CN107893353B - Construction method of roller compacted concrete road - Google Patents
Construction method of roller compacted concrete road Download PDFInfo
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- CN107893353B CN107893353B CN201711301879.3A CN201711301879A CN107893353B CN 107893353 B CN107893353 B CN 107893353B CN 201711301879 A CN201711301879 A CN 201711301879A CN 107893353 B CN107893353 B CN 107893353B
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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
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
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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
- E01C19/50—Removable forms or shutterings for road-building purposes; Devices or arrangements for forming individual paving elements, e.g. kerbs, in situ
- E01C19/502—Removable forms or shutterings, e.g. side forms; Removable supporting or anchoring means therefor, e.g. stakes
Abstract
The invention provides a construction method of a roller compacted concrete road, belonging to the field of road engineering and comprising the following steps: construction lofting; treating a pavement base layer; installing a template; pouring concrete; pouring prefabricated concrete on the roadbed, and ensuring that the concrete cannot be poured into the water pipe; rolling: the median construction is carried out in the middle of the road to the road surface compaction back, and the median includes two rows of baffles of erectting the setting, and the baffle extends along the extending direction of road, forms between two rows of baffles and plants the district, and the water pipe is located and plants the district, lays soil in planting the district, makes soil cover the water pipe. The concrete road built by the construction method has a more reasonable structure, and isolation zones exist after the road is built, so that vehicles running on two sides of the road can be safer; and the soil in the isolation zone has better water absorption and drainage effects, so that green plants planted in the isolation zone can grow better, the maintenance period is shortened, the survival rate is improved, and the road is more attractive.
Description
Technical Field
The invention relates to the field of road engineering, in particular to a construction method of a roller compacted concrete road.
Background
At present, a cement concrete road is still an important form in roads, and the concrete road generally needs to be rolled when in construction.
The safe use in later stage is more and more emphasized in the construction of present road, and the median is all can all be increased in the centre to present road in the use mostly, brings the vehicle of keeping apart the road both sides through the isolation, plays the effect of safe driving, and the road structure that nevertheless current construction mode produced is comparatively simple, and the practicality is relatively poor.
Disclosure of Invention
The invention provides a construction method of a roller compacted concrete road, aiming at solving the problems in the prior art.
The invention is realized by the following steps:
a construction method of a roller compacted concrete road comprises the following steps:
construction lofting;
treating a base course of the pavement: removing broken stones on the roadbed and the pavement, and using plain concrete to re-pave; meanwhile, the expansion joint plates are transversely separated, and the expansion joint plates are vertically aligned with the expansion joints and the contraction joints of the road surface;
installing a template: installing templates on two sides of a road; water pipes are evenly inserted into the middle of the road at intervals along the extending direction of the road, the water pipes are steel pipes, the water pipes are of structures with openings at two ends, the bottom ends of the water pipes are inserted into the pavement base layer, and the top ends of the water pipes are ensured to be positioned above the pavement after concrete is poured;
pouring concrete; pouring prefabricated concrete on the roadbed, and ensuring that the concrete cannot be poured into the water pipe;
rolling: compacting the road by a road roller; the median construction is carried out in the middle of the road to the road surface compaction back, and the median includes two rows of baffles of erectting the setting, and the baffle extends along the extending direction of road, forms between two rows of baffles and plants the district, and the water pipe is located and plants the district, lays soil in planting the district, makes soil cover the water pipe.
More preferably, when the isolation zone is constructed, connectors are arranged on two sides of the water pipe, and the bottom end of the baffle is connected to the concrete pavement through the connectors.
Preferably, the connecting piece comprises a flat pipe and a connecting piece which are connected, one end of the flat pipe is of an opening structure, the flat pipe is provided with a top plate and a bottom plate, and the flat pipe is also provided with a side edge for connecting the top plate and the bottom plate; the flat pipe is provided with a pin hole which penetrates through the top plate and the bottom plate; the connecting sheet is strip-shaped, a strip-shaped hole is formed in the connecting sheet, and the length direction of the strip-shaped hole is consistent with that of the connecting sheet; the connecting sheet is also provided with a connecting hole; one end of the connecting sheet is inserted into the flat tube, so that the strip-shaped holes are positioned in the flat tube, and the connecting holes are positioned outside the flat tube; the flat pipe and the connecting sheet are connected through a connecting pin, the connecting pin penetrates through pin holes of the bottom plate and the top plate, and the connecting pin penetrates through the strip-shaped hole; the side of the connecting piece is separated from the side so that the connecting piece can rotate around the connecting pin.
