爱华隧道施工对云南云县台水管倾斜观测影响分析

Influence of Aihua Tunnel Construction on the Observation of DSQ Water Tube Tiltmeter at Yunxian Seismic Station, Yunnan Province

摘要:

收集整理云南云县台观测山洞周边环境变化参数及相关岩石力学参数，运用不规则载荷模型模拟计算荷载引起的倾斜变化量。结果显示，爱华隧道施工的挖土卸载变化对台站倾斜量有一定影响，水管倾斜仪NS、EW两方向倾斜影响量分别为147.332 004 5×10^-3"和108.560 424 3×10^-3"，这与2017年实际观测倾斜量的186×10^-3"和150×10^-3"在同一量级。研究结果从定量模拟的角度证实了荷载变化对云县台水管倾斜仪NS向北倾、EW向西倾变化和2017年倾斜变化量减小的异常有一定影响。

Abstract:

In this study, the environmental change parameters and related rock mechanics parameters around the observation cave in Yunxian County were collected and sorted, and an irregular load model was used to simulate and calculate the tilt changes caused by the load change. The results show that the unloading change induced by the excavation of Aihua tunnel construction has a certain influence on the observation of DSQ tiltmeter at the Yunxian seismic station. The tilt changes of NS and EW directions are 147.332 004 5×10^-3" and 108.560 424 3×10^-3", respectively, which are of the same order of the actual tilt observed in 2017 (186×10^-3" and 150×10^-3", respectively). The results indicate that the load change has a certain influence on the tilt changes in the NS and EW directions as well as on the abnormal decrease of tilt changes in 2017.