四面六边框架用于窝崩体内防冲促淤试验研究

Experimental study on application of tetrahedron-like penetrating frames to siltation promotion and erosion control for dike pit-type slide

以南京三江口窝崩后实测地形资料为基础,建立了窝崩的概化模型。在模型中的崩窝体内布置了不同间距的四面六边框架、窝内沿岸带(相当于原体地形-15 m等高线以上)也布置了不同间距的四面六边框架,以及四面六边框架与口门潜锁坝组合等方案的试验研究工作。通过研究,认为窝内四面六边框架布置间距与工程量之间存在着一个最佳关系,并对此进行了讨论,提出了最佳间距;进行了单独工程(窝内工程)和上述联合工程的效果比较试验。研究表明,联合工程的效果虽比单独工程的效果要好但有限。

Based on the actual measured topographic data of the dike pit-type slide occurred at Sanjiangkou in Nanjing, a gen- eralized model of dike pit-type slide is established herein. With this model, the experimental study is made with the schemes of arranging the tetrahedron-like penetrating frames with various spacing distances inside of the slide pit and along the zone of hank （ eorresportding to above - 15 m of the contour of the original topography） in the pit and the combination of the tetrahed- ron-like penetrating frames with the submerged closure dikes at the entrance. Through the study concerned, it is considered that an optimal relationship is there between both the spacing distance for arranging the frames and the relevant construction quantity; for which a discussion is made and then the optimal spacing distance is put forward. Moreover, a comparative experi- ment is also made on the effects from both the single project （ only arranging the frames inside of the slide pit） and the com- bined project mentioned above. The study shows that even though the effect from the combined project is better than that from the single, it is limited.