Optimal water temperature difference cooling and temperature control method for lining concrete with different strengths

A water cooling and concrete technology, applied in temperature control, control/regulation system, non-electric variable control, etc., can solve the problems of increased heat of hydration, high internal temperature, increased cement consumption, etc., to achieve strong scientific, Realize the effect of temperature control and crack prevention

Active Publication Date: 2022-04-29
WUCHANG UNIV OF TECH +1
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  • Abstract
  • Description
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Problems solved by technology

[0005] However, the strength of lining concrete increases, the amount of cement increases, the heat of hydration increases, and the higher the internal temperature

Method used

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  • Optimal water temperature difference cooling and temperature control method for lining concrete with different strengths
  • Optimal water temperature difference cooling and temperature control method for lining concrete with different strengths
  • Optimal water temperature difference cooling and temperature control method for lining concrete with different strengths

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Embodiment Construction

[0083] Below in conjunction with the accompanying drawings, taking the lining concrete with different structural thicknesses of the flood discharge tunnel project of Wudongde Hydropower Station as an example, the specific implementation scheme of the optimal water temperature difference cooling and temperature control method for lining concrete with different strengths involved in the present invention will be described in detail.

[0084]

[0085] Wudongde Hydropower Station is mainly used for power generation, taking into account the functions of flood control, shipping and sand retention. The installed capacity of the power station is 10200MW. The dam is a concrete double-curvature arch dam, and the flood discharge adopts the main flood discharge of the dam body, supplemented by the flood discharge tunnel on the bank. The three flood discharge tunnels all adopt a pressure tunnel followed by a door tunnel, which is composed of a water inlet, a pressure tunnel section, a wo...

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Abstract

The invention provides a temperature control method for optimal water temperature difference water cooling of lining concrete with different strengths, which can objectively and accurately obtain parameters such as water temperature difference, water temperature, and temperature drop rate suitable for concrete with different strengths, and based on this, water cooling can be performed on the lining structure , scientifically and reasonably realize temperature control and crack prevention. The water cooling temperature control method includes: Step 1. Obtain the data for water cooling temperature control of the lining concrete; Step 2. Calculate the water cooling optimization control water temperature difference ΔT according to the strength of the lining concrete wy ; Step 3. Estimate the maximum temperature T inside the concrete according to the strength of the lining concrete max ; Step 4. Calculate the optimal control water temperature T for water cooling wy ; Step 5. Calculating the optimization time T of water cooling j ; Step 6. Optimal control temperature drop rate V according to the strength calculation of the lining concrete y ; Step 7. Optimal control of water temperature T according to water cooling wy , optimization time T j , Optimal control of temperature drop rate V y Optimize water cooling measures.

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 strengths. 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 o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/20E02D15/02
CPCG05D23/20E02D15/02
Inventor 段亚辉吴博王雷段次祎苗婷陈浩怀
Owner WUCHANG UNIV OF TECH
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