Application Research on Distributed Optical Fiber Monitoring Technology in Static Load Test of Large Diameter and Post-grouting Filling Pile

摘要

The Static load test of the post-grouting filling pile in Zhengzhou city's third ring road rapidness project, uses strain gauge and distributed optical fiber to track and monitor the evolution rule of load-settlement, pile body stress, pile side resistance, etc., interprets bearing properties of large diameter post-grouting filling pile, contrasts and analyzes the monitoring data obtained by optical fiber and strain gauge at the same time. The result shows that, the monitoring effect of the pile body stress obtained by distributed optical fiber technology is superior to the strain gauge, but the data of them still needs to verify each other.