CN209368605U - A kind of combined type highway subgrade structure - Google Patents
A kind of combined type highway subgrade structure Download PDFInfo
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- CN209368605U CN209368605U CN201821988998.0U CN201821988998U CN209368605U CN 209368605 U CN209368605 U CN 209368605U CN 201821988998 U CN201821988998 U CN 201821988998U CN 209368605 U CN209368605 U CN 209368605U
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- reinforcing layer
- swelled ground
- highway subgrade
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Abstract
The utility model discloses a kind of combined type highway subgrade structures, the highway subgrade structure includes that the swelled ground set gradually from bottom to top fills layer, crushed rock filler transition zone, reinforcing layer and unexpansive soil and fills layer, the reinforcing layer is made of lower reinforcing layer and upper reinforcing layer, and the lower reinforcing layer and the upper reinforcing layer are made of TGXG and the filler making above the TGXG.The utility model has the advantages that: by filling in swelled ground, transition zone is set between layer and reinforcing layer, substantially reduce the pulling force that swelled ground is subject to TGXG in expansion process, pavement cracking and breakage can be prevented when differential expansion occurs for swelled ground, and swelled ground can be effectively prevent to expand the top that reinforcing layer is arranged in geomembrane causes geomembrane to be torn, so that this patent had both efficiently solved the problems, such as that a large amount of dilatancy dregs were stacked difficult in engineering, also filling roadbed fill source, environmental benefit and remarkable in economical benefits are solved the problems, such as.
Description
Technical field
The utility model relates to highway engineering technical fields, and in particular to a kind of combined type highway subgrade structure.
Background technique
China is man, a Ge Duo mountain country, therefore, in order to ensure the ride comfort of route during high-grade highway is built, no
Avoidable ground will face the engineering of a large amount of dregs of the generations such as deep desulphurization, tunnel, while when carrying out route design, often in depth
The joining sections design such as digging cutting, tunnel is filling roadbed, and such design is both to consume deep desulphurization or constructing tunnel process
The a large amount of dregs generated, while being also used for solving the problems, such as filling roadbed fill source, and in route design, it generally can be as far as possible
Take into account the relation between supply and demand between dregs and filler.
But after the dregs generated during many deep desulphurizations, constructing tunnel is exposed to conventional environment, when certain
It is interior to generate volume expansion, it is commonly called as satisfying the need for expansive rock (soil) when this kind of soil is directly used as the filling material of roadbed ontology
The stability of base, Track regularity have a certain impact, and likely result in road structure occur it is outer squeeze, pavement cracking with
Breakage even will affect the service life of highway pavement when serious.Therefore, in existing construction, often due to expansive rock is to filling out
Build the road base and road surface destructiveness and have to abandon the utilization to expansive rock, therefore not only need to solve deep desulphurization or tunnel
The dregs that construction generates stacks problem, while it is native also to solve the problems, such as that filling roadbed filler takes, and dregs stacks the digging with filler
It draws environment and causes very big influence and even seriously destroy, while also adding project cost.
In previous research, in order to utilize swelled ground, proposes using the method for Fill Reinforced With Geogrids and limit because swollen
The expansion of swollen soil and lead to subgrade deformation, but since the dilatancy of swelled ground is strong, be likely to occur geotechnique in practical applications
The case where grid is pulled off；And when top is laid with geomembrane, the frictional force between geomembrane and soil layer is limited, to limitation roadbed
The effect of deformation is little, it is also possible to cause geomembrane to be torn under the expansion of swelled ground.Therefore, how road will be deep-cut
Filling roadbed filler is made in a large amount of dilatancy dregs applications generated during moat, constructing tunnel, is a pass urgently to be solved
Key problem.
Summary of the invention
The purpose of this utility model is to provide a kind of combined type highway subgrade according in place of above-mentioned the deficiencies in the prior art
Structure, the highway subgrade structure is by filling setting crushed rock filler transition zone between layer and reinforcing layer in swelled ground, thus significantly
The pulling force that swelled ground TGXG in expansion process is subject to is reduced, while when differential expansion occurs for swelled ground, rubble
Filler transition zone plays adjustment effect, prevents road surface from cracking and breakage occurs, and the top that reinforcing layer is arranged in geomembrane can
It effectively prevent causing geomembrane to be torn when expansion soil expansion.
