CN110700023A - Steel spring floating plate integral ballast bed construction method based on rail engineering - Google Patents

Steel spring floating plate integral ballast bed construction method based on rail engineering Download PDF

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Publication number
CN110700023A
CN110700023A CN201910980097.XA CN201910980097A CN110700023A CN 110700023 A CN110700023 A CN 110700023A CN 201910980097 A CN201910980097 A CN 201910980097A CN 110700023 A CN110700023 A CN 110700023A
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CN
China
Prior art keywords
floating slab
steel
reinforcement cage
rail
ballast bed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910980097.XA
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Chinese (zh)
Inventor
许金峰
陈志远
卫海津
汪六如
王英磊
韩小波
赵勇
白林
徐赞
杨发滔
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China Tiesiju Civil Engineering Group Co Ltd CTCE Group
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China Tiesiju Civil Engineering Group Co Ltd CTCE Group
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Application filed by China Tiesiju Civil Engineering Group Co Ltd CTCE Group filed Critical China Tiesiju Civil Engineering Group Co Ltd CTCE Group
Priority to CN201910980097.XA priority Critical patent/CN110700023A/en
Publication of CN110700023A publication Critical patent/CN110700023A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01BPERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B19/00Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01BPERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00Fastening rails on sleepers, or the like
    • E01B9/68Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair

Abstract

The invention discloses a construction method of a steel spring floating slab integral ballast bed based on track engineering, which comprises the following steps: s1, mounting the walking rails in the tunnel, and pouring a supporting base body at the bottom of the tunnel; s2, manufacturing a floating slab reinforcement cage, arranging vibration isolator assemblies on the reinforcement cage at intervals, and fixing a steel rail on the top of the reinforcement cage; s3, laying an isolation layer on the supporting base body, placing the floating slab reinforcement cage on the isolation layer, calibrating, and then pouring concrete to form a track bed; and S4, lifting the ballast bed to the design height through the vibration isolator assembly after the ballast bed reaches the design strength. The beneficial effects of the above technical scheme are: adopt prefabricated mode preparation steel reinforcement cage can select the operation on the ground that the operation space is bigger, can make simultaneously in batches, can improve the operating efficiency, and can carry out the jacking after the railway roadbed is pour and is accomplished for the railway roadbed has certain elasticity, can absorb the impact force that the vehicle produced at the operation in-process, extends orbital life.

Description

Steel spring floating plate integral ballast bed construction method based on rail engineering
Technical Field
The invention relates to the technical field of rail engineering, in particular to a construction method of a steel spring floating slab integral ballast bed based on rail engineering.
Background
The track bed is an important component of the track and is the foundation of the track frame, so the overall quality of the track bed influences the quality of the track; the existing track bed comprises a common ballast track bed, an asphalt track bed and a concrete integral track bed, wherein the concrete integral track bed has good integrity and high cleanliness, but the elasticity of a track is difficult to ensure.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a construction method of a steel spring floating slab integral ballast bed based on track engineering, which has high construction efficiency and good elasticity.
The invention provides a construction method of a steel spring floating slab integral ballast bed based on track engineering, which comprises the following steps:
s1, constructing a tunnel support matrix; mounting walking rails at the positions, close to the bottom ends, of the two side walls of the tunnel, and pouring a supporting base body at the bottom of the tunnel;
s2, prefabricating a floating slab reinforcement cage; manufacturing a floating slab reinforcement cage which is adaptive to the size of the supporting base body according to the size of the supporting base body, arranging vibration isolator assemblies on the reinforcement cage at intervals, and fixing a steel rail on the top of the floating slab reinforcement cage through a short sleeper;
s3, pouring a ballast bed; laying an isolation layer on a support base body, placing a floating slab reinforcement cage on the isolation layer, calibrating, and then pouring concrete to form a track bed to ensure that a sleeper of a steel rail is just immersed in the concrete;
s4, jacking; and lifting the ballast bed to the design height through a hydraulic jack in the vibration isolator assembly after the ballast bed reaches the design strength.
The beneficial effects of the above technical scheme are: adopt prefabricated mode preparation steel reinforcement cage can select the operation on the ground that the operation space is bigger for operation personnel's operating condition is better, and can make simultaneously in batches, can improve the operating efficiency, and can carry out the jacking after the railway roadbed pours the completion, makes the railway roadbed have certain elasticity, can absorb the impact force that the vehicle produced at the operation in-process, improves orbital bearing capacity, extends orbital life.
