本研究以PYWALL軟體進行模擬，應用其系統考慮土壤結構互制關係的優勢，有效模擬柔性擋土牆之變形行為，分析邊坡擋土系統之牆頂旋轉角變化，以定義場址預警值，再搭配客製化無線監測系統對研究場址進行自動化監測，並建立預警架構。研究場址位於台20線52k處之公路邊坡擋土系統，此場址過去曾有破壞之歷史，至今邊坡仍處於不穩定狀態。研究利用可量測地下水位、土壤分層含水量、地表傾斜、擋土牆傾斜與擋土牆裂縫變化等功能之客製化監測系統進行現地監測，監測模組以廣為應用之微機電系統搭配不同感測器，結合資料儲存及無線通訊功能模組，於選定場址內形成區域網路，再透過LTE(4G)技術將監測數據即時上傳至雲端平台。研究以地下水位做為改變因子，應用PYWALL軟體模擬現地水位升降時，對於現地擋土牆變形影響，據此定義出研究場址之旋轉角預警值為0.3°~0.35°及地下水位深度預警值為2.9至4公尺，與現地監測比對其結果後與預警值吻合，顯示模擬預警值具有參考性。

This study uses PYWALL software to simulate, apply consider the advantages of soil-structure interaction, effectively simulate the deformation behavior of flexible retaining wall, analyze the change of wall top rotation angle of slope retaining system to define the site warning value. The monitoring site is monitored automatically by the customized wireless monitoring system and a warning framework is established. The monitoring site is located on the roadside slope retaining system at South Cross-Islond Highway 52K. This site has a history of destruction in the past, and the slope is still in an unstable state. The research uses the customized monitoring system that can measure the groundwater level, soil water content, surface inclination, retaining wall inclination and cracks in the retaining wall. The monitoring module is widely used in the MEMS system. With different sensors, combined with data storage and wireless communication function modules, a regional network is formed in the selected site, and the monitoring data is instantly uploaded to the cloud platform through LTE (4G) technology. In the study, the ground water level is used as the change factor, and the PYWALL software is used to simulate the local water level rise and fall to know the influence of the existing retaining wall deformation. The warning value of the rotation angle of the monitoring site is defined as 0.3°~0.35° and the ground water depth warning value is 2.9 to 4 meters, which is fit with the warning value after the results of the monitoring. It shows that the simulated warning value is informative.

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