention.
Fig. 2 is a schematic view of an installation structure of the cast-in-place sleeper special formwork of the invention.
The number of the steel rail is 1, an iron base plate, 2, an original sleeper fastener, 3, an original sleeper, 4, a wedge-shaped rubber pad, 5, a steel rail, 6, a sleeper top template, 7, a sleeper side template, 8, a supporting rubber pad, 9, an L-shaped rail distance block, 10, an anchoring bolt, 11, a nylon sleeve, 12, a hanging die cross rod, 13, a hanging die tie rod, 14, a locking nut, 15, a connecting nut and 16, and a strip-shaped limiting block.
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.
A construction method for reconstructing an integral ballast bed of an operation line specifically comprises the following steps:
(1) and (3) rechecking the existing rail surface measurement:
the method comprises the steps that a total station is utilized to accurately measure the elevation of a rail surface, the measured current rail surface elevation H1 is compared with the reformed design rail surface elevation H2, the lifting amount H of a steel rail is calculated to be H2-H1, a new sleeper is installed between two adjacent original sleepers, the structural height of a compression type rail damper fastener on the new sleeper is 50mm, an operation space with the height of 15mm is reserved due to on-site formwork erection construction, and the height H of the original sleeper is H-50+15 to be H-35mm when the new sleeper is installed; if a construction mode that a new sleeper is replaced at the position of an original sleeper is adopted, because the structural height of the compression type rail shock absorber fastener on the new sleeper is 50mm, and the structural height of the fastener on the original sleeper is 86mm, the height H +86-50 of the new sleeper surface is not larger than that of the original sleeper surface, namely H +36mm, which is equivalent to the construction mode that the invention is adopted, the lifting amount of the sleeper is reduced by 71 mm;
(2) Adjusting the rail surface and the rail bottom slope:
when a new sleeper is installed, an iron base plate 1 with the height of (H-35) mm is installed below an original sleeper fastener 2, the types of the iron base plate 1 comprise two types of the iron base plate 1 with the thickness of 20mm and the iron base plate 1 with the thickness of 10mm, and the iron base plate 1 with the height of H is installed below the original sleeper fastener 2, and meanwhile, a front ballast bed section and a rear ballast bed section are subjected to down-slope operation; then calculating the thickness (including three specifications of 4-12mm, 6-12mm and 8-12 mm) of the wedge-shaped rubber pad 4 required by adjusting the rail bottom slope at each original sleeper 3, and then selecting the wedge-shaped rubber pad 4 with the corresponding thickness to be installed below the steel rail 5 and on the original sleeper fastener 2 to realize the adjustment of the rail bottom slope; after the rail bottom slope is adjusted, rechecking the rail bottom slope standard reaching condition by using a rail bottom slope measuring instrument, wherein the adjusting error range of the rail bottom slope is 1/50-1/30;
(3) and casting a sleeper in situ:
the reinforcement cage of the new sleeper is prefabricated and molded and then is brought to a construction site, firstly, a railway bed part between two adjacent original sleepers 3 is chiseled, the chiseled depth is 50mm, the width of the reinforcement cage in the vertical line direction is 48-50mm based on the exposed upper layer reinforcement of the railway bed, waste slag, dust and the like are cleaned up by a dust collector, then, reinforcements are planted according to the designed position, the planted reinforcements are phi 12 deformed steels, the reinforcements are implanted into the existing railway bed for 110 and 130mm, the extending length of the reinforcements is not less than 40mm according to the thickness of a protective layer, then, the reinforcement cage of the new sleeper is installed, the planted reinforcements are bound and connected with the reinforcement cage of the new sleeper, finally, a special template for a cast-in-place sleeper is installed outside the reinforcement cage of the new sleeper and below a steel rail 5, and finally, ultra-fast-hard self-compacting concrete is mixed and the new sleeper is poured;
The method comprises the following specific steps of installing a special template for the cast-in-place sleeper (see figure 2) and pouring a new sleeper:
