CN109281234A - A kind of scoria railway bed and its construction method - Google Patents
A kind of scoria railway bed and its construction method Download PDFInfo
- Publication number
- CN109281234A CN109281234A CN201811440244.6A CN201811440244A CN109281234A CN 109281234 A CN109281234 A CN 109281234A CN 201811440244 A CN201811440244 A CN 201811440244A CN 109281234 A CN109281234 A CN 109281234A
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- China
- Prior art keywords
- scoria
- embankment
- bedding
- subgrade
- bed
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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
- E01B2/00—General structure of permanent way
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of scoria railway bed and its construction methods.This kind of railway bed, including bedding, bedding embankment below (2), embankment (2) are located on ground (1);Wherein, bedding, which by scoria mixes the mixed fillers that fine granules obtain and fills, is constituted, and the embankment (2) is filled by scoria filler to be constituted, and there are also drainings filtering layer (4) between bedding and embankment (2);And slope protection construction (5) is equipped in the side slope of roadbed.The roadbed is suitable for the widely distributed area of scoria, under the premise of guaranteeing roadbed safety, scoria is utilized to greatest extent, purchase and the transportation cost of filler is greatly decreased, significantly reduce the project cost of railway bed, meanwhile also reduce and avoid dig pit generation scoria digging soil and the problem of influence environment.
Description
Technical field
The present invention relates to a kind of railway bed and its construction methods.
Background technique
Roadbed as infrastructure under line important in railway engineering, should have it is firm it is durable, the characteristics such as be unlikely to deform, with
The long-term ride comfort of track structure is kept, guarantees the operation of train safety and steady.
The graded broken stone that existing railway bed mostly uses good mechanical performance, meets code requirement, A group gravelly soil and gravel
Stone soil, B group gravelly soil and sandy soil, C chunking stone soil, gravelly soil, gravelly soil and sandy soil, four class high quality fillers fill.
It is still filling roadbed using graded broken stone or A, B, C group high quality filler in the widely distributed area of scoria for lacking high quality filler, it will
It will increase project cost, and excavation spoir cannot be efficiently used, bring environmental problem.
Summary of the invention
First invention purpose of the invention is to provide a kind of scoria railway bed, which is suitable for scoria and divides extensively
Cloth area, can be substantially reduced the cost of building of railway, and the influence to environment is small.
The present invention realizes its first invention purpose the technical scheme adopted is that a kind of scoria railway bed, including base
Bed, bedding embankment below, embankment is located on ground, it is characterized in that: the bedding is mixed by scoria and obtained with fine granules
Composite soil filler fills composition, and the embankment is filled by scoria filler and constituted, and there are also draining filters between bedding and embankment
Layer;And it is constructed in the side slope of roadbed equipped with slope protection.
Second goal of the invention of the invention is to provide a kind of construction method of above-mentioned scoria railway bed, uses this method
Construct can be substantially reduced railway build cost, be suitable for the widely distributed area of scoria.
The present invention realizes its second goal of the invention the technical scheme adopted is that a kind of scoria described in claim 1
The construction method of railway bed, the steps include:
A, the processing of ground
Rammed subgrade makes the buckling safety factor of ground not less than 1.25;
B, embankment fills
Fill forming embankment using scoria filler on ground, the clearance rate n of embankmentj≤ 32%, coefficient of subgrade reaction
K30≥90MPa/m;
C, the laying of filtering layer is drained
Sand gravel layer, non-woven geotextile and medium-sand seam, which are successively laid with, in embankment forms draining filtering layer;
D, bedding fills
The scoria mixed fillers obtained with fine granules are mixed using scoria on embankment to be filled, and bedding is formed;Base
Bed is divided into the bottom layer of subgrade of lower part and the surface layer of subgrade bed on top;Thickness=1.9m, the clearance rate n of bottom layer of subgradej≤ 30%, ground
COEFFICIENT K30≥110MPa/m;Thickness=0.6m, clearance rate nj≤28%, the ground coefficient K30 >=150MPa/m of surface layer of subgrade bed;
E, the building of slope protection construction
Bedding, draining filtering layer, embankment constitute roadbed main body, the two sides of roadbed main body are alternate, lateral embedded concrete row
Sink pours the concrete water blocking flange of arch between adjacent row sink stepwise, forms arched concrete skeleton slope protection pattern
Slope protection construction;It constructs to form scoria railway bed.
