CN112281561A - Heavy-load long-service-life highway structure and construction method - Google Patents
Heavy-load long-service-life highway structure and construction method Download PDFInfo
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- CN112281561A CN112281561A CN202011106431.8A CN202011106431A CN112281561A CN 112281561 A CN112281561 A CN 112281561A CN 202011106431 A CN202011106431 A CN 202011106431A CN 112281561 A CN112281561 A CN 112281561A
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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
- E01C1/00—Design or layout of roads, e.g. for noise abatement, for gas absorption
- E01C1/002—Design or lay-out of roads, e.g. street systems, cross-sections ; Design for noise abatement, e.g. sunken road
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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
- E01C3/00—Foundations for pavings
- E01C3/006—Foundations for pavings made of prefabricated single units
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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
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
A heavy-duty long-life highway structure and a construction method thereof comprise a roadbed, a substrate and an asphalt pavement layer; the base plate is a prefabricated part and is fixedly arranged on the upper part of the roadbed; the asphalt pavement layer is paved on the upper part of the substrate; the base plate is plate-shaped, a base plate lower pressing plate is arranged at the lower side of one side end part of the base plate, and a base plate upper pressing plate is arranged at the upper side of the other side end part of the base plate; when the base plates are arranged on the roadbed, along the driving direction of a vehicle, the base plate upper pressing plate of the front base plate is arranged on the upper part of the base plate lower pressing plate of the rear base plate to connect a plurality of base plates into a whole, so that the problem that when an independent plate structure passes along with a heavy-load vehicle, the expansion and contraction joints of adjacent cement plates generate alternate vertical dislocation change, and the problem that a bituminous pavement layer generates reflective cracks is solved; the heavy-load long-service-life road structure has the advantages of simple structure, simple and convenient construction process and short construction period, and greatly improves the bearing capacity and the service life of the road.
Description
Technical Field
The invention relates to the technical field of highway construction, in particular to a heavy-load long-service-life highway structure and a construction method.
Background
At present, the road surface structure is mainly divided into a cement road surface and an asphalt road surface, and after the road is built and used for a period of time, various diseases such as cracks, pits, ruts, looseness, subsidence, surface damage and the like can be generated in succession; the cement pavement is of a rigid structure, the vibration impact of driving is large, and the main reason for heavy-load diseases is that in the pavement construction process, due to improper initial maintenance, micro cracks are generated due to early too-rapid dehydration drying shrinkage and carbonization shrinkage of a concrete mixture, the micro cracks gradually develop under the vibration impact of the heavy-load driving, and finally, penetrated transverse cracks, longitudinal cracks, oblique cracks and plate angle cracks appear; the asphalt pavement is of an elastic structure, the vibration impact of driving is small, and the main reason for the generation of heavy-load diseases is that the tensile stress generated in the elastic roadbed and the asphalt pavement exceeds the bearing strength of the elastic roadbed and the asphalt pavement due to overlarge traffic flow or serious overload, so that the permanent deformation of the elastic roadbed and the asphalt pavement occurs, the permanent deformation develops continuously, the asphalt pavement aggregate is loosened, and the asphalt pavement cracks and net cracks are generated under the action of continuous alternating load and rainwater immersion, and the development is continued to further cause the damage of the asphalt pavement; therefore, diseases of the cement pavement are closely related to improper maintenance in the construction process of the cement pavement and overlarge driving impact caused by a rigid structure, diseases of the asphalt pavement are closely related to incapability of bearing heavy loads of a roadbed and an asphalt pavement layer of an elastic structure of the asphalt pavement, and if the diseases of the cement pavement and the asphalt pavement are combined, namely the rigid cement roadbed and the elastic asphalt pavement are adopted, the problems of the cement pavement and the asphalt pavement can be perfectly solved, so that the bearing capacity of the highway is greatly improved, and the service life of the highway is greatly prolonged.
The existing domestic example of laying an asphalt layer on the cement road surface constructed originally is actually available, so that the bearing capacity and the service life of the road are greatly improved; but it has another serious problem, namely, in the course of construction of original cement road surface, in order to solve the problem of expansion and shrinkage caused by climate change, it has expansion and shrinkage cracks, therefore the cement road surface is actually an independent cement slab block structure; after an asphalt layer is laid on a road surface of an original cement independent plate structure, in the using process, along with the passing of a heavy-duty vehicle, the expansion and contraction joint of adjacent cement plates can generate alternate vertical dislocation change, the alternate vertical dislocation change can cause the upper asphalt layer to generate alternate shear stress change, and finally, a reflective crack is generated on the asphalt layer at the expansion and contraction joint of the adjacent cement plates; after the reflective cracks of the asphalt layer are generated, periodic bumping vibration can occur when a vehicle passes through, so that the driving comfort is influenced, the reflective cracks continue to develop, and the service life of a road can also be influenced.
The invention patent with the patent number of 201510077194.X discloses a joint construction method for preventing reflection cracks of asphalt additionally paved on an old cement pavement, which is characterized in that a plurality of horseshoe-shaped steel bars are arranged at the joint of two old concrete surface blocks to reduce the relative vertical displacement of two sides of the joint of the old plate and plate, so that the generation and development of the reflection cracks are prevented, and the reflection cracks of the asphalt additionally paved surface layer of the old cement pavement are reduced or prevented; however, in practice, if a heavy-duty vehicle passes through the method, the intensity of the method cannot completely eliminate the relative vertical displacement at two sides of the slab joint of the old slab due to the limited number of the horseshoe-shaped steel bars, and the occurrence of reflection cracks of the asphalt pavement additionally paved on the old cement pavement cannot be completely eliminated, so the actual implementation effect is not ideal.
