CN110055827B - Construction method of cutting large-gradient toothed rail railway structure - Google Patents
Construction method of cutting large-gradient toothed rail railway structure Download PDFInfo
- Publication number
- CN110055827B CN110055827B CN201910348023.4A CN201910348023A CN110055827B CN 110055827 B CN110055827 B CN 110055827B CN 201910348023 A CN201910348023 A CN 201910348023A CN 110055827 B CN110055827 B CN 110055827B
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- Prior art keywords
- surface layer
- roadbed
- ballast
- drainage
- roadbed surface
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Classifications
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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
- E01B1/001—Track with ballast
-
- 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
- E01B25/00—Tracks for special kinds of railways
- E01B25/02—Tracks for rack railways
-
- 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)
- Mechanical Engineering (AREA)
- Railway Tracks (AREA)
Abstract
A construction method of a cutting heavy-gradient toothed rail railway structure is used for greatly enhancing the overall stability and anti-skid capability of ballast, ensuring the safety of the heavy-gradient toothed rail railway and having good economical efficiency. The road bed comprises drainage ditches arranged on two lateral sides of the road bed, a road bed surface layer filled between side walls on the inner sides of the drainage ditches on two sides, and ballast filled on the road bed surface layer, wherein a track structure is buried at the top of the ballast. The friction pad fixed by the U-shaped nails is paved between the top surface of the roadbed surface layer and the bottom surface of the ballast, the U-shaped nails are arranged at intervals, the lower parts of the U-shaped nails penetrate through the friction pad to be fixed on the roadbed surface layer, the drainage ditches are of reinforced concrete different-height side wall structures, the inner side walls of the drainage ditches vertically extend upwards to form high side walls, and the roadbed surface layer and the ballast are filled between the high side walls of the drainage ditches at the two sides.
Description
Technical Field
The invention relates to roadbed engineering, in particular to cutting engineering of a high-gradient rack rail railway.
Background
The rack rail is a railway with strong climbing performance, so that the longitudinal slope of the line can be larger, the rack rail generally focuses on the relationship between the train and the track, but the effect of the track and the ballast and the effect of the ballast and the roadbed are also important, for example, when the friction resistance between the ballast and the rolled and flattened roadbed is insufficient, the ballast cannot provide enough effective resistance for the track, and if the roadbed is made into a coarse structure, accumulated water is not easy to remove, and the roadbed structure is softened; ballast stability on both sides of the road surface track under rail forces is also reduced when the grade is high. Therefore, the cutting heavy-gradient toothed rail railway structure and the construction method have important significance, and are beneficial to ensuring the operation safety of heavy-gradient toothed rail railways, the economical efficiency and the environmental protection of toothed rail railway construction and being beneficial to popularization and application.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction method of a cutting heavy-gradient toothed rail railway structure so as to greatly enhance the overall stability and anti-skid capability of ballast, ensure the safety of the heavy-gradient toothed rail railway and have good economy.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention relates to a cutting heavy-gradient toothed rail railway structure, which comprises drainage ditches arranged on two lateral sides of a roadbed, a roadbed surface layer filled between side walls on the inner sides of the drainage ditches on the two sides, and ballast filled on the roadbed surface layer, wherein a track structure is buried at the top of the ballast, friction pads fixed by U-shaped nails are paved between the top surface of the roadbed surface layer and the bottom surface of the ballast, the U-shaped nails are arranged at intervals, and the lower parts of the U-shaped nails penetrate through the friction pads to be fixed in the roadbed surface layer; the drainage ditch is of a reinforced concrete different-height side wall structure, the inner side wall of the drainage ditch extends vertically upwards to form a high side wall, and the roadbed surface layer and ballast are filled between the high side walls of the drainage ditches at the two sides; the top surface of the roadbed surface layer is provided with a drainage gradient which is not less than 4% from the center of the roadbed to two sides;
1.0-2.0m water draining holes are arranged on the high side walls of the drainage ditches at two sides at intervals along the line direction, and the inner ports of the water draining holes correspond to the elevation positions of the top surface part of the roadbed surface layer;
the roadbed surface layer is close to the high side wall side of the drainage ditch, and 3 weight percent of cement is doped into the filler with the width ranging from 0.2 m to 0.5 m;
the construction method comprises the following steps:
(1) cutting is excavated in layers and slope protection is performed in time until the top of the roadbed surface layer is high;
(2) digging a foundation pit of the drainage ditch, constructing the drainage ditch in time, and reserving a drainage hole on a high side wall of the drainage ditch;
(3) after the concrete strength of the drainage ditch reaches 75% of the design strength, excavating a foundation pit between high side walls of the drainage ditch at two sides;
(4) filling roadbed surface layers in layers, wherein 3% of cement by weight is mixed in the filler with the width of 0.2-0.5m close to the high side wall side of the drainage ditch;
(5) paving a friction pad on the top surface of the roadbed surface layer, and tensioning and straightening;
(6) u-shaped nails are inserted into the friction pad at intervals, and the lower parts of the U-shaped nails penetrate through the friction pad to be fixed in the surface layer of the roadbed;
(7) paving ballast on the top of the friction pad and vibrating and compacting to the elevation of the bottom of the track structure;
(8) placing a track structure on the top of the ballast, paving the rest ballast among the track structures, and vibrating for compaction.
