CN105200868A - Novel slab ballastless track structure - Google Patents
Novel slab ballastless track structure Download PDFInfo
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- CN105200868A CN105200868A CN201510582251.XA CN201510582251A CN105200868A CN 105200868 A CN105200868 A CN 105200868A CN 201510582251 A CN201510582251 A CN 201510582251A CN 105200868 A CN105200868 A CN 105200868A
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Abstract
The invention relates to a novel prefabricated slab ballastless track structure for high-speed railways and urban rail transit. The novel prefabricated slab ballastless track structure comprises rails, fasteners, prefabricated track slabs, under-slab filling and adjusting layers, a base and limiting bosses, wherein the track slabs are of a middle hollowed-out frame structure (through holes), the bosses (5) are arranged on the base (4) corresponding to the middle through holes of the prefabricated track slabs, and the limiting bosses (5) are single or multiple. The novel prefabricated slab ballastless track structure has the advantages that the pulling stress to the adjusting layers can be reduced, the track slabs bear larger pulling stress and the high-strength large-rigidity functions of the track slabs can be fully performed; since the track slabs are provided with through holes, the manufacturing cost is reduced, the longitudinal temperature stress to the track slabs is also relieved and the warping of the corners of the unit slab track structure is greatly reduced; since the limiting bosses are located in the middles of the track slabs, the replacement of parts such as the track slabs and the repair and treatment such as elevation and deviation correction in case of non-uniform settlement of tracks are facilitated.
Description
Technical field
The present invention relates to non-fragment orbit and lay field, particularly a kind of New-type plate non-fragment orbit and manufacture method thereof.
Background technology
At present, it is several that China's non-fragment orbit pattern mainly contains CRTS I type double-block type, CRTS I plate-type, CRTS II plate-type and CRTS III plate-type, in construction costs, efficiency of construction, maintenanceability etc., all have different pluses and minuses.
CRTS I type double-block type ballastless track has higher globality, and can continue to use the design and fabrication technology of sleeper, cost is relatively low, but its cast-in-place road bed board and prefabricated sleeper and road bed board New-old concrete joint surface easily crack; Road bed board is cast-in-situ concrete, surface drainage slope constructional difficulties, quality control on construction relative difficulty, and efficiency of construction is also relatively poor, and meanwhile, when destructive hurt appears in track structure, maintenanceability is relatively poor.
CRTS I plate-type non-fragment orbit has good workability and recoverability, and its beam-ends convex gear platform is stressed maximum, but beam-ends convex gear platform be semicircle, non-deformability and relatively poor for Longspan Bridge compliance; Filling bed cement emulsified asphalt mortar stability and durability are subject to raw material, construction technology and weather influence comparatively large, and Asphalt emulsion content is more, causes filling bed material cost relatively high.
CRTS II plate-type ballastless track structure globality and vertical continuity better, orbital forcing is good, but its constructing operation is loaded down with trivial details, track plates vertical link structure maintenanceability is relatively poor, beam-ends arranges anchor structure, and the globality for adjacent road structure has a negative impact, and poor for the engineering adjustment compliance in later stage, track plates fine finishining involves great expense, and building costs is the highest.
CRTS III plate-type non-fragment orbit adopts self-compacting concrete to replace cement emulsified asphalt mortar, reinforced mesh is laid for preventing adjustment layer concrete cracking, and under track plates pre-buried gate muscle, track plates is made to be connected as a whole with self-compacting concrete adjustment layer, the durable comparatively property of structure is good, but its filling bed self-compacting concrete adopts central mix, tank car is transported to cast-in-site, waste large percentage, also cause cost higher, simultaneously, when destructive hurt appears in the deterioration of plate lower limit groove organic elastic material, track structure, maintenanceability is poor.
Summary of the invention
In order to solve the deficiency in prior art, the invention provides a kind of New-type plate non-fragment orbit and manufacture method thereof.