a. firstly, after a support rubber mat 8 is placed on a sleeper top template 6, the sleeper top template 6 and the support rubber mat 8 penetrate through the bottom of a steel rail 5, the steel rail 5 penetrates between two strip-shaped limiting blocks 16 on the sleeper top template 6, and then the sleeper top template 6 is temporarily supported and positioned;
b. two nylon sleeves 11 are positioned right below two bolt through holes of a sleeper top template 6, two anchor bolts 10 penetrate through the two bolt through holes on the sleeper top template 6 and are in threaded connection with the corresponding nylon sleeves 11, so that the top ends of the nylon sleeves 11 are in close contact with the lower end face of the sleeper top template 6, and the heads of the anchor bolts 10 are tightly attached to the upper end face of the sleeper top template 6;
c. connecting the bottom ends of two hanging die tie bars 13 to connecting nuts 15 at the top ends of two anchor bolts 10, sleeving the through holes on two hanging die cross bars 12 on the two hanging die tie bars 13, supporting the hanging die cross bars 12 on the top surfaces of steel rails 5, screwing locking nuts 14 on the two hanging die tie bars 13, driving a sleeper top template 6 to move upwards to extrude the steel rails 5 by the two hanging die tie bars 13, clamping the steel rails 5 between the sleeper top template 6 and the hanging die cross bars 12, namely, enabling the sleeper top template 6 to be hung on the steel rails 5, finally clamping two L-shaped track gauge blocks 9 between the rail bottom of the steel rails 5 and corresponding strip-shaped limiting blocks 16, and setting a cast-in-situ sleeper rail bottom slope;
d. And (3) placing the sleeper sideform 7 below the sleeper cope match-plate 6 and matching the sleeper sideform with the sleeper cope match-plate 6.
e. Pouring concrete from a pouring hole on the side with the higher gradient of the sleeper, wherein the sleeper top template 6 and the sleeper side template 7 are tightly closed, mortar is poured from top to bottom, and air bubbles are discharged from a reserved exhaust hole; when the concrete pouring is finished, the concrete overflows the exhaust holes on the lower side of the sleeper slope, then an iron hammer is used for knocking the sleeper top template 6 to discharge gas from the exhaust holes, and the concrete and the sleeper top template 6 are compact and have no bubbles;
f. after the concrete is initially set, removing the suspended mould cross rod 12 from the two suspended mould tie rods 13, removing the two suspended mould tie rods 13 from the two anchor bolts 10, removing the two L-shaped track distance blocks 9 from the steel rail 5, and lifting the steel rail by using a track lifting machine so as to take out the support rubber mat 8; due to the arrangement of the L-shaped gauge block 9, when the transverse displacement of the rail bottom of the steel rail 5 is less than 14mm, the rail bottom of the steel rail 5 can be ensured to be not in contact with the strip-shaped limiting block 16; after the supporting rubber mat 8 is taken out, the steel rail 5 is supported on the original sleeper 3, and a gap is formed between the steel rail 5 and the sleeper top template 6, namely, a crane on the steel rail 5 can not apply pressure to the sleeper top template 6, namely, the cast-in-place sleeper below the sleeper top template 6 can not be pressed, so that the strength of the cast-in-place sleeper is improved; after the concrete is initially set, the sleeper top template 6 and the two anchor bolts 10 are not removed, so that the integrity of the cast-in-place sleeper is effectively ensured;
(4) After all cast-in-place sleepers are poured, dismantling original sleeper fasteners 2 within the range of 50m, installing compression type rail shock absorber fasteners on newly poured sleepers, and enabling the fasteners to follow the slope forwards and backwards again; after the fastener is installed and disassembled, the geometric state of the line is checked and confirmed again to ensure that the geometric state of the line is within an allowable range;
(5) the surface of the original sleeper and the railway bed are chiseled, sundries such as concrete residues and the like are cleaned up, reinforcing steel bars are bound section by section, a template is erected, and concrete is poured to restore the whole railway bed, namely, under the condition that the original sleeper 3 is not dismounted, the original sleeper 3 is used as a part of a new whole railway bed after the concrete is poured on the original sleeper 3, and the requirement of the surface height difference between a cast-in-place sleeper and the railway bed is met.
