[1]付江涛a,李晓康b.垂穗披碱草根系力学特性统计分析[J].山地学报,2020,(6):894-903.[doi:10.16089/j.cnki.1008-2786.000565]
 FU Jiangtaoa,LI Xiaokangb.Statistical Analysis on Mechanical Characteristics of Roots of Elymus nutans[J].Mountain Research,2020,(6):894-903.[doi:10.16089/j.cnki.1008-2786.000565]
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垂穗披碱草根系力学特性统计分析
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2020年第6期
页码:
894-903
栏目:
山地灾害
出版日期:
2021-05-01

文章信息/Info

Title:
Statistical Analysis on Mechanical Characteristics of Roots of Elymus nutans
文章编号:
1008-2786-(2020)6-894-10
作者:
付江涛a李晓康b
陕西理工大学 a.土木工程与建筑学院; b.数学与计算机科学学院,陕西 汉中 723000
Author(s):
FU Jiangtaoa LI Xiaokangb
a. School of Civil Engineering and Architecture; b. School of Mathematic and Computer Science, Shaanxi University of Technology, Hanzhong 723000, Shaanxi, China
关键词:
植被护坡 根系力学指标 分布函数
分类号:
P642.5
DOI:
10.16089/j.cnki.1008-2786.000565
文献标志码:
A
摘要:
垂穗披碱草作为一种适应性强、分布广泛的优良水土保持植物,广泛应用于各类山区生态恢复/修复工程。为合理评估垂穗披碱草在水土保持工程中的力学作用,本文对生长于青海省河南县的多年野生垂穗披碱草(Elymus nutans Griseb.)根系进行单根拉伸试验,测定其单根根径、抗拉力、抗拉强度、拉伸率和拉伸模量等五项力学指标; 通过数理统计模型(正态分布、瑞利分布、伽马分布和威布尔分布)对五项力学指标分布特性进行统计分析; 采用卡方检验(χ2检验)和柯尔莫哥洛夫-斯米洛夫检验(K-S检验)对五项指标在不同分布函数中的显著性进行了检验; 对比了两种检验方法的优劣,确定各指标的最优分布函数。研究结果表明:垂穗披碱草根系力学五项指标表现出巨大的变异性,变异系数为37.01%~76.00%; 四种分布函数均可定性描述根系各指标的分布特征,但不同指标在不同分布函数下表现出一定程度的差异; 相较于χ2检验,K-S检验由于其更适用于小样本数据,其检验结果更具有可信性; 五项指标中,根径和拉伸率最优分布函数均为伽马分布,抗拉力和抗拉强度最优分布函数均为威布尔分布,拉伸模量最优分布函数为正态分布。该研究结果对于深入认识垂穗披碱草根系力学特性,揭示垂穗披碱草在水土保持工程中的力学机制具有重要的理论价值。

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备注/Memo

备注/Memo:
收稿日期(Received date):2019-07-14; 改回日期(Accepted date): 2020-11-02
基金项目(Foundation item):陕西教育厅专项基金(18JK0141); 陕西理工大学人才启动基金(SLGQD2017-02)。[Special Fund for Shaanxi Education Department(18JK0141); Talent Start-up Fund for Shaanxi University of Technology((SLGQD2017-02)]
作者简介(Biography):付江涛(1981-)男,陕西汉台人,博士,讲师,主要研究方向:环境岩土工程、工程力学。[FU Jiangtao(1981-), male, born in Hantai, Shaanxi Province, Ph. D., lecture, specialized in environmental geotechnics, and engineering mechanics] E-mail: fujiangtao865@sina.com
更新日期/Last Update: 2020-11-30