A Feedback Method for Actual Temperature Load of High Arch Dam

Abstract

A method for feeding back the actual temperature load of a high arch dam comprises the following steps that (1) distributed temperature measuring optical fibers are embedded, and the real measured temperatures of the typical dam section in a river direction of the high arch dam are obtained by measuring; (2) the values of all moments corresponding to the real measured temperatures are calculated; (3) a multiple-term formula is used for signifying the equivalent temperatures of the typical dam section in the river direction of the high arch dam, and the distribution function of the equivalent temperatures of all the moments of the typical dam section in the river direction of the high arch dam is obtained; (4) a diagram is drawn according to the distribution function, obtained in the step (3), of the equivalent temperatures of all the moments, namely the feedback of the real temperature load of the high arch dam is obtained. According to the method for feeding back the actual temperature load of the high arch dam, on the basis that a moment method and distributed optical fiber temperature measurement are combined, the linear equivalent temperature concept used in the current arch dam design standard is extended, the advantage of distributed optical fiber temperature measurement line temperature measuring and the advantages of real-time temperature measuring are fully utilized, the temperature distribution of the typical dam section in the river direction is obtained through measurement, and the defect that the temperature information is small when a point thermometer is used for measuring is overcome.

Description

technical field [0001] The invention relates to the field of dam information data feedback, in particular to a method for feedback of actual temperature load of a high arch dam. Background technique [0002] Temperature load is one of the main design loads of arch dams, which is the load generated by the temperature difference between the quasi-stable temperature field of the dam body after joint grouting and the temperature field when the arch is closed. Since the temperature field of an arch dam is a function of time, the temperature inside the dam changes continuously from the grouting of the dam body to the normal operation of the reservoir. The existing arch dam design code (SL282-2003) generally uses the full-section linear equivalent temperature of three characteristic temperature fields, namely, the arch closure temperature, the annual average temperature field during the operation period, and the variable temperature field during the operation period, to calculate t...

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Problems solved by technology

However, the feedback of the actual temperature load of high arch dams based on distributed optical fiber temperature measurement has not been reported yet.

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