深基坑桩锚支护结构变形和内力分析方法探讨
|
摘要
利用弹性地基梁法和有限差分法,分别计算桩锚支护体系在深基坑开挖过程中支护结构的变形和内力,并与实测数据对比分析后发现:两种设计分析模型由于选型差异和对实际桩土作用模拟的情况不同,分析结果与实测结果间存在程度不同的差异,其中弹性地基梁法在支护结构水平位移分析中误差较大,在以强度控制为主的设计情况下使用较妥;有限差分法能更真实地反映桩锚支护结构在深基坑开挖过程中土体与支护结构的变形及内力变化,但计算模型复杂。
We have calculated the deformation and inner forces of the pile-anchor structure based on the model of beam on elastic and finite difference method respectively.By comparing the calculated results with the measured values,two analytic models show dramatic discrepancy from the real values due to the selection and the simulation of the soil-pile action.The error of the model of beam on elastic is obvious as it is use in analysis of horizontal displacement of the supporting structure,which is thus suitable for assessment of the designs mainly controlled by strength.The finite difference method can reflect the change of the deformation and inner forces of the pile-anchor structure of deep excavation,although its calculation model is complicated.
We have calculated the deformation and inner forces of the pile-anchor structure based on the model of beam on elastic and finite difference method respectively.By comparing the calculated results with the measured values,two analytic models show dramatic discrepancy from the real values due to the selection and the simulation of the soil-pile action.The error of the model of beam on elastic is obvious as it is use in analysis of horizontal displacement of the supporting structure,which is thus suitable for assessment of the designs mainly controlled by strength.The finite difference method can reflect the change of the deformation and inner forces of the pile-anchor structure of deep excavation,although its calculation model is complicated.
引文
[1]龚晓南,高有潮.深基坑工程设计施工手册[M].北京:中国建筑工业出版社,1998:513-597.
[2]中华人民共和国建设部.GBJ50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.
[3]中国建筑科学研究院.JGJ94—94建筑桩基技术规范[S].北京:中国建筑工业出版社,1994.
[4]中国建筑科学研究院.JGJ120—99建筑基坑支护技术规程[S].北京:中国建筑工业出版社,1999.
[5]刘波,韩彦辉.FLAC原理、实例与应用指南[M].北京:人民交通出版社,2005.
[6]刘建航,侯学渊.基坑工程手册[M].北京:中国建筑工业出版社,1997:139-231.
[7]秦四清,万林海,汤天鹏,等.深基坑工程优化设计[M].北京:地震出版社,1998:79-100.
[2]中华人民共和国建设部.GBJ50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.
[3]中国建筑科学研究院.JGJ94—94建筑桩基技术规范[S].北京:中国建筑工业出版社,1994.
[4]中国建筑科学研究院.JGJ120—99建筑基坑支护技术规程[S].北京:中国建筑工业出版社,1999.
[5]刘波,韩彦辉.FLAC原理、实例与应用指南[M].北京:人民交通出版社,2005.
[6]刘建航,侯学渊.基坑工程手册[M].北京:中国建筑工业出版社,1997:139-231.
[7]秦四清,万林海,汤天鹏,等.深基坑工程优化设计[M].北京:地震出版社,1998:79-100.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心