CN114319248B - Concrete dam bin surface maintenance method - Google Patents
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- CN114319248B CN114319248B CN202210007476.2A CN202210007476A CN114319248B CN 114319248 B CN114319248 B CN 114319248B CN 202210007476 A CN202210007476 A CN 202210007476A CN 114319248 B CN114319248 B CN 114319248B
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- 239000004567 concrete Substances 0.000 title claims abstract description 253
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000012423 maintenance Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 230000008569 process Effects 0.000 claims abstract description 18
- 230000008859 change Effects 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims description 61
- 230000005855 radiation Effects 0.000 claims description 33
- 238000003860 storage Methods 0.000 claims description 33
- 238000011156 evaluation Methods 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 7
- 238000000889 atomisation Methods 0.000 claims description 4
- 238000002309 gasification Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000001723 curing Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 239000011382 roller-compacted concrete Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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Abstract
The embodiment of the invention discloses a concrete dam bin surface maintenance device and method, which belong to the technical field of concrete dam maintenance and comprise a concrete dam body, wherein a concrete bin is arranged at the top of the concrete dam body, a first temperature sensor is arranged in the concrete bin, and a second temperature sensor is arranged on the surface of the concrete bin. According to the invention, through the corresponding cooperation of each structure, the temperature information measured by the sensor and the target air temperature information are used, a corresponding temperature change process line is established, whether the calculated internal and external temperature difference stress of the concrete bin meets the standard requirement of the poured concrete bin is judged, the device is ensured not to influence the concrete construction process and the mixing ratio of the concrete, no water accumulation on the bin surface can be realized, the internal and external temperature difference is further ensured to be in a reasonable range, the exceeding of the ambient temperature in the bin is prevented, the target air temperature information can be selectively corrected according to the judging result, the installation is convenient, and the maintenance of the concrete bin can be realized efficiently and automatically.
Description
Technical Field
The embodiment of the invention relates to the technical field of concrete dam maintenance, in particular to a method and a method for maintaining a bin surface of a concrete dam.
Background
The concrete dam is a dam formed by casting or rolling concrete or assembling precast concrete blocks, and the structural characteristics can be divided into a gravity dam, a large head dam and an arch dam; the construction characteristics can be divided into a normal concrete dam, a roller compacted concrete dam and an assembled concrete dam according to whether overflow is carried out through a dam top or not, the concrete dam can be divided into a non-overflow concrete dam and an overflow concrete dam according to whether overflow is carried out through the dam top, a water discharge hole can be arranged in the middle of a dam body in a water discharge mode of the concrete dam, so that flood can be quickly pre-discharged before coming, or a water discharge hole is arranged at the bottom of the dam body, so that the water level of a warehouse is reduced or sand flushing is carried out.
The maintenance of the warehouse surface is one of important links for cracking resistance in the construction process of the large-volume concrete, and engineering practice shows that the concrete is covered by another layer of concrete from warehouse entry, so that the temperature of the concrete is greatly raised, the casting temperature and the highest temperature are difficult to control, and the conventional warehouse surface temperature control method comprises a warehouse surface covering heat preservation quilt, a warehouse surface building sunshade, warehouse surface spraying and the like;
at present, according to the engineering experience of the complaint, the defects of difficult arrangement and inconvenient construction of the warehouse surface temperature control mode are found in the construction process, the normal work of various engineering machines such as a cable machine, a large-scale portal crane and the like is interfered, meanwhile, due to the installation environment of a concrete dam, the influence of wind is large, the fixation is difficult, and the safety is poor.
Disclosure of Invention
Therefore, the embodiment of the invention provides a concrete dam bin surface maintenance method and method, which are used for solving the defects of difficult arrangement and inconvenient construction in the prior art, interfering the normal work of various engineering machinery such as cable machines, large-scale door machines and the like, and simultaneously solving the problems of great influence of wind, difficult fixation and poor safety due to the installation environment of the concrete dam.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: the concrete dam bin surface maintenance method comprises a concrete dam main body, wherein a concrete bin is arranged at the top of the concrete dam main body, a first temperature sensor is arranged in the concrete bin, a second temperature sensor is arranged on the surface of the concrete bin, an air temperature sensor is arranged on one side of the surface of the top of the concrete bin, a solar radiation instrument is arranged at the top of the concrete bin, and a wind speed sensor is arranged on one side of the solar radiation instrument;
the concrete bin is characterized in that diversion boxes are arranged on two sides of the surface of the concrete bin, a plurality of supporting tubes are arranged on the upper surface of each diversion box, and atomizing nozzles are arranged at one ends of the supporting tubes.
