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原文传递 User's Guide: Subsurface Drainage for Military Pavements; Final rept

题名：	User's Guide: Subsurface Drainage for Military Pavements; Final rept
作者：	Grogan, W. P.
关键词：	Pavement bases; Permeability; Deterioration; Subsurface; Saturation; Stability
摘要：	Research conducted at the US Army Engineer Waterways Experiment Station (WES), the construction Engineering Research Laboratory (CERL), and the Cold Regions Research and Engineering Laboratory (CRREL) has shown that bases and subbases for military pavements constructed to meet Corps of Engineers dense graded base course density and gradation criteria are virtually impermeable. Therefore, new criteria that provide for rapid draining of base courses have been set forth in engineer Technical Letter (ETL) 1110-3-435 (1992) (see Appendix A). The new criteria call for a drainage layer to be constructed within the structural section of the pavement system. By providing a drainage layer in the pavement system, moisture entering the pavement system, particularly through surface infiltration, can be quickly removed. The specification and QC/QA procedure for constructing base course drainage layers represent a departure from long term end-product specifications for compaction in military construction. A process specification is used. This requires real time visual verification of compaction procedures for this layer in the system.
总页数：	54p
报告类型：	科技报告