CN205529737U - Water proof roadbed structure - Google Patents
Water proof roadbed structure Download PDFInfo
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- CN205529737U CN205529737U CN201620180999.7U CN201620180999U CN205529737U CN 205529737 U CN205529737 U CN 205529737U CN 201620180999 U CN201620180999 U CN 201620180999U CN 205529737 U CN205529737 U CN 205529737U
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Abstract
The utility model provides a water proof roadbed structure, this water proof roadbed structure includes: the basement of black cotton regur soil road bed, be located the basement both sides, and with the first water barrier of two at least departments that the basement links to each other, be located the basement top, and with the second septum water layer that two at least departments first water barrier top laminating set up. Adopt the utility model provides a road bed water proof structure, the black cotton regur soil that can block in atmosphere and the road bed basement carries out the aqueous vapor exchange, and the black cotton regur soil in the basement of assurance road bed does not receive the influence of atmosphere rainfall and evaporation for the water content of the black cotton regur soil in the road bed basement remains stable, thereby has guaranteed the stability of road bed.
Description
Technical field
This utility model relates to highway construction field, particularly relates to a kind of water proof road structure.
Background technology
Black cotton regur soil is widely distributed at East Africa, be a kind of in geological process formed many cracks and have
The special soils of notable swell-shrink characteristics, composition is based on montmorillonite or montmorillonite/illite vermiculite, and contains
A small amount of kaolinite, galapectite.What change of moisture content was violent affects the engineering characteristic of black cotton regur soil, in water content
In the case of keeping stablizing, black cotton regur soil has preferable strength and stability.Along with atmospheric precipitation and evaporation,
Black cotton regur soil shows the characteristic of repeated expansion and shrinkage, owing to black cotton regur soil has less infiltration coefficient so that roadbed goes out
Existing inhomogeneous deformation, further results in that pavement structure is cracking or fracture.
During atmospheric precipitation, black cotton regur soil roadbed side slope outside can violent water suction and expand deformation, internal because of
Do not have the infiltration of water not deform, therefore form the inhomogeneous deformation of roadbed and cause the road of pavement structure
Shoulder tilts, and time serious, pavement structure can form longitudinal cracking.During evaporation, outside black cotton regur soil roadbed side slope due to
Dehydration and shrink, and the internal soil body of roadbed does not deforms, thus cause arch upward in the middle part of pavement structure and
Coming to nothing in formation base, fracture disease in road surface occurs under the effect of traffic load.Therefore under natural conditions
Black cotton regur soil is not suitable for as roadbed filling, typically with the side's of abandoning process, the most not only causes huge economic damage
Lose, but also cause soil erosion.
In prior art, the punishment mode of black cotton regur soil roadbed is changed based on ground and is filled out, predominantly Change and fill groundsill table
Face about 1m black cotton regur soil is unexpansive soil, gravelly soil or all kinds of inorganic binder punishment soil.Change filled out black
Cotton soil cannot function as roadbed filling and uses, and only as the side's of abandoning process, so will result in huge waste,
And along with soil erosion problem.It addition, replacement thickness is limited, generally 1m, and black cotton regur soil area is big
Gas influence depth is generally 3-4m, atmospheric precipitation and evaporation and still influences whether the black cotton of below replacement thickness
Soil, thus cause handle measure to lose efficacy.
The another kind of Treatment Methods of black cotton regur soil roadbed is embankment bound edge, and its basic ideas are with black cotton regur soil as embankment
Filling out core, embankment is outside uses the unexpansive soil of 3-4m or gravelly soil to carry out bound edge, and achieves certain effect,
But the application of this method is subject to certain restrictions, only limits and use in high embankment.
Utility model content
In view of the above problems, it is proposed that this utility model is to provide one to overcome the problems referred to above or at least portion
Ground is divided to solve the water proof road structure of the problems referred to above.
Based on an aspect of the present utility model, it is provided that a kind of water proof road structure, including:
Black cotton regur soil roadbed substrate；
It is positioned at described substrate both sides and at least two place's the first water barriers being connected with described substrate；
Be positioned at described base top and with described at least two the first water barrier tops, place laminating arrange second every
Water layer.
