CN111764216A - Construction method and application of fabricated concrete road plate - Google Patents
Construction method and application of fabricated concrete road plate Download PDFInfo
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- CN111764216A CN111764216A CN202010607353.3A CN202010607353A CN111764216A CN 111764216 A CN111764216 A CN 111764216A CN 202010607353 A CN202010607353 A CN 202010607353A CN 111764216 A CN111764216 A CN 111764216A
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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
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
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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
- E01C9/00—Special pavings; Pavings for special parts of roads or airfields
- E01C9/08—Temporary pavings
- E01C9/086—Temporary pavings made of concrete, wood, bitumen, rubber or synthetic material or a combination thereof
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Abstract
The invention belongs to the technical field of concrete pavements, and particularly relates to a construction method and application of an assembled concrete pavement. The method quickly and neatly completes road construction through six steps of prefabricating a concrete road plate, constructing a foundation base layer, paving a waterproof layer and a sand cushion layer, installing the road plate, treating plate joints, constructing a road shoulder and constructing auxiliary projects. The road plate of the invention adopts factory prefabrication production, is slightly restricted by open weather, has easy guarantee of construction period, adopts uniform standard size, has simple and easy mold manufacture and convenient concrete pouring, is suitable for various roadbeds with certain bearing capacity, is not only suitable for temporary transportation roads and storage yards, but also is very suitable for road construction for emergency rescue and disaster relief. The invention has the advantages of smooth connection of all procedures, centralized construction equipment, less waste during splicing, centralized treatment and very small influence on the environment by field installation.
Description
Technical Field
The invention belongs to the technical field of highway concrete pavements, and particularly relates to a construction method and application of an assembled concrete pavement.
Background
At present, the national requirements for the infrastructure construction meet the requirements of green construction and civilized construction, namely the requirements of the green construction on 'four sections (energy saving, land saving, water saving and material saving)', the 'green construction evaluation standard' and the 'green construction guide rule'.
In the construction of highway projects, the conventional temporary roads and terraces are mostly cast-in-situ concrete at one time. By adopting the method to carry out temporary road construction, the construction period is relatively long, and a large amount of construction waste is generated when the road is dismantled in the later period, so that the resource waste is caused, and the requirements of energy conservation and emission reduction are not met.
Disclosure of Invention
The invention provides a construction method and application of an assembled concrete road board, and aims to provide a road construction method which is capable of paving a progress block, enabling a vehicle to be ready after paving, easy to disassemble and replace after being damaged and capable of being repeatedly used; one of the purposes is to provide a road construction method which has simple process, lower comprehensive cost and less influence on the environment.
In order to achieve the purpose, the invention adopts the technical scheme that:
the construction method of the assembled concrete road plate comprises the following steps
The method comprises the following steps: prefabricating a concrete road plate;
step two: constructing a foundation base layer;
step three: laying waterproof layer and cushion layer
After the second step is finished, paving a waterproof layer on the prepared foundation base layer, and after the waterproof layer is paved, paving a cushion layer on the waterproof layer;
step four: road plate installation
After the third step is finished, transporting the concrete road board prefabricated in the first step to a paving site for splicing;
step five: processing the plate seam;
step six: and constructing the soil shoulder and the accessory engineering.
The precast concrete pavement slab in the step one is manufactured by adopting the following method
The first step is as follows: making a template
Manufacturing a template with the length-width ratio of 1-3 of the precast concrete road board, uniformly coating a release agent on the template, and uniformly and fixedly connecting two connecting hole molds at two ends of the bottom surface of the template along the radial direction;
the second step is that: installing a steel reinforcement framework of the precast concrete road board in the template;
the third step: positioning of hanging parts on steel reinforcement framework
Four hanging pieces are respectively fixed on the upper bottom surface and the lower bottom surface of the steel reinforcement framework, and the four hanging pieces are uniformly and symmetrically arranged on the steel reinforcement framework;
the fourth step: vibrating the concrete;
the fifth step: demoulding turning plate hoisting and health preserving
Turning the prefabricated concrete road board and preserving after the concrete strength reaches 75%; when the temperature is below 30 ℃, a natural gas steam boiler is adopted to heat and maintain the precast concrete road board;
and a sixth step: and (5) storing and secondary health preserving.
