CN110409244B - Composite bearing prefabricated road slab and prefabricated pavement construction method - Google Patents
Composite bearing prefabricated road slab and prefabricated pavement construction method Download PDFInfo
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- CN110409244B CN110409244B CN201910782599.1A CN201910782599A CN110409244B CN 110409244 B CN110409244 B CN 110409244B CN 201910782599 A CN201910782599 A CN 201910782599A CN 110409244 B CN110409244 B CN 110409244B
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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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/52—Apparatus for laying individual preformed surfacing elements, e.g. kerbstones
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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
- E01C5/00—Pavings made of prefabricated single units
- E01C5/06—Pavings made of prefabricated single units made of units with cement or like binders
- E01C5/08—Reinforced units with steel frames
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
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- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a composite bearing prefabricated road slab and a prefabricated pavement construction method. Processing a composite bearing prefabricated road slab; rolling and tamping the original soil layer; paving a leveling layer on the original soil layer and tamping; hoisting the molded composite bearing prefabricated road panel to a construction road section and installing the composite bearing prefabricated road panel in place, fitting a primary static pressure with a leveling layer, and caulking the two adjacent composite bearing prefabricated road panels through waterproof mortar; drilling holes in the conical pile head holes in the composite bearing prefabricated road slab from top to bottom by using a small-sized drilling machine, and forming pillar pile pouring holes after soil is removed; and pouring concrete downwards through the upper part of the conical pile head hole until the concrete fills the inner cavities of the pillar pile pouring hole and the conical pile head hole, so as to form the pillar pile. The overall bearing capacity of the pavement slab is improved, and the adverse effect of the subsidence subgrade on the pavement is reduced; the integral connectivity of the prefabricated pavement and the base layer is enhanced, the lateral horizontal slippage of the prefabricated pavement is reduced, and the integral stability of the roadbed and the pavement is improved.
Description
Technical Field
The invention relates to a composite bearing prefabricated road slab and a prefabricated pavement construction method.
Background
The prefabricated road surface is a road surface of which a surface layer is paved by cement concrete prefabricated blocks, and the prefabricated road mainly has two problems in the using process. Receive prefabricated road surface itself to assemble the shaping, wholly combine not well with the road bed, seal not tight, require high to the road matrix volume, later stage is along with road bed rainwater infiltration and inhomogeneous settlement scheduling problem, takes place the perk not smooth problem very easily. Resulting in cracking and breaking of the prefabricated pavement and the like. The requirement of the stability of the long-term load of the road cannot be met. Thereby causing difficulty in the popularization of the prefabricated road.
Disclosure of Invention
The invention aims to provide a composite bearing prefabricated road deck capable of bearing through a roadbed and a pillar pile in a composite mode, and the composite bearing prefabricated road deck is used for solving the technical problem that the load stability of the existing prefabricated road is influenced by the fact that a prefabricated road surface is tilted and cracked due to the fact that the roadbed is permeated by rainwater and unevenly settled; the invention also aims to provide a construction method of the prefabricated pavement using the composite bearing prefabricated pavement slab.
The technical scheme of the composite bearing prefabricated road slab is realized as follows: the composite bearing prefabricated road slab comprises a rectangular road surface body and a reinforcing steel bar frame positioned in the road surface body, wherein a plurality of pre-buried hook bolts are uniformly distributed on the upper part of the road surface body, the lower parts of the pre-buried hook bolts are fixedly welded with the reinforcing steel bar frame, a plurality of conical pile head holes which are small in size up and down are uniformly distributed on the road surface body so as to be matched with an axial top support and radial limiting matching of a reinforced concrete support pile poured in a roadbed, and a demolding layer which is convenient to separate from the reinforced concrete support pile when the demolding is carried out is arranged on the inner wall of each conical pile head hole.
On the basis of the scheme, the method is further improved in the following mode, wherein the demolding layer is a demolding agent layer which is brushed or a pre-buried PVC mold.
On the basis of the scheme, the diameter of the uppermost edge of the conical pile head hole is not less than 80mm, and the diameter of the lowermost edge of the conical pile head hole is 2-4 times of the diameter of the uppermost edge.
On the basis of the scheme, the thickness of the pavement body is further improved to be 20 mm.
On the basis of the scheme, the distance between any two adjacent conical pile head holes is 1 m.