The utility model aim realization is completed by following technical scheme:
A kind of highway subgrade structure that swelled ground fills, it is characterised in that the highway subgrade structure include from bottom to top according to
The swelled ground of secondary setting fills layer, crushed rock filler transition zone, reinforcing layer and unexpansive soil and fills layer, and the reinforcing layer is added by lower
Muscle layer and upper reinforcing layer composition, the lower reinforcing layer and the upper reinforcing layer by TGXG and are located at the TGXG
The filler making of top is constituted.
The swelled ground fills the ratio between thickness and its bottom width of layer no more than 1:2；The swelled ground fills the side of layer
The angle of slope side and horizontal plane is not more than 45 °.
The swelled ground fills layer and is formed by swelled ground making, and the maximum particle diameter of the swelled ground is not more than 250mm.
The crushed rock filler transition zone is formed by crushed rock filler making, and the maximum particle diameter of the crushed rock filler is not more than
40mm。
The loose laying depth of the crushed rock filler transition zone is 15-20cm.
It is identical along the thickness of roadbed transverse direction that the swelled ground fills layer；Thickness along roadbed longitudinal direction is in consecutive variations, thick
It spends change rate and is not more than 0.1m/m.
The loose laying depth of filler described in the lower reinforcing layer is 25-35cm, the pine of filler described in the upper reinforcing layer
Paving is with a thickness of 35-45cm.
The TGXG is laterally laid with along roadbed, and the overlap joint between the longitudinally adjacent TGXG of roadbed is wide
Degree is 10-15cm.
The upper surface of the reinforcing layer is equipped with a geomembrane.
The reinforcing layer and the unexpansive soil fill the overall thickness of layer not less than 1.5m.
The utility model has the advantages that: by filling setting crushed rock filler transition zone between layer and reinforcing layer in swelled ground,
The pulling force that swelled ground is subject to TGXG in expansion process is substantially reduced, while differential expansion occurs in swelled ground
When, crushed rock filler transition zone plays adjustment effect, prevents road surface from cracking and breakage occurs, and reinforcing layer is arranged in geomembrane
Top, which can effectively prevent swelled ground to expand, causes geomembrane to be torn, so that this patent had both efficiently solved in engineering largely
Dilatancy dregs stacks difficult problem, also solves the problems, such as filling roadbed fill source, environmental benefit and economic benefit
Significantly.
Detailed description of the invention
Fig. 1 is the longitudinal profile schematic diagram of combined type highway subgrade structure in the utility model；
Fig. 2 is the enlarged diagram in the utility model Fig. 1 at A.
Specific embodiment
The feature of the utility model and other correlated characteristics are made further specifically by embodiment below in conjunction with attached drawing
It is bright, in order to the understanding of technical staff of the same trade:
Such as Fig. 1-2,1-8 is respectively as follows: ground 1 to label, swelled ground fills layer 2, transition zone 3, reinforcing layer 4, lower reinforcement in figure
Layer 4a, upper reinforcing layer 4b, TGXG 5, geomembrane 6, unexpansive soil fill layer 7, filler 8.
Embodiment: as shown in Figs. 1-2, the present embodiment is specifically related to a kind of combined type highway subgrade structure, the road structure
Swelled ground including setting gradually from bottom to top fills layer 2, transition zone 3, reinforcing layer 4 and unexpansive soil and fills layer 7, passes through
It is filled in swelled ground and adds transition zone 3 on layer 2, so that the pulling force that the TGXG 5 in reinforcing layer 4 is subject to greatly reduces, swollen
Swollen soil fill layer 2 occur differential expansion when, transition zone 3 have certain adjustment effect, prevent road surface therefore occur cracking with
Breakage, and be laid with geomembrane 6 at the top of reinforcing layer 4 and geomembrane 6 can be effectively prevent to be inflated soil blister split.
