CN112144352A - Leveling machine for leveling ultrahigh-performance concrete and application method thereof - Google Patents
Leveling machine for leveling ultrahigh-performance concrete and application method thereof Download PDFInfo
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- CN112144352A CN112144352A CN202011161091.9A CN202011161091A CN112144352A CN 112144352 A CN112144352 A CN 112144352A CN 202011161091 A CN202011161091 A CN 202011161091A CN 112144352 A CN112144352 A CN 112144352A
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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
- E01C19/22—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 consolidating or finishing laid-down unset materials
- E01C19/42—Machines for imparting a smooth finish to freshly-laid paving courses other than by rolling, tamping or vibrating
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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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/01—Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
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Abstract
The invention relates to the technical field of thin-layer ultrahigh-performance concrete construction, in particular to a leveling machine for leveling ultrahigh-performance concrete and an application method thereof. The invention has the advantages that: the problems of poor bridge deck pavement flatness, low concrete compactness, artificial errors in manual measurement, large elevation errors and the like are solved, the overall attractiveness is achieved, the cost is reduced, and the leveling efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of thin-layer ultrahigh-performance concrete construction, in particular to a leveling machine for leveling ultrahigh-performance concrete and an application method thereof.
Background
The ultra-high performance concrete is a cement-based material, and a material system is systematically designed, optimized and adjusted by utilizing the particle tight packing theory, the fracture mechanics and the micro-mechanics principle, and fibers with the volume ratio of 1-3 are added. The ultra-high performance concrete can obviously improve the tensile capacity and the shear resistance of the concrete, so the ultra-high performance concrete has good toughness, can effectively control the development of the concrete, and is gradually applied to actual engineering. The application of ultra-high performance concrete will change the traditional design and will introduce new construction techniques. Compared with the traditional concrete pavement, the ultra-high performance concrete pavement has great advantages, and the safety requirement is naturally higher, for example, the exposed steel fibers after the pavement is worn can cause the tire to break, and the traffic safety is damaged. Leveling is an important link of the construction of the ultra-high performance concrete pavement, and the stability and the safety of the pavement are ensured by fully considering the specific requirements of half of the pavement leveling and combining the actual characteristics of the ultra-high performance concrete.
In addition, the ultra-high performance concrete is particularly suitable for important structures such as a steel box girder composite structure, but a series of construction key problems also exist in the actual construction process, for example, because the UHPC water cement ratio is low (lower than 0.2), the viscosity is large, the working time is short, the leveling is difficult after the material distribution process is finished, the material is sensitive to temperature and humidity in the construction, the material contains steel fibers, the pavement needs to be plastered and embossed, the phenomenon that the steel fibers are brought out is avoided to the maximum extent, and meanwhile, the phenomenon that the tires are punctured by the exposed steel fibers cannot occur after the pavement is worn. The ultra-high performance concrete is difficult to level by a conventional method, and particularly the coagulation property of the concrete makes the conventional leveling equipment and process difficult to meet the requirements of large-area, high-efficiency, high-precision, high-quality and uniform paving.
The common paving construction of the ultra-high performance concrete bridge mostly adopts a method of leveling by matching a leveling machine with manual leveling. The common concrete leveling method has the disadvantages that the control of the pavement thickness is not precise enough, the error between the actual elevation and the designed elevation is overlarge, the quality, the effect and the continuity of the construction process are difficult to ensure, and the popularization and the application of the ultra-high performance concrete are hindered. In recent years, mechanical automatic leveling has attracted certain attention, and some technological methods for performing ultrahigh-performance concrete construction by using mechanical equipment appear in the market. But their leveling is not yet mature.
At present, a few manufacturers use an ultra-high performance concrete leveling machine for leveling, but the leveling effect is not ideal, and the problems are mainly that the leveling method in the prior art has the defects of poor anti-interference capability, low leveling precision, low efficiency and the like when the ultra-high performance concrete is leveled. Before the flattening, according to the design requirement, manual adjustment flattening board height to design thickness value, the flattening in-process, the manual measurement flattening thickness, if thickness can not reach the design value, the evener is shut down, resumes the flattening behind the manual adjustment flattening board height. When the method is used for paving and constructing the large-area continuous thin-layer ultra-high-performance concrete, the method has the obvious defects that: real-time adjustment of the leveling thickness cannot be performed according to the linear change of the bridge deck. At intervals, manual measurement and adjustment are required. The time waste caused by the adjustment of the leveling thickness during each shutdown can increase the workability of the ultra-high performance concrete, which causes discontinuous construction and affects the overall quality.