Further, a drainage ditch is arranged in the middle of the support base body. The escape canal is used for draining accumulated water in the tunnel, and the stability of the track bed structure and the safety of driving are guaranteed.
Further, in step S1, before the support base is poured, the reinforcing steel bars are tied to the bottom of the tunnel to form the shape of the support base, and drainage ditches are left in the tied reinforcing steel bars.
Furthermore, the cross section of the floating slab reinforcement cage is in an inverted isosceles trapezoid shape.
Further, the length of the short sleeper is 2-4 times of the width of the bottom of a single steel rail.
Further, after the preparation of floating slab steel reinforcement cage was accomplished, the interval set up a plurality of hoisting points on the rail, and a plurality of hoisting points evenly distributed are on the rail, and lifting device transports the tunnel to transport vehicle through fixing the floating slab steel reinforcement cage at the hoisting point. The floating slab reinforcement cage is more uniformly stressed and is not easy to deform.
Further, still set up the stopper that is used for injecing the floating slab steel reinforcement cage position in the tunnel, the bottom of stopper is provided with the connecting piece, through on the connecting piece is fixed in the isolation layer with the stopper is firm, the stopper is provided with the inclined plane towards the one end of floating slab steel reinforcement cage, the angle of inclination on inclined plane is the same with the angle of floating slab steel reinforcement cage both sides.
Further, the vibration isolator assembly includes an outer cylinder on which a cover is detachably provided, the cover being maintained not to be covered with concrete at the time of concrete casting at step S3. The cover is convenient to lift the ballast bed at the later stage.
Further, the step S3 includes pouring a boss, where the boss is located between two steel rails, and when the ballast bed solidifies to reach the designed strength, a steel formwork is fixed between the two rails, and the height of the formwork is the same as the height of the boss to be poured. The steel template is not easy to deform and pouring is more accurate.
Further, the sealing strip is all installed in the gap between the gap of railway roadbed and tunnel inner wall and between the adjacent railway roadbed, the sealing strip compresses tightly and dies through the screw lock through the billet that punches. And impurities are prevented from entering a gap between the raised ballast bed and the supporting base body.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a cross-section of a tunnel in an embodiment of the present invention;
FIG. 2 is an enlarged schematic view at A in FIG. 1;
FIG. 3 is a top view of the installation of a rail in an embodiment of the present invention;
fig. 4 is a schematic structural view of the vibration isolating core body in the embodiment of the present invention.
Reference numerals: the vibration isolation base comprises a support base body 100, a drainage ditch 110, a track bed 200, a sealing strip 300, an outer cylinder body 400, a cover 410, a vibration isolation core body 420, a spring 421, a steel rail 500 and a short sleeper 510.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media.
As shown in fig. 1 to 4, the embodiment provides a method for constructing an integral ballast bed of a steel spring floating slab based on track engineering, which includes the following steps:
s1, constructing a tunnel foundation surface; mounting walking rails at the positions, close to the bottom ends, of the two side walls of the tunnel, and pouring a supporting base body 100 at the bottom of the tunnel; the support base 100 is provided with expansion joint templates at intervals.
S2, prefabricating a floating slab reinforcement cage; manufacturing a floating slab reinforcement cage which is adaptive to the size of the supporting base 100 according to the size of the supporting base, arranging vibration isolator assemblies on the reinforcement cage at intervals, and fixing a steel rail 500 on the top of the floating slab reinforcement cage through a short sleeper 510;
s3, pouring the ballast bed 200; laying an isolation layer on the support base 100, placing the floating slab reinforcement cage on the isolation layer, calibrating, and then pouring concrete to form a track bed 200, so as to ensure that a sleeper of the steel rail 500 is just immersed in the concrete;
s4, jacking; after the ballast bed 200 reaches the design strength, the ballast bed 200 is lifted to the design height by the hydraulic jacks in the vibration isolator assemblies.
The beneficial effects of the above technical scheme are: adopt prefabricated mode preparation steel reinforcement cage can select the operation on the ground that the operation space is bigger for operation personnel's operating condition is better, and can make simultaneously in batches, can improve the operating efficiency, and can carry out the jacking after ballast bed 200 pours and accomplish, makes ballast bed 200 have certain elasticity, can absorb the impact force that the vehicle produced at the operation in-process, improves orbital bearing capacity, extends orbital life.