Alternatively, described at least two place's the first water barriers are by the groove being laid on described substrate both sides excavation
The graded broken stone composition of anti-seepage geotextile and backfill.
Alternatively, the California bearing ratio of the graded broken stone in described at least two place's the first water barriers is more than 15%.
Alternatively, the width of described groove is 300mm, and the degree of depth is 2500mm.
Alternatively, the thickness >=2.5mm of the material of described anti-seepage geotextile, ultimate strength >=17.5kN/m,
Elongation at break is 40～80%, California bearing ratio bursting strength >=3.0kN, tearing brute force >=0.49kN/m.
Alternatively, described second water barrier is made up of graded broken stone.
Alternatively, the maximum particle diameter of the graded broken stone in described second water barrier is not more than 31.5mm, and adopts
Use continuous grading structure.
Alternatively, the California bearing ratio of the graded broken stone in described second water barrier is more than 15%, and compactness is not
Less than 98%.
Alternatively, the thickness of described second water barrier is 300mm.
The water proof road structure that this utility model embodiment provides, arranges first in black cotton regur soil roadbed substrate both sides
Water barrier, arranges the second water barrier in black cotton regur soil roadbed base top.Wherein, the first water barrier blocks roadbed
The water seepage flow of periphery is in the range of roadbed, and the second water barrier blocks subsoil water and rises on pavement structure or road surface
Water penetrate into inside roadbed.By the first water barrier arranged and the second water barrier, air and road are blocked
Black cotton regur soil in base substrate carries out water_air exchange, it is ensured that the black cotton regur soil in roadbed substrate is not by atmospheric precipitation and steaming
The impact sent out so that the water content of the black cotton regur soil in roadbed substrate keeps stable, thus ensure that the steady of roadbed
It is qualitative, it is to avoid owing to the black cotton regur soil generation imbibition in roadbed substrate or dehydration shrinkage cause roadbed to occur
The problem of inhomogeneous deformation, so it also avoid the pavement cracking caused because of roadbed inhomogeneous deformation or
The problem of fracture.It addition, the water proof road structure that this utility model embodiment provides, black cotton regur soil can conduct
Roadbed filling, it is to avoid the changing of black cotton regur soil of road bed fills out punishment, reduces construction costs, beneficially water and soil
Keep, alleviate ambient pressure.
Described above is only the general introduction of technical solutions of the utility model, in order to it is new to better understand this practicality
The technological means of type, and can being practiced according to the content of description, and in order to allow of the present utility model on
State and can become apparent with other objects, features and advantages, be embodied as especially exemplified by of the present utility model below
Mode.
According to below in conjunction with the accompanying drawing detailed description to this utility model specific embodiment, those skilled in the art
Will become more apparent from of the present utility model above-mentioned and other purposes, advantage and feature.
Accompanying drawing explanation
By reading the detailed description of hereafter preferred implementation, various other advantage and benefit for ability
Territory those of ordinary skill will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation, and also
It is not considered as restriction of the present utility model.And in whole accompanying drawing, it is denoted by the same reference numerals phase
Same parts.In the accompanying drawings:
Fig. 1 shows the sectional drawing of the water proof road structure according to one embodiment of this utility model；
It is black that Fig. 2 shows at the 6 kinds of different depths of black cotton regur soil roadbed according to one embodiment of this utility model
The change schematic diagram of cotton soil water content；
Fig. 3 shows the CBR that 3 kinds of different grading types according to one embodiment of this utility model are corresponding
The CBR test result figure of test block；
Fig. 4 shows the different maximum grating class controlling particle diameter of 4 kinds according to one embodiment of this utility model
The CBR test result figure of type；
Fig. 5 shows bulking amount and the black cotton regur soil road of the black cotton regur soil roadbed according to one embodiment of this utility model
The relation schematic diagram of base substrate compacting moisture content；
Fig. 6 shows and utilizes equivalent displacement method calculated rigidity layer of compensation according to one embodiment of this utility model
The schematic diagram of thickness；And
Fig. 7 shows the signal of the construction procedure of the water proof road structure according to one embodiment of this utility model
Figure.
