CN108486963A - Non-fragment orbit guarded drainage subgrade bed structure and its laying method - Google Patents
Non-fragment orbit guarded drainage subgrade bed structure and its laying method Download PDFInfo
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- CN108486963A CN108486963A CN201810392164.1A CN201810392164A CN108486963A CN 108486963 A CN108486963 A CN 108486963A CN 201810392164 A CN201810392164 A CN 201810392164A CN 108486963 A CN108486963 A CN 108486963A
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- geotextiles
- polyurethane
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/008—Drainage of track
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of non-fragment orbit guarded drainage subgrade bed structures, including the bottom layer of subgrade being arranged from the bottom to top, level-one geotextiles, surface layer of subgrade bed, base board, track plates, it further include the confining bed for being set to base board both sides, between the confining bed and surface layer of subgrade bed, waterproof/drainage structure is equipped between base board and surface layer of subgrade bed, the waterproof/drainage structure includes the polyurethane metalling set gradually from the bottom to top, two level geotextiles, the invention also discloses a kind of laying methods of non-fragment orbit guarded drainage subgrade bed structure, the level-one geotextiles are the double-deck geotextiles, two level geotextiles include the composite earthwork cloth being set under base board and the double-deck geotextiles that are set under confining bed.Not only there is good mechanics and water stabilizing in the present invention, but also obstruct rainwater and internally permeate, extend the service life of track, prevent water from penetrating into road structure and road structure is damaged, improve the guarded drainage performance of road structure.
Description
Technical field
The present invention relates to railroad track technical fields, in particular to a kind of non-fragment orbit guarded drainage subgrade bed knot
Structure and its laying method.
Background technology
In recent years, China express railway rapidly develops, and roadbed is the basis of track, as railway line substructure, puts down
Pliable, uniformity and long-time stability are most important for certain bullet train safe operation.Bedding table in subgrade bed structure
Layer is acted on maximum by dynamic stress, and is easy to be influenced by extraneous rainwater factor.As shown in Figure 1, existing subgrade bed structure packet
The bottom layer of subgrade to lower and upper setting, surface layer of subgrade bed, base board, track plates are included, the base board both sides are equipped with confining bed.
Under the conditions of existing Subgrade bed design, surface layer of subgrade bed cannot achieve under unsaturated state effectively again when rainfall infiltration
Draining, causes surface layer of subgrade bed to progressively reach saturation state, and the soap-free emulsion polymeization graded broken stone material after compacting is separated at base board,
It causes surface layer of subgrade bed face particle confinement inadequate, disease of rising soil is gradually formed under the action of dynamic load.
Invention content
The main purpose of the present invention is to provide non-fragment orbit guarded drainage subgrade bed structure and its laying methods, to solve
The undesirable problem of subgrade bed structure guarded drainage effect in the prior art.
Non-fragment orbit guarded drainage subgrade bed structure, including the bottom layer of subgrade, level-one geotextiles, the bedding that are arranged from the bottom to top
Surface layer, base board, track plates further include the confining bed for being set to base board both sides, between the confining bed and surface layer of subgrade bed, bottom
Waterproof/drainage structure is equipped between seat board and surface layer of subgrade bed, the waterproof/drainage structure includes that the polyurethane that sets gradually from the bottom to top is broken
Rock layers, two level geotextiles, the level-one geotextiles are the double-deck geotextiles, two level geotextiles include be set to it is compound under base board
Geotextiles and the double-deck geotextiles being set under confining bed.
Waterproof construction of the polyurethane gelling rubble as surface layer of subgrade bed, not only has good mechanics and water steady in the present invention
It is qualitative can, and obstruct rainwater and internally permeate, the double-deck geotextiles under confining bed confining bed and polyurethane metalling from
And drainage channel is formed, thus water is discharged from drainage channel between two layers of geotextiles, is arranged in base board and polyurethane metalling
Composite earthwork cloth plays waterproof action, ensure that base board and the contact of polyurethane rubble level are good, pedestal plate temperature is avoided to answer
Interlayer gap caused by power enters to eliminate moisture, prevents the water damage formed by interlayer seam, advancing the track from using the longevity
It orders, the water in ground cannot also be migrated by the partition of waterproof binder course upwards, to form " upper lower section stifled ", the guarded drainage of closure
Structure prevents water from penetrating into road structure and is damaged to road structure, improves the guarded drainage performance of road structure.
