CN205171283U - Steel pipe concrete sleeper suitable for ballastless track - Google Patents

Abstract

The utility model discloses a steel pipe concrete sleeper suitable for ballastless track, its sleeper connecting piece that includes two or two above sleeper concrete pieces and be used for connecting sleeper concrete piece, sleeper concrete piece is the massive structure, and it is formed by concrete placement, the reinforcing bar net piece or the stirrup that are provided with the built -in fitting that is used for fixed rail in it and connect the sleeper connecting piece, the hollow steel pipe that the sleeper connecting piece was put between sleeper concrete piece by many genshui plain cloth constitutes, builds the in -process at sleeper concrete piece, makes simultaneously to fill the concrete in the hollow steel pipe to this forms the steel pipe concrete, and then makes sleeper connecting piece and sleeper concrete piece pour as an organic wholely. The utility model discloses use the steel pipe concrete in ballastless track concrete sleeper, with the steel pipe concrete as rail pillow block connecting piece to with steel pipe concrete and sleeper concrete piece integrated into one piece, effectively increase by how much morpheme holding capacities of sleeper, reduce the steel quantity, but have advantages such as the simple application property of preparation is strong.

Description

A kind of concrete filled steel tube sleeper being applicable to non-fragment orbit

Technical field

The utility model belongs to non-fragment orbit concrete sleeper field, more specifically, relates to a kind of concrete filled steel tube sleeper being applicable to non-fragment orbit.

Background technology

In pillow formula ballastless track system, the function of sleeper mainly provides the determination of fastener embedded parts location and track geometry in ballastless track bed board work progress, on the one hand, in order to ensure that road bed board builds the adjustment amount correctly and as far as possible reducing fastener in rail accurate adjustment process of rear track geometry, require that sleeper has good morpheme hold facility, and manufacturing, deposit, to transport and its deflection and bending resistance in work progress, anti-twisting property should meet related request; On the other hand, in order to effectively control the width that cracks between precast concrete sleeper and cast-in-place road bed board New-old concrete and quantity, ensure that non-fragment orbit agent structure meets concrete structure and to be correlated with the requirement of durability regulation, the long sleeper of conventional concrete successive optimization be designed to be connected by truss bars, the concrete sleeper block of location.

At present, in non-fragment orbit, concrete sleeper is widely used mainly comprises: the Stdedf sleeper of (1) France, and its sleeper link adopts angle steel; (2) German radar 2000, its sleeper link adopts steel bar girder or bracing piece, as application publication number CN102277799A, a kind of steel bar welded wire mesh concrete sleeper disclosed in the patent document in December 14 2011 Shen Qing Publication day; Publication number CN101316964A, a kind of concrete sleeper disclosed in the patent document in publication date on December 3rd, 2008; Authorization Notice No. CN100443663C, a kind of block formula disclosed in the patent document in authorized announcement date on December 17th, 2008 or multi-block sleeper and manufacture method thereof, the domestic CRTS I type block type sleeper extensively laid at present digest, absorbs, innovates formation again on radar 2000 sleeper basis; (3) using steel pipe as the ladder-type sleepers of link, as Authorization Notice No. CN1135279C, a kind of ladder-type sleepers and railroad track disclosed in the patent document in authorized announcement date on January 21st, 2004; Authorization Notice No. CN1099505C, a kind of ladder-type sleeper for railway track volume connector of steel tube disclosed in the patent document in authorized announcement date on January 22nd, 2003.

But, further research shows, still there is following problem in above-mentioned sleeper: (1) Stdedf type non-fragment orbit adopts block formula concrete sleeper, sleeper concrete interblock Bolted angle connection, to increase stability, this sleeper production technology is simple, but sleeper uses angle steel more, cost is higher, and sleeper non-deformability is poor; (2) radar 2000 and CRTS I type block type sleeper steel bar girder are the space welded construction of many straight chord member reinforcing bars and two waveform web member reinforcing bars, it produces through the operation such as cold rolling, straightening, bending and welding, this steel bar girder makes need adopt special equipment, complex process, equipment is expensive, causes sleeper cost high, its waveform web member wavelength adjustment difficulty, and length consuming time, on-the-spot adaptive capacity is poor; (3) using steel pipe as the ladder-type sleepers of link, it mainly utilizes steel pipe to realize the connection of two longitudinal beams, the sleeper of preparation is applicable to Ballast track, in the preparation process of this sleeper, specially treated need be carried out in the end of steel pipe, as end leveling or utilize prestressed reinforcement and bracing piece realize the effective connection of steel pipe and longitudinal beam and prevent from turning round, its complicated process of preparation, site operation cannot be realized.