Disclosure of Invention
The invention aims to provide a leveling machine for leveling ultra-high performance concrete and an application method thereof, which can accurately adjust the heights of the left side and the right side of a leveling plate through a height measuring device and ensure the leveling of the ultra-high performance concrete layer according to the defects of the prior art.
The purpose of the invention is realized by the following technical scheme:
a evener for ultra-high performance concrete leveling characterized in that: including installing the frame on the walking track, the left and right sides of frame bottom all is equipped with walks capable wheel, it connects in walking motor to walk capable wheel, the frame passes through walking motor drive it can to walk the motion of capable wheel the walking track is gone up to remove, the frame bottom still is equipped with screed and flattening board, the left and right sides of flattening board all is connected with a flattening board elevating gear, two flattening board elevating gear drives respectively the elevating movement is done on the left and right sides of flattening board, the side is equipped with a height measuring device respectively to the symmetry about the frame, two height measuring device with walking track top is equal altitude setting, stroke measuring device is installed to the frame lateral part.
The walking motor, the leveling plate lifting device, the height measuring device and the stroke measuring device are all connected to a control device.
And a certain distance is reserved between the height measuring device and the outer edge of the concrete pavement in the horizontal direction.
The height measuring device is a wireless distance measuring device.
An application method of a leveling machine for leveling ultra-high performance concrete is characterized in that: the method comprises the following steps:
a. arranging the walking track on a walking track base, and installing the leveling machine on the walking track;
b. the walking motor drives the leveling machine to move on the walking tracks, monitoring points are arranged at intervals of a fixed distance from the moving starting point of the leveling machine, the height measuring device measures and records the distance between the walking track on each monitoring point and a steel bridge deck, and transmits the distance information between the walking track and the steel bridge deck to the control device, wherein the moving starting point of the leveling machine is also the monitoring point;
c. paving, vibrating, lifting and leveling the concrete material through the ironing plate pair, and ironing the concrete material to form a concrete layer;
d. inputting a target leveling thickness value of the concrete layer in the control device, starting from a movement start point of the screed, the control device adjusting the left and right side heights of the screed in real time by controlling the movements of the two screed lifts, and recording the walking stroke of the screed and the accumulated height adjustment value of the screed in real time during the movement of the screed, wherein the screed is accurately moved to the next monitoring point by the stroke measuring device;
e. when the leveling machine moves to the next monitoring point, zeroing the traveling stroke of the previous leveling machine and the accumulated height adjustment value of the leveling plate, and restarting the measurement, wherein the relationship between the height adjustment value of the leveling plate and the traveling stroke of the leveling machine is as follows: Δ Hi=（Hi+1-Hi）×S/L0- Δ SH, wherein Δ HiFor the height adjustment value of the screed left or right, Hi+1、HiThe distance between the left side or the right side of the walking track and the steel bridge deck, S is the walking stroke of the leveling machine, and L is the distance between the left side or the right side of the walking track and the steel bridge deck0The delta SH is the accumulated height adjustment value of the left side or the right side of the leveling plate as the distance between every two adjacent monitoring points;
f: and e, repeating the step e until the concrete layer is leveled.
The invention has the advantages that: compared with the traditional manual leveling operation, the leveling precision is several times higher, the leveling efficiency is greatly improved, and the leveling appearance quality and the leveling inner quality are higher; the problems of poor bridge deck pavement flatness, low concrete compactness, human error in manual measurement, large elevation error and the like are solved, the overall attractiveness is realized, the cost is reduced, the leveling efficiency is greatly improved, the efficient operation of a system is realized, the information is digitalized, the labor cost is reduced, and the method can be used in the field of ultra-high performance concrete construction; by changing the engineering practice, the popularization and application of the automatic leveling technology in the building engineering fields of bridge engineering, industrial plants, exhibitions and the like provide valuable reference experience.
