CN107740323A - Semi-rigid and semi-flexible highway extension splicing structure and construction method - Google Patents
Semi-rigid and semi-flexible highway extension splicing structure and construction method Download PDFInfo
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- CN107740323A CN107740323A CN201711061062.3A CN201711061062A CN107740323A CN 107740323 A CN107740323 A CN 107740323A CN 201711061062 A CN201711061062 A CN 201711061062A CN 107740323 A CN107740323 A CN 107740323A
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- 238000010276 construction Methods 0.000 title claims abstract description 56
- 239000004575 stone Substances 0.000 claims abstract description 57
- 239000010410 layer Substances 0.000 claims description 93
- 239000000463 material Substances 0.000 claims description 51
- 239000010426 asphalt Substances 0.000 claims description 34
- 239000002344 surface layer Substances 0.000 claims description 9
- 238000003801 milling Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 238000005452 bending Methods 0.000 description 5
- 238000010008 shearing Methods 0.000 description 5
- 230000002929 anti-fatigue Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
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- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 208000010392 Bone Fractures Diseases 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
- E01C7/325—Joining different layers, e.g. by adhesive layers; Intermediate layers, e.g. for the escape of water vapour, for spreading stresses
Abstract
The invention discloses a semi-rigid and semi-flexible highway extension splicing structure and a construction method, and belongs to the field of road engineering. The framework is laid in the graded crushed stone layer of the new road of the semi-rigid and semi-flexible highway extension splicing structure and used for constraining aggregate. The construction method of the semi-rigid and semi-flexible highway extension splicing structure indicates the construction principle of the semi-rigid base layer and the graded crushed stone layer. The semi-rigid semi-flexible highway extension splicing structure has the advantages that the framework with the specific structure is added in the graded gravel layer of the widened pavement, the mechanical property of the graded gravel layer is effectively improved, damages such as reflection cracks and the like when the highway is in service are reduced, the construction principle is given by the construction method of the semi-rigid semi-flexible highway extension splicing structure, and the pavement after construction can meet the design requirements.
Description
Technical field
The invention belongs to field of road, is spelled more specifically to a kind of semi-rigid semi-flexible Widening of Freeway
Binding structure and construction method.
Background technology
With the continuous development of economy, the living standard more and more higher of people, self-driving automobile is more and more, in order to full
The needs that the sufficient volume of traffic increases are very necessary to the widening and rebuilding of existing highway.In the relative shortage of State owned land resource
In the case of, for reconstruction highway, widen old road roadbed with existing roadbed can be made full use of, shorten the construction period, and
The advantages of accounting for construction land less, therefore, in reconstruction and extension project, simple Disease Processing is generally carried out to the preferable section of part road conditions
Afterwards, retain original structure to use.In extension project, Pavement mosaic is the emphasis and difficult point of Widening of Freeway, and public at a high speed
Road extend success or failure key point, traditional Pavement mosaic method all be use with old road identical pavement structure, do not account for
Old road inside configuration drainage problem and the compatibility of deformation problem on new old road.Because new paving semi-rigid material is very fine and close, block
Old road water penetrates into the shipwreck of inside configuration to discharge, the road under traffic load or the repeated action of freeze thawing to the channel of exosmosis
Disease, the particularly seam crossings such as face structure is cracking quickly, purt slurry, loose and pit are easily cracking, pumping,
Bring and have a strong impact on to traffic safety.Further, since old road semi-rigid type base modulus largely decays, with the semi-rigid base in new road
Layer modulus difference is very big, if will certainly be caused using identical structure, flexure and sedimentation are uneven, and seam crossing ftractures and thus drawn
A series of derivative diseases risen are inevitable.
