The expansion joints on both sides of dam block no. 26 exhibit an abnormal behavior after 12 years' operation.
黄坛口大坝26号坝段二侧伸缩缝在蓄水运行多年后发生异常变形。
22 dam block as a typical object, a stress recheck was conducted to demonstrate the current safety of the pre-stressed pier using a 3-d finite element method.
为论证当前预应力闸墩的安全性，选取22号坝段预应力混凝土闸墩作为典型对象，采用三维有限元计算方法进行应力复核计算。
And base on the experiment, calculating formula of cross section mean velocity's reduction after planting and bed shears stress of vegetation dam block are established.
同时在试验的基础上，推导得植树后断面平均流速减小值和植物坝段床面剪应力的计算公式。
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