Utility model content

For above defect or the Improvement requirement of prior art, the utility model provides a kind of concrete filled steel tube sleeper being applicable to non-fragment orbit, wherein concrete filled steel tube is applied in non-fragment orbit concrete sleeper, with the link of concrete filled steel tube as sleeper block, the distortion of concrete sleeper depositing, in the process such as transport effectively can be alleviated; Simultaneously also by realizing the shaping of concrete filled steel tube while building sleeper concrete block, effectively increasing sleeper track geometry hold facility, decreasing amount of reinforcement, improve can application property, meets the requirement of sleeper bending-twisting ability; In addition, concrete filled steel tube end of the present utility model is without the need to doing specially treated, by hollow steel pipe being directly placed in the mfg. moulding die of sleeper concrete block, the shaping of concrete filled steel tube sleeper can be realized, convenient and quick construction, thus concrete filled steel tube sleeper of the present utility model is particularly useful for the occasions such as non-fragment orbit.

For achieving the above object, the utility model proposes a kind of concrete filled steel tube sleeper being applicable to non-fragment orbit, it is characterized in that, comprising two or more sleeper concrete blocks and the sleeper connector for being connected above-mentioned sleeper concrete block, wherein:

Described sleeper concrete block is formed by concreting, is provided with the built-in fitting for fixing rail and the reinforced mesh for being connected described sleeper connector or stirrup in each described sleeper concrete block;

Described sleeper connector is made up of the hollow steel pipe of many horizontal arrangement between two described sleeper concrete blocks, in the casting process of described sleeper concrete block, makes all to fill concrete in described every root hollow steel pipe, forms concrete filled steel tube with this.

As preferred further, described hollow steel pipe is circular hollow steel pipe.

As preferred further, described hollow steel pipe is two, and it is distributed in the both sides of described built-in fitting.

As preferred further, described hollow steel pipe is three, and above-mentioned three hollow steel pipes are arranged in the following manner: the circle center line connecting of the cross section of described three hollow steel pipes forms triangle.

As preferred further, the side of described sleeper concrete block is provided with the inclination angle of 11:1 ~ 7:1, and chamfered is all carried out in the corner above it.

As preferred further, described reinforced mesh or stirrup are independently placed in described sleeper concrete block, to improve the intensity of described sleeper concrete block.

As preferred further, the bending stiffness EI of described concrete filled steel tube sleeper _zfollowing design formulas is adopted to obtain:

${\mathrm{EI}}_Z=\frac{8{\mathrm{Fl}}^3+5{\mathrm{ql}}^4}{384f};$

Wherein, F is the concentrated load that the external world is applied in the middle part of concrete sleeper, and l is standoff distance in stress model, and q is the evenly distributed load that the deadweight of concrete filled steel tube sleeper produces, and f is the maximum deflection displacement of concrete sleeper under load effect.

As preferred further, the torsional stiffness GI of described concrete filled steel tube sleeper _pfollowing design formulas is adopted to obtain:

Wherein, T for being applied to the torque load on sleeper concrete block (2), for the angle of twist per unit length of concrete sleeper under torque load effect.

As preferred further, the bending stiffness of described concrete filled steel tube sleeper is 1145.3kN/m ², torsional stiffness is 61.7kNm ²/ rad.

