详情

原文传递 Design Considerations for Flexible Pavement Widening.

题名：	Design Considerations for Flexible Pavement Widening.
作者：	hilbrich, s. scullion, t.
关键词：	widening, construction, projects, compaction, recycling, traffic control, stability, guidelines, texas
摘要：	The Texas Department of Transportation, TxDOT, prepared Safety Bond Projects that were to undertake the letting of construction projects for flexible pavement widening on current pavement widths less than 24 feet. Typically, these projects were approximately 20 foot widths, where widening will extend the pavement width to approximately 27 to 28 feet. Few guidelines exist statewide for assisting designers in selecting the appropriate widening technique. Current specifications provide a basic framework for construction performance and compaction; however, there are major pavement related issues that are not addressed. Some of these issues include: meeting density requirements on narrow sections, placing the joint in the wheel path, and not matching pavement sections, which can cause moisture to be trapped in the original structure. To address these considerations and others, this project focused on an extensive literature review and a survey of various district personnel regarding project selection and issues faced during construction of widening projects. This study concluded with a site-specific approach to selection of proper material use and/or re-use, construction technique and traffic control to warrant rapid construction and long-term stability of the widened pavement, which is summarized into a flexible pavement widening guideline. / NOTE: Technical rept. (Sept. 2005-Aug. 2006). / Supplementary Notes: Sponsored by Texas Dept. of Transportation, Austin. Research and Technology Implementation Office. and Federal Highway Administration, Austin, TX. Texas Div. / 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：	u0715；68p
报告类型：	科技报告