CN106012743A - Semi-rigid base layer anti-cracking pavement structure and construction method suitable for high-temperature-difference area - Google Patents
Semi-rigid base layer anti-cracking pavement structure and construction method suitable for high-temperature-difference area Download PDFInfo
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- CN106012743A CN106012743A CN201610536479.XA CN201610536479A CN106012743A CN 106012743 A CN106012743 A CN 106012743A CN 201610536479 A CN201610536479 A CN 201610536479A CN 106012743 A CN106012743 A CN 106012743A
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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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Abstract
The invention discloses a semi-rigid base layer anti-cracking pavement structure and construction method suitable for a high-temperature-difference area. The pavement structure comprises face layers, base layers and pre-cracking cracks. The base layers and the face layer are arranged from bottom to top in sequence, the base layers comprise a lower base layer and an upper base layer, the face layers comprise a lower face layer and an upper face layer, and the lower face layer is arranged above the upper base layer; the base layers are internally provided with a plurality of the pre-cracking cracks, each pre-cracking crack comprises a pre-cut crack, a crack pouring material and a crack attaching material, the crack opening at the upper end of each pre-cut crack of each pre-cracking crack is flush with the upper end face of the upper base layer, the lower end of each pre-cut crack of each pre-cracking crack penetrates through the upper base layer and is arranged in the lower base layer, the crack pouring materials are poured into the pre-cut cracks of the pre-cracking cracks, and the upper end face of the upper base layer is provided with the crack attaching materials tightly attached to the crack openings at the upper end of the pre-cut cracks correspondingly. According to the semi-rigid base layer anti-cracking pavement structure and the construction method suitable for the high-temperature-difference area, cracks generated in the construction and maintenance period and the operation period of the semi-rigid base layers are actively controlled, the expansion rule in the pavement structure is changed, and damage, caused by crack reflection, to pitch pavement can be effectively lowered.
Description
Technical field
The present invention relates to field of road, particularly relate to a kind of semi-rigid type base cracking resistance road being applicable to high temperature difference area
Face structure and construction method.
Background technology
Recent two decades comes, and highway in China development is swift and violent, and road network layout gradual perfection, industrial grade improves constantly, and has
Support to power society, economic sustained and rapid development.But meanwhile, the high speed of highway transportation, heavy loading are to highway base
Construction and the operation of Infrastructure bring severe challenge.Under fully loaded transportation condition, for extenuating the vehicular load dynamic effect to roadbed, half
In the range of China and extensively, China is also accumulated from a large amount of warp at aspects such as the construction of semi-rigid pavement, uses in rigid base
Test.But, in practice, engineering staff finds, semi-rigid asphalt pavement also exists serious reflection crack problem, and this is
Become the Main Bottleneck of containment China Semi-Rigid Pavement Structure development.
Reflection crack be at the old asphalt pavement internal fissure ftractureed under the repeated action of traffic load and temperature load
Extend to the phenomenon of asphalt surface course.For semi-rigid asphalt pavement, usually owing to semi-rigid type base is in thermograde and wet
First produce contraction fissure in the case of degree change, then under the effect of traffic load crack be reflected up to asphalt surface course and
Form the gap run through.It destroys globality and the seriality of pavement structure, and causes structural strength to a certain extent
Weaken (as at crack, flexure increases, modulus of resilience reduction etc.).Additionally, in the case of sleety weather, rainwater easily invades road surface,
Cause basic unit's deliquescing, cause pavement structure to decline under the repeat function of traffic load, purt mud phenomenon, the drip of both sides, crack occur
Green material is damaged, occurs pit-hole therewith, it will be apparent that reduce traffic safety performance, Pavement Performance in Distress and life cycle and cause
The impact that can not estimate.
In China, substantial contribution will be put into every year and carry out the maintenance of highway infrastructures, wherein maintenance greatly
The disease that engineering causes to reflection crack is relevant.Therefore, it is highly desirable to existing Semi-Rigid Pavement Structure is optimized, solves
The reflection crack problem of semi-rigid pavement, significant for improving highway durability;Particularly with high temperature difference area
Road, will produce obvious economic benefit.
