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扬压力是宽缝重力坝设计中的基本荷载之一。扬压力包括浮托力和渗透压力二部分。在浮托力作用下,由于坝体正应力与荷载图形完全一致,计算极为简便,故不予赘述。在渗透压力作用下,问题就比较复杂,对宽缝重力坝来说,目前尚未见有一套完整的应力计算公式。本文根据重力法的基本假定,推导了在几种习用渗透压力图形作用下的各项应力计算公式,以供读者在设计中参考应用。
The uplift pressure is one of the basic loads in the design of wide-gap gravity dam. Yang pressure includes floating force and osmotic pressure in two parts. Under the action of floating force, the normal stress of the dam body is exactly the same as the load figure, so the calculation is very simple and will not be repeated here. Under osmotic pressure, the problem is more complex. For the wide-gap gravity dam, a complete set of stress calculation formulas have not yet been found yet. Based on the basic assumption of gravity method, this paper derives various stress calculation formulas under the influence of several conventional osmotic pressure patterns for readers’ reference in the design.