CN105803875A - Construction method for preparing foam-light-soil-poured high-speed rail subgrade - Google Patents
Construction method for preparing foam-light-soil-poured high-speed rail subgrade Download PDFInfo
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- CN105803875A CN105803875A CN201610147731.8A CN201610147731A CN105803875A CN 105803875 A CN105803875 A CN 105803875A CN 201610147731 A CN201610147731 A CN 201610147731A CN 105803875 A CN105803875 A CN 105803875A
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- Prior art keywords
- subgrade
- lightweight soil
- foam lightweight
- soil
- bottom layer
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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
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/005—Making of concrete parts of the track in situ
-
- 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
-
- 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
- E01B2204/08—Deep or vertical foundation
Abstract
The invention discloses a construction method for preparing a foam-light-soil-poured high-speed rail subgrade. The construction method comprises the steps that the high-speed rail subgrade is divided into a subgrade bed surface layer and a subgrade bed bottom layer; subgrade groove excavation construction is performed according to the height of the high-speed rail subgrade; mixed raw materials of foam light soil of the subgrade bed bottom layer are proportioned; molding is performed in a mold of the subgrade bed bottom layer; demolding curing and drying are performed on the foam light soil formed in the subgrade bed bottom layer; mixed raw materials of foam light soil of the subgrade bed surface layer are proportioned; molding is performed in a mold of the subgrade bed surface layer; demolding curing and drying are performed on the foam light soil formed in the subgrade bed surface layer. The foam-light-soil high-speed rail subgrade is high in strength, stable in performance and not prone to sedimentation and deformation, it can be guaranteed that a high-speed train runs steadily and safely, and the maintenance cost during operation in the future is reduced.
Description
Technical field
The present invention relates to railway construction technical field, be specifically related to a kind of prepare the method that Foam lightweight soil builds high ferro subgrade construction.
Background technology
Foam lightweight material is to need to be referred to by air in foam oleo stock according to application by method chemically or physically, through reasonable maintenance molding, and formed containing tiny in a large number sealed porosity, and there is the cement-based gelling material of suitable intensity, its production method is typically with mechanical means and foam aqueous solution is prepared into foam, again foam is joined in the slip formed containing siliceous material, calcareous material, water and various additives etc., blended stirring, moulding by casting, maintenance a kind of porous material.
High-quality Foam lightweight soil has good durability (including fatigue-resistance characteristics, freeze-thaw cycle characteristic, drying and watering cycle characteristic), can be used for substituting backfill soil, often it is widely used in the roadbed stemming operations such as soft base Abutment Back fills, expressway extension, precipitous section, mountain area are filled, there is the technology economy advantage of uniqueness.Rail track is made up of base structure thing and the track structure of different characteristics, and these form structural interaction, mutual dependence for existence, collectively form a combination foundation circuit.Base structure thing is divided into again cast-in-place structural basis and fills architecture basics, cast-in-place structural basis is railway span river, the bridge that intermountain etc. must be provided with, the structures such as tunnel, fill architecture basics to be generally and fill graded broken stone or graded sand gravel mixes a certain amount of cement, fill the railway bed of the design forms such as AB material, the different base structure thing of both is in intensity, rigidity, deformation, the aspects such as material have very big difference, easily cause differential settlement, the diseases such as deformation, cause producing to impact to track structure when train passes through basis intersection, train is made again to produce big vibration in turn, cause train operation worsening condition, vehicle, track structure service life reduction, affect the steady and security problems that bullet train runs.It is thus desirable to consider a kind of high ferro roadbed construction method, there is provided a kind of compound intensity roadbed embankment material making basis high, stable performance to substitute based on this subgrade construction scheme or Part Substitution (arranging basement transition stage) fills structure roadbed, guarantee the current safety of bullet train, and reduce the maintenance cost during operation in the future.
Summary of the invention
For the deficiency of Foam lightweight soil construction in existing high ferro, the invention provides and a kind of prepare the method that Foam lightweight soil builds high ferro subgrade construction, by preparing the high ferro roadbed of composite bed, meet the requirement of existing high ferro roadbed.
