CN113191038B - Lining concrete temperature reduction rate optimization control method and system - Google Patents
Lining concrete temperature reduction rate optimization control method and system Download PDFInfo
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Abstract
The invention provides a method and a system for optimizing and controlling the temperature drop rate of lining concrete, which can quickly and accurately calculate and obtain the optimized and controlled temperature drop rate, carry out water cooling on the lining concrete based on the optimized and controlled temperature drop rate, and scientifically and reasonably realize temperature control and crack prevention. The invention provides a lining concrete temperature reduction rate optimization control method, which is characterized by comprising the following steps: step 1, obtaining water cooling temperature control data of lining concrete; step 2, calculating the water cooling optimal control temperature reduction rate V of the lining concretey＝0.86H+0.14C‑0.03HC‑0.13H2-1.95, wherein: h is the thickness of the lining concrete; c, designing age strength grade for lining concrete 90 d; step 3, optimally controlling the temperature reduction rate V according to water coolingyAnd optimizing water cooling measures of the lining concrete.
Description
Technical Field
The invention belongs to the technical field of concrete temperature control and crack prevention, and particularly relates to a lining concrete temperature reduction rate optimization control method and system.
Background
The buried cooling water pipe is filled with water for cooling to reduce the highest temperature of concrete and control the internal and external temperature difference, and the lining concrete of the power generation diversion tunnel of the underground power station at the right bank of the three gorges hydro-junction is applied to the large-scale hydraulic tunnel lining concrete of giant hydro-power stations such as Xiluodie, white Crane beach, Wudongde and the like for the first time and is successful. However, the regulation provisions of hydraulic tunnels and the like do not provide for the control of the cooling rate of the water-cooling of the lining concrete. The cooling speed is controlled to be not more than 1 ℃/d by referring to the design specifications of a concrete gravity dam or a concrete arch dam and the like.
On one hand, the water cooling (namely the temperature difference with the internal concrete) of mass concrete such as a multilayer pouring dam is controlled by no temperature crack generated around the lower-layer old concrete pipe, and the allowable water temperature difference and the temperature drop speed are lower; on the other hand, the lining structure has small thickness and fast temperature drop rate, and the rapid drop rate after the internal temperature reaches the maximum value is often more than 1 ℃/d no matter whether water cooling measures are taken or not.
The lining structure concrete has small thickness, is poured once, is cooled by water when covering the cooling water pipe with the concrete, is equivalent to the condition of newly pouring the concrete on the upper part, has no obvious temperature reduction process around the pipe and has small tensile stress. Therefore, whether water cooling of thin-walled lining structure concrete can allow faster temperature drop rate on the one hand, and how much temperature drop rate is more favorable for temperature control crack prevention on the other hand? In addition, the thickness of the lining structure is different, the strength of concrete is different, the water cooling optimal control temperature drop rate can have larger difference, but at present, a method for accurately calculating the water cooling optimal control temperature drop rate according to the concrete condition of the lining structure does not exist.
Disclosure of Invention
The invention is made to solve the above problems, and aims to provide a lining concrete temperature drop rate optimization control method and system, which can calculate and obtain the optimized control temperature drop rate quickly and accurately, and carry out water cooling on the lining concrete based on the optimized control temperature drop rate, thereby scientifically and reasonably realizing temperature control and crack prevention.
In order to achieve the purpose, the invention adopts the following scheme:
< method >
As shown in FIG. 2, the present invention provides a method for optimizing and controlling the temperature drop rate of lining concrete, which is characterized by comprising the following steps:
Vy＝0.86H+0.14C-0.03HC-0.13H2-1.95 (equation 1)
In the formula: h is the thickness (m) of the lining concrete; c, designing age strength grade (MPa) for lining concrete 90 d;
step 3, optimally controlling the temperature reduction rate V according to water coolingyAnd optimizing water cooling measures of the lining concrete.
