Strain sensor multi-directional installation method

Abstract

The invention discloses a strain sensor multi-directional installation method. The method comprises the steps that a. a support bar is erected; b. the number of layout layers of sensors is determined, and according to actual monitoring requirements, direction sensors are laid at layers of different heights; c. the layout direction of the direction sensors of each layer is determined, and layout is carried out in at least three directions; d. a zero stress tube is erected, and the zero stress tube and the support bar are welded; and e. the direction sensors are arranged, and the sensors are tied on steel supports in different directions through iron wires. According to the invention, the problem of difficult concrete strain monitoring in a plurality of directions is solved; the method has the advantages of low sensor damage rate, reliable fixing, direction change prevention and firm zero stress tube erection; in a concrete pouring process and after solidification, the sensors can accurately reflect the actual temperature inside concrete and real strain changes; and the support bar has the advantages of simple structure, convenient material drawing, convenient installation and construction and high application and promotion value.

Description

technical field [0001] The invention relates to the field of temperature and strain monitoring of concrete internal structures in engineering practice activities, relates to a multi-directional installation method of strain sensors, and is particularly suitable for monitoring internal temperature and multi-directional stress during mass concrete construction. Background technique [0002] With the development of building structure construction technology, mass concrete construction is also increasing day by day, and the temperature stress and improper maintenance inside the structure often cause the tensile stress of the concrete to exceed its tensile strength and cause harmful cracks during the construction process and after construction. Therefore, the monitoring of concrete temperature and stress is particularly important. The conventional practice of this monitoring is to bind the sensor on the steel bar or prestressed anchor cable (or steel strand), and then directly bur...

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Problems solved by technology

[0002] With the development of building structure construction technology, mass concrete construction is also increasing day by day, and the temperature stress and improper maintenance inside the structure often cause the tensile stress of the concrete to exceed its tensile strength and cause harmful cracks during the construction process and after construction. Therefore, the monitoring of concrete temperature and stress is particularly important. The conventional practice of this monitoring is to bind the sensor on the steel bar or prestressed anchor cable (or steel strand), and then directly bury it. There are two shortcomings in this embedding method: on the one hand, the sensor is often damaged or the reading is inaccurate due to the impact force and vibration during concrete pouring, and the monitoring results cannot well reflect the actual internal structure of the concrete. And stress changes. On the other hand, the cost of the sensor is high, and it requires a lot of manpower, material resources, and financial resources. After being embedded in concrete, once it is damaged, it cannot be repaired, which brings disadvantages to monitoring, so that it cannot better guide construction and maintenance. Directly affect Structural construction safety, quality and other important issues

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