Roller compacted concrete dam structural condition monitoring system and monitoring method

Abstract

The invention discloses a roller compacted concrete dam structural condition monitoring system and monitoring method. The system comprises a structural condition monitoring apparatus and a bending adjustment apparatus, and the structural condition monitoring apparatus is connected with the bending adjustment apparatus through a temperature sensing fiber. Based on temperature information obtained by the temperature sensing fiber, differences between a roller compacted concrete dam body and bedding plane thermal parameters are taken into consideration, calculation analysis is carried out based on equivalent analysis of such thermal parameters as a roller compacted concrete online expansion coefficient, specific heat and the like by use of a finite element temperature strain increment calculation form, at the same time, linear strain and tangent strain which are caused to a bedding plane and the body of a roller compacted concrete dam due to the differences of the thermal parameters are also taken into consideration, the structural condition of the roller compacted concrete dam is analyzed and evaluated, based on distributed monitoring of the temperature sensing fiber, the monitoring capability is greatly improved, the demand for actual structural condition diagnosis of the roller compacted concrete dam is well satisfied, and an important guarantee is provided for current roller compacted concrete dam structural condition health monitoring study.

Description

technical field [0001] The invention relates to a monitoring system and method for the structural performance of a roller compacted concrete dam, belonging to the field of safety and health monitoring of hydraulic engineering structures. Background technique [0002] Since the first RCC dam was successfully built in my country in 1986, it is estimated that about 50 RCC dams have been built or are under construction, which is one of the promising dam types for the development of dam engineering in my country. RCC dams with a height of more than 100m that have been built recently, are under construction, and are about to start construction include Longtan (216m), Jiangya (131m), Baise (126m), Dachaoshan (121m), and Mianhuatan (111m). The amount of roller compacted concrete exceeds more than 60% of the entire dam concrete amount. [0003] my country's roller compacted concrete dam technology was developed on the basis of absorbing foreign advanced technology in the 1980s, but ...

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Problems solved by technology

[0004] In 1968, Wilson, a professor of the Department of Civil Engineering at the University of California, first developed a two-dimensional temperature field finite element simulation program DOT-DICE for the U.S. Army Corps of Engineers, which was successfully applied to the Dworshak Dam. In 1985, engineers Tatro and Schrader of the U.S. Army Corps of Engineers further modified the program and used it for the temperature field analysis of the first roller compacted concrete dam (RCCD) in the United States, Willow Creak. In 1992, Japan’s Tobishima Corporation published a back analysis method based on finite elements based on measured data to obtain thermal and boundary property parameters. For the current structural behavior of RCC dams, it is urgent to develop a method that can actually detect RCC dams. Although various numerical simulation technologies for the temperature field of concrete dams are advanced, they are simulations after all, and there are huge problems in their authenticity and referenceability.

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