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 for transforming an integral ballast bed of an operation line is characterized by comprising the following steps: the method specifically comprises the following steps:
(1) and (3) rechecking the existing rail surface measurement:
The method comprises the steps that a total station is utilized to accurately measure the rail surface elevation, the measured current rail surface elevation H1 is compared with the reformed design rail surface elevation H2, the lifting amount H of a steel rail is calculated to be H2-H1, a new sleeper is installed between two adjacent original sleepers, the structural height of a fastener on the new sleeper is H3, an operation space with the height of H4 is reserved due to on-site formwork erection construction, when the new sleeper is installed, the padding height H of the original sleeper is H-H3+ H4 to be H- (H3-H4), and the reserved height H4 is smaller than the structural height H3 of the fastener on the new sleeper;
(2) adjusting the rail surface and the rail bottom slope:
when a new sleeper is installed, an iron base plate with the height of h is installed below an original sleeper fastener, then the thickness of a wedge-shaped rubber pad required by adjusting a rail base slope at each original sleeper is calculated, and then the wedge-shaped rubber pads with corresponding thicknesses are selected to be installed below a steel rail and on the original sleeper fastener, so that the adjustment of the rail base slope is realized;
(3) and a new cast-in-place sleeper:
firstly chiseling off a ballast bed part between two adjacent original sleepers, wherein the chiseling-off depth is based on exposing upper-layer steel bars of the ballast bed, then planting bars according to a designed position, installing a steel bar cage of a new sleeper, and binding and connecting the planted bars with the steel bar cage of the new sleeper; finally, a special template for the cast-in-place sleeper is arranged outside a reinforcement cage of the new sleeper and below the steel rail, and finally, ultra-fast-hardening self-compacting concrete is mixed and the new sleeper is poured;
(4) And replacing the fastener:
after all the new sleepers are poured, removing the fasteners on the original sleepers, installing new fasteners on the new sleepers, and then, moving the sleepers forward and backward again;
(5) and recovering the integral ballast bed:
the method comprises the steps of roughening and cleaning the surfaces of an original sleeper and a track bed, binding reinforcing steel bars section by section, erecting a template and pouring concrete to restore the whole track bed, namely, under the condition that the original sleeper is not dismounted, pouring concrete on the original sleeper to be used as a part of a new whole track bed, and meeting the requirement of the surface height difference of a cast-in-place sleeper and the track bed.
2. The method for reconstructing and constructing the integral ballast bed of the service line according to claim 1, wherein the method comprises the following steps: in the step (2), the iron base plate with the height of h is installed under the original sleeper fastener, and meanwhile, the front and rear track bed sections are subjected to down slope.
3. The method for reconstructing and constructing the integral ballast bed of the service line according to claim 1, wherein the method comprises the following steps: in the step (2), after the rail bottom slope is adjusted, the rail bottom slope measuring instrument is used for rechecking the rail bottom slope reaching the standard, and the error range of the rail bottom slope adjustment is 1/50-1/30.
4. The method for reconstructing and constructing the integral ballast bed of the service line according to claim 1, wherein the method comprises the following steps: the reinforcement cage of the new sleeper is prefabricated and molded and then is taken to a construction site for installation.
5. The method for reconstructing and constructing the integral ballast bed of the service line according to claim 1, wherein the method comprises the following steps: the steel bars in the step (3) are phi 12 deformed steel bars, the steel bars are implanted into the conventional ballast bed by 110-130mm, and the extending length is not less than 40mm according to the thickness of the protective layer.
