挖孔桩的传力机理和设计指标的若干问题讨论

Argumentation About Several Issues Pertaining To Forec Transmiasion Mechanism And Design Indexes of Excavation Pit pile

通过在人工挖孔桩桩底埋设土压力盒和桩身埋设应变实测成果，讨论侧阻力和端阻力随沉降的增长的变化趋势。探讨侧阻的“峰值”和“残余值”的区别和极限侧阻的定义、端阻的潜力，并对挖孔桩设计的一些问题提出建议。

Based on the tes results obinined by burying soil peare test box beveath the bottom and strain meter inside the body of the manual excavation pit piles, thes article attempts to expound the variation tendancy of laterel resistance and end resistane in pace with the incare of settlemetn. the difference between 'peak value'and 'residue value'of the lateral resistance is also disussed. Moreover, definition of ultimate lateral resistance and potential of end resistance are expouded, thus some suggesons are put forward about the design of the excavation pit piles by this author.