Preferably, the method for optimizing and controlling the temperature drop rate of the lining concrete provided by the invention can also have the following characteristics: in step 3, the optimized water cooling measure is to control the water cooling temperature reduction rate not to exceed Vy. It must be pointed out that the optimal temperature drop rate V is controlled optimallyyThe average value of the optimal control time (slightly longer than the maximum internal temperature difference generation time) from the occurrence of the internal maximum temperature to the water cooling. I.e. about an average over a 2d period. When the temperature reduction rate of actual engineering lining concrete is controlled, the early stage (curing period K) is controlled due to the increase of water temperature1Increased) cracking prevention is favorable, the allowable maximum temperature is generally determined according to the requirement that the temperature crack K2 does not occur in winter, so that the temperature drop rate can be allowed to be less than V on the premise that the maximum temperature meets the requirementy(but not greater than V)yCorresponding to the upper limit of the allowable temperature drop rate), namely the water temperature is higher appropriately, so that the cost of refrigerating water can be further saved.
Preferably, the method for optimizing and controlling the temperature drop rate of the lining concrete provided by the invention can also have the following characteristics: in step 3, the optimized water cooling measure is to control the water cooling temperature reduction rate to be (V)y-0.7℃/d)～VyWithin the range.
Preferably, the method for optimizing and controlling the temperature drop rate of the lining concrete provided by the invention can also have the following characteristics: executing the step 2 by adopting a control processing device, and determining the water cooling optimal control temperature reduction rate Vy。
Preferably, the method for optimizing and controlling the temperature drop rate of the lining concrete provided by the invention can also have the following characteristics: and (3) executing the step (1) by adopting a control processing device, and enabling an operator to input temperature control data according to the prompt and store the temperature control data.
Preferably, the method for optimizing and controlling the temperature drop rate of the lining concrete provided by the invention can also have the following characteristics: the step 3 is also executed by adopting a control processing device, and the temperature reduction rate V is optimally controlled according to the water coolingyAnd determining a water cooling measure, and controlling a water cooling device to carry out water cooling maintenance on the lining concrete.
< System >
Further, the present invention provides a lining concrete temperature drop rate optimization control system, comprising: an input display part for the operator to input the collected water cooling and temperature controlling data for lining concrete; a storage part for storing the input lining concrete temperature control data; a calculating part for calculating the water cooling optimal control temperature reduction rate V of the lining concrete based on the data for temperature control of the lining concrete by adopting the following formulay0.86H +0.14C-0.03HC-0.13H2-1.95, wherein: h is the thickness of the lining concrete; c, designing age strength grade for lining concrete 90 d; a water cooling part for optimally controlling the temperature reduction rate V according to the water coolingyPerforming water cooling measures; and a control part which is connected with the input display part, the storage part, the calculation part and the water cooling part in a communication way and controls the operation of the input display part, the storage part, the calculation part and the water cooling part.
Preferably, the lining concrete temperature drop rate optimizing control system provided by the invention can also have the following characteristics: the input display part also controls the optimal control temperature reduction rate V of the water cooling calculated by the calculation part according to the operation instructionyAnd displaying.
Preferably, the lining concrete temperature drop rate optimizing control system provided by the invention can also have the following characteristics: the input display unit also displays the measures of water cooling performed by the water cooling unit based on the operation command.
Preferably, the lining concrete temperature drop rate optimizing control system provided by the invention can also have the following characteristics: the water cooling part controls the water cooling temperature reduction rate of the lining concrete not to exceed Vy。
In addition, the step 2 calculates the optimal temperature reduction rate V of the concrete water cooling optimal control of the lining structureyThe formula 1 is to take giant hydropower station flood discharging tunnel engineering such as Xiluodie, white Crane beach, Wudongde and the like as an example, a three-dimensional finite element method is adopted to carry out temperature and temperature stress simulation calculation of lining concrete with different thicknesses and different strength grades on an urban door opening type section under different water cooling water temperature conditions, the temperature control anti-cracking effect of the lining concrete in the whole process is analyzed in a finishing mode, the water cooling control temperature drop rate of the lining concrete with different thicknesses and different strength grades is obtained on the basis of obtaining the maximization of the whole-process anti-cracking safety coefficient. For example, a 1.0m thickness sidewall C adopting a structure (FIG. 1)9030 strength concrete with different water temperatures T of 8-22 ℃ in the table 1wPerforming condition simulation calculation, solving the crack resistance safety coefficient K of the whole lining concrete process, and arranging the two maintenance periods with the minimum K value and the K value in winter1、K2Then make K1、K2With the temperature T of the waterwSee fig. 3. The temperature reduction rate T can also be adjustedsd(° c/d) and water temperature TwSee fig. 4. Due to K1With TwIncrease, K2With TwThe point of intersection of the two curves is the water temperature T which can obtain the maximum safety coefficient of crack resistance in the whole processwy. Corresponding to the value, hereinafter referred to as water cooling comprehensive optimization crack resistance safety factor Ky. Together with Ky、TwyThe corresponding temperature drop rate is called as the optimized control temperature drop rate Vy。
From K in FIG. 31(Tw) And K2(Tw) Intersection determination TwyThe value, then, can be determined from FIG. 4wyValue corresponding optimized control temperature drop rate Vy. V for summarizing lining concrete with different thicknesses H and different strength gradesyThe values are shown in Table 2. Then statistical analysis is carried out on the data to obtain the water cooling optimal control temperature drop rate VyEquation 1 is calculated.
