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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

42卷

期数:

2025年02期

页码:

165-179

栏目:

桥隧工程

出版日期:

2025-03-20

文章信息/Info

Title:

Study on impact of crack properties on structural mechanics characteristics and safety performance of tunnel lining

文章编号:

1673-2049(2025)02-0165-15

作者:

路鑫^1,2,刘勇³,陈才⁴,高瑞丹⁵,王瑞成⁶,王亚琼³,王志丰³

(1. 长安大学 材料科学与工程学院,陕西 西安 710064; 2. 西安公路研究院有限公司,陕西 西安 710065; 3. 长安大学 公路学院,陕西 西安 710064; 4. 中交一公局西北工程有限公司,陕西 西安 710199; 5. 长沙理工大学 交通学院,湖南 长沙 410114; 6. 中国能源建设集团山西省电力勘测设计院有限公司,山西 太原 030001)

Author(s):

LU Xin^1,2, LIU Yong³, CHEN Cai⁴, GAO Ruidan⁵, WANG Ruicheng⁶, WANG Yaqiong³, WANG Zhifeng³

关键词:

隧道工程;  衬砌裂缝;  安全系数;  受力特征

Keywords:

tunnel engineering;  lining crack;  safety factor;  mechanics characteristic

分类号:

TU311

DOI:

10.19815/j.jace.2023.08002

文献标志码:

A

摘要:

以陕西某高速公路隧道为背景,采用扩展有限元法建立带裂缝衬砌三维数值计算模型; 针对裂缝类型、裂缝位置、裂缝长度及裂缝分布范围影响下的衬砌结构力学状态进行定量分析,研究了带裂缝衬砌结构安全性能演变规律,并定量给出不同裂缝性状影响下的衬砌安全系数拟合公式。结果表明:衬砌结构带裂缝时受力处于非对称状态; 单一预设纵向裂缝处轴力随着裂缝长度增大而逐渐减小,弯矩随着裂缝长度增大而增大; 拱顶+拱肩、拱顶+拱腰、拱顶+拱肩+拱腰3种组合预设纵向裂缝条件下拱顶轴力受影响最明显,相比单一预设纵向裂缝轴力变化率分别为21.55%、-17.52%、13.45%; 环向裂缝影响下衬砌弯矩分布模式呈现“拱肩外凸,拱腰及边墙内凹,拱脚外凸”模式; 带纵向裂缝衬砌结构安全系数拟合曲线呈现由“W”形逐渐向“U”形过渡的趋势; 带环向裂缝衬砌结构安全系数拟合曲线呈现近似对称的波浪形分布。

Abstract:

Taking a highway tunnel in Shaanxi province as the background, a three-dimensional numerical calculation model of cracked lining was established using the extended finite element method. Quantitative analysis of the mechanical state of lining structures under the influence of crack types, crack locations, crack lengths, and crack distribution ranges was carried out. Furthermore, the evolution law of the safety performance of the lining structure with cracks was studied, and the fitting formula of the lining safety factor under different crack characteristics was quantitatively given. The result show that when the lining structure has cracks, the force is in an asymmetric state. The axial force and bending moment at a single preset longitudinal crack gradually decrease and increase with the length of the crack respectively. Under the preset longitudinal crack conditions of arch crown+arch shoulder, arch crown+arch waist, and arch crown+arch shoulder+arch waist, the axial force of the arch crown is most significantly affected. Compared with single preset longitudinal crack, the axial force change rates are 21.55%, -17.52% and 13.45%, respectively. The distribution pattern of lining bending moment under the influence of circumferential cracks presents a pattern of “convex arch shoulder, concave arch waist and side walls, convex arch foot”. The fitting curve of the safety factor of the lining structure with longitudinal cracks show a trend of transition from a “W” shape to a “U” shape. The fitting curve of the safety factor of the lining structure with circumferential cracks shows an approximately symmetrical wavy distribution.

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备注/Memo

备注/Memo:

收稿日期:2023-10-21
基金项目:陕西省交通科技项目(22-09K); 国家自然科学基金项目(52178310); 陕西省重点研发计划“揭榜挂帅”项目(2022JBGS3-08); 陕西省创新能力支撑计划项目(2023-CX-TD-35); 陕西省重点研发计划项目(2023KXJ-159)
作者简介:路 鑫(1986-),男,高级工程师,E-mail:405491870@qq.com。
通信作者:王志丰(1986-),男,工学博士,教授,博士生导师,E-mail:zhifeng.wang@chd.edu.cn。
Author resumes: LU Xin(1986-), male, senior engineer, E-mail: 405491870@qq.com; WANG Zhifeng(1986-), male, PhD, professor, E-mail: zhifeng.wang@chd.edu.cn.

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更新日期/Last Update: 2025-03-20