开挖扰动及非达西渗流对隧道涌水的影响分析

Abstract
Figure/Table
References
Related Citation (2)

Download: PDF (604 KB) HTML (0 KB)
Export: BibTeX | EndNote (RIS)

Abstract Research purposes: The change of permeability coefficient caused by tunnel excavation disturbance and Non-Darcy seepage in the disturbed area are important factors affecting the prediction accuracy of tunnel water inrush. In order to improve the prediction accuracy of water inrush, a simplified calculation model of tunnel water inrush in the disturbed area is constructed. The calculation expressions of water inrush and external water pressure of the structure are deduced based on the theory of underground hydraulics, Non-Darcy's law and linear superposition principle, and the degradation analysis is carried out. After that, the sensitivity of characteristic parameters is studied. Finally, the rationality of the model and the correctness of formula derivation are tested by comparing with the field measured data.
Research conclusions: (1) The increase of the thickness and permeability coefficient of the disturbed area weakens the water blocking capacity of the surrounding rock, resulting in the increase of the water inflow of the tunnel. Improving the construction technology level and reducing the degree and scope of disturbance can weaken the variability of the permeability coefficient of the surrounding rock in the disturbed area, which has a positive effect on the water blocking during the operation period of the tunnel. (2) Properly improving the impermeability of the grouting ring can effectively reduce the water inflow of the tunnel, but with the increase of the impermeability of the grouting ring, the effect on the reduction of the water inflow of the tunnel tends to be gradual. (3) Considering the change of permeability coefficient of surrounding rock in disturbed area and the influence of Non-Darcy's seepage, the prediction error of water inflow can be reduced from 8.9% to 4.2%. (4) The research results can provide theoretical guidance for considering the influence of excavation disturbance on tunnel water inflow.

Key words： excavation disturbance Non-Darcy's law reflection method prediction of water inflow

Received: 24 September 2021

PACS:

U459.2

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	FU Helin
	AN Pengtao
	WU Yimin
	CHENG Guowen

Cite this article:

FU Helin,AN Pengtao,WU Yimin, et al. Analysis of the Influence of Excavation Disturbance and Non-Darcy Seepage on Tunnel Water Inflow[J]. Journal of Railway Engineering Society, 2022, 39(7): 80-85.

URL:

https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I7/80

[1]	Zhao Xin, Yang Xiaohua. Experimental Study on Water Inflow Characteristics of Tunnel in the Fault Fracture Zone[J]. Arabian Journal of Geosciences, 2019, 12(13):399.
[2]	张庆艳,陈卫忠,袁敬强,等.断层破碎带突水突泥演化特征试验研究[J].岩土力学,2020(6):1911-1922.Zhang Qingyan, Chen Weizhong, Yuan Jingqiang, etc. Experimental Study on Evolution Characteristics of Water and Mud Inrush in Fault Fractured zone[J]. Rock and Soil Mechanics, 2020(6): 1911-1922.
[3]	黄震,朱术云,赵奎,等.工程活动诱发的围岩结构变化对隧道突涌水的影响分析[J].岩土工程学报,2018(3):449-458.Huang Zhen, Zhu Shuyun, Zhao Kui, etc. Influences of Structural Variation of Host Rock Induced by Engineering Activities on Water Inrush of Tunnels[J]. Chinese Journal of Geotechnical Engineering, 2018(3): 449-458.
[4]	张丙强.半无限平面双孔平行隧道渗流场解析研究[J].铁道学报,2017(1):125-131.Zhang Bingqiang. Analytical Solution for Seepage Field of Twin-parallel Tunnels in Semi-infinite Plane[J]. Journal of the China Railway Society,2017(1):125-131.
[5]	曾凡辉,程小昭,郭建春.裂缝面非均匀流入的低渗透油藏压裂水平井非稳态产量计算[J].中南大学学报:自然科学版,2016(4):1353-1358.Zeng Fanhui, Cheng Xiaozhao, Guo Jianchun. Calculation of Unsteady Productivity of Fractured Horizontal Wells[J]. Journal of Central South University:Science and Technology,2016(4):1353-1358.
[6]	周建,蔡键,杨帆,等.注浆、衬砌作用下非线性渗流隧洞弹塑性解[J].哈尔滨工业大学学报,2021(3): 58-65.Zhou Jian, Cai Jian, Yang Fan, etc. Elastoplastic Solution of Tunnel with Non-linear Seepage under Grouting and Lining Support[J]. Journal of Harbin Institute of Technology, 2021(3):58-65.
[7]	陈辛波,岩附信行,林严,等.基于洛毕达极限法则的机构奇异位置运动分析[J].同济大学学报:自然科学版,2002(8):973-978.Chen Xinbo, Iwatsuki Nobuyuki, Lin Yan, etc. Kinematic Analysis at Singular Points of Linkages Based on L’Hospital’s Theorem[J]. Journal of Tongji University:Natural Science, 2002(8):973-978.
[8]	傅鹤林,安鹏涛,李凯,等.围岩非均质性对隧道突涌水的影响分析[J].岩土力学, 2021(6):1519-1528.Fu Helin, An Pengtao, Li Kai, etc. Analysis of Influence of Surrounding Rock Heterogeneity on Water Inrush in Tunnel[J]. Rock and Soil Mechanics, 2021(6):1519-1528.