Under-anchor effective pre-stress counter-pull detection result discrimination method capable of eliminating influence of clamping piece

• Main Authors: WANG WEIFANG, LIU SHIJIAN, LIANG QIANXUE, NING YIHAO, YANG YUHOU
• Format: Patent
• Language: Chinese; English
• Published: 05.05.2023
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

The invention provides an under-anchor effective pre-stress counter-pull detection result discrimination method capable of eliminating the influence of a clamping piece, which is characterized in that a front sensor and a jack which are arranged on a steel strand are connected with a central control panel for data acquisition and processing and then detection is carried out, and the method comprises a counter-pull stage, a load holding stage and an unloading stage. According to the invention, the tensioning force of the jack and the displacement of the clamping piece are monitored in real time, so that double-control counter-pulling is realized; the clamping piece state is identified according to the clamping piece displacement, and the clamping piece occlusion effect influence and the dynamic friction influence caused by clamping piece installation dislocation are eliminated; by means of the method, the accuracy of the detection result and the safety of the detection process can be guaranteed, and large unde