Further, a storage box is arranged at one end of the top of the concrete dam body, guide pipes are arranged at one ends of the two guide boxes, and one end of each guide pipe is communicated with the storage box.
Further, one side of the storage box is provided with water supply equipment, the output end of the water supply equipment is communicated with the storage box through a hose, and one end, close to the storage box, of the diversion box is provided with a water temperature sensor.
Further, the mounting groove has been seted up to one side of concrete dam main part, be provided with the protective housing in the mounting groove, the protective housing passes through the bolt to be installed in the mounting groove.
Further, a data acquisition unit is arranged in the protective box, an evaluation unit is arranged on one side of the data acquisition unit, and a control unit is arranged on one side of the evaluation unit.
Further, the data acquisition unit is connected with the first temperature sensor, the second temperature sensor, the air temperature sensor, the solar radiation instrument, the wind speed sensor and the water temperature sensor through wires respectively.
Further, the control unit is connected with the water supply equipment and the data acquisition unit through wires respectively.
The curing method of the concrete dam bin surface curing method specifically comprises the following steps:
step one, a step one; firstly, a worker installs a first temperature sensor, a second temperature sensor, an air temperature sensor, a solar radiation instrument and an air speed sensor at a designated position according to actual demands, and installs each structure of a diversion box, a supporting pipe and an atomizing nozzle on two sides of the surface of a concrete bin according to the actual demands;
step two, a step two is carried out; acquiring concrete bin surface temperature information, concrete bin internal temperature information, concrete bin upper air temperature information, concrete bin upper solar radiation power information, concrete bin upper air flow velocity information, wind speed grade information and water temperature information corresponding to a concrete bin through the mutual cooperation of a first temperature sensor, a second temperature sensor, an air temperature sensor, a solar radiation instrument, a wind speed sensor and a water temperature sensor;
step three, a step of performing; acquiring the spraying amount per minute required by the concrete bin according to the acquired information and the target air temperature information corresponding to the preset concrete bin, guiding an external water source into a storage box through water supply equipment according to the spraying amount per minute, guiding the water in the storage box into a diversion box through a diversion pipe respectively, spraying through an atomization spray head, uniformly spraying the surface of the concrete bin, and acquiring the spraying amount per minute required by the concrete bin through a control unit;
in the formula, Q is the spraying amount per minute required by the concrete bin, T 1 For the temperature information above the concrete bin before spraying, T 2 Is the target air temperature information of the preset concrete warehouse surface, T 3 T is the temperature information in the concrete bin 2 Is concreteBin surface temperature information, t Water and its preparation method C is the water temperature information Empty space For specific heat capacity of air, v Wind power Is the air flow velocity information and the wind speed grade information above the concrete bin, ρ Empty space The method comprises the steps that the air density is w, the width of a concrete bin surface is w, the length of the concrete bin surface is L, the distance between a spray nozzle and the concrete bin surface is h, wind is wind speed grade information above the concrete bin, L is preset average gasification latent heat of water particles, and P is solar radiation power information above the concrete bin during spraying;
step four, a step four is carried out; the temperature field model of the concrete bin is built according to the air temperature information acquired by the air temperature sensor through the evaluation unit, so that the temperature value of each position point in the concrete bin is obtained, and the temperature value of each position point in the concrete bin is obtained according to the obtained temperature value;
step five, a step of performing a step of; correcting target air temperature information according to the temperature difference stress inside and outside the concrete bin, re-acquiring the spraying amount per minute required by the concrete bin according to the corrected target air temperature information, and uniformly spraying the surface of the concrete bin according to the acquired spraying amount per minute;
in the above formula, the temperature difference stress inside and outside the concrete bin is calculated, wherein sigma is the temperature difference stress inside and outside the concrete bin, K is a stress relaxation coefficient caused by preset creep, alpha is a preset linear expansion coefficient, mu is poisson ratio, E is the elastic modulus of the concrete, T (y) is a temperature value at a stress calculation point y in the temperature field model, A (epsilon) is a positive stress influence coefficient generated for the calculation point y when a pair of unit loads F=epsilon are added at the calculation point y=epsilon, T (epsilon) is a temperature value of the stress calculation point epsilon in the temperature field model, and deltay is an increment of the stress calculation point y in the temperature field model;
step six, a step of performing a step of; the temperature information and the target air temperature information measured by the sensors can be firstly established, a corresponding temperature change process line is established, whether the calculated internal and external temperature difference stress of the concrete bin meets the standard requirement of the poured concrete bin or not is judged, the standard requirement can be a national unified standard, when the internal and external temperature difference stress of the concrete bin meets the standard requirement, the previous spraying amount per minute is continuously maintained, if the standard requirement is not met, the target air temperature information is corrected according to the change trend of the temperature process line corresponding to the target air temperature information, the spraying amount per minute required by the concrete bin is obtained again according to the corrected target air temperature information, the concrete bin is sprayed according to the spraying amount per minute, and the maintenance of the concrete bin surface is repeatedly realized.