Drawings
FIG. 1 is a schematic view of the construction of the screed machine of the present invention;
FIG. 2 is a schematic view of the synchronous measurement of the height measuring device of the present invention;
FIG. 3 is a schematic view of an independent measurement of the height measuring device of the present invention;
FIG. 4 is a schematic illustration of the screed process of the screed machine of the present invention;
FIG. 5 is a schematic view of the flattening mechanism of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-4, the scores are represented as: the system comprises a walking track 1, a walking motor 2, a screed plate 3, a screed plate 4, a screed plate lifting device 5, a height measuring device 6, a stroke measuring device 7, a control device 8, a rack 9, a walking track base 10, a steel bridge deck 11, an outer edge 12 of an ultrahigh-performance concrete pavement surface, an ultrahigh-performance concrete layer 13, a walking track top 14 and a distance L between every two adjacent monitoring points0Leveling thickness target value T0And the distances between the walking track and the steel bridge deck are H, H0, H1, H2, H3 and H4.
Example (b): as shown in fig. 1-4, the present embodiment mainly includes a frame 9, traveling wheels are disposed on both the left and right sides of the bottom of the frame 9, the traveling wheels are connected to a traveling motor 2, a leveling machine is mounted on a traveling rail 1, the leveling machine drives the traveling wheels to move through the traveling motor 2, and can move on the traveling rail 1, wherein the traveling rail 1 is mounted on a traveling rail base 10, and the traveling rail base 10 is disposed on a steel bridge deck 11.
As shown in fig. 1, a screed plate 3 and a screed plate 4 are further disposed at the bottom of the frame 9, and the screed plate 3 and the screed plate 4 are respectively used for ironing and leveling ultra-high performance concrete, wherein the screed plate 3 and the screed plate 4 are respectively connected to a screed plate lifting device 5, and the screed plate lifting device 5 can adjust the heights of the screed plate 3 and the screed plate 4 to meet the leveling requirement of the ultra-high performance concrete. Wherein, the height of the screed plate 3 can be adjusted by the screed lifting device 5, so that it can provide a working surface with an inclined angle.
As shown in fig. 1-4, the left and right sides of the frame 9 are symmetrically provided with a height measuring device 6, the height measuring devices 6 are arranged at the same height as the top 14 of the running rail, and a distance of 0.1-0.5m is left between the height measuring device 6 and the outer edge 12 of the super high performance concrete pavement surface in the horizontal direction. By arranging the track height measuring points provided by the height measuring device 6 in the paving operation surfaces at the two ends of the leveling machine and 0.1-0.5m away from the outer edge of the paving layer, the influence of downwarping and vibration of the leveling equipment on the measuring precision can be avoided under the condition of large span (if the paving width exceeds 10 m) when the measuring points are directly arranged at the positions close to the two ends of the leveling machine.
The height measuring device 6 is a wireless distance measuring device, and can be a laser type, an infrared type or an ultrasonic type, the two height measuring devices 6 are respectively used for measuring the distance between the left side and the right side of the walking track 2 and the steel bridge deck 11, and the measuring work of the two height measuring devices 6 can be carried out synchronously or independently.
In addition, a stroke measuring device 7 is installed at a side of the frame 9, and the stroke measuring device 7 is used to measure a travel distance of the leveler. A speedometer and a timer are arranged in the travel measuring device 7; when the leveling machine is in the walking process, the travel measuring device 7 can measure the longitudinal walking speed v of the leveling machine through the speed measurement thereof, the walking time t of the leveling machine is measured through the timer, and the step length of the measuring time is t0，tnThe cumulative travel L over time is calculated as follows:
as shown in fig. 1, the walking motor 2, the screed lifting device 5 and the height measuring device 6 are all connected to a control device 8, and the control device 8 can control the operations of the walking motor 2, the screed lifting device 5, the height measuring device 6 and the stroke measuring device 7.