A drainage ditch 110 is further provided in the middle of the support base 100. The drainage ditch 110 is used for draining accumulated water in the tunnel, and ensures the stability of the track bed 200 structure and the safety of driving. In step S1, before the support base 100 is poured, the reinforcing bars are tied to the bottom of the tunnel in the shape of the support base 100, and the drainage ditches 110 are left in the tied reinforcing bars. Specifically, according to the design drawing, when the supporting base body 100 is constructed, the HRB400 steel bars and the C40 concrete are adopted, the thickness of the protective layer on the upper surface of the concrete is 40mm, and the rest is 30 mm. The elevation of the top surface of the supporting base body 100 is controlled by a string, the top surface of the supporting base body 100 after being leveled is retested, the allowable deviation is controlled within the range of-5-0 mm, the surface evenness is controlled within the range of 2 mm/square meter, and the allowable deviation of the elevation of the bottom of the ditch is controlled within the range of 3 mm/m. The parts which do not meet the requirements are treated correspondingly.
The concrete of support base member 100 is poured one shot forming, and need vibrate closely, and the vibrating rod will insert slowly soon and carry, should regard as concrete face not continue to sink, the surface begins to be starched and no bubble spills over, and the horizontal vibrating rod that drags is forbidden strictly. In the concrete pouring process, the ditch template is observed at any time to prevent the template from moving transversely or floating upwards.
The linear section adopts a flat substrate, the width of the drainage ditch 110 is 300mm, the height of the drainage ditch is 150mm, and the central line of the drainage ditch 110 is superposed with the central line of the line; the curved section adopts an inclined substrate, namely, the substrate surface is always parallel to the transverse connecting line of the top surfaces of the two steel rails 500 in the transverse direction, and the inclination angle is consistent with the superelevation. In the section of the gentle curve, the inclination angle of the substrate gradually changes along with the superelevation.
After the construction of the supporting base body 100 concrete is finished, retest inspection is carried out on the surface elevation of the base concrete according to the design requirement, and the part higher than the design requirement is polished.
The cross section of the floating slab reinforcement cage is in an inverted isosceles trapezoid shape.
The length of the short ties 510 is 2-4 times the width of the bottom of a single rail 500. Four studs are arranged at the lower end of the short sleeper 510, and the studs and the steel bars are tied together when the steel bar cage is manufactured, so that the stability of the short sleeper 510 during pouring is improved.
In order to ensure the isolation effect of the isolation layer, the isolation layer is made of transparent plastic cloth with the thickness not less than 1mm, the surface of the supporting base body 100 and the drainage ditch 110 are cleaned before laying, then the isolation layer is laid on the floating slab reinforcement cage and the side wall of the tunnel, so that concrete is prevented from being bonded with the supporting base body 100 and the tunnel structure when the track bed 200 is poured, and the track bed 200 is easy to structurally damage when the floating slab track bed 200 is jacked. Furthermore, the seams of the isolation layers should be tight, so that the track bed 200 concrete and the base concrete cannot be bonded due to disconnection, the isolation layers need to be protected by special attention in the construction process, damage is avoided, and the asbestos plates are additionally arranged below the welding positions in the steel bar welding process to prevent welding slag from burning the isolation layers. In order to prevent the isolation layer from sliding in the construction process, the isolation layer can be nailed on the tunnel pipe sheet by using a 3cm cement nail.
The floating slab reinforcement cages should be manufactured in sections because the ballast beds 200 are arranged in sections, and shear hinges are arranged between the ballast beds 200 in each section. The floating slab reinforcement cage is constructed by adopting a prefabricated keel method, namely, the reinforcement cage is bound on a track laying base, a rail car is transported to a construction operation surface, and a subway track laying car is used for laying and adjusting on site.
The method specifically comprises the following steps:
⑴ construction of reinforcement cage binding and storage stations, namely arranging the floating slab reinforcement cage binding stations in a 500-steel rail production base, setting the stations in the 500-steel rail gantry crane operation range for convenient lifting of reinforcement cages, hardening the stations by C20 concrete, requiring the stations to be flat and have no water accumulation, setting 2 reinforcement binding stations of 4m multiplied by 30m for ensuring the production requirement, and setting 2 storage stations in the field for convenient storage of reinforcement cages so as to meet the flow construction operation.