China is that the high-grade highway using highway as representative is built since the mid-80, wherein there is rigid road
Face and semi-rigid pavement.In the highway that oneself builds up, 95% is using semi-rigid material as basic unit, and bituminous concrete is surface layer
Road surface (abbreviation semi-rigid pavement).Semi-rigid type base has higher intensity and bearing capacity, good resistance to overturning and resistance to
Long property, to realize that the structure of " strong basis sake " provides Reliable guarantee.For semi-rigid pavement, through retrieval, Chinese patent application
Number it is：201710323179.8 publication date is：The patent document on July 11st, 2017, it is high to disclose a kind of semi-rigid semi-flexible
Fast highway enlarging pavement structure and construction method, when widening semi-rigid pavement, widen road surface using graded broken stone layer with it is semi-rigid
The semi-flexible composite construction that basic unit is formed, it is corresponding with the semi-rigid upper basic unit in former old road to extend basic unit's use on splicing pavement structure
Permeable graded broken stone structure sheaf, with the semi-rigid enlarging splicing road surface structare layer corresponding with underlayment of going to a grassroots level in former old road using anti-
Semi-rigid material layer is split, semi-rigid type base stitching portion step top surface sets reinforced mesh, strengthens the whole of the old and new's semi-rigid material layer
Body and tension, shearing resistance effect, improve the integrated carrying ability of the old and new's Pavement mosaic structure；The half just compound enlarging of semi-flexible is spelled
Binding structure, and combine interlayer and set using the discrepancy in elevation, it is ensured that old road inside configuration and seam crossing transverse drainage problem, effectively avoid old
Ponding and structural Moisture Damage inside pavement structure.The semi-rigid semi-flexible Widening of Freeway pavement structure is substantially to open up
A level has been added to match somebody with somebody metalling between the semi-rigid type base and asphalt surface course in broad way face, though graded broken stone structure sheaf preferably solves
Old road inside configuration drainage problem, but the shortcomings that graded broken stone also has oneself, especially in terms of mechanical property, for example, it
Shearing resistance, bending resistance are drawn and antifatigue etc. performance is poor.
The content of the invention
1. to solve the problems, such as
For existing graded broken stone layer as the semi-rigid type base on Widening of Freeway road surface and the intermediate layer of asphalt surface course
When, shearing resistance, bending resistance are drawn and the problem of the poor mechanical properties such as antifatigue, and the present invention provides a kind of semi-rigid semi-flexible highway
Extend splicing construction and construction method, graded broken stone of the semi-rigid semi-flexible Widening of Freeway splicing construction on broadening road surface
The skeleton of layer addition specific structure, the mechanical property of graded broken stone layer is effectively improved, so as to reduce enlarging highway clothes
Reflection crack etc. destroys during labour, and the construction method of the semi-rigid semi-flexible Widening of Freeway splicing construction gives construction original
Then, road surface can reach design requirement after ensureing work.
2. technical scheme
In order to solve the above problems, the technical solution adopted in the present invention is as follows：
A kind of semi-rigid semi-flexible highway, from top to bottom including surface layer in asphalt surface course, pitch, pitch below
Layer, graded broken stone layer, rubber asphalt stress absorbing layer, Semi-rigid material base layer and bottom semi-rigid material basic unit, described level
With skeleton is laid in metalling, skeleton is used to constrain aggregate.
A kind of semi-rigid semi-flexible Widening of Freeway splicing construction, including the enlarging of semi-rigid old road and old road side are new
Road, the old road includes upper asphalt surface course, middle asphalt surface course from top to bottom, lower asphalt surface course, basic unit, half be just on semi-rigid material
Property material is gone to a grassroots level, semi-rigid material underlayment, and from top to bottom, new road structure sheaf corresponding with old road is followed successively by pitch table
Surface layer, pitch cutting optimal, graded broken stone layer, Semi-rigid material base layer and bottom semi-rigid material basic unit, described in surface layer, pitch
Graded broken stone layer in lay skeleton, skeleton is used to constrain aggregate.
It is further preferred that also including rubber asphalt stress absorbing layer, described rubber asphalt stress absorbing layer is arranged on
It is corresponding with basic unit on semi-rigid material between graded broken stone layer and Semi-rigid material base layer.
It is further preferred that described skeleton includes support and grabs net, described net of grabbing is the string bag, and described net of grabbing is fixed
On support, adjacent to grab net opening direction opposite.
It is further preferred that the grading limit of graded broken stone layer is to pass through the mass percentage of sieve aperture：
26.5mm 100%；19mm, 85~95%；9.5mm, 50~70%；4.75mm, 35~55%；1.18mm, 15~
35%；0.6mm, 10~25%；0.075mm, 2~10%.
It is further preferred that the described string bag is a part for sphere, the single-row setting on support.
