CN114808620B - Front-mounted sensor embedding method based on sliding mode paving - Google Patents
Front-mounted sensor embedding method based on sliding mode paving Download PDFInfo
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- CN114808620B CN114808620B CN202210332757.5A CN202210332757A CN114808620B CN 114808620 B CN114808620 B CN 114808620B CN 202210332757 A CN202210332757 A CN 202210332757A CN 114808620 B CN114808620 B CN 114808620B
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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
- E01C19/508—Devices or arrangements for forming individual paving elements in situ, e.g. by sectioning a freshly-laid slab
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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
- E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
- E01C19/4886—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ for forming in a continuous operation kerbs, gutters, berms, safety kerbs, median barriers or like structures in situ, e.g. by slip-forming, by extrusion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
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- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a front-mounted sensor embedding method based on slipform paving, belonging to the technical field of slipform paving construction; the method comprises the following steps of embedding by using a front-mounted sensor embedding device based on sliding mode paving, wherein the device comprises: the mold assembly is used for being placed in the ground when a road surface is paved and comprises at least one group of dam-shaped molds, and the dam-shaped molds are of an upper opening structure and a lower opening structure; the supporting component is connected with the dam-shaped die and used for supporting the sensor; concrete filled in the dam-shaped mould; the method comprises the following steps: before paving construction begins, preparing a mould assembly according to the height of the embedded sensor; placing and fixing the sensor in the mold assembly; determining the position of the mold assembly based on the position at which the sensor is to be embedded; pouring concrete into the pavement from an upper opening of the dam-shaped mold to spread the concrete; when the concrete in the dam-shaped mould has certain strength, drawing out the dam-shaped mould from the ground; filling the two sides of the formed concrete dam body, and filling the upper part of the concrete dam body.
Description
Technical Field
The invention relates to the technical field of slipform paving construction, in particular to a front-mounted sensor embedding method based on slipform paving.
Background
The concrete pavement structure information monitoring mainly comprises surface mechanical property monitoring and internal mechanical property monitoring. The mechanical performance monitoring of the concrete pavement interior mainly comprises the steps of embedding sensors with different functions in the pavement to sense the mechanical response of the interior structure under the action of vehicle load, wherein the commonly used sensors comprise a stress strain sensor, a soil pressure sensor, a fiber grating sensor, an acceleration sensor and the like. The collected data comprise stress strain, vibration, temperature and the like, can be used for representing the health condition of the pavement structure, identifying common diseases in the pavement such as subgrade settlement, void, cracks and the like, and is beneficial to developing the timely maintenance of the pavement.
However, the sensors currently buried in the road surface are mainly used for grooving or drilling the road surface after the road surface is paved or operated for a period of time, then the sensors are placed in the groove positions, and finally the sensors are backfilled by using concrete.
The method has the advantages that the structure of the concrete pavement slab is adversely affected by cutting seams, slotting and the like, so that the sensor with larger size is not easy to embed, the structural integrity of the original concrete slab is damaged by concrete after the slotting and backfilling, and the pavement flatness is reduced.
Disclosure of Invention
The invention provides a front-mounted sensor embedding method based on sliding formwork paving, and aims to solve the problems that the structure of a concrete pavement slab is adversely affected due to the adoption of grooving, slotting and the like, so that the embedding of a sensor with a large size is not facilitated, the structural integrity of the original concrete slab is damaged by concrete after slotting and backfilling, and the pavement flatness is reduced.
In order to solve the technical problems, the invention provides the following technical scheme:
a slipform-based front-mounted sensor burying method, comprising burying using a slipform-based front-mounted sensor burying apparatus, the apparatus comprising:
the mold assembly is used for being placed in the ground when the pavement is paved, and comprises at least one group of dam-shaped molds, wherein the dam-shaped molds are of an upper opening structure and a lower opening structure;
the supporting component is connected with the dam-shaped die and used for supporting the sensor;
concrete filled in the dam-shaped mould;
the method comprises the following steps:
molding: before paving construction begins, preparing a mould assembly according to the height of the embedded sensor;
fixing: placing and securing the sensor in the mold assembly;
erecting a mold on site: determining a position of the mold assembly based on a position at which the sensor is to be embedded;
pouring concrete: pouring concrete into the pavement from an upper opening of the dam-shaped mold to spread the concrete;
demolding: when the concrete in the dam-shaped mold has certain strength, the dam-shaped mold is pulled out from the ground to expose the concrete dam body;
peripheral treatment: and after demolding is finished, filling the two sides of the formed concrete dam body, and filling the upper part of the concrete dam body.