In general, the utility model is on existing non-fragment orbit concrete sleeper basis, for current Problems existing, propose the concrete filled steel tube sleeper replacing steel bar girder with concrete filled steel tube, the above technical scheme conceived by the utility model compared with prior art, mainly possesses following technological merit:

1. concrete filled steel tube is applied in non-fragment orbit concrete sleeper by the utility model, with the link of concrete filled steel tube as sleeper block, compared with connecting with general Combined type reinforced truss, globality is stronger, effectively can alleviate the distortion of concrete sleeper depositing, in the process such as transport; One-body molded simultaneously by concrete filled steel tube and sleeper concrete block, namely while building sleeper concrete block, realize the shaping of concrete filled steel tube, and concrete filled steel tube is designed to be made up of many hollow steel pipes, effectively add sleeper track geometry hold facility, decrease amount of reinforcement, improve can application property, directly can construct at the scene, meet the requirement of sleeper bending-twisting ability.

2. the concrete filled steel tube end in the utility model is without the need to doing specially treated, also without the need to arranging prestressed reinforcement in sleeper concrete block, only hollow steel pipe directly need be placed in the mfg. moulding die of sleeper concrete block, build with sleeper concrete block and be integrated, convenient and quick construction, without the need to adopting special production equipment, construction costs is low; And the sleeper concrete block almost symmetry of building is in rail vertical axis, less with the bonding surface of cast-in-place road bed board, the inclined-plane of certain slope is arranged in sleeper concrete block side simultaneously, above sleeper concrete block, chamfered is all carried out in corner, is convenient to concrete sleeper block in the demoulding manufactured in manufacturing process and reduce concrete stress and concentrate.

3. known by concrete filled steel tube sleeper of the present utility model and the bending resistance of existing steel bar girder sleeper, antitorque contrast test, bending resistance, the torsional property of concrete filled steel tube concrete sleeper of the present utility model are good, keep track geometry ability strong, with road bed board in conjunction with effective, the stability of track is strong; In addition, concrete filled steel tube sleeper of the present utility model has the advantages such as preparation technology is simple, with low cost, reliable in quality, specification are flexible, precision is high, error is little, has high business promotion and application prospect.

Accompanying drawing explanation

Fig. 1 is the concrete filled steel tube sleeper schematic diagram that the utility model adopts three concrete filled steel tubes connections;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the side sectional view of Fig. 1;

Fig. 4 is employing of the present utility model two concrete filled steel tube joint steel pipe concrete sleeper schematic diagrames;

Fig. 5 is the top view of Fig. 4;

Fig. 6 is the side sectional view of Fig. 4;

Fig. 7 is two concrete filled steel tube sleeper bending stiffness load modes;

Fig. 8 is two concrete filled steel tube sleeper torsional stiffness load modes;

Fig. 9 is many concrete filled steel tubes sleeper schematic diagram.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.In addition, if below in described each embodiment of the utility model involved technical characteristic do not form conflict each other and just can mutually combine.

