Study on the effect of water retaining agent content on the shear characteristics of soil-rock interface

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-16 DOI:10.1007/s10064-025-04288-x

Fengzhan Hou, Zhenqiang Ni, Shihao Wang, Wenlan Li, Long Bing

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引用次数: 0

Abstract

In order to study the effect of water retaining agent content on the shear characteristics of soil-rock structural interface, the water retaining agent contents were set to be 0%, 0.1%, 0.3%, 0.5%, and the water contents were set to be 4%, 7%, 10%, 13%, 16%, and 19%, and the interfacial direct shear experiments were carried out under the normal stresses of 50 kPa, 100 kPa, 150 kPa, and 200 kPa. The results show that: when the water retaining agent content is 0.3%, the shear strength of soil-rock interface is the highest, and the value is close to that without water retaining agent when the water content is 4%-13%; with further increase in water content, the shear strength of soil-rock interface with 0.3% water retaining agent content is higher than that without water retaining agent; the internal friction angle at the soil-rock interface with the water retaining agent content of 0.3% is close to that without water retaining agent, and higher than that with other contents; the soil-rock interfacial cohesion at 0.1% and 0.3% water retaining agent is higher than that without water retaining agent; the residual strength ratio at the soil-rock interface without water retaining agent is less than that at the soil-rock interface with the water retaining agent content of 0.3%. The nonlinear constitutive. model of soil-rock interface shear is found by using a hyperbolic model combined with experimental parameters in this paper. Comparing the model data with the experimental data, it is found that the model fits well.

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保水剂含量对土石界面剪切特性的影响研究

为了研究保水剂含量对土石结构界面剪切特性的影响，将保水剂含量设置为0%、0.1%、0.3%、0.5%，含水量设置为4%、7%、10%、13%、16%、19%，分别在50 kPa、100 kPa、150 kPa、200 kPa的法向应力下进行界面直剪实验。结果表明：当保水剂掺量为0.3%时，土石界面抗剪强度最高，且与不掺保水剂时的值接近；随着含水率的进一步增加，保水剂含量为0.3%的土石界面抗剪强度高于不含保水剂的土石界面抗剪强度；保水剂含量为0.3%时，土-岩界面处的内摩擦角与不含保水剂时接近，且高于其他含量时的内摩擦角；添加0.1%和0.3%保水剂时，土-岩界面黏聚力高于不添加保水剂时；不添加保水剂的土-岩界面残余强度比小于添加0.3%保水剂时的土-岩界面残余强度比。非线性本构。本文采用双曲模型结合试验参数，建立了土石界面剪切模型。将模型数据与实验数据进行比较，发现模型拟合良好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.