In an optional embodiment, the dam-shaped mold includes at least two first mold plates and two second mold plates, the two first mold plates are disposed opposite to each other, the two second mold plates are disposed opposite to each other, and two ends of the first mold plate are respectively connected to two ends of the second mold plates, so as to form a dam-shaped mold with an upper and lower opening structure.
In an alternative embodiment, the first mold plate and the second mold plate have mold wire holes, and the mold wire holes of the first mold plate and the mold wire holes of the second mold plate are located at the same horizontal plane.
In an alternative embodiment, the support assembly includes a support wire that shuttles through the mold wire holes to support the sensors.
In an optional embodiment, the first template and the second template have limiting holes, and the support assembly further includes a limiting steel wire, wherein the limiting steel wire limits the sensor through the limiting holes.
In an alternative embodiment, the in situ formwork erecting step includes determining a time to set the formwork assembly in advance based on a construction speed and a paving direction of the paving, and an initial setting time of concrete used for the paving.
In an optional embodiment, the concrete pouring step further comprises pressing the concrete in the dam-shaped mold to make the concrete filled densely.
In an alternative embodiment, the step of peripherally processing the filling of the sides of the formed concrete dam further comprises filling the sides of the formed concrete dam with concrete for paving.
In an alternative embodiment, the filling of both sides of the formed concrete dam in the peripheral processing step includes gradually decreasing the height of the formed concrete dam in the paving direction of the paver.
In an alternative embodiment, the filling of the two sides of the formed concrete dam in the peripheral processing step includes that the height of the concrete dam close to the paver side is higher than the height of the concrete dam far from the paver side.
The technical scheme of the invention has the following beneficial effects:
the method provided by the embodiment of the invention can be pre-arranged on the road surface base before the concrete pavement construction, and the concrete pavement is directly and integrally formed with the paved concrete pavement through the processes of the spiral vibrator, the high-frequency vibrating rod, the vibrating leveling beam, the suspension leveling plate and the like in the slip-form paving process of the concrete pavement, so that the reliability of the monitoring data of the sensor is ensured, and the adverse effect of the sensor embedding on the concrete pavement structure is reduced. After the method provided by the embodiment of the invention is used for on-site formwork erection and formwork removal, the concrete dam body is a concrete material for pavement paving, and the interface coupling performance of the concrete dam body model and the pavement concrete material is enhanced.
Drawings
FIG. 1 is a schematic flow chart of a front-mounted sensor embedding method based on sliding mode paving according to an embodiment of the invention;
FIG. 2 is a front view of a concrete dam body;
FIG. 3 is a side view of a concrete dam body;
FIG. 4 is a perspective view of a dam mold with sensors placed therein;
FIG. 5 is a diagram of a dam mold object with a sensor placed therein;
FIG. 6 is a side view of a pre-positioned sensor embedding method embedding process based on slipform paving;
FIG. 7 is a top view of a pre-mounted sensor embedding method based on sliding mode paving.
[ reference numerals ]
1. A dam-shaped mold; 11. a first template; 12. a second template; 101. a die line hole; 102. a limiting hole; 2. a support assembly; 21. supporting a steel wire; 22. limiting the steel wire; 3. a sensor; 31. a connecting wire; 32. connecting wire grooves; 4-a paver; 5. a concrete dam body.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention provides a sliding-mode-paving-based front-mounted sensor embedding method, which comprises the following steps of embedding by using a sliding-mode-paving-based front-mounted sensor embedding device, and referring to fig. 2-5, the device comprises:
the mold assembly is used for being placed in the ground when the pavement is paved, the mold assembly comprises at least one group of dam-shaped molds 1, and the dam-shaped molds 1 are of an upper opening structure and a lower opening structure;
the supporting component 2 is connected with the dam-shaped die 1 and used for supporting the sensor 3;
concrete filled in the dam-shaped mould 1;
referring to fig. 1, the method for embedding a front sensor based on sliding mode paving comprises the following steps:
s101, molding: before paving construction begins, preparing a mould assembly according to the height of the embedded sensor 3;
s102, fixing: placing and fixing the sensor 3 in the mold assembly;
s103, field formwork erection: determining the position of the mould assembly based on the position at which the sensor 3 is to be embedded;
s104, pouring concrete: pouring concrete into the pavement from an upper opening of the dam-shaped mould 1 to pave the concrete;
s105, demolding: when the concrete in the dam-shaped mould 1 has certain strength, the dam-shaped mould 1 is drawn out from the ground to expose the concrete dam body 5;
s106: peripheral treatment: and after demolding is finished, filling the two sides of the formed concrete dam body 5, and then filling the upper part of the concrete dam body 5.