A kind of New-type plate non-fragment orbit, comprise rail, fastener, precast track plate, plate retrofilling adjustment layer, base, positive stop lug boss, wherein: described New-type plate non-fragment orbit comprises at least one precast track plate and adjustment layer forms and is arranged on a corresponding base.Described precast track plate to be arranged in described adjustment layer and to be formed with at least one through hole at middle part, and described positive stop lug boss has the shape corresponding with the shape of described through hole, and rail is arranged on described precast track plate.Described track plates is middle transmission (through hole) frame form.
Described base arranges positive stop lug boss, and its position is corresponding with transmission place (through hole) in the middle of precast track plate, and positive stop lug boss outside dimension is less than track plates through hole.Described positive stop lug boss is single or multiple, corresponding track plates through hole is single or multiple, and during for single through hole, its through hole direction along ng a path (longitudinal direction) length of side is greater than its horizontal length of side; During for multiple middle transmission framework, its framework can be shape that is square, circular and that be made up of straight line and camber line.
Arrange vibration damping layer (6) between described precast track plate through hole and positive stop lug boss, vibration damping layer (6) can be installed in advance or later stage cast-in-site inside track plates through hole; Vibration damping layer (6) is made up of elastomeric material; Described elastomeric material is preformed rubber resilient sleeper-bearing or cast-in-place two component polyurethane.When adopting preformed rubber resilient sleeper-bearing, inside track plates through hole, facade and the outer side elevation of boss all have convex or recessed point cloth-like structure, then caoutchouc elasticity backing plate both sides have a recessed or convex point cloth-like structure to coincide with it, rubber mat plate is close to facade inside track plates through hole, and the space between itself and boss is filled fixing with not shrinking cracking-resistant cement mortar or pouring concrete; During cast-in-place two component polyurethane, first paste infusion bag at track plates through hole and boss gap, after the cast polyurethane that will be stirred fill.
Described filling adjustment layer (3) can select the one in self-compacting concrete, gravity flowing levelling mortar, polymer emulsion-material such as cementitious composite mortar or concrete, preferred adjustment layer is mulseal-cementitious composite mortar, form of construction work can adopt surrounding installation form or infusion bag construction, preferably infusion bag construction, then can form drainage channel between two strip adjustment layer under plate.
Between the bottom surface of described precast track plate (2) and described adjustment layer (3), separation layer (7) is set; Separation layer (7) is formed by geotextiles, non-woven fabrics or release coating.
Gap is provided with between described contiguous prefabricated track plates (2), and without any connection or packing material between adjacent precast track plate (2).
Described a kind of New-type plate non-fragment orbit, described base is longitudinally unit fraction block structure, is provided with transverse slot between adjacent pans unit, and each base unit length can be length corresponding to one or more track plates.
According to another aspect of the present invention, a kind of method manufacturing above-mentioned New-type plate non-fragment orbit comprises the following steps:
1) lay base steel mesh reinforcement, carry out block placement concrete to form described base, when seat concrete reaches 70% intensity, pourable positive stop lug boss, also can reserve boss bar construction;
2) install precast track plate, the position of precast track plate described in accurate adjustment, then arranges the hold down gag of precast track plate;
3) plate retrofilling layer material is poured into.If positive stop lug boss concrete is poured into a mould, can first be laid on below the track correspondence of track plates both sides by two strip infusion bags, Reperfu-sion plate retrofilling adjustment layer, forms drainage channel between two strip adjustment layer under plate; If reserved positive stop lug boss reinforcing bar, also can first by after preestablishing separation layer at the bottom of track plates, under plate, cavity surrounding establishes template, rubber mat plate is pre-installed in facade inside track plates through hole, finally filling bed material is entered from reserved positive stop lug boss reinforcing bar perfusion, until full, boss and plate retrofilling layer form one, and preferred material used is self-compacting concrete;
4) after the sclerosis of plate retrofilling layer material, can at the vibration damping layer elastomeric material of track plates through hole and positive stop lug boss gap in-site installation or cast (can save when boss and plate retrofilling layer are integrally poured into a mould).
Preferably, described elastomeric material is preformed rubber resilient sleeper-bearing or cast-in-place two component polyurethane.
In described step 3) in, when frame founds described template, form separation layer in the bottom surface of track plates in advance.