Summary of the invention
It is an object of the invention to the crack reflection problem overcoming existing Semi rigid bituminous surface structure to exist, it is provided that a kind of
It is applicable to semi-rigid type base anti-crack road surface structure and the construction method in high temperature difference area, for semi-rigid type base in construction preserving period
Interior and the operation phase, the interior crack produced carried out actively control, changes the propagation law in pavement structure, can effectively reduce and split
The destruction that bituminous paving is caused by seam reflection.
The purpose of the present invention is achieved through the following technical solutions:
A kind of semi-rigid type base anti-crack road surface structure being applicable to high temperature difference area, including surface layer, basic unit and precracking, institute
State basic unit, surface layer is sequentially arranged from bottom to up, and described basic unit includes that be sequentially arranged from bottom to up goes to a grassroots level and upper basic unit, described
Surface layer includes cutting optimal and the upper layer being sequentially arranged from bottom to up, and described cutting optimal is arranged on basic unit;Described basic unit
In be provided with several precracking, described precracking include pre-joint-cutting, gap-grouting material and patch seam material, the pre-joint-cutting of described precracking
Upper end sealing is concordant with upper basic unit upper surface, and the pre-joint-cutting lower end of described precracking is run through during basic unit is placed in going to a grassroots level,
Watering in the pre-joint-cutting of described precracking and be inoculated with gap-grouting material, described upper basic unit upper surface is provided with to sew on pre-cut holds sealing corresponding tight
The patch seam material of patch.
In order to the present invention is better achieved, being provided with waterproof layer between described upper basic unit and cutting optimal, described waterproof layer uses
Stone mastic asphalt is laid to construct and is formed.
So that upper basic unit is more firm with the base layer structure of composition of going to a grassroots level, described upper basic unit and setting between going to a grassroots level
Having sealing, sealing is run through in the pre-joint-cutting lower end of described precracking.
When practice of construction uses, the lower section of going to a grassroots level of described basic unit is provided with roadbed, and roadbed is semi-rigid type base cracking resistance road
The structure sheaf of face structural base.
As preferably, go to a grassroots level and the upper basic unit of described basic unit are laid to construct by cement stabilized macadam and form.
As preferably, in described basic unit, the spacing between adjacent two precrackings is 10m, under the pre-joint-cutting of described precracking
It is 1/3rd of overall vertical height of going to a grassroots level that end is placed in the vertical height gone to a grassroots level.
As preferably, described upper layer uses the laying of OGFC asphalt to construct and forms, and the thickness of upper layer is 4cm;
Described cutting optimal uses the laying of GAC asphalt to construct and forms, and the thickness of cutting optimal is 6cm.
A kind of semi-rigid type base anti-crack road surface construction method being applicable to high temperature difference area, its method step is as follows:
A, base layer construction: roadbed of first constructing out, under then using cement stabilized macadam laying to be built on roadbed
Basic unit, damages going to a grassroots level by construction machinery in work progress of going to a grassroots level and produces crack;Structure above going to a grassroots level
If building dried layer sealing, sealing for being filled with blocking to the place, crack gone to a grassroots level;Then steady by cement above sealing
Determine rubble to lay and be built into basic unit, during upper base layer construction by construction machinery on basic unit damage and produce and split
Seam;
B, precracking are constructed: upper basic unit, sealing, the constituted basic unit that goes to a grassroots level are carried out regular pattern of fractures process and obtained
Spacing is the pre-joint-cutting that 10m uniformly arranges, and waters gap-grouting material and pre-cut seamed stifled in each pre-joint-cutting, the filling in pre-joint-cutting
Seam material is for relying on the cohesive strength of gap-grouting material to reduce the focusing energy of base course crack, and the gap-grouting material in pre-joint-cutting is used for
Adhesion by gap-grouting material keeps the globality of cracking basic unit;Arrange in upper basic unit upper surface and sew on end sealing pair with pre-cut
The patch seam material that should be close to, reduces the basic crack impact on surface layer by the tensile strength of patch seam material;
C, basic unit integral waterproofing process: construct dried layer the waterproof layer of patch seam material is completely covered if laying in upper basic unit,
Waterproof layer processes for basic unit carries out integral waterproofing with the durability guaranteeing basic unit;
D, surface construction: lay the most successively above waterproof layer and construct cutting optimal and upper layer, described cutting optimal
Using GAC asphalt to lay and be built into the cutting optimal that thickness is 6cm, described upper layer uses OGFC asphalt to lay
It is built into the upper layer that thickness is 4cm.