Preferably, one end of the flat pipe close to the water pipe is provided with a connecting ring, and the connecting ring is sleeved outside the water pipe; the section of baffle is the L type, and the bottom of baffle is the flat board, the flat board passes through bolted connection on the concrete road, just the bolt passes the connecting hole.
Preferably, before the soil is paved in the planting area, a collecting pipe is arranged at the top of the water pipe; the collecting pipe comprises a main pipe arranged horizontally, a connecting pipe connected to the bottom of the main pipe and a plurality of branch pipes connected to the top of the main pipe; the main pipe is a structure with openings at two ends, the connecting pipe is perpendicular to the main pipe and is communicated with the interior of the main pipe, and the branch pipes are perpendicular to the main pipe and are communicated with the interior of the main pipe; the connecting pipe is inserted in the water pipe; the top end of the water pipe is not more than 3cm higher than the concrete road; and covering the collecting pipe by soil when the soil is laid.
Further preferably, when the templates are installed, the templates should be installed stably, smoothly, flatly and without distortion, and the connection between adjacent templates should be tight and smooth, so that slurry leakage, front and rear stubble staggering and high and low staggering cannot be realized; the template should ensure that no shifting occurs during load travel, shock and vibration of the paving, tapping and leveling equipment.
More preferably, before each plate of mixture is mixed, the concrete is mixed with a proper amount of concrete mixture or mortar, the mixture is discarded after being mixed, and then the mixture is mixed according to a specified mixing ratio; the charging sequence of the stirrer comprises sand, cement and gravel, and water is added while stirring; the stirring time is at least 90 s.
Further preferably, the installation height of the template is consistent with the thickness of the concrete plate; the plane position and elevation of the vertical mold meet the design requirements, slurry leakage does not occur when the template joint and the template are in contact with the base layer, and an isolating agent is coated on the surface of the template in contact with concrete; and removing the formwork after concrete pouring for at least 20 h.
According to the construction method of the roller compacted concrete road provided by the invention, the concrete road structure built by the construction method is more reasonable, and the isolation zones exist after the road construction is finished, so that vehicles running on two sides of the road can be safer; and the soil in the isolation zone has better water absorption and drainage effects, so that green plants planted in the isolation zone can grow better, the maintenance period is shortened, the survival rate is improved, and the road is more attractive.
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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a road obtained by a method of constructing a roller compacted concrete road according to an embodiment of the present invention;
FIG. 2 is a schematic top view of a roller compacted concrete road constructed according to the method of the present invention;
FIG. 3 is a schematic structural diagram of a connecting member used in a method for constructing a roller compacted concrete road according to an embodiment of the present invention;
fig. 4 is a schematic side view of a flat pipe used in the construction method of a roller compacted concrete road provided in the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a manifold used in a construction method of a roller compacted concrete road according to an embodiment of the present invention.
Summary of reference numerals: the road surface roadbed 11, the plain concrete layer 12, the concrete layer 13, the water pipe 14, the baffle 15, the planting area 16, the isolation belt 17, the connecting piece 18, the flat pipe 19, the connecting piece 20, the top plate 21, the bottom plate 22, the side 23, the pin hole 24, the strip-shaped hole 25, the connecting hole 26, the connecting ring 27, the flat plate 28, the bolt 29, the collecting pipe 30, the main pipe 31, the connecting pipe 32 and the branch pipe 33.
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.
See, e.g., FIGS. 1-5 for example 1.
The embodiment provides a construction method of a roller compacted concrete road, the concrete road constructed by the construction method has a more reasonable structure, and the isolation belts 17 exist after the road construction is finished, so that vehicles running on two sides of the road can be safer; and the soil in the isolation belt 17 has better water absorption and drainage effects, so that green plants planted in the isolation belt 17 can grow better, the maintenance period is shortened, the survival rate is improved, and the road is more attractive.