As shown in figures 1 to 6, a kind of concrete filled steel tube sleeper being applicable to non-fragment orbit, comprise two sleeper concrete blocks 2 and the sleeper connector 3 (i.e. concrete filled steel tube) for being connected two sleeper concrete blocks 2, two sleeper concrete blocks 2 form with concreting, are preferably block structure in the present embodiment, be provided with the built-in fitting 5 for fixing rail 1 in two sleeper concrete blocks 2, this built-in fitting 5 makes each sleeper concrete block 2 all be symmetrical in the vertical axis of rail 1 mounted thereto, and guarantees that sleeper concrete block 2 is reliably connected by fastener with rail 1, concrete filled steel tube is between two sleeper concrete blocks 2, for two sleeper concrete blocks 2 are connected as a whole, wherein, concrete filled steel tube utilizes many hollow steel pipe horizontal cross to be arranged in the mfg. moulding die of sleeper concrete block 2, build with sleeper concrete block 2 and be integrated, in casting process, in every root hollow steel pipe, all fill concrete simultaneously, above-mentioned transverse direction is vertical with the arranged direction of rail 1, wherein, hollow steel pipe in concrete filled steel tube is preferably circular hollow steel pipe, it also can be square hollow steel pipe, quantity is preferably two or three, and arrange (as shown in figs. 3 and 6) in the following way: two hollow steel pipes are positioned at embedding pipe fittings 5 left and right sides, the circle center line connecting of the cross section of three hollow steel pipes forms triangle, and this cross section is vertical with the arranged direction of rail 1.By adopting the concrete filled steel tube of said structure, effectively can increase sleeper track geometry hold facility, reduce amount of reinforcement, raising can application property, be convenient to it directly construct at the scene, but in the utility model, the quantity of hollow steel pipe is not limited to the occurrence of above-described embodiment, can specifically selects according to actual needs.Sleeper concrete block 2 upper surface does not establish medial and lateral shoulder block, and convenient construction personnel trample; The inclination angle of 11:1 ~ 7:1 is established in the side of sleeper concrete block 2, so that demoulding when manufacturing, chamfered is all carried out in the corner above sleeper concrete block, not only conveniently stripped, and it is concentrated to prevent or reduce the concrete stress of road bed board around, reduce the concrete crackle of road bed board; Arrange reinforced mesh or stirrup 4 in sleeper concrete block 2, this reinforced mesh or stirrup 4 are independently placed in sleeper concrete block 2, to improve the intensity of sleeper concrete block.Imbedding in the concrete road bed board of cast in situs after above-mentioned concrete filled steel tube sleeper is prefabricated, is one of important component part of pillow formula ballastless track system.

In addition, the concrete filled steel tube sleeper (as shown in Figure 9) with three and above sleeper concrete block can also be obtained by the utility model, so that be applicable to various many rails section.In addition, according to actual strength test and strength demand, any type of hollow sections such as plastic hollow pipe also can be adopted to substitute hollow steel pipe in the utility model, only need ensure that its intensity, bending resistance, torsional property meet the demands.

In order to obtain the mechanical property of the utility model reinforced concrete sleeper, the present embodiment carries out the bending resistance of concrete filled steel tube sleeper and existing steel bar girder sleeper, antitorque contrast test.

As shown in Figure 7, in model, steel bar girder sleeper is identical with the load mode of reinforced concrete sleeper for bending stiffness contrast test, is all the wire freely-supported constraints of two ends, left and right, draws following result of the test by contrast test:

(1) steel bar girder sleeper bending stiffness

1. the evenly distributed load q=938.1N/m of dead load generation

2. point load: F=1000N

3. flexing displacement: f=0.283mm

4. standoff distance in model: l=1.8m

Bending stiffness: ${\mathrm{EI}}_Z=\frac{8{\mathrm{Fl}}^3+5{\mathrm{ql}}^4}{384f}=\frac{8\×1000\×{1.8}^3+5\×938.1\×{1.8}^4}{384\×0.283\×{10}^{-3}}=882.4kN/m^2.$

(2) concrete filled steel tube sleeper bending stiffness

1. the evenly distributed load q=1140N/m of dead load generation

2. point load: F=1000N

3. flexing displacement: f=0.172mm

4. standoff distance in model: l=1.5m

Bending stiffness: ${\mathrm{EI}}_Z=\frac{8{\mathrm{Fl}}^3+5{\mathrm{ql}}^4}{384f}=\frac{8\×1000\×{1.5}^3+5\×1140\×{1.5}^4}{384\×0.127\×{10}^{-3}}=1145.3kN/m^2.$

The bending stiffness of steel bar girder sleeper is better than by the bending stiffness of the known concrete filled steel tube sleeper of above-mentioned model testing result.

As shown in Figure 8, in model, steel bar girder sleeper is identical with the load mode of reinforced concrete sleeper for torsional stiffness contrast test, and torsion clamped by left side rail bolster upper and lower surface zone line clamping plate, and right side is completely fixed, and draws following result of the test by contrast test:

(1) steel bar girder sleeper torsional stiffness

1. moment of torsion load: T=1000Nm

2. angle of twist per unit length:

Torsional stiffness:

(2) concrete filled steel tube sleeper torsional stiffness

1. moment of torsion load: T=1000Nm

2. angle of twist per unit length:

Torsional stiffness:

Wherein, T is the torque load be applied to when sleeper side concrete block is fixed on opposite side concrete block, is slightly less than bi-steel truss sleeper torsional stiffness by above-mentioned model testing known pair of concrete filled steel tube sleeper torsional stiffness.

