基于点荷载的隧道洞渣饱和抗压强度快速评价方法

doi:10.3973/j.issn.2096-4498.2023.07.009

隧道建设（中英文） ›› 2023, Vol. 43 ›› Issue (7): 1161-1169.DOI: 10.3973/j.issn.2096-4498.2023.07.009

基于点荷载的隧道洞渣饱和抗压强度快速评价方法

谢京谕1, 2，李化建1, 3, *，王振1, 3，黄法礼1, 3，易忠来1, 3

（1. 中国铁道科学研究院集团有限公司，北京 100081； 2. 重庆大学材料科学与工程学院，重庆 400044； 3. 高速铁路轨道技术国家重点实验室，北京 100081）

出版日期:2023-07-20 发布日期:2023-08-06
作者简介:谢京谕（1998—），男，四川巴中人，重庆大学材料与化工专业在读硕士，研究方向为固体废弃物建材资源化。Email: xiejingyu959@163.com。 *通信作者：李化建， Email:chinasailor@163.com。

A Rapid Evaluation Method for Saturated Compressive Strength of Tunnel Muck Based on Point Load

XIE Jingyu1, 2, LI Huajian1, 3, *, WANG Zhen1, 3, HUANG Fali1, 3, YI Zhonglai1, 3

(1. China Academy of Railway Sciences Corporation Limited, Beijing 100081, China; 2. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; 3. State Key Laboratory for Track Technology of High-Speed Railway, Beijing 100081, China)

Online:2023-07-20 Published:2023-08-06

摘要/Abstract

摘要： 为探明采用点荷载对机制砂用隧道洞渣饱和抗压强度进行快速评价的可行性，以点荷载强度指数为评价指标，研究加载方式、含水状态对20种不同岩性隧道洞渣点荷载强度指数的影响规律，建立隧道洞渣点荷载强度指数与饱和抗压强度的关系。结果表明： 1）隧道洞渣点荷载强度指数与其饱和抗压强度具有较高的相关性，依据变质岩、沉积岩及岩浆岩等不同岩性分类得到的关系式相关性更高； 2）当轴向点荷载强度指数超过8.0 MPa时，不同加载方式下的隧道洞渣点荷载强度指数存在差异，径向加载与轴向加载的点荷载强度指数相近，不规则块体加载与轴向加载的点荷载强度指数差值增大； 3）隧道洞渣点荷载强度损失率与其含水率具有线性相关性，含水率越高，点荷载强度损失率越大。基于此，提出不同含水状态下的隧道洞渣饱和抗压强度预测公式。

关键词: 隧道洞渣, 点荷载, 饱和抗压强度, 快速评价

Abstract: Herein, the feasibility of using a point load for rapid evaluation of the saturated compressive strength(SCS) of tunnel muck is assessed by analyzing the effect of the loading mode and hydrous state of tunnel muck on the point load strength index(PLSI) of 20 tunnel muck samples with various lithologies. A correlation analysis is performed on the PLSI and SCS of the tunnel muck. The following results are obtained: (1) The PLSI is highly correlated with the SCS for samples with different lithologies, including metamorphic, sedimentary, and igneous rocks. (2) When the axial PLSI is >8.0 MPa, the PLSIs measured under different loading modes vary; the PLSIs measured under radial and axial loading are similar. However, the difference in the PLSIs measured under irregular and axial loading increases with the point load. The loss rate of the PLSI is positively and linearly correlated with the water content of the tunnel muck. The aforementioned results are used to propose prediction formulas for tunnel muck SCS in different hydrous states.

Key words: tunnel muck, point load, saturated compressive strength, rapid evaluation

谢京谕, 李化建, 王振, 黄法礼, 易忠来. 基于点荷载的隧道洞渣饱和抗压强度快速评价方法[J]. 隧道建设, 2023, 43(7): 1161-1169.

XIE Jingyu, LI Huajian, WANG Zhen, HUANG Fali, YI Zhonglai. A Rapid Evaluation Method for Saturated Compressive Strength of Tunnel Muck Based on Point Load[J]. Tunnel Construction, 2023, 43(7): 1161-1169.

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[2]	王彬, 李苍松, 蔡建华, 史永跃, 王彦杰, 张涛. 岩石里氏硬度值与单轴饱和抗压强度相关性分析初步探讨[J]. 隧道建设, 2020, 40(S2): 174-179.

基于点荷载的隧道洞渣饱和抗压强度快速评价方法

A Rapid Evaluation Method for Saturated Compressive Strength of Tunnel Muck Based on Point Load

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