6. The method for reconstructing and constructing the integral ballast bed of the service line according to claim 1, wherein the method comprises the following steps: in the step (3), the concrete steps of installing the cast-in-place sleeper special template are as follows:
a. firstly, placing a support rubber mat on a sleeper top template, penetrating the sleeper top template and the support rubber mat from the bottom of a steel rail, and enabling the steel rail to penetrate between two strip-shaped limiting blocks on the sleeper top template, and then temporarily supporting and positioning the sleeper top template;
b. positioning two nylon sleeves under two bolt through holes of a sleeper top template, penetrating two anchoring bolts through the two bolt through holes on the sleeper top template, and connecting the two anchoring bolts with corresponding nylon sleeves in a threaded manner, so that the top ends of the nylon sleeves are tightly contacted with the lower end surface of the sleeper top template, and the heads of the anchoring bolts are tightly attached to the upper end surface of the sleeper top template;
c. connecting the bottom ends of the two hanging die tie bars to the two anchor bolts, sleeving the through holes on the hanging die cross bar on the two hanging die tie bars, supporting the hanging die cross bar on the top surface of the steel rail, screwing the locking nuts on the two hanging die tie bars, driving the sleeper top template to move upwards by the two hanging die tie bars to extrude the steel rail, clamping the steel rail between the sleeper top template and the hanging die cross bar, namely hoisting the sleeper top template on the steel rail, and finally clamping the two L-shaped rail distance blocks between the rail bottom of the steel rail and the corresponding strip-shaped limiting blocks, wherein the setting of the cast-in-place sleeper rail bottom slope is finished;
d. And (4) placing the sleeper sideform below the sleeper top form and closing the sleeper sideform and the sleeper top form.
7. The method for reconstructing and constructing the integral ballast bed of the service line according to claim 6, wherein the method comprises the following steps: in the step (3), the concrete steps of mixing the ultra-fast-hardening self-compacting concrete and pouring a new sleeper are as follows: pouring concrete from a pouring hole on the side with the higher gradient of the sleeper, wherein the sleeper top template and the sleeper side template are tightly closed, mortar is poured from top to bottom, and air bubbles are discharged from a reserved exhaust hole; when concrete pouring is completed, the concrete overflows the exhaust holes on the lower side of the sleeper slope, then an iron hammer is used for knocking the sleeper top template to discharge gas from the exhaust holes, and the concrete and the sleeper top template are compact and free of bubbles.
8. The method for reconstructing and constructing the integral ballast bed of the service line according to claim 1, wherein the method comprises the following steps: in the step (4), the whole track bed is equally divided into a plurality of replacement areas according to the axial direction of the track, firstly, all fasteners on the original sleepers in each replacement area are removed, new fasteners are installed on all new sleepers in the replacement areas, the slope is followed forward and backward again, and the upper step is repeated until all the new fasteners in all the replacement areas of the whole track bed are completely replaced and removed.
9. The method for reconstructing and constructing the integral ballast bed of the service line according to claim 8, wherein the method comprises the following steps: in the step (4), after all the new and old fasteners on the whole track bed are replaced, installed and disassembled, the geometric state of the line is checked and confirmed again, and the geometric state of the line is ensured to be within an allowable range.
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| CN202210411109.9A CN114753190B (en) | 2022-04-19 | 2022-04-19 | Construction method for improving integral ballast bed of operation line |
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2022
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| JPH09151408A (en) * | 1995-11-22 | 1997-06-10 | Mitsubishi Heavy Ind Ltd | Bridge sleeper change system |
| CN1837476A (en) * | 2005-03-26 | 2006-09-27 | 普夫莱德雷尔基础设施技术有限及两合公司 | Fixed track road height correction method and fixed track road |
| CN207998757U (en) * | 2018-02-08 | 2018-10-23 | 中铁上海工程局集团有限公司 | It is a kind of for subway route changeover portion solid concrete roabed sink processing without pillow formula track structure |
| CN111733639A (en) * | 2020-06-23 | 2020-10-02 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Method for replacing damaged sleeper of ballastless track |
| CN111663385A (en) * | 2020-06-24 | 2020-09-15 | 中铁二院工程集团有限责任公司 | Construction method for completing rapid restoration of settlement of integral ballast bed in skylight period |
| CN111827022A (en) * | 2020-07-09 | 2020-10-27 | 武汉比邻工程技术有限公司 | Quick maintenance method for double-block ballastless track |
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