臺灣位處於處在歐亞板塊與菲律賓板塊交界處，板塊互擠壓碰撞釋放能量就會引發地震，伴隨著劇烈的地盤位移及地表振動，往往造成建物倒塌、橋梁斷裂及土壤液化等地震災害，國內既有橋梁基礎逐漸面臨結構老化及橋梁安全性不符新的耐震規範要求等問題，其修復補強工作確有其必要性，藉由妥善之維設管理進而提高其安全性及使用年限，有效管理國家資產。土壤液化為地震時造成橋梁基礎等工程結構物受損之重要因素之一，將依序介紹土壤液化成因、橋樑基礎土壤液化補強對策、補強工法，並以國內實際案例介紹其成果，提供各界參考。

Taiwan situates at the junction of the Eurasian and the Philippine plate. Earthquakes are caused by plates squeeze and collide which accompanied with severe site displacement and surface vibration that causes disasters such as collapse of buildings, breakage of bridges and soil liquefaction. Nowadays, existing foundations of bridges are encounter problems such as structural aging and bridge safety not in consonance with the new seismic code requirements increasingly in Taiwan. Therefore, bridges’ repair and reinforcement work are necessary by improving safety and service life through proper maintenance management and manage national assets effectively.
Soil liquefaction is one of the important factors that cause damage of engineering structures such as bridge foundations in earthquakes. This study will introduce the causes of soil liquefaction, countermeasures and reinforcement methods for bridge foundation soil liquefaction. And introduce its achievements with actual domestic cases to provide references for all walks of life.