The embodiment of the invention has the following advantages:
1. according to the invention, through the corresponding matching use of the first temperature sensor, the second temperature sensor, the air temperature sensor, the solar radiation instrument, the wind speed sensor and the water temperature sensor, the target air temperature information can be corrected according to the internal and external temperature difference stress of the concrete bin, whether the internal and external temperature difference stress of the concrete bin meets the preset standard requirement is judged, meanwhile, the target air temperature information can be selectively corrected according to the judging result, the installation is convenient, and the maintenance of the concrete bin can be realized efficiently and automatically;
2. when the invention is used, the diversion box, the supporting pipe and the atomizing nozzle which are arranged at the outer side of the concrete bin ensure that the device does not influence the concrete construction process and the mixing ratio of concrete, and meanwhile, the device is sprayed in an atomizing mode, so that the water accumulation on the bin surface can be avoided, the temperature difference between the inside and the outside is ensured to be in a reasonable range, and the exceeding of the ambient temperature in the bin is prevented;
3. in the curing process, when the temperature difference stress in and out of the concrete bin meets the standard requirement, continuously maintaining the previous spraying amount per minute, if the temperature difference stress does not meet the standard requirement, correcting the target air temperature information according to the change trend of a temperature process line corresponding to the target air temperature information, re-acquiring the spraying amount per minute required by the concrete bin according to the corrected target air temperature information by a method shown in a graph, spraying the concrete bin according to the spraying amount per minute, and repeating the steps to realize curing of the concrete bin surface;
in summary, through the corresponding cooperation of each structure, temperature information and target air temperature information that the sensor measured establish corresponding temperature change process line, judge whether the interior outer difference in temperature stress of concrete storehouse that calculates accords with the standard requirement of pouring concrete storehouse, ensure that the device does not influence concrete work progress and the mix proportion of concrete, can realize that the storehouse face does not water, and then ensure that inside and outside difference in temperature is in reasonable scope, prevent that the interior ambient temperature of storehouse exceeds standard, can correct target air temperature information according to the judgement result selectivity simultaneously, it is convenient to install, can high-efficient automation realize the maintenance of concrete storehouse.
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 will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a front view of the overall partial structure of the present invention;
FIG. 3 is a schematic view of the partial structure of the portion A in FIG. 1 according to the present invention;
FIG. 4 is a top view of a partial structure of the baffle box, support tube and atomizer of the present invention;
FIG. 5 is a front view showing the internal structure of the protective case of the present invention;
FIG. 6 is a front view of the baffle box, support tube and atomizer of the present invention;
FIG. 7 is a flowchart of the overall operation steps of the present invention;
in the figure: 1. a concrete dam body; 2. a concrete bin; 3. a first temperature sensor; 4. a second temperature sensor; 5. an air temperature sensor; 6. a solar radiation instrument; 7. a wind speed sensor; 8. a diversion box; 9. a support tube; 10. an atomizing nozzle; 11. a storage box; 12. a flow guiding pipe; 13. a water supply device; 14. a mounting groove; 15. a protective box; 16. a data acquisition unit; 17. an evaluation unit; 18. a control unit; 19. a water temperature sensor.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The concrete dam bin surface maintenance method comprises a concrete dam main body 1, wherein a concrete bin 2 is arranged at the top of the concrete dam main body 1, a first temperature sensor 3 is arranged in the concrete bin 2, a second temperature sensor 4 is arranged on the surface of the concrete bin 2, an air temperature sensor 5 is arranged on one side of the top surface of the concrete bin 2, a solar radiation instrument 6 is arranged at the top of the concrete bin 2, and an air speed sensor 7 is arranged on one side of the solar radiation instrument 6.