As shown in Figure 1, 2, combined type highway subgrade structure includes being set to setting on ground 1 from bottom to top in the present embodiment
The swelled ground set fills layer 2, transition zone 3, reinforcing layer 4 and unexpansive soil and fills layer 7.Swelled ground fills layer 2 and is arranged in highway
The bottom of roadbed fills the filling material of layer 2 using a large amount of swelled grounds generated during construction of the highway, both as swelled ground
Solve the problems, such as that a large amount of dilatancy dregs are stacked difficult in engineering, also solve the problems, such as filling roadbed fill source.Expansion
The gradation that soil fills the Expansive Soil Filling of layer 2 is good, and particle excessive in swelled ground should be crushed, to ensure its maximum
Partial size is not more than 250mm, and the generation of swelled ground particle diameter distribution non-uniform phenomenon should be avoided when filling, in case swelled ground occurs
When expansion swelled ground fill each section expansion character in layer 2 it is inconsistent and occur rupture or Uneven road.Making swelled ground fills
Layered rolling is carried out using heavy road roller when layer 2, at conventional roadbed location, the thickness that swelled ground fills layer 2 should be each
Condition of equivalent thickness is kept on direction, is needed when due to engineering construction, it is desirable that swelled ground fills the thickness of layer 2 by thick thinning or by thin change
When thick or when swelled ground fills layer 2 and is transitioned into unexpansive soil and fills layer 7, thickness of the thickness in roadbed transverse direction is identical, and
The case where being in consecutive variations on roadbed longitudinal direction, i.e., not may occur in which step Equal variation cataclysm, thickness change is not more than
0.1m/m.Swelled ground fill layer 2 along the section of roadbed transverse direction be it is trapezoidal, the ratio between thickness and bottom width maximum value are no more than 1/
2, and the angle of its side slope side and horizontal plane is not more than 45 degree, it is ensured that its energy with good stability.
As shown in Figure 1, 2, it is transition zone 3 that swelled ground, which fills the top of layer 2, and transition zone 3 is filled out using the small rubble of cohesive strength
Material making forms, and the grain diameter of crushed rock filler is uniform, and maximum particle diameter is not more than 40mm, due to such crushed rock filler cohesive strength
It is small, can effectively adjust its underpart swelled ground fill transverse shear stress that swelled ground in layer 2 generates and it is vertical on it is uneven swollen
It is swollen, it is ensured that the ride comfort on road structure stabilization and road surface.The loose laying depth of 3 medium stone filler of transition zone is controlled in 15-20cm
In range, then rolled again using light-duty road roller.
As shown in Figure 1, 2, the top of transition zone 3 is reinforcing layer 4, and reinforcing layer 4 is by lower reinforcing layer 4a and upper reinforcing layer 4b
Composition, lower reinforcing layer 4a and upper reinforcing layer 4b are made of the filler 10 of TGXG 5 and making on it.Specifically,
It is laterally laid with TGXG 5 along roadbed in the upper surface of transition zone 3, i.e. the longitudinal direction of TGXG 5 should be laterally opposed with roadbed
It answers, on the longitudinal direction of roadbed, the lap width (i.e. the width of lap) between TGXG 5 is 10-15cm, then in geotechnique
Filler 8 is filled on grid 5, the filler of large-size particles can be free of for clay, silty clay etc., to prevent large-size particles broken
TGXG is damaged, loose laying depth controls within the scope of 25-35cm, is then rolled using light-duty road roller, makes its surface
Smoothly, lower reinforcing layer 4a is formed.One layer of TGXG 5 is re-layed according to the laying method of TGXG 5 in lower reinforcing layer 4a, so
Filler 8 is being filled in TGXG 5 afterwards, loose laying depth controls within the scope of 35-45cm, then carries out using heavy road roller
It rolls, makes the smooth sound construction in its surface, reinforcing layer 4b in formation.TGXG 5 has the spy that intensity is high, resistant slide ability is strong
Point effectively enhances the strength and stability of road structure, and due to expansion by the way that lower reinforcing layer 4a and upper reinforcing layer 4b is arranged
Soil fills the top making of layer 2 transition zone 3, and reinforcing layer 4 is filled layer 2 with swelled ground and is separated, swelled ground is effectively prevented and fills out
It builds to break the TGXG 5 in reinforcing layer 4 when Expansive Soil Filling used in layer 2 expands and leads to road structure breakage feelings
The generation of condition.
