CN109610244A - The physically improved roadbed filling method of fine silt - Google Patents
The physically improved roadbed filling method of fine silt Download PDFInfo
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- CN109610244A CN109610244A CN201811595515.5A CN201811595515A CN109610244A CN 109610244 A CN109610244 A CN 109610244A CN 201811595515 A CN201811595515 A CN 201811595515A CN 109610244 A CN109610244 A CN 109610244A
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- sand
- bound edge
- roadbed
- filling method
- roadbed filling
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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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Abstract
The present invention relates to a kind of roadbed filling methods that fine silt is physically improved, it is characterized by comprising following steps: land clearing, the setting of rubble french drain, bound edge soil fill, and sand pocket builds side, sand material paves smooth, water content control, is rolled, closedtop layer fills, sand-filled subgrade buries sedimentation plate and displacement observation stake in feature section as required respectively, carries out the sedimentation and displacement observation of sand road base.The construction technology, which is used, has good economy and social effect, and the price of one side fine sand is relatively low, and has that water stability is good, Equalsettlement, and when construction is influenced small feature by water and unfavourable season, and when construction is substantially shorter the duration；On the other hand, the Successful utilization of the technique is the broken meeting of resource and environment generation that can avoid taking soil to locality, and can be with dredged channel, protecting ecology.In the area that part is limited by natural geological conditions, using Extra-fine sand as roadbed filling, and the basic demand that roadbed is built can satisfy after using the program.
Description
Technical field
The present invention relates to the technical fields of construction, more particularly, to a kind of roadbed filling side that fine silt is physically improved
Method.
Background technique
The stability of high-speed railway subgrade is the major issue being concerned about in the industry, due to the filling roadbed material of high-speed railway and road
The quality control index of the original material of basal part can be with ambient moisture, temperature during entire construction and road service
And the factors such as load variation and change, so physical property (grain composition, rate of decay of high-speed railway based filler itself
With moisture content etc.), the Con trolling index of construction technology and construction quality there is uncertainty, cause the roadbed pair of different fillers
The service life of high-speed railway subgrade has a great impact.
But due to being limited in some areas by natural geological conditions, part route need to be passed through based on Extra-fine sand
Harmful engineering ground region.Since Extra-fine sand sand grains content is big, clay content is small, it is not easy to form plate body, after immersion vibration easily
Liquefaction, loose, caking property and plasticity all very littles when dry are wanted substantially using what conventional construction method was unable to satisfy that roadbed builds
It asks.
Summary of the invention
The purpose of the present invention is to provide a kind of roadbed filling methods that fine silt is physically improved, and fine silt can be used by having
Meet the advantages of roadbed builds basic demand.
Above-mentioned technical purpose of the invention has the technical scheme that a kind of fine silt is physically improved
Roadbed filling method, comprising the following steps:
S1: land clearing is constructed using bull-dozer hand fit, the weeds on original ground, humus is scavenged into roadbed range
In addition, tree root is removed using excavator；
S2: laterally every 20 meters of one of setting rubble weeper drains are longitudinally led in the setting of rubble french drain along roadbed two sides slope foot；
S3: bound edge soil fills, and along roadbed two sides setting bound edge soil, bound edge soil setting width should be able to meet compacting machinary walking and have
The requirement of effect compacting width, when construction, should increase width suitably to ensure that edge compaction quality, bound edge soil and sand core should be filled out simultaneously
It builds, synchronize and roll；
S4: sand pocket builds side, after the completion of bound edge soil placement in layers, is prevented using the form that sand pocket builds side sand core in its internal layer
Shield, build while when on the outside of sand core 1.5 meters at manual zoning base while；
S5: sand material paves smooth, and sand material is high by Lu Zhizheng using crawler dozer, and low pave of trackside is paved, and then uses level land
Machine essence is flat；
S6: water content control, fill during use sprinkle water mode with the water content to optimum moisture content of additional fillers near；
S7: rolling, first using 8 ~ 10 tons twice of dual-steel wheel road roller static pressure, it is low with 14 ~ 24 xanthan wheel vibratory rollers after pressure stabilizing
Frequently high arc vibration rolls, and last static pressure receives face；
S8: closedtop layer fills, sand-filled subgrade closedtop layer use cement stabilizing fine sand, 50 centimetres of thickness, cement mixing content 3%；
S9: detection, sand-filled subgrade bury sedimentation plate and displacement observation stake in feature section as required respectively, carry out the heavy of sand road base
Drop and displacement observation, sedimentation and displacement observation data are supplied to designer in time, are dived by software for calculation to sand-filled subgrade
It is analyzed in sliding surface condition, safety coefficient and the deformation expection of operation phase.
