非贯通锯齿状结构面剪切破裂演化机制试验研究

doi:10.3969/j.issn.1674-0696.2021.12.18

重庆交通大学学报（自然科学版） ›› 2021, Vol. 40 ›› Issue (12): 117-123.DOI: 10.3969/j.issn.1674-0696.2021.12.18

• 交通基础设施工程 • 上一篇

非贯通锯齿状结构面剪切破裂演化机制试验研究

吉锋1，闫兴田2，张波1

(1. 成都理工大学地质灾害防治与地质环境保护国家重点实验室，四川成都 610059； 2. 中国电建华东勘测设计院（福建）有限公司，福建福州 350000)

收稿日期:2020-04-23 修回日期:2020-10-29 发布日期:2021-12-27
作者简介:吉锋(1980—)，男，四川成都人，副教授，主要从事重大地质灾害稳定性预测评价方面的研究。E-mail:jeifens@163.com 通信作者：张波（1995—），男，四川绵阳人，硕士研究生，主要从事滑坡灾害稳定性预测评价方面的研究。E-mail:1665002261@qq.com

Experimental Study on Shear Fracture Evolution Mechanism of Non-penetrating Serrated Structural Surface

JI Feng1, YAN Xingtian2, ZHANG Bo1

(1. State Key Laboratory of Geo-hazard Prevention and Geo-environment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China; 2. China Power Construction Group East China Investigation and Design Institute Co., Ltd., Fuzhou 350000, Fujian, China)

Received:2020-04-23 Revised:2020-10-29 Published:2021-12-27

摘要/Abstract

摘要： 岩体是由岩石和结构面两部分组成，结构面对岩体的变形和破坏常常起决定性作用。在工程中，所遇到的岩体多为非贯通结构面岩体，研究非贯通结构面岩体的破坏模式和强度准则具有非常深远的意义。利用人工浇铸的非贯通锯齿状结构面试样，基于控制变量法，通过直剪试验，研究在不同轴向压力下不同结构面倾角的非贯通锯齿状结构面的变形破坏特征及抗剪强度变化规律。结果表明：随着预设结构面倾角及法向压应力的增大，非贯通锯齿状结构面的破坏机制会逐渐由拉剪-剪胀破坏、拉剪-剪胀剪断破坏向剪切破坏转变，且其抗剪强度也会增大，并据此修正了抗剪强度经验公式。

关键词: 岩土工程；非贯通结构面；锯齿状；结构面倾角；破坏过程；抗剪强度

Abstract: The rock mass was composed of rock and structural plane. The structure plane often played a decisive role in the deformation and failure of the rock plane mass. In the project, most of the rock masses encountered were non-penetrating structural plane rock masses. The failure mode and strength criterion of the non-penetrating structural plane rock masses had very far-reaching significance. Based on the control variable method and direct shear test, the artificially cast non-penetrating serrated structural surface specimens were used to study the deformation and failure characteristics and shear strength variation rule of non-penetrating serrated structural planes with different structural plane inclination angles under different axial pressures. The results show that with the increase of the preset structural plane inclination angle and normal compressive stress, the failure mechanism of non-penetrating serrated structural surface will gradually change from tension shear-dilatancy failure and tension shear-dilatancy shear failure to shear failure, and its shear strength will also increase. And a new empirical formula for shear strength is established accordingly.

Key words: geotechnical engineering; non-penetrating structural surface; serrated; structural plane inclination; failure process; shear strength

中图分类号:

TU452

吉锋1，闫兴田2，张波1. 非贯通锯齿状结构面剪切破裂演化机制试验研究[J]. 重庆交通大学学报（自然科学版）, 2021, 40(12): 117-123.

JI Feng1, YAN Xingtian2, ZHANG Bo1. Experimental Study on Shear Fracture Evolution Mechanism of Non-penetrating Serrated Structural Surface[J]. Journal of Chongqing Jiaotong University(Natural Science), 2021, 40(12): 117-123.

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非贯通锯齿状结构面剪切破裂演化机制试验研究

Experimental Study on Shear Fracture Evolution Mechanism of Non-penetrating Serrated Structural Surface

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