The method provided by the embodiment of the invention at least has the following beneficial effects:
the method provided by the embodiment of the invention can be pre-arranged on the road surface base before the concrete pavement construction, and the concrete pavement is directly and integrally formed with the paved concrete pavement through the processes of the spiral vibrator, the high-frequency vibrating rod, the vibrating leveling beam, the suspension leveling plate and the like in the slip-form paving process of the concrete pavement, so that the reliability of the monitoring data of the sensor 3 is ensured, and the adverse effect of the sensor 3 embedded on the concrete pavement structure is reduced. After the method provided by the embodiment of the invention is used for on-site formwork erection and formwork removal, the concrete dam body 5 is a concrete material used for pavement paving, and the interface coupling performance of the concrete dam body 5 model and the pavement concrete material is enhanced.
The methods provided by the embodiments of the present invention will be further explained and described by alternative embodiments.
In an alternative embodiment, the dam-shaped mold 1 includes at least two first mold plates 11 and two second mold plates 12, the two first mold plates 11 are disposed opposite to each other, the two second mold plates 12 are disposed opposite to each other, and two ends of the first mold plates 11 are respectively connected to two ends of the second mold plates 12, so as to form the dam-shaped mold 1 with an upper and lower opening structure. The first and second forms 11 and 12 may be plastic or cast iron plates.
It should be noted that the dam-shaped mold 1 provided in the embodiment of the present invention is a trapezoid structure with a large upper opening and a small lower opening, and the first mold plate 11 and the second mold plate 12 are detachably connected to each other, so as to be conveniently detached after molding.
In an alternative embodiment, the first die plate 11 has die line holes 101 therein and the second die plate 12, the die line holes 101 in the first die plate 11 being located in the same horizontal plane as the die line holes 101 in the second die plate 12.
In an alternative embodiment, support assembly 2 includes a support wire 21, and support wire 21 shuttles through the die wire holes 101 to support sensors 3.
In an alternative embodiment, the support assembly 2 further comprises a connection line 31 for the sensors 3 for connecting a plurality of sensors 3. Further, connection wire slots 32 are provided on the first template 11 and the second template to pass the connection wires 31 therethrough.
According to the sensor 3 provided by the embodiment of the invention, the sensor 3 is limited from three degrees of freedom, namely horizontal and vertical, through the wire net formed by the supporting steel wires 21, so that the fixed-point burying accuracy of the sensor 3 is ensured while the single sensor 3, even a sensor string, is prevented from being pushed, turned and damaged in the sliding mode paving process.
The number of the sensors 3 provided by the embodiment of the present invention may be 2, 3, 4, and the like, and the number of the sensors 3 provided by the embodiment of the present invention is not limited thereto.
In the embodiment of the invention, the concrete dam body 5 with certain strength is formed by using concrete used for paving a road surface in a mode of erecting a mold, and a wire mesh is formed by matching with 0.7mm thin steel wires for limiting, so that the diameter and the number of steel bars implanted into the road surface are reduced, and the influence of implanted redundant steel bars on the whole structure of the concrete road surface is reduced.
In an alternative embodiment, the first template 11 and the second template 12 have a limiting hole 102, and the support assembly 2 further includes a limiting steel wire 22, wherein the limiting steel wire 22 limits the sensor 3 through the limiting hole 102.
Further, the height of the position of the limiting hole 102 on the first template 11 and the second template 12 may be the same, so as to improve the fixing effect on the sensor 3.
In an alternative embodiment, the in situ formwork erecting step includes determining a time to set the formwork assembly in advance based on a construction speed and a paving direction of the paving, and an initial setting time of concrete used for the paving.
Further, the time for erecting the mold in advance is determined based on the construction speed of slipform paving, the initial setting time of the cement concrete material used for paving and the like, and the mold assembly is placed on site. Meanwhile, the position of the vertical model is determined based on the position to be embedded of the sensor 3; for example, the model is placed on an asphalt layer of the cement concrete pavement to be paved 1 hour in advance.
In an alternative embodiment, the concrete pouring step further includes pressing the concrete in the dam mold 1 to make the concrete filled tightly.
Concrete is paved on the pavement and slowly poured from the opening of the dam-shaped mold 1, the wire mesh formed by the sensor 3 and the limiting steel wire 22 can cause concrete blockage in the pouring process, and the blocked concrete can be dredged manually until the dam-shaped mold 1 is completely filled with the concrete. Further, a small vibrating rod may be inserted into the interior of the dam mold 1 to vibrate and compact the concrete filler. The bottom of the dam-shaped die 1 is pressed, and a wire hole 101 of the die and a connecting wire 31 wire groove of the sensor 3 are plugged, so that slurry leakage in the vibrating process is prevented.