The high-friction pad is paved and fixed on the top surface of the flat roadbed surface layer, so that ballast cannot slide on the roadbed surface layer, enough friction resistance can be provided for a track structure, and the inner side walls of the drainage ditches on the two sides of the roadbed are heightened to form high side walls, so that a blocking effect can be achieved on the ballast, the overall stability and the anti-slip capability of the ballast are greatly enhanced, and the safety of a high-gradient toothed rail railway is ensured; the high side wall not only avoids the instability of ballast in the transverse direction of the roadbed, but also reduces the width of the roadbed surface, thereby saving land and reducing cutting excavation quantity, and having good economical efficiency; cement with a certain weight is doped into the roadbed surface filling material in the range of 0.2-0.5m close to the high side wall side of the drainage ditch, so that the roadbed surface filling compaction effect is facilitated, the infiltration of water is reduced, and the infiltration water can be discharged through a drainage hole arranged on the high side wall; the construction method is simple to operate, the quality is easy to control, engineering investment is saved, and the construction method can be popularized and applied on a large scale.
Drawings
The specification includes four drawings as follows:
FIG. 1 is a schematic cross-sectional view of a cutting heavy grade rack rail structure of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1A;
FIG. 3 is an enlarged view of a portion B of FIG. 1;
fig. 4 is a schematic cross-sectional view of a conventional toothed rail railway cutting structure.
The component names and corresponding labels are shown: roadbed surface layer 10, ballast 12, friction pad 13, U-shaped nails 14, drainage ditch 20, water discharge holes 21 and track structure 30.
Description of the embodiments
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
referring to fig. 1, 2 and 3, the cutting high-gradient toothed rail railway structure of the present invention comprises drainage ditches 20 arranged at both lateral sides of a roadbed, a roadbed surface layer 10 filled between side walls at the inner sides of the drainage ditches 20 at both sides, and ballast 12 filled on the roadbed surface layer 10, wherein a track structure 30 is buried at the top of the ballast 12. Friction pads 13 fixed by U-shaped nails 14 are paved between the top surface of the roadbed surface layer 10 and the bottom surface of the ballast 12, the U-shaped nails 14 are arranged at intervals, and the lower parts of the U-shaped nails penetrate through the friction pads 13 and are fixed in the roadbed surface layer 10. The drainage ditches 20 are reinforced concrete different-height side wall structures, the inner side walls of the drainage ditches vertically extend upwards to form high side walls, and the roadbed surface layers 10 and the ballasts 12 are filled between the high side walls of the drainage ditches 20 at the two sides. The friction pad 3 is made of high-friction geotechnical materials, and the durability meets the design requirement. The arrangement of the friction pad 13 prevents the ballast 12 from sliding on the roadbed surface layer 10, so that sufficient frictional resistance can be provided for the track structure 30, and the inner side high side wall of the drainage ditch 20 can play a role in blocking the ballast 12, so that the overall stability and the anti-sliding capability of the ballast are greatly enhanced, and the safety of a high-gradient toothed rail railway is ensured.
Referring to fig. 1, in order to timely drain the water seepage into the drainage ditch 20, the top surface of the roadbed surface layer 10 is provided with a drainage gradient of not less than 4% from the center of the roadbed to two sides, drainage holes 21 are provided on the high side walls of the drainage ditches 20 at two sides along the line direction at intervals of 1.0-2.0m, and the inner ports of the drainage holes 21 correspond to the elevation positions of the top surface of the roadbed surface layer 10. The subgrade surface layer 10 is doped with 3% by weight of cement in the filler with the width ranging from 0.2 m to 0.5m close to the high side wall side of the drainage ditch 20.
