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Gravel roads : maintenance and design manual

Thảo luận trong 'Tiếng Anh chuyên ngành' bắt đầu bởi nxh07, 26/09/09.

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  1. nxh07
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    nxh07 Moderator Thành viên BQT

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    Gravel roads : maintenance and design manual

    [​IMG]
    info:
    Gravel roads : maintenance and design manual
    By Ken Skorseth
    Publisher: U.S. Dept. of Transportation, Federal Highway Administration
    Number Of Pages:
    Publication Date: 2000
    ISBN-10 / ASIN: B000115EM2
    ISBN-13 / EAN:

    There are over 1.6 million miles of unpaved roads (53% of all roads) in the United States.
    In some nations, the road network is predominantly unpaved and generally consists of
    gravel roads. This manual was developed with a major emphasis on the maintenance of gravel
    roads, including some basic design elements.
    Gravel roads are generally the lowest service provided to the traveling public and are usually
    considered greatly inferior to paved roads. Yet,in many rural regions, the volume of traffic is
    so low that paving and maintaining a paved road is not economically feasible. In many cases,
    gravel roads exist to provide a means of getting agricultural products in and out of farm fields,
    timber out of forests, or as access to remote areas such as campgrounds and lakes. Many
    gravel roads serve rural residents as well. Many of these roads will remain unpaved due to
    very low traffic volume and/or lack of funds to adequately improve the subgrade and base
    before applying pavement layer(s).In some countries, economic constraints mean gravel
    roads are the only type that can be provided.
    The purpose of this manual is to provide clear and helpful information for doing a better job
    of maintaining gravel roads. It is recognized that very little technical help is available to small
    agencies that are responsible for managing these roads. Gravel maintenance has traditionally

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  2. vantiep
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    vantiep Super Moderators Thành viên BQT

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    It was said about mantance and design manual. At here, we study about AASHTO standar and the using field.

    Contents include :
    1. Section I: Routine Maintenance and Rehabilitation
    2. Section II: Drainage
    3. Section III: Surface Gravel
    4. Section IV: Dust Control/Stabilization
    5. Section V: Innovations

    Have nice weekend!:001 (75):
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