In the present embodiment, also the single sleeper steel using amount of steel bar girder sleeper and reinforced concrete sleeper is contrasted, be 18.1kg by calculating the single sleeper steel using amount of steel bar girder sleeper, the single sleeper steel using amount of concrete filled steel tube sleeper is 16.6kg, and the single sleeper steel using amount of concrete filled steel tube sleeper is less than steel bar girder sleeper.

In sum, concrete filled steel tube sleeper of the present utility model is all better than steel bar girder sleeper on bending stiffness, single sleeper steel using amount, and torsional stiffness is slightly less than steel bar girder sleeper, therefore has very high theory value and business promotion prospect.

Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.

Claims (9)

1. being applicable to a concrete filled steel tube sleeper for non-fragment orbit, it is characterized in that, comprising two or more sleeper concrete blocks (2) and the sleeper connector (3) for being connected above-mentioned sleeper concrete block (2), wherein:

Described sleeper concrete block (2) is formed by concreting, is provided with the built-in fitting (5) for fixing rail (1) and the reinforced mesh for being connected described sleeper connector (3) or stirrup in each described sleeper concrete block (2);

Described sleeper connector (3) is made up of the hollow steel pipe of many horizontal arrangement between two described sleeper concrete blocks (2), in the casting process of described sleeper concrete block (2), make all to fill concrete in described every root hollow steel pipe, form concrete filled steel tube with this.

2. be applicable to the concrete filled steel tube sleeper of non-fragment orbit as claimed in claim 1, it is characterized in that, described hollow steel pipe is circular hollow steel pipe.

3. be applicable to the concrete filled steel tube sleeper of non-fragment orbit as claimed in claim 2, it is characterized in that, described hollow steel pipe is two, and it is distributed in the both sides of described built-in fitting (5).

4. be applicable to the concrete filled steel tube sleeper of non-fragment orbit as claimed in claim 2, it is characterized in that, described hollow steel pipe is three, and above-mentioned three hollow steel pipes are arranged in the following manner: the circle center line connecting of the cross section of described three hollow steel pipes forms triangle.

5. be applicable to the concrete filled steel tube sleeper of non-fragment orbit as claimed in claim 4, it is characterized in that, the side of described sleeper concrete block (2) is provided with the inclination angle of 11:1 ~ 7:1, and chamfered is all carried out in the corner above it.

6. the concrete filled steel tube sleeper being applicable to non-fragment orbit as described in claim 4 or 5, it is characterized in that, described reinforced mesh or stirrup are independently placed in described sleeper concrete block (2), to improve the intensity of described sleeper concrete block (2).

7. be applicable to the concrete filled steel tube sleeper of non-fragment orbit as claimed in claim 6, it is characterized in that, the bending stiffness EI of described concrete filled steel tube sleeper _zfollowing design formulas is adopted to obtain:

${\mathrm{EI}}_Z=\frac{8{\mathrm{Fl}}^3+5{\mathrm{ql}}^4}{384f};$

Wherein, F is the concentrated load that the external world is applied in the middle part of concrete sleeper, and l is standoff distance in stress model, and q is the evenly distributed load that the deadweight of concrete filled steel tube sleeper produces, and f is the maximum deflection displacement of concrete sleeper under load effect.

8. be applicable to the concrete filled steel tube sleeper of non-fragment orbit as claimed in claim 7, it is characterized in that, the torsional stiffness GI of described concrete filled steel tube sleeper _pfollowing design formulas is adopted to obtain:

Wherein, T for being applied to the torque load on sleeper concrete block (2), for the angle of twist per unit length of concrete sleeper under torque load effect.

9. be applicable to the concrete filled steel tube sleeper of non-fragment orbit as claimed in claim 8, it is characterized in that, the bending stiffness of described concrete filled steel tube sleeper is 1145.3kN/m ², torsional stiffness is 61.7kNm ²/ rad.