Detailed description of the invention
It is more fully described the exemplary embodiment of the disclosure below with reference to accompanying drawings.Although it is aobvious in accompanying drawing
Show the exemplary embodiment of the disclosure, it being understood, however, that may be realized in various forms the disclosure
And should not limited by embodiments set forth here.On the contrary, it is provided that these embodiments are able to more
Thoroughly understand the disclosure, and can be by the technology conveying to this area complete for the scope of the present disclosure
Personnel.
For solving above-mentioned technical problem, this utility model embodiment provides a kind of water proof road structure.Fig. 1
Show the sectional drawing of water proof road structure according to one embodiment of this utility model.See Fig. 1, should be every
Water route based structures includes:
Black cotton regur soil roadbed substrate 11；
It is positioned at roadbed substrate 11 both sides and at least two place's the first water barriers 12 being connected with roadbed substrate 11；
Be positioned at roadbed substrate 11 top and with at least two the first water barrier 12 tops, place laminating arrange second
Water barrier 13.
The water proof road structure that this utility model embodiment provides, arranges first in black cotton regur soil roadbed substrate both sides
Water barrier, arranges the second water barrier in black cotton regur soil roadbed base top.Wherein, the first water barrier blocks roadbed
The water seepage flow of periphery is in the range of roadbed, and the second water barrier blocks subsoil water and rises on pavement structure or road surface
Water penetrate into inside roadbed.By the first water barrier arranged and the second water barrier, air and road are blocked
Black cotton regur soil in base substrate carries out water_air exchange, it is ensured that the black cotton regur soil in roadbed substrate is not by atmospheric precipitation and steaming
The impact sent out so that the water content of the black cotton regur soil in roadbed substrate keeps stable, thus ensure that the steady of roadbed
It is qualitative, it is to avoid owing to the black cotton regur soil generation imbibition in roadbed substrate or dehydration shrinkage cause roadbed to occur
The problem of inhomogeneous deformation, so it also avoid the pavement cracking caused because of roadbed inhomogeneous deformation or
The problem of fracture.It addition, the water proof road structure that this utility model embodiment provides, black cotton regur soil can conduct
Roadbed filling, it is to avoid the changing of black cotton regur soil of road bed fills out punishment, reduces construction costs, beneficially water and soil
Keep, alleviate ambient pressure.
In a preferred embodiment of the present utility model, seeing Fig. 1, the first water barrier 12 at least includes:
The anti-seepage geotextile 121 laid along the trench wall of roadbed substrate both sides excavation, and backfill in groove
Graded broken stone 122.
Anti-seepage geotextile has that intensity is high, coefficient of friction big, the feature of puncture-resistant, therefore, it is possible to strengthen by
The tensile strength of the graded broken stone that anti-seepage geotextile surrounds and non-deformability, further enhance road structure
Stability.In a preferred embodiment of the present utility model, the material requirements of anti-seepage geotextile at least includes:
In a preferred embodiment of the present utility model, the California bearing ratio of the graded broken stone of backfill in groove
More than 15%.Wherein, California bearing ratio (California bearing ratio is called for short CBR) is a kind of
The test method of evaluation base material bearing capacity, bearing capacity is with material opposing Local Loads press-in deformation
Ability characterizes, and to use the bearing capacity of standard rubble be standard, represents with the percent of relative value
CBR value.
