CN108360322A - A kind of Gypsisol embankment fill material and construction method - Google Patents
A kind of Gypsisol embankment fill material and construction method Download PDFInfo
- Publication number
- CN108360322A CN108360322A CN201810109909.9A CN201810109909A CN108360322A CN 108360322 A CN108360322 A CN 108360322A CN 201810109909 A CN201810109909 A CN 201810109909A CN 108360322 A CN108360322 A CN 108360322A
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- Prior art keywords
- embankment
- gypsisol
- fill material
- construction method
- embankment fill
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Agronomy & Crop Science (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Road Paving Structures (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a kind of Gypsisol embankment fill material and construction methods.The Gypsisol embankment fill material includes：Embankment fill material under bedding is Gypsisol original soil；Embankment of roadbed bottom filler makes a sudden snatch 1 for Gypsisol original soil and mountain:1 mixture；And surface layer of subgrade bed embankment fill material, make a sudden snatch 1 for Gypsisol original soil and mountain:1 blends the mixture that every cube of earth material addition 100kg flyash is formed again.Gypsisol embankment fill material provided by the invention and construction method, reduce the quantity for abandoning the earthwork, save engineering cost, reduce the influence to environment.
Description
Technical field
The present invention relates to railway engineering technology fields, and in particular to a kind of Gypsisol embankment fill material and construction method.
Background technology
Gypsisol (gypseous gravelly soil, gravelly sand soil) distribution of strata area is wide, thickness is big.Gypsum in Gypsisol belongs to
Middle dissolved salt (gypsum dissolution degree is 2 ‰ or so at the standard conditions), can be dissolved in water and take away, cause Gypsisol have the swollen property of pine,
Dilatancy and shrinkage.People are inexperienced as embankment fill material to Gypsisol at present, cause Gypsisol to be not yet written related
Geotechnical investigation specification cannot act as substrate or filler for building.In previous railway construction, to the stone of exposure in field of fetching earth
Cream soil needs are purged, and change filling out to the Gypsisol that embankment underlies.
Gypsisol is purged or is changed and is filled out, builder's road length certainly will be increased, increases side's amount of spoir, increases spoil ground
Scale.Therefore, influence degree of the engineering construction to environment can be obviously increased, and increases project cost.
Invention content
In order to solve the above technical problems, a kind of Gypsisol embankment fill material of present invention offer and construction method.The present invention passes through
Indoor and field test proposes that Gypsisol is used as the ameliorative measure of embankment fill material and the construction technology of embankment.
To achieve the above object, the present invention uses following technical scheme：
One aspect of the present invention provides a kind of Gypsisol embankment fill material, including：
Embankment fill material under bedding is Gypsisol original soil；
Embankment of roadbed bottom filler makes a sudden snatch 1 for Gypsisol original soil and mountain:1 mixture；And
Surface layer of subgrade bed embankment fill material makes a sudden snatch 1 for Gypsisol original soil and mountain:1, which blends every cube of earth material again, adds 100kg fine coal
The mixture that ash is formed.
Another aspect of the present invention also provides the construction method of above-mentioned Gypsisol embankment fill material, includes the following steps：
1) embankment fill material is prepared；
2) railway embankment；
Embankment fill material under the bedding of bedding lower part loose laying depth 45cm, the bottom layer of subgrade of bottom layer of subgrade loose laying depth 40cm
Embankment fill material, the surface layer of subgrade bed embankment fill material of surface layer of subgrade bed loose laying depth 35cm；One layer has often been spread once to be compacted；
3) embankment slope surface is handled.
Preferably, the technique of the compacting is：Weak shake+1 time of the static pressure+2 times of 22T vibrated rollers 1 time is shaken by force.
In an advantageous embodiment, step 3) processing embankment slope surface is specially to use gravelly soil Bao Po.
It is highly preferred that the thickness of the gravelly soil Bao Po is 0.2m.
In another preferred embodiment, it is specially that embankment both sides are widened that step 3), which handles embankment slope surface,.
It is highly preferred that 0.5m is respectively widened in embankment both sides.
Beneficial effects of the present invention
Gypsisol embankment fill material provided by the invention and construction method, reduce the quantity for abandoning the earthwork, save engineering
Expense reduces the influence to environment.
Description of the drawings
Fig. 1 changes for Gypsisol leaching deformation coefficient.
Fig. 2 is the sectional schematic diagram of common railway embankment.
Specific implementation mode
The present invention is specifically described below by embodiment, it is necessary to which indicated herein is that the present embodiment is served only for pair
The present invention is further described, and should not be understood as limiting the scope of the invention, and the person skilled in the art in the field can
To make some nonessential modifications and adaptations according to the content invented above.In the absence of conflict, the reality in the present invention
The feature applied in example and embodiment can be combined with each other.
The technical issues of to solve to make embankment fill material using Gypsisol, following scientific research is carried out：
1, Gypsisol physical and mechanical parameter is tested
(1) salt content of Gypsisol
Its chemical composition and content analyzed to level land Gypsisol soil sample and mountainous region Gypsisol soil sample, measure soluble salt content and
Middle dissolved salt content, the results are shown in Table 1.