As shown in fig. 1, the construction method of the roller compacted concrete road comprises the following steps:
construction lofting;
treating a base course of the pavement: removing broken stones on the roadbed and the pavement, and using plain concrete to re-pave; meanwhile, the expansion joint plates are transversely separated, and the expansion joint plates are vertically aligned with the expansion joints and the contraction joints of the road surface;
installing a template: installing templates on two sides of a road; the water pipes 14 are uniformly inserted into the middle of the road at intervals along the extending direction of the road, the water pipes 14 are steel pipes, the water pipes 14 are of structures with openings at two ends, the bottom ends of the water pipes 14 are inserted into the pavement base layer, and the top ends of the water pipes 14 are positioned above the pavement after concrete is poured;
pouring concrete; pouring prefabricated concrete on the roadbed, and ensuring that the concrete is not poured into the water pipe 14;
rolling: compacting the road by a road roller; after the pavement is compacted, construction of an isolation belt 17 is carried out in the middle of the road, the isolation belt 17 comprises two rows of baffle plates 15 which are vertically arranged, the baffle plates 15 extend along the extending direction of the road, a planting area 16 is formed between the two rows of baffle plates 15, the water pipe 14 is positioned in the planting area 16, soil is paved in the planting area 16, and the water pipe 14 is covered by the soil.
When the template is installed, a water pipe 14 is preset, and the bottom end of the water pipe 14 penetrates through the plain concrete layer 12 and is inserted into the roadbed 11 of the pavement. The road subgrade 11 is an original soil component and has good water seepage and water storage performance. The water pipes 14 are inserted into the roadbed 11 to exchange water.
The concrete layer 13 is formed at the time of concrete casting, and the water pipe 14 is fixed into the concrete layer 13 with the top end of the water pipe 14 extending outside the concrete layer 13. Road rollers are adopted to compact the road, so that the road surface is solid and stable. At the same time, it should be ensured that the roller does not press the water pipe 14. Through setting up baffle 15 and filling soil between two baffles 15 and having formed median 17, the inside planting district 16 that forms of median 17, can plant green planting in planting district 16.
In heavy rain days or plum rain seasons, the rainwater is ceaselessly dropped, the isolation belt 17 of the traditional road is simple in structure, and the rainwater is accumulated in soil to easily cause necrosis of plant roots. In the median 17 provided in this embodiment, the bottom of the median 17 can communicate with the roadbed 11 through the water pipe 14, and when the water in the median 17 is excessive, the water can be discharged into the roadbed 11 through the water pipe 14 and can be quickly seeped out. In dry weather, moisture in the roadbed 11 can enter soil in the planting area 16 through the water pipe 14 to provide certain moisture for green plants in the isolation zone 17.
In some cases, if the isolation belt 17 needs to be removed, the green plants, the soil and the baffles 15 are removed, the water pipes 14 are knocked into the roadbed 11 of the road, or the top ends of the water pipes 14 are cut off, and the concrete is filled, so that the road surface of the concrete road can be very flat.
Therefore, the concrete road with the structure built by the construction method has more reasonable structural design, can play a role in various occasions, can be very convenient and fast when the isolation belt 17 needs to be dismantled, has simple dismantling process and few working procedures, and is very suitable for popularization and application.
When the isolation belt 17 is constructed, the connectors 18 are arranged on two sides of the water pipe 14, and the bottom end of the baffle 15 is connected to the concrete pavement through the connectors 18.
Set up connecting piece 18 on water pipe 14 to make baffle 15 connect on connecting piece 18, can make baffle 15 connect more firmly, and can guarantee the distance between both sides baffle 15 and water pipe 14 better, make water pipe 14 more easily guaranteed to be in the intermediate position of two baffles 15, make the drainage water storage of median 17 more convenient.
As shown in fig. 3 and 4, the connecting member 18 includes a flat tube 19 and a connecting piece 20 connected to each other, one end of the flat tube 19 is of an open structure, the flat tube 19 has a top plate 21 and a bottom plate 22, and the flat tube 19 further has a side 23 connecting the top plate 21 and the bottom plate 22; the flat pipe 19 is provided with a pin hole 24 penetrating through the top plate 21 and the bottom plate 22; the connecting sheet 20 is in a strip shape, a strip-shaped hole 25 is formed in the connecting sheet 20, and the length direction of the strip-shaped hole 25 is consistent with that of the connecting sheet 20; the connecting sheet 20 is also provided with a connecting hole 26; one end of the connecting piece 20 is inserted into the flat tube 19, so that the strip-shaped hole 25 is positioned inside the flat tube 19, and the connecting hole 26 is positioned outside the flat tube 19; the flat pipe 19 and the connecting sheet 20 are connected through a connecting pin, the connecting pin passes through the pin holes 24 of the bottom plate 22 and the top plate 21, and the connecting pin passes through the strip-shaped hole 25; the side of the connecting piece 20 is separated from the side 23 so that the connecting piece 20 can rotate about the connecting pin.
