Study on Building Foundation Reinforcement in Collapsible Loess Area
SDDC construction method is widely used in collapsible loess area.When the site moisture content exceeds the optimal moisture content,the compaction coefficient of pile body,soil between piles and three pile centers by SDDC construction method cannot meet the design requirements.After being immersed by external water sources,it is easy to cause large settlement of building foundation and uneven settlement,and even cause serious safety and quality problems of construction projects.This paper takes a project in Xi'an as an example for analysis,when uneven settlement is caused by improper treatment of SDDC construction method,the building foundation needs to be strengthened,and the pit-jacked static pressure pile(steel pipe pile)treatment scheme is adopted.The monitoring results of settlement deformation after foundation reinforcement show that the maximum average settlement rate in the last 100 d is 0.01 mm/d,which meets the limit requirements of the current national code,and the foundation of the building is in a stable state.
collapsible loessSDDC construction methoddifferential settlementreinforcement treatmentpit-jacked static pressure pile
万方数据
维普