The salt content of 1 Gypsisol of table
(2) swelling rate test of Gypsisol
Totally 18 samples, i.e.,：Level land Gypsisol soil sample 3, mountainous region Gypsisol soil sample 3, level land Gypsisol make a sudden snatch again with mountain
Measure ratio 2:1 aggregate sample 3, level land Gypsisol and mountain make a sudden snatch weight ratio 1:2 aggregate samples 3, every cube of level land Gypsisol incorporation 50
Kilogram II grades of flyash aggregate samples 3, every cube of level land Gypsisol mix 100 kilograms of II grades of flyash aggregate samples 3.It carries out swollen
Swollen rate experiment, is divided into no-load swelling rate test and linear swelling ratio tests two parts, the results are shown in Table 2；Each soil sample number
According to the average value for taking respective 3 parallel tests.
The expansion rate of 2 Gypsisol of table
2, Leaching test (having load) in Gypsisol room
3 groups of totally 6 groups of soil samples, respectively 3 groups of level land Gypsisol and mountainous region Gypsisol.Soil sample is numbered：Level land 1-1
(the 1st sample of the 1st group of level land Gypsisol), level land 1-2 (the 2nd sample of the 1st group of level land Gypsisol), and so on, it prepares altogether
18 soil samples, soil sample height 20mm.Measure lixiviation deformation coefficient under loads at different levels of level land Gypsisol and mountainous region Gypsisol and
Stabilization time.It the results are shown in Table 3；Each soil sample data takes the average value of respective 3 groups of parallel tests.
Sample collapsible settement amount and stabilization time average value under 3 load at different levels of table
3, pour to strain to test (no-load) in Gypsisol room
Totally 18 samples, i.e.,：Level land Gypsisol soil sample 3, mountainous region Gypsisol soil sample 3, level land Gypsisol make a sudden snatch again with mountain
Measure ratio 2:1 aggregate sample 3, level land Gypsisol and mountain make a sudden snatch weight ratio 1:2 aggregate samples 3, every cube of level land Gypsisol incorporation 50
Kilogram II grades of flyash aggregate samples 3, every cube of level land Gypsisol mix 100 kilograms of II grades of flyash aggregate samples 3.Simulation 30
Under the conditions of annual rainfall, the breathing variable quantity of soil sample.It the results are shown in Table 4, Fig. 1；Each soil sample data takes the flat of respective 3 parallel tests
Mean value.
4 pour to strain to test soil sample average deformation coefficient of table
4, live embankment test section fills
Fill length 40m, bottom layer width 16m, ratio of slope 1:1.5 embankment test section.
1) former gypsum earth material is filled out successively from the bottom up, every cube of former Gypsisol mixes 50 kilograms of II grades of coal ash mixed materials,
Every cube of former Gypsisol mixes 100 kilograms of II grades of coal ash mixed materials, former gypsum earth material, and former Gypsisol splits weight ratio 2 with mountain:1
Mixture, former Gypsisol split weight ratio 1 with mountain:2 mixtures, the good gravel earth material of grading.
2) every layer of loose laying depth 40cm is pressed using 22T vibrated rollers by+2 times weak+1 time strong shake of shaking of 1 time static pressure
It is real.
3) it after the completion of every layer of spreading, measures the compactness banketed and layer top mark is high.
5 live embankment test section consolidation effect inspections
After the completion of every layer is banketed and rolls, K is used30To check that consolidation effect, measurement result are shown in Table 5.
The coefficient of subgrade reaction that every layer of table 5 bankets
The compactibility of survey region filler is preferable, and original soil and aggregate sample can reach railway road by common compaction process
The compaction requirement of dike surface layer of subgrade bed.I grades of railroad embankment gravel class soil coefficient of subgrade reaction K30, 1.0 are required under bedding, bottom layer of subgrade
1.2, surface layer of subgrade bed 1.5.
6, live embankment test section observation
Under local condition of raining, observation and measurement test section embankment Infiltration, banket ingredient leaching and Embankment Subsidence
Situation.
According to the test data of indoor and outdoor, to Gypsisol just like drawing a conclusion：
1) salt content is higher, can reach 20%~30%.
2) there is dilatancy, linear swelling ratio is 1% or so after absorbing water；There is molten sunken property, lixiviation under the conditions of leaching
The effect of deflection no-load is lower up to 2%~3%, has under load action up to 5%~10%.
3) compactibility is preferable, is that can reach the compaction requirement of railroad embankment surface layer of subgrade bed using common compaction process.
4) incorporation that mountain makes a sudden snatch reduces the content of salinity in Gypsisol, thus can reduce Gypsisol dilatancy and it is molten fall into
Property.The incorporation that mountain makes a sudden snatch increases Gypsisol coarse grain component, therefore improves the permeability and compactibility of Gypsisol.
5) flyash has improving effect to Gypsisol.Incorporation flyash can obviously reduce the permeability of Gypsisol, dilatancy
With molten sunken property.
