CN105002789A - High speed railway roadbed structure passing through fault zone - Google Patents
High speed railway roadbed structure passing through fault zone Download PDFInfo
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- CN105002789A CN105002789A CN201510490955.4A CN201510490955A CN105002789A CN 105002789 A CN105002789 A CN 105002789A CN 201510490955 A CN201510490955 A CN 201510490955A CN 105002789 A CN105002789 A CN 105002789A
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- roadbed
- widen
- high speed
- speed railway
- fault zone
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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
- E01B2/00—General structure of permanent way
- E01B2/006—Deep foundation of tracks
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/07—Drainage
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a high speed railway roadbed structure passing through a fault zone. The high speed railway roadbed structure is formed by combination of a widen roadbed and a roadbed inner layering structure; a foundation settlement deformation observing system is arranged at the bottom of the widen roadbed; the road shoulder of the widen roadbed is widened to be not smaller than 1 m; the roadbed inner layering structure comprises a geogrid and a dust sealing layer which are laid in a bulk filling in a layering manner; the distance between every two layers of the geogrid is 0.3-0.6 m; the thickness of the dust sealing layer is 0.5-1.0 m. The widths of a widen side gutter platform and a widen side slope platform of the excavated roadbed structure are respectively not smaller than 3 m; the side slope gradient is reduced to be 1:1.75. The excavated roadbed structure further comprises a composite geomembrane and blind drains; the composite geomembrane is arranged on the dust sealing layer on a roadbed base; the blind drains are arranged below side gutters on two sides of the composite geogrid; the widths of the blind drains are not smaller than 1 m. The integrality of the roadbed bulk filling structure is improved, the high speed railway roadbed structure adapts to fault zone deformation, the excessive strain cracking of the roadbed in an earthquake is reduced, a line in the operation stage is guaranteed to be unblocked and safe, and the design and operation risks are reduced.
Description
Technical field
The present invention relates to railway bed structure, particularly relate to the railway bed structure in fault zone location.
Background technology
The control of high-speed railway lay special stress on subgrade deformation, in order to ensure train high speed, safety and even running, road structure should have enough intensity, stability and durability.Owing to being subject to impact and the control of the factor such as various landform and earth's surface building, high-speed railway circuit has to pass through fault zone.The geologic structure in fault zone location is complicated, rock stratum state and rock and soil properties changeable, cranny development and moisture content large, topography variation and buried depth of bedrock abnormal, part location also has certain mobility.Therefore, the high ferro roadbed in fault zone location will have certain rigidity, structural integrity will be got well, both under having ensured non-earthquake conditions, subgrade deformation met safe operation requirement, reduce the subgrade deformation risk that excessive sedimentation causes again as far as possible, meanwhile, also want to adapt to fault zone when earthquake to be out of shape, easily to repair and leave repairing condition etc.
Existing railway bed structure is shot filling body structure, and the ground after clear table or process fills shot roadbed filling, and width of the subgrade surface is the normal width adapting to track basic demand.
Fig. 1 and Fig. 2 shows the filled-up ground of prior art and the road structure of cut subgrade respectively.
The road structure of the filled-up ground shown in Fig. 1 be the natural ground 5 after leveling ground on fill shot roadbed filling 4, its road bed is the standard road bed 1 with standard shoulder width, the side slope 3 ' of roadbed both sides extends to natural ground 5 from the both sides of standard road bed 1 are oblique downwards, and the slope of side slope 3 ' is 1:1.5.
The road structure of the cut subgrade shown in Fig. 2 fills shot roadbed filling 4 on the ground lower than natural ground 5 excavated, its road bed is the standard road bed 1 with standard shoulder width, lateral sulcus 13 and lateral sulcus platform 9 are excavated in roadbed both sides, the side slope 3 of roadbed both sides is oblique from the lateral of lateral sulcus platform 9 extends to ground 5, the slope of side slope 3, depending on strata condition, is 1:1.5 ~ 1:0.5.
Existing railway shot filling body road structure globality is poor, and under earthquake and fault zone deformation, subgrade deformation is large, easy to crack, and meanwhile, without repairing condition after earthquake, this runs to the high-speed railway passing through fault zone and maintenance brings difficulty and hidden danger.
