為探討深開挖工程順打工法鋼支撐受力行為及溫度對鋼支撐受力影響，本研究針對台北市中山區一順打深開挖工程進行監測部分斷面，開挖過程中支撐受力情形，且利用自動化監測系統全天候監測振弦式支撐應變計，其應變計亦含有量測溫度的功能。本研究亦沿用前人研究，將溫度所造成的支撐荷重與純粹由外力所引起的支撐荷重作一區分，並且扣除溫度變化造成的支撐荷重變化後，反算視土壓力與各學者所提供之視土壓力包絡線作一比較。研究結果顯示，溫度所造成的支撐荷重於長路支撐會高於短路支撐，並且越底層支撐溫度所造成的支撐荷重越高。另外，本研究亦發現越靠近連續壁之支撐受力較大於中間支撐及越底層支撐受力差距越大。由數值分析成果顯示，支撐在未施加預力的情況下，利用連續壁為擋土壁於乾砂作淺層開挖時，其擋土壁勁度的改變、支撐勁度的改變及預力的施加僅會對視土壓力造成些微的變化。

The purpose of this research is to study the behavior of strut loads in a building project in Taipei. The strut load and temperature altogether were measured using thermally matched vibrating wire strain gauges and automatic monitoring system. The way to separate earth load from thermal load induced in the struts due to temperature variation throughout construction from previous studies is also presented here in. A comparison of apparent earth pressure between previous empirical formulas and the earth load separated from measured load is also presented. This research, shows that；the strut load induced by temperature in the longer direction will higher than in the shorter direction. The strut load near the retainting wall will be higher than the strut load near the center of excavation. The difference between the measured load in the strut near the diaphragm wall and the strut near the center of excavation is observed to increase with increase in depth. The results indicate that the stiffness of diaphragm wall and strut will have little effect on the strut load.

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