The hanging piece comprises a round head hanging nail and a positioning rubber wave; the positioning rubber waves are adhered to the upper part of the round-head hanging nail, and the lower part of the round-head hanging nail is connected with the steel reinforcement framework; the connecting hole die is a cylindrical body consisting of two cylinders with different outer diameters, the outer diameter of the upper part is larger than that of the lower part, and the length of the upper part is smaller than that of the lower part.
The construction method of graded broken stones is adopted in the step of foundation base layer construction, the mixture is formed by mixing 20-30mm broken stones, 10-20mm broken stones, 5-10mm broken stones and stone chips according to the ratio of 15:35:15:35, and the water content in the mixture is 5% -6%.
The waterproof layer laid in the third step adopts waterproof geotextile; the waterproof geotextile is lapped longitudinally and transversely along the slope, and the lapping width is not less than 30 cm.
The sand cushion layer paved in the third step adopts a sand cushion layer paved by a line hanging and gray point method, the thickness of the paved sand cushion layer is 0.5-2.5 cm, and the modulus of the adopted sand is 3.0-2.3.
And the four road boards are installed and leveled by adopting a wire hanging method, and the width of the seam between the concrete road boards is 5-15 mm when the concrete road boards are paved.
The method for treating the plate seams in the fifth step is to fill the plate seams by adopting 3.0-2.3 modulus sand after screening and airing; and finally, performing waterproof plugging on the surface of the plate joint by using rubber asphalt, wherein the plugging thickness is 18-22 mm.
And in the construction of the sixth road shoulder and the auxiliary projects, the two sides of the spliced concrete road slab are provided with macadam ditches along the axial direction of the road.
A construction method of an assembled concrete road board is applied to the construction of temporary roads, terraces and various roads for quick rescue and relief work.
Has the advantages that:
(1) the road plate is produced by factory prefabrication, is slightly restricted by open weather, and has easy guarantee of construction period.
(2) The invention simplifies the procedures into three procedures of prefabrication, transportation and installation, is easy for specialized organization, has controllable quality, neat construction site and rapid on-site assembly.
(3) The road plate of the invention adopts uniform standard size, the mold is easy to manufacture, the concrete pouring is convenient, and the invention is suitable for various roadbeds with certain bearing capacity, is not only suitable for temporary transportation roads and storage yards, but also is very suitable for road construction for emergency rescue and disaster relief.
(4) The invention has the advantages of smooth connection of all procedures, centralized construction equipment, less waste during splicing, centralized treatment and very small influence on the environment by field installation.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to clearly understand the technical solutions of the present invention and to implement the technical solutions according to the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic diagram of the embodiment of the invention after the completion of a normal road section;
FIG. 3 is a schematic illustration of the completion of a high fill section according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of the completion of a curve segment in accordance with an embodiment of the present invention.
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 first embodiment is as follows:
referring to fig. 1, a fabricated concrete pavement slab construction method includes the following steps
The method comprises the following steps: prefabricating a concrete road plate;
step two: constructing a foundation base layer;
step three: laying waterproof layer and sand cushion layer
After the second step is finished, paving a waterproof layer on the prepared foundation base layer, and after the waterproof layer is paved, paving a sand cushion layer on the waterproof layer;
step four: road plate installation
After the third step is finished, transporting the concrete road board prefabricated in the first step to a paving site for splicing;
step five: processing the plate seam;
step six: and constructing the soil shoulder and the accessory engineering.