Summary of the invention
There is the high-speed railway maintenance difficulty of passing through fault zone in the road structure for the shot filling body of prior art, there is hidden danger in operation, the present invention releases a kind of novel High Speed Railway Subgrade by fault zone, by the road bed widened, hierarchy in roadbed, foundation settlement deformation observation system combines, to provide the subgrade structure with good integrity and stability, adapt to uneven settlement of foundation, prevent bedding from rising soil and frost failure, fault zone settlement of foundation can be monitored in time and carry out early warning and the alarm that exceeds standard, and there is repairing condition.
A kind of High Speed Railway Subgrade by fault zone of the present invention, comprise the road structure of filled-up ground and cut subgrade, it is characterized by and combined by hierarchy, foundation settlement deformation observation system in widening road bed and roadbed, foundation settlement deformation observation system is arranged on bottom roadbed.
Described widening road bed, for widening curb, is widened curb and respectively widen the width being not less than 1m on former shoulder width basis.
In described roadbed, hierarchy is included in geo-grid, the dirt confining bed that in shot filling body, layering is laid.Geo-grid place Min layers is located in shot filling body, and every interlayer is every 0.3 ~ 0.6m; Dirt confining bed is that the ground after compacting process rams the grey soil layer filled out, dirt enclosed layer thickness 0.5 ~ 1.0m.The geo-grid of laying improves globality and the stability of shot filling body.
Described foundation settlement deformation observation system comprises multi-point layered sedimentation and takes into account inclinometer pipe, and multi-point layered settlement gauge is embedded in roadbed bottom centre and toe both sides, and inclinometer pipe is embedded in toe both sides.Multi-point displacement settlement gauge is made up of anchor head, connecting rod, sensor, conduit, and inclinometer pipe is built with acceleration transducer.Each observation element observation data is pooled in observation well by transmission cable, so that data acquisition, adopts multichannel engineering test instrument to carry out automatic measurement, carries out remote data acquisition by signal receiving device.
For the road structure of cut subgrade, described widening road bed also comprises to be widened lateral sulcus platform, widens plain stage of slope, widen lateral sulcus platform and widen plain stage of slope and widen the width being not less than 1m respectively on original lateral sulcus platform, plain stage of slope basis, lateral sulcus platform after widening, plain stage of slope width are not less than 3m, grade of side slope slows down to 1:1.75, and classification slope height is not more than 6m.Widen lateral sulcus platform and widen maintenance vehicle when plain stage of slope meets seismic damage and pass through, leave repairing condition.
For the road structure of cut subgrade, in described roadbed, hierarchy also comprises and arranges composite geo-membrane and blind drain.Composite geo-membrane is arranged on the suprabasil dirt confining bed of roadbed, and composite geo-membrane lays thick 0.1m medium coarse sand bed course up and down respectively.Arrange blind drain under the lateral sulcus of composite geo-membrane both sides, blind drain width is not less than 1m, and the soakaway trench buried depth in blind drain is not higher than 0.2m below composite geo-membrane end face, and soakaway trench diameter is not less than 0.3m.The setting of blind drain, in order to dewatering, is got rid of the surface water and groundwater oozed under road bed, and is cut off underground water rising passway, rises soil and the threat of frost failure to reduce subgrade bed.
A kind of High Speed Railway Subgrade by fault zone that the present invention relates to, improve the globality of roadbed bulk solid structure, adapt to fault zone distortion, the strain cracking that during reduction earthquake, roadbed is excessive, subgrade bed can be affected dewatering, reduce bedding to rise soil and frost failure, ensure the unimpeded and safety of circuit operation stage, reduce design and operations risks.
Accompanying drawing explanation
Fig. 1 is the filled-up ground structure transverse sectional view of prior art;
Fig. 2 is the cut subgrade structure transverse sectional view of prior art;
Fig. 3 is the filled-up ground structure transverse sectional view that the present invention relates to;
Fig. 4 is the cut subgrade structure transverse sectional view that the present invention relates to.
Description of symbols in figure:
1, standard road bed 2, widen curb
3 ', fill subgrade side slope 3, cut subgrade side slope
4, shot roadbed filling 5, natural ground
6, geo-grid 7, dirt confining bed
8, foundation settlement deformation observation system 9, lateral sulcus platform
10, plain stage of slope 11, composite geo-membrane
12, blind drain 13, lateral sulcus
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is described further.
Fig. 3 shows the lateral cross section of the filled-up ground structure that the present invention relates to, and comprises hierarchy in widening road bed and roadbed.
