土工基础

›› 2016, Vol. 30 ›› Issue (2): 227-231.

• 工程实录 • 上一篇    下一篇

皖北地区多元互层地基附加应力扩散规律与承载特性研究

李锦鸽1，余 飞2，李 剑2   

  1. （1.中铁一局集团有限公司，西安 710054；2.中国科学院武汉岩土力学研究所，武汉 430071）
  • 收稿日期:2016-02-25 出版日期:2016-04-20 发布日期:2016-04-27
  • 作者简介:李锦鸽（1976-），女，工程师，研究方向为铁路路基工程管理。

Incremental Stress Spreading in the Multi Soil Strata with Different Stiffness in Norther Anhui Soils

LI Jinge1, YU Fei2， LI Jian2   

  1. (1. China Railway First Group Co. Ltd., Xian 710054； 2.State Key Laboratory of Geomechanics and 
    Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071)
  • Received:2016-02-25 Online:2016-04-20 Published:2016-04-27

摘要： 地基承载力不足常导致公路小型构造物发生病害，威胁公路的安全通行，皖北地区互层地基广泛分布，传统的地基承载力确定方法不适用于皖北地区复杂和不确定的多元互层地基。针对皖北地区典型的互层地基地质特征，主要研究含薄弱夹层的多元互层地基的附加应力扩散规律和承载力特性，并考虑夹层土体厚度、基础宽度等对其的影响规律，讨论多层互层地基承载力的主要影响因素，评价其影响范围，使得工程实践中对多层互层地基承载力检测与评价更迅速、合理。

关键词: 互层地基, 承载特性, 附加应力, 扩散规律

Abstract: Small highway structures often distressed due to the insufficient bearing capacity in the foundations. The distressed structures might be a potential hazard for the safe operation of the highway. In northern Anhui, alternating of soil strata with significant different stiffness are widely deposited. The conventional bearing capacity evaluation method might not applicable to these stiffness alternating soil strata. This paper presents the evaluation results of the incremental stress spreading in the multi soil layers. The influence of the thickness of the target soils and the width of the foundation on the bearing capacity of the foundation is discussed. The fast and reliable evaluation of the foundation bearing capacity in the multi soil strata with stiffness alternations.\=

Key words: Multi Soil Strat Foundations, Bearing Capacities, Incremental Stress, Stress Spreading