Through the above technical solutions, the price of one side fine sand is relatively low, and the good, Equalsettlement with water stability, apply
Working hour is influenced small feature by water and unfavourable season, and when construction is substantially shorter the duration, on the other hand, the successful fortune of the technique
There is extremely important meaning with to the area for taking soil relatively difficult, that is, can avoid taking soil broken to local resource and environment generation
Meeting, and can be with dredged channel, protecting ecology.In the area that part is limited by natural geological conditions, using Extra-fine sand as road
Based filler, and can satisfy the basic demand that roadbed is built after using the program.
Preferably, sand pocket width is not less than 60 centimetres after encapsulation, and compacted thickness is not less than 20 centimetres after accumbency.
Through the above technical solutions, being easy to happen sliding collapsing etc. when sand pocket is too small, the effect to sand core protection is not had
Fruit can be expired by multistage construction test when sand pocket width is not less than 60 centimetres, and compacted thickness is not less than 20 centimetres after accumbency
Foot needs.
Preferably, the depth of land clearing is not less than 20 centimetres in S1, flattens simultaneously after the completion of land clearing step to ground
Jolt ramming is rolled, ground compactness is not less than 90%.
Through the above technical solutions, guaranteeing the requirement of ground intensity, phase ground generation large scale sedimentation after construction is avoided.
It preferably, is layering filler in S5, every layer of loose laying depth control is less than or equal to 30 centimetres when filler.
Through the above technical solutions, ensure every layer can be tightly compacted, such as every layer of loose laying depth it is too big, will lead to nothing
Every layer of tightly compacted problem is seriously affected the performance of roadbed, roadbed is caused to be easy to happen large scale in the later period by method
Sedimentation.
Preferably, water content should be supplemented to greater than optimum moisture content in S6, and control the optimum moisture content greater than 2% with
It is interior.
Through the above technical solutions, the water content control of fine sand is the core that sand fills out subgrade construction technique, fine sand when rolling
Water penetration it is relatively good, the water content of filler is less than optimum moisture content under normal conditions, therefore can reach by supplementing water and set
It counts and needs, and when supplementing water, part water is easy evaporation equal loss, therefore usually requires for water to be supplemented to aqueous greater than best
Amount.
Preferably, lime is added in bound edge soil when bound edge soil fills in S3, is improved with the performance to bound edge soil.
Through the above technical solutions, lime is one kind with calcium oxide air-setting inorganic coagulation material as main component, stone
Intensity is higher and be not easy the advantages of collapsing ash can reach compacting after mixing and stirring with soil after.
Preferably, it is rolled when being rolled in S7 by rubber tire vibratory roller at least 36 times.
Through the above technical solutions, guaranteeing the intensity requirement of roadbed, so that roadbed is less prone to sedimentation after building
Too excesssive problem.
Preferably, sand pocket is made of geotextiles in S4.
Through the above technical solutions, geotextiles strength is high, due to using plastic optical fibre, can keep filling under dry and wet state
The strength and elongation divided, it is corrosion-resistant, can be muchly corrosion-resistant in the soil and water of different pH values, good water permeability, in fibre
There is gap between dimension, therefore have good permeability performance, microbial resistance is good, to microorganism, damages by worms without damage, when in use may be used
Guarantee that sand pocket is not easily broken.