Further, the polyurethane metalling is the knot mixed by two-component polyurethane adhesive water and graded broken stone
Structure, wherein the two-component polyurethane adhesive water by glue and catalyst according to 1:1 mass ratio mixes.Thus the double groups of gained
The guarded drainage performance of part polyurethane glue is more preferable, the waterproof/drainage structure in the subgrade bed structure the present invention.
Further, the volume of two-component polyurethane adhesive water is 8%-10% in polyurethane metalling.The two-component
Polyurethane glue volume is 8%-10%.So that polyurethane metalling reaches, barrier properties are good, early strength is high, construction is simple
Fast, performance is stable, temperature stability is reliable, ductility is good and other effects.The polyurethane glue volume makes for 8%-10%
The good fluidity of manufactured polyurethane rubble is paved into metalling conducive to polyurethane rubble.
Further, the thickness of the polyurethane metalling is 0.02m-0.03m.Ensureing poly- ammonia under the thickness range
In the case that the waterproof effect of ester metalling is optimal, construction cost is minimum.
Further, the graded broken stone for constituting the polyurethane metalling is nonuniformity coefficient >=20 and coefficient of curvature is 1-
1.5 graded broken stone.The barrier performance for the polyurethane metalling that graded broken stone under the performance is constituted is best.
Further, the polyurethane glue normality adhesive strength >=2.5Mpa, soak adhesive strength >=1.9Mpa.Thus
Ensure the polyurethane metalling barrier properties constituted, early strength, structural stability.
Further, two-component polyurethane adhesive water mixes presetting period≤3h of gained mixture, solidification with graded broken stone
Time≤for 24 hours, compression strength is higher than 12MPa, and -30 DEG C~60 DEG C moduluses of resilience are higher than 800MPa, infiltration coefficient≤10-6M/s, hole
Gap rate≤3.5%.
The present invention also provides non-fragment orbit guarded drainage subgrade bed structure laying methods, include the following steps：
(1) prepare material equipment；
(2) it is arranged and cleans bottom layer of subgrade, level-one geotextiles is laid on bottom layer of subgrade；
(3) it is laid with graded broken stone surface layer of subgrade bed, and surface layer of subgrade bed is rolled, Beat numbers；
(4) polyurethane rubble is prepared：First controllable temperature particle blender temperature is controlled at 15~20 DEG C, then by two-component
Polyurethane glue pours into controllable temperature particle blender, pours into designed graded broken stone again later and stirs 3~5min, obtains double groups
The mixture of part polyurethane glue and graded broken stone ensures that blender is constantly in rotation status in work progress；
(5) polyurethane metalling is laid on surface layer of subgrade bed：By the mixture being stirred be poured on surface layer of subgrade bed and with length
Floating rule shakeouts, and spice step is repeated, until paving until specific thickness；
(6) rubble of surface layer of subgrade bed is polished：Polyurethane metalling before initial set, does not spray one layer on polyurethane metalling
Epoxy resin glue, re-lays two level geotextiles later, and two level geotextiles include being set to the composite earthwork cloth and two at middle part
The double-deck geotextiles of side；
(7) cast-in-place concrete confining bed in the double-deck geotextiles in two level geotextiles, it is compound in two level geotextiles
Base board is set in geotextiles, setting and track plates on base board.
Further, in step (4) glue and solid catalyst according to 1:1 mass ratio is poured into particle blender and is stirred
It mixes to obtain two component polyurethane glue.
As it can be seen that waterproof construction of the polyurethane gelling rubble as surface layer of subgrade bed in the present invention, not only has good mechanics
And water stabilizing, and obstruct rainwater and internally permeate, the double-deck geotextiles under confining bed are broken in confining bed and polyurethane
Rock layers are to form drainage channel, and thus water is discharged from drainage channel between two layers of geotextiles, in base board and polyurethane rubble
Layer setting composite earthwork cloth plays waterproof action, ensure that base board and the contact of polyurethane rubble level are good, avoids base board
Interlayer gap caused by temperature stress enters to eliminate moisture, prevents the water damage formed by interlayer seam, advancing the track from making
With the service life, the water in ground cannot also be migrated by the partition of waterproof binder course upwards, and to form " upper lower section stifled ", closure is prevented
Discharge structure prevents water from penetrating into road structure and is damaged to road structure, improves the guarded drainage performance of road structure.
The present invention is described further with reference to the accompanying drawings and detailed description.The additional aspect of the present invention and excellent
Point will be set forth in part in the description, and partly will become apparent from the description below, or practice through the invention
It solves.