The flat tube 19 has a flat tube structure, and is hollow at its inside, and has one end open and the other end closed, and the open end is adapted to allow the connecting piece 20 to extend into the flat tube 19. The top plate 21, the bottom plate 22 and the side 23 are all structural members of the flat tube 19. The pin hole 24 is a vertically opened hole and penetrates the bottom plate 22 and the top plate 21. Inside connection piece 20 can insert flat pipe 19, set up bar hole 25 on connection piece 20, pin hole 24 can be aimed at to bar hole 25. When the coupling piece 20 is inserted into the flat tube 19, the flat tube 19 and the coupling piece 20 can be coupled by a coupling pin.
After the flat pipe 19 and the connecting piece 20 are connected, the connecting pin passes through the strip-shaped hole 25. Due to the nature of the slotted holes 25, the connecting piece 20 is made to telescope, so that the overall length of the connecting piece 18 can be controlled. By controlling the position of the end of the web 20, the overall width of the median 17 can be controlled, allowing more space for vehicles to travel in locations with a narrower road surface, and allowing greater separation distances between vehicles traveling in opposite directions in locations with a wider road surface. The width of the inner part of the flat pipe 19 is larger, and the width of the connecting piece 20 is smaller, so that the connecting piece 20 connected into the flat pipe 19 can swing in the flat pipe 19, namely rotate by a certain range around the connecting pin. The arrangement enables the position of the end part of the connecting piece 20 to be adjustable, when the road surface is a curved section, the isolation belt 17 is also made into a corresponding curved section, and the position of the end part of the connecting piece 20 is adjusted at the moment, so that the end part can be placed at a more accurate position, and the baffle 15 can be better connected to the road surface.
As shown in fig. 3, one end of the flat tube 19 close to the water tube 14 is provided with a connecting ring 27, and the connecting ring 27 is sleeved outside the water tube 14; the cross section of the baffle plate 15 is L-shaped, the bottom of the baffle plate 15 is a flat plate 28, the flat plate 28 is connected to a concrete road through a bolt 29, and the bolt 29 penetrates through the connecting hole 26.
The connecting ring 27 is made of thin iron wire, so that the connecting ring can be conveniently bent and connected to the end part of the flat pipe 19, and can be conveniently sleeved at the outer end of the water pipe 14. The bottom of the L-shaped baffle 15 is a flat plate 28, and when the baffle 15 is connected, bolts 29 penetrate through the flat plate 28 and the connecting holes 26, so that the L-shaped baffle can be conveniently fixed into the ground. In this way, the baffle 15 can be placed on the ground more smoothly and can be connected more conveniently.
As shown in fig. 1, before soil is laid in the planting area 16, a collecting pipe 30 is arranged on the top of the water pipe 14; the collecting pipe 30 comprises a horizontally arranged main pipe 31, a connecting pipe 32 connected to the bottom of the main pipe 31, and a plurality of branch pipes 33 connected to the top of the main pipe 31; the main pipe 31 is a structure with two open ends, the connecting pipe 32 is perpendicular to the main pipe 31 and communicated with the interior of the main pipe 31, and the branch pipe 33 is perpendicular to the main pipe 31 and communicated with the interior of the main pipe 31; the connecting pipe 32 is inserted in the water pipe 14; the top end of the water pipe 14 is not more than 3cm higher than the concrete road; the manifold 30 is covered by soil when the soil is laid.
By arranging the collecting pipe 30, accumulated water in a larger range and a larger area in the planting area 16 can flow towards the water pipe 14 and is discharged out of the planting area 16 through the water pipe 14. The header pipe 31 of the manifold pipe 30 is arranged in the horizontal direction, and the length direction of the header pipe 31 coincides with the length direction in which the baffle 15 is provided. The connection pipe 32 is disposed at the bottom of the branch pipe 33, and the connection pipe 32 is inserted into the main pipe 31, so that the water in the main pipe 31 can flow into the main pipe 31 through the connection pipe 32. The branch pipes 33 are arranged at the top of the main pipe 31, the branch pipes 33 are vertically arranged and are inserted into soil of the planting area 16, and the plurality of branch pipes 33 arranged at intervals can collect the soil in the planting area 16 in a larger range, so that water in the planting area 16 can be drained more easily.
