CN1225961A - Super-thin road surface structure on elastic foundation and construction method thereof - Google Patents
Super-thin road surface structure on elastic foundation and construction method thereof Download PDFInfo
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- CN1225961A CN1225961A CN 99100059 CN99100059A CN1225961A CN 1225961 A CN1225961 A CN 1225961A CN 99100059 CN99100059 CN 99100059 CN 99100059 A CN99100059 A CN 99100059A CN 1225961 A CN1225961 A CN 1225961A
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Abstract
The ultrathin pavement structure on the elastic foundation is formed of base layer and surface layer, in which on the surface of the base layer there are close-distributed concave and convex portions, and the undersurface of the surface layer also is equipped with close-distributed concave and convex portions, and the concave portion of surface layer and the convex portions of base layer are mutually corresponded and jogged together to form the invented ultrathin pavement. Its main advantage lies in that the undersurface of the surface layer and upper surface of the base layer can produce stress centralization phenomenon in their interface to make the cement concrete possess high resistance to compression. The thickness of said ultrathin pavement is about 12 cm.
Description
The invention belongs to a kind of road structure, particularly in the thin road surface structure of a kind of speedway, airfield pavement.
As everyone knows, the stress of supercrust thin plate is the upper strata pressurized, lower floor's tension, and that the mechanical property of cement concrete is a compressive property is good, and tensile property is poor, and both differ more than 7 times.When rupturing because of flexural tensile stress is excessive at the bottom of the plate, the compressive stress on the plate upper strata stress that reaches capacity that is far from.In addition, the drawing of plate middle part, compressive stress are also very little, and thus, the thin plate supercrust has 70% material not play one's part to the full.
Purpose of the present invention at first is to change the stress performance of road slab, and the flexural tensile stress at the bottom of the plate is reduced greatly, is about below the 1Mpa, so that give full play to the anti-pressure ability of cement concrete, thereby further reduces road surface thickness, proposes a kind of thin road surface structure.
Another object of the present invention is the characteristic at above-mentioned thin road surface structure, a kind of job practices of thin road surface structure is proposed, except that the existing making machinery that can use slip form paver, propose a kind of heavy vibratory roller of special use again, make the substrate surface of road structure form densely covered convex-concave shape by its special roller.
The present invention also is to make temperature warping to answer cutter to alleviate greatly, because the flexural tensile stress of the horizontal direction at the bottom of the plate becomes compressive stress vertically downward, and the direction of temperature-warping stress still is positioned at horizontal plane, two kinds of stress are positioned at Different Plane, and direction difference, can not superpose to form and make a concerted effort, thereby the buckling deformation of road slab is alleviated greatly, expansion joint (E.J.) can be cancelled, spacing of joints can strengthen, has reduced smooth few seam to have fallen the limit arrisdefect on the road surface, and vehicle can be run at high speed.If seam reduces 1-3 doubly, the probability that the infiltration of raining damages the basis also will reduce 1-3 doubly.
The technical scheme of thin road surface structure of the present invention is: it mainly is made of basic unit and surface layer, base is characterised in that on the surface of described basic unit and is densely covered with jog, and also be densely covered with convexconcave part in the bottom surface of surface layer, the convex portion of surface layer bottom surface is corresponding and engaged with the recess on the substrate surface, closely connects into a kind of thin road surface structure that reduces by a half thickness than prevailing roadway structure at least.
Another technical scheme of thin road surface structure of the present invention is: it mainly is made of basic unit and face conducting shell, it is characterized in that evenly being equipped with the big stone of one deck in the rough surface of basic unit and the surface layer junction of graded broken stone, graded broken stone or calking rubble.
The basic unit of this thin road surface structure can be semi-rigid basis, poor concrete or roller compacted concrete, also can be the pellet of no binder or the material that does not have binder.
Surface layer bottom surface in this thin road surface structure and the convex-concave on the substrate surface and concaveconvex shape protrusions partly are positive garden platform or positive garden awl, and its recessed portion is platform of falling the garden or the awl of falling the garden.
The job practices of thin road surface structure of the present invention, its key step comprises: (1) leveling ground is also laid basic unit; (2) the heavy vibrating roller of a kind of special use of use, it is equipped with the roller of surface for densely covered convex-concave shape, substrate surface is rolled into the densely covered convex-concave shape of intersecting in length and breadth; (3) prop up decking; (4) use the sliding formwork machine of napping, build cement and concrete pavement; (5) maintenance and the cementation of fissures;
The heavy vibratory roller of special use in the job practices of thin road surface structure of the present invention, the roller that it is characterized in that described heavy vibratory roller, it is to be made of the gather top layer and the cylindrical shell internal layer of convex-concave shape of surface, bossing on its top layer is positive garden platform shape or positive taper, recessed portion is the platform of falling the garden or the taper that falls, and its top layer part and cylindrical shell internal layer are for being rolled into integral body or with connector both being combined into one.