In addition, as shown in fig. 1 to 4, the present embodiment also has the following application method:
a. arranging a walking track 1 on a walking track base 10, and installing a leveling machine on the walking track 1;
b. the walking motor 2 drives the walking wheels to move so as to drive the leveling machine to move on the walking track 1 and start from the moving starting point of the leveling machineAt first, every other fixed distance L0Setting a monitoring point, wherein the moving starting point of the evener is also the monitoring point, and the moving starting point of the evener is S0(ii) a The two height measuring devices 6 respectively measure and record the distance H between the left side and the right side of the walking track 1 and the steel bridge deck 11 at each monitoring point, and transmit the information of the distance H between the left side and the right side of the walking track 1 and the steel bridge deck 11 to the control device 8, wherein the distance between the left side of the walking track 1 and the steel bridge deck 11 is ZH in sequence0,ZH1,…,ZHnThe distance between the right side of the walking track 1 and the steel bridge deck 11 is YH in sequence0,YH1,…,YHn；
c. The ultra-high performance concrete is spread, vibrated, extracted and leveled through the ironing plate 3, and then the ultra-high performance concrete is ironed to form an ultra-high performance concrete layer 13;
d. the target value T of the leveling thickness of the ultra-high performance concrete layer 13 is inputted into the control device 80From the start of movement S of the levelling machine0Initially, the control device 8 adjusts the heights of the left and right sides of the screed 4 in real time by controlling the movements of the two screed lifting devices 5, and during the movement of the screed, the control device 8 records the traveling stroke S of the screed and the accumulated height adjustment value Δ SH of the screed 4 (the height adjustment values of the left and right sides of the screed 4) in real time, and the screed is accurately moved to the next monitoring point by the stroke measuring device 7;
e. when the leveler moves to the next monitoring point, the traveling stroke S of the previous leveler and the accumulated height adjustment value DeltaSH of the leveling plate 4 are zeroed and the measurement is restarted, and the height adjustment value DeltaSH of the leveling plate 4 and the traveling stroke DeltaH of the leveling machine 4 are reset to zeroiThe relationship between them is: Δ ZHi=（ZHi+1-ZHi）×S/L0-ΔZSH，ΔYHi=（YHi+1-YHi）×S/L0- Δ YSH, wherein Δ ZHiAnd Δ YHiRespectively, left and right side height adjustment values, ZH, of the screed 4i+1And ZHiIs the distance between the left side of the walking track 1 and the steel bridge deck 11, YHi+1And YHiIs the distance between the right side of the walking track 1 and the steel bridge deck 11, and S is the walking of the leveling machineStroke, L0For the distance between each two adjacent monitoring points, Δ ZSH and Δ YSH are the cumulative height adjustment values for the left and right sides of screed 4, respectively, and during the leveling process, only Δ ZH needs to be adjustediAnd Δ YHiBy a value of (d), the target leveling thickness T can be controlled0；
f: and e, repeating the step e until the leveling of the ultra-high performance concrete layer 13 is completed.
In this embodiment, the leveling machine does not need to find a reference point and to establish a station compared to the conventional CP III measurement method because the walking rail base 10 and the walking rail 1 are disposed on the steel bridge deck 11. In addition, the height measuring devices 6 are arranged at the same height with the top of the walking track 1, so the measuring precision of the height measuring device 6 depends on the mounting precision of the walking track 1 to a great extent, the walking track 1 is simple to mount and has higher mounting precision, the measuring precision of the height measuring device 6 is improved, and the measuring precision is higher than that obtained by directly mounting the height measuring device 6.
In the embodiment, in specific implementation: measuring step length L0Generally, 0.1-2m is selected, and the smaller the measurement step value is, the more the measurement data is relatively, so that the leveling precision is higher. Meanwhile, because the integral bending of the steel bridge deck is obvious in a short distance, the measurement step length L can be avoided as much as possible by controlling the measurement step length0In the case of mutation.
The actual measurement is the distance H between the height measuring device 6 and the steel deck plate 110The vertical distance between the measuring point and the track is HcAnd calculating the distance data H between the walking track and the steel bridge floor, namely H = H0-HcThe advantage of converting the measurement data into the distance H between the walking track and the steel bridge deck is as follows: even if different measuring devices (the measuring devices are not consistent with the distance between the steel bridge faces) are used in different time periods, the calculation and the control of the adjustment of the subsequent leveling flatness are not influenced, and therefore the leveling precision is improved.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, they are not to be considered repeated herein.
Claims (5)
1. A evener for ultra-high performance concrete leveling characterized in that: including installing the frame on the walking track, the left and right sides of frame bottom all is equipped with walks capable wheel, it connects in walking motor to walk capable wheel, the frame passes through walking motor drive it can to walk the motion of capable wheel the walking track is gone up to remove, the frame bottom still is equipped with screed and flattening board, the left and right sides of flattening board all is connected with a flattening board elevating gear, two flattening board elevating gear drives respectively the elevating movement is done on the left and right sides of flattening board, the side is equipped with a height measuring device respectively to the symmetry about the frame, two height measuring device with walking track top is equal altitude setting, stroke measuring device is installed to the frame lateral part.