When the templates are installed, the templates are firmly installed, straight, flat and free of distortion, the connection between the adjacent templates is tight and smooth, and slurry leakage, front and rear staggered stubbles and high and low staggered platforms are not obtained; the template should ensure that no shifting occurs during load travel, shock and vibration of the paving, tapping and leveling equipment.
When the concrete is mixed, before each plate of mixture, a proper amount of concrete mixture or mortar is mixed, the mixture is discarded after being mixed, and then the mixture is mixed according to the specified mixing ratio; the charging sequence of the stirrer comprises sand, cement and gravel, and water is added while stirring; the stirring time is at least 90 s.
The mounting height of the template is consistent with the thickness of the concrete plate; the plane position and elevation of the vertical mold meet the design requirements, slurry leakage does not occur when the template joint and the template are in contact with the base layer, and an isolating agent is coated on the surface of the template in contact with concrete; and removing the formwork after concrete pouring for at least 20 h.
Example 2:
the construction method of the roller compacted concrete road provided by the embodiment comprises the following steps:
first, construction lofting
(1) And carrying out construction lofting work after the acceptance of the road base course is qualified, wherein one pile is placed at each 15 meters of the straight line section, and one pile is placed at each 5 meters of the curve section. Meanwhile, expansion joint and contraction joint are required to be arranged.
(2) And checking the concrete partitioning lines of the construction drawing on site according to the placed central line and the side piles. For curved segments, the transverse partitioning line is kept perpendicular to the road centerline.
(II) treating a pavement base layer:
(1) and removing the broken stones, bulges and other dregs on the roadbed and the pavement, using plain concrete for re-paving, and simultaneously arranging expansion joint plates for transverse separation, wherein the expansion joint plates are aligned with expansion joints and contraction joints of the pavement up and down.
(2) When the base layer generates non-expansibility thermal shrinkage and dry shrinkage cracks, sealing and waterproofing treatment should be carried out.
(3) And when the base layer generates larger longitudinal expansion cracks, roadbed stabilizing measures are adopted for treatment.
(4) When the base layer of a part of areas needs to be filled and repaired in a large area, the cement mixed stone blocks are used as the base layer.
(III) installing a template:
(1) the form must have sufficient strength and rigidity to allow the deformed form to be corrected and used.
(2) The templates are required to be installed stably, straightly and smoothly without distortion, and the connection of adjacent templates is required to be tight and smooth, so that the phenomena of slurry leakage, front and back stubble staggering, high and low platform staggering and the like are avoided. The form should ensure that the load of the paving, jolting and leveling equipment does not shift when it is time to advance, impact and vibrate.
(3) The inner side fixing steel rod and the outer side stress steel rod are not higher than the template, so that the vibration beam can pass through the template.
And (IV) mixing and transporting concrete:
1) and mixing:
A. the concrete is mixed intensively by adopting a mixing plant.
B. The amount of sand, gravel and cement can be mixed after being accurately adjusted, and sampling inspection is needed at any time during the mixing process. And the water content is strictly controlled.
C. Before each plate of mixture, a proper amount of concrete mixture or mortar is mixed, and the mixture is discarded after being mixed, and then the mixture is mixed according to the specified mixing ratio.
D. The charging sequence of the stirrer is as follows: after feeding sand, cement, gravel or broken stone, cement and sand, adding water while stirring.
E. The stirring time depends on the working properties, the minimum time being 90 s.
F. The slump of the cement concrete mixture should be strictly controlled. The mixing slump is the sum of the slump value which is most suitable for paving and the transportation slump loss value at the current air temperature.
(2) And (3) transportation:
A. the transportation adopts the dump truck, and the vehicle that transports the concrete should clean the carriage before filling, and watering moist wall is drained ponding to take measures to prevent moisture loss and segregation in the transportation.
B. When the concrete mixture is transported, slurry leakage cannot occur, the discharge amount and the discharge height during paving cannot exceed 1.5 meters, and if segregation occurs, the concrete mixture is stirred again before paving.