In conclusion the present invention has the beneficial effect that the construction technology is used with good warp in contrast to the prior art
Ji property and social effect, the price of one side fine sand are relatively low, and have that water stability is good, Equalsettlement, when construction by water and
The small feature of influence of unfavourable season, when construction, are substantially shorter the duration, and on the other hand, the Successful utilization of the technique is to taking native ratio
There is extremely important meaning in more difficult area, that is, can avoid taking soil to generate broken meeting to local resource and environment, and can be with
Dredged channel, protecting ecology.In the area that part is limited by natural geological conditions, using Extra-fine sand as roadbed filling, and
The basic demand built using can satisfy roadbed after the program.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the construction process figure of embodiment.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
A kind of roadbed filling method that fine silt is physically improved, as shown in Figure 1, comprising the following steps:
S1: land clearing is constructed using bull-dozer hand fit, the weeds on original ground, humus is scavenged into roadbed range
In addition, tree root is removed using excavator；
S2: laterally every 20 meters of one of setting rubble weeper drains are longitudinally led in the setting of rubble french drain along roadbed two sides slope foot；
S3: bound edge soil fills, and along roadbed two sides setting bound edge soil, bound edge soil setting width should be able to meet compacting machinary walking and have
The requirement of effect compacting width, when construction, should increase width suitably to ensure that edge compaction quality, bound edge soil and sand core should be filled out simultaneously
It builds, synchronize and roll；
S4: sand pocket builds side, after the completion of bound edge soil placement in layers, is prevented using the form that sand pocket builds side sand core in its internal layer
Shield, build while when on the outside of sand core 1.5 meters at manual zoning base while；
S5: sand material paves smooth, and sand material is high by Lu Zhizheng using crawler dozer, and low pave of trackside is paved, and then uses level land
Machine essence is flat；
S6: water content control, fill during use sprinkle water mode with the water content to optimum moisture content of additional fillers near；
S7: rolling, first using 8 ~ 10 tons twice of dual-steel wheel road roller static pressure, it is low with 14 ~ 24 xanthan wheel vibratory rollers after pressure stabilizing
Frequently high arc vibration rolls, and last static pressure receives face；
S8: closedtop layer fills, sand-filled subgrade closedtop layer use cement stabilizing fine sand, 50 centimetres of thickness, cement mixing content 3%；
S9: detection, sand-filled subgrade bury sedimentation plate and displacement observation stake in feature section as required respectively, carry out the heavy of sand road base
Drop and displacement observation, sedimentation and displacement observation data are supplied to designer in time, are dived by software for calculation to sand-filled subgrade
It is analyzed in sliding surface condition, safety coefficient and the deformation expection of operation phase.
Wherein, it is easy to happen sliding collapsing etc. when sand pocket is too small, does not have the effect to sand core protection, is applied by multistage
Work test, sand pocket width is not less than 60 centimetres after encapsulation, can satisfy needs when compacted thickness is not less than 20 centimetres after accumbency.
The depth of land clearing is not less than 20 centimetres in S1, flattens to ground after the completion of land clearing step and rolls vibration
Real, ground compactness is not less than 90%, and ground undesirable for intensity should change filling out after compacting, and compaction in layers is arrived
Prescribed requirement.
Lime is added in bound edge soil when bound edge soil fills in S3, is improved with the performance to bound edge soil, lime is one
Kind with calcium oxide air-setting inorganic coagulation material as main component, lime and soil can reach after mixing and stirring intensity after compacting it is higher and
It is not easy the advantages of collapsing.
It is layering filler in S5 in order to ensure every layer can be tightly compacted, every layer of loose laying depth control when filler
Less than or equal to 30 centimetres, such as every layer of loose laying depth is too big, and will lead to can not seriously affect roadbed for every layer of tightly compacted problem
Performance, cause roadbed the later period be easy to happen in large scale sedimentation.
The water content control of fine sand is the core that sand fills out subgrade construction technique when rolling, and the water penetration of fine sand is relatively good, leads to
The water content of filler is less than optimum moisture content in normal situation, and when supplementing water, part water is easy evaporation equal loss, therefore S6
Middle water content should be supplemented to greater than optimum moisture content, and be controlled within the optimum moisture content greater than 2%.
It is rolled when being rolled in S7 by rubber tire vibratory roller at least 36 times, guarantees the intensity requirement of roadbed, so that roadbed
Subsiding extent excessive problem is less prone to after building.
The features such as geotextiles strength is high, corrosion-resistant, good water permeability, microbial resistance is good, therefore sand pocket uses geotechnique in S4
Cloth is made, therefore certifiable sand pocket is not easily broken in use.