The invention provides and a kind of prepare the method that Foam lightweight soil builds high ferro subgrade construction, comprise the steps:
High ferro roadbed is divided into surface layer of subgrade bed and bottom layer of subgrade, pre-sets the light-weight foamed soil layer in surface layer of subgrade bed and bottom layer of subgrade and build height；
Carry out foundation trench excavation construction according to high ferro roadbed height, and the base of the high ferro roadbed to build is cleared up, ensure that base is without rubbish and hydrops；
The mixed material in Foam lightweight soil in configuration bottom layer of subgrade, forms uniformly modified slip by Pulp preparation, adds foaming agent mixed foaming and formed in modified slip；
When foaming in bottom layer of subgrade, the Foam lightweight soil wet density formed reaches 560kg/m3To 580kg/m3, and when bubble rate reaches 69.5%, in the die for molding of bottom layer of subgrade；
The Foam lightweight soil that bottom layer of subgrade is formed carries out demoulding maintenance, dry；
When the subgrade strength detecting that bottom layer of subgrade is formed reaches more than 1MPa, the mixed material in Foam lightweight soil in configuration surface layer of subgrade bed, form uniformly modified slip by Pulp preparation, in modified slip, add foaming agent mixed foaming formed；
When foaming in surface layer of subgrade bed, the Foam lightweight soil wet density formed reaches 580kg/m3To 620kg/m3, and when bubble rate reaches 66.5%, in the die for molding of surface layer of subgrade bed；
The Foam lightweight soil that surface layer of subgrade bed is formed carries out demoulding maintenance, dry, and the subgrade strength forming lower roadbed reaches more than 1.2MPa.
In described surface layer of subgrade bed, the Foam lightweight soil of every cubic metre is formed with foaming agent mixed foaming by 344kg cement and 224kg water.
In described bottom layer of subgrade, the Foam lightweight soil of every cubic metre is formed with foaming agent mixed foaming by 310kg cement and 202kg water.
It is highly between 0.1m to 1.0m that light-weight foamed soil layer in described surface layer of subgrade bed is built, between the downward 0m to 1m in roadbed top；Described bottom layer of subgrade is at downward more than the 1.0m in roadbed top.
Described cement is composite Portland cement.
Described Foam lightweight soil flow valuve is 160mm to 180mm.
The Acidity of Aikalinity of described water is neutral.
The method adopting compound construction in the present invention, it is possible to achieve the downward 0～1.0m in roadbed top, subgrade strength can reach more than 1.2MPa；Downward more than the 1.0m in roadbed top, subgrade strength can reach more than 1.0MPa.The Foam lightweight soil high ferro subgrade strength constructed by the present invention is high, stable performance, not free settling, deformation, it is possible to ensure that bullet train runs steadily and safety, and reduce the maintenance cost during operation in the future.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the method flow diagram that the preparation Foam lightweight soil in the embodiment of the present invention builds high ferro subgrade construction.
Fig. 2 is the cross-sectional structure schematic diagram of the high ferro roadbed in the embodiment of the present invention；
Fig. 3 is the three-dimensional cross section structure schematic diagram of the high ferro roadbed in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Fig. 1 illustrates that the preparation Foam lightweight soil in the embodiment of the present invention builds the method flow diagram of high ferro subgrade construction, comprises the steps:
S101, high ferro roadbed is divided into surface layer of subgrade bed and bottom layer of subgrade, pre-sets the light-weight foamed soil layer in surface layer of subgrade bed and bottom layer of subgrade and build height；
In specific implementation process, being divided into upper and lower two-layer to carry out placement layer by layer on whole high ferro roadbed, thus ensureing the subgrade strength of different layers, building angle by ensureing in advance, convenient modeling and foundation trench excavation etc..
S102, carry out foundation trench excavation construction according to high ferro roadbed height, and the base of the high ferro roadbed to build is cleared up, ensure that base is without rubbish and hydrops；
The mixed material in Foam lightweight soil in S103, configuration bottom layer of subgrade, forms uniformly modified slip by Pulp preparation, adds foaming agent mixed foaming and formed in modified slip；
In specific implementation process, the first Foam lightweight soil in configuration bottom layer of subgrade, bottom layer of subgrade belongs to the bottom of high ferro roadbed, it is possible to first lay in the process laid, and carries out foaming by foaming agent and mixed material and is formed.
S104, when bottom layer of subgrade foams formed Foam lightweight soil wet density reach 560kg/m3To 580kg/m3, and when bubble rate reaches 69.5%, in the die for molding of bottom layer of subgrade；
In specific implementation process, set up the mould of bottom layer of subgrade, then whole Foam lightweight soil is carried out wet density and bubble rate detection, when reaching corresponding moisturt register and bubble rate, again through the mould molding of bottom layer of subgrade.In this bottom layer of subgrade, the Foam lightweight soil of every cubic metre is formed with foaming agent mixed foaming by 310kg cement and 202kg water.