It is further preferred that the described string bag is 1/3~2/5 sphere, spherical radius is 4.5~8cm；The shape in string bag hole
For parallelogram, described diagonal of a parallelogram length is 3.5~7mm.
It is further preferred that the stitching portion on Xin Lu and old road is provided with splicing step.
It is further preferred that described old road splicing step is provided with scarfing slot.
A kind of construction method of semi-rigid semi-flexible Widening of Freeway splicing construction, on old road milling go out splicing station
Rank, lays each structure sheaf on new road successively, and semi-rigid type base abides by the principle when being constructed with graded broken stone layer：
A. one layer of rubber asphalt stress absorbing layer is laid between semi-rigid type base and graded broken stone layer；
B. graded broken stone layer is paved, integer, rolled several times, lays 5~10cm every time；
C. the layer bottom absolute altitude of graded broken stone layer is lower than the layer bottom absolute altitude of corresponding old road structure sheaf, graded broken stone layer with it is corresponding old
The angle of the contact surface of line structure floor and new road horizontal plane is less than 90 °.
3. beneficial effect
Compared to prior art, beneficial effects of the present invention are：
(1) grading of the semi-rigid semi-flexible highway of the present invention and semi-rigid semi-flexible Widening of Freeway splicing construction
One layer of rubber asphalt stress absorbing layer is laid between metalling and Semi-rigid material base layer, can effectively avoid rolling graded broken stone
During layer, in the minute crack of crushed stone aggregate insertion semi-rigid type base, the generation for deepening Crack failure phenomenon is increased；Graded broken stone layer
The middle skeleton laid for constraining aggregate, make graded broken stone layer intensity be no longer derived only from rubbing action between aggregate particle,
Interlock action and cementation, skeleton also shares a part of load, and skeleton is acted on the Constrained that gathers materials, always generation position
Gathering materials for moving retracts original place, prevents that structure is destroyed when stress from exceeding the active force between gathering materials；
(2) net of grabbing of the skeleton of the semi-rigid semi-flexible Widening of Freeway splicing construction of the present invention is the string bag, can be more preferable
Merged with aggregate particle, form interwoveness entirety, the interlock action of itself that gathers materials will not be damaged, adjacent grabs
Net opening direction prevents metalling to be permanently deformed on the contrary, generation slip and displacement between can preventing particle；
(3) string bag globulate of the semi-rigid semi-flexible Widening of Freeway splicing construction of the present invention, shape transition are mellow and full slow
Slowly, stress concentration is reduced, prevents that skeleton occurs fracture and destroyed during stress, extends its active time, in addition, single-row setting, can
To reduce influence of the incorporation skeleton to graded broken stone layer compactness；
(4) string bag of the semi-rigid semi-flexible Widening of Freeway splicing construction of the present invention is designed to that radius is 4.5~8cm's
1/3~2/5 sphere, mesh is parallelogram, when diagonal of a parallelogram length is 3.5~7mm, not only plays reinforcement work
With, it is also preferable to the effect of contraction that gathers materials, it is not subject to destroy；
(5) stitching portion of the semi-rigid semi-flexible Widening of Freeway splicing construction of the present invention sets splicing step, and spells
Connect and scarfing slot is set on step, the globality on new road and old road can be strengthened, acted on when preventing from being open to traffic by load, Xin Lu and old road
Seam crossing ftractures；
(6) construction method of the semi-rigid semi-flexible Widening of Freeway splicing construction of the present invention gives graded broken stone layer
Construction principle, graded broken stone layer are advantageously ensured that the uniformity of total layer compactness, improved broken using repeatedly laying in batches
The performance of rock layers, the layer bottom absolute altitude of graded broken stone layer are less than the layer bottom absolute altitude of corresponding old road structure sheaf, are advantageous to old road structure sheaf
In water discharged by metalling, contact surface and new road horizontal plane angle are less than 90 °, add contact area, improve moisture row
Go out efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the semi-rigid semi-flexible Widening of Freeway splicing construction of the present invention；
Fig. 2 is the dimensional structure diagram of the skeleton of the semi-rigid semi-flexible Widening of Freeway splicing construction of the present invention；
Fig. 3 is the main structure diagram of the skeleton of the semi-rigid semi-flexible Widening of Freeway splicing construction of the present invention；
Fig. 4 is the overlooking the structure diagram of the skeleton of the semi-rigid semi-flexible Widening of Freeway splicing construction of the present invention；
Fig. 5 is the left view structural representation of the skeleton of the semi-rigid semi-flexible Widening of Freeway splicing construction of the present invention；
Fig. 6 is the semi-rigid semi-flexible Widening of Freeway splicing construction graded broken stone layer of the present invention and old road counter structure layer
The structural representation of contact surface.