The two sides of the surface of the concrete bin 2 are respectively provided with a diversion box 8, the upper surface of the diversion box 8 is provided with a plurality of supporting pipes 9, and one ends of the supporting pipes 9 are respectively provided with an atomization nozzle 10.
The implementation scene is specifically as follows:
firstly, a worker installs a first temperature sensor 3 at the bottom of the inner wall of a concrete bin 2, installs a second temperature sensor 4 on the surface of the concrete bin 2, installs an air temperature sensor 5 at one end of the surface of the concrete bin 2, installs a solar radiation instrument 6 and an air velocity sensor 7 at the top of the concrete bin 2, installs two diversion boxes 8 at two sides of the surface of the concrete bin 2 respectively, installs a proper number of supporting tubes 9 and atomizing spray heads 10 at the top of the two diversion boxes 8 according to actual requirements, and in the using process, uses the corresponding coordination of the first temperature sensor 3, the second temperature sensor 4, the air temperature sensor 5, the solar radiation instrument 6, the air velocity sensor 7 and the water temperature sensor 19 to collect the surface temperature information of the concrete bin 2, the internal temperature information of the concrete bin 2, the air temperature information above the concrete bin 2, the solar radiation power information above the concrete bin 2, the air velocity information above the concrete bin 2 and the air velocity information and the air velocity level information and the water velocity information.
Referring to fig. 2, 3 and 6, a storage tank 11 is arranged at one end of the top of the concrete dam body 1, a flow guide pipe 12 is arranged at one end of each of the two flow guide tanks 8, one end of the flow guide pipe 12 is communicated with the storage tank 11, the storage tank 11 can store water, water circulation is facilitated, the flow guide pipe 12 can guide water in the storage tank 11, water in the storage tank 11 is conveniently guided into the flow guide tank 8 through the flow guide pipe 12, and use is facilitated.
Referring to fig. 2, 3 and 6, a water supply device 13 is disposed on one side of the storage tank 11, an output end of the water supply device 13 is communicated with the storage tank 11 through a hose, a water temperature sensor 19 is disposed on one end, close to the storage tank 11, of the guide tank 8, the water supply device 13 can play a driving role, external water flow is conveniently led into the storage tank 11, and the water temperature sensor 19 can play a role in detecting water temperature and measure water temperature information.
Referring to fig. 1, a mounting groove 14 is formed in one side of a concrete dam body 1, a protection box 15 is arranged in the mounting groove 14, the protection box 15 is mounted in the mounting groove 14 through bolts, and the mounting groove 14 has a limiting function, so that convenience in mounting the protection box 15 is improved when workers mount the protection box 15.
Referring to fig. 5, a data acquisition unit 16 is arranged in the protective box 15, an evaluation unit 17 is arranged on one side of the data acquisition unit 16, a control unit 18 is arranged on one side of the evaluation unit 17, the protective box 15 can store and protect, workers can conveniently install the data acquisition unit 16, the evaluation unit 17 and the control unit 18, various mechanisms such as the data acquisition unit 16, the evaluation unit 17 and the control unit 18 are prevented from being damaged by external materials, and the service life of the mechanism is prolonged.
Referring to fig. 1, 2 and 5, the data acquisition unit 16 is connected with the first temperature sensor 3, the second temperature sensor 4, the air temperature sensor 5, the solar radiation instrument 6, the wind speed sensor 7 and the water temperature sensor 19 through wires respectively, so as to conveniently check the surface temperature information of the concrete bin 2, the internal temperature information of the concrete bin 2, the air temperature information above the concrete bin 2, the solar radiation power information above the concrete bin 2, the air flow speed information above the concrete bin 2, the wind speed grade information and the water temperature information.