Further, at the bottom surface of precast track plate bonding geotextiles, non-woven fabrics or Polypropylence Sheet using as separation layer; Or at described bottom surface spraying release coating as separation layer.
Alternatively, in described step 3) in, when using described infusion bag, the infusion bag outside the direct contact adjusting layer in bottom surface of precast track plate.
Adjustment layer and positive stop lug boss can integrated poured shaping or moulding by casting individually.
In addition, after the intensity of base reaches more than 70% of design strength, described step 2 can be performed).
Because corresponding surface between adjustment layer of the present invention and track plates is plane, cause between adjustment layer and track plates two-layer for what be separated from each other, compared with gate muscle pre-buried under existing track plates connects as a whole structure with self-compacting concrete adjustment layer, the present invention can make adjustment layer institute tension stress reduce, track plates bears larger tensile stress, can give full play to the high strength large rigidity function of track plates; Track plates arranges through hole and reduces manufacturing cost, also mitigates axially temperature stress suffered by track plates, significantly reduces unit plate type track structure plate angle warpage; Positive stop lug boss, in the middle of track plates, is convenient to the part replacement such as track plates, can carry out the maintenance regulations such as lifting correction when differential settlement quickly and easily.In addition, positive stop lug boss (5) also can together with adjustment layer moulding by casting, required adjustment layer mortar can adopt current a large amount of idle Mobile mortar trolley in situ preparation, significantly can reduce raw material and social resources waste, and decrease boss construction sequence, improve efficiency of construction.
Thus, non-fragment orbit pattern provided by the invention is from the viewpoint of structure design and stressed comparatively reasonable, there is good structural stability, durability and recoverability, and good construction convenience, the requirement of the track traffic high rides such as railway, light rail, subway and high stability can be met.
Accompanying drawing explanation
Above-mentioned and other side of the present invention and feature present from below in conjunction with accompanying drawing the explanation of embodiment is clear, wherein:
Fig. 1 is the front view of the New-type plate non-fragment orbit according to the embodiment of the present invention 1;
Fig. 2 is the side sectional view of the New-type plate non-fragment orbit according to the embodiment of the present invention 1;
Fig. 3 is the cross-section cutaway view of the New-type plate non-fragment orbit according to the embodiment of the present invention 1;
Fig. 4 is the front view of the New-type plate non-fragment orbit according to the embodiment of the present invention 2;
Fig. 5 is the side sectional view of the New-type plate non-fragment orbit according to the embodiment of the present invention 2;
Fig. 6 is the front view of the New-type plate non-fragment orbit according to the embodiment of the present invention 3;
Fig. 7 is the side sectional view of the New-type plate non-fragment orbit according to the embodiment of the present invention 3;
Fig. 8 is the cross-section cutaway view of the New-type plate non-fragment orbit according to the embodiment of the present invention 3.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, a kind of New-type plate non-fragment orbit provided by the invention and manufacture method thereof are described in detail.
New-type plate non-fragment orbit according to the present invention comprises rail 1, at least one pre-track Slab element and at least one base 4.Each at least one pre-track Slab element described is made up of precast track plate 2 and adjustment layer 3 and is arranged on a corresponding base.In each pre-track Slab element, adjustment layer 3 is arranged on base 4, precast track plate 2 to be arranged in adjustment layer 3 and to be formed with at least one through hole at middle part, adjustment layer 3 is provided with the positive stop lug boss 5 be correspondingly engaged in each through hole, described positive stop lug boss has the shape corresponding with the shape of described through hole, and rail 1 is arranged on precast track plate 2.The quantity of pre-track Slab element and base can be selected arbitrarily according to the length of track, thus meets the requirement of various track.