Compared with prior art, the beneficial effects of the present invention are:
One, scoria is that the magma rich in gas is sprayed by volcanic vent, is hit after being rapidly condensed into solid-state in the sky
The features such as broken gravel of lava made of the fragmentation of ground has face shaping irregular, internal more cellular porosities.Compared to general gravel
Stone type fillers, engineering mechanics property is poor, and granule strength is lower, surface is easily broken, is not easy to be compacted, porosity is big and K30 is relatively low;
It is not used as the build filler of railway bed.Embankment of the invention uses scoria filler, clearance rate nj≤ 32%, coefficient of subgrade reaction K30
≥90MPa/m;Under the premise of using scoria to greatest extent, and it can be fully achieved and require relatively low embankment
Engineering mechanics requirement.To the relatively high bedding of mechanical property, the composite soil filler with fine granules is mixed by multi-level recognition and is filled out
It builds, scoria is used as the skeleton in filler, fine grained soil enhances its compaction capacity;Under the premise of meeting bedding mechanical property,
Realize the reasonable utilization of scoria.And increase the isolation filtering layer of paving under bedding, it can effectively prevent hanging down for fine grained soil in bedding
To loss, the double-deck slope protection construction effectively prevents lateral loss of the fine grained soil under rainwater effect again, so that roadbed
Compactness is kept for a long time;And then it ensure that the long-term secured, reliable of roadbed, it is ensured that the safety of train operation.
In short, scoria is utilized under the premise of guaranteeing roadbed safety by the above measure in the present invention to greatest extent
Come the roadbed that constructs a railway.The area widely distributed suitable for volcanic slag, can gather materials on the spot, and the purchase and fortune of filler is greatly decreased
Defeated cost, hence it is evident that reduce the project cost of railway bed, meanwhile, also reduce and avoid dig pit generation scoria digging soil and
The problem of influencing environment.
Further, scoria filler used in the step B of the method for the present invention is by maximum particle diameter dmaxIt is≤100mm, uneven
Coefficient CU>=6, Los Angeles rate of wear AALL≤ 50% scoria composition;
Further, the bedding in the step D of the method for the present invention is that the bottom layer of subgrade of lower part and the surface layer of subgrade bed on top are constituted;
The scoria mixed fillers that the bottom layer of subgrade uses when filling mix 1 part of volume by the scoria of 3 parts of volumes
Fine granules composition;And its maximum particle diameter dmax≤ 75mm, nonuniformity coefficient CU>=10, Los Angeles rate of wear AALL≤ 50%;
The scoria mixed fillers that the surface layer of subgrade bed uses when filling mix 1 part of volume by the scoria of 2 parts of volumes
Fine granules composition;And its maximum particle diameter dmax≤ 60mm, nonuniformity coefficient CU>=15,1≤coefficient of curvature CC≤ 3, Los Angeles is worn away
Rate AALL≤ 50%;
The fine granules are the fine grained soil of gravelly sand, coarse sand, middle sand or liquid limit less than 40%.
Both composite soil fillers of multi-level recognition, and hierarchical control filler norm controlling, can either utilize to greatest extent
Volcanic slag, and can guarantee that the mechanical property of the bedding of build is met the requirements.
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is the cross-sectional configuration schematic diagram of scoria railway bed of the invention.
Fig. 2 is the enlarged drawing of the local A of Fig. 1.
Fig. 3 is the side B of Fig. 1 to enlarged structure schematic diagram.
Specific embodiment
Embodiment
Fig. 1-3 is shown, and a kind of specific embodiment of the invention is a kind of scoria railway bed, including bedding, bedding
Embankment 2 below, embankment 2 is located on ground 1, it is characterized in that: the bedding is mixed the mixing that fine granules obtain by scoria
Filler fills composition, and the embankment 2 is filled by scoria filler to be constituted, and there are also draining filtering layers 4 between bedding and embankment 2;
And slope protection construction 5 is equipped in the side slope of roadbed.
