排桩支护内力试验研究

通过对邯郸某深基坑桩锚式支护结构桩身内力的计算与现场实测,研究分析了深基坑开挖过程中桩身钢筋应力及弯矩的分布和变化规律.在开挖过程中,桩身内力随开挖深度的增大而增加.桩身钢筋应力与基坑的暴露时间、桩体位移及预应力锚杆的施加等因素有关.在桩身内力实测结果和理论计算结果对比分析的基础上,得出在桩锚支护设计中使用弹性法比经典法更加合理,从而为桩锚支护结构设计提供了依据.

Research on the internal force of pile pier retaining structure

Based on filed measured date and calculated result about the internal force of the anchor piles retaining structure in Handan,the reinforcement stresses and moments of the piles along with the excavation of the deep pit are studied in this paper.Internal force of the pile body increase with the depth of foundation ditch during the excavation.The reinforcement stresses is heavily associated with the exposure time,the pile body displacement and applying of the pre-stress anchorage.The elastic method is more s...