The widening road bed of the structure of filled-up ground shown in Fig. 3 comprises widens curb 2, and the shoulder width widening curb 2 widens the width being not less than 1m than former curb.
In roadbed shown in Fig. 3, hierarchy comprises layering in the shot filling body that filled by shot roadbed filling 4 and lays geo-grid 6, dirt confining bed 7.Geo-grid 6 place Min layers is located in shot filling body, and every interlayer is every 0.3 ~ 0.6m; Dirt confining bed 7 is that the ground after compacting process rams the grey soil layer filled out, dirt confining bed 7 thickness 0.5 ~ 1.0m.
Fig. 4 shows the view in transverse section of the cut subgrade structure that the present invention relates to, and comprises hierarchy in widening road bed and roadbed.
The widening road bed of the structure of cut subgrade shown in Fig. 4 comprises widens curb 2, and the shoulder width widening curb 2 widens the width being not less than 1m than former curb.
The widening road bed of the structure of cut subgrade shown in Fig. 4 also comprises the lateral sulcus platform 9 widened, the plain stage of slope 10 widened, the lateral sulcus platform 9 widened and the plain stage of slope 10 widened widen the width being not less than 1m respectively on original lateral sulcus platform, plain stage of slope basis, and the lateral sulcus platform 9 after widening, the width of plain stage of slope 10 are not less than 3m respectively; The gradient of cut subgrade side slope 3 slows down to 1:1.75, and classification slope height is not more than 6m.
In the roadbed of the structure of cut subgrade shown in Fig. 4, hierarchy comprises layering in the shot filling body that filled by shot roadbed filling 4 and lays geo-grid 6, dirt confining bed 7.Geo-grid 6 place Min layers is located in shot filling body, and every interlayer is every 0.3 ~ 0.6m; Dirt confining bed 7 is that the ground after compacting process rams the grey soil layer filled out, dirt confining bed 7 thickness 0.5 ~ 1.0m.
In the roadbed of the structure of cut subgrade shown in Fig. 4, hierarchy also comprises and arranges composite geo-membrane 11 and blind drain 12.Composite geo-membrane 11 is arranged on the suprabasil dirt confining bed 7 of roadbed, and composite geo-membrane about 11 lays thick 0.1m medium coarse sand bed course respectively.Composite geo-membrane 11 both sides lateral sulcus arranges blind drain 12 13 times, and the width of blind drain 12 is not less than 1m, and the soakaway trench buried depth in blind drain 12 is not higher than 0.2m below composite geo-membrane 11 end face, and soakaway trench diameter is not less than 0.3m.
Bottom the roadbed that Fig. 3 and Fig. 4 shows the road structure that the present invention relates to, foundation settlement deformation observation system 8 is set, foundation settlement deformation observation system 8 comprises multi-point layered sedimentation and takes into account inclinometer pipe, multi-point layered settlement gauge is embedded in roadbed bottom centre and toe both sides, and inclinometer pipe is embedded in toe both sides.Each observation element observation data is pooled in observation well by transmission cable, so that data acquisition, adopts multichannel engineering test instrument to carry out automatic measurement, carries out remote data acquisition by signal receiving device.
Now road structure work progress provided by the invention is described:
Filled-up ground structure: leveling place → compacting Ground Treatment → high-strength geo-grid → rammer of construction foundation settlement deformation observation system → laying one deck fills out grey soil layer → laying high-strength geo-grid → select high quality filler placement in layers roadbed and every 0.3 ~ 0.6m laying high-strength geo-grid until surface layer of subgrade bed bottom surface;
Cut subgrade structure: be excavated to and change packing course bottom surface → compacting Ground Treatment → construction blind drain → high-strength geo-grid → rammer of construction foundation settlement deformation observation system → laying one deck and fill out and to lay composite geo-membrane → select high quality filler placement in layers roadbed in the middle part of grey soil layer → construction medium coarse sand bed course, bed course and every 0.3 ~ 0.6m laying high-strength geo-grid until surface layer of subgrade bed bottom surface.
