CAJ | 학술논문

基于淤泥颗粒在水中的受力情况和管道射流基本理论,建立了适用于堆场淤泥颗粒的基本运动方程,得到了淤泥颗粒的沉降速度分布图、水平管道射流各断面上的速度分布图和不同断面处轴向速度分布图.通过拟合淤泥颗粒在堆场中沿垂向、轴向和径向的运动规律,构建了堆场主沉降区内淤泥颗粒粒径范围从0.35~300μm沉降历时17 h的分层沉降模型,大致模拟出淤泥沉降规律.淤泥颗粒粒径呈现扇形分布,沿堆场方向沿程递减分布,砂粒在堆场的前250 m沉降完全,粉粒沿堆场水流方向依次沉降,黏粒大部分悬浮在水中,有利于后期实现堆场空间的有效利用和疏浚淤泥的资源化利用.
기우어니과립재수중적수력정황화관도사류기본이론,건립료괄용우퇴장어니과립적기본운동방정,득도료어니과립적침강속도분포도、수평관도사류각단면상적속도분포도화불동단면처축향속도분포도.통과의합어니과립재퇴장중연수향、축향화경향적운동규률,구건료퇴장주침강구내어니과립립경범위종0.35~300μm침강력시17 h적분층침강모형,대치모의출어니침강규률.어니과립립경정현선형분포,연퇴장방향연정체감분포,사립재퇴장적전250 m침강완전,분립연퇴장수류방향의차침강,점립대부분현부재수중,유리우후기실현퇴장공간적유효이용화소준어니적자원화이용.
@@@@Based on the load conditions of the sludge particles in water and basic theory of circular pipeline jet ,the basic motion e‐quations suitable for the sludge particles were established .Accordingly ,the distribution of settling velocity of sludge particles , the velocity distribution of horizontal pipeline jet flow for each section ,and the axial velocity distribution of different radial dis‐tances were obtained .A layered settlement model was constructed by fitting the motion regularity of the sludge particles along three directions :vertical ,axial ,and radial ,which can simulate the settlement regularity of sludge particles with a grain size be‐tween 0.35 μm and 300μm in the main district of the storage yard during a time period of 17 hours .The particle size was char‐acterized by a fan‐shaped distribution which decreased along the length of the storage yard .The sand particles were completely settled in the first 250 m of storage yard ,the silty sand particles were settled along the flow direction in the storage yard ,and the viscous sand particles mainly suspended in the water ,which can be beneficial for the effective use of the storage yard and u‐tilization of dredged sludge .