TABLE 11.0 m Lining C9030 concrete water cooling characteristic values at different water temperatures
TABLE 2 Water cooling optimized control of temperature drop rate V for lining concrete of different thickness and different strength gradey
Action and Effect of the invention
The lining concrete temperature reduction rate optimization control method and the system provided by the invention have the advantages that:
(1) the method can be suitable for any lining concrete structure, the water cooling water temperature optimization control calculation is carried out, and the water cooling optimization control temperature drop rate can be quickly obtained.
(2) The method is scientific. The water cooling optimal control temperature drop rate calculation formula comprehensively reflects the influence of the thickness and strength grade of the lining concrete structure on the control of the water cooling temperature drop rate, and is the temperature drop rate corresponding to the maximum value of the anti-cracking safety coefficient in the whole process. Optimizing the rate of temperature drop VyThe allowable temperature drop rate of the large-volume concrete such as a gravity dam, an arch dam and the like is higher than the optimized temperature drop rate VyThe water can be introduced for cooling at a more appropriate water temperature, so that a better temperature control anti-cracking effect is obtained, and the optimal temperature control anti-cracking effect is scientifically obtained.
(3) Furthermore, the optimal control system for the temperature reduction rate of the lining concrete can automatically calculate the optimal control temperature reduction rate V of the lining concrete through water cooling according to the data for the water cooling and temperature control of the lining concreteyAnd corresponding water cooling measures are executed, the whole process has no human factor interference, the automation degree is high, the water feeding maintenance of the lining concrete can be quickly and effectively carried out at a proper temperature reduction rate, and the temperature control of the lining concrete is ensuredAnd (3) an anti-cracking effect.
Drawings
FIG. 1 is a sectional view of a tunnel type lining structure of a hydraulic tunnel (dimension unit: m in the figure);
FIG. 2 is a flow chart of the method for controlling the temperature drop rate of lining concrete in an optimized manner according to the present invention;
FIG. 3 shows a graph C according to the present invention9030 concrete curing period K with different thickness1And winter K2Water is introduced for cooling water temperature TwA relationship diagram of (1);
FIG. 4 shows a graph C according to the present invention9030 concrete temperature drop rate Tsd(DEG C/d) and the temperature T of cooling water passing throughwA relationship diagram of (1);
FIG. 5 is a sectional view (unit: cm) of an A-shaped lining structure of a non-pressure section of a spillway tunnel of an Wudongde hydropower station related by the invention;
FIG. 6 shows a graph 3 according to the present invention#The measured internal temperature duration curve chart of the arch lining concrete at the top of the 1 st bin of the non-pressure section of the tunnel;
FIG. 7 is a sectional view (unit: cm) of a non-pressure section lining C-shaped structure of a spillway tunnel of an Wudongde hydropower station related to the invention;
FIG. 8 shows a graph 3 according to the present invention#And (4) a measured internal temperature duration curve chart of the concrete lined at the top arch of the 22 nd cabin of the non-pressure section of the tunnel.
Detailed Description
The concrete implementation of the lining concrete temperature reduction rate optimization control method and system related to the invention is explained in detail below by taking the lining concrete of the flood discharging tunnel of the Wudongde hydropower station as an example in combination with the attached drawings.
