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Water cooling optimization control method for lining concrete with different thicknesses

A technology of water cooling and optimal control, which is applied in the direction of temperature control using electric methods, can solve the problems of no scientific control of lining concrete water cooling time, water temperature and temperature drop rate, etc., to achieve temperature control and anti-cracking, scientific strong effect

Active Publication Date: 2021-06-11
WUCHANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no method to scientifically control parameters such as water cooling time, water temperature and temperature drop rate of lining concrete according to the thickness

Method used

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  • Water cooling optimization control method for lining concrete with different thicknesses
  • Water cooling optimization control method for lining concrete with different thicknesses
  • Water cooling optimization control method for lining concrete with different thicknesses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Optimum control of water cooling of A-type lining concrete with a thickness of 0.8m in the gentle slope section of the flood discharge tunnel

[0078] For the 0.8m thick A-type lining structure of the gentle slope section of the spillway tunnel Figure 6 , the city gate tunnel-shaped section, along the axis of the flood discharge tunnel, set ring construction joints every 12m, Class II 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.

[0079] Such as figure 2 As shown, the optimal control method for water cooling of lining concrete with different thicknesses provided in this embodiment includes the following contents:

[0080] 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 lining concrete, analyzin...

Embodiment 2

[0092] Optimum control of water cooling of B-type lining concrete in the gentle slope section of the flood discharge tunnel with a thickness of 1.0m

[0093] For the B-type lining structure with a thickness of 1.0m in the gentle slope section of the spillway tunnel, see Figure 7 , Chengmen cave-shaped section, 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.

[0094] Such as figure 2 As shown, the optimal control method for water cooling of lining concrete with different thicknesses provided in this embodiment includes the following contents:

[0095] Step 1. Analyze the relevant information on the water cooling temperature control of the concrete lining structure:

[0096] As above, the basic information of the flood discharge tunnel of the Wudongde Hydropower Station is as mentioned above. The flood discharge tunnel i...

Embodiment 3

[0107] Optimum control of cooling through water for 1.5m-thick C-shaped lining concrete in the gentle slope section of the flood discharge tunnel

[0108] For the 1.5m-thick C-shaped lining structure in the gentle slope section of the spillway tunnel, see Figure 8 , the city gate cave-shaped section, and Class IV 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.

[0109] Such as figure 2 As shown, the optimal control method for water cooling of lining concrete with different thicknesses provided in this embodiment includes the following contents:

[0110] Step 1. Analyze the relevant information on the water cooling temperature control of the concrete lining structure:

[0111] The basic information of the flood discharge tunnel of Wudongde Hydropower Station is as mentioned above. The flood discharge tunnel is a Class 1 structure...

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Abstract

The invention provides a water cooling optimization control method for the lining concrete with different thicknesses, the water cooling time, the water temperature and the temperature drop rate which are optimally controlled and suitable for the lining concrete with the different thicknesses can be objectively and accurately obtained, water cooling is conducted on the lining structure on the basis, and temperature control and crack prevention are scientifically and reasonably achieved. The water cooling temperature control method comprises the following steps: 1, acquiring lining concrete water cooling temperature control data; 2, calculating the water cooling time Td = 2.05 H + 2.5 according to the thickness of the lining concrete; 3, according to the thickness of lining concrete, calculating the water cooling optimization control water temperature Twy according to the formula that Twy = 3.5 H + 9.5; 4, calculating the optimal control temperature drop rate Vc = 2.5-0.38 H according to the thickness of the lining concrete; and 5, optimizing and controlling the water temperature Twy according to the water cooling time Td, optimizing and controlling the temperature drop rate Vc, and optimizing the water cooling measures of the lining concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete temperature control and anti-cracking, and in particular relates to an optimal control method for water cooling of 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 of concrete during the temperature rise stage, the go...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/19
CPCG05D23/19
Inventor 段亚辉王雷吴博苗婷段次祎陈浩怀
Owner WUCHANG UNIV OF TECH
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