The factor of the degree of depth affecting the groove along roadbed substrate both sides excavation is mainly atmospheric factor.In order to determine
The climate influenced layer of black cotton regur soil roadbed, in this utility model embodiment, by finite element software (such as,
ABAQUS) numerical model is set up, black cotton at black cotton regur soil roadbed different depth under analysis rainfall, evaporation conditions
Soil water content is over time.This utility model embodiment with the black cotton regur soil roadbed degree of depth as 0m, 0.5m,
Black cotton regur soil at 1.5m, 2.5m, 3.5m and 4.5m is as measuring object, at 6 kinds of different depths
The water content of black cotton regur soil measures.Fig. 2 shows the black cotton regur soil road according to one embodiment of this utility model
The change schematic diagram of the black cotton regur soil water content at 6 kinds of different depths of base, wherein, the axis of abscissas in schematic diagram
Representing the time, axis of ordinates represents the water content (%) of black cotton regur soil.See Fig. 2, respectively by 6 kinds of differences
Label symbol formed 6 different curves, these 6 curves represent respectively the black cotton regur soil roadbed degree of depth be 0.0m,
The change schematic diagram of the water content of the black cotton regur soil at 0.5m, 1.5m, 2.5m, 3.5m and 4.5m.From figure
Drawing in 2, the black cotton regur soil roadbed degree of depth is that the water content of the black cotton regur soil at 0m, 0.5m, 1.5m, 2.5m is subject to
Atmospheric precipitation, evaporation factor obvious, and the black cotton regur soil below black cotton regur soil roadbed degree of depth 2.5m is basic
Do not evaporated by rainfall and affected, hence, it can be determined that the black cotton regur soil degree of depth being affected by atmospheric effects in black cotton regur soil roadbed
For 2.5m, as long as the water content of the black cotton regur soil in black cotton regur soil roadbed degree of depth 2.5m keeps stable, not by air
Rainfall and the impact of evaporation, and then avoid due to the black cotton regur soil generation imbibition in roadbed substrate or dehydration
Shrink and cause roadbed that the problem of inhomogeneous deformation occurs, and then it also avoid because roadbed inhomogeneous deformation causes
Pavement cracking or the problem of fracture.Therefore, in a preferred embodiment of the present utility model, edge
The gash depth of roadbed substrate both sides excavation is 2.5m, and width is 0.3m.
In a preferred embodiment of the present utility model, seeing Fig. 1, the second water barrier is by graded broken stone 131
Composition.
The bearing capacity of graded broken stone is affected relatively big by the difference of level distribution structure, in this utility model embodiment,
Maximum with 31.5mm as graded broken stone controls particle diameter, list 3 kinds of different gradation types A31.5 thin,
In A31.5, A31.5 thick, see table 1.Wherein, the square hole screen using 13 kinds of different sizes is broken to grating
The gradation types of stone makes a distinction, specifically, with the quality of the graded broken stone of the square hole screen by same specification
The gradation types of graded broken stone, as standard, is made a distinction by percentage ratio, such as, a diameter of by square hole
The mass percent of 3 kinds of different types of graded broken stones of the square hole screen of 4.75mm is 54%, 44%, 31%,
Wherein, by the graded broken stone that the mass percent of same specification square hole screen is the highest, corresponding type is thin level
Join type.This utility model embodiment only illustrates as a example by the square hole screen of a diameter of 4.75mm of square hole,
In practical operation, the percent mass of the square hole screen by multiple specifications should be used to be used for the criteria for classifying.
Table 1
In this utility model embodiment, use the CBR that 3 kinds of different grading types of Beat numbers method molding are corresponding
Test block, and 3 kinds of CBR test blocks are carried out CBR testing experiment.Fig. 3 shows according to this practicality new
The CBR test result figure of the CBR test block that 3 kinds of different grading types of one embodiment of type are corresponding,
Wherein, vertical coordinate represents CBR value.Drawn by Fig. 3, A31.5 is thick, in A31.5, A31.5 thin by 3
Planting CBR value corresponding to gradation types and be respectively 110%, 185%, 50%, gradation types is in A31.5
There is higher bearing capacity.
In this utility model embodiment, tested by CBR and also analyze the different maximum grating controlling particle diameter
The bearing capacity of type.Fig. 4 shows the different maximum control of 4 kinds according to an embodiment of the present utility model
The CBR test result figure of the gradation types in granulation footpath, wherein, axis of abscissas represents maximum control particle diameter
Grain size (unit: mm), axis of ordinates represents CBR value.Drawn by Fig. 4, maximum control grain
The grain size in footpath is the biggest, and CBR value is the biggest.But the grain size of maximum control particle diameter is the biggest, to grating
The construction compacting operation of rubble is the most difficult.
In conjunction with above-mentioned twice CBR result of the test and construction compacting operation, of the present utility model one preferably
In embodiment, the maximum particle diameter that controls of the graded broken stone forming the second water barrier is not more than 31.5mm, and adopts
Using continuous grading structure, the California bearing ratio of graded broken stone is more than 15%, and compactness is not less than 98%.Tool
Body ground, optional gradation types is that the graded broken stone in A31.5 forms the second water barrier.