Description of the drawings
The attached drawing for constituting the part of the present invention is used for assisting the understanding of the present invention, content provided in attached drawing and its
Related explanation can be used for explaining the present invention in the present invention, but not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of this subgrade bed structure in the prior art.
Fig. 2 is the schematic diagram of non-fragment orbit guarded drainage subgrade bed structure of the present invention.
Fig. 3 is the structural schematic diagram of waterproof/drainage structure in the present invention.
Related label in above-mentioned attached drawing be：
1：Bottom layer of subgrade；
2：Surface layer of subgrade bed；
3：Base board；
310：Cement asphalt mortar layer；
4：Track plates；
5：Level-one building cloth；
6：Confining bed；
7：Cast-in-place concrete structure；
8：Cable trough；
9：Gravel hardcore；
910：Drain hole；
10：Waterproof/drainage structure；
101：Two level geotextiles；
102：Epoxy resin adhesive coating；
103：Polyurethane metalling.
Specific implementation mode
Clear, complete explanation is carried out to the present invention below in conjunction with the accompanying drawings.Those of ordinary skill in the art are based on these
The present invention will be realized in the case of explanation.Before in conjunction with attached drawing, the present invention will be described, of particular note is that：
Technical solution and technical characteristic in the present invention provided in each section including following the description are not being rushed
In the case of prominent, these technical solutions and technical characteristic can be combined with each other.
In addition, the embodiment of the present invention arrived involved in following the description is generally only the embodiment of a branch of the invention, and
The embodiment being not all of.Therefore, based on the embodiments of the present invention, those of ordinary skill in the art are not making creativeness
The every other embodiment obtained under the premise of labour, should all belong to the scope of protection of the invention.
About term in the present invention and unit.Term in description and claims of this specification and related part
" comprising ", " having " and their any deformation, it is intended that cover and non-exclusive include.Term in the present invention is " compound
Geotextiles " refer to having added a fluid-tight film between exactly two layers of geotextiles, play waterproof and drainage；" the double-deck geotechnique
Cloth " refers to that two geotextiles stack, and plays the role of draining.
Non-fragment orbit guarded drainage subgrade bed structure of the present invention, including be arranged from the bottom to top bottom layer of subgrade 1, level-one geotechnique
Cloth, surface layer of subgrade bed 2, base board 3, track plates 4 further include the confining bed 6 for being set to 3 both sides of base board, the confining bed 6 and base
Between bed surface layer 2, be equipped with waterproof/drainage structure 10 between base board 3 and surface layer of subgrade bed 2, the waterproof/drainage structure 10 include by down toward
On set gradually polyurethane metalling 103, two level geotextiles, the level-one geotextiles are the double-deck geotextiles, two level geotextiles
Including the composite earthwork cloth being set under base board 3 and the double-deck geotextiles being set under confining bed 6.
Further, the polyurethane metalling 103 is mixed by two-component polyurethane adhesive water with graded broken stone
Structure, wherein the two-component polyurethane adhesive water by glue and catalyst according to 1:1 mass ratio mixes.
Further, the volume of two-component polyurethane adhesive water is 8%-10% in polyurethane metalling 103.
Further, the thickness of the polyurethane metalling 103 is 0.02m-0.03m.
Further, the graded broken stone for constituting the polyurethane metalling 103 is nonuniformity coefficient >=20 and coefficient of curvature
For the graded broken stone of 1-1.5.
Further, the polyurethane glue normality adhesive strength >=2.5Mpa, soak adhesive strength >=1.9Mpa.
Further, two-component polyurethane adhesive water mixes presetting period≤3h of gained mixture, solidification with graded broken stone
Time≤for 24 hours, compression strength is higher than 12MPa, and -30 DEG C~60 DEG C moduluses of resilience are higher than 800MPa, infiltration coefficient≤10-6M/s, hole
Gap rate≤3.5%.
