水利科技与经济
水利科技與經濟
수리과기여경제
2014年
9期
71-73
,共3页
反拱水垫塘%动水压强%流速%消能
反拱水墊塘%動水壓彊%流速%消能
반공수점당%동수압강%류속%소능
anti arch plunge%hydrodynamic pressure%velocity%energy dissipation
反拱底板水垫塘是一种新型的水垫塘型式，是一个倒拱形壳体结构。它是根据峡谷天然河道的形状，将水垫塘设计成中间低、两岸高的拱形体型，不同程度地利用拱的作用来抵抗巨大的动水压力，提高防护结构的安全性。随着反拱水垫塘的广泛应用，关于反拱水垫塘的水流场研究越来越受到重视。针对已建成的拉西瓦水电站的反拱水垫塘，根据重力相似准则，选择合适比尺1∶130，设计了反拱水垫塘水力学物理模型，模拟工况为设计水头7.69 cm，测量了在此工况下的反拱水垫塘各测点压强和流速值。通过对实验数据的处理得到原型反拱水垫塘的压强和速度值，实现了对高水头和大流量作用下反拱水垫塘底板动水压强及流速的试验研究，得出底板动水压强及流速沿流程以及沿拱圈横向的分布规律。
反拱底闆水墊塘是一種新型的水墊塘型式，是一箇倒拱形殼體結構。它是根據峽穀天然河道的形狀，將水墊塘設計成中間低、兩岸高的拱形體型，不同程度地利用拱的作用來牴抗巨大的動水壓力，提高防護結構的安全性。隨著反拱水墊塘的廣汎應用，關于反拱水墊塘的水流場研究越來越受到重視。針對已建成的拉西瓦水電站的反拱水墊塘，根據重力相似準則，選擇閤適比呎1∶130，設計瞭反拱水墊塘水力學物理模型，模擬工況為設計水頭7.69 cm，測量瞭在此工況下的反拱水墊塘各測點壓彊和流速值。通過對實驗數據的處理得到原型反拱水墊塘的壓彊和速度值，實現瞭對高水頭和大流量作用下反拱水墊塘底闆動水壓彊及流速的試驗研究，得齣底闆動水壓彊及流速沿流程以及沿拱圈橫嚮的分佈規律。
반공저판수점당시일충신형적수점당형식，시일개도공형각체결구。타시근거협곡천연하도적형상，장수점당설계성중간저、량안고적공형체형，불동정도지이용공적작용래저항거대적동수압력，제고방호결구적안전성。수착반공수점당적엄범응용，관우반공수점당적수류장연구월래월수도중시。침대이건성적랍서와수전참적반공수점당，근거중력상사준칙，선택합괄비척1∶130，설계료반공수점당수역학물리모형，모의공황위설계수두7.69 cm，측량료재차공황하적반공수점당각측점압강화류속치。통과대실험수거적처리득도원형반공수점당적압강화속도치，실현료대고수두화대류량작용하반공수점당저판동수압강급류속적시험연구，득출저판동수압강급류속연류정이급연공권횡향적분포규률。
The counter-arch ledger wall water cushion pond is one kind of new water cushion pond pattern, it is a but actually arch shell structure.According to the canyon natural river course′s shape, it designs the water cushion pond among low, both banks high arch build, its varying degree use arches the function resists the huge hydrodynamic pressure, enhances the safeguard structure the security.A-long with the counter-arch water cushion pond′s widespread application, receives more and more a-bout the counter-arch water cushion pond′s water flow field′s research takes seriously.This article in view of already the Laxiwa hydroelectric power station counter-arch water cushion pond which com-pletes, according to the gravity similarity criterion, the choice compared to the ruler 1:130, has de-signed the counter-arch water cushion pond hydraulics physical model appropriately, it simulates the operating mode for design head 7.69cm, has surveyed under this operating mode counter-arch water cushion pond various measuring points intensity of pressure and the speed of flow value, this article through obtains the prototype counter -arch water cushion pond intensity of pressure and the speed val-ue to empirical datum processing, and has realized the counter-arch water cushion pond ledger wall hydrodynamic pressure is strong to under the high flood peak and the great current capacity functionand the speed of flow experimental study, obtains the ledger wall hydrodynamic pressure to be strong finallyand speed of flow along flow as well as along arch ring crosswise distributed rule.
