CN111304993A - Road surface adds muscle structure - Google Patents
Road surface adds muscle structure Download PDFInfo
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- CN111304993A CN111304993A CN202010186639.9A CN202010186639A CN111304993A CN 111304993 A CN111304993 A CN 111304993A CN 202010186639 A CN202010186639 A CN 202010186639A CN 111304993 A CN111304993 A CN 111304993A
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- rigid base
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/16—Reinforcements
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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
- E01C3/04—Foundations produced by soil stabilisation
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a road surface reinforcement structure, which comprises: the waterproof asphalt pavement layer comprises a water-permeable asphalt surface layer, a lower sealing layer and a plurality of semi-rigid base layers, wherein a layer of geonet is arranged between every two adjacent semi-rigid base layers, the quantity of all the geonets is at least two, and an auxiliary positioning piece for assisting in positioning the position of the geonet is arranged on each geonet. And paving an Nth semi-rigid base layer, paving a layer of geonet by adopting a full-paving method, using an auxiliary positioning piece for auxiliary positioning, and arranging a lower sealing layer between the lower surface of the water-permeable asphalt surface layer and the upper surface of the topmost semi-rigid base layer. Laying an M layer of semi-rigid base layer and laying a second layer of check net. If necessary, the laying process can be repeated until the semi-rigid base layer is constructed. The invention can reduce fatigue, reflection, temperature and uneven settlement crack diseases, greatly prolong the service life of the pavement and prolong the maintenance period, so that the cost of the whole life cycle of the pavement is lower than that of the pavement without ribs.
Description
Technical Field
The invention relates to the technical field of road engineering, in particular to a pavement reinforcement structure.
Background
Pavement cracks caused by comprehensive influences of load and environment become one of the most main structural damage forms of asphalt pavements. The presence of cracks destroys the structural integrity and continuity of the pavement and leads to a weakening of the structural strength to some extent. Under the effect of external forces, the pavement cracks can be rapidly expanded, and the roadbed body is damaged after rainwater infiltrates and elutriates, so that the service quality and the service life of the highway are greatly influenced.
The method for treating pavement cracking usually adopts geotextile and geogrid to carry out reinforcement treatment. Typically at the interface between the asphalt layer and its underlying layers (e.g., the interface of the semi-rigid base layer and the asphalt overlay). The geotechnical reinforcement material is applied to treat the asphalt pavement and prevent the pavement from cracking, and the constructed test road cannot achieve the treatment effect. Because the reinforced parts are different, the arrangement position of the reinforcing materials in the pavement structure has the effect, the existing reinforced part is usually the bottom of the pavement surface layer, and the treatment effect cannot be achieved through the practical application verification. In addition, the type of the rib material adopted by the geotechnical reinforcement material influences the bonding state with the structural layer and influences the bonding effect. Compared with geonets and geogrids, the geofabric without holes and lacking an embedding mechanism is inevitably different in bonding degree with a structural layer, and the pavement cracking cannot be treated due to poor bonding effect. In the construction of applying the geotechnical reinforcement material to treat the asphalt pavement, although people adopt various methods to ensure the connection of the geotechnical reinforcement material and the structural layer, such as coating adhesive layer oil on or soaking asphalt oil in advance on or under geotechnical cloth, or adopting a material with self-adhesive property to clean the surface of the semi-rigid base layer, when the geotechnical reinforcement material is paved on the top surface of the semi-rigid base layer, the geotechnical reinforcement material can still be pushed and folded under the conditions of asphalt mixture paving and rolling of a road roller, so that the geotechnical reinforcement material cannot be fully bonded with the upper structural layer and the lower structural layer. In addition, although this treatment reduces the reflection cracks of the asphalt pavement to some extent, it cannot prevent the semi-rigid base layer from shrinkage cracking, and is a treatment method that is not a permanent measure.
In summary, how to provide a pavement reinforcement structure for effectively treating pavement cracking is a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention provides a pavement reinforcement structure, which can effectively treat pavement cracking.
In order to achieve the above purpose, the invention provides the following technical scheme:
a pavement reinforcing structure comprising: water permeability pitch surface course, lower seal and a plurality of semi-rigid basic unit, it is adjacent be equipped with one deck geotechnological net between the semi-rigid basic unit, all the quantity of geotechnological net is at least two-layer, be equipped with the auxiliary positioning spare that is used for auxiliary positioning geotechnological net position on the geotechnological net, lower seal set up in below and the top layer of water permeability pitch surface course between the higher authority of semi-rigid basic unit.
Preferably, the geonet is a check net.
Preferably, the auxiliary positioning member comprises a transverse fixing rod which is parallel to the net surface of the check net and is arranged on the net surface of the check net.