When the prefabricated concrete road board is actually used, the length and the width of the prefabricated concrete road board are set according to the actual condition, the transportation condition, the load grade and the environment of a construction site of a construction road section, a template is manufactured, a release agent is uniformly coated on the template, and a steel reinforcement framework of the prefabricated concrete road board is installed in the template; then, respectively fixing four hanging pieces on the upper bottom surface and the lower bottom surface of the steel reinforcement framework, wherein the four hanging pieces are uniformly and symmetrically arranged on the steel reinforcement framework for vibrating concrete; and turning the prefabricated concrete road board when the concrete strength reaches 75%. When the temperature is below 30 ℃, a natural gas steam boiler is adopted to heat and maintain the precast concrete road board, so as to improve the production efficiency of the precast concrete road board. And then, the precast concrete road plate is heated and cured by a natural gas steam boiler, the curing time can be effectively shortened by heating and curing the precast concrete road plate by the natural gas steam boiler, and the curing effect is particularly good when the precast concrete of the road plate is precast in winter by adopting the method. And then storing the prefabricated road plate for later use and carrying out secondary health preservation, thereby ensuring that the prefabricated concrete road plate keeps a good quality state. After the foundation base layer is constructed by adopting the method in the prior art, accurate measurement lofting is carried out on the formed and tested roadbed. In order to prevent rainwater on the road surface from infiltrating into the foundation base layer to influence the bearing capacity of the foundation base layer, a waterproof layer is laid in time after the surface of the foundation base layer is cleaned, and the longitudinal and transverse downslope lap joint width of the waterproof layer is not less than 30 cm; a sand cushion layer with the thickness of 3cm is laid on the geotextile by adopting a line hanging and ash point method, the installation quality of the road plate is controlled, the phenomenon that the bottom of the road plate is suspended or the support cushion is not compact is avoided, and the laying quality of the waterproof geotextile is ensured.
And after the sand cushion layer is finished, transporting the precast concrete road board to a construction site, and assembling the precast concrete road board. The road plate has the advantages that lofting and hanging installation must be measured before installation, the bottom of the road plate must be supported and cushioned densely, the width of a plate seam and the height difference of staggered platforms of adjacent plate tops are mainly controlled, the key is to combine the prefabrication quality (thickness and the top surface evenness of a plate surface deformation condition control sand cushion layer) of the road plate, manual matching small machines (agricultural iron rakes and flat rakes) can be used for leveling by a longitudinal and transverse 1 cm-interval gray point method, and meanwhile, the width of the plate seam is controlled by adopting a bamboo plywood. When splicing between the front and the back precast concrete road boards, the front and the back precast concrete road boards are connected through a rectangular steel plate with four screws fixedly connected with the upper surface in a vertical manner, the four screws on the rectangular steel plate are respectively arranged in connecting holes formed in the ends of the front and the back precast concrete road boards, the shockproof gaskets are respectively sleeved on the four screws, the shockproof gaskets are lapped at the circular bead of the connecting holes, then the nuts are screwed, and positioning rubber waves are installed at the ends of the screws of the nuts to be screwed, so that the rainwater on the road surface is prevented from permeating. The rectangular steel plate can be fixed by connecting a 16mm steel plate with M24 high-strength bolts.
After the road boards are assembled, fastening bolts and connecting steel plates in time, and plugging hoisting holes and bolt holes by using foam plugs; filling plate gaps with screened and aired medium and fine sand; and finally, waterproof plugging is carried out on the surface of the slab joint by adopting the special heating and crack pouring equipment for the rubber asphalt in the prior art, so that the rusting and corrosion of hanging nails on the precast concrete road plate and the water trouble of a base layer are prevented.
And after the road plate is installed, road shoulders are timely filled, secondary finishing of the side slopes of the road is timely carried out, shaping of the roadside drainage ditch is carried out, greening is carried out, the isolation barrier is installed, and electromechanical installation is carried out.
The road plate is produced by factory prefabrication, is slightly restricted by open weather, and has easy guarantee of construction period. The invention simplifies the procedures into three procedures of prefabrication, transportation and installation, is easy for specialized organization, has controllable quality, neat construction site and rapid on-site assembly. The road plate of the invention adopts uniform standard size, the mold is easy to manufacture, the concrete pouring is convenient, and the invention is suitable for various roadbeds with certain bearing capacity, is not only suitable for temporary transportation roads and storage yards, but also is very suitable for road construction for emergency rescue and disaster relief. The invention has the advantages of smooth connection of all procedures, centralized construction equipment, less waste during splicing, centralized treatment and very small influence on the environment by field installation.