As shown in Figure 1, 2, the surface of reinforcing layer 4 is equipped with geomembrane 6, and geomembrane 6 is using plastic film as antiseepage base
Material, with it is non-woven fabric compounded made of a kind of seepage by geo-textile material, have specific gravity smaller, extensibility is stronger, and adaptive deformation ability is high,
It is corrosion-resistant, it is low temperature resistant, the advantages of good frost resistance.Geomembrane 6 can form effective antiseepage to road structures such as reinforcing layers 4 and protect
Shield, and since geomembrane 6 is set to the surface of reinforcing layer 4, layer 2 is filled with swelled ground and is separated, and is avoided swelled ground and is filled in layer 2
Swelled ground geomembrane 6 is torn in expansion process.
As shown in Figure 1, 2, the top of geomembrane 6 is that unexpansive soil fills layer 7, and unexpansive soil fills the structure of layer 7 and applies
Work method is referring to conventional roadbed construction method, and details are not described herein.In addition, reinforcing layer 4 and unexpansive soil fill layer 7
Filling-up thickness should be not less than 1.5m, it is ensured that the stabilized soil pavement of road structure.
As shown in Figure 1, 2, in the present embodiment combined type highway subgrade structure construction method the following steps are included:
(1) surface of ground 1 is carried out smooth.
(2) swelled ground fills 2 filling construction of layer: filling the filling material of layer 2 as swelled ground using swelled ground, it is ensured that swollen
Swollen soil filler gradation is good, particle excessive in swelled ground should be crushed, to ensure that its maximum particle diameter is not more than
250mm, and the generation of swelled ground particle diameter distribution non-uniform phenomenon should be avoided when filling, then divided using heavy road roller
Layer rolls.At conventional roadbed location, the thickness that swelled ground fills layer 2 should keep condition of equivalent thickness in all directions, when due to
Engineering construction needs, it is desirable that swelled ground fills the thickness of layer 2 by thick thinning or by when thin thicken or swelled ground fills 2 mistake of layer
It crossing when filling layer 7 to unexpansive soil, thickness of the thickness in roadbed transverse direction is identical, and is in consecutive variations on roadbed longitudinal direction,
The case where not may occur in which step Equal variation cataclysm, thickness change are not more than 0.1m/m.Ensure roadbed filling when construction
The ratio between thickness and bottom width of layer 2 are not more than 1/2, and the angle of its side slope side and horizontal plane is not more than 45 degree, it is ensured that its
Energy with good stability.
(3) 3 filling construction of transition zone: the small crushed rock filler of cohesive strength, uniform particle sizes are filled, it is ensured that its maximum particle diameter is not
Greater than 40mm, loose laying depth is controlled within the scope of 15-20cm, is then rolled again using light-duty road roller.
(4) 4 filling construction of reinforcing layer: being laterally laid with TGXG 5 along roadbed in the upper surface of transition zone 3, i.e., geotechnological lattice
The longitudinal direction of grid 5 should be answered with the laterally opposed of roadbed, lap width (the i.e. overlapping portion on the longitudinal direction of roadbed, between TGXG 5
The width divided) it is 10-15cm, then filler 8 is filled in TGXG 5, loose laying depth controls within the scope of 25-35cm, so
It is rolled afterwards using light-duty road roller, keeps its surface smooth, form lower reinforcing layer 4a.According to TGXG in lower reinforcing layer 4a
5 laying method re-lays one layer of TGXG 5, then fills filler 8 again in TGXG 5, and loose laying depth control exists
Within the scope of 35-45cm, then heavy road roller is used to be rolled, makes the smooth sound construction in its surface, reinforcing layer 4b in formation.
(5) be laid with geomembrane 6: reinforcing layer 4 fill after the completion of its surface be laid with geomembrane 6, to form good antiseepage
Protect structure.