S105, the Foam lightweight soil that bottom layer of subgrade is formed carry out demoulding maintenance, dry；
In specific implementation process, it is possible to adopt some modes to carry out demoulding maintenance, in order to make whole base course rapid shaping, it is also possible to suitably adopt drying device to be acted upon, it is ensured that the rapidity of whole time.
S106, when the subgrade strength detecting that bottom layer of subgrade is formed reaches more than 1MPa, the mixed material in Foam lightweight soil in configuration surface layer of subgrade bed, form uniformly modified slip by Pulp preparation, in modified slip, add foaming agent mixed foaming formed；
In demoulding maintenance, in dry process, the subgrade strength of the whole bottom layer of subgrade of periodic detection, when the subgrade strength of bottom layer of subgrade reaches more than 1MPa, Foam lightweight soil in configuration surface layer of subgrade bed, bottom layer of subgrade belongs to the bottom of high ferro roadbed, it is possible to first lay in the process laid, and carries out foaming by foaming agent and mixed material and is formed.
S107, when surface layer of subgrade bed foams formed Foam lightweight soil wet density reach 580kg/m3To 620kg/m3, and when bubble rate reaches 66.5%, in the die for molding of surface layer of subgrade bed；
In specific implementation process, set up the mould of surface layer of subgrade bed, then whole Foam lightweight soil is carried out wet density and bubble rate detection, when reaching corresponding wet density and bubble rate, again through the mould molding of surface layer of subgrade bed.In this surface layer of subgrade bed, the Foam lightweight soil of every cubic metre is formed with foaming agent mixed foaming by 344kg cement and 224kg water.
S108, the Foam lightweight soil that surface layer of subgrade bed is formed carry out demoulding maintenance, dry, and the subgrade strength forming lower roadbed reaches more than 1.2MPa.
In demoulding maintenance, dry process, the subgrade strength of the whole bottom layer of subgrade of periodic detection, the subgrade strength at bottom layer of subgrade reaches more than 1.2MPa.
It should be noted that in specific implementation process, the light-weight foamed soil layer in surface layer of subgrade bed is built highly between 0.1m to 1.0m, and such as 0.1m, 0.5m, 0.8m, 1m etc., the light-weight foamed soil layer in this surface layer of subgrade bed is between the downward 0m to 1m in roadbed top.This bottom layer of subgrade is at downward more than the 1.0m in roadbed top.Cement in the embodiment of the present invention is composite Portland cement, and the Foam lightweight soil flow valuve scope in whole construction is between 160mm to 180mm, it is possible to be the situation such as flow valuve 160mm, 170mm, 180mm.In whole Foam lightweight soil foaming process, the Acidity of Aikalinity of water is neutral.
To sum up, the method adopting compound construction in the present invention, it is possible to achieve the downward 0～1.0m in roadbed top, subgrade strength can reach more than 1.2MPa；Downward more than the 1.0m in roadbed top, subgrade strength can reach more than 1.0MPa.The Foam lightweight soil high ferro subgrade strength constructed by the present invention is high, stable performance, not free settling, deformation, it is possible to ensure that bullet train runs steadily and safety, and reduce the maintenance cost during operation in the future.
The preparation the Foam lightweight soil above embodiment of the present invention provided is built the method for high ferro subgrade construction and is described in detail, principles of the invention and embodiment are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention；Simultaneously for one of ordinary skill in the art, according to the thought of the present invention, all will change in specific embodiments and applications, in sum, this specification content should not be construed as limitation of the present invention.
Claims (7)
1. prepare the method that Foam lightweight soil builds high ferro subgrade construction for one kind, it is characterised in that comprise the steps:
High ferro roadbed is divided into surface layer of subgrade bed and bottom layer of subgrade, pre-sets the light-weight foamed soil layer in surface layer of subgrade bed and bottom layer of subgrade and build height；
Carry out foundation trench excavation construction according to high ferro roadbed height, and the base of the high ferro roadbed to build is cleared up, ensure that base is without rubbish and hydrops；
The mixed material in Foam lightweight soil in configuration bottom layer of subgrade, forms uniformly modified slip by Pulp preparation, adds foaming agent mixed foaming and formed in modified slip；
When foaming in bottom layer of subgrade, the Foam lightweight soil wet density formed reaches 560kg/m3To 580kg/m3, and when bubble rate reaches 69.5%, in the die for molding of bottom layer of subgrade；
The Foam lightweight soil that bottom layer of subgrade is formed carries out demoulding maintenance, dry；
When the subgrade strength detecting that bottom layer of subgrade is formed reaches more than 1MPa, the mixed material in Foam lightweight soil in configuration surface layer of subgrade bed, form uniformly modified slip by Pulp preparation, in modified slip, add foaming agent mixed foaming formed；
When foaming in surface layer of subgrade bed, the Foam lightweight soil wet density formed reaches 580kg/m3To 620kg/m3, and when bubble rate reaches 66.5%, in the die for molding of surface layer of subgrade bed；
The Foam lightweight soil that surface layer of subgrade bed is formed carries out demoulding maintenance, dry, and the subgrade strength forming lower roadbed reaches more than 1.2MPa.