The construction method of the scoria railway bed of this example, the steps include:
A, the processing of ground
Rammed subgrade 1 makes the buckling safety factor of ground 1 not less than 1.25;
B, embankment fills
Fill forming embankment 2, the clearance rate n of embankment 2 using scoria filler on ground 1j≤ 32%, base system
Number K30≥90MPa/m;
C, the laying of filtering layer is drained
Sand gravel layer 4a, non-woven geotextile 4b are successively laid in embankment 2 and medium-sand seam 4c forms draining filtering layer 4;
D, bedding fills
The scoria mixed fillers obtained with fine granules are mixed using scoria on embankment 2 to be filled, and bedding is formed;Base
Bed is divided into the bottom layer of subgrade 3a of lower part and the surface layer of subgrade bed 3b on top;Thickness=1.9m, the clearance rate n of bottom layer of subgrade 3aj≤
30%, coefficient of subgrade reaction K30≥110MPa/m;Thickness=0.6m, the clearance rate n of surface layer of subgrade bed 3bj≤ 28%, coefficient of subgrade reaction K30≥
150MPa/m;
E, the building of slope protection construction
Bedding, draining filtering layer 4, embankment 2 constitute roadbed main body, the two sides of roadbed main body are alternate, lateral embedded concrete
The concrete water blocking flange 5a of arch is poured between rhone 5b, adjacent row sink 5b stepwise, forms arched concrete skeleton shield
The slope protection construction 5 of shelving formula;It constructs to form scoria railway bed.
Scoria filler used in above-mentioned steps B, by maximum particle diameter dmax≤ 100mm, nonuniformity coefficient CU>=6, Lip river China fir
Rock rate of wear AALL≤ 50% scoria composition;
Bedding in above-mentioned steps D is the bottom layer of subgrade 3a of lower part and the surface layer of subgrade bed 3b on top is constituted;
The scoria mixed fillers that the bottom layer of subgrade 3a is used when filling mix 1 part of body by the scoria of 3 parts of volumes
Long-pending fine granules composition;And its maximum particle diameter dmax≤ 75mm, nonuniformity coefficient CU>=10, Los Angeles rate of wear AALL≤ 50%;
The scoria mixed fillers that the surface layer of subgrade bed 3b is used when filling mix 1 part of volume by the scoria of 2 parts of volumes
Fine granules composition;And its maximum particle diameter dmax≤ 60mm, nonuniformity coefficient CU>=15,1≤coefficient of curvature CC≤ 3, Los Angeles is ground
Consumption rate AALL≤ 50%;
The fine granules are the fine grained soil of gravelly sand, coarse sand, middle sand or liquid limit less than 40%.
Claims (4)
1. a kind of scoria railway bed, including bedding, bedding embankment below (2), embankment (2) are located on ground (1), special
Sign is: the bedding, which by scoria mixes the mixed fillers that fine granules obtain and fills, to be constituted, and the embankment (2) is by scoria
Filler fills composition, and there are also drainings filtering layer (4) between bedding and embankment (2);And slope protection structure is equipped in the side slope of roadbed
Make (5).
2. a kind of construction method of scoria railway bed described in claim 1, the steps include:
A, the processing of ground
Rammed subgrade (1) makes the buckling safety factor of ground (1) not less than 1.25;
B, embankment fills
Fill being formed embankment (2) using scoria filler on ground (1), the clearance rate n of embankment (2)j≤ 32%, ground
COEFFICIENT K30≥90MPa/m;
C, the laying of filtering layer is drained
Sand gravel layer (4a), non-woven geotextile (4b) and medium-sand seam (4c), which are successively laid with, in embankment (2) forms draining filtering layer
(4);
D, bedding fills
The scoria mixed fillers obtained with fine granules are mixed using scoria on embankment (2) to be filled, and bedding is formed;Bedding
It is divided into the bottom layer of subgrade (3a) of lower part and the surface layer of subgrade bed (3b) on top;Thickness=1.9m, the clearance rate n of bottom layer of subgrade (3a)j
≤ 30%, coefficient of subgrade reaction K30≥110MPa/m;Thickness=0.6m, the clearance rate n of surface layer of subgrade bed (3b)j≤ 28%, coefficient of subgrade reaction
K30≥150MPa/m;
E, the building of slope protection construction
Bedding, draining filtering layer (4), embankment (2) constitute roadbed main body, the two sides of roadbed main body are alternate, lateral embedded concrete
Rhone (5b) pours the concrete water blocking flange (5a) of arch between adjacent row sink (5b) stepwise, forms arched concrete
The slope protection of skeleton slope protection pattern constructs (5);It constructs to form scoria railway bed.
