CAJ | 학술논문

反滤层是渗渠取水工程中最重要的组成部分，渗渠反滤层是防止河床土体渗透破坏的有效措施，是渗渠出水水质的重要保障，反滤层的结构组成以及渗透性能直接影响渗渠“滤土”和“排水”效能。结合工程实际，通过水工模型试验，探讨反滤结构组成对渗渠渗滤作用的影响。试验研究和理论分析表明：反滤层结构变化对渗渠的集水流量和净滤作用都有较大影响，若以集水流量为主要指标，则单一均质滤层＞多层均质滤层＞级配滤层；若以净滤作用为主要指标，则多层均质滤层与级配滤层的去浊能力远高于单一均质滤层，且随着表层积沙厚度的增加，级配反滤层有更加明显的去浊效果，而且随着过流时间的增长，三种类型滤层结构的渗渠取水效能会越来越低。本研究成果对于渗渠结构在工程实际中的设计、施工、运行提供了一定的实践和理论依据。
반려층시삼거취수공정중최중요적조성부분，삼거반려층시방지하상토체삼투파배적유효조시，시삼거출수수질적중요보장，반려층적결구조성이급삼투성능직접영향삼거“려토”화“배수”효능。결합공정실제，통과수공모형시험，탐토반려결구조성대삼거삼려작용적영향。시험연구화이론분석표명：반려층결구변화대삼거적집수류량화정려작용도유교대영향，약이집수류량위주요지표，칙단일균질려층＞다층균질려층＞급배려층；약이정려작용위주요지표，칙다층균질려층여급배려층적거탁능력원고우단일균질려층，차수착표층적사후도적증가，급배반려층유경가명현적거탁효과，이차수착과류시간적증장，삼충류형려층결구적삼거취수효능회월래월저。본연구성과대우삼거결구재공정실제중적설계、시공、운행제공료일정적실천화이론의거。
Filter layer ,an effective measure to prevent the damage of bed soil infiltration and an important guarantee of infiltration water quality ,is the most important part in infiltration galleries ,its structure compositions and permeability properties can directly affect the infiltration gallery efficiency of “filtering”and“draining” .Based on the engineering practices ,exploring the influence of in‐verted filter structure composed on the percolation of infiltration galleries by hydraulic model tests .Experimental study and theoreti‐cal analysis show that the inverted filter structure changes have a great effect on both catchwater and filtering .When catchwater is a main index ,the single homogeneous layer is the best ,multi‐homogeneous inverted filter take the second place and grading filter layer is worst .When filtering is the main index ,the multi‐homogeneous layer and grading filter layer is better than single homogeneous in‐verted filter ,and with the thickness growth of surface sand ,there are more pronounced effect in grading filter layer .As the over current time increases ,the efficiency will be more and lower to three types filter layer structure .This study results provides some practical and theoretical basis in seepage drainage structure design ,construction and operation .