< Wudongde hydropower station flood discharge tunnel engineering lining concrete temperature control data >
The Wudongde hydropower station mainly generates electricity and has the functions of flood control, shipping, sand blocking and the like. Installed capacity 10200MW of power station. The dam is a concrete hyperbolic arch dam, and flood discharge adopts a mode that the dam body mainly discharges flood and the shore flood discharge hole is assisted. The three flood discharging holes are all of tunnel type tunnels with pressure holes and then door-connected holes, and each tunnel type tunnel comprises a water inlet, a pressure hole section, a working gate chamber, a non-pressure hole section, an outlet section and an energy dissipation plunge pool, and the outlets adopt trajectory jet energy dissipation. The pressure holes of the flood discharge hole are circularCross section (figure 5), internal diameter 14m, lining thickness 0.8m, lining thickness 1m, class II and class III surrounding rocks around the tunnel, and lining concrete C9030. The section of the non-pressure hole section is in an urban portal shape, and the size of the non-pressure hole section after lining is 14m multiplied by 18 m. A gentle slope section of the flood discharging tunnel is provided with three lining thickness structural sections of 0.8m, 1.0m and 1.5m, and the types of rocks around the tunnel are II, III and IV surrounding rocks respectively. The bottom plate and the side wall are C9035 impact-resistant and wear-resistant concrete with crown arch of C9030 concrete. The steep slope section is also designed with two lining thickness sections of 0.8m and 1.0m, and the bottom plate and the side wall are C9040 impact-resistant and wear-resistant concrete with crown arch of C9030 concrete. The section of the lining structure with three thicknesses of the non-pressure section (the gentle slope section and the steep slope section) of the flood discharge tunnel is shown in figure 5.
Carry out temperature control to the concrete at the overall process of concrete placement and maintenance, avoid the concrete fracture, the design requirement temperature control measure includes:
(1) the quality control and the mix proportion optimization of the concrete raw materials are as follows:
the water content of the concrete fine aggregate is controlled to be below 6%, and the fluctuation range of the water content is less than 2%. The mixing proportion of the concrete is optimized, and the using amount of concrete cementing materials is reduced; the construction management is enhanced, the construction process is improved, the concrete performance is improved, and the concrete anti-cracking performance is improved. On the premise of meeting the concrete strength, durability, workability and concrete pouring quality required by design, the concrete aggregate gradation is improved by adopting larger aggregate particle size as much as possible after the approval of a manager.
(2) Reasonably arranging concrete construction procedures and construction progress:
the reasonable arrangement of concrete construction procedures and construction progress is one of the main measures for preventing foundation from penetrating cracks and reducing surface cracks. The concrete construction procedure and the construction progress should be reasonably arranged, and the construction management level should be improved in an effort.
(3) Controlling the highest internal temperature of concrete:
necessary temperature control measures should be taken so that the maximum temperature does not exceed the design allowable maximum temperature (table 3). The effective measures comprise concrete pouring temperature reduction, cementing material hydration heat temperature rise reduction, initial water cooling and the like. The concrete production system provides mixed concrete meeting the outlet temperature requirement. The contractor is responsible for controlling the temperature of concrete during the concrete transportation, warehousing and casting and curing after leaving the machine outlet. According to the analysis of computational results, the concrete pouring temperature of the gentle slope section of the flood discharging tunnel of the Wudongde hydropower station is suggested to be controlled according to the table 3. And if the measured temperature can not meet the maximum temperature allowed by the design, the buried cooling water pipe needs to be filled with water for cooling.
(4) Reasonably controlling the thickness of the pouring layer and the interval period between layers:
when concrete at each part is poured, if the poured concrete temperature can not meet the relevant requirements, a supervisor is immediately informed, the concrete is processed according to the instruction of the supervisor, and effective measures are immediately taken to control the concrete pouring temperature.
