CN107938453A - Using construction technology of the Extra-fine sand as roadbed filling - Google Patents
Using construction technology of the Extra-fine sand as roadbed filling Download PDFInfo
- Publication number
- CN107938453A CN107938453A CN201610888258.9A CN201610888258A CN107938453A CN 107938453 A CN107938453 A CN 107938453A CN 201610888258 A CN201610888258 A CN 201610888258A CN 107938453 A CN107938453 A CN 107938453A
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- Prior art keywords
- roll
- roadbed
- fine sand
- extra
- vibrated roller
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Classifications
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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
- E01C3/04—Foundations produced by soil stabilisation
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The present invention be using construction technology of the Extra-fine sand as roadbed filling, step 1, optimum moisture content it is definite；Step 2, spread out determining for auxiliary thickness；The selection of step 3, construction equipment；Step 4, roller compaction process control：(1) it is divided into three phases to roll：Bull-dozer or vibrated roller static pressure 1 time, vibrated roller shake pressure 46 times, roll Shi Yingxian it is slow after it is fast, vibroroller cmpacting is carried out using strong shake, wheelmark overlapping widths be not less than 1/3m, and wheelmark is covered with whole work surface, roll and are controlled when travel speed starts within 4km/h；Roll from roadbed both sides to centre on straight line road section surface, rolled on curve road section surface by roadbed Inside To Outside, carried out with longitudinal advance and retreat formula, front and rear adjacent two section is answered more than longitudinal overlap 20m, is reached without leakage pressure, without dead angle, it is ensured that grind uniform；(2) vibrated roller rolls section using 50m 80m as unit, by behind vibration, first side after first static pressure, it is first slow after fast order roll 45 times.The present invention is simpler, quick, feasible, reduces cost.
Description
Technical field
The invention belongs to construction technology of paving the way, especially with construction technology of the Extra-fine sand as roadbed filling.
Background technology
Existing construction technology of paving the way is quickly grown, and the technique that roadbed material is served as by Extra-fine sand is left to be desired, and is allowed to more
For it is feasible, efficiently pave the way.
The content of the invention
It is simpler, fast it is an object of the invention to provide a kind of using construction technology of the Extra-fine sand as roadbed filling
It is fast, feasible, reduce cost.
The object of the present invention is achieved like this：It is a kind of using construction technology of the Extra-fine sand as roadbed filling, step 1,
Optimum moisture content determines：According to soil test, Extra-fine sand indoor standard compaction test, water content test section for 11% to
14%, optimum moisture content 13.6%, maximum dry density 1.74g/m3；Coefficient of compaction K is used for the compacting criteria of aeolian accumulation fine sand
With ground coefficient K30 as Con trolling index；Step 2, spread out determining for auxiliary thickness：Determine that maximum compacted thickness is 30cm-35cm；Step
Rapid 3, the selection of construction equipment：Using the bull-dozer of more than T120, using 8T-15T dumpers, using 8m3-15m3Sprinkling truck,
Select the vibrated roller of more than 14T front and rear wheels driving；Step 4, roller compaction process control：(1) it is divided into three phases to roll：Push away
Native machine or vibrated roller static pressure 1 time, vibrated roller shake pressure 4-6 times, roll Shi Yingxian it is slow after it is fast, using being vibrated by force
Roll, wheelmark overlapping widths are not less than 1/3m, and wheelmark is covered with whole work surface, roll and are controlled when travel speed starts in 4km/h
Within；Roll from roadbed both sides to centre on straight line road section surface, rolled on curve road section surface by roadbed Inside To Outside, with
Longitudinal advance and retreat formula carries out, and front and rear adjacent two section is answered more than longitudinal overlap 20m, reaches without leakage pressure, without dead angle, it is ensured that grind uniform；
(2) vibrated roller rolls section using 50m-80m as unit, by behind vibration, first side after first static pressure, it is first slow after fast order grind
Pressure 4-5 times.
When railway passes through desert area, using the filling roadbed reduction project cost not only shown of local Extra-fine sand material, and
And the water stability of Extra-fine sand is good, settle small after compacting, therefore, answer prioritizing selection Extra-fine sand to do filler in desert area.Early in two
The fifties in tenth century, packet header to Lanzhou railway do filler using Extra-fine sand, successively in Gan Tang to Wuwei railway, Kuerle to Keshen
Railway and 21st century have built more than ten thousand kilometers in the Northwests such as Inner Mongol, Ningxia, Shaanxi, Xinjiang, Qinghai.In recent years by
In the raising of railway standard, become new problem using Extra-fine sand as filler.The present invention is bordering on the river to Ejina Banner railway, Wu Lu
Wood is used as roadbed filling to Jinghe railway, Urumchi to quasi- Northeast Railway Bureau road by the use of Extra-fine sand together, it was demonstrated that its is simpler, quick,
It is feasible, reduce cost.
