深基础土方开挖支护方案比选

以厦门环东海域南沙滩护岸整治工程中的盖板涵基础开挖支护方案为例,针对盖板涵设计线路施工部位受限、地下水位影响等特点,通过技术经济分析比对,选择可行的施工方案。对类似施工项目具有一定的借鉴意义。

Plan selection of bracing projects for deep foundation excavation

In order to solve the problem of slab culvert for the excavation of deep foundation in the revetment regulation engineering of Xiamen ring east sea sand beach,we put forward four slab culvert foundation excavation supporting schemes for comparison,that is,the high pressure jet grouting pile plus steel sheet pile support scheme,the steel sheet pile support scheme,the Soil nailing wall supporting scheme and the axis changing design scheme. Through the technical and economic analysis,we finally chose the axis changing design scheme,excavating the deep foundation pit into the general foundation construction. Practice shows that comparing several schemes is a system engineering that is complicated,involving many factors including not only technical and economic factors but also some other related factors such as the project itself and other related project internal and external factors. Only we have to be thoughtful,we can choose the best scheme.