Referring to fig. 1, 2 and 5, the control unit 18 is connected to the water supply device 13 and the data acquisition unit 16 through wires, and the control unit 18 is configured to generate a time-varying change coordinate graph of each corresponding information through corresponding cooperation between the water supply device 13 and the data acquisition unit 16.
The implementation scene is specifically as follows:
when the intelligent water diversion device is used again, the data acquisition unit 16 is connected with the first temperature sensor 3, the second temperature sensor 4, the air temperature sensor 5, the solar radiation instrument 6, the air speed sensor 7 and the water temperature sensor 19 through wires respectively, so that the surface temperature information of the concrete bin 2, the internal temperature information of the concrete bin 2, the air temperature information above the concrete bin 2, the solar radiation power information above the concrete bin 2, the air flow rate information above the concrete bin 2, the air speed grade information and the water temperature information are conveniently checked, the control unit 18 is used through corresponding cooperation of the water supply device 13 and the data acquisition unit 16, a corresponding change coordinate graph of each information changing along with time is generated, the water supply device 13 can play a driving role, external water flow is conveniently led into the storage tank 11, the water temperature sensor 19 can play a role in detecting the water temperature, the water temperature information is conveniently measured, the water flow can be conveniently stored through the storage tank 11, the water flow conveniently can be conveniently conducted through the flow guide pipe 12, the water inside the storage tank 11 can be conveniently conducted into the flow guide pipe 12, and the water inside the storage tank 11 is conveniently guided into the storage tank 8 through the flow guide pipe 12.
The curing method of the concrete dam bin surface curing method specifically comprises the following steps:
step one, a step one; firstly, a worker installs a first temperature sensor 3, a second temperature sensor 4, an air temperature sensor 5, a solar radiation instrument 6 and an air speed sensor 7 at a designated position according to actual demands, and installs each structure of a diversion box 8, a supporting pipe 9 and an atomizing spray head 10 on two sides of the surface of a concrete bin 2 according to actual demands;
step two, a step two is carried out; through the mutual cooperation of the first temperature sensor 3, the second temperature sensor 4, the air temperature sensor 5, the solar radiation instrument 6, the wind speed sensor 7 and the water temperature sensor 19, the surface temperature information of the concrete bin 2, the internal temperature information of the concrete bin 2, the air temperature information above the concrete bin 2, the solar radiation power information above the concrete bin 2, the air flow speed information above the concrete bin 2, the wind speed grade information and the water temperature information corresponding to the concrete bin 2 are collected;
step three, a step of performing; acquiring the spraying amount per minute required by the concrete bin 2 according to the acquired information and the preset target air temperature information corresponding to the concrete bin 2, guiding an external water source into the storage box 11 through the water supply equipment 13 according to the spraying amount per minute, guiding the water in the storage box 11 into the guide box 8 through the guide pipe 12 respectively, spraying through the atomizing nozzle 10, uniformly spraying the surface of the concrete bin 2, and acquiring the spraying amount per minute required by the concrete bin 2 through the control unit 18;
in the above formula, Q is the spraying amount per minute required by the concrete bin 2, T 1 For the temperature information above the concrete bin 2 before spraying, T 2 Is the target air temperature information of the 2 faces of the preset concrete bin, T 3 Is the internal temperature information of the concrete bin 2, t 2 Is the surface temperature information of the concrete bin 2, t Water and its preparation method C is the water temperature information Empty space For specific heat capacity of air, v Wind power Is the air flow velocity information and the wind speed grade information above the concrete bin 2, ρ Empty space The air density is w is the width of the surface 2 of the concrete bin, and l isThe length of the surface of the concrete bin 2, h is the distance from the spray nozzle to the surface of the concrete bin 2, wind is wind speed grade information above the concrete bin 2, L is preset average gasification latent heat of water particles, and P is solar radiation power information above the concrete bin 2 during spraying;
step four, a step four is carried out; the temperature field model of the concrete bin 2 is built according to the air temperature information acquired by the air temperature sensor 5 through the evaluation unit 17 so as to obtain the temperature value of each position point in the concrete bin 2 and according to the obtained temperature value of each position point in the concrete bin 2;