Embodiment
It is a kind of using construction technology of the Extra-fine sand as roadbed filling, step 1, optimum moisture content determine：According to geotechnique
Experiment, Extra-fine sand indoor standard compaction test, water content test section are 11% to 14%, and optimum moisture content 13.6% is maximum
Dry density 1.74g/m3；Coefficient of compaction K and ground coefficient K30 are used as Con trolling index for the compacting criteria of aeolian accumulation fine sand；
Step 2, spread out determining for auxiliary thickness：Extra-fine sand paving thickness is carried out from 20cm-60cm every 10cm different-thickness to roll contrast
Experiment, Extra-fine sand paving thickness is best in every layer of control effect between 30-35cm, determines that maximum compacted thickness is 30cm-
35cm；The selection of step 3, construction equipment：Using the bull-dozer of more than T120, using 8T-15T dumpers, using 8m3-15m3's
Sprinkling truck, selects the vibrated roller of more than 14T front and rear wheels driving；Step 4, roller compaction process control：(1) it is divided into three phases
Roll：Bull-dozer or vibrated roller static pressure 1 time, vibrated roller shake pressure 4-6 times, roll Shi Yingxian it is slow after it is fast, using shaking by force
Vibroroller cmpacting is carried out, wheelmark overlapping widths are not less than 1/3m, and wheelmark is covered with whole work surface, rolls control when travel speed starts
Within 4km/h；Rolled on straight line road section surface from roadbed both sides to centre, by roadbed Inside To Outside on curve road section surface
Roll, carried out with longitudinal advance and retreat formula, front and rear adjacent two section is answered more than longitudinal overlap 20m, is reached without leakage pressure, without dead angle, it is ensured that
Grind uniform；(2) vibrated roller rolls section using 50m-80m as unit, by behind vibration, first side after first static pressure, it is first slow after it is fast
Order roll 4-5 times.Through practice test, for Extra-fine sand compactness when being close to or up to maximum dry density, internalfrictionangleφ is most
Its big shearing strength is also maximum, and motor vehicles and machines can more freely traveling or the work on soil layer.
According to the climatic characteristic of desert region and the special process of Extra-fine sand subgrade construction, unit in charge of construction is by following during construction
Points for attention are constructed：(1) scorching temperature and dust and sand weather at noon are avoided as far as possible, and the temperature on average of desert summer is at 35 DEG C
More than, personnel and machinery are difficult to bear, and the construction time considered at early, evening and night as far as possible.In dust and sand weather, machinery is unsuitable
Go to work, sand and dust have mechanical equipment larger destruction.(2) paragraph division of constructing is unsuitable long, is advisable with 300m-500m,
It should concentrate strength on being promoted from route one end, and each construction paragraph is joined together as early as possible, easy to all mechanical equipments especially
It is the unified allocation of resources of rubber tire, vibrated roller, improves the utilization rate of equipment.Meanwhile by the use of molded roadbed as builder's road,
It is greatly improved the conevying efficiency of vehicle.(3) during roadbed testing, since top layer disturbs, influence to detect quality, generally at detection
Detected after first rooting out 5cm thickness disturbed soils, detection result is more preferable.
Effect inspection：In construction, repeatedly filling roadbed to test section Extra-fine sand to be detected, subgrade compaction coefficient is more than
Target set point 0.90 is 0.93, and ground coefficient K30 (MPa/m) reaches 90, more than target set point 90.Therefore, it is thin using powder
Sand is filling roadbed, and construction follows the principle of above construction technology, reaches preferable consolidation effect, subgrade compaction coefficient (K) and ground
Base system number (K30) can meet design requirement.It is to resolve construction water, once spread out first for desert subgrade
Paving eluvium layer thickness, spill the problems such as frequency of water rate control and number of rolling, vibroroller cmpacting, should follow short, fast original
Then, that is, constructing, paragraph is preferably short, and speed of application is fast, and each operation construction is compact；Layer is being filled to the machinery such as haulage vehicle, road roller
There are sufficient mental preparation and necessary measure during upper operation, overcome construction machinery to skid on Extra-fine sand roadbed, fall into car, this
The characteristics of being Extra-fine sand subgrade construction a bit and the key different from the construction of other soil subgrades.
Technical standard：According to《Railway bed design specification》(TB10001-2005J447-2005), roadbed top layer filler is equal
For A, B group filler.Bottom layer of subgrade and its underpart are to Extra-fine sand to be compacted coefficient and coefficient of subgrade reaction as Con trolling index, such as table
1 and table 2 described in.The I level railways of once-paving gapless track, embankment and abutment, embankment and the junction transition of ragstone cutting
The compacting criteria of section filler should meet the regulation of 7.5.3 bars.
The compacting criteria tables of data of 1 bottom layer of subgrade of table
Note：In fine grained soil, flour sand, one column of conditioned soil, have bracket is only the compacting criteria of conditioned soil, no bracket for particulate
Soil, flour sand, the compacting criteria of conditioned soil.
