疏排桩-土钉墙组合支护结构的疏排桩计算模型  

Computational model for scattered row plies of composite retaining structure with scattered row plies and soil nailing wall

作　　者：刘斌[1,2] 杨敏[2] 

机构地区：[1]中国电力工程顾问集团华东电力设计院,上海200063 [2]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《土木工程学报》2012年第11期159-165,共7页China Civil Engineering Journal

基　　金：国家自然科学基金(40972179)

摘　　要：疏排桩-土钉墙组合支护结构的疏排桩计算模型以弹性支点m法为基础,通过假设疏排桩间土拱轴线为半圆形,推导疏排桩和土钉墙的荷载分担计算公式,并对土拱荷载传递比进行分析。简化土钉墙面层后土压力为均布荷载,推导土钉墙对疏排桩的支护刚度计算公式,并对支护刚度取值范围进行计算。进行参数分析,并通过与试验比较,对模型的合理性进行验证。A computational model for scattered row plies of composite retaining structure with scattered plies and soil nailing is presented based on the elastic m-method of a beam on Winkler foundation. According to the assumption of a semi-circle for soil arch axis, the formulas of the load sharing between scattered row plies and soil nailing are derived, and the load transfer ratio of soil arch is analyzed. By simplifying the earth pressure behind the surface layer of soil nailing wall as uniform, a formula is derived for the supporting stiffness of soil nailing wall, and the range of supporting stiffness of soil nailing wall is computed. Based on the parametric study and the comparison with the test data performed, the computational model is verified.

关 键 词：深基坑 疏排桩 土钉墙 土拱效应 

分 类 号：TU476[建筑科学—结构工程]