ทรัพยากร ระบุป้าย: Road Construction

4 รายการที่พบ (กำลังแสดง 1 - 4)

  1. Understanding Low-Cost Road Building

    01-01-1986 Roads vary from trails to major hard-surface highways. Depending on the local climate and materials available for construction, roads may sometimes be open to traffic for only part of the year. A year-round road is often more expensive to build, and may not always be necessary. As a general rule,...
    Road construction Road Building Low-Cost VITA Downloads

  2. Earth Moving Devices For Irrigation And Road-Building

    01-01-1987 Moving soil for irrigation and road-building is important to good farming. Careful preparation of land for irrigation and good water usage saves water, labor, and soil, and improves crop yields. Improved roads make communication easier between farmers, their suppliers, and their markets. Although...
    Earth Moving Irrigation Systems Road construction Road Building VITA Irrigation Management Downloads

  3. Building roads by hand: An introduction to labour-based road construction

    01-01-1990 This book serves as a brief introduction to labour-based road construction. It is aimed at supervisory staff and presents the broad technical, organisational and managerial principles of labour-based road construction works. 43 double-sided pages, illustrated Prepared for the International Labour...
    Road construction

  4. Earth roads: A practical guide to earth road construction and maintenance

    01-01-1996 The text covers two basic designs of eath road called, for convenience 'village' and 'market' roads; definitions based on levels of usage, from a few vehicles per day or week (village), to perhaps 50 vehicles per day (market). The text describes the drainage principles and techniques; route...
    Road construction Excavation