2 levee foundation bed of table is with the compacting criteria tables of data of lower portion filler
Note：It is sandy soil (except flour sand) in bracket, the compacting criteria for the native filler that seeps water in gravel class, rubble class, block stone class.
Claims (1)
- It is 1. a kind of using construction technology of the Extra-fine sand as roadbed filling, it is characterised in that：Step 1, optimum moisture content determine： According to soil test, Extra-fine sand indoor standard compaction test, water content test section is 11% to 14%, optimum moisture content 13.6%, Maximum dry density 1.74g/m3；Referred to for the compacting criteria of aeolian accumulation fine sand using coefficient of compaction K and ground coefficient K30 as control Mark；Step 2, spread out determining for auxiliary thickness：Determine that maximum compacted thickness is 30cm -35cm；The selection of step 3, construction equipment：Adopt With the bull-dozer of more than T120, using 8T-15T dumpers, using the sprinkling truck of 8m3-15m3, more than 14T front and rear wheels are selected to drive Dynamic vibrated roller；Step 4, roller compaction process control：(1) it is divided into three phases to roll：Bull-dozer or vibrated roller static pressure 1 Time, vibrated roller, which shakes, presses 4-6 times, fast after rolling Shi Yingxian slowly, not small using the strong progress vibroroller cmpacting that shakes, wheelmark overlapping widths In 1/3m, wheelmark is covered with whole work surface, rolls and is controlled when travel speed starts within 4km/h；On straight line road section surface by Roadbed both sides are rolled to centre, are rolled on curve road section surface by roadbed Inside To Outside, are carried out with longitudinal advance and retreat formula, front and rear phase Adjacent two sections are answered more than longitudinal overlap 20m, are reached without leakage pressure, without dead angle, it is ensured that grind uniform；(2) vibrated roller is with 50m-80m Roll section as unit, by behind vibration, first side after first static pressure, it is first slow after fast order roll 4-5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888258.9A CN107938453A (en) | 2016-10-12 | 2016-10-12 | Using construction technology of the Extra-fine sand as roadbed filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888258.9A CN107938453A (en) | 2016-10-12 | 2016-10-12 | Using construction technology of the Extra-fine sand as roadbed filling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107938453A true CN107938453A (en) | 2018-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610888258.9A Pending CN107938453A (en) | 2016-10-12 | 2016-10-12 | Using construction technology of the Extra-fine sand as roadbed filling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108570909A (en) * | 2018-05-15 | 2018-09-25 | 西南交通大学 | A kind of Extra-fine sand roadbed fills debulking methods |
| CN109610244A (en) * | 2018-12-25 | 2019-04-12 | 四川天鑫达建筑工程有限公司 | The physically improved roadbed filling method of fine silt |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2179609C1 (en) * | 2000-06-15 | 2002-02-20 | Строительное научно-техническое малое предприятие "ЭЗИП" | Road pavement laying method |
| CN101503871A (en) * | 2009-03-19 | 2009-08-12 | 中铁十一局集团有限公司 | Dry-method construction method for drift-sand roadbed |
| CN101962928A (en) * | 2010-08-12 | 2011-02-02 | 中铁二十二局集团第一工程有限公司 | Construction method for processing aeolian sand roadbed base through impacting and grinding |
| CN104047214A (en) * | 2014-07-10 | 2014-09-17 | 中国二十二冶集团有限公司 | Roadbed construction method adopting aeolian sand filling |
| CN105544335A (en) * | 2016-02-03 | 2016-05-04 | 中交第一公路勘察设计研究院有限公司 | Construction method for filling and compacting thick-layer aeolian sand subgrade |
-
2016
- 2016-10-12 CN CN201610888258.9A patent/CN107938453A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2179609C1 (en) * | 2000-06-15 | 2002-02-20 | Строительное научно-техническое малое предприятие "ЭЗИП" | Road pavement laying method |
| CN101503871A (en) * | 2009-03-19 | 2009-08-12 | 中铁十一局集团有限公司 | Dry-method construction method for drift-sand roadbed |
| CN101962928A (en) * | 2010-08-12 | 2011-02-02 | 中铁二十二局集团第一工程有限公司 | Construction method for processing aeolian sand roadbed base through impacting and grinding |
| CN104047214A (en) * | 2014-07-10 | 2014-09-17 | 中国二十二冶集团有限公司 | Roadbed construction method adopting aeolian sand filling |
| CN105544335A (en) * | 2016-02-03 | 2016-05-04 | 中交第一公路勘察设计研究院有限公司 | Construction method for filling and compacting thick-layer aeolian sand subgrade |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108570909A (en) * | 2018-05-15 | 2018-09-25 | 西南交通大学 | A kind of Extra-fine sand roadbed fills debulking methods |
| CN109610244A (en) * | 2018-12-25 | 2019-04-12 | 四川天鑫达建筑工程有限公司 | The physically improved roadbed filling method of fine silt |
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Application publication date: 20180420 |
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