Non-fragment orbit guarded drainage subgrade bed structure laying method, includes the following steps：
(1) prepare material equipment；
(2) it is arranged and cleans bottom layer of subgrade, level-one geotextiles is laid on bottom layer of subgrade；
(3) it is laid with graded broken stone surface layer of subgrade bed, and surface layer of subgrade bed is rolled, Beat numbers；
(4) polyurethane rubble is prepared：First controllable temperature particle blender temperature is controlled at 15~20 DEG C, then by two-component
Polyurethane glue pours into controllable temperature particle blender, pours into designed graded broken stone again later and stirs 3~5min, obtains double groups
The mixture of part polyurethane glue and graded broken stone ensures that blender is constantly in rotation status in work progress；
(5) polyurethane metalling is laid on surface layer of subgrade bed：By the mixture being stirred be poured on surface layer of subgrade bed and with length
Floating rule shakeouts, and spice step is repeated, until paving until specific thickness；
(6) rubble of surface layer of subgrade bed is polished：Polyurethane metalling before initial set, does not spray one layer on polyurethane metalling
Epoxy resin glue, re-lays two level geotextiles later, and two level geotextiles include being set to the composite earthwork cloth and two at middle part
The double-deck geotextiles of side；
(7) cast-in-place concrete confining bed in the double-deck geotextiles in two level geotextiles, it is compound in two level geotextiles
Base board is set in geotextiles, setting and track plates on base board.
Glue and solid catalyst are according to 1 in step (4):1 mass ratio pour into particle blender stir to get it is double
Part polyurethane glue.
As shown in FIG. 2 and 3, non-fragment orbit guarded drainage subgrade bed structure, non-fragment orbit in present embodiment
Guarded drainage subgrade bed structure, including be arranged from the bottom to top bottom layer of subgrade 1, level-one geotextiles, surface layer of subgrade bed 2, base board 3,
Track plates 4 further include the confining bed 6 for being set to 3 both sides of base board, between the confining bed 6 and surface layer of subgrade bed 2, base board 3 with
Waterproof/drainage structure 10 is equipped between surface layer of subgrade bed 2, the waterproof/drainage structure 10 is broken including the polyurethane set gradually from the bottom to top
Rock layers 103, two level geotextiles, the level-one geotextiles are the double-deck geotextiles, and two level geotextiles include being set under base board 3
Composite earthwork cloth and the double-deck geotextiles being set under confining bed 6.2 side of the surface layer of subgrade bed is equipped with cast-in-place concrete structure
7 and cable trough 8,7 outside of the cast-in-place concrete structure is equipped with 9 interstitital texture of gravel hardcore, the filling knot of gravel hardcore 9
Structure is equipped with drain hole 910.
Wherein, the polyurethane metalling 103 is the structure that two-component polyurethane adhesive water is mixed with graded broken stone, institute
It is 8% to state two-component polyurethane adhesive water volume.The thickness of the polyurethane metalling 103 is 0.02m.It is broken to constitute the polyurethane
The graded broken stone that the graded broken stone of rock layers 103 is nonuniformity coefficient >=20 and coefficient of curvature is 1-1.5.The polyurethane glue is normal
State adhesive strength >=2.5Mpa, soak adhesive strength >=1.9Mpa.The polyurethane metalling 103 and two level geotextiles 101 it
Between be bonded be connected.It is be bonded by epoxy resin adhesive coating 102 between the polyurethane metalling 103 and two level geotextiles 101.
The surface layer of subgrade bed 2 is made of graded broken stone.The thickness for constituting the surface layer of subgrade bed 2 is 0.4m-0.6m.The drain hole 910
A diameter of 100mm.The thickness of the epoxy resin adhesive coating 102 is 2mm.
Wherein two-component polyurethane adhesive water by A and B component according to mixing quality 1:1 mixes, and component A is glue；Group
It is solid catalyst to divide B.In order to make the polyurethane macadam-aggregate mix of transition zone that there is enough intensity, the dual-component polyurethane
Glue normality adhesive strength >=2.5Mpa, soak adhesive strength >=1.9Mpa.
The work progress of non-fragment orbit guarded drainage subgrade bed structure of the present invention is as follows：
(1) prepare material equipment；
(2) bottom layer of subgrade is cleaned, level-one geotextiles are laid with；
(3) it uses graded broken stone to be laid with the surface layer of subgrade bed of 0.4m thickness, rolls, Beat numbers；
(4) polyurethane rubble is prepared：First controllable temperature particle blender temperature is controlled at 15~20 DEG C, then by component A
It is poured into particle blender with component B and stirs 50s, then poured into designed 0.02m graded broken stones and stir 3~5min, you can gone out
Material.Ensure that blender is constantly in rotation status in work progress, glues pot to prevent polyurethane rubble.