2. the method that preparation Foam lightweight soil as claimed in claim 1 builds high ferro subgrade construction, it is characterised in that in described surface layer of subgrade bed, the Foam lightweight soil of every cubic metre is formed with foaming agent mixed foaming by 344kg cement and 224kg water.
3. the method that preparation Foam lightweight soil as claimed in claim 1 builds high ferro subgrade construction, it is characterised in that in described bottom layer of subgrade, the Foam lightweight soil of every cubic metre is formed with foaming agent mixed foaming by 310kg cement and 202kg water.
4. the method that preparation Foam lightweight soil as claimed in claim 1 builds high ferro subgrade construction, it is characterised in that it is highly between 0.1m to 1.0m that the light-weight foamed soil layer in described surface layer of subgrade bed is built, between the downward 0m to 1m in roadbed top；Described bottom layer of subgrade is at downward more than the 1.0m in roadbed top.
5. the method that preparation Foam lightweight soil as claimed in claim 1 builds high ferro subgrade construction, it is characterised in that described cement is composite Portland cement.
6. the method that the preparation Foam lightweight soil as described in any one of claim 1 to 5 builds high ferro subgrade construction, it is characterised in that described Foam lightweight soil flow valuve is 160mm to 180mm.
7. the method that the preparation Foam lightweight soil as described in any one of claim 1 to 5 builds high ferro subgrade construction, it is characterised in that the Acidity of Aikalinity of described water is neutral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610147731.8A CN105803875A (en) | 2016-03-15 | 2016-03-15 | Construction method for preparing foam-light-soil-poured high-speed rail subgrade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610147731.8A CN105803875A (en) | 2016-03-15 | 2016-03-15 | Construction method for preparing foam-light-soil-poured high-speed rail subgrade |
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| CN105803875A true CN105803875A (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610147731.8A Pending CN105803875A (en) | 2016-03-15 | 2016-03-15 | Construction method for preparing foam-light-soil-poured high-speed rail subgrade |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108179667A (en) * | 2017-11-30 | 2018-06-19 | 中铁四局集团有限公司 | The construction monitoring method of high-speed railway Foam lightweight soil roadbed |
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| CN105155383A (en) * | 2015-07-31 | 2015-12-16 | 中交二公局第三工程有限公司 | Construction process of bubble light soil |
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2016
- 2016-03-15 CN CN201610147731.8A patent/CN105803875A/en active Pending
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| JP5496755B2 (en) * | 2010-04-15 | 2014-05-21 | 電気化学工業株式会社 | Concrete ballast method for ballast roadbed |
| CN103467038A (en) * | 2013-08-30 | 2013-12-25 | 浙江省建工集团有限责任公司 | Foam lightweight soil high-speed rail roadbed |
| CN104131502A (en) * | 2014-07-07 | 2014-11-05 | 广东盛瑞土建科技发展有限公司 | Construction method for widening road in rapid erection manner |
| CN104746390A (en) * | 2015-03-13 | 2015-07-01 | 西南交通大学 | Foam lightweight concrete railroad bed structure |
| CN105155383A (en) * | 2015-07-31 | 2015-12-16 | 中交二公局第三工程有限公司 | Construction process of bubble light soil |
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| CN108179667A (en) * | 2017-11-30 | 2018-06-19 | 中铁四局集团有限公司 | The construction monitoring method of high-speed railway Foam lightweight soil roadbed |
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Effective date of registration: 20180918 Address after: 511447 Unit D5, Fifth Floor, Innovation Park, Chuangqi Road, Guanqiao Village, Shilou Town, Panyu District, Guangzhou City, Guangdong Province Applicant after: GUANGDONG SHENGRUI TECHNOLOGY CO., LTD. Applicant after: Sichuan Chuang Chuang Technology Co., Ltd. Address before: 510000 5D unit 1, Qinghua science park, Guan Qiao village, Shi Lou Town, Panyu District, Guangzhou, Guangdong Applicant before: GUANGDONG SHENGRUI TECHNOLOGY CO., LTD. |
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Application publication date: 20160727 |