茶树根土复合体抗剪强度试验研究  

Experimental Study on the Shear Strength of Tea Tree Root-Soil Composite

作　　者：许少鸿 陈灵祺 XU Shaohong;CHEN Lingqi(Zijin School of Geology and Mining,Fuzhou University,Fuzhou 350116)

机构地区：[1]福州大学紫金地质与矿业学院,福州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)。

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.

关 键 词：茶树根系 含根量 根径 根系形态 抗剪强度 

分 类 号：TU411[建筑科学—岩土工程]