(5) polyurethane metalling is laid on surface layer of subgrade bed：By the mixture being stirred be poured on surface layer of subgrade bed and with length
Floating rule shakeouts, and spice step is repeated, until paving until specific thickness；
(6) rubble for polishing surface layer of subgrade bed, (present embodiment before polyurethane metalling is not pre-hardening under the grading
In be 2.5 hours), and on surface layer of subgrade bed spray one layer of 2mm thickness epoxy resin glue；And in after ten minutes in laying two level
Geotextiles, thus epoxy resin adhesive coating two level geotextiles are bonded on polyurethane metalling, two level geotextiles include
It is set to the composite earthwork cloth at middle part and the double-deck geotextiles of both sides；
(7) cast-in-place concrete confining bed in the double-deck geotextiles in two level geotextiles, it is compound in two level geotextiles
Base board is set in geotextiles, setting and track plates on base board.
(8) cable trough and cast-in-place concrete block are nearby filled using gravel hardcore, and letting out for Φ 100mm is arranged in bottom
Water hole；
The present invention does not require construction environment temperature, humidity, while laying method rapid and convenient.
In present embodiment under the performance indicator of two-component polyurethane adhesive water such as table 1：
Table 1
The grading selection of the graded broken stone of above-mentioned composition polyurethane metalling is as shown in table 2 below：
Table 2
It is the grade of 1-1.5 from there through macadam gradating manufacture acquisition nonuniformity coefficient >=20 in upper table 2 and coefficient of curvature
With rubble.
The process for preparing polyurethane rubble is as follows：First at 15~20 DEG C, then controllable temperature particle blender temperature is controlled
Two-component polyurethane adhesive water is poured into particle blender and stirs 50s, then pour into designed 0.02m graded broken stones stirring 3~
5min, you can discharging.Ensure that blender is constantly in rotation status in work progress, glues pot to prevent polyurethane rubble.
The polyurethane rubble being finally made of above-mentioned two-component polyurethane adhesive water and graded broken stone has the property that：Poly- ammonia
Presetting period≤3 hour of ester rubble；Hardening time≤24 hour；Compression strength is higher than 12MPa；- 30 DEG C -60 DEG C rebound moulds
Amount is higher than 800MPa；Infiltration coefficient is not more than 10-6m/s；Porosity is not more than 3.5%.
In this embodiment, field test section is sampled detection, and sample detection temperature is 28 DEG C, testing result
It is as follows：Polyurethane macadam-aggregate mix initial setting strength is 10MP；Adhesion strength is 3.22MP under polyurethane glue normality；Polyurethane adhesive
The underwater adhesion strength of water logging is 2.14MPa；The flexural strength of polyurethane metalling is 4.01MPa；Polyurethane rubble layer porosity
It is 2.87%；Polyurethane metalling infiltration coefficient is 10-6m/s；Polyurethane metalling resists the strong modulus of resilience to be 670MPa；Polyurethane
The Compressive Strength of metalling is 16.3MPa
The related content of the present invention is illustrated above.Those of ordinary skill in the art are in the feelings illustrated based on these
The present invention will be realized under condition.Based on the above of the present invention, those of ordinary skill in the art are not making creativeness
The every other embodiment obtained under the premise of labour, should all belong to the scope of protection of the invention.
Claims (9)
1. non-fragment orbit guarded drainage subgrade bed structure, including the bottom layer of subgrade (1), level-one geotextiles, the base that are arranged from the bottom to top
Bed surface layer (2), base board (3), track plates (4), further include the confining bed (6) for being set to base board (3) both sides, feature exists
In, between the confining bed (6) and surface layer of subgrade bed (2), between base board (3) and surface layer of subgrade bed (2) be equipped with waterproof/drainage structure
(10), the waterproof/drainage structure (10) includes the polyurethane metalling (103) set gradually from the bottom to top, two level geotextiles, institute
It is the double-deck geotextiles to state level-one geotextiles, and two level geotextiles include composite earthwork cloth and the setting being set under base board (3)
The double-deck geotextiles under confining bed (6).
2. non-fragment orbit guarded drainage subgrade bed structure as described in claim 1, which is characterized in that the polyurethane metalling
(103) be the structure mixed by two-component polyurethane adhesive water and graded broken stone, wherein the two-component polyurethane adhesive water by
Glue and catalyst are according to 1:1 mass ratio mixes.
3. non-fragment orbit guarded drainage subgrade bed structure as claimed in claim 2, which is characterized in that in polyurethane metalling
(103) volume of two-component polyurethane adhesive water is 8%-10% in.
4. non-fragment orbit guarded drainage subgrade bed structure as claimed in claim 2, which is characterized in that the polyurethane metalling
(103) thickness is 0.02m-0.03m.