In figure：1st, upper asphalt surface course；2nd, middle asphalt surface course；3rd, lower asphalt surface course；4th, basic unit on semi-rigid material；5th, half just
Property material is gone to a grassroots level；6th, semi-rigid material underlayment；7th, asphalt surface course；8th, surface layer in pitch；9th, pitch cutting optimal；10th, level
With metalling；11st, rubber asphalt stress absorbing layer；12nd, Semi-rigid material base layer；13rd, bottom semi-rigid material basic unit；14th, it is embedding
Access slot；15th, skeleton；151st, support；152nd, net is grabbed.
Embodiment
The present invention is further described below with reference to specific embodiment.
Embodiment 1
With the development of China Transportation Industry, the problem of highway built in early days is progressively faced with enlarging, wherein
Majority is semi-rigid pavement,, can when new road is extended to improve the compatibility of deformation problem of old road structure internal drainage problem and new old road
A level is added to match somebody with somebody metalling between the semi-rigid type base on road surface and asphalt surface course widening, the drainage performance of metalling is good, and
Absorb and reduce cracks in semi-rigid base course point stresses and strain, reduce and delayed the generation of reflection crack.
But graded broken stone gathers materials the compound for being gathered materials by grade of all sizes and being formed, there is no cement in gathering materials,
The cementitious matter such as lime or pitch, it is commonly referred to as no binder or non-cementitious matter.The formation of its intensity and non-deformability are main
Rubbing action, interlock action and cementation between aggregate particle is relevant.Generally, its bending resistance draw ability even than
Cohesive fragile material is low, is drawn in shearing resistance, bending resistance and antifatigue etc. performance is poor.When being applied on highway, external force
In the presence of, it is easy to produce slip and displacement between particle, it is lost bearing capacity and is destroyed, comes from using effect
See, the bituminous paving on some test sections generates transverse crack and check crack, its quantity even more than road without graded broken stone
Section.
By groping repeatedly, we have devised a kind of skeleton 15 of specific structure, as shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5,
Skeleton 15 includes support 151 and grabs net 152, and it is the string bag to grab net 152, and the string bag is 1/3~2/5 sphere, is fixed on support 151,
Adjacent grabs the opening direction of net 152 on the contrary, the single-row setting on support 151.Skeleton 15 is uniformly filled in graded broken stone layer 10,
Can constrain and gather materials, make graded broken stone layer 10 intensity be no longer derived only from rubbing action between aggregate particle, interlock action and
Cementation, also form mechanical interlocking.This limitation hinders the motion gathered materials, and makes graded broken stone layer in the case of by load
More preferable compaction state, higher weight capacity, more preferable load transfer performance and more preferable resistance to permanent deformation energy can be reached
Power.
Semi-rigid semi-flexible Widening of Freeway splicing construction and its construction method are described further below：
As shown in figure 1, semi-rigid semi-flexible Widening of Freeway splicing construction includes semi-rigid old road and old road side
New road is extended, the old road is from top to bottom including on upper asphalt surface course 1, middle asphalt surface course 2, lower asphalt surface course 3, semi-rigid material
Basic unit 3, semi-rigid material go to a grassroots level 4, semi-rigid material underlayment 5, from top to bottom, new road structure sheaf corresponding with old road
It is followed successively by surface layer 8 in asphalt surface course 7, pitch, pitch cutting optimal 9, graded broken stone layer 10, Semi-rigid material base layer 12 and bottom
Semi-rigid material basic unit 13.
The grading limit of graded broken stone layer 10 is to pass through the mass percentage of sieve aperture：
26.5mm 100%；19mm, 85~95%；9.5mm, 50~70%；4.75mm, 35~55%；1.18mm, 15~
35%；0.6mm, 10~25%；0.075mm, 2~10%.