The present invention compared with the prior art, has the following advantages and beneficial effect:
(1) conventional Pavement on Semi-rigid Type Base needs to carry out the health preserving of basic unit before making surface layer, and typically all divides two
Layer or three layers of making, conditioned time needs more than ten days;And the present invention is with little need for health preserving, it is layered making the most in order,
There is the advantage that speed of application is fast.
(2) conventional semi-rigid type base is all random cracking, and just forms the initial stage in the intensity gone to a grassroots level in the present invention
Carrying out sealing and the construction of upper basic unit, the destruction of machinery causes it to produce more fine fisssure, goes up basic unit when carrying out joint-cutting simultaneously, cuts
In the thickness range gone to a grassroots level, artificial releases temperature, drying shrinkage stress, the distribution in crack more rule, such present invention
Basic crack regularity high.
(3) present invention is provided with sealing and waterproof layer in the middle of upper and lower basic unit, and all bottoms with cutting optimal, the top of upper basic unit set
Sealing and waterproof layer are put, it is ensured that basic unit will not be impacted by rainwater.
(4) present invention has carried out the cementation of fissures and patch seam process at pre-lancing location, by caking property, the cohesiveness of gap-grouting material
Tensile property with patch seam material, it is ensured that the overall performance of pavement structure.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention is applicable to the semi-rigid type base anti-crack road surface structure in high temperature difference area;
Fig. 2 is the structural representation of the pre-joint-cutting of Tu1Zhong rigid base anti-crack road surface structure.
Wherein, entitled corresponding to the reference in accompanying drawing:
1-upper layer, 2-cutting optimal, 3-waterproof layer, the upper basic unit of 4-, 5-sealing, 6-goes to a grassroots level, 7-roadbed, 8-
Pre-joint-cutting, 9-patch seam material, 10-gap-grouting material.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail:
Embodiment
As shown in Fig. 1~Fig. 2, a kind of be applicable to high temperature difference area semi-rigid type base anti-crack road surface structure, including surface layer,
Basic unit and precracking, basic unit, surface layer be sequentially arranged from bottom to up, and what basic unit included being sequentially arranged from bottom to up go to a grassroots level 6 and upper
Basic unit 4, surface layer includes cutting optimal 2 and the upper layer 1 being sequentially arranged from bottom to up, and cutting optimal 2 is arranged on basic unit 4.Base
Be provided with several precrackings in Ceng, after upper basic unit 4 has constructed, basic unit 300h DEG C (h DEG C be conditioned time h and
The product of ambient temperature DEG C) position carries out pre-joint-cutting, and precracking includes pre-joint-cutting 8, gap-grouting material 10 and patch seam material 9, presplitting
The pre-joint-cutting 8 upper end sealing of seam is concordant with upper basic unit 4 upper surface, and pre-joint-cutting 8 lower end of precracking is run through basic unit 4 and is placed in down
In basic unit 6, watering and be inoculated with gap-grouting material 10 in the pre-joint-cutting 8 of precracking, the gap-grouting material 10 of the present embodiment is preferably base joint grouting glue,
The gap-grouting material 10 of the present embodiment uses the base joint grouting glue that Shanxi Xi Yuefa company limited researches and develops, and gap-grouting material 10 can be again seam
Material, gap-grouting material 10 is used for the focusing energy relying on the cohesive strength of gap-grouting material 10 to reduce base course crack, and in pre-joint-cutting 8
Gap-grouting material 10 for keeping the globality of cracking basic unit by the adhesion of gap-grouting material 10;Gap-grouting material 10 and base joint grouting glue
Purposes be specifically shown in document: Su little Lei. the making of high performance asphalt pavement base joint grouting glue and application [J]. Chinese Highway, 2012,
(20): 115-117.Upper basic unit 4 upper surface is provided with the patch be close to corresponding with pre-joint-cutting 8 upper end sealing seam material 9.The present embodiment
Patch seam material 9 is preferably rubber matizhi stress absorption band, and patch seam material 9 uses the rubber agate of Shanxi Prov. Inst. of Traffic Sciences
Hoof fat stress absorption band.Rubber matizhi stress absorption band and patch seam material 9 are specifically shown in document: Liu Zhisheng. combination of rigidity and flexibility formula
Pavement crack reflection prevention technique progress [J]. material Leader, 2016,30 (2): P (89).
