中文摘要：

结合宁启线提速改造过程中桥涵施工两处工点土压力的监测数据,对支墩土压力的分布特征进行了研究。通过分析振弦式土压力计采集到的土压力数据,发现了支墩不同深度、不同位置处土压力非线性分布的一些规律,并对土压力监测时传感器埋设的最佳位置给出了建议。土压力监测作为既有线桥涵施工防护的重要内容,可以为施工过程中保障列车安全行驶和施工顺利进行提供重要的依据和指导,论文研究成果可为类似工程提供借鉴和参考。

英文摘要：

Based on the earth pressure monitoring data from two construction sites of Nanjing-Qidong railway speed transformation works, the study on earth pressure around the buttress was carried out. By analyzing the earth pressure data collected by vibrating wire cells, the nonlinear pressure distribution characteristics at different depth and position were discovered and the best installing position of earth pressure cell was suggested. Earth pressure monitoring is the main safety guard measure in the renovation works and which is an important reference and guidance for the railway safety traffic and the construction. The research results can be referred for the similar engineering works.