土工基础

›› 2015, Vol. 29 ›› Issue (3): 105-109.

• 工程实录 • 上一篇    下一篇

排水固结法极限状态设计方法研究

黄福海   

  1. （中铁第四勘察设计院集团有限公司，武汉 430063）
  • 收稿日期:2015-04-07 出版日期:2015-06-20 发布日期:2015-06-26
  • 作者简介:黄福海（1982-），男，工程师，主要研究方向为铁路勘察设计工作。
  • 基金资助:

    基金项目：铁道部科技研究开发计划重点课题（2012G014-H）

Limiting State Design of the Soil Improvement Method by Horizontal Drainage

HUANG Fuhai   

  1. (China Railway Siyuan Survey and Design Group Co. Ltd., Wuhan, 430063）
  • Received:2015-04-07 Online:2015-06-20 Published:2015-06-26

摘要： 在分析了排水固结法的设计参数的基础上建立了极限状态方程，通过典型算例及既有工点校准计算找出目前规范隐含的可靠指标，确定了各随机变量的分项系数；结合既有规范确定了路基结构重要性系数及路基稳定调整系数；根据既有工程经验提出了工法调整系数；建立了排水固结法极限状态设计表达式。最后对新长铁路及广珠铁路等软土加固地基，对比分析了总安全系数法与分项系数的极限状态设计法的结果，表明本文提出的极限状态设计方法与目前规范采用的方法设计水准是一致的。

关键词: 排水固结法, 极限状态设计方法, 分项系数

Abstract: The limiting state equations are established based on the consolidation design parameters that are calibrated with the monitoring data from the case histories. The equivalent reliability indices of the variables in the current design code are identified. The structure importance factor and the resistance factor for the embankment stability are adjusted based on the reliability theory on the soil improvement projects. The limiting state design approach of the horizontal drainage method is established. In the paper, the soil improvement design for the case histories of XinChang and GuangZhu railway projects are compared with both conventional and limiting state approaches. The results indicate that both methods yield similar results.

Key words: Horizontal Drainage Method, Limiting State Design Method, Itemized Factors.