CN105714619A - Construction method of plate type ballast-free bed structure - Google Patents
Construction method of plate type ballast-free bed structure Download PDFInfo
- Publication number
- CN105714619A CN105714619A CN201610249434.4A CN201610249434A CN105714619A CN 105714619 A CN105714619 A CN 105714619A CN 201610249434 A CN201610249434 A CN 201610249434A CN 105714619 A CN105714619 A CN 105714619A
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- concrete
- track plates
- construction method
- pressure injection
- plate
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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
Abstract
The invention provides a construction method of a plate type ballast-free bed structure. The construction method is characterized by at least comprising the following steps: constructing concrete bases on a roadbed, paving isolating layers on the concrete bases, arranging convex baffle platforms on the concrete base, and enabling the convex baffle platforms to penetrate through the isolating layers; paving a track plate between the convex baffle platforms of the adjacent concrete bases, and at least forming multiple vent holes and pressure injection holes in the track plate; fixedly arranging a concrete pressure injection layer template on the side of the track plate; and pressurizing and injecting concrete into the pressure injection holes of the track plate to enable the concrete to form a concrete pressure injection layer in the concrete pressure injection layer template, wherein the concrete pressure injection layer is located above the isolating layers. The construction method has the advantages that air can be effectively vented when the concrete pressure injection layer is injected, and the friction force between the track plate and the concrete pressure injection layer is increased.
Description
Technical field
The present invention relates to high speed railway construction middle orbit plate laying construction technology, be specifically related to the construction method of a kind of plate-type ballastless ballast bed structure, belong to plate-type ballastless railway roadbed laying construction technical field.
Background technology
Current non-fragment orbit is as the track structure pattern that developed country's high-speed railway is main, the slab track etc. mainly having the Bo Ge of Germany, radar and Japan of representative platy ballastless track structure.China's non-fragment orbit is frequently with self-compacting concrete as filling bed, and its track plates adopts steam vent mode of gathering to be exhausted, and this technique exists following 4 deficiencies.
First, self-compacting concrete mobility is wayward；Second, adopt self-compacting concrete to construct filling bed, be difficult to differentiate concrete filling state, be generally adopted concrete amount at present to control filling, pass judgment on accuracy relatively low, often lead to last also need and adopt slip casting to repair；3rd, be typically at present in track plates gather steam vent be exhausted, but switching turnout plate area is bigger, ventilation aperture area ratio is extremely low, in addition adopt concrete gravity power carry out filling, pressure is less, with contact site 0, track plates bottom surface pressure, or be not in contact with, it is easy to cause that the position gas between steam vent cannot be discharged. at all；4th, self-compacting concrete pours into and must assure that continuously, just can have at a slow speed good filling effect, and speed of application is slow.
Above reason is all easily caused concrete filling leakiness, intensity of filling bed is relatively low, it is easily caused track plates lower space to grow, when train passes through, the easy stress in growth position, switching turnout plate space is concentrated, the phenomenons such as track plates gap, wing song and packed layer cracking occur, affect track plates service life, cause track plates lesion ruptures under serious conditions, directly cause security incident.
It is generally adopted at present after filling completes and is detected, it has been found that have position, bigger space to adopt slip casting to repair, affect construction quality, incur loss through delay the construction period, waste a large amount of human and material resources, financial resources.
Summary of the invention
It is an object of the invention to according to above-mentioned the deficiencies in the prior art, the construction method of a kind of plate-type ballastless ballast bed structure is provided, by offering steam vent and pressure injection hole on track plates, concrete pressurization is injected in addition, it is possible to when effective guarantee concrete injects, air is effectively discharged.
The object of the invention realizes being completed by techniques below scheme:
A kind of construction method of plate-type ballastless ballast bed structure, described plate-type ballastless ballast bed structure is arranged on roadbed, it is characterised in that: described construction method at least comprises the following steps:
Construction concrete bed on described roadbed, lays sealing coat on described concrete bed, arranges convex gear platform on described concrete bed, makes the described convex gear platform described sealing coat of traverse；
Described convex at adjacent two concrete beds keeps off laid rail guidance tape between platform, at least offers some steam vents and some pressure injection holes on described track plates；
Side fixed and arranged concrete press-casting layer template at described track plates；
In the described pressure injection hole of described track plates, pressurization injection concrete makes concrete molding in described concrete press-casting layer template constitute concrete press-casting layer, and described concrete press-casting layer is positioned at above described sealing coat.