Preferably, the length direction of the transverse fixing rod is perpendicular to the twisted edge of the check net.
Preferably, the auxiliary positioning member further comprises a U-shaped ground nail for fixing the periphery of the check net to the semi-rigid base layer.
Preferably, the number of the transverse fixing rods is at least two, and the adjacent transverse fixing rods are arranged in parallel at a preset distance.
Preferably, all of said transverse fixing bars are arranged in the same plane.
The invention provides a pavement reinforcement structure, which comprises: the semi-rigid base course of water permeability pitch surface course, lower seal and a plurality of semi-rigid base course are equipped with one deck geotechnological net between the adjacent semi-rigid base course, and the quantity of all geotechnological nets is at least two-layer, is equipped with the auxiliary positioning piece that is used for auxiliary positioning geotechnological net position on the geotechnological net, and lower seal sets up below the pitch surface course of water permeability and between the top of the semi-rigid base course of top layer.
During construction, a lower bearing layer is prepared, and the elevation, the cross slope, the width, the compaction degree and the flatness of the lower bearing layer such as a roadbed or a cushion layer are checked. And then measuring and lofting, arranging indication piles on two sides of the road, and constructing design elevations at marked positions on the piles. Determining the appropriate layer thickness of the layered construction according to the design thickness of the base layer, a compacting machine and the like, paving an Nth semi-rigid base layer, paving a layer of geonet by adopting a full-paving method, assisting positioning by using an auxiliary positioning piece, and paving an (N + 1) th semi-rigid base layer on the geonet on the Nth semi-rigid base layer. And laying an M & ltth & gt semi-rigid base layer, laying a layer of check net, and then laying an M & lt +1 & gt semi-rigid base layer on the geotechnical net on the M & ltth & gt semi-rigid base layer. If necessary, the laying process can be repeated until the semi-rigid base layer is constructed. The construction method of the lower seal layer and the asphalt surface layer is the same as that of the common asphalt pavement, and the detailed description is omitted here.
The invention can reduce fatigue, reflection, temperature and uneven settlement crack diseases, thereby greatly prolonging the service life of the pavement and prolonging the maintenance period, so that the cost of the whole life cycle of the pavement is lower than that of the pavement without ribs. The invention can solve the following problems in the road surface engineering: damage to the substrate; reflecting cracks on the pavement; uneven settlement of the pavement; the overall strength of the pavement is insufficient; too large thickness of the pavement structure layer, etc.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of a pavement reinforcement structure provided by the present invention;
FIG. 2 is a schematic diagram of a check-up net provided by the present invention;
FIG. 3 is a schematic view of a U-shaped ground nail provided by the present invention.
In FIGS. 1-3:
1-water-permeable asphalt surface layer, 2-lower sealing layer, 3-semi-rigid base layer, 4-check net and 5-U-shaped ground nail.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide a pavement reinforcement structure, which can effectively treat pavement cracking.
Referring to fig. 1 to 3, fig. 1 is a cross-sectional view of a pavement reinforcement structure provided by the present invention; FIG. 2 is a schematic diagram of a check-up net provided by the present invention; FIG. 3 is a schematic view of a U-shaped ground nail provided by the present invention.
A pavement reinforcing structure comprising: the semi-rigid base layer 3 of one deck geotechnological net is equipped with between the adjacent semi-rigid base layer 3 to water permeability pitch surface course 1, lower seal 2 and a plurality of semi-rigid base layer, and the quantity of all geotechnological nets is at least two-layer, is equipped with the auxiliary positioning spare that is used for auxiliary positioning geotechnological net position on the geotechnological net, and lower seal 2 sets up below water permeability pitch surface course 1 and between the higher authority of the semi-rigid base layer 3 of top layer.
The cement selected in the construction can be ordinary portland cement, preferably a product with initial setting time of more than 3 hours and final setting time of more than 6 hours, and the strength is 32.5MPa or 42.5 MPa. The lime is preferably ground quicklime powder. Quicklime lumps should be eliminated sufficiently and a certain humidity should be maintained, neither dust raising nor over-wetting agglomeration can be generated. In fly ash, SiO2、Al2O3、Fe2O3The content is more than 70 percent, and the ignition loss is not more than 20 percent. The grading composition, strength, crushing value, maximum grain size and the like meet the standard requirements, and when the high-speed highway base layer is used, the maximum grain size does not exceed 31.5 mm. When stable fine soil is selected, the plasticity index, the organic matter content and the sulfate content of the stable fine soil meet the standard requirements, and the maximum particle size is not more than 15 mm.