Claims (4)
1. the High Speed Railway Subgrade by fault zone, comprise filled-up ground structure and cut subgrade structure, filled-up ground structure is more than natural ground, fill shot roadbed filling, cut subgrade structure is that the ground that excavates below natural ground fills shot roadbed filling, it is characterized in that: described road structure is formed by widening road bed and roadbed combination of layered structures for protection, arranges foundation settlement deformation observation system bottom roadbed;
Described widening road bed refers to widen curb, for road bed left and right curb respectively widens the width being not less than 1m on former shoulder width basis;
In described roadbed, hierarchy is included in geo-grid, the dirt confining bed that in shot filling body, layering is laid; Geo-grid place Min layers is located at and fills in bulk solid, and every interlayer is every 0.3 ~ 0.6m; Dirt confining bed is that the ground after compacting process rams the grey soil layer filled out, dirt enclosed layer thickness 0.5 ~ 1.0m.
2. a kind of High Speed Railway Subgrade by fault zone according to claim 1, it is characterized in that: the foundation settlement deformation observation system arranged bottom described roadbed, take into account inclinometer pipe by multi-point layered sedimentation jointly to form, multi-point layered settlement gauge is embedded in roadbed bottom centre and toe both sides, and inclinometer pipe is embedded in toe both sides; Multi-point displacement settlement gauge is made up of anchor head, connecting rod, sensor, conduit, and inclinometer pipe is built with acceleration transducer; Each observation element observation data is pooled in observation well by transmission cable, so that data acquisition, adopts multichannel engineering test instrument to carry out automatic measurement, by signal receiving device, carries out remote data acquisition.
3. a kind of High Speed Railway Subgrade by fault zone according to claim 1, it is characterized in that: for cut subgrade structure, described widening road bed also comprises to be widened lateral sulcus platform, widens plain stage of slope, widen lateral sulcus platform and widen plain stage of slope and widen the width being not less than 1m respectively on original lateral sulcus platform, plain stage of slope basis, lateral sulcus platform after widening, plain stage of slope width are not less than 3m, grade of side slope slows down to 1:1.75, and classification slope height is not more than 6m.
4. a kind of High Speed Railway Subgrade by fault zone according to claim 1, it is characterized in that: for cut subgrade structure, in described roadbed, hierarchy is also included on dirt confining bed and arranges composite geo-membrane, and composite geo-membrane two ends lateral sulcus is divided into and put blind drain; Composite geo-membrane lays the medium coarse sand bed course of thick 0.1m up and down respectively, and blind drain width is not less than 1m, and the soakaway trench buried depth in sewer is not higher than 0.2m below composite geo-membrane end face, and soakaway trench diameter is not less than 0.3m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510490955.4A CN105002789A (en) | 2015-08-11 | 2015-08-11 | High speed railway roadbed structure passing through fault zone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510490955.4A CN105002789A (en) | 2015-08-11 | 2015-08-11 | High speed railway roadbed structure passing through fault zone |
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| CN105002789A true CN105002789A (en) | 2015-10-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458924A (en) * | 2018-12-29 | 2019-03-12 | 山东大学 | Resistance value alertness grid deformation test system and method based on ten axle sensors |
| CN110804919A (en) * | 2019-11-19 | 2020-02-18 | 兰州交通大学 | Novel roadbed structure for crossing active fault |
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| JP5445351B2 (en) * | 2010-06-25 | 2014-03-19 | 新日鐵住金株式会社 | Filling reinforcement structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458924A (en) * | 2018-12-29 | 2019-03-12 | 山东大学 | Resistance value alertness grid deformation test system and method based on ten axle sensors |
| CN110804919A (en) * | 2019-11-19 | 2020-02-18 | 兰州交通大学 | Novel roadbed structure for crossing active fault |
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| CB03 | Change of inventor or designer information |
Inventor after: Wu Lianhai Inventor after: Bu Tongqing Inventor after: Liu Zhentian Inventor after: Jiao Ruiling Inventor after: Sun Hongwei Inventor after: Zhao Runtao Inventor after: Wang Xiaodong Inventor after: Li Bo Inventor after: Chen Zelian Inventor after: Xu Zailiang Inventor after: Zhao Jianfeng Inventor before: Wu Lianhai Inventor before: Bu Tongqing Inventor before: Jiao Ruiling Inventor before: Sun Hongwei Inventor before: Zhao Runtao Inventor before: Wang Xiaodong Inventor before: Li Bo Inventor before: Chen Zelian Inventor before: Xu Zailiang Inventor before: Zhao Jianfeng |
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Application publication date: 20151028 |
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