基于亚高山草甸不同深度的根土复合体抗剪强度研究  

Research on Shear Strength of Root and Soil Complexes with Different Depths in Subalpine Meadows

作　　者：陈立畅 张福发 陈乐言 杨才高 李鑫龙 陈平平 CHEN Li-chang;ZHANG Fu-fa;CHEN Le-yan;YANG Cai-gao;LI Xin-long;CHEN Ping-ping(College of Mechanical and Electrical Engineering,Yunnan Agricultural University,Kunming 650201,China;College of Tea Science,Yunnan Agricultural University,Kunming 650201,China;Power China Kunming Engineering Corporation Limited,Kunming 650061,China)

机构地区：[1]云南农业大学机电工程学院,云南昆明650201 [2]云南农业大学茶学院,云南昆明650201 [3]中国电建集团昆明勘测设计研究院有限公司,云南昆明650061

出　　处：《江西农业学报》2025年第2期18-22,共5页Acta Agriculturae Jiangxi

基　　金：云南省水利科技重大专项(2023BG204001)。

摘　　要：为明确亚高山草甸不同深度根土复合体的力学特性对机械化草甸取草的意义,以云南寻甸高本山区亚高山草甸作为研究对象,通过对不同深度的亚高山草甸根土复合体进行直接剪切试验来测定其抗剪强度,并对抗剪强度特性采用摩尔—库伦模型进行拟合分析。结果表明:随着亚高山草甸深度的增加,其抗剪强度逐渐减小,0~10 cm土层深度根土复合体的抗剪强度最大,20~30 cm土层深度根土复合体抗的剪强度最小;采用摩尔—库伦模型对根土复合体抗剪特性参数的模拟效果较为明显,内摩擦角在一定范围内基本保持恒定,但内聚力值的变化较为明显,说明内摩擦角对抗剪强度的影响较小,而内聚力对抗剪强度的影响较为显著。研究结果可为亚高山草甸植被起草设备的设计提供参考。It is of great significance to clarify the complex physical characteristics of subalpine meadows with different depths of root and soil for mechanized grassland grassing.The subalpine meadow in Gaoben Mountain Area of Xundian,Yunnan was taken as the research object,and the shear strength of the subalpine meadow at different depths was determined by conducting direct shear tests.The shear strength characteristics of the Moore-Cullen model were used for fitting analysis.The results show that with the increase of the depth of the sub-alpine meadow,its shear strength gradually decreases.The shear strength of the root-soil complex with a depth of 0~10 cm is the highest,and the shear strength of the root-soil complex with a depth of 20~30 cm is the smallest.The simulation effect of The Moor-Cullen model is relatively obvious.The internal friction angleφis basically constant within a certain range,and the change of the c value of its cohesion force is relatively obvious,indicating that the impact of the internal friction angle on the shear strength is relatively small,and the impact of the cohesion force on it is more significant.The research results can provide a reference for the design of subalpine meadow vegetation drafting equipment.

关 键 词：亚高山草甸 深度 根土复合体 抗剪强度 

分 类 号：S157.4[农业科学—土壤学]