When various types of base courses are selected as the semi-rigid base course 3, the cement-stabilized graded broken stones or gravels can be used as the base course and the subbase course of all levels of pavements, but the cement-stabilized fine grained soil cannot be used as the base course of two or more levels of highway pavements. The lime-stabilized graded broken stones or gravels can be used as base courses and subbase courses of all levels of pavements, but the lime-stabilized fine grained soil cannot be used as base courses of two or more levels of highway pavements. The cement/lime fly ash stable graded broken stone or gravel can be used as a base course and a subbase course of all levels of pavements, but the second ash, the second ash fine soil and the second ash sand can not be used as the base course of the second level or above highway pavements.
The following construction methods can be selected according to the road grade: the roads below the second level are constructed by adopting a road mixing method; the second level highway can be constructed by adopting a road mixing method or a centralized plant mixing method; the subbase of high-speed or first-level highway is directly paved on the soil foundation by adopting a road mixing method, and the subbase construction and the base construction of the soil foundation which are treated by curing agent or lime are paved by adopting a centralized plant mixing method in combination with a paver.
During construction, a lower bearing layer is prepared, and the elevation, the cross slope, the width, the compaction degree and the flatness of the lower bearing layer such as a roadbed or a cushion layer are checked. And then measuring and lofting, arranging indication piles on two sides of the road, and constructing design elevations at marked positions on the piles. Determining the appropriate layer thickness of the layered construction according to the design thickness of the base layer, a compacting machine and the like, paving an Nth semi-rigid base layer 3, then paving a layer of geonet by adopting a full-paving method, utilizing an auxiliary positioning piece for auxiliary positioning, and then paving an N +1 th semi-rigid base layer 3 on the geonet on the Nth semi-rigid base layer 3. Laying an M layer of semi-rigid base layer 3, laying a layer of check net 4, and then laying an M +1 layer of semi-rigid base layer 3 on the geotechnical net on the M layer of semi-rigid base layer 3. If necessary, the laying process can be repeated until the semi-rigid base layer 3 is constructed. The construction method of the lower seal layer 2 and the asphalt surface layer is the same as that of a common asphalt pavement, and the description is omitted here.
The N layer and the M layer of semi-rigid base layer 3 in this application can be the semi-rigid base layer 3 of adjacent setting, also can be non-adjacent semi-rigid base layer 3, can carry out laying of geotechnological net in specific layer according to actual conditions.
When adjacent geonets are lapped, the longitudinal and transverse lapping widths are not less than 5 cm. The steel wire twisting part of the geonet can be subjected to special anti-corrosion coating treatment, and the steel wires of the adjacent geonets are twisted to connect edges.
The invention can reduce fatigue, reflection, temperature and uneven settlement crack diseases, thereby greatly prolonging the service life of the pavement and prolonging the maintenance period, so that the cost of the whole life cycle of the pavement is lower than that of the pavement without ribs. The invention can solve the following problems in the road surface engineering: damage to the substrate; reflecting cracks on the pavement; uneven settlement of the pavement; the overall strength of the pavement is insufficient; too large thickness of the pavement structure layer, etc.
On the basis of the above embodiment, as a further preferable example, the geonet is a check net 4.
It should be noted that, the check net 4 is a twisted hexagonal metal net, and when the inorganic binder is used as the semi-rigid pavement base layer 3, the maximum particle size of the aggregate is not more than 30mm, so that the aggregate can be well embedded in the check net 4 to realize the sufficient engagement of the two. The check net 4 can effectively absorb and reduce the tensile stress of the semi-rigid material due to the shrinkage of the base layer. At the same time, the mesh structure can provide lateral restraint, thereby improving the resistance of the pavement to rutting and pushing.
In addition to the above-described embodiments, it is further preferable that the auxiliary positioning member includes a lateral fixing bar which is parallel to the net surface of the check net 4 and is provided on the net surface of the check net 4. It should be noted that the number of the transverse fixing rods can be set according to practical application conditions, in order to facilitate the placement and fixation of the check net 4 in construction, a plurality of transverse fixing rods can be woven into the metal net at certain intervals, and the transverse fixing rods are only required to be fully unfolded, flattened and fixed when the base layer is laid in layers. The transverse fixing rod can be a metal rod, and is good in stability and not easy to bend. The transverse fixing rod is simple in structure and convenient to process and install.
In addition to the above embodiments, it is further preferable that the longitudinal direction of the transverse fixing bar is perpendicular to the twisted side of the lattice net 4. The strength of the check net 4 can be improved by adopting the structure provided by the embodiment, so that the check net 4 is firmer.
