土工基础

›› 2015, Vol. 29 ›› Issue (2): 64-66.

• 工程实录 • 上一篇    下一篇

提高坑底抗隆起稳定性的方法探讨

孙亚飞   

  1. （中铁大桥勘测设计院集团有限公司，武汉 430050）
  • 收稿日期:2014-04-01 出版日期:2015-04-20 发布日期:2015-05-04
  • 作者简介:孙亚飞(1982-)，男，岩土工程硕士，工程师，研究方向为地铁车站的基坑和主体结构设计工作。

The Discussion about Improve the Heave Stability Checking of Foundation Excavation

SUN Yafei   

  1. （China Railway Major Bridge Reconnaissance & Design Institute Co., Ltd., Wuhan 430050）
  • Received:2014-04-01 Online:2015-04-20 Published:2015-05-04

摘要： 为了比较新规程、天津规程和上海规程在基坑抗隆起计算方法的差异，深入的研究了三本规程采用抗隆起计算模式，指出其异同点，并针对抗隆起计算模式的特点给出了提高抗隆起稳定性的对策。针对Prandtl公式的坑底抗隆起稳定性验算，给出了坑内土体采用裙边加固的宽度和加固深度，以供抗隆起稳定性验算参考和借鉴。

关键词: 抗隆起稳定性验算, 圆弧滑动模式, Prandtl公式, Skempton公式

Abstract: This paper presents the comparative results calculated from the bottom heave calculations in the New National Building Design Specifications, Tianjin City Design Specifications and the Shanghai City Design Specifications. Factors that both considered in three different codes are analyzed and the bottom heave prevention measures are also presented. In a deep excavation site, both the width and the depth of the soil that requires to be improved are presented in accordance with the Prandtl formula.

Key words: Bottom Heave Checking, Circular Slip Mode, Prandtl Formula, Skempton Formula