The pavement paved by the invention meets the following main technical indexes:
(1) natural division: and (II) area.
(2) Design age limit: the prefabricated cement concrete pavement has been fabricated for 3 years.
(3) Standard axle load: BZZ-100.
(4) The cement concrete traffic grade is medium traffic.
(5) Designing the bending and pulling strength of the prefabricated cement concrete pavement: 5 MPa.
The construction method can produce great social benefit and economic benefit.
First, social benefits
1. Reduction of construction waste
If the on-site temporary road is hardened by cast-in-place concrete for 1000m2Measured, the concrete dosage is 0.26m × 1000m2＝260m3(ii) a 1000m reinforced concrete road plate assembled at one time28 times of turnover (the design service life is 18 years, the turnover is calculated according to 15 years temporarily and every 3 years), the road board can be repeatedly used once per week, and the construction waste discharge can be reduced once 260-
(260/5)＝208m3If the service life of the road plate is finished after 8 times of turnover, the total emission of construction waste can be reduced by 1040m3。
2. Reduction of CO2Is discharged from
Coal is the main energy source for producing cement in China, and the average comprehensive energy consumption is about 120kg standard coal when 1t cement is produced or used according to the current production process level, and CO is discharged to the atmosphere2Approximately 0.75t, each casting time is 1m3The C40 concrete needs 0.375t of cement, so it is used once every construction site for 1000m2The assembled concrete road plate can reduce CO2When the discharge amount is 0.375 × 0.75 × 208 ═ 58.5t and the road plate life ends after 5 turnovers, the total reduction of CO is achieved2The discharge amount is 292.5 t.
3. Reducing dust environmental pollution
Reducing the exploitation of various raw materials and breaking 1040m3Concrete construction waste and dust generated in the transportation process thereof.
4. Comprehensive social benefits
The assembly type road capable of being repeatedly used is prefabricated and assembled, is repeatedly used in a turnover mode and used in multiple projects, can reduce waste of resources such as building materials, fuel oil and electric power, is favorable for building enterprises to reduce cost and shorten construction period, is favorable for developing renting services of novel building materials, and expands other employment channels.
Second, economic benefits
The construction method can save construction cost by about 40% once and has obvious economic benefit.
Example two:
referring to fig. 1, a method for constructing a fabricated concrete pavement slab is different from the first embodiment in that: the precast concrete pavement slab in the step one is manufactured by adopting the following method
The first step is as follows: making a template
Manufacturing a template with the length-width ratio of 1-3 of the precast concrete road board, uniformly coating a release agent on the template, and uniformly and fixedly connecting two connecting hole molds at two ends of the bottom surface of the template along the radial direction;
the second step is that: installing a steel reinforcement framework of the precast concrete road board in the template;
the third step: positioning of hanging parts on steel reinforcement framework
Four hanging pieces are respectively fixed on the upper bottom surface and the lower bottom surface of the steel reinforcement framework, and the four hanging pieces are uniformly and symmetrically arranged on the steel reinforcement framework;
the fourth step: vibrating the concrete;
the fifth step: demoulding turning plate hoisting and health preserving
Turning the prefabricated concrete road board and preserving after the concrete strength reaches 75%; when the temperature is below 30 ℃, a natural gas steam boiler is adopted to heat and maintain the precast concrete road board;
and a sixth step: and (5) storing and secondary health preserving.
Preferably, the hanging piece comprises a round head hanging nail and a positioning rubber wave; the positioning rubber waves are adhered to the upper part of the round-head hanging nail, and the lower part of the round-head hanging nail is connected with the steel reinforcement framework; the connecting hole die is a cylindrical body consisting of two cylinders with different outer diameters, the outer diameter of the upper part is larger than that of the lower part, and the length of the upper part is smaller than that of the lower part.