After described track slab pavement completes, fixedly mounting fastener and rail on its surface, being mounted by of described fastener realizes at the fastener hole of track plates surface programming, and described rail is fixedly mounted on described fastener.
In described concrete pressurization injection process, when height at the bottom of the described concrete height in described concrete press-casting layer template is not less than the plate of described track plates, stop injecting described concrete.
Before described concrete pressurization injection process, lay the reinforcing bar of described concrete press-casting layer on the top of sealing coat.
Some described steam vents and some described pressure injection holes are preset on described track plates respectively, and offer crisscross some aerofluxus ditches bottom described track plates, and described aerofluxus ditch is connected with described steam vent.
The invention have the advantage that first, used concrete flowability requires lower than self-compacting concrete, it is easy to configuration；Second, adopt pressurization to inject concrete and construct filling bed, one side can adopt injection rate to inject state to grasp concrete, takes the outer shifting method of template can grasp concrete injection situation in real time either directly through observing peripheral concrete height on the other hand；3rd, track plates lower exhaust ditch connects with steam vent, and concrete pressurization is injected in addition, it is possible to when effective guarantee concrete injects, air is effectively discharged；4th, concrete injects finally can fill whole aerofluxus ditch and steam vent, further increases the frictional force between track plates and concrete press-casting layer；5th, concrete press-casting layer adopts grouting under pressure mode, can not only improve concrete press-casting speed of application, additionally it is possible to ensure that concrete filling is closely knit, effectively prevent track plates because filling bed space is grown unbalance stress, occur that track plates gap, wing be bent and the phenomenon such as packed layer cracking；6th, pressurization injection can improve intensity after concrete setting, and concrete bed, concrete press-casting layer, precast track plate are formed monocoque structure, improves stability and the service life of railway roadbed greatly.
Accompanying drawing explanation
Fig. 1 is the site plan of the present invention；
Fig. 2 is I-I profile in Fig. 1.
Detailed description of the invention
Feature of present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, in order to the understanding of technical staff of the same trade:
As shown in Figure 1-2, in figure, labelling 1-12 is respectively as follows: concrete bed 1, sealing coat 2, concrete press-casting layer 3, convex gear platform 4, track plates 5, rail 6, fastener 7, steam vent 8, pressure injection hole 9, aerofluxus ditch 10, fastener hole 11, template 12.
Embodiment: the construction method of the plate-type ballastless ballast bed structure in the present embodiment comprises the following steps:
The present embodiment, when Specific construction, has following steps:
After step 1, subgrade construction complete, construct above roadbed concrete bed 1 and convex gear platform 4, sealing coat 2 is laid on the surface of concrete bed 1, sealing coat 2 material can be geotextiles, and convex gear platform 4 is arranged on concrete bed 1 and traverse sealing coat 2；
Step 2, sealing coat 2 top formed in step 1 lay the internal reinforcing bar of concrete press-casting layer 3, are arranged around resilient sleeper-bearing at the convex gear platform 4 formed, laid rail guidance tape 5 after completing；The laying of fastener 7 and rail 6 is carried out after the laying completing track plates 5；
Step 3, laid in step 2 after the template 12 of the solidifying soil pressure note layer 3 of track plates 5 periphery, template 12 moves 80-120mm layout outside track plates 5 both sides, and additionally both sides are close to track plates 5 and are arranged, template 12 is highly 300-350mm；
In pressure injection hole 9 in step 4, the track plates 5 laid in step 3, concrete is injected in pressurization, injection pressure is minimum for 0.1MPa, stop injecting concrete when step 3 China and foreign countries move when template 5 inner concrete arranged reaches 80-150mm higher than track plates 5 bottom surface value f, form concrete press-casting layer 3, concrete press-casting layer 3 can locally be coated with track plates 5, make track plates 5 can be bonded one with concrete press-casting layer 3, improve the frictional force of both contacts site.
