Water cooling temperature control method for optimal water temperature difference of lining concrete with different thicknesses

A technology of water cooling and water temperature difference, applied in design optimization/simulation, special data processing application, geometric CAD, etc., can solve the problem of lack of scientific regulation of lining concrete cooling time, water temperature and temperature drop rate, etc., to achieve temperature control Anti-cracking, scientific effect

CN113158299AActive Publication Date: 2021-07-23清远市水利水电工程监理有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-07-23

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Abstract

According to the optimal water temperature difference water cooling temperature control method for the lining concrete with different thicknesses, parameters such as the water temperature difference, the water temperature, the cooling time and the temperature drop rate suitable for the lining concrete with different thicknesses can be objectively and accurately obtained, water cooling is conducted on the lining structure based on the parameters, and temperature control and cracking prevention are scientifically and reasonably achieved. The water cooling temperature control method comprises the following steps: step 1, acquiring lining concrete water cooling temperature control data; 2, according to the thickness of lining concrete, calculating a water cooling optimization control water temperature difference Twy; 3, estimating the highest temperature Tmax in the lining concrete according to the thickness; 4, calculating a water cooling optimization control water temperature Twy; 5, calculating water cooling optimization time Tj according to the thickness of the lining concrete; 6, calculating the optimal control temperature drop rate Vc according to the lining concrete thickness; and 7, optimizing water cooling measures of lining concrete with different thicknesses according to the water cooling optimization control water temperature Twy, the optimization time Tj and the optimization control temperature drop rate Vc.
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Description

technical field

[0001] The invention belongs to the technical field of concrete temperature control and anti-cracking, and in particular relates to a temperature control method for cooling through water with optimal water temperature difference for lining concrete with different thicknesses. Background technique

[0002] Large-volume concrete such as gravity dams are buried with cooling water pipes for cooling. In the initial stage, cold water or low-temperature river water is passed to reduce the maximum temperature of concrete; For the initial water cooling, the time should be calculated and determined, preferably 10 to 20 days, and the difference between the concrete temperature and the water temperature should not exceed 25°C. Medium-term water cooling should be about 1-2 months, and the difference between the water temperature and the internal temperature of the concrete should not exceed 20-25 °C. The daily temperature drop does not exceed 1.0°C. Due to the expansion...

Examples

Embodiment 1

[0102] 3 # Optimal control of cooling through water for the 0.8m-thick A-type lining concrete of the first warehouse of the non-pressure gentle slope section of the spillway tunnel

[0103] For the 0.8m thick A-type lining structure of the gentle slope section of the spillway tunnel Figure 10 , the city gate tunnel-shaped section, along the axis of the flood discharge tunnel, set up circular construction joints every 9m, Class II surrounding rock, concrete strength C 90 35. The concrete is poured in two phases: first the side wall arch, then the floor. Here we introduce the optimal control of water cooling for side arch lining concrete pouring.

[0104] Such as figure 2 As shown, the optimal water temperature difference water cooling temperature control method for lining concrete with different thicknesses provided in this embodiment includes the following contents:

[0105] Step 1. Analyze the data related to water cooling and temperature control of lining concrete, i...

Embodiment 2

[0125] 3 # Optimal control of cooling through water for 1.0m-thick B-type lining concrete in the 11th warehouse of the non-pressure gentle slope section of the spillway tunnel

[0126] For the 1.0m-thick B-type lining structure of the 11th storehouse on the gentle slope section of the spillway tunnel, see Figure 11 , gate opening section, concrete strength C 90 35. Class III surrounding rock. The concrete is poured in two phases: first the side wall arch, then the floor. Here we introduce the optimal control of water cooling for side arch lining concrete pouring.

[0127] Such as figure 2 As shown, the optimal water temperature difference water cooling temperature control method for lining concrete with different thicknesses provided in this embodiment includes the following contents:

[0128] Step 1. Analyze the data related to water cooling and temperature control of lining concrete, including: collecting data related to temperature control and crack prevention of l...