According to New-type plate non-fragment orbit of the present invention, corresponding surface between adjustment layer 3 and precast track plate 2 is plane, adjustment layer and precast track plate is made to be separated from each other two-layer, compared with this and gate muscle pre-buried under existing track plates connect as a whole structure with self-compacting concrete adjustment layer, adjustment layer institute tension stress can be made to reduce, and track plates bears larger tensile stress, namely both play its maximum effect according to respective rigidity.Non-fragment orbit of the present invention comprises at least one base, and at least one pre-track Slab element is set on each base, this unit sectional type design of base can reduce the irregular cracking of concrete bed, improve the durability of base, and track plates, adjustment layer and base are hierarchy and soap-free emulsion polymeization between track plates and adjustment layer, make structure stress more reasonable, the durability of spacer structure can be improved.In addition, because precast track plate adopts unit fraction block structure, when track plates is by bulk temperature loads change, only fastener and boss are to the effect of contraction of track plates, alleviate axially temperature stress suffered by track plates, therefore suffered thermal stresses is much smaller than TEMPERATURE FORCE suffered by continous way plate-type ballastless track, meets the requirement of railway high ride and high stability.In addition, the middle part due to precast track plate 2 is formed with at least one through hole, adjustment layer 3 is provided with the positive stop lug boss 5 be correspondingly engaged in each through hole.Therefore, boss limits the transverse shifting of track plates on base through track plates face as stopping means and vertically moves, the soap-free emulsion polymeization design between track plates and adjustment layer can be obtained, and the track geometry that track is correct can be kept, ensure effective transmission of train load, temperature load etc., further increase the stability of track structure.Further, due to the middle transmission frame construction of track plates, not only significantly reduce deadweight and the manufacturing cost of track plates, and can eliminate and cause integral slab corner warpage by the temperature difference and produce the deficiency of gap.
Further, the bottom surface of precast track plate 2 can directly contact with adjustment layer 3 or be provided with separation layer in-between.Such as, as Figure 1-3, between the bottom surface of precast track plate 2 and adjustment layer 3, separation layer 7 is set.Separation layer 7 such as can be formed by geotextiles, non-woven fabrics, Polypropylence Sheet or release coating, but the material of separation layer is not limited thereto.The maintenance that separation layer further facilitates track is set between precast track plate and adjustment layer.
In addition, positive stop lug boss 5 arranges vibration damping layer 6 with the inner side of precast track plate 2.Such as, as Figure 1-3, between precast track plate 2 and positive stop lug boss 5, vibration damping layer 6 is set.Vibration damping layer 6 is formed by elastomeric material.Preferably, described elastomeric material is resin elasticity material, and more preferably, described elastomeric material is prefabricated preformed rubber resilient sleeper-bearing or cast-in-place two component polyurethane.Material described herein is only exemplary, and the material of vibration damping layer is not limited thereto, and can adopt any elastomeric material that this area is conventional.By arranging vibration damping layer between precast track plate and positive stop lug boss, track vibration can be reduced.
Further, between adjacent precast track plate 2, be provided with gap, and without any connection or packing material between adjacent precast track plate 2.In addition, gap is provided with between adjacent base 4.Thus, New-type plate non-fragment orbit of the present invention forms sectional type block construction.Can align with the gap between adjacent pans in gap between adjacent precast track plate, also can not line up.The embodiment of gap alignment is shown in embodiments of the invention 1.
In addition, precast track plate 2 can be such as prefabricated C60 reinforced concrete frame plate, and positive stop lug boss 5 such as adopts compressive strength to be more than 30MPa steel concrete (or mortar).According to an example, adjustment layer 3 can adopt self-compacting concrete, gravity flowing levelling mortar or polymer-modified cement mortar and concrete.
Fig. 1-Fig. 3 shows the New-type plate non-fragment orbit according to embodiments of the invention 1, and wherein the middle part of single precast track plate 2 is formed with a through hole, makes single adjustment layer to be provided with a positive stop lug boss 5.In embodiment 1, the longitudinal edge that described positive stop lug boss 5 prolongs orbital direction is longer than the widthwise edge of this positive stop lug boss.
Fig. 4 and Fig. 5 shows the New-type plate non-fragment orbit according to embodiments of the invention 2, and with the difference of embodiment 1, embodiment 2 is that the middle part of single precast track plate 2 is formed with multiple through hole, make single adjustment layer to be provided with multiple positive stop lug boss 5.Although be quadrangle at this diagram display through hole, through hole shape is not limited thereto, described positive stop lug boss 5 can to have in square, circular, straight line and camber line the shape of any one or multiple composition.