⑵ the steel rail 500 is erected, because there are more steel bars, in order to bind the steel rail 500 and the reinforcement cage together, the method of erecting and positioning the steel rail 500 before the reinforcement cage is bound is adopted, the steel rail 500 is supported by a special support frame, the cross beam of the support frame should not invade the surface of the roadbed 200, and has enough rigidity to ensure the maintenance of the track state during the construction, the fasteners of the steel rail 500 are all installed in place, and the subsequent work such as the binding of the steel bars can be carried out after the construction acceptance of the steel rail 500 and the fasteners is passed.
⑶ placing vibration isolator outer sleeves, in order to ensure the accurate positioning of the outer cylinder 400, the position of the outer cylinder 400 is determined by paying off, the position of each outer cylinder 400 is drawn on the floor in the reinforcement cage binding field, the outer cylinder 400 is put in place according to the position, then reinforcement cage binding operation is carried out, reinforcement binding around the outer cylinder 400 is reinforced, and the lifting lugs and the structural reinforcements of the outer cylinder 400 are firmly bound.
⑷ Steel bar cage binding, which is to bind steel bar cages strictly according to the design drawing requirements, the lapping length of the steel bar binding is not less than 50 times the diameter of the steel bar, the number of the lapping joints of the steel bar in the same lapping joint range cannot exceed 50% of the number of the longitudinal steel bar, 2 longitudinal through steel bars are respectively selected and welded with all the transverse steel bars near the lower part of each steel rail 500 in each slab block according to the design requirements, 1 transverse steel bar is selected and welded with all the transverse steel bars in each slab block every 5m, 1 galvanized flat steel of 50mm multiplied by 5mm is respectively adopted and welded with all the longitudinal steel bars at the two ends of each ballast bed 200, and connecting terminals are welded and led out at the two sides of the ballast bed 200 and embedded stray terminals.
After the floating slab reinforcement cage is manufactured, a plurality of hoisting points are arranged on the steel rail 500 at intervals, the hoisting points are uniformly distributed on the steel rail 500, and hoisting equipment transfers the floating slab reinforcement cage to a transport vehicle to be transported to a tunnel through being fixed on the hoisting points. The floating slab reinforcement cage is more uniformly stressed and is not easy to deform. For example, 2 pairs of lifting points of a 25 meter long reinforcement cage should be located 5.5 meters from each end. The steel reinforcement cage must set up between steel reinforcement cage and the flatbed and turn to the device in the rail car transportation, prevents that the flatbed from leading to the steel reinforcement cage to take place to warp through curve section.
Still set up the stopper that is used for injecing floating slab steel reinforcement cage position in the tunnel, the bottom of stopper is provided with the connecting piece, through on the connecting piece is fixed in the isolation layer with the stopper is firm, the stopper is provided with the inclined plane towards the one end of floating slab steel reinforcement cage, the angle of inclination on inclined plane is the same with the angle of floating slab steel reinforcement cage both sides.
The vibration isolator assembly includes an outer cylinder 400, and a cover 410 is detachably provided on the outer cylinder 400, and the cover 410 should be maintained not to be covered with concrete when the concrete is poured in the step S3. The lid 410 is convenient for later lifting of the ballast bed 200. The vibration isolator subassembly still includes vibration isolation core body 420, vibration isolation core body 420 includes a spring 421, spring 421 plays shock attenuation isolation effect, vibration isolation core body 420 can arrange in outer barrel 400, pours at railway roadbed 200 and accomplishes the back, and outer barrel 400 forms a whole with railway roadbed 200, and when the jacking, open lid 410, processing vibration isolation core body 420 puts into outer barrel 400 in, and the going up of outer barrel 400 is provided with three towards the bellied fender edge in center, vibration isolation core body 420's upper portion also be provided with keep off along assorted supporter, increase the supporter through external force and keep off the interval between the edge and fill in the supporting pad and can carry out the lifting to railway roadbed 200. Sealing strip 300 is all installed in the gap between the gap of railway roadbed 200 and tunnel inner wall and the gap between the adjacent railway roadbed 200, sealing strip 300 compresses tightly and dies through the screw lock through the billet that punches. Foreign materials are prevented from entering the gap between the raised ballast bed 200 and the support base 100.