When two pressure injection holes 9 are injected simultaneously into concrete in track plates 5, if steam vent 8 pulp in pressure injection process, cotton yarn is adopted to block.After concrete press-casting completes, take out cotton yarn (if having), pour into mortar, arrange pressure injection hole 9 and steam vent 8 end face so that the smooth-going of track plates 5 end face is attractive in appearance.
Be positioned at the concrete bed 1 on roadbed end face top, its construction time inside also can be provided with reinforcing bar, play and Upper Structure power passed to down the effect covering roadbed.Sealing coat 2, between concrete bed 1 and concrete press-casting layer 3, is used for isolating concrete bed 1 and concrete press-casting layer 3.The bottom of convex gear platform 4 is fixedly installed on the surface of concrete bed 1, and its convex stage body, through sealing coat 2, plays the effect of isolation concrete bed 1 and concrete press-casting layer 3, it is simple to maintenance.Concrete press-casting layer 3 is internal is also provided with reinforcing bar, for improving the intensity of pressure injection layer.
As it is shown in figure 1, track plates 5 is fixedly installed between the convex gear platform 4 of adjacent two concrete beds 1, convex gear platform 4 primarily serves the effect of restriction track plates 5 horizontal displacement.
As in figure 2 it is shown, track plates 5 is positioned on concrete press-casting layer 3, being provided with reinforcing bar inside it, prefabricated for indoor, formed precision is higher, smooth and beautiful appearance.The plate body of track plates 5 is preset with multiple steam vent 8, the plate body of each steam vent 8 all vertically penetrating orbit plate 5, and be connected with the aerofluxus ditch 10 being preset in bottom track plates 5, some aerofluxus ditches 10 are arranged in the bottom of track plates 5 in crisscross shape, so, when the pressure injection of concrete press-casting layer 3, significantly increase the area of track plates 5 lower exhaust passage, ensure that concrete press-casting layer 3 is in pressure injection aerofluxus completely constantly, it is to avoid the problem that filling bed leakiness, air discharge difficulty, space is grown.Meanwhile, concrete press-casting layer 3 finally can fill whole aerofluxus ditch 10 and steam vent 8 in pressure injection, further increases the frictional force between track plates 5 and concrete press-casting layer 3.
As depicted in figs. 1 and 2, multiple pressure injection holes 9 are preset on the plate body of track plates 5, and each pressure injection hole 9 all passes vertically through track plates 5, concrete import during as concrete press-casting layer 3 pressure injection.
As depicted in figs. 1 and 2, multiple fastener holes 11 are preset on the plate body of track plates 5, and each fastener hole 11 lower end does not pass through track plates 5, for fastener for installing 7.
The present embodiment is in the specific implementation: it arranges position and is positioned in the middle part of track plates 5 to be arranged on the gear platform 4 of the convex on concrete bed 1, it is ensured that overall structure is symmetrical, uniform force.It is filled with concrete, to improve bonding strength between the two, thus improving the convex gear platform 4 position-limiting action to track plates 5 further between track plates 5 and convex gear platform 4.
The inside of track plates 5 is also provided with reinforcing bar, to improve the intensity of track plates 5.
The size of each parts in the present embodiment, intensity and technology require all to need to select according to actual design, being typically based on optional concrete bed 1 thickness of existing specification is 180-250mm, comprcssive strength is 50-60MPa, its diameter b is 450-550mm, it is highly 340-370mm, concrete slump > 200mm in concrete press-casting layer 3, divergence > 500mm, sealing coat 2 thickness is 4-6mm, width 2600-3000mm, more than track plates 5 width L1300-500mm, track plates 5 width L1 is 2300-2500mm, thickness is 160-200mm, length L2 is 3800-4200mm；Further, steam vent 8 diameter e is 15-30mm, spacing d1 is 500-800mm, array pitch d2 is 900-1100mm, and aerofluxus ditch 10 width d is 40-60mm, degree of depth d4 is 20-40mm, pressure injection hole 9 diameter a is 70-90mm, and spacing is 1800-2200mm, and fastener hole 11 diameter is 15-30mm.