In practical use, the template has enough strength, rigidity and deformation resistance in the turnover prefabrication period, and 16Mu steel can be used as the template material. When the template is installed, firstly, the prefabricated site is ensured to be as horizontal as possible after being hardened, and if the prefabricated site is not horizontal enough, the bottom surface of the template is ensured to be horizontal; secondly, a sealing rubber mat or other measures are adopted to ensure that the splicing seams of the template are compact, and finally the round head hanging nail is connected and the rubber waves are positioned. The template setting should fully consider the requirements of prefabrication, health preserving, transportation, drainage and the like, and green and environment-friendly planning construction should be made especially, for example, natural gas steam boilers are adopted in winter cultivation.
The concrete curing and the turning plate are the key of the whole prefabrication. This embodiment adopts "button head hanging nail + duck tongue lifting hook" frock when turning over the board, and the button head hanging nail is connected before concreting on steel framework, then pours, can turn over the board after concrete intensity reaches more than 75%, is connected the duck tongue lifting hook with button head hanging nail and hoist respectively, and the hoist lifts by crane, and the completion turns over board work. The plate is turned over by adopting the tool of the round head hanging nail and the duck tongue lifting hook, so that the plate turning and assembling and disassembling speed can be accelerated. The natural gas steam boiler is adopted for heating and curing, so that the time required by curing is effectively shortened.
In the embodiment, a 12cm5T round-head hanging nail for butt welding of the bottom anchor socket is adopted, so that front and back sides in prefabrication, plate turning and installation processes are convenient to hoist. In specific application, round head hanging nails of other types can be adopted.
And manufacturing a template with the length-width ratio of 1-3 of the precast concrete road board, so that two sides of the precast concrete road board are stressed. If the length-width ratio of the precast concrete road plate is too large, the precast concrete road plate can arch in the storage and transfer processes, and the control of the installation flatness is not facilitated.
The connecting hole mold is characterized in that a cylindrical body consisting of two cylinders with different outer diameters is adopted, the outer diameter of the upper part is larger than that of the lower part, and the length of the upper part is smaller than that of the lower part, so that a poured precast concrete road board forms a connecting hole which is communicated up and down and provided with a circular bead on the upper part. When the precast concrete road boards are spliced, the front precast concrete road board and the rear precast concrete road board are connected through the rectangular steel plate with the four screws fixedly connected with the upper surface in a vertical mode, the four screws on the rectangular steel plate are respectively arranged in the connecting holes formed in the ends of the front precast concrete road board and the rear precast concrete road board, the shockproof gaskets are respectively sleeved on the four screws, the shockproof gaskets are lapped at the circular bead of the connecting holes, then the nuts are screwed, and the positioning rubber waves are installed on the ends of the screws of the nuts to be screwed, so that rainwater on the road surface is prevented from permeating. The front and the rear precast concrete road boards are fixedly connected through the connecting pieces, so that the precast concrete road boards can be effectively prevented from moving when the vehicle longitudinally runs along a road, and the pavement structure is kept integral.
Example three:
referring to fig. 1, the construction method of the fabricated concrete pavement slab is different from the first or second embodiment in that: the construction method of graded broken stones is adopted in the step of foundation base layer construction, the mixture is formed by mixing 20-30mm broken stones, 10-20mm broken stones, 5-10mm broken stones and stone chips according to the ratio of 15:35:15:35, and the water content in the mixture is 5% -6%.
In actual use, in order to ensure the mixing quality, a plant mixing method is adopted for centralized mixing, a paver in the prior art is adopted to pave by walking a reference steel wire rope, and a vibratory roller and a rubber-tyred roller are adopted for rolling; during construction, the water content of the mixture is strictly controlled to be 5% -6% so as to ensure a better compaction effect of the graded crushed stone layer.
The construction quality of graded broken stones is a key project for installing and using road panels, and directly influences the control of the pavement installation speed and the thickness of a sand cushion layer.
Example four:
referring to fig. 1, a method for constructing a fabricated concrete pavement slab, which is different from the first, second or third embodiment in that: the waterproof layer laid in the third step adopts waterproof geotextile; the waterproof geotextile is lapped longitudinally and transversely along the slope, and the lapping width is not less than 30 cm.
When the waterproof layer is actually used, the waterproof layer adopts geotextile, the good water guiding performance of the waterproof layer is fully utilized, and redundant liquid and gas in the soil body structure are discharged outside. The geotextile can enhance the tensile strength and the deformation resistance of the soil body and enhance the stability of the building structure.
