摘要
钢板桩围堰的施工,根据水深不同可采用顺作法或逆作法施工,顺作法在设计内支撑位置时普遍未考虑钢板桩的最优受力状态;逆作法施工普遍采用内支撑整体下放的方式,施工质量不高且无法保证钢板桩的垂直度。为解决这2种工序存在的问题,提出了2种优化施工方案,即优化内支撑层间间距和顺逆作混合法施工工序,并采用Midas进行有限元建模及受力分析,分析结果表明:2种优化方案均可显著减小围堰的受力变形,提高工程的安全性与经济性。相比于顺作法施工,数值结果显示逆作法和混合法都可减少钢板桩变形,改善结构应力。混合法施工模拟结果显示钢板桩变形与逆作法施工结果相当,但其施工难度低,保证工程质量的同时,还可以扩大其适用范围。
The steel plate pile cofferdam can be constructed by top down construction method and bottom up construction method according to the different depth of water.The optimal stress state of the steel plate pile is generally neglected when using the bottom-up construction method for designing the internal support position.While the construction quality is not high and the verticality of the steel plate pile cannot be guaranteed when use top-down construction method.In order to solve the problems existing in these two methods,optimizing the layer spacing of the internal support layer and mixed construction method are proposed in this paper.Based on the finite element modeling of MIDAS,the calculation results of the deformation and the stress of cofferdam can be significantly reduced.Compared with the bottom-up construction method,the results show that the deformation of steel plate piles and the structural stress are reduced by using top down construction method and mixed construction method.The mixed construction method simulation results show that the deformation of the steel plate pile is equivalent to the construction results of the top-down construction method,but its construction is more convenient,and the quality of the project can also expand its scope of applica tions.
作者
李金成
张谢东
郭细伟
李红
LI Jin-cheng;ZHANG Xie-dong;GUO Xi-wei;LI Hong(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China;China First Highway Engineering Co Ltd,Beijing 100024,China)
出处
《武汉理工大学学报》
CAS
2023年第12期97-106,共10页
Journal of Wuhan University of Technology
基金
山西交通控股集团科技项目(19-JKKJ-8)
关键词
顺逆作混合法施工
钢板桩围堰
最优受力状态
应力与变形
mixed construction method
steel sheet pile cofferdam
optimal stress state
stress and deformation
