| Summary: | 碩士 === 華梵大學 === 環境與防災設計學系碩士班 === 107 === In this study, the slope of the Huafan University campus was used as the test site, and the automatic groundwater level monitoring data of slope was analyzed, and the simple residual maximum water level measuring tube data observed in this research project was analyzed and compared. Then, the laboratory sand box test was used to simulate the distribution of slopes, faults and groundwater level in the study area of Huafan University, and explore the impact of water level changes on the stability of the test site.
In the slope monitoring analysis, this study uses the residual maximum water level measuring data and the instantaneous water level data, and the automatic water level monitoring tube W1 data to carry out inter-comparison, observe and analyze the relationship between rainfall and groundwater level, and Consolidate into charts to facilitate discussion of trends. The results show that when a rain event occurs, the maximum water level of the residual water level set in this study can fully capture the maximum elevation of the groundwater level compared with the conventional traditional electric water level measurement.
In the sandbox test section, the test results are compared with the existing measurement data by simulating different rainfall amount and different rainfall patterns. The test results show that the sandbox test will simulate the phenomenon that the groundwater flows over the fault layer and then to the downhill slope. In the comparison of the front-peak and the post-peak simulated rainfall, the post-peak type raises the water level faster than the front-peak type. It is inferred that the post-peak rainfall will cause more serious damage to the study slope.
In the slope stability section, this study uses the STABL6 program to investigate the change of safety factor corresponding to groundwater level under different time and conditions, and to explore the relationship between groundwater level elevation, slope displacement increment and safety factor. As a result, the relationship between water level uplift, safety factor and displacement increment is established. After the groundwater level change is obtained in the future, the relationship curve can be used to understand the slope displacement increment and the slope safety factor.
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