When the geotextile is laid, the geotextile must be lapped along a slope, and the lapping width is not less than 30cm, so that the waterproof effect of the geotextile is ensured.
Example five:
referring to fig. 1, the fourth difference of the construction method of the fabricated concrete road plate from the embodiment is that: the sand cushion layer paved in the third step adopts a sand cushion layer paved by a line hanging and gray point method, the thickness of the paved sand cushion layer is 0.5-2.5 cm, and the modulus of the adopted sand is 3.0-2.3.
When in actual use, the sand cushion layer adopts the better effect of making level that has played of this technical scheme, avoids the pavement slab part unsettled, reduces the damage of pavement slab in the use.
Example six:
referring to fig. 1, the construction method of the fabricated concrete pavement slab is different from the fourth or fifth embodiment in that: and the four road boards are installed and leveled by adopting a wire hanging method, and meanwhile, the board seam width is controlled by adopting a bamboo plywood with the thickness of 7-9 mm.
In actual use, the technical scheme can meet the construction requirement and is simple and convenient to implement.
Example seven:
referring to fig. 1, the sixth difference of the construction method of the fabricated concrete road plate from the embodiment is that: the method for treating the plate seams in the fifth step is to fill the plate seams by adopting 3.0-2.3 modulus sand after screening and airing; and finally, performing waterproof plugging on the surface of the plate joint by using rubber asphalt, wherein the plugging thickness is 18-22 mm.
When in actual use, the treatment plate seam adopts the technical scheme, so that the collision between the plate and the control plate in the running process can be effectively controlled, and the water permeation in the running process can be reduced.
Example eight:
the construction method of the fabricated concrete road slab shown in fig. 1 is different from the seventh embodiment in that: and in the construction of the sixth road shoulder and the auxiliary projects, the two sides of the spliced concrete road slab are provided with macadam ditches along the axial direction of the road.
When in actual use, the arrangement of the macadam blind ditches avoids rainwater on the road surface from permeating into the foundation to influence the road quality.
Example nine:
a construction method of an assembled concrete road board is applied to the construction of temporary roads, terraces and various roads for quick rescue and relief work.
The road slab is produced by factory prefabrication, is less restricted by open weather, is easy to ensure in construction period, has concise procedures, controllable quality, neat and tidy work points and rapid on-site assembly, adopts uniform standard size, is easy to manufacture moulds and convenient to pour concrete, and is suitable for various roadbeds with certain bearing capacity. The invention has the advantages of smooth connection of all procedures, centralized construction equipment, less waste during splicing, centralized treatment and very small influence on the environment by field installation. The method is very suitable for temporary transportation roads and storage yards, and is also very suitable for road construction for emergency rescue and disaster relief.
Example ten:
the construction channel engineering (as shown in fig. 2) of a certain inter-city railway six-standard mixing station adopts the fabricated concrete slab of the embodiment, the road is 72 meters long and 12 meters wide, and the total number of the road slabs is 108. After the project is put into use, the project has been used for more than 1 year at present, the plate is not damaged, the surface has no cracks, the line shape is smoother, the phenomena such as bending and the like do not exist, and the effect is better. The above embodiments have the same effect, and the eighth embodiment has the best effect.
Example eleven:
the construction channel engineering (as shown in figure 3) in a certain area is transformed in a new built shed area, and 8 construction channels are shared, wherein the road plates are constructed by adopting the method. The project only takes more than two months from start-up to traffic. The inspection on site is carried out, so that the inspection and acceptance standards are met. The use condition is good at present. The above embodiments have the same effect, and the eighth embodiment has the best effect.
Example twelve:
the inside construction channel engineering (as shown in figure 4) of the east China's segment of the transformation of the canopy zone of a certain region of the bearing construction is 8 construction channels, wherein the channel plates are all constructed by adopting the prefabricated installation mode of the assembled reinforced concrete slabs. The concrete pavement area cast-in-place is 1000 square meters, the manufacturing cost is calculated according to the quota, 224.2 yuan per square meter, the transportation cost of a crusher is removed, 96 yuan per square meter, and the total cost for one-time generation is 1000 x (224.2+96) ═ 320200 yuan.