In an alternative embodiment, in the demolding step, after the concrete in the dam-shaped mold 1 has certain strength, the limiting steel wires 22 used for limiting in the front and rear wire holes and on the two sides of the dam-shaped mold 1 are cut off, then the periphery of the dam-shaped mold 1 is beaten by a rubber hammer to loosen the dam-shaped mold 1, and finally the dam-shaped mold 1 is pulled out from the ground to expose the concrete dam body 5.
In an alternative embodiment, the filling of the formed concrete dam 5 on both sides in the peripheral processing step further comprises filling the formed concrete dam 5 on both sides with concrete for paving.
After the method provided by the embodiment of the invention is used for on-site formwork erection and formwork removal, the dam-shaped mould 1 is concrete for paving a road surface, and the interface coupling performance of the dam-shaped mould 1 and the concrete is enhanced.
In an alternative embodiment, the filling of the formed concrete dam 5 on both sides in the peripheral processing step includes gradually decreasing the height of the formed concrete dam 5 in the paving direction of the paver 4.
In an alternative embodiment, the filling of both sides of the formed concrete dam 5 in the perimeter treatment step comprises that the height of the concrete dam 5 on the side of the concrete dam 5 close to the spreader 4 is higher than the height of the concrete dam 5 on the side far from the spreader 4.
The method provided by the embodiment of the invention can be popularized to the installation of various sensors 3 which are not limited by the types, sizes and numbers of the sensors 3, can be popularized to manual paving and three-roller construction, and can be popularized to asphalt concrete paving and compacting, fabricated concrete sensor 3 implantation and the like.
The method provided by the embodiments of the present invention will be further described below by way of alternative embodiments.
Taking the example that 1 sensor 3 strings consisting of 5 sensors with the diameter of 6cm, the thickness of 3cm and the distance of 24cm are buried and the buried depth of 20cm is taken as an example, the dam-shaped die 1 is 136cm long, the upper opening width is 20cm, the lower bottom width is 30cm and the height is 30cm, the size of the die wire hole 101 is a round hole with the diameter of 5mm, and the used limiting steel wire 22 is a binding wire with the diameter of 0.7 mm.
Referring to fig. 6-7, the embedding method includes the following steps:
s1, molding: before construction begins, preparing two first templates 11 and two second templates 12, wherein the two first templates 11 and the two second templates 12 can be wood boards, plastic boards or cast iron boards, drilling holes with the die line holes 101 of 0.5mm in the fixed height of the first templates 11 and the second templates 12, and finally connecting the first templates 11 and the two second templates 12 to form the dam-shaped die 1 with an upper opening and a lower opening; the position and height of the mold wire holes 101 can be adjusted according to the sensors 3 to be embedded in the road surface.
S2: the sensor 3 is placed and fixed: after the dam-shaped die 1 is manufactured, 0.7mm thin steel wires are used for threading based on the die wire holes 101 in the dam-shaped die 1, after the die wire holes 101 on the periphery are threaded, a limiting wire net is formed inside the dam-shaped die 1, the sensors 3 are sequentially placed, the connecting wires 31 of the sensors 3 are led out from the wire grooves of the connecting wires 31 of the sensors 3 on one side of the dam-shaped die 1, and the sensors 3 are fixed and placed. For some sensors 3, the winding of the top of the sensor 3 can be re-used with 0.7mm thin steel wire.
S3: erecting a mold on site: the sensor 3 is brought to the road surface to be paved together with the dam-shaped mold 1, and the position of the vertical mold is determined based on the position to be embedded of the sensor 3; and determining the time for erecting the model in advance based on the construction speed and the paving direction of the slip form paving, the initial setting time of the concrete used for paving and the like, and placing the model on an asphalt layer of the cement concrete pavement to be paved 1 hour in advance.
S4: pouring and vibrating concrete: concrete is paved on the pavement, the concrete is slowly poured from the upper opening of the dam-shaped mould 1, the sensor 3 and the limiting steel wire 22 can cause concrete blockage in the pouring process, and the blocked concrete can be dredged manually until the concrete completely fills the test mould. And then a small vibrating rod is inserted into the dam-shaped die 1 to vibrate to compact the filler. This step can be pressed the examination mould bottom to carry out the shutoff to mould line hole 101 and 3 connecting wire 31 wire casings of sensor, prevent to vibrate in-process and run thick liquid.