Table 3 units of maximum temperature and casting temperature allowed during construction of flood tunnel lining concrete: c
| Month of the year | 12. 1 |
2. 11 month | 3. 10 month | 4. 9 |
5 to 8 months |
| Allowable maximum temperature | 40 | 41 | 42 | 43 | 44 |
| Allowable casting temperature | Naturally put into storage | Naturally put into |
18 | 20 | 22 |
<Example one>3#Calculation of optimal temperature reduction rate of lining concrete water cooling control of No. 1 cabin roof arch at non-pressure section of tunnel
3#The 1 st cabin of the tunnel non-pressure section, the city portal tunnel-shaped lining, the side wall lining thickness of 0.8m, the circumferential construction parting is arranged every 9m along the axial direction of the flood discharge tunnel, II types of surrounding rocks, and the bottom plate and the side wall of the lining structure are C9040 concrete, crown arch C9030W8F150 concrete, as shown in fig. 5. Pouring concrete by stages 2: the top arch is arranged at the front side, and the bottom plate is arranged at the back side. Will pour in 5 months. The calculation of the optimal temperature drop rate of the concrete pouring water cooling control of the side crown arch lining is introduced. The basic data of temperature control are the same as above. And (5) moisturizing and maintaining for 28d by adopting normal-temperature tap water, and introducing water for cooling to control the internal temperature of the concrete.
As shown in fig. 2, the method for calculating the optimal temperature drop rate of the water cooling control of the thin-walled lining concrete provided by the embodiment includes the following steps:
The basic data of the Wudongde hydropower station flood discharge tunnel are as described above, the flood discharge tunnel is a level 1 building, the flood discharge flow rate is high, and the temperature control and crack prevention of the lining concrete are very important. According to the design requirements, the casting temperature is controlled to be less than or equal to 22 ℃ in the casting process of 5-8 months in a high-temperature season, and temperature control measures such as water cooling are adopted. The highest temperature is controlled to be less than or equal to 44 ℃.
Step 2Calculating the optimal temperature reduction rate V of the water cooling optimization control of the lining concretey：
V was calculated by substituting H of 0.8m and C of 30MPa into equation 1y＝2.13℃/d。
And 3, optimizing a water cooling temperature control scheme of the lining concrete, and mainly analyzing a temperature reduction rate control value.
According to the actual technical requirements and the calculation and analysis, the optimal water cooling temperature control scheme is determined as follows: the pouring temperature is less than or equal to 22 ℃, the single-row spacing of the water cooling water pipes is 1.5m, the water flowing time is 7d, the river water is normal temperature, and the temperature drop rate is optimally controlled according to 2.1 ℃/d.
And 4, checking and analyzing the temperature drop rate and the temperature control anti-cracking effect, including the control effects of temperature, temperature drop rate, temperature crack and the like.
3#1 st storehouse top arch lining concrete of hole non-pressure section, stake number: k1+ 238.880-K1 +247.880m, EL 908.20-EL928.16m in unit height, pouring when 2016 is 5 months, 3 days to 5 months, 5 days and 16 days, and burying 1 thermometer at 928.2m height. The cooling time is 7d, and the temperature is 13.8 ℃ after water is introduced. The casting temperature was found to be 18.13 ℃ and the maximum temperature was 38.61 ℃ over 2.67 days, the average 2d temperature drop rate was 1.8 ℃/d during the early stage, and the temperature duration curve is shown in FIG. 6. And (4) checking in situ without any temperature crack.
The results show that the concrete Tmax38.61 ℃ which is far less than the maximum design allowable temperature of 44 ℃; the temperature drop speed value is 1.8 ℃/d and is slightly less than the optimal control temperature drop speed value of 2.13 ℃/d. The field inspection shows that no temperature crack exists, and the temperature control anti-cracking effect has good effect. As explained above, the cooling water at 13.8 ℃ is adopted for cooling, the internal maximum temperature is far smaller than the allowable value, no crack is detected, the concrete temperature reduction rate is slightly smaller than the optimized control temperature reduction rate under the condition, the cooling cost is saved, the purposes of controlling the internal maximum temperature of the concrete by cooling water and controlling the temperature control and crack prevention are achieved, and the temperature control benefit and the economic benefit are maximized.
<Example two>3#Calculation of optimal temperature drop rate of 22 nd cabin side wall lining concrete water cooling control in non-pressure section of tunnel
3#No-pressure section 22 st cabin, city portal lining and side wall liningThe thickness of the lining is 1.5m, annular construction joints are arranged every 9m along the axial direction of the flood discharge tunnel, IV-class surrounding rocks, and the bottom plate and the side wall of the lining structure are C9040 concrete, crown arch C9030W8F150, as shown in fig. 7. Pouring concrete by stages 2: the top arch is arranged at the front side, and the bottom plate is arranged at the back side. Will pour in 9 months. The calculation of the optimal temperature drop rate of the concrete pouring water cooling control of the side crown arch lining is introduced. The basic data of temperature control are the same as above. And (5) moisturizing and maintaining for 28d by adopting normal-temperature tap water, and introducing water for cooling to control the internal temperature of the concrete.