The invention patent with the patent number of 201910037752.8 discloses an asphalt pavement composite structure and a construction method, wherein the asphalt pavement composite structure reduces the influence of temperature stress and differential deformation on a road structure and blocks a reflection channel of a crack by arranging a first filler, a second filler, an elastic filler, a first deformation coordinating plate, a second deformation coordinating plate, an elastic joint layer and a vertical bearing pier, thereby achieving the purpose of preventing the upper layer of asphalt from generating a reflective crack; however, the pavement structure and construction process are complicated, and thus the actual implementation thereof may result in an increase in the service life and construction cost, and further improvement is required.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention discloses a heavy-load long-service-life highway structure and a construction method; comprises a roadbed, a substrate and an asphalt pavement layer; the base plate is a prefabricated part and is fixedly arranged on the upper part of the roadbed; the asphalt pavement layer is paved on the upper part of the substrate; the base plate is plate-shaped, a base plate lower pressing plate is arranged on the lower side of one side end of the base plate, and a base plate upper pressing plate is arranged on the upper side of the other side end of the base plate; the end part of the substrate provided with the substrate lower pressing plate is provided with a substrate butt joint groove, and the end part of the substrate upper pressing plate is provided with a substrate butt joint; a substrate telescopic block is fixedly arranged at the bottom of the substrate butt joint groove; when the base plates are arranged on the roadbed, along the driving direction of a vehicle, the base plate upper pressing plate of the front base plate is arranged at the upper part of the base plate lower pressing plate of the rear base plate; the substrate butt joint at the end part of the compression joint plate on the previous substrate is correspondingly arranged in the substrate butt joint groove at the end part of the next substrate; the heavy-load long-service-life highway structure of the invention connects a plurality of base plates into a whole through the base plates which are vertically lapped along the driving direction of a vehicle, thereby thoroughly solving the problem that when an independent plate structure passes along with a heavy-load vehicle, the expansion and contraction joint of adjacent cement plates generates alternate vertical dislocation change, and further solving the root cause of the occurrence of reflective cracks on an asphalt pavement layer.
In order to realize the purpose, the invention adopts the following technical scheme: a heavy-duty long-life highway structure comprises a roadbed, a substrate and an asphalt pavement layer; the base plate is fixedly arranged on the upper part of the roadbed; the asphalt pavement layer is paved on the upper part of the substrate; the base plate is the inside cement prefab that is provided with the steel reinforcement cage, and it is rigid structure, and the setting is back on elasticity road bed, for the pitch road surface layer of superiors provides the rigidity support basis, has solved the not enough problem of road bed rigidity of traditional pitch road surface in the past, even when the traffic flow is too big or seriously overload, the problem that tensile stress surpassed its bearing strength and took place permanent deformation can not take place in the pitch road surface layer yet, and then has prevented the structural damage of pitch road surface layer, consequently has the characteristics of heavily loaded high life.
Further, the base plate is plate-shaped, a base plate lower pressing plate is arranged on the lower side of one side end of the base plate, and a base plate upper pressing plate is arranged on the upper side of the other side end of the base plate; when the base plates are arranged on the roadbed, along the driving direction of a vehicle, the base plate upper pressing plate of the front base plate is arranged on the upper part of the base plate lower pressing plate of the rear base plate, so that the adjacent base plates are connected into a whole; the end part of the base plate, which is provided with a base plate lower compression joint plate, is provided with a base plate butt joint groove, the end part of the base plate upper compression joint plate is provided with a base plate butt joint head, and the bottom of the base plate butt joint groove is fixedly provided with a base plate telescopic block; when the front substrate and the rear substrate are connected and arranged on a construction site, the substrate butt joint of the front substrate is correspondingly arranged in the substrate butt joint groove of the rear substrate, the substrate butt joint on the front substrate is abutted against the substrate telescopic block of the substrate butt joint groove of the rear substrate, and a parallel expansion and contraction joint is formed between the substrate butt joint of the two substrates and the substrate butt joint groove; the purpose of setting up base plate butt joint groove, base plate butt joint has two: when in site construction, the method is used for connecting and aligning the front substrate and the rear substrate, so that the construction precision is higher, and the construction speed is improved; secondly, the longer expansion joint between the front and the back base plates is separated into shorter expansion joints which are staggered front and back, so that the influence of the expansion joints on the asphalt pavement layer is further reduced; the base plate telescopic blocks are made of hard rubber materials, and when the base plate telescopic blocks are constructed on site, parallel expansion and contraction joints are naturally formed by abutting the base plate butt joints on the front base plate and the base plate telescopic blocks on the rear base plate, so that the base plates are more convenient to connect and construct on site; the expansion and contraction joint is internally provided with expansion and contraction joint filler which is a mixture of modified asphalt and quartz sand, has certain elasticity and can naturally adapt to the width change of the expansion and contraction joint along with the change of air temperature, and meanwhile, the expansion and contraction joint filler also prevents the loss of asphalt pavement layer materials caused by the fact that the asphalt pavement layer materials are extruded to enter the expansion and contraction joint in the use process of the road, so that the asphalt pavement layer has material loss reflective cracks.
Preferably, the base plate is plate-shaped, a base plate lower pressing plate is arranged at the lower side of one end part of the base plate, and a base plate upper pressing plate is arranged at the upper side of the other end part of the base plate; the end part of the substrate provided with the substrate lower pressing plate is provided with a substrate butt joint groove, and the end part of the substrate upper pressing plate is provided with a substrate butt joint; a substrate telescopic block is fixedly arranged at the bottom of the substrate butt joint groove; when the base plates are arranged on the roadbed, along the driving direction of a vehicle, the base plate upper pressing plate of the front base plate is arranged at the upper part of the base plate lower pressing plate of the rear base plate; the substrate butt joint at the end part of the compression joint plate on the previous substrate is correspondingly arranged in the substrate butt joint groove at the end part of the next substrate; the substrate butt joint at the end part of the compression joint plate on the front substrate is abutted against the substrate telescopic block of the substrate butt joint groove at the end part of the rear substrate; the upper edges of the substrate butt joint groove and the substrate butt joint are provided with oblique angles, when the substrate butt joint at the end part of a compression joint plate on the current substrate is correspondingly arranged in the substrate butt joint groove at the end part of the next substrate, the adjacent oblique angles of the upper end surfaces of the substrate butt joint groove and the substrate butt joint form a V-shaped stress release groove type expansion and contraction joint, the opening width of the V-shaped stress release groove is 1.5-2 times of the thickness of the asphalt pavement layer, the depth is 25% -35% of the thickness of the asphalt pavement layer, and the proper opening width and depth of the V-shaped stress release groove are set, so that the phenomenon that the surface of the asphalt pavement layer is uneven can be avoided while the stress influence of the width change of the expansion and contraction joint; expansion and contraction joint filling materials are arranged in the expansion and contraction joint of the V-shaped stress release groove, and the filling height of the expansion and contraction joint filling materials is one of the five directions to the four directions of the depth of the V-shaped stress release groove; the V-shaped stress release groove can widen the original narrow expansion joint, when the expansion joint generates width change along with the change of air temperature, the influence of the width change of the expansion joint on the stress of the upper asphalt pavement layer is released in a wider range, the stress concentration generated in the asphalt pavement layer corresponding to the upper part of the expansion joint is avoided, and therefore the influence of the width change of the expansion joint on the upper asphalt pavement layer is reduced.