step five, a step of performing a step of; correcting target air temperature information according to the internal and external temperature difference stress of the concrete bin 2, re-acquiring the spraying amount per minute required by the concrete bin 2 according to the corrected target air temperature information, and uniformly spraying the surface of the concrete bin 2 according to the acquired spraying amount per minute;
in the above formula, the internal and external temperature difference stress of the concrete bin 2 is calculated, wherein σ is the internal and external temperature difference stress, K is a stress relaxation coefficient caused by preset creep, α is a preset linear expansion coefficient, μ is poisson ratio, E is the elastic modulus of the concrete, T (y) is a temperature value at a stress calculation point y in the temperature field model, a (epsilon) is a positive stress influence coefficient generated for the calculation point y when a pair of unit loads f=1 are added at the calculation point y=epsilon, T (epsilon) is a temperature value of the stress calculation point epsilon in the temperature field model, and Δy is an increment of the stress calculation point y in the temperature field model;
step six, a step of performing a step of; the temperature information and the target air temperature information measured by the sensors can be firstly established into corresponding temperature change process lines, whether the calculated internal and external temperature difference stress of the concrete bin 2 meets the standard requirement of the poured concrete bin 2 or not is judged, the standard requirement can be a national unified standard, when the internal and external temperature difference stress of the concrete bin 2 meets the standard requirement, the previous spraying amount per minute is continuously maintained, if the standard requirement is not met, the target air temperature information is corrected according to the change trend of the temperature process lines corresponding to the target air temperature information, the spraying amount per minute required by the concrete bin 2 is obtained again according to the corrected target air temperature information, and the concrete bin 2 is sprayed according to the spraying amount per minute, so that maintenance of the surface of the concrete bin 2 is repeatedly realized.
The application process of the practical embodiment of the invention is as follows:
firstly, a worker installs a first temperature sensor 3, a second temperature sensor 4, an air temperature sensor 5, a solar radiation instrument 6 and an air speed sensor 7 at a designated position according to actual demands, installs each structure of a diversion box 8, a supporting pipe 9 and an atomizing nozzle 10 on two sides of the surface of a concrete bin 2 according to actual demands, and acquires surface temperature information of the concrete bin 2, internal temperature information of the concrete bin 2, air temperature information above the concrete bin 2, solar radiation power information above the concrete bin 2, air flow rate information above the concrete bin 2 and air speed grade information and water temperature information corresponding to the concrete bin 2 through mutual cooperation of the first temperature sensor 3, the second temperature sensor 4, the air temperature sensor 5, the solar radiation instrument 6, the air speed sensor 7 and the water temperature sensor 19;
acquiring the spraying amount per minute required by the concrete bin 2 according to the acquired information and the preset target air temperature information corresponding to the concrete bin 2, guiding an external water source into the storage box 11 through the water supply equipment 13 according to the spraying amount per minute, guiding the water in the storage box 11 into the guide box 8 through the guide pipe 12 respectively, spraying the water through the atomizing nozzle 10, uniformly spraying the surface of the concrete bin 2, and acquiring the spraying amount per minute required by the concrete bin 2 through the control unit 18;
wherein Q is the spraying amount per minute required by the concrete bin 2, T 1 For the temperature information above the concrete bin 2 before spraying, T 2 Is the target air temperature information of the 2 faces of the preset concrete bin, T 3 Is the internal temperature information of the concrete bin 2, t 2 Is the surface temperature information of the concrete bin 2, t Water and its preparation method For water temperature signalRest, C Empty space For specific heat capacity of air, V Wind power Is the air flow velocity information and the wind speed grade information above the concrete bin 2, ρ Empty space The method comprises the steps that the air density is w is the width of the surface of a concrete bin 2, L is the length of the surface of the concrete bin 2, h is the distance between a spray nozzle and the surface of the concrete bin 2, wind is wind speed grade information above the concrete bin 2, L is preset average gasification latent heat of water particles, and P is solar radiation power information above the concrete bin 2 during spraying;
the temperature field model of the concrete bin 2 is built according to the air temperature information acquired by the air temperature sensor 5 through the evaluation unit 17, so that the temperature value of each position point in the concrete bin 2 is obtained, the target air temperature information is corrected according to the obtained temperature value of each position point in the concrete bin 2 and the internal and external temperature difference stress of the concrete bin 2, the spraying amount per minute required by the concrete bin 2 is obtained again according to the corrected target air temperature information, and the surface of the concrete bin 2 is uniformly sprayed according to the obtained spraying amount per minute;
