一、引言随着铁路的大提速和重载列车的顺利开行,部分基础设施如桥梁等已不能满足当前运输能力的要求,特别是解放前及解放初期修建的桥中,木质桩基、浅基墩台较多。当时的设计标准低,承载力小;经过多年的运营,墩台的振动幅值超限,承载力满足不了“高速、重载”的要求,成为安全运输的瓶颈。本文就桥梁墩台基础托换加固方案的选择进行讨论。二、工程概况石德线25#下行桥位于石德线清凉店——尹庄问,中心里程K139+623。桥上线路 I. INTRODUCTION Along with the smooth development of railways and the smooth operation of heavy-haul trains, some infrastructures such as bridges have failed to meet the current transport capacity requirements, especially in the bridges built before the liberation and at the initial stage of liberation. The wooden piles, Pier more. At that time, the design standards were low and the bearing capacity was small. After many years of operation, the vibration amplitude of the abutment exceeded the limit and the bearing capacity could not meet the requirements of “high speed and heavy load” and became the bottleneck of safe transportation. This article discusses the choice of bridge abutment foundation underpinning reinforcement program. Second, the project profile Stone Line 25 # downlink bridge is located in Shide Line cool shop - Yin Zhuang asked, the center mileage K139 +623. Bridge on the line