Further, a compression joint plate buffer layer is arranged between the upper compression joint plate of the base plate and the lower compression joint plate of the base plate; the compression joint plate buffer layer and the expansion joint filler are made of the same material and are a mixture of modified asphalt and quartz sand with the particle size of 1.0-1.5mm, and the weight ratio of the modified asphalt to the quartz sand is 80: 20; the purpose of arranging the compression joint plate buffer layer is to compensate flatness error of the contact surface of the upper compression joint plate of the base plate and the lower compression joint plate of the base plate, bond the upper compression joint plate of the base plate and the lower compression joint plate of the base plate into a whole, and simultaneously buffer impact force when a heavy-duty vehicle passes through the joint of the upper compression joint plate of the base plate and the lower compression joint plate of the base plate;
furthermore, the upper board surface array of the substrate is provided with a pavement layer connecting lug, and the lower board surface array of the substrate is provided with a substrate anti-displacement lug; after the asphalt pavement layer is laid, the pavement layer connecting lug is embedded into the lower part of the asphalt pavement layer and is used for reinforcing the connecting strength between the upper plate surface of the substrate and the asphalt pavement layer, so that the problem that when a heavy-duty vehicle passes through, the combination part of the bottom of the asphalt pavement layer and the upper plate surface of the substrate slides tangentially to generate ruts due to overlarge compressive stress of the local asphalt pavement layer is solved; after the base plate is arranged on the roadbed, the anti-displacement lug of the base plate is embedded into the roadbed through repeated rolling of heavy-duty vehicles, so that the relative displacement between the base plate and the roadbed is prevented in the use process of the highway; the road surface layer connecting lug and the substrate anti-displacement lug are pyramid-shaped, and the height of the road surface layer connecting lug is smaller than that of the substrate anti-displacement lug; wherein the height of the pavement layer connecting convex blocks is set to be 5-10mm, the height of the substrate anti-displacement convex blocks is set to be 20-30mm, and the height of the smaller pavement layer connecting convex blocks is used for preventing the reflective unevenness generated on the asphalt pavement layer from influencing the comfort level of driving; the center of the upper board surface of the base board is provided with a base board lifting ring, and the lifting ring is used for carrying out construction by adopting a crane when the base board is transported and constructed on site so as to improve the construction efficiency.
Preferably, the upper plate surface array of the substrate is provided with trapezoidal grooves parallel to the vehicle running direction; under the general condition, when taking place the rut problem, the rut direction is unanimous with the driving direction, consequently the face array sets up the trapezoidal slot parallel with vehicle direction of travel on the base plate, can effectively prevent when heavy-duty vehicle from passing through, takes place tangential slip and produces the rut in bituminous paving layer bottom and the face junction on the base plate, adopts trapezoidal slot, can effectively reduce the processing degree of difficulty of base plate casting die.
Furthermore, two sides of the substrate and the asphalt pavement layer are provided with road shoulders which are used for preventing rainwater from eroding the pavement; the middle of the asphalt pavement layer is provided with a hard shoulder used for preventing vehicles from crossing the roadway and moving backwards when the vehicles run on the highway.
Further, the base plate is a prefabricated part which is produced and finished in a cement product prefabrication factory; a reinforcement cage is arranged in the substrate and is manufactured by casting and maintaining a prefabricated mould through cement mortar; the base plate is produced in batches in cement product prefabrication plants, and has the advantages of high efficiency and stable quality, and meanwhile, the prefabricated base plate is constructed in a splicing connection mode in a construction site without performing later maintenance on the base plate, so that the site construction efficiency is greatly improved, and the road construction period is greatly shortened.
The construction method of the heavy-load long-life highway comprises the following construction processes in a construction site:
s1, roadbed construction: after the roadbed construction is finished, lime lattice drawing and line drawing are carried out;
s2, substrate construction: when constructing the base plate, the construction direction is carried out against the vehicle running direction; marking lines according to lime grids during roadbed construction, and hoisting a base plate by using a hoisting machine to place the base plate on the finished roadbed; when the first substrate is laid, optical measurement is assisted to ensure the position placement accuracy of the first substrate;
performing optical measurement calibration once every five substrates are laid and constructed subsequently; after the previous substrate is placed, pouring a compression joint plate buffer layer on the upper surface of the lower compression joint plate of the previous substrate by using asphalt pouring equipment, wherein the pouring temperature is 170-190 ℃; after the compression joint plate buffer layer is poured, hoisting the next substrate by using a hoisting machine; the upper pressing plate of the next substrate is pressed on the upper part of the lower pressing plate of the previous substrate, and the substrate butt joint at the end part of the upper pressing plate of the next substrate is correspondingly arranged in the substrate butt joint groove at the end part of the previous substrate; the substrate butt joint at the end part of the compression joint plate on the next substrate is abutted against the substrate telescopic block of the substrate butt joint groove at the end part of the next substrate, and a dilatation joint between the substrate butt joint of the two substrates and the substrate butt joint groove is naturally formed;
after the hoisting of the next substrate is finished, filling expansion and shrinkage joint filler between expansion and shrinkage joints of the two substrates by using asphalt pouring equipment, wherein the pouring temperature is 170-190 ℃; for the parallel expansion and contraction joint, the filling height of the expansion and contraction joint filler is flush with the upper end surface of the substrate; before filling expansion and contraction joint filler, blowing and dedusting the expansion and contraction joint;
during the construction of the base plate, a truck having a total weight of 50 to 60 tons is used to repeatedly roll the base plate on the base plate for five times or more.
