CN207567570U - A kind of Foam lightweight soil railway bed transition section structure - Google Patents
A kind of Foam lightweight soil railway bed transition section structure Download PDFInfo
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- CN207567570U CN207567570U CN201720794088.8U CN201720794088U CN207567570U CN 207567570 U CN207567570 U CN 207567570U CN 201720794088 U CN201720794088 U CN 201720794088U CN 207567570 U CN207567570 U CN 207567570U
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Abstract
The utility model is related to a kind of Foam lightweight soil railway bed transition section structures.Frame is built by laying bricks or stones with autoclave aerated concrete building block in the road structure of the utility model, and pours Foam lightweight soil in the frame；Its middle frame uses 400 500kg/m of density3Autoclave aerated concrete building block is built by laying bricks or stones, and light soil roadbed uses wet density as 550 600kg/m to roadbed at the middle and upper levels3Foam lightweight soil pour, lower floor's light soil roadbed use 500 550kg/m of wet density3Light soil pours, road structure in the utility model is more shorter than conventional roadbed filling construction period, save it is simple pour light soil advantage while, roadbed than being poured using light soil merely has higher bearing strength, each material performance of itself can be given full play in this way, and maintains good performance, can reduce subgrade defect, the maintenance cost during operation is saved, is highly suitable for railway bed.
Description
Technical field
The utility model belongs to railway subgrade works field, and in particular to a kind of Foam lightweight soil railway bed changeover portion knot
Structure.
Background technology
Due to the development of high-speed railway, the railways such as bridge, culvert structure is gradual in the proportion that railway construction field occurs
Increase, these works (bridge, culvert when) behind using conventional backfilling material backfill when, except the consolidation of backfilling material itself is sunk
Drop is outer, and excessive sedimentation and deformation can also be generated to subsoil soil by bearing excessive additional load in addition to dead weight for a long time；And platform
All it is the backfill construction for carrying out the platform back of the body again after the completion of the construction of bridges and culverts structure when the back of the body is backfilled according to general construction method, it is this
Construction method bankets and high, construction faciostenosis and can not use the difficulties such as big machinery, for these difficulties, although taking one
A little measures, such as add cement in graded broken stone, carry out rolling compacting using mini-plant, but still can not control very well
The sedimentation after section work is crossed, the excessive settlement after construction occurred in the section transitions section of high-speed railway at present is brought to high ferro maintenance
Detrimental effect.
In view of problem existing for above-mentioned existing changeover portion, the utility model people passes through by continuous research, design
After studying sample repeatedly and improving, the utility model having practical value is created finally.
Invention content
The purpose of this utility model is that overcoming existing changeover portion, there are differential settlement, platforms under the action of vehicle load
The compactness of back of the body backfilling material such as does not reach requirement at the problems, and provides a kind of Foam lightweight soil railway bed transition section structure, institute
Technical problems to be solved are to mitigate the weight of backfilling materials behind abutments, compacting leakiness etc., so as to more practical.
The another object of the utility model is, accelerates speed of application, reduces the maintenance cost during railway operation, from
It is and more practical.
The purpose of this utility model and its technical problem is solved using following technical scheme to realize.According to this practicality
A kind of Foam lightweight soil railway bed transition section structure of novel proposition, including：It is abutment or bridges and culverts, ground, steam pressurized mixed
Solidifying earth building blocks, light soil and geotechnical grid add layer of sand to form, wherein making is built by steam-pressing aero-concrete above the ground
The various forms of frames of block composition, pour light soil in frame, form autoclave aerated concrete building block lightweight soil layer, described
Autoclave aerated concrete building block lightweight soil layer from bottom to top can making multilayer, it is light positioned at top layer's autoclave aerated concrete building block
Matter soil layer top is that geotechnical grid adds layer of sand, wherein, the geotechnical grid adds layer of sand to each layer autoclave aerated concrete building block
Lightweight soil layer is that width successively reduces from bottom to top.
A kind of aforementioned Foam lightweight soil railway bed transition section structure pours the light soil as bubble in frame
Foam light soil.
A kind of aforementioned Foam lightweight soil railway bed transition section structure, further includes metal mesh, and the metal mesh is set
It puts between multilayer autoclave aerated concrete building block lightweight soil layer.
A kind of aforementioned Foam lightweight soil railway bed transition section structure, further includes bed course, and the bed course making exists
On ground and under bottom autoclave aerated concrete building block lightweight soil layer.
A kind of aforementioned Foam lightweight soil railway bed transition section structure, further includes anti-seepage geotextile or antiseepage mortar,
The anti-seepage geotextile or antiseepage mortar is arranged between the ground and the bed course and is arranged in most upper
Layer autoclave aerated concrete building block lightweight soil layer and geotechnical grid add between layer of sand.