Being provided with waterproof layer 3 between currently preferred upper basic unit 4 and cutting optimal 2, waterproof layer 3 uses asphalt-mastic-broken stone
Compound is laid to construct and is formed, and stone mastic asphalt is to be used by high-load coarse aggregate, high-load breeze, bigger Colophonium
Amount, the framework dense structure type asphalt of low content median diameter granule composition, stone mastic asphalt is first
Being applied to Capital Airport expressway construction in 1992, current stone mastic asphalt has been frequent in road engineering
Use is arrivedAsphalt。
As it is shown in figure 1, upper basic unit 4 and go to a grassroots level and be provided with sealing 5 between 6, sealing 5 is run through in pre-joint-cutting 8 lower end of precracking,
Sealing is a technical term in field of road, a kind of thin layer compound that sealing is prepared by the material such as Colophonium, building stones, envelope
The manufacture raw material of layer is commonly referred to slurry seal ES-1 type.Sealing 5 uses the laying of slurry seal ES-1 type to construct as can be seen here
Form.The sealing 5 of the present embodiment can also use stone mastic asphalt laying to construct and form.
In actual pavement structure work progress, going to a grassroots level of basic unit is provided with roadbed 7 below 6.
Going to a grassroots level of the present embodiment basic unit 6 is laid by cement stabilized macadam with upper basic unit 4 and is constructed and form.
As it is shown in figure 1, the spacing between adjacent two precrackings is 10m in basic unit, pre-joint-cutting 8 lower end of precracking is placed in
Go to a grassroots level 6 vertical height preferably go to a grassroots level 1/3rd of 6 overall vertical height, the present invention pre-joint-cutting 8 lower end is put
In go to a grassroots level 6 vertical height be the 1/4~1/3 of 6 overall vertical height of going to a grassroots level.
Currently preferred upper layer 1 uses the laying of OGFC asphalt to construct and forms, and OGFC asphalt is drip
One in blue or green compound, the most commonly referred to open-shelf range asphalt.Specific practice is shown in China's people's republicanism
State's industry standard (standard specification for construction and acceptance of highway asphalt pavement JTG F40 2004) table 5.3.2-4;The thickness of upper layer 1 is
4cm.Cutting optimal 2 uses the laying of GAC asphalt to construct and forms, and the thickness of cutting optimal 2 is that 6cm, GAC asphalt is for changing
Good bituminous concrete AC type, specific practice is shown in People's Republic of China's industry standard (standard specification for construction and acceptance of highway asphalt pavement
JTG F40 2004) table 5.3.2-1.The cutting optimal 2 of the present embodiment uses the laying of GAC-13C asphalt to construct and forms.