S3, construction of road shoulders: and digging a road shoulder groove along the outer side of the paved substrate by using a grooving machine, then arranging a road shoulder along the road shoulder groove, backfilling and fixing, and pointing by using cement mortar.
S4, constructing an asphalt pavement layer: constructing the asphalt pavement along the driving direction of the vehicle; after the road shoulder construction is finished, blowing the residual floating soil on the upper surface of the substrate; spraying bonding asphalt on the upper surface of the substrate; paving the asphalt pavement material, and flattening the asphalt pavement material by using a vibratory roller to form an asphalt pavement layer.
S5, setting a hard shoulder: and according to the set spacing distance, arranging a separation pier in the middle of the asphalt pavement layer.
S6, initial maintenance of the asphalt pavement layer: after the construction of the heavy-load long-life highway is completed, the traffic can be opened after the asphalt pavement layer is completely and naturally cooled to the room temperature; controlling the speed not to exceed 30km/h at the initial stage of open traffic, determining the time according to the actual traffic volume and load condition of the road, and keeping the duration for 20-30 days; and strictly forbidding all vehicles to run reversely within the initial maintenance time of the asphalt pavement layer.
Further, for the expansion and contraction joint of the V-shaped stress release groove, asphalt pouring equipment is used for pouring expansion and contraction joint filler, the pouring temperature is 170-190 ℃, and the filling height of the expansion and contraction joint filler is one of the fifth square to the fourth square of the depth of the V-shaped stress release groove; before filling expansion and contraction joint filler, blowing and dedusting the V-shaped stress release tank.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: the invention discloses a heavy-load long-life highway structure and a construction method; comprises a roadbed, a substrate and an asphalt pavement layer; the base plate is a prefabricated part and is fixedly arranged on the upper part of the roadbed; the asphalt pavement layer is paved on the upper part of the substrate; the base plate is plate-shaped, a base plate lower pressing plate is arranged on the lower side of one side end of the base plate, and a base plate upper pressing plate is arranged on the upper side of the other side end of the base plate; the end part of the substrate provided with the substrate lower pressing plate is provided with a substrate butt joint groove, and the end part of the substrate upper pressing plate is provided with a substrate butt joint; a substrate telescopic block is fixedly arranged at the bottom of the substrate butt joint groove; when the base plates are arranged on the roadbed, along the driving direction of a vehicle, the base plate upper pressing plate of the front base plate is arranged at the upper part of the base plate lower pressing plate of the rear base plate; the substrate butt joint at the end part of the compression joint plate on the previous substrate is correspondingly arranged in the substrate butt joint groove at the end part of the next substrate; the heavy-load long-service-life highway structure of the invention connects a plurality of base plates into a whole through the base plates which are vertically lapped along the driving direction of a vehicle, thereby thoroughly solving the problem that when an independent plate structure passes along with a heavy-load vehicle, the expansion and contraction joint of adjacent cement plates generates alternate vertical dislocation change, and further solving the root cause of the occurrence of reflective cracks on an asphalt pavement layer; meanwhile, the heavy-load long-service-life road structure has the advantages of simple structure, low manufacturing cost, simple and convenient construction process and short construction period, and simultaneously greatly improves the bearing capacity and the service life of the road.
Drawings
FIG. 1 is a schematic view of a heavy-duty long-life road structure;
FIG. 2 is a schematic cross-sectional view of a heavy-duty long-life road structure;
FIG. 3 is a schematic view of a substrate according to an embodiment;
FIG. 4 is a schematic view of a second embodiment of the substrate;
FIG. 5 is a schematic view of a substrate layout structure according to an embodiment;
FIG. 6 is a schematic cross-sectional view of a substrate arrangement structure in parallel to a driving direction according to an embodiment;
FIG. 7 is an enlarged view of a portion A of the embodiment;
FIG. 8 is a schematic external view of a second substrate according to an embodiment;
FIG. 9 is a schematic view of a second substrate layout structure according to an embodiment;
FIG. 10 is a schematic cross-sectional view of a second substrate mounting structure in parallel to the direction of the vehicle in the embodiment;
FIG. 11 is an enlarged view of a portion B of the second embodiment.
In the figure: 1. a roadbed, 2, a substrate; 2.1, pressing and connecting the plate under the substrate; 2.2, a substrate butt joint groove; 2.3, pressing a plate on the substrate; 2.4, substrate butt joint; 2.5, a substrate telescopic block; 2.6, a base plate hanging ring; 2.7, connecting the road surface layer with the bump; 2.8, preventing the substrate from displacing the lug; 2.9, bevel angle; 3. an asphalt pavement layer; 4. a road shoulder; 5. a hard shoulder; 6. A compression joint plate buffer layer; 7. a V-shaped stress relief groove; 8. and (5) filling expansion and contraction joints.
Detailed Description
The present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.