A kind of aforementioned Foam lightweight soil railway bed transition section structure, further includes filler, in the multilayer steam pressure
Conventional fillers are filled, and tamp compression on the outside of air-entrained concrete building block lightweight soil layer.
Aforementioned a kind of Foam lightweight soil railway bed transition section structure, wherein the autoclave aerated concrete building block group
Into frame form include well shape, bar shaped, triangle.
Aforementioned a kind of Foam lightweight soil railway bed transition section structure, wherein the autoclave aerated concrete building block group
Into the longitudinal direction of frame be located at the underfaces of track plates.
Aforementioned a kind of Foam lightweight soil railway bed transition section structure, wherein the Foam lightweight soil, upper strata lightweight
Native density is 550-600kg/m3, other layers are 500-550kg/m3, the density of the autoclave aerated concrete building block is 400-
500kg/m3。
The utility model has clear advantage and advantageous effect compared with prior art.It at least has following advantages：
1st, the utility model resistance to compression bearing strength in the case of equal densities is big；It is this is because identical in the construction process
The compressive strength rate of the autoclave aerated concrete building block of density is big with the compression strength of density foam light soil, such as dry density
500kg/m3The compression strength of high-class product of autoclave aerated concrete building block be greater than equal to 3.5Mpa, and dry density is
500kg/m3The intensity of light soil is 2.8Mpa；In light soil roadbed of the autoclave aerated concrete building block for frame, steam pressure adds
The frame of gas concrete segment composition constitutes main force structure, therefore its bearing strength compared with pure light soil roadbed
It is improved.
2nd, the utility model can be prefabricated using autoclave aerated concrete building block, therefore the quality of building block is ensured；
It can directly be built by laying bricks or stones during field application, and it can replace template, therefore template assembly and disassembly not needed in work progress, can built
Building a part of frame can start to pour later, form cross construction in a small range, accelerate speed of application；
3rd, the autoclave aerated concrete building block that the utility model uses is the roadbed of frame with all being carried out using light soil
The roadbed poured reduces cost and is mainly reflected in steam pressurized mix compared to not only increasing bearing strength and also reducing cost
Solidifying earth building blocks price is low；In addition subgrade rating is improved, therefore in practical applications can be to pouring lightweight in the present invention
The density of soil carries out appropriate reduction, these factors all effectively reduce construction cost.
4th, the utility model inherits the advantages of Foam lightweight soil pours roadbed, does not need to large scale equipment, and when construction is not required to
It vibrates, is not required to roll, it is difficult the problem of carrying out rolling compacting to overcome changeover portion close to the conventional fillers of Abutment.
5th, the utility model reduces maintenance cost of the railway during operation, this is because steam-pressing aero-concrete is built
Block, which pours light soil roadbed, can effectively reduce disease during railway operation, so as to which maintenance cost is reduced.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and being implemented in accordance with the contents of the specification, and in order to allow the above and other purpose, feature of the utility model
It can be clearer and more comprehensible with advantage, special below to lift preferred embodiment, and coordinate attached drawing, detailed description are as follows.
Description of the drawings
Fig. 1 is the composite structure schematic longitudinal section of the utility model.
Fig. 2 is the composite structure schematic top plan view of the utility model.
Fig. 3 is the composite structure schematic cross-sectional view of the utility model
Wherein：
1：Ground 2：Blotter
3：Light soil 4：Metal mesh
5：Geotechnical grid adds layer of sand 6：Autoclave aerated concrete building block
7：Abutment 8：Filler
9-1：First anti-seepage geotextile or antiseepage mortar
9-2：Second anti-seepage geotextile or antiseepage mortar
Specific embodiment
Further to illustrate that the utility model is to reach the technological means and effect that predetermined goal of the invention taken, below
With reference to attached drawing and preferred embodiment, to according to the utility model proposes a kind of Foam lightweight soil railway bed transition section structure,
Its specific embodiment, structure, method, step, feature and its effect are described in detail as after.