Require supplementation with explanatorily, before black cotton regur soil roadbed base top lays the second water barrier, permitted black
Cotton earth roadbed substrate carries out being compacted, flattening operation.Wherein, black cotton regur soil roadbed substrate compaction water content is to roadbed
There is certain impact in the stability of structure.
Black cotton regur soil roadbed substrate water content is continually changing under the influence of air agent and subsoil water, repaiies at roadbed
Being up to poised state after building 2-3, according to having studied, the equilibrium moisture content of black cotton regur soil roadbed substrate connects
The plastic limit 23.5% of nearly black cotton regur soil, it can thus be appreciated that the equilibrium moisture content of black cotton regur soil roadbed substrate is 23.5%, its
In, plastic limit refers to that soil is transitioned into limit moisture content during semi-solid state by plastic state.
Fig. 5 shows bulking amount and the black cotton regur soil road of the black cotton regur soil roadbed according to one embodiment of this utility model
The relation schematic diagram of base substrate compacting moisture content, wherein, axis of abscissas represents black cotton regur soil substrate compacting moisture content,
Axis of ordinates represents the bulking amount (unit: cm) of black cotton regur soil roadbed.Drawn by Fig. 5, black cotton regur soil roadbed
Bulking amount reduces along with the increase of black cotton regur soil roadbed substrate compacting moisture content, is compacted in black cotton regur soil roadbed substrate
When moisture content is 16%, bulking amount when black cotton regur soil roadbed reaches equilibrium moisture content state is up to 5.5cm；
When black cotton regur soil subgrade compaction moisture content is equal to equilibrium moisture content, the bulking amount of black cotton regur soil roadbed is 0.If it is black
Cotton earth roadbed compacting moisture content is less than equilibrium moisture content, along with the increasing of the black cotton regur soil moisture content in black cotton regur soil roadbed
Adding, black cotton regur soil imbibition will cause roadbed constantly to swell, and roadbed and pavement structure can be produced certain destruction.
Therefore, in a preferred embodiment of the present utility model, the compacting moisture content of black cotton regur soil roadbed substrate is black
The equilibrium moisture content 23.5% of cotton soil.
When the compacting moisture content of black cotton regur soil roadbed substrate uses the equilibrium moisture content of black cotton regur soil, black cotton regur soil roadbed base
The modulus of resilience at the end only has 30MPa, and the modulus of resilience that can not meet far away roadbed substrate is wanting of 80MPa
Ask, wherein, the modulus of resilience refer to stress that roadbed, road surface and road-making material produce under load action and its
The ratio of corresponding resilience strain.Accordingly, it would be desirable to it is certain thickness just in the laying of black cotton regur soil roadbed base top
Degree layer of compensation.In this utility model embodiment, the second water barrier is as rigidity compensation layer.
The earth roadbed Double-layer elastic system that is considered as of black cotton regur soil of rigidity compensation layer by making, and set rigidity compensation layer
The modulus of resilience be E1, thickness is h, is E2 by the modulus of resilience of black cotton regur soil roadbed substrate, then in rigidity
Under the Action of Vertical Loads of loading plate, available Double-layer elastic theory calculates to obtain the vertical deformation of black cotton regur soil road bed
L, determines the thickness of rigidity compensation layer by equivalent displacement method.Fig. 6 shows according to this utility model one
The schematic diagram utilizing equivalent displacement method calculated rigidity layer of compensation thickness of embodiment.Wherein, left side in Fig. 6
The axis of abscissas of the curve chart divided represents the thickness (unit: cm) of rigidity compensation layer, and axis of ordinates represents black
The vertical deformation amount (unit: 0.01mm) on cotton earth roadbed surface, the curve chart of right half part in Fig. 6
Axis of abscissas represents the modulus of resilience (unit: MPa) of black cotton regur soil roadbed, and axis of ordinates represents black cotton regur soil road
The vertical deformation amount (unit: 0.01mm) of primary surface.Found out by the curve chart of right half part in Fig. 6,
It is the requirement of 80MPa to meet the black cotton regur soil roadbed substrate modulus of resilience, the carrying of black cotton regur soil road bed
Maximum perpendicular is deformed into 258.4 (0.01mm), and the modulus of resilience of black cotton regur soil roadbed substrate is 30MPa, presses
Displacement equivalence principle, is intended to improve to 80MPa the modulus of resilience of black cotton regur soil roadbed substrate, a left side half from Fig. 5
The curve chart of part drawing, the thickness of rigidity compensation layer is 30cm.Therefore, at one of the present utility model
In preferred embodiment, the thickness of the second water barrier is 30cm.