Referring to fig. 1, another technical problem to be solved by the present invention is to provide a method for constructing a cutting heavy-gradient rack rail structure, which includes the following steps:
(1) cutting is excavated in layers, and slope protection is performed timely until the top elevation of the roadbed surface layer 10 is reached;
(2) digging a foundation pit of the drainage ditch 20, constructing the drainage ditch 20 in time, and reserving a drain hole 21 on a high side wall of the drainage ditch 20;
(3) after the concrete strength of the drainage ditches 20 reaches 75% of the set strength, excavating foundation pits between high side walls of the drainage ditches 20 at two sides;
(4) filling the roadbed surface layer 10 in layers, wherein 3% of cement by weight is doped in the filler with the width ranging from 0.2 m to 0.5m at the side of the high side wall close to the drainage ditch 20 in the roadbed surface layer 10;
(5) a friction pad 13 is paved on the top surface of the roadbed surface layer 10 and is tensioned and straightened;
(6) the lower parts of the staples 4,U are inserted at intervals on the friction pad 10, and the lower parts of the staples 4 penetrate through the friction pad 13 to be fixed in the roadbed surface layer 10;
(7) paving ballast 12 on the top of the friction pad 13 and vibrating and compacting to the bottom elevation of the track structure 30;
(8) a track structure 30 is placed on top of the ballast 12, and the remaining ballast 12 is paved between the track structures 30 and vibrated to compact.
The construction method is simple to operate, easy to control the quality, beneficial to saving engineering investment and capable of being popularized and applied on a large scale.
The foregoing is intended to illustrate only some of the principles of the method for constructing a cutting heavy grade rack rail structure of the present invention and is not intended to limit the invention to the particular structure and method of construction shown and described, but rather to limit the invention to all modifications and equivalents which may be employed, as defined and intended in the appended claims.
Claims (1)
1. The construction method of the cutting large-gradient toothed rail railway structure comprises drainage ditches (20) arranged on two lateral sides of a roadbed, roadbed surface layers (10) filled between inner side walls of the drainage ditches (20) on two sides, and ballasts (12) filled on the roadbed surface layers (10), wherein a track structure (30) is buried at the tops of the ballasts (12), friction pads (13) fixed by U-shaped nails (14) are paved between the top surface of the roadbed surface layers (10) and the bottom surface of the ballasts (12), the U-shaped nails (14) are arranged at intervals, and the lower parts of the U-shaped nails penetrate through the friction pads (13) to be fixed in the roadbed surface layers (10); the drainage ditch (20) is of a reinforced concrete different-height side wall structure, the inner side wall of the drainage ditch vertically extends upwards to form a high side wall, and the roadbed surface layer (10) and the ballast (12) are filled between the high side walls of the drainage ditches (20) at the two sides;
the top surface of the roadbed surface layer (10) is provided with a drainage gradient which is not less than 4% from the center of the roadbed to two sides; 1.0-2.0m water discharge holes (21) are formed in the high side wall of the drainage ditch (20) at intervals along the line direction, and the inner ports of the water discharge holes (21) correspond to the elevation positions of the top surface part of the roadbed surface layer (10);
the roadbed surface layer (10) is adjacent to the filler of the high side wall side of the drainage ditch (20) with the width ranging from 0.2 m to 0.5m, and 3 weight percent of cement is doped into the filler;
the construction method comprises the following steps:
(1) cutting is excavated in a layered mode, and slope protection is timely carried out until the top of the roadbed surface layer (10) is high;
(2) digging a foundation pit of the drainage ditch (20), constructing the drainage ditch (20) in time, and reserving a drain hole (21) on a high side wall of the drainage ditch (20);
(3) after the concrete strength of the drainage ditches (20) reaches 75% of the set strength, excavating foundation pits between high side walls of the drainage ditches (20) at two sides;
(4) layering and filling a roadbed surface layer (10), wherein 3% of cement by weight is mixed in a filler with the width ranging from 0.2 m to 0.5m at the side of a high side wall close to a drainage ditch (20) on the roadbed surface layer (10);
(5) paving a friction pad (13) on the top surface of the roadbed surface layer (10), and tensioning and straightening;
(6) the friction pad (13) is inserted with U-shaped nails (14) at intervals, and the lower parts of the U-shaped nails (14) penetrate through the friction pad (13) to be fixed in the roadbed surface layer (10);
(7) paving ballast (12) on the top of the friction pad (13) and vibrating and compacting to the bottom elevation of the track structure (30);
(8) a track structure (30) is placed on top of the ballast (12), and the remaining ballast (12) is laid between the track structures (30) and vibrated to compact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910348023.4A CN110055827B (en) | 2019-04-28 | 2019-04-28 | Construction method of cutting large-gradient toothed rail railway structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910348023.4A CN110055827B (en) | 2019-04-28 | 2019-04-28 | Construction method of cutting large-gradient toothed rail railway structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110055827A CN110055827A (en) | 2019-07-26 |
| CN110055827B true CN110055827B (en) | 2023-09-22 |
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| CN201910348023.4A Active CN110055827B (en) | 2019-04-28 | 2019-04-28 | Construction method of cutting large-gradient toothed rail railway structure |
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| CN110055827A (en) | 2019-07-26 |
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