The technical scheme of the construction method of the prefabricated pavement is realized as follows: the construction method of the prefabricated pavement comprises the following steps:
s1, processing the composite bearing prefabricated pavement slab, placing a steel bar frame in a mould, uniformly welding a plurality of pre-embedded hook bolts on the steel bar frame, arranging conical moulds with release agents coated on the outer surfaces in the mould at intervals, pouring concrete, condensing and then detaching the conical moulds;
s2, flattening the original soil layer of the construction road section, and then rolling and tamping;
s3, paving sand, lime soil and cement on the original soil layer to form a leveling layer, and tamping after leveling;
s4, hoisting the molded composite bearing prefabricated road panels to a construction road section and installing the composite bearing prefabricated road panels in place, fitting the composite bearing prefabricated road panels with a leveling layer by preliminary static pressure, and caulking the adjacent composite bearing prefabricated road panels by waterproof mortar;
s5, drilling holes in the conical pile head holes on the composite bearing prefabricated road slab from top to bottom by using a small-sized drilling machine, and forming pillar pile pouring holes after soil is removed;
and S6, pouring concrete downwards through the upper part of the conical pile head hole until the concrete fills the inner cavities of the pillar pile pouring hole and the conical pile head hole to form the pillar pile.
On the basis of the scheme, the method is further improved in that before S6, reinforcing steel bars are placed in the post pile pouring holes.
On the basis of the scheme, the method is further improved in the following way that when the composite bearing prefabricated road slab is dismantled, the composite bearing prefabricated road slab is lifted by embedding the hook bolts.
On the basis of the scheme, the method is further improved in that before S6, a release agent is coated on the inner wall of each conical pile head hole or a PVC mold is pre-buried.
By adopting the technical scheme, the invention has the beneficial effects that: according to the invention, the prefabricated road slab is provided with the plurality of conical pile head holes so as to be matched with the support piles penetrating into the roadbed through the conical surface, and the conical surface is utilized for accurate limiting. The prefabricated pavement slab adopts a roadbed and support piles combined bearing system, so that the overall bearing capacity of the pavement slab is improved, and the adverse effect of a settled roadbed on the pavement is reduced; the road deck adopts the cast-in-place support piles, so that the integral connectivity of the prefabricated road surface and the base layer is enhanced, and the lateral horizontal slippage of the prefabricated road surface is reduced; the prefabricated road deck construction system is simple to install and disassemble and convenient and fast to construct; the prefabricated road slab can be repeatedly circulated, so that the cost is saved, and the prefabricated road slab is green and environment-friendly; through the pillar pile hole, carry out the secondary slip casting to road deck board and road bed gap, improved the overall stability on road bed and road surface.
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, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a raw soil layer after flattening, rolling and tamping;
FIG. 2 is a schematic structural diagram of a leveling layer compacted on a raw soil layer;
FIG. 3 is a schematic view of the structure after the prefabricated pavement slab is installed on the leveling layer;
FIG. 4 is a schematic structural view of a small-sized drilling machine drilling and clearing a pillar pile pouring hole;
FIG. 5 is a schematic structural view of a post pile formed after pouring;
FIG. 6 is a schematic view of the prefabricated road deck being lifted and removed;
FIG. 7 is a schematic view of the internal structure of a prefabricated road deck;
wherein: 1-original soil layer, 2-leveling layer, 3-prefabricated road panel, 31-pavement body, 32-reinforcing steel bar frame, 33-embedded hook bolt, 34-conical pile head hole, 35-demoulding layer, 4-pillar pile pouring hole, 5-pillar pile, 51-reinforcing steel bar and 6-small drilling machine.