Specifically, after the concrete is poured for 28 days and the design strength is reached, the track bed 200 is lifted from the support base 100 by a special hydraulic jack designed and provided by a manufacturer, and the allowable error is +/-1 mm. The method comprises the following steps:
⑴ cleaning the site, removing all templates and garbage before jacking, and finishing the installation of the sealing strip 300 to ensure that other impurities can not enter the bottom of the ballast bed 200 after the ballast bed 200 enters the working state, and the pressed steel bars should be galvanized for corrosion protection.
⑵, the measurement points are set so that at least 8 measurement points are disposed on each track bed 200 in order to measure the uniform deformation of the track bed 200, and the level of the track bed 200 is measured.
⑶ removing the isolating layer inside the outer cylinder 400, opening the cover 410 on the outer cylinder 400, checking whether the inside of the outer cylinder 400 is clean, and cutting off the isolating layer visible from the bottom of the outer cylinder 400.
⑷ installing horizontal limit pin, drilling hole at the center of the bottom of the outer cylinder 400 needed to install the fixed pin according to the design requirement, pressing in the limit pin.
vibration isolation body 420 is installed by placing vibration isolation body 420 in outer cylinder 400 until it is seated on support base 100 by using installation rods, there is enough clearance between the top of vibration isolation body 420 and the rim of outer cylinder 400, rotating vibration isolation body 420 so that three corners of the triangular support body are opposed to the rim of outer cylinder 400, and then removing the installation rods.
⑹ pressing in the leveling steel plate, firstly putting in the annular leveling steel plate, then putting in the hydraulic jack, the hydraulic plunger of the jack can pass through the leveling steel plate and directly support the vibration isolation core body 420, using the hydraulic plunger of the hydraulic jack on the vibration isolation core body 420 to support the top of the vibration isolation core body 420 until 3 claws support the outer edge of the outer cylinder body 400, starting the jack to lift the ballast bed 200 by the acting force between the vibration isolation core body 420 and the outer edge of the outer cylinder body 400, then rotating the leveling steel plate to enable the stress convex edge of the leveling steel plate to be positioned between the outer edge and the supporting body, finally releasing the pressure of the hydraulic jack to enable the lifted ballast bed 200 to fall on the leveling steel plate, and removing the hydraulic jack to complete the one-time lifting of the ballast bed 200.
⑺ leveling steel plates are pressed in for multiple times, considering the stress of the track bed 200, the track bed 200 is jacked by 3 to 4 steps at least, each track bed 200 is divided into three to four wheels, the first wheel jacking of each plate of a single line is completed sequentially according to the laying sequence of the track bed 200, then the second wheel jacking is performed from the last to the first track bed 200, the three to four wheels jacking of the single line is completed in a reciprocating mode, the designed jacking height is reached finally, and the jacking height of each step is controlled through the thickness of the placed leveling steel plates.
⑻, measuring the jacking height, after jacking, finally measuring the jacking height of the track bed 200, checking whether the design requirement is met, and recording the measurement result in the case.
⑼ foreign matters are prevented from entering, the raised ballast bed 200 needs to pay attention to the protection of finished products, and other liquids such as water are prevented from entering the outer cylinder 400 in the construction stage.
⑽ height adjustment, if the track height changes due to the uneven settlement of the tunnel, the height adjustment of the track bed 200 is required, and the height of the track bed 200 can be adjusted according to the settlement amount.
⑾ the final work of the jacking process, after the vibration isolator assembly is installed and the design requirement is met, a safety plate is placed on the leveling steel plate, the safety plate, the leveling steel plate and the vibration isolation core body 420 are connected together through bolts to prevent the leveling steel plate from moving, the safety plate is fixed by the bolts to ensure reliable force transmission, and finally the cover 410 of the outer cylinder 400 is covered to prevent the inner part from being damaged and impurities from entering.
