High arch dam concrete temperature state interval predicting and early warning method

Abstract

The invention discloses a high arch dam concrete temperature state interval predicting and early warning method. The high arch dam concrete temperature state interval predicting and early warning method comprises the following steps: first, establishing a temperature dynamic prediction model, and performing rolling prediction on the temperature of concrete in a pouring silo in the next few days via the temperature dynamic prediction model; second, determining an upper value and a lower value of a dual-control early warning index in a typical age in a first-stage temperature control period of the concrete to obtain a temperature state early warning interval according to the temperature change law of the concrete in a poured silo; third, establishing a classification early warning mechanismaccording to the constrained characteristics of different dam sections, the temperature variation characteristics of a dam site area and the concrete temperature state change characteristics; and fourth, judging a temperature state warning level through the classification early warning mechanism according to a prediction result and the early warning interval, and taking corresponding response measures to realize dynamic correction of a temperature control measure. The technology provided by the invention solves the problem of insufficient objectivity and timeliness of the existing concrete temperature early warning method; a high arch dam concrete temperature state interval early warning method is provided; and process early warning of the first-stage temperature control period in which the temperature changes most drastically is realized.

Description

technical field [0001] The invention belongs to the technical field of temperature control and anti-cracking of large-volume concrete in water conservancy and hydropower projects, and in particular relates to a method for predicting and early warning of the temperature state range of high arch dam concrete. Background technique [0002] Temperature load is one of the main loads of arch dams. Because high arch dams need to bear large horizontal thrust, they are huge in size and complex in structure. It is difficult to prevent cracking. The maximum temperature is a key indicator of temperature control and crack prevention. If the maximum temperature of high arch dam concrete is too high, it will cause large foundation temperature difference, internal and external temperature difference, upper and lower layer temperature difference and temperature drop range, and it is easier to generate large tensile stress. When the tensile stress exceeds Cracks will occur when the tensile s...

AI Technical Summary

Problems solved by technology

[0016] The technical problem of the present invention is: to overcome the objectivity and timeliness of the existing concrete temperature early warning method, to provide a high arch dam concrete temperature state interval early warning method, and to realize the temperature control stage of the most severe temperature change. early warning

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