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 concrete embodiment of the construction method of the prefabricated pavement comprises the following steps:
s1, as shown in fig. 7, processing the composite load-bearing prefabricated pavement slab 3, placing the steel bar frames 32 in the mold, uniformly welding a plurality of pre-embedded hook bolts 33 on the steel bar frames 32, arranging conical molds with release agents coated on the outer surfaces in the mold at intervals, pouring concrete, condensing, and then detaching the conical molds; the composite bearing prefabricated pavement slab 3 comprises a rectangular pavement body 31 and a reinforcing steel bar frame 32 positioned in the pavement body 31, a plurality of embedded hook bolts 33 are uniformly distributed on the upper part of the pavement body 31, the lower parts of the embedded hook bolts 33 are fixedly welded with the reinforcing steel bar frame 32, a plurality of conical pile head holes 34 which are small at the upper part and big at the lower part are uniformly distributed on the pavement body 31 so as to be matched with the axial jacking and radial limiting of reinforced concrete support piles 5 poured in a roadbed, and a demoulding layer 35 which is convenient to separate from the reinforced concrete support piles 5 when being dismantled is arranged on the inner wall of each conical pile head hole 34. The demoulding layer 35 is a demoulding agent layer which is coated or a pre-buried PVC mould. The diameter of the uppermost edge of the conical pile head hole 34 is not less than 80mm, and the diameter of the lowermost edge of the conical pile head hole 34 is 2-4 times of the diameter of the uppermost edge. The thickness of the pavement body 31 is 20 mm. The distance between any two adjacent conical pile head holes 34 is 1 meter.
S2, as shown in figure 1, flattening the original soil layer 1 of the construction road section, and then rolling and tamping;
s3, paving sand, lime soil and cement on the original soil layer 1 to form a leveling layer 2, and tamping after leveling, as shown in figure 2;
s4, as shown in figure 3, hoisting the molded composite load-bearing prefabricated road panels 3 to a construction road section and installing the same in place, fitting the leveling layer 2 with preliminary static pressure, and caulking the two adjacent composite load-bearing prefabricated road panels 3 through waterproof mortar;
s5, as shown in figure 4, drilling each conical pile head hole 34 on the composite bearing prefabricated road panel 3 from top to bottom by using a small-sized drilling machine 6, and forming a post pile pouring hole 4 after soil removal;
s6, as shown in fig. 5, pouring concrete downwards through the upper part of the conical pile head hole 34 until the concrete fills the inner cavities of the post pile pouring hole 4 and the conical pile head hole 34, so as to form the post pile 5.
Before S6, the reinforcing bars 51 are placed in the post pile casting holes 4. As shown in fig. 6, when the composite load-bearing prefabricated road slab 3 is removed, the composite load-bearing prefabricated road slab is lifted by embedding the hook bolts 33. Before S6, a release agent or a pre-buried PVC mold is coated on the inner wall of each conical pile head hole 34.
Specifically, the concrete size of the prefabricated pavement slab 3 can be designed according to the width of the road, and the thickness and the reinforcing bars of the pavement slab can be designed according to the bearing requirements of the pavement. The thickness of the temporary road prefabricated pavement slab 3 on a general construction site is 20mm, the reinforcing bars are C12@200mm double-layer bidirectional, and the thickness of the protective layer is 25 mm. The lower part of the road slab is provided with conical molds with the distance of 1 meter. The spacing may be adjusted according to the actual application. And hoisting bolts are embedded at four corners of the pavement slab. After the road deck plate is poured and molded, the top circular hole is not less than 8 centimeters, the bottom circular diameter is not less than 2 times of the top and not more than 4 times, and the road deck plate is convenient to remove in the later period. The hole 4 is pour to the stake that prefabricated pavement slab 3 left, adopts mushroom circular cone shape hole design, and big end down, hole lateral wall scribble drawing of patterns isolating agent or pre-buried PVC membrane, had both satisfied the integral connection of pavement slab and fender pile. But also ensures the possibility of later hoisting and dismantling.
The specific embodiment of the composite load-bearing prefabricated road slab of the invention is the same as the specific embodiment of the prefabricated road slab in the specific embodiment of the prefabricated pavement construction method of the invention, and the detailed description is omitted.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The composite bearing prefabricated pavement slab is characterized by comprising a rectangular pavement body and a reinforcing steel bar frame positioned in the pavement body, wherein a plurality of pre-embedded hook bolts are uniformly distributed on the upper part of the pavement body, the lower parts of the pre-embedded hook bolts are welded and fixed with the reinforcing steel bar frame, a plurality of conical pile head holes which are small in top and large in bottom are uniformly distributed on the pavement body so as to be matched with reinforced concrete support piles poured in a roadbed in an axial jacking manner and in a radial limiting manner, and a demolding layer which is convenient to be separated from the reinforced concrete support piles during dismantling is arranged on the inner wall of each conical pile head hole; the prefabricated road slab is provided with a plurality of conical pile head holes so as to be matched with the support piles punctured into the roadbed through the conical surfaces, and the conical surfaces are utilized for accurate limiting; the prefabricated pavement adopts a roadbed and pillar pile combined bearing system, so that the overall bearing capacity of the pavement slab is improved; the cast-in-place support column piles are adopted, the overall connectivity of the prefabricated pavement and the base course is enhanced, and the lateral horizontal slippage of the prefabricated pavement is reduced.
