洛阳隋唐城应天门遗址保护建筑基础拉杆设计

Foundation tie rod design of the conservation building of YingTianMen archaeological site of Luoyang City of Sui and Tang Dynasties

隋唐城应天门遗址保护建筑采用桩基础,桩顶设置承台支撑上部斜柱框架。在不能开挖遗址的情况下,采用暗挖顶管工艺施工基础预应力拉杆,平衡基础间水平推力。先后介绍了预应力拉杆的组成、预应力张拉次数、预应力张拉比例和顺序、桩顶水平位移控制目标等设计原则,以及预应力拉杆的施工方案及施工控制方法,并根据施工监测结果及施工模拟结果对施工方案进行了调整。结果表明:施工过程中桩顶水平位移均满足既定目标,且变化趋势与施工模拟结果吻合。

Pile foundation was used in the conservation building of YingTianMen archaeological site of Luoyang City of Sui and Tang Dynasties.The pile cap was set to support the upper inclined column frame.As the site could not be excavated,the prestressed tie rod between foundations was constructed by underground excavation and pipe jacking technology to balance the horizontal thrust between foundations.The composition of the prestressed tie rod were introduced,the number of prestressed tension,the proportion and sequence of prestressed tension,the horizontal displacement control target of pile top and other design principles were introduced successively,as well as the construction scheme and construction control method of the prestressed tie rod were introduced.According to the comparison of construction monitoring and construction simulation results,the construction scheme was adjusted.The results show that the horizontal displacement of pile top meets the established target during construction,and the variation trend is consistent with the construction simulation results.