Binding strength detecting instrument for waterproof layer of bridge

Abstract

The invention discloses a detection instrument for bonding strength of a waterproof layer of a bridge. The detection instrument comprises a driving motor, a transmission shaft driven by the driving motor, transmission gears and a roller wheel which are sleeved on the transmission shaft, racks engaged with the transmission gears, a moving box body driven to move forward by the racks, a tension sensor used for performing real-time detection on a tearing force acting on a detected waterproof layer, a data acquisition and control system used for analyzing and processing a signal detected by the tension sensor and controlling the driving motor, and a host computer, wherein the roller wheel is provided with a tearing tape; the tearing tape is connected with the detected waterproof layer through a tearing clip; the roller wheel and the transmission gears are coaxial and have the same pitch diameter; and the data acquisition and control system is an MSP430 singlechip and performs two-way communication with the host computer through a USB interface. The detection instrument has reasonable mechanical structure, small volume, light weight, high automation degree, and simple and convenient use and operation, can effectively perform the real-time detection and control on the detected waterproof layer, and greatly improve test accuracy.

Description

technical field [0001] The invention relates to a bond strength detection device, in particular to a bridge waterproof layer bond strength tester. Background technique [0002] In 1979, the U.S. Federal Comptroller General submitted a report to Congress, pointing out that the main purpose of setting up a waterproof layer on the bridge deck is to ensure and improve the durability of the bridge. For example, to prevent the concrete damage of the bridge deck due to freezing and to protect the steel bars of the main girder from corrosion, etc., and setting up a reasonable bridge deck waterproof system is one of the most effective measures, and it is believed that the cost-benefit ratio of setting up a waterproof layer is 1:2.75 . However, in actual engineering, problems such as water seepage of overpass bridge deck, peeling of pavement layer, alkali-aggregate reaction, and broken bridge deck must be studied from the perspective of bridge deck waterproofing to help improve the s...

AI Technical Summary

Problems solved by technology

Although the above measures have been taken, the infiltration of free water cannot be guaranteed. The free water moves slowly and corrodes the steel bars and prestressed steel bars. Especially in winter, when snow is removed and salt is sprinkled, the infiltrated salt water has a greater effect on the corrosion of steel bars.

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