开封玉皇阁整体顶升施工中单桩稳定性分析  

Stability Analysis of Single Pile in Integrally Lift-up Construction of Kaifeng Yuhuang Pavilion

作　　者：陈平[1] 刘凯 刘昆仑 尚例代 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]陕西省建筑科学研究院,陕西西安710082 [3]北京高能筑博建筑设计有限公司西安分公司,陕西西安710055

出　　处：《施工技术》2014年第17期18-20,共3页Construction Technology

摘　　要：在文物建筑的保护中,常需要将建筑物整体顶升,采用钢管静压桩技术是近几年的一大趋势。因钢管静压桩在顶升过程中需不断在桩顶加塞垫块,故单桩稳定性问题更为突出。以开封玉皇阁整体顶升设计为例,利用有限元软件ANSYS对钢管静压桩的单桩稳定性问题进行非线性分析。分析结果表明:桩顶临界屈曲荷载随桩顶自由长度的增加而减小,钢管桩的非线性影响因子随着钢管桩直径和壁厚的增加而减小。During the conservation project for ancient building, it is common to lift-up the building and the technology of steel pipe jacked pile is the main trend in recent years. The stability of the single pile is much more outstanding since it’ s necessary to add blocks at the top of the pile unceasingly during lift-up the steel pipe-jacked pile. Based on the process of the lift-up conservation project for Kaifeng Yuhuang Pavilion,using the finite element software of ANSYS makes nonlinear buckling analysis for the stability problem of single pile. Conclusion achieved are as follows：the critical buckling load decreases with the increase of the free length on the top of pile. The nonlinear effect factors decrease with the increase of diameter and wall thickness of steel pipe.

关 键 词：桩 顶升 稳定性 自由长度 有限元分析 

分 类 号：TU746.3[建筑科学—建筑技术科学]