A kind of Foam lightweight soil railway bed transition section structure of the proposition of the utility model, is by steam-pressing aero-concrete
Concrete block masonry pours light soil composition in the frame into frame structure, and frame uses density as 400-500kg/m3Steam pressure
Air-entrained concrete building block 6, the density of light soil 3 poured uses different density according to the difference of casting position, on upper strata
Wet density 550-600kg/m is used in roadbed3Light soil 3, lower floor's roadbed uses wet density as 500-550kg/m3Light soil
3。
Embodiment 1
A kind of Foam lightweight soil railway bed transition section structure of the utility model first embodiment, as shown in Figure 1-Figure 3,
Frame is formed by autoclave aerated concrete building block 6.It is formed in frame in the autoclave aerated concrete building block 6 and pours light soil
3 form autoclave aerated concrete building block lightweight soil layer, and entire roadbed includes abutment 7, ground 1, blotter 2, light soil 3, gold
Belong to net 4, geotechnical grid adds layer of sand 5, autoclave aerated concrete building block 6, filler 8, anti-seepage geotextile or antiseepage mortar.Refering to Fig. 1
It is shown, one layer of first infiltration geotextiles or antiseepage mortar 9-1 are laid on ground 1, in first anti-seepage geotextile or antiseepage sand
Blotter 2 has been equipped on slurry 9-1, has been equipped with what is be made of autoclave aerated concrete building block 6 on the blotter 2
Various forms of frames, the frame of the present embodiment is well shape.Light soil 3 is poured in the frame, forms steam-pressing aero-concrete
Building block lightweight soil layer is equipped with metal mesh 4 on the autoclave aerated concrete building block lightweight soil layer upper berth, and equally, sequence is laid with upwards
One layer of autoclave aerated concrete building block lightweight soil layer re-lays the steam-pressing aero-concrete that one layer of metal mesh 4 is laid with until top
Building block lightweight soil layer upper berth sets the second anti-seepage geotextile or antiseepage mortar 9-2, in second anti-seepage geotextile or antiseepage mortar 9-2
On be equipped with geotechnical grid and add layer of sand 5, wherein each layer autoclave aerated concrete building block lightweight soil layer is wide from top to bottom
Degree successively increases, wherein making conventional fillers on the outside of multilayer autoclave aerated concrete building block lightweight soil layer, and tamp compression.Steam pressure
The longitudinal direction for the frame that air-entrained concrete building block 6 forms is located at the underface of track plates.
The present embodiment is upper subbase in the range of the downward 1m in roadbed top surface, and upper subbase uses wet density as 550-
600kg/m3Light soil poured in two times, between upper subbase and lower floor's roadbed be laid with one layer of metal mesh, prevent from pouring
There is crack in the light soil built, and lower floor's roadbed uses wet density as 500-550kg/m3Light soil poured in two times, it is whole
The dry density of autoclave aerated concrete building block in a roadbed uses 400-500kg/m3；Light soil is light for foam in this example
Matter soil is hardened by foaming agent, dilution, cement, water, early strength agent according to the preparation process of Foam lightweight soil through physical-chemical reaction
It forms.
The present embodiment roadbed construction method is as follows：
1st, the processing of ground is first carried out from the lower to the upper.
2nd, after basement process is complete, the leveling processing on surface is carried out, and one layer of anti-seepage geotextile is set, on the upper strata of geotextiles
The blotter 2 of place mat 10cm, blotter 2 sets 4% gradient from centre to both sides, after the completion of blotter laying, paving
If one layer of infiltration geotextiles.
3rd, it is built according to requirements such as design width, orbital position, frame structures using autoclave aerated concrete building block 6
It builds, pouring for light soil 3 is carried out after a part is built by laying bricks or stones, and make to build by laying bricks or stones, pour light soil 3 and the formation stream of filler 8 of both sides
Water operation until reaching designed elevation, needs to be laid with metal mesh, the pouring layer of top layer between lower floor's roadbed and upper subbase
Plastic covering film is wanted to carry out moisture-keeping maintaining in surface.
4th, the top of Foam lightweight soil sets one layer of anti-seepage geotextile or antiseepage mortar, and sets the geotechnique that thickness is 10cm
Cell compartment adds layer of sand 5, and upper part structure is the same as conventional railway roadbed design.
5th, it after the completion of overall structure, carries out brush slope and meets Railway Design requirement；And carry out slope protection project.
6th, the gradient of roadbed side slope is 1 in this example:1.5, in Foam lightweight soil base course at interval of 2 meters of settings, one PVC
Pipe carries out draining, and anti-seepage geotextile is polyethylene or polyvinyl chloride geotextiles.
Embodiment 2
A kind of Foam lightweight soil railway bed transition section structure of the utility model second embodiment, including：Bridges and culverts, ground
1st, autoclave aerated concrete building block 6, light soil 3, metal mesh 4 and geotechnical grid add layer of sand 5 to form, wherein the ground 1 is upper
The various forms of frames that face making is made of autoclave aerated concrete building block 6, the frame in the present embodiment are bar shaped or triangle
Shape pours light soil 3 in frame, forms autoclave aerated concrete building block lightweight soil layer, and the steam-pressing aero-concrete is built
Block lightweight soil layer from bottom to top can 3 layers of making, be geotechnological lattice positioned at top layer's autoclave aerated concrete building block lightweight soil layer top
Room adds layer of sand 5, wherein, the geotechnical grid add layer of sand 5 to each layer autoclave aerated concrete building block lightweight soil layer be from lower and
Upper width successively reduces.The metal mesh is arranged between three layers of autoclave aerated concrete building block lightweight soil layer.Described
Conventional fillers are filled, and tamp compression on the outside of three layers of autoclave aerated concrete building block lightweight soil layer.The light soil is lightweight
Soil is Foam lightweight soil.Other structures are the same as embodiment 1.
