桩基挡土墙在公路支挡防护优化设计中的应用

桩基挡土墙作为一种新型路基支挡结构，可承受较大的水平荷载，适合在地形较陡、地基承载力较低的条件下采用。基于桩基挡土墙设计原理和方法，对某高速公路K40+430～+514段高填方路基段设计采用这种支挡结构。实践证明，该支挡结构安全可靠、经济效益显著，可供其它类似工程参考。

Application of Retaining Wall of Pile Foundation in Optimization of Retaining and Protection Design for Highway

As a new protection and retaining structure for subgrade, retaining wall of pile foundation can bear large horizontal load, and is applicable to the conditions, such as steep landform and lower bearing capacity of foundation. Based on the design principle and method of such retaining wall, it was adopted in the high fill subgrade for the K40 ＋ 430 - ＋ 514 Section of a highway. The practice has proved that this retaining structure is safe and reliable with significant economic efficiency, and may be referred to by similar engineering.