Semi-rigid type base anti-crack road surface structure of the present invention is mainly the crack reflection extenuating semi-rigid asphalt pavement
Asking, therefore divide two-layer to construct semi-rigid type base, 6 constructions of going to a grassroots level carry out sealing 5 immediately and construct and upper basic unit 4 constructs after completing,
Purpose is to go to a grassroots level and 66 damages going to a grassroots level by construction machinery during forming intensity, produces fine fisssure.And seal
Fine fisssure is added stifled by layer 5, and plays waterproof effect.After upper basic unit 4 has constructed, carry out pre-joint-cutting, by by upper basic unit
Partial fracture identical with the partial fracture gone to a grassroots level reach Fracture distribution, the crack of pre-cut reaches and goes to a grassroots level simultaneously
6, release the temperature contracting within basic unit and drying shrinkage stress further.The cementation of fissures now carrying out pre-joint-cutting processes, and is sealed in crack
Stifled, reduced the focusing energy of base course crack by the cohesive strength of gap-grouting material 10, keep the globality of cracking basic unit by adhesion.
And carry out pasting seam process, extenuate the basic crack impact on surface layer by the tensile strength of patch seam material 9.Additionally, making is waterproof
Layer 3, carries out the water-proofing treatment of globality, it is ensured that the durability of basic unit to basic unit.When making waterproof layer 3, in order to prevent heat from mixing
Technology causes deformation to the over-heating of patch seam material 9, and reduces due function, uses warm mix when waterproof layer 3 is constructed
Technology carries out the making of stone mastic asphalt.Cutting optimal 2 uses GAC asphalt to be that comprehensively to refer to GAC good
Good high temperature performance, and upper layer 1 use OGFC be consider high temperature difference area can extenuate highway top layer summer high temperature and
Freezed in winter disease.
A kind of semi-rigid type base anti-crack road surface construction method being applicable to high temperature difference area, its method step is as follows:
A, base layer construction: roadbed 7 of first constructing out, then use cement stabilized macadam to lay on roadbed 7 and be built into
Go to a grassroots level 6, to going to a grassroots level by construction machinery 6 damage and produce crack in 6 work progress of going to a grassroots level;Going to a grassroots level 6
If dried layer sealing 5 is constructed in top, sealing 5 for go to a grassroots level 6 place, crack be filled with blocking;Then above sealing 5
By cement stabilized macadam lay be built into upper basic unit 4, in upper basic unit 4 work progress by construction machinery on basic unit 4 make
Become destroy and produce crack;
B, precracking are constructed: upper basic unit 4, sealing 5,6 basic units constituted that go to a grassroots level are carried out regular pattern of fractures process also
Obtaining spacing is the pre-joint-cutting 8 that 10m uniformly arranges, and waters gap-grouting material 10 and blocked, in advance by pre-joint-cutting 8 in each pre-joint-cutting 8
Gap-grouting material 10 in joint-cutting 8 reduces the focusing energy of base course crack, and pre-joint-cutting 8 for relying on the cohesive strength of gap-grouting material 10
In gap-grouting material 10 for keeping the globality of cracking basic unit by the adhesion of gap-grouting material 10;In upper basic unit 4 upper surface
The patch be close to corresponding with pre-joint-cutting 8 upper end sealing seam material 9 is set, reduces basic crack by the tensile strength of patch seam material 9
Impact on surface layer;
C, basic unit integral waterproofing process: construct dried layer the waterproof layer of patch seam material 9 is completely covered if laying in upper basic unit 4
3, waterproof layer 3 processes for basic unit carries out integral waterproofing with the durability guaranteeing basic unit;
D, surface construction: lay the most successively above waterproof layer 3 and construct cutting optimal 2 and upper layer 1, cutting optimal 2
Using GAC asphalt to lay and be built into the cutting optimal that thickness is 6cm, upper layer 1 uses OGFC asphalt to lay structure
Build up the upper layer that thickness is 4cm.
Above-mentioned embodiment is a preferred embodiment of the present invention, is not for limiting the enforcement of the present invention and power
Profit scope, all equivalence change and approximations made according to the content described in the present patent application scope of patent protection are replaced, all should
It is within the scope of the present invention.
