摘要
作业平台作为临时支撑,安全是深水钢管桩支撑平台最重要的控制点。本文联系蚌埠市长淮卫淮河大桥深水基础工程,应用有限元软件对钢围堰拼装平台进行三维建模;对首节钢围堰拼装平台、中层吊装平台,以及悬吊平台的结构稳定性实行了计算。计算结果为各结构应力及位移均满足设计要求,验证了钢围堰拼装平台的安全与合理性。同时建立了与钢围堰相连的下部分配梁、与精轧螺纹钢相连的上部分配梁有限元模型;计算得出上、下部分配梁的各结构应力及位移均满足设计要求,证明配梁结构的稳定符合要求。该研究成果积累了部分深水基础施工经验,对今后跨越大江大河、海湾湖区钢围堰拼装平台施工提供了重要的指导作用。
Construction platform acts as a temporary structure, its safety is the most important control point of the deepwater steel pipe pile support platform. In this paper a three-dimensional modeling of the steel cofferdam assembled platform is established by using the finite element software to solve the deepwater foundation engineering of Huaihe River Bridge in Bengbu Changhuaiwei; the stability of steel cofferdam assembled platform, medium lift platform and suspension platform are calculated. The results show that the stress and displacement of each structure meet the design requirements, and the safety and rationality of the steel cofferdam assembled platform is verified. At the same time, the finite element models of the lower distribution beam connected with the steel cofferdam and the upper distribution beam connected with the finish rolling steel are established; the structural stress and displacement of the upper and lower part of the beam are calculated to meet the design requirements, which proves that the stability of the beam structure meets the requirements. The research results have accumulated some experience in the construction of deepwater foundation, which will provide an important guiding role for the construction of deep water bridge across the river and the bay lake area.
基金
国家自然科学基金(51179095)
关键词
深水基础
施工平台
有限元
结构计算
deepwater foundation
construction platform
finite element
structure calculation
