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[1]YANG Liu,HAO Shilong,FAN Yunpeng.Analysis of the Ridge Stability of Level Terrace in Southwest He’nan Province[J].Research of Soil and Water Conservation,2018,25(01):282-286.

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Analysis of the Ridge Stability of Level Terrace in Southwest He’nan Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 01 Page number: 282-286 Column: Public date: 2018-02-28

Title:: Analysis of the Ridge Stability of Level Terrace in Southwest He’nan Province

Author(s):: YANG Liu¹, HAO Shilong^2,3, FAN Yunpeng⁴; 1. Supervision and Monitoring Station of Soil and Water Conservation in Nanyang City, Nanyang, He’nan 473000, China;
2. School of Resources and Environment, North China University of Water Resources and Electric Power, Zhengzhou 450011, China

Keywords:: southwest He’nan; level terrace; ridge; stability analysis

CLC:: S157.3⁺1

DOI:: -

Abstract:: Slop-terrace transformation project has obvious effect on improving the cultivated land economic and ecological benefits. The proper cross section design is the key to ensure the function implementation and operation of terrace, the terrace ridge stability is mainly affected by the ridge height, lateral slope, cohesion, internal friction angle and other factors, which have direct contact with the soil types. According to the great demand of slop-terrace transformation project in the southwest of He’nan Province, we selected the 5 major soil types and sampling in slope farmland distribution area of southern He’nan, after the tests of the basic physical and the triaxial consolidated-undrained shear tests on the soil samples in laboratory, we obtained the shear strength indexes of 5 kinds of soil types under the daily working conditions and heavy rain conditions. According to the different soil indicators of total cohesion, total internal friction angle, we designed 4 kinds of terrace ridge height and slope style, respectively, to different soil types, and with the software of Lizheng, analyzed the terrace stability of different soil types and different ridge and slope in the rainstorm conditions. The result show that:in the same condition, loess terrace meets the stability requirements under all kinds of loess terrace ridge height and slope style conditions, as to the Huanggang soil, when the ridge height is 2.5 m, the maximum slope terrace should not exceed 60°, otherwise, the terrace ridge slope does not meet the safety requirements of the stability, while as to brown soil, cinnamon soil and yellow-brown soil, the ridge terrace design height should not exceed 2 m and the slope should not exceed 65°, showing that, in the same condition, the stability of the loess terrace is the best, followed by Huanggang soil, while the stability of the brown soil, cinnamon soil and yellow-brown soil terrace is relatively weak. The results of this study can provide the scientific basis for the diversified design of ridged level terrace in southwest of He’nan Province.

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