As shown in fig. 2, the method for calculating the optimal temperature drop rate of the water cooling control of the thin-walled lining concrete provided by the embodiment includes the following steps:
The basic data of the Wudongde hydropower station flood discharge tunnel are as described above, the flood discharge tunnel is a level 1 building, the flood discharge flow rate is high, and the temperature control and crack prevention of the lining concrete are very important. According to the design requirements, the pouring temperature is controlled to be less than or equal to 20 ℃ when pouring is carried out for 9 months in a high-temperature season, and temperature control measures such as water cooling and the like are adopted. The highest temperature is controlled to be less than or equal to 43 ℃.
The sidewall H is 1.5m, and C is 40MPa is substituted into equation 1 to calculate Vy＝2.84℃/d。
And 3, optimizing a water cooling temperature control scheme of the lining concrete, and mainly analyzing a temperature reduction rate control value.
According to the actual technical requirements and the calculation and analysis, the optimal water cooling temperature control scheme is determined as follows: the pouring temperature is less than or equal to 20 ℃, the single-row spacing of the water-feeding cooling water pipes is 1.5m, the water-feeding time is 7d, the river water is normal temperature, and the temperature drop rate is optimally controlled according to 2.8 ℃/d.
And 4, checking and analyzing the temperature drop rate and the temperature control anti-cracking effect, including the control effects of temperature, temperature drop rate, temperature crack and the like.
3#Non-pressure section of hole22 nd storehouse side wall lining concrete, pile number: k1+ 418-K1 +427m, cell heights EL 904.32-EL924.12m, pouring at 2016, 9, month, 17, day-9, month, 19, and burying 1 thermometer at 923.5 m. And (4) introducing water for cooling for 7d, and introducing water for cooling at the temperature of 22 ℃. The casting temperature was found to be 20.07 deg.C, the maximum temperature was 39.5 deg.C over 3.17 days, the average 2d temperature drop rate was 2.1 deg.C/d during the early stage, and the temperature duration curve is shown in FIG. 8. And (4) checking in situ without any temperature crack.
The results show that the concrete Tmax39.5 ℃ which is far less than the design allowable maximum temperature of 43 ℃; the temperature drop speed is 2.1 ℃/d and is less than the optimized control temperature drop speed of 2.8 ℃/d. The field inspection shows that no temperature crack exists, and the temperature control anti-cracking effect has good effect. As explained above, the normal temperature water at 22 ℃ is adopted for water cooling, the internal maximum temperature is far smaller than the allowable value, no crack is detected, the concrete temperature reduction rate is slightly smaller than the optimized control temperature reduction rate under the condition, the refrigeration cost is saved, the purposes of controlling the internal maximum temperature of the concrete by water cooling and controlling the temperature control and anti-cracking are achieved, and the temperature control benefit and the economic benefit are maximized.
The results of the above embodiments show that the method of the present invention can be applied to any lining structure (including different civil engineering types, different structural forms, different thicknesses, different strengths, different temperature control measure schemes, etc.), and the calculation of the optimal temperature drop rate of the water cooling control of the lining concrete is performed, i.e. the temperature drop rate of the actual construction temperature control measure scheme is optimized. The method is scientific.
< third embodiment > temperature drop rate optimization control system for lining concrete
The embodiment provides a system capable of automatically implementing the optimal control method for the temperature drop rate of lining concrete, and the system comprises: the device comprises an input display part, a storage part, a calculation part, a water cooling part and a control part.
The input display part is used for leading the operator to input the collected water cooling and temperature control data of the lining concrete according to the prompt and can carry out corresponding display according to the operation instruction input by the operator. For example, the input display unit may control the flow cooling optimal control temperature drop rate V calculated by the calculation unit according to the operation commandyCan display and can also displayAnd displaying the water cooling measure executed by the water cooling unit according to the operation command.
The storage part is communicated with the input display part and stores the input lining concrete temperature control data, and the lining concrete temperature control data comprises the thickness H of the lining concrete and the strength grade C of the lining concrete.
