土工基础

›› 2016, Vol. 30 ›› Issue (1): 77-82.

• 工程实录 • 上一篇    下一篇

复合式重力坝支护结构的两阶段附加弯矩法

刘尊景1,3，陈坤校2，陆金弟2，杨 敏1，姚 函2   

  1. （1.同济大学地下建筑与工程系，上海 200092；2.浙江舜杰建筑集团股份有限公司，上海 200060；3.中国电建集团华东勘测设计研究院有限公司，杭州 311122）
  • 收稿日期:2015-05-27 出版日期:2016-02-20 发布日期:2016-03-02
  • 作者简介:刘尊景 (1986-)，男，助理工程师，硕士，注册岩土工程师，研究方向为基坑支护、边坡和地基处理设计等。

Deformation Prediction Method of Composite Gravity Retaining Wall in Two Steps

LIU Zunjing1,3，CHEN Kunxiao2，LU Jindi2，YANG Min1，YAO Han2   

  1. （1.Department of Geotechnical Engineering, Tongji University, Shanghai 200092；
    2.Zhejiang Shunjie Construction Crop, shanghai 200000；
    3.Powerchina Huadong Engineering Corporation Limited，Hangzhou 311122，China）
  • Received:2015-05-27 Online:2016-02-20 Published:2016-03-02

摘要： 复合式重力坝基坑支护结构是介于重力式水泥土坝和排桩两种围护形式之间的一种复合支护形式。由于这种复合支护结构内部受力关系复杂，除有限元法外尚未有较好的变形计算方法。在弹性支点法的基础上，提出了一种考虑空间效应的两阶段迭代计算方法。该方法第一阶段按常规弹性支点法计算，第二阶段在第一阶段得到的变形曲线基础上，将内插加筋体摩擦力产生的附加弯矩叠加到围护体的受力与变形计算中。最后结合工程实例的实测结果对该方法进行了对比验证。

关键词: 复合式重力坝, 基坑支护, 空间效应, 两阶段法

Abstract: Composite gravity retaining wall is one type of excavation support structure that in between gravity retaining wall and piled supporting structure. Since the complicated relationship of this internal structure of the retaining wall, there has not been an appropriate deformation estimation method other than the finite element method. Based on the elastic Winkler model, this paper proposes a twostep iterative calculation method considering its spatial effects. The first step of the calculation is a conventional method in accordance with the Winkler model, the second step is to superpose an additional moment generated by friction of interpolated reinforcement structure to the grid point on the Winkler beam, using the deformation curve obtained by the first step. Through an engineering example, the method is validated.  

Key words: Composite Gravity Dam, Deep Excavation Support, Spatial Effects, TwoStep Method