C. The time from the discharge of the concrete from the mixer to the completion of the placement must not exceed the maximum allowable time.
(V) pouring concrete:
(1) the requirements of the formwork and the height of the installed formwork should be consistent with the thickness of the concrete slab.
A. The plane position and elevation of the vertical mould meet the design requirements, the vertical mould is accurate and stable, the joint is tight and smooth, and the phenomena of gap, front and back alternate stubbles, uneven height and the like are avoided. The template joint and the template are not contacted with the base layer to avoid slurry leakage, and the surface of the template contacted with concrete is coated with a separant.
B. Before concrete mixture paves, the interval of reply template, height, lubrication, support stability and the voucher of basic unit, the moist condition to and the position and the dowel steel device of reinforcing bar carry out comprehensive inspection.
C. Removing the mold: after 20h, the concrete panel should not be damaged by dismantling.
(2) Paving the concrete mixture:
A. the paving thickness is in consideration of the reserved height. Controlling the loose coefficient of the mixture to be between K =1.1-1.25, and taking a higher value when the material is dry; otherwise, take the lower value.
B. Adopts manual spreading, and strictly forbids throwing and raking.
(3) Vibrating:
A. for the corner parts, an inserted vibrator is used for vibrating in sequence, and then a flat vibrator is used for supporting and vibrating in a crisscross mode.
B. The duration of the vibration of the vibrator at each position is determined by that the mixture stops sinking, no bubbles are generated and cement mortar is discharged, and the vibrator is not suitable for over-vibration.
C. During vibration, manual material supplement is required, the vibration effect, the displacement, deformation, loosening, slurry leakage and other conditions of the template, the pull rod, the dowel bar and the reinforcing steel bar are checked at any time, and the conditions are corrected in time.
D. When leveling, the filling material should be selected from a thinner mixture, and pure mortar is strictly forbidden to be used for filling and leveling. The top surface of the template is required to be kept neat during leveling, and the surface of the inserting position is smooth.
(4) Vibrating the beam to compact:
A. 1 vibrating beam is used on each lane of pavement, the vibrating beam has enough strength and quality, coarse aggregate compaction teeth of about 3mm are welded at the bottom of the vibrating beam, and the thickness of (3 +/-1) mm of surface mortar is ensured.
B. The vibration beam should be dragged along the longitudinal direction perpendicular to the central line of the road surface for 2-3 times to make the surface slurry turn uniformly and smoothly.
(5) And leveling the facing:
A. each lane should be equipped with 1 roller. After the vibrating beam is compacted, the rolling bar is dragged to reciprocate for 2-3 times to extract and level. The first time uses short distance to push or support the roller slowly, then needs longer distance to support the roller evenly, and drives the cement paste in front of the roller.
B. The surface after rolling is preferably leveled by a 3m scratch board in length and breadth 1 time or compacted and leveled by a blade type or disc type plastering machine 2-3 times.
C. After finishing the operation of the plastering machine, edge cleaning and seam trimming, viscous paste cleaning, edge deletion and corner drop repairing are carried out.
(6) And (3) constructing an anti-sliding structure: after the concrete compressive strength reaches 40%, hard grooving can be carried out, and the concrete compressive strength can be finished within two weeks. The grains are in accordance with the direction of the transverse seams, the width of the grains is 3mm, the depth of the grains is 4mm, the distance between the grains is 15-25 mm, and the grains are randomly arranged.
(VI) rolling: and compacting the road surface by a road roller to finish the operation.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended 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.
