Deformation and earth pressure of a double-row piles retaining structure for deep excavation
Deformation and earth pressure of a double-row piles retaining structure for deep excavation
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作者：
Wu Gang
基于某深基坑工程的大量现场实测数据，研究了双排桩支护结构的弯矩、变形特性及土压力分布规律。分析了深基坑开挖的空间效应、盖梁对土压力的影响、支护结构变形与土压力分布的关系以及支护结构与土体的作用机理。研究表明，双排桩支护结构上的土压力分布是十分复杂的，与经典的朗肯或库仑土压力理论计算结果不同，为双排桩支护结构的设计模型提供了依据。
Based on a large number of measured data for a deep excavation in-situ, the corresponding bending moments, deformation characteristics and the earth pressure distribution of a double-row piles retaining structure are studied. Some problems are analyzed, including the space effect of deep excavation, the effect of cap beam on earth pressure, the relationship between retaining structure deformation and the earth pressure distribution, and the mechanism of action between retaining structure and soil. The studies show that the earth pressure distributions on the double-row piles retaining structure are quite complicated, and are different from those obtained by the classical Rankine’s or Coulomb’s earth pressure theory, which supply a basis for the design model of double-row piles retaining structure.