A Concrete Dam Distributed Temperature Measuring Optical Fiber Twin-strand "Z-shaped" Concrete Buried Construction Method

Abstract

The invention relates to a concrete dam distributed temperature measurement optical fiber double-strand Z-shaped through channel buried construction method. Before buried construction of each channelof concrete, double strands of distributed optical fibers are bundled and paid off; a Z-shaped through channel is arranged on the horizontal plane; an odd-even-channel optical fiber alternate rising mode is adopted for each dam section in the vertical direction, and an odd-even-channel optical fiber bilateral symmetry arrangement mode is adopted in the horizontal direction. Through the construction method, the buried survival rate of optical fibers can be increased; the two ends of each optical fiber can be arranged to be a main measuring head and a standby measuring head in advance correspondingly; when the optical fibers arranged in the cast concrete are broken accidentally, the standby measuring heads are enabled, and the internal temperature of concrete of the whole dam sections can bemonitored. Through the construction method, richer and more reliable basis data can be provided for construction, initial impoundment, operation period scientific research, dynamic simulation and feedback analysis of the concrete dam. The construction method has great significance on reconstruction of two-dimensional and three-dimensional true temperature fields of all stages of the dam body construction period.

Description

technical field [0001] The invention belongs to the technical field of concrete dam construction, and in particular relates to a concrete dam distributed temperature-measuring optical fiber double-strand "Z-shaped" through-silo burying construction method. Background technique [0002] No matter in the construction period or the operation period, the monitoring of the internal temperature of the concrete dam is of great significance. During the construction period, almost all concrete dams must take temperature control measures to reduce the temperature gradient inside the dam body, prevent the occurrence of temperature cracks, and ensure the safety of the dam. Therefore, timely and accurate acquisition of temperature data inside the dam body concrete is a large volume The key to concrete temperature control; during the operation period, the temperature load is the main load that causes the deformation and stress changes of the dam body. Therefore, the monitoring of the temp...

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Problems solved by technology

[0003] Traditional dam body temperature monitoring generally uses point-type thermometers, mainly thermocouple thermometers. This kind of thermometer itself has high accuracy, but in terms of practical application in concrete dam engineering, there are the following shortcomings: (1) A thermometer can only Measure the temperature of a point; (2) Strict requirements on the working environment, poor anti-interference ability, complex installation and interference construction; (3) Too little information on the thermometer, it is difficult to grasp the change of the temperature field inside the entire dam body

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