宝兰客专第三系泥岩物性参数与力学特性研究

Abstract
Figure/Table
References
Related Citation (2)

Download: PDF (1509 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Research purposes: Tunnel construction in expansive strata is a difficult engineering problem. Based on the expansion and groundwater test of the Beiershilipu tunnel in Baoji-Lanzhou High-speed Railway, an in-depth study of soil expansion characteristics of mud stone is conducive to determining the influence of mud stone expansion on the track deformation of tunnel and improving tunnel design theory.
Research conclusions: (1) Tertiary mud stone has weak expansibility. (2) The elastic modulus, uniaxial compressive strength, uniaxial tensile strength and triaxial compressive strength of expansive rock decrease significantly after soaking, and the decreasing rates of each strength gradually decrease with the increase of soaking time. (3) The uniaxial compression tests show that the average uniaxial compressive strength decreases from 29.18 MPa to 4.65 MPa, decreasing by 84%, and the average elastic modulus decreases from 2.32 GPa to 0.85 GPa, decreasing by 63%. The Brazilian splitting tests show that the average tensile strength of the expansive rock decreases from 2.66 MPa to 0.36 MPa, decreasing by 86.5%. The triaxial compression tests show that the cohesive force of the expansive rock decreases significantly with the increase of immersion time, especially in the initial stage of immersion, from 5.82 MPa to 1.34 MPa, which decreases by 77%. However, the internal friction angle of the expansive rock decreases, but the decrease is not large, and the total decrease is 4.07% within 15 days of immersion. (4) The research results can provide reference for the design of railway tunnels similar to expansive mud stone.

Key words： Baoji-Lanzhou High-speed Railway expansive strata tertiary mud stone triaxial compressive strength uniaxial compressive strength

Received: 21 May 2024

PACS:

U441.3

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	JIN Baocheng
	WANG Xindong
	HE Siyue
	FU Yapeng
	HE Yongwang
	SHI Xianwei

Cite this article:

JIN Baocheng,WANG Xindong,HE Siyue, et al. Study on Physical Parameters and Mechanical Characteristics of Tertiary Mud Stone in Baoji-Lanzhou High-speed Railway[J]. Journal of Railway Engineering Society, 2024, 41(8): 30-38.

URL:

https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2024/V41/I8/30

[1]	郑胜章,郭岐山. 西宁地区泥岩地基的特性及常见问题分析[J]. 勘察科学技术, 2018(5): 1-4.Zheng Shengzhang, Guo Qishan.Characteristics and Analysis of Common Problems of Mudstone Foundation in Xining Area[J]. Site Investigation Science and Technology, 2018 (5): 1-4.
[2]	胡鹏飞, 骆行文, 卢正, 等.不同初始含水率砂质泥岩膨胀特性试验研究[J].公路, 2020(7): 256-261.Hu Pengfei, Luo Xingwen, Lu Zheng, etc. Experimental Research on Swelling Characteristics of Sandy Mudstone with Different Initial Water Content[J]. Highway, 2020(7): 256-261.
[3]	刘春刚. 青海地区泥岩膨胀特性与微观结构[J].科学技术与工程, 2023(19): 8384-8392.Liu Chungang.Swelling Characteristics and Microstructure of Mudstone in Qinghai Area[J]. Science Technology and Engineering, 2023(19): 8384-8392.
[4]	张建斌. 隧道周边泥岩遇水膨胀对隧道安全性的影响分析[J].铁道建筑技术, 2020(9): 50-52.Zhang Jianbin.Analysis of the Effect of Water Expansion of Mudstone Around Tunnel on Tunnel Safety[J]. Railway Construction Technology, 2020(9): 50-52.
[5]	王晨, 郭小龙. 膨胀性泥岩膨胀性试验研究[J].国防交通工程与技术, 2023(1): 37-40.Wang Chen, Guo Xiaolong.Experimental Study on Swelling Characteristics of Expansive Mudstone[J]. Traffic Engineering & Technology for National Defence, 2023 (1): 37-40.
[6]	张海霞,张福海,张文慧,等.青海省第三系泥岩的膨胀性和力学性研究[J].人民黄河,2005(1):54-55.Zhang Haixia, Zhang Fuhai, Zhang Wenhui, etc. Study on the Expansive and Mechanical Properties of Tertiary Mudstone in Qinghai Province[J]. Yellow River, 2005 (1): 54-55.
[7]	张献伟,洪开荣,常翔,等.第三系泥岩工程特性与仰拱施工技术研究[J].现代隧道技术, 2021(2): 214-219.Zhang Xianwei, Hong Kairong, Chang Xiang, etc. Study on the Engineering Characteristics of Tertiary Mudstone and Construction Technology of Inverted Arch[J]. Modern Tunnelling Technology, 2021(2): 214-219.
[8]	唐迎春, 黄钟晖, 张凯, 等.南宁第三系浅表层风化泥岩物理力学及膨胀特性指标分析[J].工程地质学报, 2014(1): 144-151.Tang Yingchun, Huang Zhonghui, Zhang Kai, etc. Physical Mechanical Indexes and Swelling Property of Weathered Tertiary Mudstone at Shallow Depth in Nanning[J]. Journal of Engineering Geology, 2014(1): 144-151.