By adopting the method, the manufacturing cost of the precast slab is calculated according to the quota, namely 519 yuan per square meter (70 yuan per square meter for connecting the steel plates and the bolts, 349 yuan per square meter for reinforcing steel bar concrete, 100 yuan per square meter for field amortization and 5 times for cost amortization, and 300 yuan per meter per installation and disassembly each time3And a transportation cost of 30 yuan/m3(1.5 yuan/t/Km, 20Km each time), 519/5+ (30+300) × 0.26 ═ 189.6 yuan/square meter, the cost of recycling the fabricated reinforced concrete slabs is 1000 × 189.6.6 ═ 189600 yuan.
The construction cost is actually saved by 320200 and 189600, namely 130600 yuan, namely the construction cost can be saved by 40.8% once, and the economic benefit is obvious.
When the invention is adopted for construction, the prefabrication of the road slab can be synchronous with or advanced with the construction of the base layer, the whole construction time (especially when the temperature is lower in winter) can be greatly shortened, and the maintenance time can be shortened due to better maintenance conditions. The method has the advantages of adoption of standardized streamlined prefabrication, one-time investment of templates and tools, repeated utilization, regular field, relatively fixed workers, reduction of construction cost and neat and orderly assembly site.
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.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The construction method of the fabricated concrete road board is characterized by comprising the following steps
The method comprises the following steps: prefabricating a concrete road plate;
step two: constructing a foundation base layer;
step three: laying waterproof layer and cushion layer
After the second step is finished, paving a waterproof layer on the prepared foundation base layer, and after the waterproof layer is paved, paving a cushion layer on the waterproof layer;
step four: road plate installation
After the third step is finished, transporting the concrete road board prefabricated in the first step to a paving site for splicing;
step five: processing the plate seam;
step six: and constructing the soil shoulder and the accessory engineering.
2. The method of claim 1, wherein the precast concrete road slab of the first step is manufactured by the following method
The first step is as follows: making a template
Manufacturing a template with the length-width ratio of 1-3 of the precast concrete road board, uniformly coating a release agent on the template, and uniformly and fixedly connecting two connecting hole molds at two ends of the bottom surface of the template along the radial direction;
the second step is that: installing a steel reinforcement framework of the precast concrete road board in the template;
the third step: positioning of hanging parts on steel reinforcement framework
Four hanging pieces are respectively fixed on the upper bottom surface and the lower bottom surface of the steel reinforcement framework, and the four hanging pieces are uniformly and symmetrically arranged on the steel reinforcement framework;
the fourth step: vibrating the concrete;
the fifth step: demoulding turning plate hoisting and health preserving
Turning the prefabricated concrete road board and preserving after the concrete strength reaches 75%; when the temperature is below 30 ℃, a natural gas steam boiler is adopted to heat and maintain the precast concrete road board;
and a sixth step: and (5) storing and secondary health preserving.
3. The fabricated concrete pavement construction method according to claim 2, wherein: the hanging piece comprises a round head hanging nail and a positioning rubber wave; the positioning rubber waves are adhered to the upper part of the round-head hanging nail, and the lower part of the round-head hanging nail is connected with the steel reinforcement framework; the connecting hole die is a cylindrical body consisting of two cylinders with different outer diameters, the outer diameter of the upper part is larger than that of the lower part, and the length of the upper part is smaller than that of the lower part.
4. The fabricated concrete pavement construction method according to claim 1, wherein: the construction method of graded broken stones is adopted in the step of foundation base layer construction, the mixture is formed by mixing 20-30mm broken stones, 10-20mm broken stones, 5-10mm broken stones and stone chips according to the ratio of 15:35:15:35, and the water content in the mixture is 5% -6%.
5. The fabricated concrete pavement construction method according to claim 1, wherein: the waterproof layer laid in the third step adopts waterproof geotextile; the waterproof geotextile is lapped longitudinally and transversely along the slope, and the lapping width is not less than 30 cm.