5. non-fragment orbit guarded drainage subgrade bed structure as claimed in claim 2, which is characterized in that it is broken to constitute the polyurethane
The graded broken stone that the graded broken stone of rock layers (103) is nonuniformity coefficient >=20 and coefficient of curvature is 1-1.5.
6. non-fragment orbit guarded drainage subgrade bed structure as claimed in claim 2, which is characterized in that the polyurethane glue is normal
State adhesive strength >=2.5Mpa, soak adhesive strength >=1.9Mpa.
7. non-fragment orbit guarded drainage subgrade bed structure as described in claim 1, which is characterized in that two-component polyurethane adhesive water
Mix presetting period≤3h of gained mixture, hardening time≤for 24 hours with graded broken stone, compression strength is higher than 12MPa, -30 DEG C
~60 DEG C of moduluses of resilience are higher than 800MPa, infiltration coefficient≤10-6M/s, porosity≤3.5%.
8. non-fragment orbit guarded drainage subgrade bed structure laying method, which is characterized in that include the following steps：
(1) prepare material equipment；
(2) it is arranged and cleans bottom layer of subgrade, level-one geotextiles is laid on bottom layer of subgrade；
(3) it is laid with graded broken stone surface layer of subgrade bed, and surface layer of subgrade bed is rolled, Beat numbers；
(4) polyurethane rubble is prepared：First controllable temperature particle blender temperature is controlled at 15~20 DEG C, then by the poly- ammonia of two-component
Ester gum water pours into controllable temperature particle blender, pours into designed graded broken stone again later and stirs 3~5min, it is poly- to obtain two-component
The mixture of urethane glue and graded broken stone ensures that blender is constantly in rotation status in work progress；
(5) polyurethane metalling is laid on surface layer of subgrade bed：The mixture being stirred is poured on surface layer of subgrade bed and with long floating rule
It shakeouts, spice step is repeated, until paving until specific thickness；
(6) rubble of surface layer of subgrade bed is polished：Polyurethane metalling before initial set, does not spray one layer of epoxy on polyurethane metalling
Resin glue, re-lays two level geotextiles later, and two level geotextiles include being set to composite earthwork cloth and the both sides at middle part
The double-deck geotextiles；
(7) cast-in-place concrete confining bed in the double-deck geotextiles in two level geotextiles, the composite earthwork in two level geotextiles
Base board is set on cloth, setting and track plates on base board.
9. such as claim 8 non-fragment orbit guarded drainage subgrade bed structure laying method, which is characterized in that the glue in step (4)
Water and solid catalyst are according to 1:1 mass ratio, which pours into particle blender, stirs to get two component polyurethane glue.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810392164.1A CN108486963B (en) | 2018-04-27 | 2018-04-27 | Ballastless track waterproof roadbed bed structure and paving method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810392164.1A CN108486963B (en) | 2018-04-27 | 2018-04-27 | Ballastless track waterproof roadbed bed structure and paving method thereof |
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| CN108486963B CN108486963B (en) | 2023-08-01 |
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| CN110364958A (en) * | 2019-06-19 | 2019-10-22 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A method of laying cable trough on roadbed |
| CN111560799A (en) * | 2019-11-18 | 2020-08-21 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Roadbed heat insulation structure in frozen soil area, construction method and application |
| CN111576093A (en) * | 2020-05-07 | 2020-08-25 | 神华包神铁路集团有限责任公司 | Structure for treating railway slurry pumping and construction method |
| CN112127216A (en) * | 2020-09-30 | 2020-12-25 | 武汉理工大学 | Prefabricated assembly type asphalt substrate type ballastless track and construction method thereof |
| WO2021005015A1 (en) * | 2019-07-11 | 2021-01-14 | Hyperion Verwaltung Gmbh | Ballast-plastic composite body |
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| CN110364958A (en) * | 2019-06-19 | 2019-10-22 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A method of laying cable trough on roadbed |
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| CN111560799A (en) * | 2019-11-18 | 2020-08-21 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Roadbed heat insulation structure in frozen soil area, construction method and application |
| CN111560799B (en) * | 2019-11-18 | 2022-07-01 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Roadbed heat insulation structure in frozen soil area, construction method and application |
| CN111576093A (en) * | 2020-05-07 | 2020-08-25 | 神华包神铁路集团有限责任公司 | Structure for treating railway slurry pumping and construction method |
| CN112127216A (en) * | 2020-09-30 | 2020-12-25 | 武汉理工大学 | Prefabricated assembly type asphalt substrate type ballastless track and construction method thereof |
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