The above descriptions are merely preferred embodiments of the present invention, and not the utility model is made in any form
Limitation, although the utility model has been disclosed with preferred embodiment as above, be not limited to the utility model, it is any ripe
Professional and technical personnel is known, is not being departed from the range of technical solutions of the utility model, when in the technology using the disclosure above
Hold the equivalent embodiment made a little change or be modified to equivalent variations, as long as being without departing from technical solutions of the utility model
Hold, any simple modification, equivalent change and modification that foundation the technical essence of the utility model makees above example, still
Belong in the range of technical solutions of the utility model.
Claims (9)
1. a kind of Foam lightweight soil railway bed transition section structure, which is characterized in that it includes：Abutment or bridges and culverts, ground, steam pressure
Air-entrained concrete building block, light soil and geotechnical grid add layer of sand to form, wherein making is by steam pressurized mixed above the ground
The various forms of frames of solidifying earth building blocks composition, light soil is poured in frame, forms autoclave aerated concrete building block light soil
Layer, the autoclave aerated concrete building block lightweight soil layer from bottom to top can making multilayer, positioned at the steam pressurized coagulation of top layer
Earth building blocks lightweight soil layer top is that geotechnical grid adds layer of sand, wherein, the geotechnical grid adds layer of sand steam pressurized mixed to each layer
Solidifying earth building blocks lightweight soil layer is that width successively reduces from bottom to top.
2. a kind of Foam lightweight soil railway bed transition section structure according to claim 1, which is characterized in that in frame
It is Foam lightweight soil to pour the light soil.
3. a kind of Foam lightweight soil railway bed transition section structure according to any one in claim 1-2, feature
It is to further include metal mesh, the metal mesh is arranged between multilayer autoclave aerated concrete building block lightweight soil layer.
4. a kind of Foam lightweight soil railway bed transition section structure according to any one in claim 1-2, feature
Be to further include bed course, the bed course making on ground and bottom autoclave aerated concrete building block lightweight soil layer it
Under.
5. a kind of Foam lightweight soil railway bed transition section structure according to claim 4, it is characterised in that further include anti-
Geotextiles or antiseepage mortar are oozed, the anti-seepage geotextile or antiseepage mortar are arranged between the ground and the bed course
And it is arranged in top layer's autoclave aerated concrete building block lightweight soil layer and geotechnical grid adds between layer of sand.
6. a kind of Foam lightweight soil railway bed transition section structure according to any one in claim 1-2, feature
It is to further include filler, conventional fillers is filled, and tamp on the outside of the multilayer autoclave aerated concrete building block lightweight soil layer
It compresses.
A kind of 7. Foam lightweight soil railway bed transition section structure according to claim 1, it is characterised in that the steaming
The form of the frame of pressing aero-concrete building block composition includes well shape, bar shaped, triangle.
A kind of 8. Foam lightweight soil railway bed transition section structure according to claim 1, it is characterised in that the steaming
The longitudinal direction of the frame of pressing aero-concrete building block composition is located at the underface of track plates.
9. a kind of Foam lightweight soil railway bed transition section structure according to claim 1 or 2, it is characterised in that described
Foam lightweight soil, upper strata light soil density are 550-600kg/m3, other layers are 500-550kg/m3, described is steam pressurized mixed
The density of solidifying earth building blocks is 400-500kg/m3。
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| CN201720794088.8U CN207567570U (en) | 2017-07-03 | 2017-07-03 | A kind of Foam lightweight soil railway bed transition section structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019007176A1 (en) * | 2017-07-03 | 2019-01-10 | 中国铁道科学研究院铁道建筑研究所 | Foam light soil railway subgrade structure and construction method |
| CN113512951A (en) * | 2021-05-27 | 2021-10-19 | 中国二十冶集团有限公司 | Bridge and culvert abutment backfill geotextile laying method |
-
2017
- 2017-07-03 CN CN201720794088.8U patent/CN207567570U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019007176A1 (en) * | 2017-07-03 | 2019-01-10 | 中国铁道科学研究院铁道建筑研究所 | Foam light soil railway subgrade structure and construction method |
| CN113512951A (en) * | 2021-05-27 | 2021-10-19 | 中国二十冶集团有限公司 | Bridge and culvert abutment backfill geotextile laying method |
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