3. the construction method of scoria railway bed as claimed in claim 2, it is characterized in that:
Scoria filler used in the step B, by maximum particle diameter dmax≤ 100mm, nonuniformity coefficient CU>=6, Los Angeles is ground
Consumption rate AALL≤ 50% scoria composition;
4. the construction method of scoria railway bed as claimed in claim 2, it is characterized in that:
Bedding in the step D is that the bottom layer of subgrade (3a) of lower part and the surface layer of subgrade bed (3b) on top are constituted;
The scoria mixed fillers that the bottom layer of subgrade (3a) uses when filling mix 1 part of volume by the scoria of 3 parts of volumes
Fine granules composition;And its maximum particle diameter dmax≤ 75mm, nonuniformity coefficient CU>=10, Los Angeles rate of wear AALL≤ 50%;
The scoria mixed fillers that the surface layer of subgrade bed (3b) uses when filling mix 1 part of volume by the scoria of 2 parts of volumes
Fine granules composition;And its maximum particle diameter dmax≤ 60mm, nonuniformity coefficient CU>=15,1≤coefficient of curvature CC≤ 3, Los Angeles is worn away
Rate AALL≤ 50%;
The fine granules are the fine grained soil of gravelly sand, coarse sand, middle sand or liquid limit less than 40%.
Priority Applications (1)
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CN201811440244.6A CN109281234A (en) | 2018-11-29 | 2018-11-29 | A kind of scoria railway bed and its construction method |
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CN201811440244.6A CN109281234A (en) | 2018-11-29 | 2018-11-29 | A kind of scoria railway bed and its construction method |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113322720A (en) * | 2021-05-18 | 2021-08-31 | 中铁二院工程集团有限责任公司 | Roadbed structure suitable for heavy haul railway in south Asia region |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02308002A (en) * | 1989-05-23 | 1990-12-21 | Ootsubo Sekizai Kk | Roadbed material |
JPH0688301A (en) * | 1992-09-10 | 1994-03-29 | East Japan Railway Co | Lightweight banking mixture for track, lightweight embankment for track, and construction method therefor |
CN101153475A (en) * | 2007-09-30 | 2008-04-02 | 中铁二院工程集团有限责任公司 | Redbeds mudstone filled high-speed railway subgrade and construction method thereof |
CN201095717Y (en) * | 2007-09-30 | 2008-08-06 | 中铁二院工程集团有限责任公司 | Red beds filled high-speed railway roadbed |
CN101974877A (en) * | 2010-10-18 | 2011-02-16 | 中铁第四勘察设计院集团有限公司 | Rapid transit railway soft rock-improved soil roadbed structure |
CN202380372U (en) * | 2011-12-26 | 2012-08-15 | 中铁第四勘察设计院集团有限公司 | Protecting structure for weathered granite bank slope of existing railway |
CN206385412U (en) * | 2016-11-24 | 2017-08-08 | 中交第一公路工程局有限公司 | The MULTIPLE COMPOSITE roadbed filled using volcanic ash |
-
2018
- 2018-11-29 CN CN201811440244.6A patent/CN109281234A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02308002A (en) * | 1989-05-23 | 1990-12-21 | Ootsubo Sekizai Kk | Roadbed material |
JPH0688301A (en) * | 1992-09-10 | 1994-03-29 | East Japan Railway Co | Lightweight banking mixture for track, lightweight embankment for track, and construction method therefor |
CN101153475A (en) * | 2007-09-30 | 2008-04-02 | 中铁二院工程集团有限责任公司 | Redbeds mudstone filled high-speed railway subgrade and construction method thereof |
CN201095717Y (en) * | 2007-09-30 | 2008-08-06 | 中铁二院工程集团有限责任公司 | Red beds filled high-speed railway roadbed |
CN101974877A (en) * | 2010-10-18 | 2011-02-16 | 中铁第四勘察设计院集团有限公司 | Rapid transit railway soft rock-improved soil roadbed structure |
CN202380372U (en) * | 2011-12-26 | 2012-08-15 | 中铁第四勘察设计院集团有限公司 | Protecting structure for weathered granite bank slope of existing railway |
CN206385412U (en) * | 2016-11-24 | 2017-08-08 | 中交第一公路工程局有限公司 | The MULTIPLE COMPOSITE roadbed filled using volcanic ash |
Non-Patent Citations (4)
Title |
---|
吉林省质量技术监督局: "《DB22/T2092-2014公路工程火山灰材料应用技术指南》", 30 June 2014 * |
梁多伟等: "火山渣掺配土质砾砂改良填料剪切特性试验研究", 《武汉理工大学学报》 * |
王春荣等: "浅谈高速铁路路基填料改良试验研究及应用", 《水利水电施工》 * |
胡江洋等: "火山渣作为路基填料的试验研究", 《深圳大学学报(理工版)》 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113322720A (en) * | 2021-05-18 | 2021-08-31 | 中铁二院工程集团有限责任公司 | Roadbed structure suitable for heavy haul railway in south Asia region |
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