2. The screed for ultra-high performance concrete screeding of claim 1, wherein: the walking motor, the leveling plate lifting device, the height measuring device and the stroke measuring device are all connected to a control device.
3. The screed for ultra-high performance concrete screeding of claim 1, wherein: and a certain distance is reserved between the height measuring device and the outer edge of the concrete pavement in the horizontal direction.
4. The screed for ultra-high performance concrete screeding of claim 1, wherein: the height measuring device is a wireless distance measuring device.
5. A method of using a screed for ultra high performance concrete screeding using the screed for ultra high performance concrete screeding of any one of claims 1-4, comprising: the method comprises the following steps:
a. arranging the walking track on a walking track base, and installing the leveling machine on the walking track;
b. the walking motor drives the leveling machine to move on the walking tracks, monitoring points are arranged at intervals of a fixed distance from the moving starting point of the leveling machine, the height measuring device measures and records the distance between the walking track on each monitoring point and a steel bridge deck, and transmits the distance information between the walking track and the steel bridge deck to the control device, wherein the moving starting point of the leveling machine is also the monitoring point;
c. paving, vibrating, lifting and leveling the concrete material through the ironing plate pair, and ironing the concrete material to form a concrete layer;
d. inputting a target leveling thickness value of the concrete layer in the control device, starting from a movement start point of the screed, the control device adjusting the left and right side heights of the screed in real time by controlling the movements of the two screed lifts, and recording the walking stroke of the screed and the accumulated height adjustment value of the screed in real time during the movement of the screed, wherein the screed is accurately moved to the next monitoring point by the stroke measuring device;
e. when the leveling machine moves to the next monitoring point, zeroing the traveling stroke of the previous leveling machine and the accumulated height adjustment value of the leveling plate, and restarting the measurement, wherein the relationship between the height adjustment value of the leveling plate and the traveling stroke of the leveling machine is as follows: Δ Hi=（Hi+1-Hi）×S/L0- Δ SH, wherein Δ HiFor the height adjustment value of the screed left or right, Hi+1、HiThe distance between the left side or the right side of the walking track and the steel bridge deck, S is the walking stroke of the leveling machine, and L is the distance between the left side or the right side of the walking track and the steel bridge deck0The delta SH is the accumulated height adjustment value of the left side or the right side of the leveling plate as the distance between every two adjacent monitoring points;
f: and e, repeating the step e until the concrete layer is leveled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011161091.9A CN112144352A (en) | 2020-10-27 | 2020-10-27 | Leveling machine for leveling ultrahigh-performance concrete and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011161091.9A CN112144352A (en) | 2020-10-27 | 2020-10-27 | Leveling machine for leveling ultrahigh-performance concrete and application method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202021A (en) * | 2021-04-19 | 2021-08-03 | 上海城建市政工程（集团）有限公司 | Method for erecting track for paving ultrahigh-performance concrete on bridge steel bridge deck |
| CN113202031A (en) * | 2021-04-19 | 2021-08-03 | 上海城建市政工程（集团）有限公司 | Method for paving ultrahigh-performance concrete on bridge steel bridge deck |
| CN114319019A (en) * | 2021-12-31 | 2022-04-12 | 中交路桥建设有限公司 | Municipal pipe network sand cushion layer paving and leveling device |
-
2020
- 2020-10-27 CN CN202011161091.9A patent/CN112144352A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202021A (en) * | 2021-04-19 | 2021-08-03 | 上海城建市政工程（集团）有限公司 | Method for erecting track for paving ultrahigh-performance concrete on bridge steel bridge deck |
| CN113202031A (en) * | 2021-04-19 | 2021-08-03 | 上海城建市政工程（集团）有限公司 | Method for paving ultrahigh-performance concrete on bridge steel bridge deck |
| CN114319019A (en) * | 2021-12-31 | 2022-04-12 | 中交路桥建设有限公司 | Municipal pipe network sand cushion layer paving and leveling device |
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