As shown in figs 6-8, the New-type plate non-fragment orbit according to embodiments of the invention 3 is shown.In this embodiment, boss pouring concrete, track plates both sides track retrofilling layer is polymer cement compound low-elasticity-modulus gravity flowing levelling mortar, and adopts strip infusion bag method to construct, and can reduce by the filling bed material usage of 1/3rd.
Next, the method for the above-mentioned New-type plate non-fragment orbit of manufacture according to the present invention will be described.Particularly, manufacturing method according to the invention comprises the following steps:
1) lay base steel mesh reinforcement, carry out block placement concrete to form described base, when seat concrete reaches 70% intensity, pourable positive stop lug boss, also can reserve boss bar construction;
2) install precast track plate, the position of precast track plate described in accurate adjustment, then arranges the hold down gag of precast track plate;
3) if positive stop lug boss (5) is poured into a mould, then first two strip infusion bags are laid on below the track correspondence of track plates both sides, Reperfu-sion plate retrofilling adjustment layer; If only reserved positive stop lug boss (5) reinforcing bar, then after preestablishing separation layer at the bottom of track plates, first cavity surrounding under plate is established template, then filling bed material is entered, until full from reserved positive stop lug boss reinforcing bar perfusion;
4), after the sclerosis of plate retrofilling layer material, vibration damping layer (6) elastic resin material between cast-in-site track plates (2) through hole and positive stop lug boss (5) is got final product; If damping material is preformed rubber backing plate, then before perfusion filling bed material, should be pre-installed in inside track plates through hole.
5) steel rail laying on precast track plate 2.
Further alternatively, elastomeric material or follow-up cast elastic resin material are installed in advance on the border of at least one through hole described, thus form vibration damping layer 6 between precast track plate 2 and positive stop lug boss 5.
In described step 3) in, when frame founds described template, form separation layer 7 in the bottom surface of precast track plate 2 in advance.Particularly, such as, at the bottom surface of precast track plate 2 bonding geotextiles, non-woven fabrics or Polypropylence Sheet using as separation layer 7, or at described bottom surface spraying release coating as separation layer 7.And on the other hand, in described step 4) in, when laying infusion bag, the direct contact adjusting layer 3 in bottom surface of precast track plate 2.
In addition, adjustment layer 3 and positive stop lug boss 5 can integrated poured shaping or moulding by casting individually.
In addition, preferably, after the intensity of base 4 reaches more than 70% of design strength, described step 2 can be performed), to ensure intensity and the steadiness of whole New-type plate non-fragment orbit.
In addition, according to inventive concept, according to concrete track switch laying condition, by changing precast track plate apparent size, middle through hole parameter, also switch area can be applied the present invention to.So, then the regulation reparation of China's trouble district differential settlement can adopt the mode of simple and fast.
Although be illustrated exemplary embodiments of the present invention, obviously it will be understood by those skilled in the art that and can to change when not deviating from spirit of the present invention and principle, its scope limits in claims and its equivalent.
Claims (9)
1. a New-type plate non-fragment orbit, comprise rail (1), fastener, precast track plate (2), plate retrofilling adjustment layer (3), base (4), positive stop lug boss (5), wherein: described New-type plate non-fragment orbit comprises at least one precast track plate (2) and adjustment layer (3) forms and is arranged on a corresponding base, described precast track plate (2) is arranged on described adjustment layer (3) and goes up and be formed with at least one through hole at middle part, described positive stop lug boss has the shape corresponding with the shape of described through hole, rail (1) is arranged on described precast track plate (2), described track plates is middle transmission frame form.
2. a kind of New-type plate non-fragment orbit according to claim 1, wherein, described base (4) arranges positive stop lug boss (5), and its position is corresponding with transmission place in the middle of precast track plate, and positive stop lug boss (5) outside dimension is less than track plates through hole.
