论文部分内容阅读
为研究悬臂式围护桩结构的受力性状和土压力分布特点,结合西宁火车站改造工程,对该深基坑支护结构在不同开挖工况条件下,悬臂桩的受力性状与内力传递特征进行动态的现场试验。试验结果表明:悬臂桩的受力特征与理论值有所差异,在实际设计中,可对其在配筋方式、混凝土设计、嵌固段长度等方面进行优化,实测土压力小于朗肯土压力,与经典土压力理论有显著区别。该试验结果可以有效优化桩身设计,为软岩基坑支护结构在开挖过程中的受力及变形提供理参考性依据。
In order to study the characteristics of the mechanical behavior and earth pressure of the cantilever type retaining pile structure, combined with the reconstruction project of Xining Railway Station, the mechanical properties and internal forces of the cantilever pile under different excavation conditions Pass features for dynamic field trials. The test results show that the stress characteristics of cantilever pile are different from the theoretical values. In the actual design, the optimized design of the cantilever pile, the concrete design and the length of the embedded section can be optimized. The measured soil pressure is less than the Rankine soil pressure , With the classic theory of earth pressure are significantly different. The test results can effectively optimize the design of pile body and provide reference for the stress and deformation of soft rock foundation pit supporting structure during excavation.