导流与泄洪相结合的施工布置方法

Construction arrangement method combining flow guidance and flood discharge

Abstract

本发明公开了一种导流与泄洪相结合的施工布置方法,一、在上水库库尾冲沟位置修建副坝,副坝与库盆岸坡平顺连接;坝顶高程与主坝及环库公路一致;二、修建排水洞,兼做施工期的导流洞和上水库运行期的泄洪洞;排水洞采用城门洞型,洞身泄流能力采用明渠均匀流公式计算,按照冲沟内设计标准洪水的洪峰流量确定其断面尺寸;三、排水洞进水口采用侧槽式进水口结构,设置在副坝上游侧,侧槽式进水口朝着冲沟方向开设;侧槽式进水口的宽度、高度与所述排水洞的最大泄流能力相协调,并充分利用冲沟的沟底宽度;四、侧槽式进水口溢流堰堰顶高出冲沟的沟底天然地形3-5米,兼做挡碴坝。本发明优点为排水洞兼做施工期的导流洞和上水库运行期的泄洪洞,减少工程投资。
The invention discloses a construction arrangement method combining flow guidance and flood discharge. The construction arrangement method comprises a first step of building an auxiliary dam at the position of an upper reservoir tail gully, enabling the auxiliary dam to be in smooth connection with a reservoir basin bank slope, and enabling dam crest elevation to be consistent with a main dam and a reservoir surrounding road; a second step of building a draining hole which simultaneously serves as a flow guiding hole for a construction period and a flood discharge hole for an upper reservoir operating period; enabling the draining hole to be of a city gate opening type, adopting an open channel uniform flow formula to calculate flow discharging capability of the hole, and determining section dimensions of the hole according to flood peak discharge of a design standard in the gully; a third step of enabling a water inlet of the draining hole to be of a side channel type water inlet structure and be arranged on the upstream side of the auxiliary dam, enabling the side channel type water inlet to be towards the direction of the gully, enabling the width and the height of the side channel type water inlet to coordinate with the maximum flood discharge capability of the draining hole, and fully utilizing the bottom width of the gully; and a fourth step of enabling a weir crest of an overflow weir of the side channel type water inlet to be 3-5m higher than the natural terrain of the bottom of the gully, and enabling the overflow weir to simultaneously serve as a fragment blocking dam. The construction arrangement method has the advantage that the draining hole simultaneously serves as the flow guiding hole for the construction period and the flood discharge hole for the upper reservoir operating period and engineering investment is reduced.

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Patent Citations (1)

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