中文摘要：

针对软土地基上路堤快速施工并严格控制沉降的要求，以台缙高速公路为工程背景，利用设置试验段的方法，对托板桩处理路堤技术进行了现场试验研究．选取3个典型断面安装了各种监测仪器，在填筑时及填筑完成后一段时间内对各断面的土压力、沉降及深层水平位移进行了监测．现场试验结果表明，土拱效应与桩土差异沉降有关，只有当差异沉降达到一定值后，路堤中才有明显的土拱效应；桩土桩体荷载分担比在65％～80％，并随着托板面积置换率的增大而增大；各断面沉降量较小，且稳定较快；路基深层水平位移较小．

英文摘要：

Aiming at the requirements for rapid construction and strict deformation of embankment on soft ground, a cap-pile supported embankment technique was presented and studied based on field tests of Tai-Jin expressway. Three typical sections were instrumented with lots of gauges, and earth pressure, settlement and horizontal displacement were monitored during the progress of loading. It was observed that the soil arching was related with the differential settlement between the pile cap and the foundation soil. The proportions of loads carried by pile were in the range from 65% to 80% and increased with the enlarging cap size or the reducing pile spacing. All the settlements and horizontal deformations obtained from these sections were very small, and the embankment became stable in short period.