土工基础

›› 2014, Vol. 28 ›› Issue (4): 22-26.

• 工程实录 • 上一篇    下一篇

某改扩建工程的桩基础分析

郭红梅   

  1. （北京城建勘测设计研究院有限责任公司，北京 100101）
  • 收稿日期:2013-06-30 出版日期:2014-08-20 发布日期:2014-08-27
  • 作者简介:郭红梅（1972-），女，博士，高级工程师，研究方向为岩土工程勘察研究及岩土工程设计。

Analysis of Pile Foundations in a Large Rehabilitation and Expansion Project

GUO Hongmei   

  1. （Beijing Urban Construction Exploration & Design Research Institute Co., Ltd, Beijing 100101）
  • Received:2013-06-30 Online:2014-08-20 Published:2014-08-27

摘要： 以某荷载分布严重不均匀及对基础变形控制要求十分严格的大型桩基础结构物的改扩建工程为例，对采用桩底桩侧后压浆技术，提高钻孔灌注桩的单桩承载力与单桩刚度的方法进行分析评价，同时通过联合上部结构-地基-桩基础协同作用沉降分析，采用变刚度调平设计来减少差异沉降并进行基础优化设计,可供同类工程借鉴。

关键词: 桩基础, 后压浆技术, 协同作用分析, 变刚度调平设计, 基础优化设计

Abstract: Structures in a rehabilitation and expansion project are pile supported and have a very strict total and differential settlement requirement on the foundations. The structures have large dimension and are not uniformly loaded. It is concluded that the post grout below the pile tips and at pile sides can improvement axial capacity and the stiffness of the castinplace reinforced concrete piles. The total and differential settlement reductions are achieved by the analysis the interactions among the supper structures, foundation soil and piles, and by using variable rigidity adjustment design. The pile foundation design is also optimized.

Key words: Pile Foundations, Post Grout, SoilStructure Interaction Analysis, Variable Rigidity Adjustment Design, Foundation Optimization