上填下挖高挡墙的新型处理方法

A New Method for Retaining Walls with Partial Cut and Partial Fill

实际工程中常遇到上填下挖的高挡墙,此种高挡墙由于各种因素限制,按传统的全挖或全填的支挡方式处理均不合理且不经济。结合一工程实例采用排桩支护与加筋土挡墙结合的复合式挡土墙很好地解决了上填下挖高挡墙的问题。此种支护方式将传统的挖方区支护结构与填方区支护结构结合起来,不仅施工方便,而且工程造价较传统支护方式偏低。此外由于仅是把传统的两种支护方式结合,实际工程中计算和施工不存在新的困难。

Retaining walls in partial cut and partial fills are frequently encountered in the construction practice. However, the design of these walls are assumed either completely in the cut or completely in fills so that the construction these walls are often not cost effective. This paper discusses a new approach of using composite structure for the design and construction of partial cut and partial fill retaining walls with the combination of secant pile for the cut portion and reinforced earth wall for the fill. This combination of different retaining wall types do not require new design and construction methodology so that it can be widely applied.