Claims (7)
1. one kind be applicable to high temperature difference area semi-rigid type base anti-crack road surface structure, it is characterised in that: include surface layer, basic unit and
Precracking, described basic unit, surface layer be sequentially arranged from bottom to up, and described basic unit includes go to a grassroots level (6) being sequentially arranged from bottom to up
With upper basic unit (4), described surface layer includes cutting optimal (2) and the upper layer (1) being sequentially arranged from bottom to up, described cutting optimal (2)
It is arranged on basic unit (4);Being provided with several precrackings in described basic unit, described precracking includes pre-joint-cutting (8), cementation of fissures material
Material (10) and patch seam material (9), pre-joint-cutting (8) the upper end sealing of described precracking is concordant with upper basic unit (4) upper surface, described pre-
Pre-joint-cutting (8) lower end in crack is run through basic unit (4) and is placed in going to a grassroots level in (6), waters in the pre-joint-cutting (8) of described precracking
Being inoculated with gap-grouting material (10), described upper basic unit (4) upper surface is provided with the patch be close to corresponding with pre-joint-cutting (8) upper end sealing seam material
(9).
2. according to the semi-rigid type base anti-crack road surface structure being applicable to high temperature difference area described in claim 1, it is characterised in that:
It is provided with waterproof layer (3) between described upper basic unit (4) and cutting optimal (2).
3., according to the semi-rigid type base anti-crack road surface structure being applicable to high temperature difference area described in claim 1 or 2, its feature exists
In: described upper basic unit (4) and go to a grassroots level and be provided with sealing (5) between (6), sealing is run through in pre-joint-cutting (8) lower end of described precracking
(5).
4. according to the semi-rigid type base anti-crack road surface structure being applicable to high temperature difference area described in claim 1, it is characterised in that:
(6) lower section of going to a grassroots level of described basic unit is provided with roadbed (7).
5. according to the semi-rigid type base anti-crack road surface structure being applicable to high temperature difference area described in claim 3, it is characterised in that:
The going to a grassroots level of described basic unit (6) and upper basic unit (4) are laid to construct by cement stabilized macadam and form.
6. according to the semi-rigid type base anti-crack road surface structure being applicable to high temperature difference area described in claim 1, it is characterised in that:
In described basic unit, the spacing between adjacent two precrackings is 10m, and pre-joint-cutting (8) lower end of described precracking is placed in goes to a grassroots level
(6) vertical height is 1/3rd of (6) overall vertical height of going to a grassroots level.
7. the semi-rigid type base anti-crack road surface construction method being applicable to high temperature difference area, it is characterised in that: its method
Step is as follows:
A, base layer construction: roadbed (7) of first constructing out, then use cement stabilized macadam to lay on roadbed (7) and be built into
Go to a grassroots level (6), by construction machinery, go to a grassroots level (6) are damaged and produce crack in (6) work progress of going to a grassroots level;Under
Basic unit (6) is if dried layer sealing (5) is constructed in top, and sealing (5) is for being filled with blocking to the place, crack of go to a grassroots level (6);Connect
Sealing (5) top by cement stabilized macadam lay be built into upper basic unit (4), in upper basic unit (4) work progress by
Upper basic unit (4) is damaged and produces crack by construction machinery;
B, precracking are constructed: the basic unit being constituted upper basic unit (4), sealing (5), go to a grassroots level (6) carries out crack treatment and obtains
Spacing is the pre-joint-cutting (8) that 10m uniformly arranges, and in each pre-joint-cutting (8), pre-joint-cutting (8) is sealed by pouring gap-grouting material (10)
Stifled;The patch be close to seam material (9) corresponding with pre-joint-cutting (8) upper end sealing is set in upper basic unit (4) upper surface, by patch seam material
(9) tensile strength reduces the basic crack impact on surface layer;
C, basic unit's integral waterproofing process: in upper basic unit (4) if dried layer is constructed in upper laying, and the waterproof layer of patch seam material (9) is completely covered
(3), waterproof layer (3) processes for basic unit carries out integral waterproofing with the durability guaranteeing basic unit;
D, surface construction: lay the most successively in waterproof layer (3) top and construct cutting optimal (2) and upper layer (1).
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CN109056484B (en) * | 2018-08-15 | 2020-06-23 | 中国葛洲坝集团股份有限公司 | Cement-stabilized gravel layer parting construction method |
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