(6) unexpansive soil fills 7 filling construction of layer: the structure and construction method that unexpansive soil fills layer 7 are referring to routine
Roadbed construction method, details are not described herein.
It should be pointed out that the filling-up thickness that reinforcing layer 4 and unexpansive soil fill layer 7 should be not less than 1.5m, to ensure road
The stabilized soil pavement of based structures.
The beneficial effect of the present embodiment is: transition zone being arranged between layer and reinforcing layer by filling in swelled ground, subtracts significantly
The pulling force that small swelled ground is subject to TGXG in expansion process, while when differential expansion occurs for swelled ground, rubble
Filler transition zone plays adjustment effect, prevents road surface from cracking and breakage occurs, and the top that reinforcing layer is arranged in geomembrane can
Effectivelying prevent swelled ground to expand causes geomembrane to be torn, so that this patent had both efficiently solved a large amount of dilatancy in engineering
Dregs stacks difficult problem, also solves the problems, such as filling roadbed fill source, environmental benefit and remarkable in economical benefits.
Claims (10)
1. a kind of combined type highway subgrade structure, it is characterised in that the highway subgrade structure includes setting gradually from bottom to top
Swelled ground fills layer, crushed rock filler transition zone, reinforcing layer and unexpansive soil and fills layer, and the reinforcing layer is by lower reinforcing layer and upper
Reinforcing layer composition, the lower reinforcing layer and the upper reinforcing layer are by TGXG and filling out above the TGXG
Expect that making is constituted.
2. a kind of combined type highway subgrade structure according to claim 1, it is characterised in that the swelled ground fills layer
The ratio between thickness and its bottom width are not more than 1:2；The swelled ground fills the side slope side of layer and the angle of horizontal plane is not more than
45°。
3. a kind of combined type highway subgrade structure according to claim 1, it is characterised in that the swelled ground fill layer by
Swelled ground making forms, and the maximum particle diameter of the swelled ground is not more than 250mm.
4. a kind of combined type highway subgrade structure according to claim 1, it is characterised in that the crushed rock filler transition zone
It is formed by crushed rock filler making, the maximum particle diameter of the crushed rock filler is not more than 40mm.
5. a kind of combined type highway subgrade structure according to claim 1, it is characterised in that the crushed rock filler transition zone
Loose laying depth be 15-20cm.
6. a kind of combined type highway subgrade structure according to claim 1, it is characterised in that the swelled ground fills layer edge
The thickness of roadbed transverse direction is identical；Thickness along roadbed longitudinal direction is in consecutive variations, and thickness change is not more than 0.1m/m.
7. a kind of combined type highway subgrade structure according to claim 1, it is characterised in that described in the lower reinforcing layer
The loose laying depth of filler is 25-35cm, and the loose laying depth of filler described in the upper reinforcing layer is 35-45cm.
8. a kind of combined type highway subgrade structure according to claim 1, it is characterised in that the TGXG is along roadbed
It is laterally laid with, and the lap width between the longitudinally adjacent TGXG of roadbed is 10-15cm.
9. a kind of combined type highway subgrade structure according to claim 1, it is characterised in that the upper surface of the reinforcing layer
It is equipped with a geomembrane.
10. a kind of combined type highway subgrade structure according to claim 1, it is characterised in that the reinforcing layer with it is described non-
Swelled ground fills the overall thickness of layer not less than 1.5m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821988998.0U CN209368605U (en) | 2018-11-29 | 2018-11-29 | A kind of combined type highway subgrade structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821988998.0U CN209368605U (en) | 2018-11-29 | 2018-11-29 | A kind of combined type highway subgrade structure |
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| Publication Number | Publication Date |
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| CN209368605U true CN209368605U (en) | 2019-09-10 |
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ID=67834651
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| CN201821988998.0U Active CN209368605U (en) | 2018-11-29 | 2018-11-29 | A kind of combined type highway subgrade structure |
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2018
- 2018-11-29 CN CN201821988998.0U patent/CN209368605U/en active Active
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