Thin road surface structure of the present invention is applicable to highway pavement, airfield pavement, port and pier, engineering fields such as paving, square, town road road surface.
When base material is graded broken stone, graded gravel or calking rubble, use the road roller of special steel cylinder surface for densely covered convex-concave shape, the concaveconvex shape that substrate surface is extruded may be irregular, at this moment, behind the formwork, can in the storehouse, spread the shop big stone of one deck (stone flat, strip is chosen) again, use slip form paver then, cast-in-place cement and concrete pavement promptly constitutes the thin road surface of another kind of thick 12cm.Because about the high several times of modulus of elasticity of the modular ratio pavement concrete of big stone, under the vehicular load effect, subcrust will cause the stress concentration phenomenon, thereby change the stress on former thin plate road surface, give full play to the anti-pressure ability of cement concrete.
Thin road surface structure of the present invention has following advantage:
1, the interface on thin road surface lower floor and basic unit upper strata upward is a convex-concave, down for concavo-convex, engaged, closely connect because the modulus of elasticity difference of upper and lower material, above hard, following thin-skinned, the stress concentration phenomenon will take place.Or because the big stone of road slab heelpiece one deck, stone is hard, also the stress concentration phenomenon will take place, and the direction of this compressive stress is consistent with the vehicular load direction, all is vertically downward, thereby has brought into play the anti-pressure ability of cement concrete.Often stress is concentrated on the textbook of past classics and be described as bad phenomenon, the present invention has utilized the stress concentration phenomenon dexterously, changed the stress on former thin plate road surface, made the stress of thin road surface present the characteristics of shell structure (the thick shell that the ground supporting is arranged).
2, the temperature-warping stress of thin road surface will reduce than thin plate road surface, this is because concrete is different with the coefficient of thermal conductivity of base material, interlock up and down, thermal stresses with in the slave plate to around rapidly decay, traditional heat transfer theory is no longer suitable, and therefore, the theory of temperature-warping stress is calculated the difficulty that becomes, it can only the applying three-dimensional finite element analysis method try to achieve numerical solution, with more expensive effort.
On the other hand, temperature-warping stress is positioned at horizontal plane, and load stress is positioned at vertical guide (downwards), both formation not make a concerted effort.
Based on above two point analysiss, the temperature-warping stress of thin road surface will be alleviated greatly, and it will no longer be the essential factor of considering of pavement design, and the proportion that it accounts for load stress will significantly reduce.
Therefore, the expection expansion joint (E.J.) can be cancelled, and the seam distance can strengthen, and pavement quality will be improved.
3, the thick about 12cm of thin road surface, economic benefit is huge, repaiies 1 kilometer speedway and can economize about about 660,000 yuan of RMB.
For specifying thin road surface structure of the present invention, can be with reference to the following drawings and embodiment:
Fig. 1 is the phantom drawing of one of embodiment of this thin road surface structure; Fig. 2 is the mould sectional view of another embodiment of this thin road surface structure; Fig. 3 is a special roller phantom drawing in the heavy vibratory roller special-purpose in the job practices of this thin road surface structure.
In Fig. 1-2: 1 road structure, 2 surface layers, 3 basic units, the bossing of 4 surface layers bottom or the recessed portion of substrate surface, the recessed portion of the bossing of 5 substrate surface or surface layer bottom, 6 grounds, 7 big stone layers.
In Fig. 3: 11 rollers, 12 top layers, 13 cylindrical shell internal layers, the bossing on 14 top layers, the recessed portion on 15 top layers.
Embodiment 1:
A thin road structure 1 as shown in Figure 1, it is made of surface layer 2 and basic unit 3, and its basic unit 3 is a roller compacted concrete, its bossing is the positive garden platform shape of diameter 60mm, recessed portion is the platform of falling the garden shape of diameter 60mm, and concavo-convex gap is 60mm, and top course thickness is 12cm.
It is to be made of top layer 12 and internal layer 13 by this roller shown in Figure 1 11, on its top layer 12, be densely covered with bossing 14 and recessed portion 15, their mutual cross arrangements, its top layer 12 and internal layer 13 usefulness hot-rolled steels are integral, its bossing 14 and recessed portion 15 are positive garden platform and the platform of falling garden shape, its spacing is 60mm, and diameter is 60mm, and the weight of this roller 1 is 20T.
Thin road surface structure of the present invention is tested through Changsha Traffic College, the maximum principal tensile stress that plays thin road surface of thick 12cm is 6.3MPa, and the maximum principal tensile stress on the general energy road surface of thick 24cm is 1.60KPa, therefore, the thin road surface that 12cm is thick is equivalent to the thick prevailing roadway of 24cm, can reduce road surface thickness 50%.
Claims (8)
1, the thin road surface structure on a kind of elastic foundation, it mainly is made of basic unit and surface layer, it is characterized in that on the surface of described basic unit, being densely covered with jog, and also be densely covered with convexconcave part in the bottom surface of surface layer, convex portion wherein intersects densely covered with concave portion in length and breadth, and the convex portion of surface layer bottom surface is corresponding and engaged with the recess on the substrate surface, closely connects into a kind of thin road surface structure that reduces by a half thickness than prevailing roadway structure at least.