Claims (6)
1. The construction method of the roller compacted concrete road is characterized by comprising the following steps:
construction lofting;
treating a base course of the pavement: removing broken stones on the roadbed and the pavement, and using plain concrete to re-pave; meanwhile, the expansion joint plates are transversely separated, and the expansion joint plates are vertically aligned with the expansion joints and the contraction joints of the road surface;
installing a template: installing templates on two sides of a road; water pipes are evenly inserted into the middle of the road at intervals along the extending direction of the road, the water pipes are steel pipes, the water pipes are of structures with openings at two ends, the bottom ends of the water pipes are inserted into the pavement base layer, and the top ends of the water pipes are ensured to be positioned above the pavement after concrete is poured;
pouring concrete; pouring prefabricated concrete on the roadbed, and ensuring that the concrete cannot be poured into the water pipe;
rolling: compacting the road by a road roller; after the pavement is compacted, constructing an isolation strip in the middle of the road, wherein the isolation strip comprises two rows of vertically arranged baffles, the baffles extend along the extending direction of the road, a planting area is formed between the two rows of baffles, a water pipe is positioned in the planting area, and soil is paved in the planting area to cover the water pipe with the soil; connecting pieces are arranged on two sides of the water pipe, and the bottom end of the baffle is connected to the concrete pavement through the connecting pieces; the connecting piece comprises a flat pipe and a connecting piece which are connected, one end of the flat pipe is of an opening structure, the flat pipe is provided with a top plate and a bottom plate, and the flat pipe is also provided with a side edge for connecting the top plate and the bottom plate; the flat pipe is provided with a pin hole which penetrates through the top plate and the bottom plate; the connecting sheet is strip-shaped, a strip-shaped hole is formed in the connecting sheet, and the length direction of the strip-shaped hole is consistent with that of the connecting sheet; the connecting sheet is also provided with a connecting hole; one end of the connecting sheet is inserted into the flat tube, so that the strip-shaped holes are positioned in the flat tube, and the connecting holes are positioned outside the flat tube; the flat pipe and the connecting sheet are connected through a connecting pin, the connecting pin penetrates through pin holes of the bottom plate and the top plate, and the connecting pin penetrates through the strip-shaped hole; the side of the connecting piece is separated from the side so that the connecting piece can rotate around the connecting pin.
2. The roller compacted concrete road construction method according to claim 1, wherein one end of the flat pipe close to the water pipe is provided with a connecting ring, and the connecting ring is sleeved outside the water pipe; the section of baffle is the L type, and the bottom of baffle is the flat board, the flat board passes through bolted connection on the concrete road, just the bolt passes the connecting hole.
3. The method of constructing a roller compacted concrete road according to claim 2, wherein a collecting pipe is provided on top of the water pipe before soil is laid in the planting area; the collecting pipe comprises a main pipe arranged horizontally, a connecting pipe connected to the bottom of the main pipe and a plurality of branch pipes connected to the top of the main pipe; the main pipe is a structure with openings at two ends, the connecting pipe is perpendicular to the main pipe and is communicated with the interior of the main pipe, and the branch pipes are perpendicular to the main pipe and are communicated with the interior of the main pipe; the connecting pipe is inserted in the water pipe; the top end of the water pipe is not more than 3cm higher than the concrete road; and covering the collecting pipe by soil when the soil is laid.
4. The roller compacted concrete road construction method according to claim 3, wherein the formworks are installed stably, smoothly, flatly and without distortion when the formworks are installed, and the connection between the adjacent formworks is tight and smooth, so that slurry leakage, front and rear stubbles and high and low slab staggering are not caused; the template should ensure that no shifting occurs during load travel, shock and vibration of the paving, tapping and leveling equipment.
5. The roller compacted concrete road construction method according to claim 4, wherein before each set of mixture is mixed with concrete, a proper amount of concrete mixture or mortar is mixed with the mixture, the mixture is discarded after being mixed, and then the mixture is mixed according to a specified mixing ratio; the charging sequence of the stirrer comprises sand, cement and gravel, and water is added while stirring; the stirring time is at least 90 s.
6. The roller compacted concrete road construction method according to claim 5, wherein the formwork installation height is consistent with the thickness of the concrete slab; the plane position and elevation of the vertical mold meet the design requirements, slurry leakage does not occur when the template joint and the template are in contact with the base layer, and an isolating agent is coated on the surface of the template in contact with concrete; and removing the formwork after concrete pouring for at least 20 h.
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| CN108978390A (en) * | 2018-06-13 | 2018-12-11 | 中国水利水电第九工程局有限公司 | A kind of pavement construction method on the road Tong Cun |
| CN108978391A (en) * | 2018-06-13 | 2018-12-11 | 中国水利水电第九工程局有限公司 | A kind of concrete pavement construction method |
| CN111910480B (en) * | 2019-09-09 | 2021-12-10 | 佛山市国林建设工程有限公司 | Landscaping construction method for garden road |
| CN112030653B (en) * | 2020-07-13 | 2021-11-02 | 中国港湾工程有限责任公司 | Cement stabilized macadam construction process |
| 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 |
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