The water proof road structure that this utility model provides is further illustrated below with a specific embodiment.
Fig. 7 shows the signal of the construction procedure of the water proof road structure according to one embodiment of this utility model
Figure.Seeing Fig. 7, the construction procedure of water proof road structure at least includes that step 701 is to step 704.
Step 701, excavates the deep black cotton regur soil of 300mm in the range of roadbed, is compacted, flattens black cotton regur soil roadbed base
The end, and the compacting moisture content of black cotton regur soil roadbed substrate is 23.5%, opens at the curb of black cotton regur soil roadbed both sides
Digging groove, ditch groove width 300mm, deep 2500mm, and clear up surface dust in ditch；
Step 702, lays 300mm thickness graded broken stone, forms second at the top of black cotton regur soil roadbed substrate
Water barrier, wherein, the maximum particle diameter that controls of the graded broken stone forming the second water barrier is not more than 31.5mm,
And using continuous grading structure, the California bearing ratio of graded broken stone is more than 15%, and compactness is not less than 98%.
Step 703, in setting anti-seepage geotextile, and groove along inwall in groove, backfill graded broken stone is to road
Ji Shangbiaomianchu, forms the first water barrier, then fills lean concrete in the first water barrier to bottom road surface.
Step 704, making asphalt pavement structure on water proof roadbed.
In sum, the water proof road structure using this utility model to provide, can reach following beneficial effect:
The water proof road structure that this utility model embodiment provides, arranges first in black cotton regur soil roadbed substrate both sides
Water barrier, arranges the second water barrier in black cotton regur soil roadbed base top.Wherein, the first water barrier blocks roadbed
The water seepage flow of periphery is in the range of roadbed, and the second water barrier blocks subsoil water and rises on pavement structure or road surface
Water penetrate into inside roadbed.By the first water barrier arranged and the second water barrier, air and road are blocked
Black cotton regur soil in base substrate carries out water_air exchange, it is ensured that the black cotton regur soil in roadbed substrate is not by atmospheric precipitation and steaming
The impact sent out so that the water content of the black cotton regur soil in roadbed substrate keeps stable, thus ensure that the steady of roadbed
It is qualitative, it is to avoid owing to the black cotton regur soil generation imbibition in roadbed substrate or dehydration shrinkage cause roadbed to occur
The problem of inhomogeneous deformation, so it also avoid the pavement cracking caused because of roadbed inhomogeneous deformation or
The problem of fracture.It addition, the water proof road structure that this utility model embodiment provides, black cotton regur soil can conduct
Roadbed filling, it is to avoid the changing of black cotton regur soil of road bed fills out punishment, reduces construction costs, beneficially water and soil
Keep, alleviate ambient pressure.
In description mentioned herein, illustrate a large amount of detail.It is to be appreciated, however, that this reality
Can put into practice in the case of there is no these details by novel embodiment.In some instances, not
It is shown specifically known method, structure and technology, in order to do not obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify the disclosure and help to understand in each utility model aspect
Individual or multiple, in description to exemplary embodiment of the present utility model above, of the present utility model each
Feature is grouped together in single embodiment, figure or descriptions thereof sometimes.But, should be by
The method of the disclosure is construed to reflect an intention that this utility model the most required for protection requires that ratio is each
The more feature of feature being expressly recited in claim.More precisely, as the following claims
As being reflected, utility model aspect is all features less than single embodiment disclosed above.Cause
This, it then follows claims of detailed description of the invention are thus expressly incorporated in this detailed description of the invention, the most often
Individual claim itself is all as independent embodiment of the present utility model.
