软基输泄水塔结构分析

Structural analysis on water conveyance-discharge tower on soft foundation

结合某水库工程实例,分析了大型软基输泄水塔的稳定性。根据CAD设计资料建立了输泄水塔三维实体模型,并针对软基,塔体采取地下嵌固形式以及楔形塔体的设计。考虑截面多处突变、部分嵌固在地下岩体内以及锁扣板等特点,分别对输泄水塔在完建工况、正常蓄水位、正常蓄水位下检修、正常蓄水位下发生地震这四种工况的整体抗滑、抗倾覆、抗浮稳定以及塔底地基的承载力进行了验算分析。计算结果表明,按照目前的设计,该输泄水塔的地基承载力和整体稳定性均满足规范要求,其体型设计可为类似工程提供参考。

Based on an actual engineering case,the stability of a large water conveyance-discharge tower on soft foundation is analyzed herein.In accordance with the CAD design data,a 3D entity model of the water conveyance-discharge tower is established,and then the design of the underground-embedded and wedged tower structure is adopted for the tower body for the soft foundation.Under the consideration of the characteristics such as several mutations on the section,a part of it is embedded into the underground rock body,locking plate,etc.,the checking calculation and analysis are made on the anti-sliding,anti-overturning and anti-floating stabilities of the integral structure as well as the foundation bearing capacity of the tower under the four operation conditions of the tower,i.e.the working condition of completion,the operation under the normal water level,the maintenance under the normal water level and the occurrence of earthquake under the normal water level.The calculation results show that both the foundation bearing capacity and the integral stability of the water conveyance-discharge tower can meet the requirements of the relevant specifications in accordance with the current design,and then its shape design can provide a reference for the similar project concerned.