3. a kind of New-type plate non-fragment orbit according to claim 1, wherein, described positive stop lug boss (5) is for single or multiple, corresponding track plates through hole is single or multiple, during for single through hole, its through hole direction along ng a path (longitudinal direction) length of side is greater than its horizontal length of side; During for multiple middle transmission framework, its framework can be shape that is square, circular and that be made up of straight line and camber line.
4. a kind of New-type plate non-fragment orbit according to claim 1, wherein, arranges vibration damping layer (6) between described precast track plate (2) through hole and positive stop lug boss (5).
5. a kind of New-type plate non-fragment orbit according to claim 4, wherein, described vibration damping layer can be installed in advance or later stage cast-in-site inside track plates through hole; Vibration damping layer (6) is made up of elastomeric material; Described elastomeric material is preformed rubber resilient sleeper-bearing or cast-in-place two component polyurethane.
6. a kind of New-type plate non-fragment orbit according to claim 1, wherein, described adjustment layer (3) can select the one in self-compacting concrete, gravity flowing levelling mortar, polymer emulsion-material such as cementitious composite mortar or concrete, preferred adjustment layer is mulseal-cementitious composite mortar, and form of construction work can adopt surrounding installation form or infusion bag construction.
7. a kind of New-type plate non-fragment orbit according to claim 1, wherein, arranges separation layer (7) between the bottom surface of described precast track plate (2) and described adjustment layer (3); Separation layer (7) is formed by geotextiles, non-woven fabrics or release coating.
8. a kind of New-type plate non-fragment orbit according to claim 1, wherein, is provided with gap between described contiguous prefabricated track plates (2), and without any connection or packing material between adjacent precast track plate (2).
9. a kind of New-type plate non-fragment orbit according to claim 1, described base (4) is longitudinally unit fraction block structure, be provided with transverse slot between adjacent pans unit, each base unit length can be length corresponding to one or more track plates.
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CN107542039A (en) * | 2017-10-10 | 2018-01-05 | 储君 | A kind of bridge floor laying method |
CN108774921A (en) * | 2018-08-13 | 2018-11-09 | 中铁二院工程集团有限责任公司 | A kind of assembled fragment-free track slab |
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CN112030630A (en) * | 2020-09-27 | 2020-12-04 | 武汉比邻科技发展有限公司 | Grouting bag for ballastless track adjusting layer and using method thereof |
CN115450073A (en) * | 2022-07-29 | 2022-12-09 | 中铁第一勘察设计院集团有限公司 | Construction method and structure system of low-height assembled ballastless track |
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CN205242181U (en) * | 2015-09-14 | 2016-05-18 | 中国铁道科学研究院金属及化学研究所 | Novel board -like ballastless track structure |
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AT521653B1 (en) * | 2018-09-07 | 2023-09-15 | Porr Bau Gmbh | Switch arrangement with elastically mounted switch support plates |
CN110106751B (en) * | 2019-04-17 | 2020-10-02 | 中铁第四勘察设计院集团有限公司 | Settlement adjustment method suitable for CRTS II type plate ballastless track |
CN110106751A (en) * | 2019-04-17 | 2019-08-09 | 中铁第四勘察设计院集团有限公司 | A kind of sedimentation method of adjustment suitable for II plate-type non-fragment orbit of CRTS |
CN110172869A (en) * | 2019-05-30 | 2019-08-27 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | The construction method of assembled ballastless track system and assembled ballastless track system |
CN110453541A (en) * | 2019-08-16 | 2019-11-15 | 西南交通大学 | A kind of flush type track |
CN110939017A (en) * | 2019-12-13 | 2020-03-31 | 西南交通大学 | Elastic prefabricated assembling plate type ballast track |
CN111893808A (en) * | 2020-08-21 | 2020-11-06 | 中铁四院集团工程建设有限责任公司 | Treatment structure and treatment method for damage of ballastless track boss |
CN112030630A (en) * | 2020-09-27 | 2020-12-04 | 武汉比邻科技发展有限公司 | Grouting bag for ballastless track adjusting layer and using method thereof |
CN115450073A (en) * | 2022-07-29 | 2022-12-09 | 中铁第一勘察设计院集团有限公司 | Construction method and structure system of low-height assembled ballastless track |
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