详情

原文传递 Three-Dimensional Roughness Elements for Snow Retention.

题名：	Three-Dimensional Roughness Elements for Snow Retention.
作者：	tabler, r. d.
关键词：	economical aspects, testing, development, comparisons, design
摘要：	The objective of this study was to develop a practical and economical method retaining snow along roadsides in order to reduce icing caused by blowing snow. Although multiple rows of conventional 4-ft snow fence could serve this purpose, it was hypothesized that a three-dimensional array of elements might be more effective and aesthetic, and might prove to be more economical. An idea leading to the research reported here was for tetrapodal elements constructed from 2 x 4 lumbers, and this was later expanded to include the development and testing tubular, wire frame-supported plastic netting. The study consisted of developing, testing, and comparing these alternative roughness elements. Conclusions from this study are as follows: The 3-ft-tall tetrapod developed in this study is an efficient design that minimizes costs for materials and labor. Tetrapods are the most costly element to fabricate and install and the physical structure of tetrapods presents a potential collision hazard to errant vehicles. Tank baffles are effective in collecting snow, but their cost is approximately twice that of tetrapods. Snow snakes are significantly less costly than tetrapod arrays, and their cost per unit volume of snow storage is comparable to that of conventional snow fence of equal height installed on wood or steel posts. The primary advantages of snow snakes over conventional snow fences are their unobtrusive appearance, and the fact that they present no hazard to errant vehicles. They also promote the reestablishment of vegetation by increasing soil moisture, providing shade, and by providing protection from wind and grazing animals. Snow snakes drifts in medians would also help to restrain vehicles that would otherwise cross over into oncoming traffic. / NOTE: Final rept. (Nov 03-Aug 06). / Supplementary Notes: Sponsored by Wyoming Dept. of Transportation, Cheyenne. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0709；200p
报告类型：	科技报告