6. The fabricated concrete pavement construction method according to claim 1, wherein: the sand cushion layer paved in the third step adopts a sand cushion layer paved by a line hanging and gray point method, the thickness of the paved sand cushion layer is 0.5-2.5 cm, and the modulus of the adopted sand is 3.0-2.3.
7. The fabricated concrete pavement construction method according to claim 1, wherein: and the four road boards are installed and leveled by adopting a wire hanging method, and the width of the seam between the concrete road boards is 5-15 mm when the concrete road boards are paved.
8. The fabricated concrete pavement construction method according to claim 1, wherein: the method for treating the plate seams in the fifth step is to fill the plate seams by adopting 3.0-2.3 modulus sand after screening and airing; and finally, performing waterproof plugging on the surface of the plate joint by using rubber asphalt, wherein the plugging thickness is 18-22 mm.
9. The fabricated concrete pavement construction method according to claim 1, wherein: and in the construction of the sixth road shoulder and the auxiliary projects, the two sides of the spliced concrete road slab are provided with macadam ditches along the axial direction of the road.
10. The fabricated concrete pavement construction method according to any one of claims 1-9, which is applied to temporary roads, terraces and various rapid rescue and relief roads.
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| CN202010607353.3A CN111764216A (en) | 2020-06-29 | 2020-06-29 | Construction method and application of fabricated concrete road plate |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089405A (en) * | 2021-03-22 | 2021-07-09 | 昆明理工大学 | Plate type pavement |
| CN113322730A (en) * | 2021-06-17 | 2021-08-31 | 河南省交通规划设计研究院股份有限公司 | Construction method of assembled municipal road pavement |
| CN113403905A (en) * | 2021-06-29 | 2021-09-17 | 中冶南方城市建设工程技术有限公司 | Fabricated concrete pavement and construction method |
| CN113481796A (en) * | 2021-06-16 | 2021-10-08 | 广西三片石智能科技有限公司 | Pavement paving method based on plate |
| CN113481771A (en) * | 2021-08-05 | 2021-10-08 | 常熟市第二市政路桥建设工程有限公司 | Permanent-temporary combined construction structure for municipal road and construction method thereof |
| CN113622254A (en) * | 2021-08-16 | 2021-11-09 | 中建二局第一建筑工程有限公司 | Construction method of heavy-load temporary prefabricated reinforced concrete road plate |
| CN114775377A (en) * | 2022-04-01 | 2022-07-22 | 宁波汇洲生态建设有限公司 | Green recyclable assembly type road intelligent pavement construction method and construction equipment |
| CN114990952A (en) * | 2022-05-31 | 2022-09-02 | 深圳市市政工程总公司 | Mounting method of reusable fabricated road |
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2020
- 2020-06-29 CN CN202010607353.3A patent/CN111764216A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089405A (en) * | 2021-03-22 | 2021-07-09 | 昆明理工大学 | Plate type pavement |
| CN113481796A (en) * | 2021-06-16 | 2021-10-08 | 广西三片石智能科技有限公司 | Pavement paving method based on plate |
| CN113322730A (en) * | 2021-06-17 | 2021-08-31 | 河南省交通规划设计研究院股份有限公司 | Construction method of assembled municipal road pavement |
| CN113403905A (en) * | 2021-06-29 | 2021-09-17 | 中冶南方城市建设工程技术有限公司 | Fabricated concrete pavement and construction method |
| CN113481771A (en) * | 2021-08-05 | 2021-10-08 | 常熟市第二市政路桥建设工程有限公司 | Permanent-temporary combined construction structure for municipal road and construction method thereof |
| CN113622254A (en) * | 2021-08-16 | 2021-11-09 | 中建二局第一建筑工程有限公司 | Construction method of heavy-load temporary prefabricated reinforced concrete road plate |
| CN114775377A (en) * | 2022-04-01 | 2022-07-22 | 宁波汇洲生态建设有限公司 | Green recyclable assembly type road intelligent pavement construction method and construction equipment |
| CN114990952A (en) * | 2022-05-31 | 2022-09-02 | 深圳市市政工程总公司 | Mounting method of reusable fabricated road |
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