摘要
以茶树根系为研究对象,开展茶树根土复合体直剪试验,设计了不同含根量、根径以及根系分布形态对根土复合体抗剪强度的影响,量化了黏聚力及内摩擦角的变化规律。试验结果表明:茶树根系和土体之间的相互作用相较裸土而言更强,土体间形成强度更大的复合体,根土复合体的抗剪强度显著增大,并表现在黏聚力和内摩擦角的整体提高。其中,土体抗剪强度随着含根量的提高而增加,且内摩擦角涨幅要显著高于黏聚力,当含根量为1.0%时,试样抗剪强度增量约为29%,内摩擦角增量高达31.8%;随着根径的增大,土体的抗剪强度逐渐增加;根系分布形态的差异导致土体抗剪强度增量表现出不同的规律,混合布根相较于水平布根方式,试样抗剪强度增量约为10%,垂直布根相较于水平布根方式,抗剪强度增量约为4%。
In this paper,the effect of different root content,root diameter and root distribution patterns on the shear strength of the root-soil complex was investigated,and the changes in cohesion and internal friction angle were quantified.The test re-sults show that the interaction between tea tree roots and soil is stronger than that between bare soil,and the soil forms a stronger composite.The shear strength of the soil increased with the increase of root content,and the increase of internal fric-tion angle was significantly higher than that of cohesion,when the root content was 11.0%,the increase of shear strength was about 29%,and the increase of internal friction angle was as high as 31.8%;as the root diameter increases,the shear strength of the soil gradually increases;the differences in root distribution patterns lead to different patterns of shear strength increase,with mixed rooting increasing the shear strength of the specimen by approximately 10%compared to horizontal rooting,and vertical rooting increasing the shear strength by approximately 4%compared to horizontal rooting.
作者
许少鸿
陈灵祺
XU Shaohong;CHEN Lingqi(Zijin School of Geology and Mining,Fuzhou University,Fuzhou 350116)
出处
《土工基础》
2025年第1期139-143,共5页
Soil Engineering and Foundation
基金
国家自然科学基金(U2005205,41972268)
福建省高校产学研联合创新项目(2022Y4002)
福建省交通运输科技项目(202202)。
关键词
茶树根系
含根量
根径
根系形态
抗剪强度
Tea Tree Root System
Root Content
Root Diameter
Root System Morphology
Shear Strength
作者简介
许少鸿(1997-),男,硕士研究生,研究方向为岩土工程。