The first embodiment is as follows:
a heavy-duty long-life highway structure comprises a roadbed 1, a substrate 2 and an asphalt pavement layer 3; the base plate 2 is a prefabricated part and is produced in a cement product prefabrication factory; a reinforcement cage is arranged in the base plate 2 and is formed by casting and maintaining a prefabricated mould through cement mortar; the base plate 2 is fixedly arranged on the upper part of the roadbed 1; the asphalt pavement layer 3 is paved on the upper part of the substrate 2; the two sides of the substrate 2 and the asphalt pavement layer 3 are provided with road shoulders 4; the middle of the asphalt pavement layer 3 is provided with a separation pier 5;
the base plate 2 is plate-shaped, a base plate lower pressing plate 2.1 is arranged at the lower side of one side end part of the base plate 2, and a base plate upper pressing plate 2.3 is arranged at the upper side of the other side end part of the base plate 2; the end part of the base plate 2 provided with the base plate lower compression joint plate 2.1 is provided with a base plate butt joint groove 2.2, and the end part of the base plate upper compression joint plate 2.3 is provided with a base plate butt joint 2.4; a substrate telescopic block 2.5 is fixedly arranged at the bottom of the substrate butt joint groove 2.2; when the base plate 2 is arranged on the roadbed 1, along the driving direction of the vehicle, the base plate upper pressing plate 2.3 of the former base plate 2 is arranged at the upper part of the base plate lower pressing plate 2.1 of the latter base plate 2; the substrate butt joint 2.4 at the end part of the pressure welding plate 2.3 on the previous substrate is correspondingly arranged in the substrate butt joint groove 2.2 at the end part of the next substrate 2; the substrate butt joint 2.4 at the end part of the pressure welding plate 2.3 on the former substrate is abutted with the substrate telescopic block 2.5 of the substrate butt joint groove 2.2 at the end part of the latter substrate 2, and a parallel expansion and contraction joint is formed between the substrate butt joint 2.4 of the two substrates 2 and the substrate butt joint groove 2.2; expansion and contraction joint packing 8 is arranged in the expansion and contraction joint;
a compression joint plate buffer layer 6 is arranged between the upper compression joint plate 2.3 of the base plate and the lower compression joint plate 2.1 of the base plate; the compression joint plate buffer layer 6 and the expansion and contraction joint filler 8 are made of the same material and are a mixture of modified asphalt and quartz sand with the particle size of 1.0-1.5mm, and the weight ratio of the modified asphalt to the quartz sand is 80: 20;
the upper board surface array of the substrate 2 is provided with pavement layer connecting lugs 2.7, and the lower board surface array thereof is provided with substrate anti-displacement lugs 6; the road surface layer connecting lug 2.7 and the substrate anti-displacement lug 2.8 are pyramid-shaped, and the height of the road surface layer connecting lug 2.7 is smaller than that of the substrate anti-displacement lug 2.8; and a base plate lifting ring 2.6 is arranged at the center of the upper plate surface of the base plate 2.
The construction method of the heavy-load long-life highway comprises the following construction processes in a construction site:
s1, roadbed construction: after the roadbed construction is finished, lime lattice drawing and line drawing are carried out;
s2, substrate construction: when the base plate 2 is constructed, the construction direction is opposite to the vehicle running direction; marking lines according to lime grids during roadbed construction, and hoisting the base plate 2 by a hoisting machine to be placed on the finished roadbed; assisting optical measurement while laying the first substrate 2 to ensure positional placement accuracy of the first substrate 2;
performing optical measurement calibration once every five substrates 2 are laid and constructed subsequently; after the previous substrate 2 is placed, pouring a compression joint plate buffer layer 6 on the upper surface of a compression joint plate 2.1 of the previous substrate 2 by using asphalt pouring equipment at the pouring temperature of 170-190 ℃; after the compression joint plate buffer layer 6 is poured, hoisting the next substrate 2 by using a hoisting machine; the upper base plate pressing plate 2.3 of the next base plate 2 is pressed on the upper part of the lower base plate pressing plate 2.1 of the previous base plate 2, and the base plate butt joint 2.4 at the end part of the upper base plate pressing plate 2.3 of the next base plate is correspondingly arranged in the base plate butt joint groove 2.2 at the end part of the previous base plate 2; the substrate butt joint 2.4 at the end part of the pressure welding plate 2.3 on the next substrate is abutted with the substrate telescopic block 2.5 of the substrate butt joint groove 2.2 at the end part of the next substrate 2, and an expansion and contraction joint between the substrate butt joint 2.4 of the two substrates 2 and the substrate butt joint groove 2.2 is naturally formed;
after the next substrate 2 is hoisted, filling expansion and shrinkage joint fillers 8 between the expansion and shrinkage joints 2.4 of the two substrates 2 and the expansion and shrinkage joint grooves 2.2 by using asphalt pouring equipment, wherein the pouring temperature is 170-190 ℃; for the parallel expansion and contraction joint, the filling height of the expansion and contraction joint filler 8 is flush with the upper end surface of the substrate 2; before filling the expansion and shrinkage joint filler 8, blowing and dedusting the expansion and shrinkage joint;
the base board 2 is laid and constructed while a truck having a total weight of 50 to 60 tons is repeatedly rolled on the already-laid base board 2 five times or more.
S3, construction of road shoulder 4: and digging a road shoulder groove along the outer side of the laid substrate 2 by using a grooving machine, then arranging a road shoulder 4 along the road shoulder groove, backfilling and fixing, and pointing by using cement mortar.
S4, constructing an asphalt pavement layer 3: the construction of the asphalt pavement layer 3 is carried out along the driving direction of the vehicle; after the construction of the road shoulder 4 is completed, blowing the residual floating soil on the upper surface of the substrate 2; spraying bonding asphalt on the upper surface of the substrate 2; paving the asphalt pavement material, and flattening the asphalt pavement material by using a vibratory roller to form an asphalt pavement layer 3.
S5, setting a hard shoulder: according to the set spacing distance, a separation pier 5 is arranged in the middle of the asphalt pavement layer 3.
S6, initial maintenance of the asphalt pavement layer 3: after the construction of the heavy-load long-life highway is completed, the traffic can be opened after the asphalt pavement layer 3 is completely and naturally cooled to the room temperature; controlling the speed not to exceed 30km/h at the initial stage of open traffic, determining the time according to the actual traffic volume and load condition of the road, and keeping the duration for 20-30 days; and strictly forbidding all vehicles to run reversely within the initial curing time of the asphalt pavement layer 3.
