人工填土地基勘察中应注意的问题

Issues Frequently Encountered in the Investigation of Artificial Fill Soils

随着人们对建筑物功能需求的不断增加,既有建筑物加装电梯改造项目越来越多。以某既有建筑物加装电梯地基勘察项目为例,通过现场勘探和既有建筑物资料收集等手段,充分查明了场地工程地质条件,分析评价了人工填土的成分、工程特性及分布情况,提供了适宜的地基方案。既有建筑物周边的地基勘察应重点注意回填土空间分布的勘察,充分查明回填土成分、工程特性及分布情况;对可能存在的地下构筑物,应重点注意搜集既有建筑物以及相关周边建筑物的施工图资料。阐述了人工填土地基勘察中应重点注意的问题和适宜的地基方案,相关方法对以后类似工程有借鉴意义。

With the increasing demand of building functions,there are more and more projects for installing elevators in existing buildings.This paper presents a case history of an existing building with elevator foundation investigation project.The engi-neering geological conditions of the project site,the composition,engineering characteristics and distribution of the artificial fill are analyzed and evaluated.Feasible foundation options are provided by means of the field exploration and existing building data collection.The geotechnical investigation around the existing buildings should focus on the investigation of the spatial distribu-tion of backfill soil,and fully identify the composition,engineering characteristics and distribution of the backfill soils;For pos-sible underground structures,it is necessary to focus on the collecting construction drawings of existing buildings and relevant surrounding buildings.This paper describes the issues that are frequently encountered in the investigation of the artificial fill foundation and the appropriate foundation options.The relevant methods can be used for a reference in similar projects in the future.