Abstract:

In order to study the application effect of long and short pile support in soft soil areas，this

article takes typical soft soil foundation pit long and short pile support schemes as the research object，ana⁃

lyzes the feasibility of long and short pile support in this project through geological characteristics and design

points，and analyzes the stress characteristics of long and short piles during the excavation process of foun⁃

dation pits using monitoring data and actual stress conditions of support piles. Research has shown that un⁃

der the conditions of soft soil clay soft soil strata，the long and short pile support method ensures the safety

and stability of the foundation pit. Through on-site monitoring，it can be concluded that long piles bear more

bending moments and mainly play a role in embedding and anti overturning，while short piles and short

piles together bear the role of retaining soil and transmitting soil pressure. The research results can provide

guidance for the support of soft soil foundation pits in similar strata.

Key words:

soft soil foundation pit, long and short pile support, monitoring analysis, stress mode