建筑工程施工中深基坑支护技术

Technology of deep foundation pit support in construction engineering

分析了深基坑支护施工中存在的主要问题:土层开挖和边坡支护不配套,边坡修理达不到设计和规范要求,喷射混凝土厚度不够,强度达不到设计要求,设计与实际情况差异较大,工程监理不到位,施工监测不够重视。针对这些问题给出了深基坑支护施工中的主要技术,包括钢板桩支护技术、护坡桩支护技术、排桩支护技术、土钉支护技术、深层搅拌桩支护技术、强夯法、型钢支护施工技术。阐释了施工前的准备工作。应制定科学合理的方案,保证设备挖掘质量,做好周边防护工作。

This paper analyzes the main problems existing in the construction of deep foundation pit support.The soil excavation and slope support are not matched,the slope repair cannot meet the design and specification requirements,the shotcrete thickness is not enough,the strength cannot meet the design requirements,the design is quite different from the actual situation,the engineering supervision is not in place,and the construction monitoring is not paid enough attention to.In view of these problems,the main technologies in the construction of deep foundation pit support are put forward,including steel sheet pile support technology,slope protection pile support technology,row pile support technology,soil nail support technology,deep mixing pile support technology,dynamic compaction method and profile steel support construction technology.The application points of deep foundation pit support technology,such as the preparation before construction,the formulation of scientific and reasonable scheme,the guarantee of equipment excavation quality,and the surrounding protection work,are explained.