The construction technology, which is used, has good economy and social effect, and the price of one side fine sand is relatively low, and
The good, Equalsettlement with water stability, when construction, are influenced small feature by water and unfavourable season, and when construction is substantially shorter work
There are extremely important meaning in phase, on the other hand, the Successful utilization of the technique to the area for taking soil relatively difficult, that is, can avoid taking
Soil generates broken meeting to local resource and environment, and can be with dredged channel, protecting ecology.It is limited in part by natural geological conditions
Area, using Extra-fine sand as roadbed filling, and using can satisfy the basic demand that roadbed is built after the program.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (8)
1. a kind of roadbed filling method that fine silt is physically improved, it is characterised in that: the following steps are included:
S1: land clearing is constructed using bull-dozer hand fit, the weeds on original ground, humus is scavenged into roadbed range
In addition, tree root is removed using excavator；
S2: laterally every 20 meters of one of setting rubble weeper drains are longitudinally led in the setting of rubble french drain along roadbed two sides slope foot；
S3: bound edge soil fills, and along roadbed two sides setting bound edge soil, bound edge soil setting width should be able to meet compacting machinary walking and have
The requirement of effect compacting width, when construction, should increase width suitably to ensure that edge compaction quality, bound edge soil and sand core should be filled out simultaneously
It builds, synchronize and roll；
S4: sand pocket builds side, after the completion of bound edge soil placement in layers, is prevented using the form that sand pocket builds side sand core in its internal layer
Shield, build while when on the outside of sand core 1.5 meters at manual zoning base while；
S5: sand material paves smooth, and sand material is high by Lu Zhizheng using crawler dozer, and low pave of trackside is paved, and then uses level land
Machine essence is flat；
S6: water content control, fill during use sprinkle water mode with the water content to optimum moisture content of additional fillers near；
S7: rolling, first using 8 ~ 10 tons twice of dual-steel wheel road roller static pressure, it is low with 14 ~ 24 xanthan wheel vibratory rollers after pressure stabilizing
Frequently high arc vibration rolls, and last static pressure receives face；
S8: closedtop layer fills, sand-filled subgrade closedtop layer use cement stabilizing fine sand, 50 centimetres of thickness, cement mixing content 3%；
S9: detection, sand-filled subgrade bury sedimentation plate and displacement observation stake in feature section as required respectively, carry out the heavy of sand road base
Drop and displacement observation, sedimentation and displacement observation data are supplied to designer in time, are dived by software for calculation to sand-filled subgrade
It is analyzed in sliding surface condition, safety coefficient and the deformation expection of operation phase.
2. the physically improved roadbed filling method of fine silt according to claim 1, it is characterised in that: sand pocket is wide after encapsulation
Degree is not less than 60 centimetres, and compacted thickness is not less than 20 centimetres after accumbency.
3. the physically improved roadbed filling method of fine silt according to claim 1, it is characterised in that: land clearing in S1
Depth be not less than 20 centimetres, jolt ramming is flattened and rolled to ground after the completion of land clearing step, ground compactness is not less than
90%。
4. the physically improved roadbed filling method of fine silt according to claim 1, it is characterised in that: filled out in S5 for layering
Material, every layer of loose laying depth control is less than or equal to 30 centimetres when filler.
5. the physically improved roadbed filling method of fine silt according to claim 1, it is characterised in that: water content is answered in S6
It is supplemented to and is greater than optimum moisture content, and control within the optimum moisture content greater than 2%.
6. the physically improved roadbed filling method of fine silt according to claim 1, it is characterised in that: bound edge soil is filled out in S3
Lime is added in bound edge soil when building, is improved with the performance to bound edge soil.
7. the physically improved roadbed filling method of fine silt according to claim 1, it is characterised in that: pass through rubber tire in S7
It is rolled when vibratory roller rolls at least 36 times.
8. the physically improved roadbed filling method of fine silt according to claim 1, it is characterised in that: sand pocket uses in S4
Geotextiles are made.
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| CN201811595515.5A CN109610244A (en) | 2018-12-25 | 2018-12-25 | The physically improved roadbed filling method of fine silt |
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| CN201811595515.5A CN109610244A (en) | 2018-12-25 | 2018-12-25 | The physically improved roadbed filling method of fine silt |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030640A (en) * | 2020-08-26 | 2020-12-04 | 上海交通大学 | Construction method for filling sandy soil subgrade |
| CN112195699A (en) * | 2020-09-15 | 2021-01-08 | 中电建十一局工程有限公司 | High-groundwater-level silty roadbed filling technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030640A (en) * | 2020-08-26 | 2020-12-04 | 上海交通大学 | Construction method for filling sandy soil subgrade |
| CN112195699A (en) * | 2020-09-15 | 2021-01-08 | 中电建十一局工程有限公司 | High-groundwater-level silty roadbed filling technology |
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