Example two:
a heavy-duty long-life highway structure comprises a roadbed 1, a substrate 2 and an asphalt pavement layer 3; the base plate 2 is a prefabricated part and is produced in a cement product prefabrication factory; a reinforcement cage is arranged in the base plate 2 and is formed by casting and maintaining a prefabricated mould through cement mortar; the base plate 2 is fixedly arranged on the upper part of the roadbed 1; the asphalt pavement layer 3 is paved on the upper part of the substrate 2; the two sides of the substrate 2 and the asphalt pavement layer 3 are provided with road shoulders 4; the middle of the asphalt pavement layer 3 is provided with a separation pier 5;
the base plate 2 is plate-shaped, a base plate lower pressing plate 2.1 is arranged at the lower side of one side end part of the base plate 2, and a base plate upper pressing plate 2.3 is arranged at the upper side of the other side end part of the base plate 2; the end part of the base plate 2 provided with the base plate lower compression joint plate 2.1 is provided with a base plate butt joint groove 2.2, and the end part of the base plate upper compression joint plate 2.3 is provided with a base plate butt joint 2.4; a substrate telescopic block 2.5 is fixedly arranged at the bottom of the substrate butt joint groove 2.2; when the base plate 2 is arranged on the roadbed 1, along the driving direction of the vehicle, the base plate upper pressing plate 2.3 of the former base plate 2 is arranged at the upper part of the base plate lower pressing plate 2.1 of the latter base plate 2; the substrate butt joint 2.4 at the end part of the pressure welding plate 2.3 on the previous substrate is correspondingly arranged in the substrate butt joint groove 2.2 at the end part of the next substrate 2; the substrate butt joint 2.4 at the end part of the pressure welding plate 2.3 on the former substrate is abutted with the substrate telescopic block 2.5 of the substrate butt joint groove 2.2 at the end part of the latter substrate 2; the upper edges of the substrate butt joint groove 2.2 and the substrate butt joint 2.4 are provided with oblique angles 2.8, when the substrate butt joint 2.4 at the end part of the current substrate pressing plate 2.3 is correspondingly arranged in the substrate butt joint groove 2.2 at the end part of the next substrate 2, the adjacent oblique angles 2.9 of the upper end surfaces of the substrate butt joint groove 2.2 and the substrate butt joint 2.4 form a V-shaped stress release groove 7 type expansion and contraction joint, the opening width of the V-shaped stress release groove 7 is 1.5-2 times of the thickness of the asphalt pavement layer 3, and the depth is 25% -35% of the thickness of the asphalt pavement layer 3; expansion and contraction joint packing 8 is arranged in an expansion and contraction joint of the V-shaped stress release groove 7, and the filling height of the expansion and contraction joint packing 8 is one of the fifth square to the fourth square of the depth of the V-shaped stress release groove 7;
a compression joint plate buffer layer 6 is arranged between the upper compression joint plate 2.3 of the base plate and the lower compression joint plate 2.1 of the base plate; the compression joint plate buffer layer 6 and the expansion and contraction joint filler 8 are made of the same material and are a mixture of modified asphalt and quartz sand with the particle size of 1.0-1.5mm, and the weight ratio of the modified asphalt to the quartz sand is 80: 20;
the upper plate surface array of the substrate 2 is provided with trapezoidal grooves parallel to the vehicle running direction, and the lower plate surface array is provided with substrate anti-displacement lugs 6; the substrate anti-displacement bump 2.8 is pyramid-shaped, and the depth of the trapezoidal groove is smaller than the height of the substrate anti-displacement bump 2.8; and a base plate lifting ring 2.6 is arranged at the center of the upper plate surface of the base plate 2.
The construction method of the heavy-load long-life highway comprises the following construction processes in a construction site:
s1, roadbed construction: after the roadbed construction is finished, lime lattice drawing and line drawing are carried out;
s2, substrate construction: when the base plate 2 is constructed, the construction direction is opposite to the vehicle running direction; marking lines according to lime grids during roadbed construction, and hoisting the base plate 2 by a hoisting machine to be placed on the finished roadbed; assisting optical measurement while laying the first substrate 2 to ensure positional placement accuracy of the first substrate 2;
performing optical measurement calibration once every five substrates 2 are laid and constructed subsequently; after the previous substrate 2 is placed, pouring a compression joint plate buffer layer 6 on the upper surface of a compression joint plate 2.1 of the previous substrate 2 by using asphalt pouring equipment at the pouring temperature of 170-190 ℃; after the compression joint plate buffer layer 6 is poured, hoisting the next substrate 2 by using a hoisting machine; the upper base plate pressing plate 2.3 of the next base plate 2 is pressed on the upper part of the lower base plate pressing plate 2.1 of the previous base plate 2, and the base plate butt joint 2.4 at the end part of the upper base plate pressing plate 2.3 of the next base plate is correspondingly arranged in the base plate butt joint groove 2.2 at the end part of the previous base plate 2; the substrate butt joint 2.4 at the end part of the pressure welding plate 2.3 on the next substrate is abutted with the substrate telescopic block 2.5 of the substrate butt joint groove 2.2 at the end part of the next substrate 2, and an expansion and contraction joint between the substrate butt joint 2.4 of the two substrates 2 and the substrate butt joint groove 2.2 is naturally formed;
after the next substrate 2 is hoisted, pouring a V-shaped stress release groove 7 between the expansion and contraction joints 2.4 of the two substrates 2 and the expansion and contraction joints of the substrate butt joint grooves 2.2 by using asphalt pouring equipment, wherein the pouring temperature is 170-190 ℃; the filling height of the expansion and contraction joint filler 8 is one of the fifth square to the fourth square of the depth of the V-shaped stress release groove 7; before the filling of the expansion and shrinkage joint filler 8, the V-shaped stress relief groove 7 is purged for dust removal.
The base board 2 is laid and constructed while a truck having a total weight of 50 to 60 tons is repeatedly rolled on the already-laid base board 2 five times or more.
S3, construction of road shoulder 4: and digging a road shoulder groove along the outer side of the laid substrate 2 by using a grooving machine, then arranging a road shoulder 4 along the road shoulder groove, backfilling and fixing, and pointing by using cement mortar.
S4, constructing an asphalt pavement layer 3: the construction of the asphalt pavement layer 3 is carried out along the driving direction of the vehicle; after the construction of the road shoulder 4 is completed, blowing the residual floating soil on the upper surface of the substrate 2; spraying bonding asphalt on the upper surface of the substrate 2; paving the asphalt pavement material, and flattening the asphalt pavement material by using a vibratory roller to form an asphalt pavement layer 3.
