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原文传递 Evaluation of Pavement Support for Pavement Design

题名：	Evaluation of Pavement Support for Pavement Design
其他题名：	AASHTO.(1993).Guide for design of pavement structures,Washington,DC.
正文语种：	英文
作者：	Wujun Zhou
关键词：	Modulus of subgrade reaction k value;Portland cement concrete (PCC) pavement;Pavement support condition evaluation testing;Various base types
摘要：	It is well-known that the performance of Portland cement concrete (PCC) pavement depends, to a great extent, on the support condition under the slab. The Texas Department of Transportation (TXDOT) recognized the importance of the support condition and requires the use of a stabilized base, either a 10.16-cm hot mix asphalt layer or a minimum 2.54-cm asphalt concrete over a 15.24-cm cement-stabilized layer. For pavement design purposes, 81.4 MPa=m has been used as the default value for the modulus of the subgrade reaction (k value) for the support provided by these bases. The use of a single value of 81.4 MPa=m for the k value in rigid pavement design was partly because of the insensitivity of the required slab thickness to the modulus of the subgrade reaction in the current TXDOT rigid pavement design procedure. To improve rigid pavement design, TXDOT developed a new design procedure for continuously reinforced concrete pavement (CRCP) on the basis of mechanistic-empirical principles and plans to implement the procedure. In this design procedure, the slab support has rather more substantial effects on the required slab thickness than the current TXDOT design procedure. To increase the reliability of the new pavement design procedure, accurate evaluations of the k value are important. A test section was constructed in which various base types were used, and a number of field tests were conducted to estimate the range of k values for the support systems that are currently used or expected to be utilized, including the placement of nonwoven geotextile in lieu of the asphalt layer. The current practice of using one default value of 81.4 MPa=m needs to be revised, and the use of nonwoven geotextile is not recommended until further evaluations prove its viability.
出版年：	2015
论文唯一标识：	P-72Y2015V141N09006
英文栏目名称：	Technical Papers
doi：	10.1061/(ASCE)TE.1943-5436.0000783
期刊名称：	Journal of Transportation Engineering
拼音刊名(出版物代码)：	P-72
卷：	141
期：	09
页码：	41-49