According to above-mentioned conclusion, with reference to figure 2, it is as follows that present invention proposition uses Gypsisol to carry out the step of railroad embankment fills：
1) embankment fill material is prepared.Embankment fill material under bedding：Directly use Gypsisol original soil；Embankment of roadbed bottom filler：Stone
Cream soil original soil and mountain make a sudden snatch 1:1 mixture；Surface layer of subgrade bed embankment fill material：Original soil and mountain make a sudden snatch 1:1, which blends again every cube of earth material, adds
The mixture for adding 100kg flyash to be formed.
2) railway embankment.Embankment fill material under the bedding of bedding lower part loose laying depth 45cm, bottom layer of subgrade loose laying depth
The embankment of roadbed bottom filler of 40cm, the surface layer of subgrade bed embankment fill material of surface layer of subgrade bed loose laying depth 35cm；One layer of progress is often spread
Primary compacting；It is that can reach the compaction requirement of railroad embankment surface layer of subgrade bed using common compaction process.Preferably, it is compacted work
Skill is that weak shake+1 time of the static pressure+2 times of 22T vibrated rollers 1 time is shaken by force.
3) embankment slope surface is handled：Widened using gravelly soil Bao Po or embankment both sides.
When using gravelly soil packet slope, the thickness of the gravelly soil Bao Po is preferably 0.2m.
When being widened using embankment both sides, it is preferable that 0.5m is respectively widened in embankment both sides.
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, the scope of the present invention is belonged to.
Claims (7)
1. a kind of Gypsisol embankment fill material, which is characterized in that the Gypsisol embankment fill material includes：
Embankment fill material under bedding is Gypsisol original soil；
Embankment of roadbed bottom filler makes a sudden snatch 1 for Gypsisol original soil and mountain:1 mixture；And
Surface layer of subgrade bed embankment fill material makes a sudden snatch 1 for Gypsisol original soil and mountain:1, which blends every cube of earth material again, adds 100kg flyash shapes
At mixture.
2. the construction method of Gypsisol embankment fill material described in a kind of claim 1, which is characterized in that include the following steps：
1) embankment fill material is prepared；
2) railway embankment；
Embankment fill material under the bedding of bedding lower part loose laying depth 45cm, the embankment of roadbed bottom of bottom layer of subgrade loose laying depth 40cm
Filler, the surface layer of subgrade bed embankment fill material of surface layer of subgrade bed loose laying depth 35cm；One layer has often been spread once to be compacted；
3) embankment slope surface is handled.
3. construction method according to claim 2, which is characterized in that the technique of the compacting is：22T vibrated rollers 1
It shakes by force all over+2 times weak shake+1 time of static pressure.
4. construction method according to claim 2, which is characterized in that it is specially to use rubble that step 3), which handles embankment slope surface,
Native Bao Po.
5. construction method according to claim 4, which is characterized in that the thickness of the gravelly soil Bao Po is 0.2m.
6. construction method according to claim 2, which is characterized in that it is specially embankment both sides that step 3), which handles embankment slope surface,
Widen.
7. construction method according to claim 6, which is characterized in that 0.5m is respectively widened in embankment both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810109909.9A CN108360322A (en) | 2018-02-05 | 2018-02-05 | A kind of Gypsisol embankment fill material and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810109909.9A CN108360322A (en) | 2018-02-05 | 2018-02-05 | A kind of Gypsisol embankment fill material and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN108360322A true CN108360322A (en) | 2018-08-03 |
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ID=63004837
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| CN201810109909.9A Pending CN108360322A (en) | 2018-02-05 | 2018-02-05 | A kind of Gypsisol embankment fill material and construction method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4397899A (en) * | 1980-10-03 | 1983-08-09 | True Temper Corporation | Variable thickness mat for use at the stress transition zone juncture of a bridge-roadway or the juncture of a railroad crossing-roadway |
| CN1683719A (en) * | 2004-09-07 | 2005-10-19 | 陈永烽 | Expansion soil ecological modifying agent and construction method |
| 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 |
| CN205348198U (en) * | 2015-12-30 | 2016-06-29 | 中铁第四勘察设计院集团有限公司 | Native karst cutting reinforced structure expands |
-
2018
- 2018-02-05 CN CN201810109909.9A patent/CN108360322A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4397899A (en) * | 1980-10-03 | 1983-08-09 | True Temper Corporation | Variable thickness mat for use at the stress transition zone juncture of a bridge-roadway or the juncture of a railroad crossing-roadway |
| CN1683719A (en) * | 2004-09-07 | 2005-10-19 | 陈永烽 | Expansion soil ecological modifying agent and construction method |
| 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 |
| CN205348198U (en) * | 2015-12-30 | 2016-06-29 | 中铁第四勘察设计院集团有限公司 | Native karst cutting reinforced structure expands |
Non-Patent Citations (1)
| Title |
|---|
| 于强哉: "铁路沿线含石膏土的工程性质及处理措施研究", 《建筑施工》 * |
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Application publication date: 20180803 |
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