On the basis of the above embodiment, it is further preferable that the auxiliary positioning member further includes a U-shaped ground nail 5 for fixing the periphery of the check net 4 to the semi-rigid substrate 3. It should be noted that the size of the U-shaped ground nail 5 may be 8 to 10cm on a single side, and the number may be selected according to the actual situation, and after fixing one side of the check net 4 by using a plurality of U-shaped ground nails 5, the other sides are fixed.
On the basis of the above embodiment, as a further preference, the number of the transverse fixing rods is at least two, and the adjacent transverse fixing rods are arranged in parallel with a preset distance. It should be noted that the parallel arrangement can facilitate the auxiliary positioning of the check net 4, and the position fixation between the parallel arranged transverse fixing rods can ensure that the transverse fixing rods are arranged at the preset position, and is favorable for unfolding the check net 4.
In addition to the above embodiments, it is further preferable that all the lateral fixing bars are disposed in the same plane. It should be noted that the check net 4 has two sides, and all the transverse fixing rods are arranged in the same plane, that is, all the transverse fixing rods are arranged on the net surface on the same side of the check net 4, so that the check net 4 is laid more smoothly, and the stable installation of the check net 4 is facilitated.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The road surface reinforcement structure provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. A road surface adds muscle structure which characterized in that includes: water permeability pitch surface course (1), lower seal (2) and a plurality of semi-rigid basic unit (3), it is adjacent be equipped with one deck geotechnological net between semi-rigid basic unit (3), all the quantity of geotechnological net is at least two-layer, be equipped with the auxiliary positioning piece that is used for auxiliary positioning geotechnological net position on the geotechnological net, lower seal (2) set up in below and the top layer of water permeability pitch surface course (1) between the higher authority of semi-rigid basic unit (3).
2. A pavement reinforcing structure according to claim 1, characterized in that said geonet is a check net (4).
3. The road surface stiffening structure according to claim 2, wherein the auxiliary positioning member comprises a transverse fixing rod parallel to the mesh surface of the check net (4) and arranged on the mesh surface of the check net (4).
4. The road surface reinforcement structure according to claim 3, wherein the length direction of the transverse fixing bars is perpendicular to the twisted side of the check net (4).
5. The road surface reinforcement structure according to claim 3, wherein the auxiliary positioning member further comprises a U-shaped ground nail (5) for fixing the periphery of the check net (4) to the semi-rigid base layer (3).
6. The road surface reinforcement structure according to claim 5, wherein the number of the transverse fixing rods is at least two, and the adjacent transverse fixing rods are arranged in parallel with a preset distance therebetween.
7. The road surface reinforcing structure according to claim 6, wherein all the transverse fixing bars are arranged in the same plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010186639.9A CN111304993A (en) | 2020-03-17 | 2020-03-17 | Road surface adds muscle structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010186639.9A CN111304993A (en) | 2020-03-17 | 2020-03-17 | Road surface adds muscle structure |
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| CN111304993A true CN111304993A (en) | 2020-06-19 |
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| CN202010186639.9A Pending CN111304993A (en) | 2020-03-17 | 2020-03-17 | Road surface adds muscle structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250661A (en) * | 2021-12-17 | 2022-03-29 | 绍兴市城投再生资源有限公司 | Prestressed reinforced stable fine grained soil base layer and construction method and device thereof |
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| CN105386382A (en) * | 2015-10-10 | 2016-03-09 | 重庆建工住宅建设有限公司 | Construction method for semi-rigid base asphalt pavement fiber-reinforced under-sealed layer |
| CN110042715A (en) * | 2019-04-29 | 2019-07-23 | 杭州悦为科技有限公司 | The construction method of the hard and soft combination soil stabilization system of Abutment Back |
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| CN201952698U (en) * | 2011-03-07 | 2011-08-31 | 冯守中 | Roadbed structure reinforced by geotextile discrete material piles |
| CN102953308A (en) * | 2012-05-17 | 2013-03-06 | 湖南大学 | Construction method of bamboo wood reinforcement bidirectional enhanced part-cut and part-fill weak roadbed |
| CN203821187U (en) * | 2014-04-03 | 2014-09-10 | 中国水电顾问集团贵阳勘测设计研究院有限公司 | Penn's cage composite roadbed structure |
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| CN104631474A (en) * | 2015-03-09 | 2015-05-20 | 深圳市红树林园林绿化工程有限公司 | Slope protection and afforestration structure |
| CN204551491U (en) * | 2015-03-09 | 2015-08-12 | 深圳市红树林园林绿化工程有限公司 | A kind of side slope protection greening structure |
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Cited By (2)
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| CN114250661A (en) * | 2021-12-17 | 2022-03-29 | 绍兴市城投再生资源有限公司 | Prestressed reinforced stable fine grained soil base layer and construction method and device thereof |
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