2, the thin road surface structure on a kind of elastic foundation, it mainly is made of basic unit and surface layer, it is characterized in that evenly being equipped with the big stone of one deck in the rough surface of basic unit and the surface layer junction of graded broken stone, graded gravel or calking rubble.
3, road structure as claimed in claim 1 is characterized in that described basic unit is semi-rigid basis, concrete or roller compacted concrete.
4, road structure as claimed in claim 1 is characterized in that described basic unit is the pellet of no binder or the material that does not have binder.
5, road structure as claimed in claim 1 is characterized in that described protuberance is positive garden platform or positive garden awl, and described recess is platform of falling the garden or the awl of falling the garden.
6, the job practices of the thin road surface structure on a kind of elastic foundation, its key step comprises:
(1) leveling ground and lay basic unit;
(2) the heavy vibrating roller of a kind of special use of use, it is equipped with the roller of surface for densely covered convex-concave shape, substrate surface is rolled into the densely covered convex-concave shape of intersecting in length and breadth;
(3) prop up decking;
(4) use slip form paver, build cement and concrete pavement;
(5) maintenance and the cementation of fissures;
7, a kind of heavy vibratory roller, the roller that it is characterized in that described heavy vibratory roller, it is to be made of the gather top layer and the cylindrical shell internal layer of convex-concave shape of surface, bossing on its top layer is positive garden platform shape or positive taper, recessed portion is the platform of falling the garden or the taper that falls, and its surface portion and cylindrical shell internal layer are for being rolled into integral body or with connector both being combined into one.
8, road roller as claimed in claim 7, the top layer that it is characterized in that described roller are garden arc cast steel sheet or glass steel disc, and its lip-deep convexconcave part is fixed or extension type
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99100059 CN1225961A (en) | 1999-01-04 | 1999-01-04 | Super-thin road surface structure on elastic foundation and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99100059 CN1225961A (en) | 1999-01-04 | 1999-01-04 | Super-thin road surface structure on elastic foundation and construction method thereof |
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| CN1225961A true CN1225961A (en) | 1999-08-18 |
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| CN 99100059 Pending CN1225961A (en) | 1999-01-04 | 1999-01-04 | Super-thin road surface structure on elastic foundation and construction method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104164816A (en) * | 2014-08-21 | 2014-11-26 | 四川金锋建设有限公司 | Pavement hardening system for rural road |
| CN104195912A (en) * | 2014-08-21 | 2014-12-10 | 四川金锋建设有限公司 | Construction method of country road hardened pavement system |
| CN104727199A (en) * | 2013-12-18 | 2015-06-24 | 罗祖辉 | High-strength roadbed |
| CN106835881A (en) * | 2017-02-24 | 2017-06-13 | 陈益民 | Prefabricated concrete structure layer wedge bearing spline plate flexible pavement |
| CN107620242A (en) * | 2017-11-10 | 2018-01-23 | 山东大学 | The plate pin-connected panel porous pavement made using waste plastic |
| CN110284389A (en) * | 2019-06-24 | 2019-09-27 | 安徽兴罗建设集团有限公司 | A kind of bituminous pavement and its construction method |
| CN114164723A (en) * | 2021-11-19 | 2022-03-11 | 山东高速工程建设集团有限公司 | Muck type construction waste filled highway subgrade and construction method thereof |
-
1999
- 1999-01-04 CN CN 99100059 patent/CN1225961A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727199A (en) * | 2013-12-18 | 2015-06-24 | 罗祖辉 | High-strength roadbed |
| CN104164816A (en) * | 2014-08-21 | 2014-11-26 | 四川金锋建设有限公司 | Pavement hardening system for rural road |
| CN104195912A (en) * | 2014-08-21 | 2014-12-10 | 四川金锋建设有限公司 | Construction method of country road hardened pavement system |
| CN106835881A (en) * | 2017-02-24 | 2017-06-13 | 陈益民 | Prefabricated concrete structure layer wedge bearing spline plate flexible pavement |
| CN107620242A (en) * | 2017-11-10 | 2018-01-23 | 山东大学 | The plate pin-connected panel porous pavement made using waste plastic |
| CN110284389A (en) * | 2019-06-24 | 2019-09-27 | 安徽兴罗建设集团有限公司 | A kind of bituminous pavement and its construction method |
| CN110284389B (en) * | 2019-06-24 | 2021-05-11 | 安徽兴罗建设集团有限公司 | Asphalt pavement and construction method thereof |
| CN114164723A (en) * | 2021-11-19 | 2022-03-11 | 山东高速工程建设集团有限公司 | Muck type construction waste filled highway subgrade and construction method thereof |
| CN114164723B (en) * | 2021-11-19 | 2022-12-13 | 山东高速工程建设集团有限公司 | Muck type building waste filled highway subgrade and construction method thereof |
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