Civil engineer guide to fighting positions, shelters, obstacles

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AFH 10-222 Volume 14 1 August 2008 110 5.3.3. Sandbag Revetment Construction Details. After properly siting the location for sandbag revetments, begin by filling the bags approximately 3/4 full with soil or a soil-cement mixture. Overfilling the sandbags will prevent them from being flattened or shaped. To fill in voids between bags, fill bags with less soil. The useful life of sandbags can be prolonged by filling them with a mixture of dry earth and cement, normally in the ratio of 1 part cement to 10 parts dry earth. The cement sets as the bags take on moisture. A ratio of 1:6 should be used for a sand-gravel mixture. To expedite the sandbag filling process, an expedient sandbag filler such as that illustrated in Figure 5.13, can be constructed if materials are available. Prefabricated sandbag fillers can also be purchased commercially (check with the servicing logistics function). Figure 5.13. Expedient Sandbag Filler.
AFH 10-222 Volume 14 1 August 2008 111 5.3.3.1. Free-Standing Sandbag Revetment. For a free-standing revetment, the sandbags should be sloped between 4:1 and 5:1 (vertical to horizontal) for any structure over 2 feet (Figure 5.14). Construct the bottom row of the revetment with sandbags placed as headers; then, alternate rows of headers and stretchers as indicated, staggering the joints between layers of sandbags. Each sandbag should be pounded with a flat object, such as a 2- by 4-inch board, to make the wall more stable. Stretchers should be placed with the sewn seams facing towards the reveted face, while headers are placed with the tied ends facing towards the reveted face. Ensure the top row of the revetment consist of headers. Before constructing sandbag revetments, determine if the base of the structure will need to be reinforced. Figure 5.14. Sandbag Revetments – Layout and Construction.
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Civil engineer guide to fighting positions, shelters, obstacles

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