Above-mentioned skeleton 15 is uniformly filled in graded broken stone layer 10, the spherical radius of the string bag is 4.5~8cm；The shape in string bag hole
Shape is parallelogram, and diagonal of a parallelogram length is 3.5~7mm.The size of the string bag of the present embodiment must and this
The graded broken stone layer of invention strictly corresponds to, and spherical radius or string bag hole are excessive, does not have effect of contraction, the effect of big load
Under, larger slip and displacement can be still produced between particle, is destroyed, big crackle or road may especially occur
Face misplaces, too small, can destroy the embedding effect of lock of itself of gathering materials, and reduces compactness, destroys the globality of graded broken stone layer, even
Shearing resistance, the situation that bending resistance is drawn and the mechanical property such as antifatigue reduces occurs.
During construction, first milling goes out to splice step on old road, digs out scarfing slot 14 on splicing step afterwards, old road with it is new
Road is inlayed together, can be strengthened the globality on new road and old road, be acted on when preventing from being open to traffic by load, Xin Lu and old road seam crossing
Cracking.Then each structure sheaf on new road is laid successively, when laying graded broken stone layer 10, is paved, integer, is rolled several times,
5~10cm of laying every time, using once-paving, after rolling, the upper layer density of graded broken stone layer 10 is more than lower layer density, density unevenness
It is even, and repeatedly laying is used, the compactness of structure sheaf is uniform, and post-construction deformation can be reduced to minimum level.
Embodiment 2
The semi-rigid semi-flexible Widening of Freeway splicing construction and the structure of embodiment 1 of the present embodiment are essentially identical, no
It is with part：Also include rubber asphalt stress absorbing layer 11, rubber asphalt stress absorbing layer 11 is arranged on graded broken stone layer
(10) it is corresponding with basic unit on semi-rigid material 3 between Semi-rigid material base layer 12.
Construction of semi-rigid base is had a great influence by temperature and moisture, among construction, due to each side, such as half
After the aquation heat of rigid base is excessive, or semi-rigid type base is made, the overlong time of exposure in an atmosphere so that cement
The drying shrinkage effect of concrete is too obvious, and semi-rigid type base will be made to produce very wide, very deep crack.So doing graded broken stone layer
When 10, the effect rolled can be such that crushed stone aggregate is embedded into at caused crack in semi-rigid type base, embedded rubble bone
Material will be rigidly attached semi-rigid type base and road deck as chock.In the presence of load, this chock is the same
Aggregate can be deepened to increase the generation in crack, while graded broken stone layer 10 that also can be here produces crack.It can so accelerate on the contrary
The development of reflection crack.
Currently available technology is difficult to avoid semi-rigid type base preceding generation crack under arms, can only reduce reduction as far as possible,
It yet there are no the method for solving metalling aggregate insertion semi-rigid type base, and by rubber asphalt stress absorbing layer and graded broken stone layer knot
Apply altogether, reflection crack can be contained jointly and prevent Water Damage, moreover it is possible to solve metalling aggregate well and add to increasing
The problem of deep semi-rigid type base primary fracture.
Embodiment 3
The semi-rigid semi-flexible Widening of Freeway splicing construction and the structure of embodiment 1 of the present embodiment are essentially identical, no
It is with part：As shown in figure 5, the layer bottom absolute altitude of graded broken stone layer 10 is than corresponding old road structure sheaf (basic unit on semi-rigid material
4) layer bottom absolute altitude is low, and graded broken stone floor 10 is less than 90 ° with the contact surface of corresponding old road structure sheaf and the angle of new road horizontal plane.
The water be advantageous in the structure sheaf of old road is discharged by metalling, and contact area increases, and improves moisture expulsion efficiency.
Claims (10)
- A kind of 1. semi-rigid semi-flexible highway, from top to bottom including under surface layer (8), pitch in asphalt surface course (7), pitch Surface layer (9), graded broken stone layer (10), Semi-rigid material base layer (12) and bottom semi-rigid material basic unit (13), it is characterised in that： Also include rubber asphalt stress absorbing layer (11), described rubber asphalt stress absorbing layer (11) is arranged on graded broken stone layer (10) Between Semi-rigid material base layer (12), laying skeleton (15) in described graded broken stone layer (10), skeleton (15) is used for about Shugu material.
