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深圳某工程占地面积53400m2,项目区靠海洋一侧地面高程最低接近2.0m,靠山脉侧最大标高为56.38m,最大高差超过50m。施工现场高差较大,基础底(顶)标高难以确定。以本工程34栋(B2型)为例,其基础底(顶)标高的确定:(1)必须经地质部门鉴定基础下为稳定的坡地后方可施工;(2)基底进入持力层深度不得小于300mm;(3)高处基础顶标高不高于相对标高-4.550m;(4)邻近挡土墙的基础底标高不得低于挡土墙底标高;(5)基础底持力层高差不大于1∶1的
A project in Shenzhen covers an area of 53400m2. The lowest ground elevation on the ocean side of the project area is close to 2.0m. The maximum elevation on the mountainside is 56.38m and the maximum elevation difference exceeds 50m. Large elevation difference at the construction site, the basis of the bottom (top) elevation is difficult to determine. Take the project 34 (type B2) as an example, the foundation bottom (top) elevation must be determined: (1) It must be stablished after the stable slope has been identified by the geological department; (2) The depth of the foundation into the holding layer should not be Less than 300mm; (3) at the height of the top of the base elevation is not higher than the relative elevation of -4.550m; (4) the basement elevation of the adjacent retaining wall shall not be lower than the elevation of the retaining wall; (5) Not more than 1: 1