Although elaborating with reference to the accompanying drawing design to the object of the invention and embodiment with above-described embodiment, but those of ordinary skill in the art will be consequently realised that, under the precondition limiting scope without departing from claim, still invention can be made various improvement and conversion, as: make the concrete shape of each parts, size and making material thereof etc., therefore do not repeat one by one at this.
Claims (5)
1. a construction method for plate-type ballastless ballast bed structure, described plate-type ballastless ballast bed structure is arranged on roadbed, it is characterised in that: described construction method at least comprises the following steps:
Construction concrete bed on described roadbed, lays sealing coat on described concrete bed, arranges convex gear platform on described concrete bed, makes the described convex gear platform described sealing coat of traverse；
Described convex at adjacent two concrete beds keeps off laid rail guidance tape between platform, at least offers some steam vents and some pressure injection holes on described track plates；
Side fixed and arranged concrete press-casting layer template at described track plates；
In the described pressure injection hole of described track plates, pressurization injection concrete makes concrete molding in described concrete press-casting layer template constitute concrete press-casting layer, and described concrete press-casting layer is positioned at above described sealing coat.
2. the construction method of a kind of plate-type ballastless ballast bed structure according to claim 1, it is characterized in that: after described track slab pavement completes, fastener and rail is fixedly mounted on its surface, being mounted by of described fastener realizes at the fastener hole of track plates surface programming, and described rail is fixedly mounted on described fastener.
3. the construction method of a kind of plate-type ballastless ballast bed structure according to claim 1, it is characterized in that: in described concrete pressurization injection process, when height at the bottom of the described concrete height in described concrete press-casting layer template is not less than the plate of described track plates, stop injecting described concrete.
4. the construction method of a kind of plate-type ballastless ballast bed structure according to claim 1, it is characterised in that: before described concrete pressurization injection process, lay the reinforcing bar of described concrete press-casting layer on the top of sealing coat.
5. the construction method of a kind of plate-type ballastless ballast bed structure according to claim 1, it is characterized in that: some described steam vents and some described pressure injection holes are preset on described track plates respectively, and offering crisscross some aerofluxus ditches bottom described track plates, described aerofluxus ditch is connected with described steam vent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610249434.4A CN105714619B (en) | 2016-04-21 | 2016-04-21 | The construction method of plate-type ballastless ballast bed structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610249434.4A CN105714619B (en) | 2016-04-21 | 2016-04-21 | The construction method of plate-type ballastless ballast bed structure |
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| CN105714619A true CN105714619A (en) | 2016-06-29 |
| CN105714619B CN105714619B (en) | 2017-10-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108086061A (en) * | 2017-12-28 | 2018-05-29 | 北京交通大学 | A kind of position limiting structure of non-fragment orbit |
| CN110080047A (en) * | 2019-05-11 | 2019-08-02 | 中铁第四勘察设计院集团有限公司 | A kind of modern tram fastener system |
| CN110468628A (en) * | 2019-08-28 | 2019-11-19 | 吴永芳 | A kind of position limiting structure and assembled track for assembled track |
| CN110656545A (en) * | 2018-06-28 | 2020-01-07 | 中铁第五勘察设计院集团有限公司 | Tramcar fastener and base plate thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108086061A (en) * | 2017-12-28 | 2018-05-29 | 北京交通大学 | A kind of position limiting structure of non-fragment orbit |
| CN108086061B (en) * | 2017-12-28 | 2023-12-22 | 北京交通大学 | Limiting structure of ballastless track |
| CN110656545A (en) * | 2018-06-28 | 2020-01-07 | 中铁第五勘察设计院集团有限公司 | Tramcar fastener and base plate thereof |
| CN110080047A (en) * | 2019-05-11 | 2019-08-02 | 中铁第四勘察设计院集团有限公司 | A kind of modern tram fastener system |
| CN110468628A (en) * | 2019-08-28 | 2019-11-19 | 吴永芳 | A kind of position limiting structure and assembled track for assembled track |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105714619B (en) | 2017-10-27 |
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