坡地監測及滑動的力學數值分析與風險度之研究

Study on the monitoring results and numerical analyses of mechanical model for slope sliding and risk assessment

鄭清江(Ching-Jiang Jeng) ； 林正陽(Younger Lin) ； 王程右(Cheng-You Wang)

《華梵藝術與設計學報》 13期 (2018/10) Pp. 14-37

摘要

本文將現地量得之傾斜管各種監測型態曲線，利用力學的數值分析方法，分析地層變位機制，探討傾斜管變位型態的力學理論模式。可做為業界對於坡地安全監測的正確判釋、安全分析與風險評估等。研究結果獲致剪裂帶之有效抗剪強度尖峰內摩擦角平均約26.3度，而殘餘內摩擦角平均約23度。坡面的地層位移與滑動區塊分布情況，經由數值分析與實際傾斜管觀測結果比對，獲得變位曲線一致的趨勢，此有助於解釋觀測結果所得坡面位移之力學機制現象，亦可解釋傾斜管為何會出現頂部往負向位移的原因，並顯示淺層與深層不同潛在滑動區塊的分布。風險評估研究結果，預估邊坡在未來降雨事件中的災害機率，可以針對未來的豪大雨事件進行邊坡風險預警。

關鍵字

傾斜管 ； 數值分析 ； 坡地滑動機制 ； 邊坡風險評估

並列摘要

This project is to analyze displacement mechanics of strata and to study mechanical model of slope displacement revealed by inclinometers by means of numerical analyses from various curve patterns of monitoring. It also carries out to evaluate sliding risk of the slope according to the results of numerical analyses of the mechanical model. Samples of soil and rocks will be collected and tested to be analyzed. The friction angle of the shear zones are obtained and the displacement of the slope and distribution of sliding blocks are analyzed by numerical model and compared with the field monitoring results. This can make complete achievements of the application of monitoring systems to slope engineering. For monitoring of slope safety in the industrial field, these achievements can also be important references of correct interpretation, and safety analyses, and risk assessment.

並列關鍵字

Inclinometer ； numerical analysis ； slope sliding mechanism ； slope risk assessment