详情

原文传递 Midwest Guardrail System for Long-Span Culvert Applications.

题名：	Midwest Guardrail System for Long-Span Culvert Applications.
作者：	bielenberg, r. w. faller, r. k. rohde, j. r. reid, j. d. sicking, d. l.
关键词：	low-fill culverts, midwest guardrail system
摘要：	Long-span guardrail systems have been recognized as an effective means of shielding low-fill culverts. These designs are popular due to their ability to safely shield the culvert while creating little additional construction effort and limiting the damage and repair of the culvert when compared to other systems that attach posts to the top of the culvert. However, previous long-span designs were limited by the need to use long sections of nested guardrail to prevent rail rupture and the need for large lateral offsets between the barrier and the culvert. The MGS long-span guardrail described herein eliminates those two shortcomings by applying the benefits of the Midwest Guardrail System (MGS) to a long-span design. The MGS long-span increased vehicle capture and stability through increased rail height, limited the potential for pocketing and wheel snag through the use of CRT posts adjacent to the unsupported span, and greatly increased the tensile capacity of the rail through the movement of splices away from the posts and the use of shallower post embedment. These features allowed the system to be developed without the use of nested guardrail and with a minimal barrier offset that places the back of the guardrail posts even with the front face of the culvert. / NOTE: Final Report 2004-2007. / Supplementary Notes: See Also PB2003-101590. Sponsored by Federal Highway Administration, Lincoln, NE. Nebraska Div. and Midwest States' Regional Pooled Fund Program, Lincoln, NE. / Availability Note: Also available on CD-ROM. 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：	u0816；172p
报告类型：	科技报告