Monitoring method of cast-in-situ prestressed concrete members and tensile stress of prestressed steels

Abstract

The invention discloses a monitoring method of cast-in-situ prestressed concrete members and tensile stress of prestressed steels. The monitoring method of the cast-in-situ prestressed concrete members and the tensile stress of the prestressed steels comprises the following steps: (a) initial installation of monitored prestressed steels in a protection device: penetrating the monitored prestressed steels into through holes in the plugging center of a movable port of the protection device from a guiding pipe and then penetrating out of the through holes of the plugging center of a fixed port from the guiding pipe body; (b) installation of a steel rope gauge: stripping outsourcing layers which penetrate out of the prestressed steels of the procedure (a) to a certain range, directly fixing the steel rope gauge on the prestressed steels of stripped outsourcing layers, placing the prestressed steel with the steel rope gauge into the guiding pipe body of the protection, drawing out the steel rope gauge wires from guide wire holes of the guiding pipe body and welding a movable seal of the other end with the guiding pipe body; and (c) data acquisition of the steel rope gauge: drawing out the guide wires of the steel rope gauge obtained from the the procedure (b) and connecting the guide wires of the steel rope gauge with the the external data acquisition device. The data acquisition device is connected with a computer. The monitoring data of the monitoring method of the cast-in-situ prestressed concrete members and the tensile stress of the prestressed steels are stable and reliable.

Description

technical field [0001] The invention relates to a method for monitoring tensile stress, in particular to a method for monitoring the tensile stress of prestressed steel bars of cast-in-place prestressed concrete components, and belongs to the field of civil engineering. Background technique [0002] Prestressed concrete is to avoid premature cracks in reinforced concrete structures, make full use of high-strength steel bars and high-strength concrete, and try to reduce the tensile stress on the components by applying external forces before the concrete structures or components bear the load in use. Concrete members under compressive stress. To delay the appearance and development of concrete cracks, thereby improving the crack resistance and stiffness of components. [0003] After nearly half a century of development, the prestressed concrete structure has now become a very important structural form in civil engineering. The application of prestressed concrete has expande...

AI Technical Summary

Problems solved by technology

After the concrete sets and hardens, it will limit the expansion and contraction of the cable meter, thus making it lose its monitoring function

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