Calculation method of interior highest temperature of lining concrete for door-opening-shaped fracture surface during construction period

Abstract

The invention discloses a calculation method of interior highest temperature of lining concrete for a door-opening-shaped fracture surface during a construction period. The method comprises the steps of taking lining thickness, concrete strength grade, pouring temperature, water cooling and water temperature, an air temperature and others to a calculation formula in order to obtain corresponding lining structures and interior highest temperature of concrete during the construction period for the scheme of temperature control measures.The calculation formula is capable of optimizing and designing a temperature control scheme by calculating multiple groups of simulated measurement schemes for interior highest temperature with the calculation value less than the highest temperature in economically feasible manner. The calculation method of interior highest temperature of lining concrete for the door-opening-shaped fracture surface during the construction period can reflect impact of lining thickness, concrete strength grade, pouring temperature, water cooling and water temperature on interior highest temperature. Errors of the calculation value, on-site measurement and calculation results of a finite element method are small. The error rate of a real example is only 2.3%. The method is high in precision and easy in calculation. The calculation method of interior highest temperature of lining concrete for the door-opening-shaped fracture surface during the construction period is capable of calculating interior highest temperature of concrete and can be used for optimizing and designing a temperature control anti-cracking scheme. The method can be prompted and applied and especially used for real-time rapid design and calculations of pre-design and construction periods.

Description

technical field [0001] The invention relates to the technical field of temperature control and anti-cracking of engineering structure concrete, in particular to a method for calculating the maximum internal temperature during the construction period of the lining concrete with a doorway-shaped section. Background technique [0002] The large-section high-strength underground hydraulic lining concrete constructed in recent years will produce a large number of cracks without exception unless effective temperature control measures are taken, and most of them are penetrating temperature cracks during the construction period (see figure 1 a and figure 1 b). The existence of hazardous cracks seriously affects the integrity, safety, construction schedule and duration of the engineering structure, leading to leakage or even penetration damage, durability and life, project cost and aesthetics, and may induce the occurrence and development of other diseases. Therefore, the control o...

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Problems solved by technology

[0017] Based on the above situation, the calculation method of the maximum temperature during the construction period of lining concrete is not perfect at present. The finite element method needs to carry out the concrete mix ratio and a large number of performance parameter tests first. The test and simulation calculation need to spend more time and money, so it is not applicable Quickly adjust the scheme during the preliminary design stage and during construction

The calculation method of the maximum temperature of mass concrete, the error is often large

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