S5, setting a hard shoulder: according to the set spacing distance, a separation pier 5 is arranged in the middle of the asphalt pavement layer 3.
S6, initial maintenance of the asphalt pavement layer 3: after the construction of the heavy-load long-life highway is completed, the traffic can be opened after the asphalt pavement layer 3 is completely and naturally cooled to the room temperature; controlling the speed not to exceed 30km/h at the initial stage of open traffic, determining the time according to the actual traffic volume and load condition of the road, and keeping the duration for 20-30 days; and strictly forbidding all vehicles to run reversely within the initial curing time of the asphalt pavement layer 3.
Finally, supplementary explanation shows that when a parallel expansion and contraction joint is formed between the substrate butt joint 2.4 and the substrate butt joint groove 2.2, the thickness of the asphalt pavement layer 3 is more than 200mm, and the influence of the width change of the expansion and contraction joint on the upper asphalt pavement layer is avoided; when the V-shaped stress relief groove 7 is formed between the substrate butt joint 2.4 and the substrate butt joint groove 2.2, the width-to-height ratio of the V-shaped stress relief groove 7 is reasonably set according to experience, so that the phenomenon that the asphalt pavement layer on the upper part of the V-shaped stress relief groove 7 is uneven in long-term use is avoided.
The present invention is not described in detail in the prior art.
Claims (10)
1. The utility model provides a heavy load high life highway structure, characterized by: comprises a roadbed (1), a substrate (2) and an asphalt pavement layer (3); the base plate (2) is fixedly arranged on the upper part of the roadbed (1); the asphalt pavement layer (3) is paved on the upper part of the substrate (2).
2. The heavy-duty long-life road structure of claim 1, wherein: the base plate (2) is plate-shaped, a base plate lower pressing plate (2.1) is arranged on the lower side of one end part of the base plate (2), and a base plate upper pressing plate (2.3) is arranged on the upper side of the other end part of the base plate (2); the end part of the base plate (2) provided with the base plate lower compression joint plate (2.1) is provided with a base plate butt joint groove (2.2), and the end part of the base plate upper compression joint plate (2.3) is provided with a base plate butt joint head (2.4); a substrate telescopic block (2.5) is fixedly arranged at the bottom of the substrate butt joint groove (2.2); when the base plate (2) is arranged on the roadbed (1), along the driving direction of the vehicle, the base plate upper pressure joint plate (2.3) of the front base plate (2) is arranged at the upper part of the base plate lower pressure joint plate (2.1) of the rear base plate (2); the substrate butt joint (2.4) at the end part of the pressure welding plate (2.3) on the previous substrate is correspondingly arranged in the substrate butt joint groove (2.2) at the end part of the next substrate (2); a substrate butt joint (2.4) at the end part of a pressure welding plate (2.3) on the previous substrate is abutted with a substrate telescopic block (2.5) of a substrate butt joint groove (2.2) at the end part of the next substrate (2), and a parallel expansion and contraction joint is formed between the substrate butt joint (2.4) of the two substrates (2) and the substrate butt joint groove (2.2); and expansion and contraction joint fillers (8) are arranged in the expansion and contraction joints.
3. The heavy-duty long-life road structure of claim 1, wherein: the base plate (2) is plate-shaped, a base plate lower pressing plate (2.1) is arranged on the lower side of one end part of the base plate (2), and a base plate upper pressing plate (2.3) is arranged on the upper side of the other end part of the base plate (2); the end part of the base plate (2) provided with the base plate lower compression joint plate (2.1) is provided with a base plate butt joint groove (2.2), and the end part of the base plate upper compression joint plate (2.3) is provided with a base plate butt joint head (2.4); a substrate telescopic block (2.5) is fixedly arranged at the bottom of the substrate butt joint groove (2.2); when the base plate (2) is arranged on the roadbed (1), along the driving direction of the vehicle, the base plate upper pressure joint plate (2.3) of the front base plate (2) is arranged at the upper part of the base plate lower pressure joint plate (2.1) of the rear base plate (2); the substrate butt joint (2.4) at the end part of the pressure welding plate (2.3) on the previous substrate is correspondingly arranged in the substrate butt joint groove (2.2) at the end part of the next substrate (2); the substrate butt joint (2.4) at the end part of the pressure welding plate (2.3) on the former substrate is abutted with the substrate telescopic block (2.5) of the substrate butt joint groove (2.2) at the end part of the latter substrate (2); the upper edges of the substrate butt joint grooves (2.2) and the substrate butt joint heads (2.4) are provided with oblique angles (2.8), when the substrate butt joint head (2.4) at the end part of the pressure welding plate (2.3) on the current substrate is correspondingly arranged in the substrate butt joint groove (2.2) at the end part of the next substrate (2), the adjacent oblique angles (2.9) on the upper end surfaces of the substrate butt joint groove (2.2) and the substrate butt joint head (2.4) form V-shaped stress release groove (7) type expansion and contraction joints, the opening width of the V-shaped stress release groove (7) is 1.5-2 times of the thickness of the asphalt pavement layer (3), and the depth is 25% -35% of the thickness of the asphalt pavement layer (3); and a dilatation joint filler (8) is arranged in a dilatation joint of the V-shaped stress release groove (7), and the filling height of the dilatation joint filler (8) is one of the fifth square to the fourth square of the depth of the V-shaped stress release groove (7).
4. The heavy-duty long-life road structure according to claim 2 or 3, characterized in that: a compression joint plate buffer layer (6) is arranged between the upper compression joint plate (2.3) of the base plate and the lower compression joint plate (2.1) of the base plate; the compression joint plate buffer layer (6) and the expansion and contraction joint filler (8) are made of the same material and are a mixture of modified asphalt and quartz sand with the particle size of 1.0-1.5mm, and the weight ratio of the modified asphalt to the quartz sand is 80: 20.
