岩土力学2012，Vol.33Issue(7)：2167-2173,7.
PSI和CRI联合算法用于苏通大桥基础沉降监测
PSI and CRI joint algorithm used to monitor settlements of Sutong bridge foundation
张宁宁 1陈志坚 2陈元俊 2边磊3
作者信息
- 1. 华电电力科学研究院,杭州 310030
- 2. 河海大学 地球科学与工程学院,南京 210098
- 3. 福建省建江水利水电咨询有限公司,福州350001
- 折叠
摘要
Abstract
Settlement is the key point for safety monitoring of super-large pile group foundation built on thick bed overburden. According to the question existing in the settlement monitoring of pile group foundation in Sutong bridge, PSI (permanent scatterers interferometry) and CRI (corner reflectors interferometry) technologies are synthetically applied to the settlement monitoring for Sutong bridge foundation. Combining with the permanent scatterers characteristics of the bridge and corner reflectors set up in the key monitoring site at bridge region, by processing 20 scenes SLC (signal look complex) data of Envisat acquired in the construction period from 2003 to 2008, differential interferometry is analyzed by CTM module in EV-InSAR software. The permanent scatterers points in the bridge area are picked out and the deformations of the points in different construction periods are calculated by PSI and CRI joint algorithm. It reflects the settlement of Sutong bridge foundation in the construction process objectively and roundly. Comparing settlement values gained by PSI with finite element calculation, the relative error is 4.64%. The result indicates that PSI and CRI joint algorithm is a powerful technology to monitor the foundation settlement of huge bridge's foundation. Along with continuous accumulation of SAR (synthetic aperture radar) data in the monitoring area, high-precision settlements of Sutong bridge foundation in operation period will be gradually obtained.关键词
群桩基础/沉降监测/PSI和CRI联合算法/有限元分析Key words
pile group foundation/ settlement observation/ PSI and CRI joint algorithm/ finite element analysis分类
天文与地球科学引用本文复制引用
张宁宁,陈志坚,陈元俊,边磊..PSI和CRI联合算法用于苏通大桥基础沉降监测[J].岩土力学,2012,33(7):2167-2173,7.