The calculation part is in communication connection with the storage part and the input display part, and based on the data for temperature control of the lining concrete, the following formula is adopted to calculate the optimal control temperature reduction rate V of the water cooling of the lining concretey：
Vy＝0.86H+0.14C-0.03HC-0.13H2-1.95
In the formula: h is the thickness of the lining concrete; c is the strength grade of the lining concrete 90d in the design age.
The water cooling part is communicated with the calculating part and the storage part, and the temperature reduction rate V is optimally controlled according to the water cooling temperature control data and the water cooling of the lining concreteyExecuting water cooling measures to control the water cooling temperature reduction rate of the lining concrete not to exceed Vy。
The control part is connected with the input display part, the storage part, the calculation part and the water cooling part in a communication way and controls the operation of the input display part, the storage part, the calculation part and the water cooling part.
The above embodiments are merely illustrative of the technical solutions of the present invention. The method and system for controlling the temperature drop rate of lining concrete in an optimized manner are not limited to the contents described in the above embodiments, but are subject to the scope defined by the claims. Any modification or supplement or equivalent replacement made by a person skilled in the art on the basis of this embodiment is within the scope of the invention as claimed in the claims.
Claims (10)
1. The method for optimizing and controlling the temperature reduction rate of the lining concrete is characterized by comprising the following steps of:
step 1, obtaining water cooling temperature control data of lining concrete;
step 2, calculating the water cooling optimal control temperature reduction rate V of the lining concretey：
Vy＝0.86H+0.14C-0.03HC-0.13H2-1.95
In the formula: h is the thickness of the lining concrete; c, designing age strength grade for lining concrete 90 d;
step 3, optimally controlling the temperature reduction rate V according to water coolingyAnd optimizing water cooling measures of the lining concrete.
2. The lining concrete temperature reduction rate optimization control method according to claim 1, characterized in that:
in step 3, the optimized water cooling measure is to control the water cooling temperature reduction rate not to exceed Vy。
3. The lining concrete temperature reduction rate optimization control method according to claim 1, characterized in that:
wherein, in step 3, the optimized water cooling measure is to control the water cooling temperature reduction rate to be (V)y-0.7℃/d)～VyWithin the range.
4. The lining concrete temperature reduction rate optimization control method according to claim 1, characterized in that:
wherein, the step 2 is executed by adopting a control processing device, and the optimal control temperature reduction rate V of water cooling is determinedy。
5. The lining concrete temperature reduction rate optimization control method according to claim 1, characterized in that:
wherein, a control processing device is also adopted to execute the step 1, so that an operator can input temperature control data according to the prompt and store the temperature control data.
6. The lining concrete temperature reduction rate optimization control method according to claim 1, characterized in that:
wherein, the step 3 is also executed by adopting a control processing device, and the temperature reduction rate V is optimally controlled according to the water coolingyAnd determining a water cooling measure, and controlling a water cooling device to carry out water cooling maintenance on the lining concrete.
7. The temperature drop rate optimizing control system of lining concrete is characterized by comprising:
an input display part for the operator to input the collected water cooling and temperature controlling data for lining concrete;
a storage part for storing the input lining concrete temperature control data;
a calculating part for calculating the water cooling optimal control temperature reduction rate V of the lining concrete based on the data for temperature control of the lining concrete by adopting the following formulay：
Vy＝0.86H+0.14C-0.03HC-0.13H2-1.95
In the formula: h is the thickness of the lining concrete; c, designing age strength grade for lining concrete 90 d;
a water cooling part for optimally controlling the temperature reduction rate V according to the water coolingyPerforming water cooling measures; and
and the control part is in communication connection with the input display part, the storage part, the calculation part and the water cooling part and controls the operation of the input display part, the storage part, the calculation part and the water cooling part.
8. The lining concrete temperature reduction rate optimizing control system of claim 7, wherein:
wherein the input display part is used for controlling the temperature reduction rate V of the water cooling optimization calculated by the calculation part according to the operation instructionyAnd displaying.
9. The lining concrete temperature reduction rate optimizing control system of claim 7, wherein:
the input display part also displays the water cooling measures executed by the water cooling part according to the operation command.
10. The lining concrete temperature reduction rate optimizing control system of claim 7, wherein:
wherein the water cooling part controls the water cooling temperature reduction rate of the lining concrete not to exceed Vy。
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