Author
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Hanson, Gregory |
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Robinson, Kerry |
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Submitted to: Proceedings ASCE North American Water and Environment Congress
Publication Type: Proceedings Publication Acceptance Date: 6/22/1996 Publication Date: N/A Citation: N/A Interpretive Summary: In the management of water there are certain applications in which soil is used (i.e., dams, embankments, levees, spillways, and channels). Engineers rely primarily on field-measured water content and dry density to verify proper compaction of soil. This approach evolved from the practice for structural fills for which strength and compressibility are of primary concern. In water management the erosion resistance of the compacted soil is also an engineering concern. In this paper a submerged jet apparatus is used to measure and compare the erosion resistance of a soil prepared in the laboratory and in the field. The results from the tests indicate that at the compaction energy used in the field tests of this soil, a compaction water content of 15% would be required for this soil to be consistently resistant to erosion. Technical Abstract: In water management the erosion resistance of compacted soil is an engineering concern. This paper measures and compares the erosion resistance of a soil prepared in the laboratory and in the field at various water contents and dry densities. A submerged jet test is used to make comparisons. A jet index is determined from the tests, indicating erosion resistance. A jet index greater than 0.015, between 0.005 and 0.015, and less than 0.005 are nonresistant, moderately resistant, and resistant respectively. The results from the laboratory and field tests indicate that at the compaction energy level used for this soil, a water content of approximately 15% would be required to be consistantly resistant to erosion. |