2. The composite load-bearing precast pavement slab of claim 1, wherein the release layer is a painted release layer or a pre-buried PVC mold.
3. The composite load-bearing precast road slab according to claim 1 or 2, wherein the diameter of the uppermost edge of the tapered pile head hole is not less than 80mm, and the diameter of the lowermost edge of the tapered pile head hole is 2-4 times the diameter of the uppermost edge.
4. The composite load-bearing precast pavement slab of claim 3, wherein the pavement body has a thickness of 20 mm.
5. The composite load-bearing precast road panel of claim 3, wherein the distance between any two adjacent conical pile head holes is 1 m.
6. The construction method of the prefabricated pavement is characterized by comprising the following steps of:
s1, processing the composite bearing prefabricated pavement slab, placing a steel bar frame in a mould, uniformly welding a plurality of pre-embedded hook bolts on the steel bar frame, arranging conical moulds with release agents coated on the outer surfaces in the mould at intervals, pouring concrete, condensing and then detaching the conical moulds;
the composite bearing prefabricated pavement slab comprises a rectangular pavement body and a reinforcing steel bar frame positioned in the pavement body, wherein a plurality of pre-embedded hook bolts are uniformly distributed on the upper part of the pavement body, the lower parts of the pre-embedded hook bolts are welded and fixed with the reinforcing steel bar frame, a plurality of conical pile head holes which are small in top and large in bottom are uniformly distributed on the pavement body so as to be matched with reinforced concrete support piles poured in a roadbed in an axial jacking and radial limiting manner, and a demoulding layer which is convenient to separate from the reinforced concrete support piles during dismantling is arranged on the inner wall of each conical pile head hole;
s2, flattening the original soil layer of the construction road section, and then rolling and tamping;
s3, paving sand, lime soil and cement on the original soil layer to form a leveling layer, and tamping after leveling;
s4, hoisting the molded composite bearing prefabricated road panels to a construction road section and installing the composite bearing prefabricated road panels in place, fitting the composite bearing prefabricated road panels with a leveling layer by preliminary static pressure, and caulking the adjacent composite bearing prefabricated road panels by waterproof mortar;
s5, drilling holes in the conical pile head holes on the composite bearing prefabricated road slab from top to bottom by using a small-sized drilling machine, and forming pillar pile pouring holes after soil is removed;
and S6, pouring concrete downwards through the upper part of the conical pile head hole until the concrete fills the inner cavities of the pillar pile pouring hole and the conical pile head hole to form the pillar pile.
7. The precast pavement construction method according to claim 6, wherein reinforcing bars are installed in the post pile casting holes before S6.
8. The precast pavement construction method according to claim 6 or 7, wherein the composite load-bearing precast pavement slab is lifted by embedding hook bolts when being removed.
9. The precast pavement construction method according to claim 6 or 7, wherein a release agent or a pre-buried PVC mold is coated on an inner wall of each tapered pile head hole before S6.
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| CN201910782599.1A CN110409244B (en) | 2019-08-23 | 2019-08-23 | Composite bearing prefabricated road slab and prefabricated pavement construction method |
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| CN201910782599.1A CN110409244B (en) | 2019-08-23 | 2019-08-23 | Composite bearing prefabricated road slab and prefabricated pavement construction method |
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| CN110409244B true CN110409244B (en) | 2021-06-25 |
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| CN112458818B (en) * | 2020-12-08 | 2022-03-08 | 长沙理工大学 | High-comfort assembly type cement concrete pavement repairing structure, construction method and pavement structure overturning device |
| CN113322740B (en) * | 2021-06-25 | 2022-07-26 | 江苏广吴建设园林有限公司 | Reinforced asphalt concrete road and construction method thereof |
| CN114922019B (en) * | 2022-06-30 | 2023-04-28 | 重庆科技学院 | Slope pavement construction method |
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