And the step S3 further comprises the step of pouring a boss, wherein the boss is positioned between the two steel rails 500, when the ballast bed 200 is solidified to reach the designed strength, a steel template is fixed between the two rails, and the height of the template is consistent with that of the boss to be poured. The steel template is not easy to deform and pouring is more accurate.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (10)

1. A construction method of a steel spring floating slab integral ballast bed based on track engineering is characterized by comprising the following steps:
s1, construction of a tunnel support base body: mounting walking rails at the positions, close to the bottom ends, of the two side walls of the tunnel, and pouring a supporting base body (100) at the bottom of the tunnel;
s2, prefabricating a floating slab reinforcement cage: manufacturing a floating slab reinforcement cage which is adaptive to the size of a supporting base body (100) according to the size of the supporting base body, arranging vibration isolator assemblies on the reinforcement cage at intervals, and fixing a steel rail (500) on the top of the floating slab reinforcement cage through a short sleeper (510);
s3, pouring a ballast bed: laying an isolation layer on a support base body (100), placing a floating slab reinforcement cage on the isolation layer, calibrating, and then pouring concrete to form a track bed (200) to ensure that a sleeper of a steel rail (500) is just immersed in the concrete;
s4, jacking: and after the ballast bed (200) reaches the design strength, lifting the ballast bed (200) to the design height by using a hydraulic jack and carrying out elastic support through the vibration isolator assembly.
2. The rail-work-based steel spring floating slab monolithic roadbed construction method according to the claim 1, characterized in that a drainage ditch (110) is further arranged in the middle of the support matrix (100).
3. The method for constructing the integral ballast bed of the steel spring floating slab based on the rail work according to claim 2, wherein the steel bars are tied to the bottom of the tunnel to form the shape of the supporting substrate (100) and the drainage ditches (110) are left in the tied steel bars before the pouring of the supporting substrate (100) in the step S1.
4. The method for constructing the integral ballast bed of the steel spring floating slab based on the rail engineering as claimed in claim 1, wherein the cross section of the steel reinforcement cage of the floating slab is in an inverted isosceles trapezoid shape.
5. The method for constructing the integral track bed of the steel spring floating slab based on the rail engineering as claimed in claim 1, wherein the length of the short sleeper (510) is 2-4 times of the width of the bottom of a single steel rail (500).
6. The construction method of the steel spring floating slab integral track bed based on the rail engineering as claimed in claim 1, wherein after the floating slab reinforcement cage is manufactured, a plurality of hoisting points are arranged on the steel rail (500) at intervals, the plurality of hoisting points are uniformly distributed on the steel rail (500), and the hoisting equipment transfers the floating slab reinforcement cage to a transport vehicle to be transported to the tunnel through being fixed on the hoisting points.
7. The construction method of the steel spring floating slab integral ballast bed based on the rail engineering as claimed in claim 1, wherein a limiting block for limiting the position of the floating slab reinforcement cage is further arranged in the tunnel, a connecting piece is arranged at the bottom end of the limiting block, the limiting block is firmly fixed on the isolation layer through the connecting piece, an inclined plane is arranged at one end of the limiting block facing the floating slab reinforcement cage, and the inclined plane has the same angle as the two sides of the floating slab reinforcement cage.
8. The rail-work-based steel spring floating slab integral ballast construction method according to claim 1, wherein the vibration isolator assembly comprises an outer cylinder (400), a cover (410) is detachably provided on the outer cylinder (400), and the cover (410) is maintained not to be covered with concrete at the concrete casting of the step S3.
9. The method for constructing the integral steel spring floating slab track bed based on the rail engineering as claimed in claim 1, wherein the step S3 further comprises casting a boss, the boss is located between two steel rails (500), when the track bed (200) is solidified to reach the designed strength, a steel formwork is fixed between the two rails, and the height of the formwork is consistent with that of the boss to be cast.
10. The method for constructing the integral ballast bed of the steel spring floating slab based on the rail engineering as claimed in claim 1, wherein sealing strips (300) are respectively installed in gaps between the ballast bed (200) and the inner wall of the tunnel and between adjacent ballast beds (200), and the sealing strips (300) are compressed by perforated steel bars and locked by screws.
CN201910980097.XA 2019-10-15 2019-10-15 Steel spring floating plate integral ballast bed construction method based on rail engineering Pending CN110700023A (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN111794782A (en) * 2020-07-08 2020-10-20 广州地铁设计研究院股份有限公司 Tunnel track ballast bed water-drainage preventing structure and construction method thereof
CN113089387A (en) * 2021-04-01 2021-07-09 周允桂 Integral damping device for rail transit
CN113756139A (en) * 2021-07-16 2021-12-07 重庆科技学院 Prefabricated railway roadbed of combination suitable for railway tunnel vibration/noise reduction

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