wherein, the temperature difference stress inside and outside the concrete bin 2 is calculated;
wherein sigma is internal and external temperature difference stress, K is stress relaxation coefficient caused by preset creep, alpha is preset linear expansion coefficient, mu is Poisson ratio, E is elastic modulus of concrete, T (y) is a temperature value at a stress calculation point y in a temperature field model, A (epsilon) is a positive stress influence coefficient generated for the calculation point y when a pair of unit loads F=1 are added at the calculation point y=epsilon, T (epsilon) is a temperature value of the stress calculation point epsilon in the temperature field model, and delta y is an increment of the stress calculation point y in the temperature field model;
the temperature information and the target air temperature information measured by the sensors can be firstly established into corresponding temperature change process lines, whether the calculated internal and external temperature difference stress of the concrete bin 2 meets the standard requirement of the poured concrete bin 2 or not is judged, the standard requirement can be a national unified standard, when the internal and external temperature difference stress of the concrete bin 2 meets the standard requirement, the previous spraying amount per minute is continuously maintained, if the standard requirement is not met, the target air temperature information is corrected according to the change trend of the temperature process lines corresponding to the target air temperature information, the spraying amount per minute required by the concrete bin 2 is obtained again according to the corrected target air temperature information, and the concrete bin 2 is sprayed according to the spraying amount per minute, so that maintenance of the surface of the concrete bin 2 is repeatedly realized.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
The terms "upper", "lower", "left", "right", "middle", and the like, as used in the present specification, are also merely for descriptive purposes and are not intended to limit the scope of the invention in which the invention may be practiced or their relative relationships may be altered or modified without materially altering the technical context.
Claims (3)
1. The method for maintaining the bin surface of the concrete dam comprises a concrete dam main body (1) and is characterized in that: the concrete dam comprises a concrete dam body (1), wherein a concrete bin (2) is arranged at the top of the concrete dam body (1), a first temperature sensor (3) is arranged in the concrete bin (2), a second temperature sensor (4) is arranged on the surface of the concrete bin (2), an air temperature sensor (5) is arranged on one side of the surface of the top of the concrete bin (2), a solar radiation instrument (6) is arranged at the top of the concrete bin (2), and an air speed sensor (7) is arranged on one side of the solar radiation instrument (6);
the two sides of the surface of the concrete bin (2) are respectively provided with a diversion box (8), the upper surface of the diversion box (8) is provided with a plurality of support pipes (9), and one ends of the support pipes (9) are respectively provided with an atomization nozzle (10);
one end of the top of the concrete dam main body (1) is provided with a storage box (11), one ends of the two diversion boxes (8) are provided with diversion pipes (12), and one end of each diversion pipe (12) is communicated with the storage box (11);
one side of the storage box (11) is provided with a water supply device (13), the output end of the water supply device (13) is communicated with the storage box (11) through a hose, and one end, close to the storage box (11), of the flow guide box (8) is provided with a water temperature sensor (19);
a mounting groove (14) is formed in one side of the concrete dam main body (1), a protective box (15) is arranged in the mounting groove (14), and the protective box (15) is mounted in the mounting groove (14) through bolts;
a data acquisition unit (16) is arranged in the protective box (15), an evaluation unit (17) is arranged on one side of the data acquisition unit (16), and a control unit (18) is arranged on one side of the evaluation unit (17);
the method specifically comprises the following steps:
step one, a step one; firstly, a worker installs a first temperature sensor (3), a second temperature sensor (4), an air temperature sensor (5), a solar radiation instrument (6) and an air speed sensor (7) at a designated position according to actual demands, and installs each structure of a diversion box (8), a supporting tube (9) and an atomizing nozzle (10) on two sides of the surface of a concrete bin (2) according to the actual demands;
step two, a step two is carried out; through the mutual cooperation of the first temperature sensor (3), the second temperature sensor (4), the air temperature sensor (5), the solar radiation instrument (6), the wind speed sensor (7) and the water temperature sensor (19), the surface temperature information of the concrete bin (2) corresponding to the concrete bin (2), the internal temperature information of the concrete bin (2), the air temperature information above the concrete bin (2), the solar radiation power information above the concrete bin (2), the air flow speed information and the wind speed grade information above the concrete bin (2) and the water temperature information are collected;
