Box Foundation Work Character Analysis Of Loess Foundation

Relative to other forms of foundation, box foundation has big space stiffness,integrity and seismic performance is good, it can adjust the basal contact counterforceand uneven settlement, etc. Basal contact counterforce are the analysis of foundationsettlement and box foundation, the basis of the internal force calculation and internalforce calculation of box foundation is the foundation of box foundation structure design.Based on this, the paper box foundation in loess foundation is based on actual project,the following several aspects of research:（1）For existing of box foundation base contact reaction and internal forceanalysis methods are summarized, and compared different methods of calculationresults, it can be considered that the bar chain calculation and analysis method is closerto the actual situation.（2）Based on the measured data, the combination of different calculation method,are studied in loess foundation of box foundation base contact reaction force changingwith the construction and use process, box foundation in using stage under the action ofload, the basal contact counterforce are distributed in basic saddle.（3）By field tests and theoretical analysis, the stress of the box foundation areanalyzed, including the base stress of the reinforcing steel bar, whole bending of boxfoundation and local bending. Analyzed the measured results and the theoreticalcalculation of deviation and its reasons, and suggests that box foundation reinforcementstress is lesser, in flexible working state, the internal force is given priority to with localbending of box foundation, when design it can need not consider the effect of theoverall bending.