S5: demolding: when the concrete in the dam-shaped mould 1 has certain strength, firstly cutting off thin steel wires used for limiting in the wire holes on the two sides and the front and back surfaces of the dam-shaped mould 1, then beating the periphery of the mould by using a rubber hammer to loosen the mould, and finally extracting a dam-shaped test mould from the ground to expose a concrete dam body 5;
s6: peripheral treatment: after demolding is finished, the two sides of the formed concrete dam 5 are filled with concrete for paving, the height of the formed concrete dam 5 is gradually reduced along the paving direction of the paver 4 (namely the arrow direction in fig. 6 and 7) in the filling process, and the height of the concrete dam 5 close to the side of the paver 4, which is the concrete dam 5, is higher than the height of the concrete dam 5 far away from the side of the paver 4. And finally, leading the connecting wire 31 of the sensor 3 out of one side of the pavement to be paved from the side edge, and paving the pavement by the paver 4 after the pavement material is paved by the concrete spreader, so that the pavement can be buried in the cement concrete pavement.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for embedding a front-mounted sensor based on sliding mode paving, the method comprising embedding using a front-mounted sensor embedding device based on sliding mode paving, the device comprising:
the mold assembly is used for being placed in the ground when a road surface is paved, and comprises at least one group of dam-shaped molds, wherein the dam-shaped molds are of an upper opening structure and a lower opening structure;
the supporting component is connected with the dam-shaped mould and is used for supporting the sensor;
concrete filled in the dam-shaped mould;
the method comprises the following steps:
molding: before paving construction begins, preparing a mould assembly according to the height of the embedded sensor;
fixing: placing the sensor in the mold assembly and securing with the support assembly;
erecting a mold on site: determining a position of the mold assembly based on a position at which the sensor is to be embedded;
pouring concrete: pouring concrete into the pavement from an upper opening of the dam-shaped mold to spread the concrete;
demolding: when the concrete in the dam-shaped mold has certain strength, the dam-shaped mold is pulled out from the ground to expose the concrete dam body;
peripheral treatment: and after demolding is finished, filling the two sides of the formed concrete dam body, and then filling the upper part of the concrete dam body.
2. The method for burying the front-mounted sensor based on sliding mode paving of claim 1, wherein the dam-shaped mold comprises at least two first mold plates and two second mold plates, the two first mold plates are arranged oppositely, the two second mold plates are arranged oppositely, and two ends of the first mold plate are respectively connected with two ends of the second mold plate to form the dam-shaped mold with an upper opening structure and a lower opening structure.
3. The method for burying a forward sensor based on sliding mode paving of claim 2, wherein said first template and said second template have mold wire holes, and wherein said mold wire holes of said first template and said mold wire holes of said second template are located at the same horizontal plane.
4. The slipform paving based front-mounted sensor burying method of claim 3, wherein said support assembly comprises a support steel wire that is shuttled through said mold wire hole to support said sensor.
5. The forward sensor burying method based on sliding mode paving of claim 3, wherein said first template and said second template have limiting holes, and said support assembly further comprises a limiting steel wire, said limiting steel wire limiting said sensor through said limiting holes.
6. The forward sensor burying method based on sliding mode paving of claim 1, wherein the on-site formwork erecting step includes determining the timing of setting up the mould assembly in advance based on the construction speed and paving direction of the paving, and the initial setting time of the concrete used for paving.
7. The method for burying the front-mounted sensor based on the sliding form paving of claim 1, wherein the concrete pouring step further comprises pressing the concrete in the dam-shaped mold to enable the concrete to be filled compactly.
8. The method of burying a forward sensor according to claim 1, wherein said step of peripherally processing filling both sides of the formed concrete dam further comprises filling both sides of the formed concrete dam with concrete for paving.
9. The method for burying a front sensor based on slipform paving of claim 1, wherein the step of filling both sides of the formed concrete dam in the peripheral processing step comprises gradually lowering the height of the formed concrete dam in the paving direction of the paver.
10. The method for burying a front-mounted sensor based on sliding form paving of claim 9, wherein the step of filling both sides of the formed concrete dam in the peripheral processing step comprises the step of filling the concrete dam at a height closer to the side of the paving machine than at a height farther from the side of the paving machine.
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| CN202210332757.5A CN114808620B (en) | 2022-03-31 | 2022-03-31 | Front-mounted sensor embedding method based on sliding mode paving |
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| CN107401104B (en) * | 2017-09-08 | 2019-04-30 | 垠星建设有限公司 | Municipal concrete road surface slip form construction device and construction method |
| JP7151192B2 (en) * | 2018-06-11 | 2022-10-12 | 愛知製鋼株式会社 | Installation method of magnetic marker |
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