step three, a step of performing; acquiring the spraying amount per minute required by the concrete bin (2) according to the acquired information and the preset target air temperature information corresponding to the concrete bin (2), guiding an external water source into a storage box (11) through a water supply device (13) according to the spraying amount per minute, guiding the water in the storage box (11) into a guide box (8) through a guide pipe (12) respectively, spraying the water through an atomization nozzle (10), uniformly spraying the surface of the concrete bin (2), and acquiring the spraying amount per minute required by the concrete bin (2) through a control unit (18);
in the formula, Q is the spraying amount per minute required by the concrete bin (2), T 1 For the temperature information above the concrete bin (2) before spraying, T 2 Is the target air temperature information of the preset concrete bin (2), T 3 Is the internal temperature information of the concrete bin (2), t 2 Is the information of the surface temperature of the concrete bin (2), t Water and its preparation method C is the water temperature information Empty space For specific heat capacity of air, v Wind power Is the air flow velocity information and the wind speed grade information above the concrete bin (2), ρ Empty space The method comprises the steps that the air density is w is the width of a concrete bin (2), L is the length of the concrete bin (2), h is the distance between a spray nozzle and the concrete bin (2), wind is wind speed grade information above the concrete bin (2), L is preset average gasification latent heat of water particles, and P is solar radiation power information above the concrete bin (2) during spraying;
step four, a step four is carried out; according to the temperature information acquired by the evaluation unit (17) through the temperature sensor (5), a temperature field model of the concrete bin (2) is built so as to obtain temperature values of all position points in the concrete bin (2) and according to the obtained temperature values of all position points in the concrete bin (2);
in the formula, the internal and external temperature difference stress of the concrete bin (2) is calculated, wherein sigma is the internal and external temperature difference stress, K is a stress relaxation coefficient caused by preset creep, alpha is a preset linear expansion coefficient, mu is poisson ratio, E is the elastic modulus of the concrete, T (y) is a temperature value at a stress calculation point y in a temperature field model, A (epsilon) is a positive stress influence coefficient generated on the calculation point y when a pair of unit loads F=1 are added at the calculation point y=epsilon, T (epsilon) is a temperature value of the stress calculation point epsilon in the temperature field model, and delta y is an increment of the stress calculation point y in the temperature field model;
step five, a step of performing a step of; correcting target air temperature information according to the internal and external temperature difference stress of the concrete bin (2), re-acquiring the spraying amount per minute required by the concrete bin (2) according to the corrected target air temperature information, and uniformly spraying the surface of the concrete bin (2) according to the acquired spraying amount per minute;
step six, a step of performing a step of; firstly, establishing a corresponding temperature change process line according to temperature information and target air temperature information measured by the sensors, judging whether the calculated internal and external temperature difference stress of the concrete bin (2) meets the standard requirement of the poured concrete bin (2), continuously maintaining the previous spraying amount per minute when the internal and external temperature difference stress of the concrete bin (2) meets the standard requirement, correcting the target air temperature information according to the change trend of the temperature process line corresponding to the target air temperature information if the internal and external temperature difference stress of the concrete bin does not meet the standard requirement, re-acquiring the spraying amount per minute required by the concrete bin (2) according to the corrected target air temperature information, spraying the concrete bin (2) according to the spraying amount per minute, and repeating the steps to realize maintenance of the surface of the concrete bin (2).
2. The concrete dam face maintenance method of claim 1, wherein the method comprises the steps of: the data acquisition unit (16) is respectively connected with the first temperature sensor (3), the second temperature sensor (4), the air temperature sensor (5), the solar radiation instrument (6), the wind speed sensor (7) and the water temperature sensor (19) through wires.
3. The concrete dam face maintenance method of claim 2, wherein: the control unit (18) is respectively connected with the water supply equipment (13) and the data acquisition unit (16) through wires.
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