基于测斜数据的深基坑支护结构曲率和弯矩分析  

Analysis on Curvature and Bending Moments of Deep Foundation Excavation Supporting Structure Based on Inclinometer Data

作　　者：池秀文[1] 付涛[1] 潘杰麟[1] 林驰 汪淑平 蔡光煌 

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]武汉城市投资开发集团有限公司,湖北武汉430050 [3]武汉市政建设集团机械化公司,湖北武汉430012

出　　处：《施工技术（下半月）》2011年第6期38-40,共3页Construction Technology

基　　金：湖北省建设科技计划项目(K200620)

摘　　要：在深基坑开挖过程中,支护挡墙的弯矩一般通过测斜数据估算曲率后计算得到,基本思想是利用曲线拟合测斜数据,再对拟合曲线进行二次求导得到曲率。虽然有许多方法可以拟合测斜曲线估算曲率,但缺乏一致标准。主要结合武汉阅马场交通综合整治工程,采用分段三次曲线拟合五点的方法对实际工程中测得的较典型的位移曲线进行拟合并估算曲率,对支护桩曲率和弯矩进行计算分析。Bending moments in excavation supporting walls of deep foundations are frequently estimated using curvature derived from inclinometer surveys.The basic idea involves fitting a curve or a series of curves to the inclinometer data.Then the curvature is estimated as the second difference of the displacement profile.Although many methods are available to estimate curvature,there is a lack of a consistent standard in deducing curvature from inclinometer readings.Based on the traffic treatment project of Yuemachang in Wuhan,authors adopt the method of piecewise cubic curve fitting to five points on the typical displacement diagrams in the real project and estimate their curvatures to calculate and analyze the curvature and bending moments of the supporting piles.

关 键 词：深基坑 支护结构 分段三次曲线拟合 曲率 弯矩 

分 类 号：TU433[建筑科学—岩土工程]