Rapid calculation method capable of calculating concrete casting temperature at maximum ambient temperature casting time interval

A technology of ambient temperature and pouring temperature, applied in computer-aided design, calculation, design optimization/simulation, etc., can solve problems such as errors and complex calculation process

Active Publication Date: 2017-06-13
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0008] At present, the explicit difference decomposition method is generally used to calculate the concrete pouring temperature, the calculation process is very complicated, and there are errors, which need further improvement

Method used

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  • Rapid calculation method capable of calculating concrete casting temperature at maximum ambient temperature casting time interval
  • Rapid calculation method capable of calculating concrete casting temperature at maximum ambient temperature casting time interval
  • Rapid calculation method capable of calculating concrete casting temperature at maximum ambient temperature casting time interval

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Embodiment Construction

[0059] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0060] 1. The quick calculation method for calculating the concrete pouring temperature during the pouring period of the highest ambient temperature disclosed by the present invention includes:

[0061] 1. Calculation of daily average ambient temperature during pouring.

[0062] (1) The daily average outside temperature during the pouring period is:

[0063] T a =T am +ΔT a (1)

[0064] Among them, T a is the ambient temperature, here is the daily average ambient temperature, in °C; T am is the daily average temperature in °C; ΔT a is the daily average ambient temperature increase caused by solar radiation heat, in °C.

[0065] (2) Calculation of solar radiation equivalent air temperature

[0066] The daily average solar radiation heat is:

[0067] S=S 0 (1-kn) (2)

[0068] Among them, S is the daily average solar radiant heat con...

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Abstract

The invention provides a rapid calculation method capable of calculating concrete casting temperature at a maximum ambient temperature casting time interval. According to finite element calculation, relationships among parameters such as temperature rise during casting of a paving layer, casting thickness, outside air temperature, paving layer casting time, heat conductivity coefficient, surface heat transfer coefficient and thermal conductivity coefficient are derived, calculation results are verified by a finite element calculation method, temperature rise during casting of the paving layer can be calculated without differential calculation or finite element calculation, and the calculation process is simple. According to the calculation method, the daily average casting temperature can be calculated, the casting temperature at the maximum ambient temperature casting time interval can be calculated, and the calculation results are more suitable for practical engineering application. Besides, the influence of hydration heat evolution of concrete during casting on the concrete casting temperature is estimated by hydration degree theory, and casting temperature calculation accuracy is improved.

Description

technical field [0001] The invention relates to a fast calculation method capable of calculating the concrete pouring temperature during the pouring period of the highest ambient temperature, and belongs to the technical field of water conservancy and hydropower engineering. Background technique [0002] During the concrete pouring construction process, the 1.5-3.0m thick pouring layer needs to be divided into several pavement layers. For example, when the thickness of the pavement layer is 0.3m, for the 1.50m thick pouring layer, it needs to be divided into 5 pavement layers Upward pouring, set the temperature of the concrete entering the warehouse as T 1 , After closing and pouring of the pavement layer, when the upper layer is covered with new concrete, the temperature of the old concrete is the pouring temperature. In actual engineering, the pouring temperature measurement point is generally 10cm below the surface of the pavement. [0003] Controlling pouring temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/08Y02E60/00
Inventor 朱振泱张国新汪娟王振红刘毅侯文倩
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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