不同复绿技术模式对崩岗崩壁稳定性影响研究

摘要

This paper studied the effect of the different green technology patterns on the stability of the caved wall in the collapse gully, and analysed the change of soil erosion modulus,soil moistuer and the stability of the caved wall. Results showed that,the green tech-nology patterns can significantly reduce soil erosion modulus (P=0. 05 ). There was a significantly linear function between soil moisture and the antecedent precipitation. The green technology patterns can significantly increase the stability coefficient of the caved wall (P=0. 05 ). The function of the quadratic parabola can be used to describe the relationship between the moisture and the stability coefficient of the caved wall. Based on the function,we calcualted the optimal moisture content which made the caved wall the most stable. The optimal moisture conten of the green technology treatments ranged from 17. 0% to 18. 2%. Overall,the green technology patterns re-duced the soil erosion modulus and increased the stability of the caved wall.%采用不同草灌复合模式对南方崩岗崩壁进行了复绿研究，分析了各复绿技术模式下崩壁土壤侵蚀模数、含水量及崩壁稳定系数。结果表明：各复绿技术模式能显著降低崩壁土壤侵蚀模数（P＝0．05），但各处理模式间崩壁土壤含水量无显著差异。崩壁土壤含水量与前期类降雨量间呈显著线性关系。各复绿技术模式处理崩壁稳定系数显著高于未处理崩壁稳定系数（P＝0．05），但各复绿技术模式崩壁稳定系数间无显著差异。崩壁稳定系数与土壤含水量间呈开口向下的二次抛物线关系，基于二者函数关系计算了各处理崩壁稳定系数最大所对应的崩壁适宜含水量，未处理崩壁适宜含水量最小。总体而言，不同复合技术模式均减低了崩壁土壤侵蚀模数，提高了崩壁稳定性。