發(fā)布時(shí)間：2019-05-15 05:29

【摘要】：泥沙休止角的影響因素主要包括形狀、粒徑、重率、介質(zhì)、顆粒級(jí)配等,現(xiàn)有的研究主要側(cè)重于粒徑、重率、顆粒級(jí)配等因素,對(duì)于形狀和介質(zhì)對(duì)泥沙休止角的影響的研究較少且存在不足。采用篩分法,將天然沙石分為5個(gè)不同的粒徑組,并將10~15 mm、15~20 mm兩個(gè)較大粒徑組的沙石分為圓球、扁平、橢球3種不同的形狀,然后利用自制的抽板泥沙休止角測(cè)量?jī)x器測(cè)量了泥沙在空氣中和水中的休止角。結(jié)果表明,粗沙在空氣中的休止角大于在水中的休止角,而細(xì)沙在水中的休止角大于在空氣中的休止角;對(duì)于同一粒徑組,橢球形的泥沙休止角最大,扁平形次之,圓球形最小。
[Abstract]:The influencing factors of sediment rest angle mainly include shape, particle size, weight rate, medium, particle gradation and so on. The existing research mainly focuses on particle size, weight rate, particle size distribution and so on. There are few and insufficient studies on the influence of shape and medium on sediment rest angle. The natural sand and stone were divided into five different particle size groups by screening method, and the sand and stone of 10 鈮，

本文編號(hào)：2477346