5. The heavy-duty long-life road structure of claim 1, wherein: the upper plate surface array of the substrate (2) is provided with pavement layer connecting lugs (2.7), and the lower plate surface array is provided with substrate anti-displacement lugs (6); the road surface layer connecting bump (2.7) and the substrate anti-displacement bump (2.8) are pyramid-shaped, and the height of the road surface layer connecting bump (2.7) is smaller than that of the substrate anti-displacement bump (2.8); and a base plate lifting ring (2.6) is arranged at the center of the upper plate surface of the base plate (2).
6. The heavy-duty long-life road structure of claim 1, wherein: the upper plate surface of the substrate (2) is provided with trapezoidal grooves parallel to the running direction of the vehicle in an array manner, and the lower plate surface of the substrate (2) is provided with substrate anti-displacement lugs (6) in an array manner; the substrate anti-displacement bump (2.8) is pyramid-shaped, and the depth of the trapezoidal groove is smaller than the height of the substrate anti-displacement bump (2.8); and a base plate lifting ring (2.6) is arranged at the center of the upper plate surface of the base plate (2).
7. The heavy-duty long-life road structure of claim 1, wherein: the two sides of the substrate (2) and the asphalt pavement layer (3) are provided with road shoulders (4); and a separation pier (5) is arranged in the middle of the asphalt pavement layer (3).
8. The heavy-duty long-life road structure of claim 1, wherein: the base plate (2) is a prefabricated part and is produced in a cement product prefabrication plant; the inside steel reinforcement cage that is provided with of base plate (2) is made through prefabricated mould through cement mortar pouring, maintenance.
9. A construction method of a heavy-load long-life road is characterized by comprising the following steps: the construction site of the heavy-load long-life highway is subjected to the following construction processes:
s1, roadbed construction: after the roadbed construction is finished, lime lattice drawing and line drawing are carried out;
s2, substrate construction: when the base plate (2) is constructed, the construction direction is carried out against the driving direction of the vehicle; marking lines according to lime grids during roadbed construction, and hanging the base plate (2) by a crane and placing the base plate on the finished roadbed; assisting optical measurements while laying down the first substrate (2) to ensure positional placement accuracy of the first substrate (2);
performing optical measurement calibration once every five substrates (2) are laid and constructed subsequently; after the previous substrate (2) is placed, pouring a compression joint plate buffer layer (6) on the upper surface of the compression joint plate (2.1) under the substrate of the previous substrate (2) by using asphalt pouring equipment on the previous substrate (2), wherein the pouring temperature is 170-190 ℃; after the compression joint plate buffer layer (6) is poured, a crane is used for hoisting the next substrate (2); the upper substrate pressing plate (2.3) of the next substrate (2) is pressed on the upper part of the lower substrate pressing plate (2.1) of the previous substrate (2), and the substrate butt joint (2.4) at the end part of the upper substrate pressing plate (2.3) of the next substrate is correspondingly arranged in the substrate butt joint groove (2.2) at the end part of the previous substrate (2); the substrate butt joint (2.4) at the end part of the pressure welding plate (2.3) on the next substrate is abutted with the substrate telescopic block (2.5) of the substrate butt joint groove (2.2) at the end part of the next substrate (2), and a dilatation joint between the substrate butt joint (2.4) of the two substrates (2) and the substrate butt joint groove (2.2) is naturally formed;
after the hoisting of the next substrate (2) is finished, filling expansion and shrinkage joint filler (8) between expansion and shrinkage joints of the two substrates (2) by using asphalt pouring equipment, wherein the pouring temperature is 170-190 ℃; for the parallel expansion and contraction joint, the filling height of the expansion and contraction joint filler (8) is flush with the upper end surface of the substrate (2); before filling the expansion and contraction joint filler (8), blowing and dedusting the expansion and contraction joint;
repeatedly rolling the paved substrate (2) for more than five times by using a load-carrying truck with the total weight of 50-60 tons while paving the substrate (2);
s3, construction of a road shoulder (4): digging a road shoulder groove along the outer side of the paved substrate (2) by using a grooving machine, then arranging a road shoulder (4) along the road shoulder groove, backfilling and fixing, and pointing by using cement mortar;
s4, constructing an asphalt pavement layer (3): the construction of the asphalt pavement layer (3) is carried out along the running direction of the vehicle; after the construction of the road shoulder (4) is finished, blowing residual floating soil on the upper surface of the substrate (2); spraying bonding asphalt on the upper surface of the substrate (2); paving an asphalt pavement material, and flattening the asphalt pavement material by using a vibratory roller to form an asphalt pavement layer (3);
s5, setting a hard shoulder: arranging a separation pier (5) in the middle of the asphalt pavement layer (3) according to a set spacing distance;
s6, initial maintenance of the asphalt pavement layer (3): after the construction of the heavy-load long-life highway is completed, the traffic can be opened after the asphalt pavement layer (3) is completely and naturally cooled to the room temperature; controlling the speed not to exceed 30km/h at the initial stage of open traffic, determining the time according to the actual traffic volume and load condition of the road, and keeping the duration for 20-30 days; and strictly forbidding all vehicles to run reversely within the initial curing time of the asphalt pavement layer (3).
10. The construction method of the heavy-duty long-life road according to claim 9, wherein: for the expansion and contraction joint of the V-shaped stress release groove (7), asphalt pouring equipment is used for pouring expansion and contraction joint filler (8), the pouring temperature is 170-190 ℃, and the filling height of the expansion and contraction joint filler (8) is one of the five directions to the four directions of the depth of the V-shaped stress release groove (7); before the filling of the expansion and contraction joint filler (8), the V-shaped stress release groove (7) is purged for dust removal.
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Address after: 471000 building B12, Internet of things innovation and Technology Park, smart workshop, west section of Kaiyuan Avenue, Luolong District, Luoyang City, Henan Province Patentee after: Henan Jingxin Engineering Management Consulting Co.,Ltd. Address before: 471000 building B12, Internet of things innovation and Technology Park, smart workshop, west section of Kaiyuan Avenue, Luolong District, Luoyang City, Henan Province Patentee before: Henan Jingxin Engineering Supervision Co.,Ltd. |