Those skilled in the art are appreciated that and can carry out adaptive to the module in the equipment in embodiment
Change to answering property and they are arranged in one or more equipment different from this embodiment.Can be reality
Execute the module in example or unit or assembly is combined into a module or unit or assembly, and in addition can be it
Be divided into multiple submodule or subelement or sub-component.Except in such feature and/or process or unit
Outside at least some excludes each other, can use any combination that (this specification being included, adjoint right is wanted
Ask, make a summary and accompanying drawing) disclosed in all features and so disclosed any method or equipment all
Process or unit are combined.Unless expressly stated otherwise, this specification (include adjoint claim,
Summary and accompanying drawing) disclosed in each feature can by provide identical, equivalent or the alternative features of similar purpose
Replace.
Although additionally, it will be appreciated by those of skill in the art that embodiments more described herein include other
Some feature included in embodiment rather than further feature, but the combination meaning of the feature of different embodiment
Taste and is within the scope of this utility model and forms different embodiments.Such as, at claims
In, one of arbitrarily can mode using in any combination of embodiment required for protection.
It should be noted that this utility model is illustrated rather than to enter this utility model by above-described embodiment
Row limits, and those skilled in the art can design without departing from the scope of the appended claims
Alternative embodiment.In the claims, any reference marks that should not will be located between bracket is configured to power
The restriction that profit requires.Word " comprises " and does not excludes the presence of the element or step not arranged in the claims.Position
Word "a" or "an" before element does not excludes the presence of multiple such element.Word first,
Second and third use do not indicate that any order.Can be title by these word explanations.
So far, although those skilled in the art will appreciate that the most detailed to illustrate and describe this practicality new
Multiple exemplary embodiments of type, but, in the case of without departing from this utility model spirit and scope, still
Can directly determine according to this utility model disclosure or derive the many meeting this utility model principle
Other variations or modifications.Therefore, scope of the present utility model is it is understood that and regard as covering all these
Other variations or modifications.
Claims (9)
1. a water proof road structure, it is characterised in that including:
Black cotton regur soil roadbed substrate；
It is positioned at described substrate both sides and at least two place's the first water barriers being connected with described substrate；
Be positioned at described base top and with described at least two the first water barrier tops, place laminating arrange second every
Water layer.
Road structure the most according to claim 1, it is characterised in that described at least two place's the first water proofs
Layer is made up of the graded broken stone of the anti-seepage geotextile in the groove being laid on described substrate both sides excavation and backfill.
Road structure the most according to claim 2, it is characterised in that described at least two place's the first water proofs
The California bearing ratio of the graded broken stone in Ceng is more than 15%.
4. according to the road structure described in Claims 2 or 3, it is characterised in that the width of described groove is
300mm, the degree of depth is 2500mm.
5. according to the road structure described in Claims 2 or 3, it is characterised in that described anti-seepage geotextile
Thickness >=2.5mm, the ultimate strength >=17.5kN/m of material, elongation at break is 40～80%, California
Carrying ratio bursting strength >=3.0kN, tearing brute force >=0.49kN/m.
Road structure the most according to claim 1, it is characterised in that described second water barrier is by grating
Rubble forms.
Road structure the most according to claim 6, it is characterised in that the level in described second water barrier
The maximum particle diameter joining rubble is not more than 31.5mm, and uses continuous grading structure.
8. according to the road structure described in claim 6 or 7, it is characterised in that in described second water barrier
The California bearing ratio of graded broken stone more than 15%, compactness is not less than 98%.
9. according to the road structure described in claim 6 or 7, it is characterised in that described second water barrier
Thickness is 300mm.
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| CN201620180999.7U CN205529737U (en) | 2016-03-09 | 2016-03-09 | Water proof roadbed structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672076A (en) * | 2016-03-09 | 2016-06-15 | 中国路桥工程有限责任公司 | Water insulation roadbed structure |
-
2016
- 2016-03-09 CN CN201620180999.7U patent/CN205529737U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672076A (en) * | 2016-03-09 | 2016-06-15 | 中国路桥工程有限责任公司 | Water insulation roadbed structure |
| CN105672076B (en) * | 2016-03-09 | 2018-05-25 | 中国路桥工程有限责任公司 | A kind of water proof road structure |
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