- 2. a kind of semi-rigid semi-flexible Widening of Freeway splicing construction, including the enlarging of semi-rigid old road and old road side are new Road, the old road is from top to bottom including on upper asphalt surface course (1), middle asphalt surface course (2), lower asphalt surface course (3), semi-rigid material Basic unit (3), semi-rigid material go to a grassroots level (4), semi-rigid material underlayment (5), and from top to bottom, the new road is corresponding with old road Structure sheaf is followed successively by surface layer (8) in asphalt surface course (7), pitch, pitch cutting optimal (9), graded broken stone layer (10), Semi-rigid Material base layer (12) and bottom semi-rigid material basic unit (13), it is characterised in that：Laying skeleton in described graded broken stone layer (10) (15), skeleton (15) is used to constrain aggregate.
- A kind of 3. semi-rigid semi-flexible Widening of Freeway splicing construction according to claim 2, it is characterised in that：Also wrap Rubber asphalt stress absorbing layer (11) is included, described rubber asphalt stress absorbing layer (11) is arranged on graded broken stone layer (10) with It is corresponding with basic unit on semi-rigid material (3) between semi-rigid material basic unit (12).
- A kind of 4. semi-rigid semi-flexible Widening of Freeway splicing construction according to Claims 2 or 3, it is characterised in that： Described skeleton (15) includes support (151) and grabs net (152), and described net (152) of grabbing is the string bag, and described grabs net (152) It is fixed on support (151), adjacent to grab net (152) opening direction opposite.
- A kind of 5. semi-rigid semi-flexible Widening of Freeway splicing construction according to claim 4, it is characterised in that：Grading The grading limit of metalling (10) is to pass through the mass percentage of sieve aperture：26.5mm 100%；19mm, 85~95%；9.5mm, 50~70%；4.75mm, 35~55%；1.18mm, 15~ 35%；0.6mm, 10~25%；0.075mm, 2~10%.
- A kind of 6. semi-rigid semi-flexible Widening of Freeway splicing construction according to claim 5, it is characterised in that：It is described The string bag be sphere a part, the single-row setting on support (151).
- A kind of 7. semi-rigid semi-flexible Widening of Freeway splicing construction according to claim 6, it is characterised in that：It is described The string bag be 1/3~2/5 sphere, spherical radius is 4.5~8cm；String bag hole is shaped as parallelogram, and described parallel four Side shape catercorner length is 3.5~7mm.
- A kind of 8. semi-rigid semi-flexible Widening of Freeway splicing construction according to Claims 2 or 3, it is characterised in that： The stitching portion on new road and old road is provided with splicing step.
- A kind of 9. semi-rigid semi-flexible Widening of Freeway splicing construction according to claim 8, it is characterised in that：It is described Old road splicing step be provided with scarfing slot (14).
- 10. a kind of construction method of semi-rigid semi-flexible Widening of Freeway splicing construction, on old road milling go out to splice step, Each structure sheaf on new road is laid successively, it is characterised in that：A. one layer of rubber asphalt stress absorbing layer is laid between semi-rigid type base and graded broken stone layer；B. graded broken stone layer is paved, integer, rolled several times, lays 5~10cm every time；C. the layer bottom absolute altitude of graded broken stone layer is lower than the layer bottom absolute altitude of corresponding old road structure sheaf, and graded broken stone layer is tied with corresponding old road The angle of the contact surface of structure floor and new road horizontal plane is less than 90 °.
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| CN201711061062.3A CN107740323B (en) | 2017-11-02 | 2017-11-02 | Semi-rigid and semi-flexible highway extension splicing structure and construction method |
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| CN201711061062.3A CN107740323B (en) | 2017-11-02 | 2017-11-02 | Semi-rigid and semi-flexible highway extension splicing structure and construction method |
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| CN107740323B CN107740323B (en) | 2019-01-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113174796A (en) * | 2021-04-27 | 2021-07-27 | 江苏金堰交通工程有限公司 | Road widening roadbed structure and construction process thereof |
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| CN107740323B (en) | 2019-01-18 |
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