大断面双层隧道改扩建施工力学行为研究

周宗青; 黄林祥; 雷明锋; 岳长城; 邱大鹏; 陈云娟

doi:10.20265/j.cnki.issn.1007-2993.2024-0338

大断面双层隧道改扩建施工力学行为研究

doi: 10.20265/j.cnki.issn.1007-2993.2024-0338

1.
山东大学齐鲁交通学院，山东济南　250002
2.
中铁十八局集团有限公司，天津　300222
3.
中南大学土木工程学院，湖南长沙　410083
4.
中铁十八局集团市政工程有限公司，天津　300222

基金项目: 国家自然科学基金（52208397；42172310；51709159）；山东省自然科学基金青年基金项目（ZR2021QE126）；山东省高等学校青年创新团队发展计划（2023KJ123）

详细信息

作者简介:
周宗青，男，1988年生，博士，教授。研究方向：隧道及地下工程建养。E-mail：Zongqing.Zhou@sdu.edu.cn

通讯作者:
邱大鹏，男，1992年生，博士，副教授。研究方向：隧道及地下工程施工。E-mail：qmxnirvana@126.com

中图分类号: U45
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- 文章访问数: 5
- HTML全文浏览量: 3
- PDF下载量: 0
- 被引次数: 0
出版历程
- 收稿日期: 2024-07-22
- 修回日期: 2024-09-08
- 录用日期: 2024-10-29
- 刊出日期: 2025-10-10

Reconstruct mechanical performance of double layered tunnel with large cross section

1.
School of Qilu Transportation, Shandong University, Jinan 250002, Shandong, China
2.
China Railway 18th Bureau (group) Co., Ltd., Tianjin 300222, China
3.
School of Civil Engineering, Central South University, Changsha 410083, Hunan, China
4.
China Railway 18th Bureau (group) Municipal Engineering Co., Ltd., Tianjin 300222, China

摘要

摘要: 随着经济的持续增长，部分现有隧道已难以满足当前的交通需求，为了确保交通的顺畅与安全，需合理地对隧道进行改扩建。基于ABAQUS有限元软件建立隧道围岩–衬砌三维模型，结合生死单元法模拟了某四联拱隧道扩挖为大断面双层隧道的开挖过程，得到每个步序下围岩的应力应变云图及衬砌塑性区分布特征，并将前后结果进行对比分析，确定了隧道结构的受力薄弱部位，对工程开挖过程中结构的力学行为表现进行预估。研究表明，本项目所采取的施工工序安全合理，隧道结构在力学行为上表现良好，工程的安全性和经济性得到了保障。
- 隧道工程 /
- 改扩建 /
- 数值模拟 /
- 有限元分析 /
- 力学行为
Abstract: With the continuous growth of the economy, some existing tunnels are no longer able to meet the current transportation needs. To ensure smooth and safe traffic, it is necessary to carry out reasonable renovation and expansion projects on the tunnel. This research is based on the ABAQUS finite element software to establish a three-dimensional model of the tunnel surrounding rock lining. The excavation process of the tunnel was simulated using the life and death element method. The stress-strain cloud map of the surrounding rock and the distribution characteristics of the plastic zone of the lining were obtained for each step, and the results before and after were compared and analyzed. The weak stress areas of the tunnel structure were determined, and the mechanical behavior of the structure during the excavation process was predicted in advance. The results revealed that the construction process adopted in this project is safe and reasonable, the tunnel structure performs well in mechanical properties, and the safety and economy of the project are guaranteed.
- tunnel engineering /
- renovation and expansion /
- numerical simulation /
- finite element analysis /
- mechanical performance

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图 1 象山隧道位置示意图

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图 2 象山隧道改建示意图

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图 3 象山隧道改建工程数值模型

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图 4 隧道模型（单位：m）

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图 5 围岩最大应力分布

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图 6 围岩竖向位移分布

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图 7 衬砌受拉损伤分布

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图 8 衬砌最大应力分布

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图 9 衬砌最大应变分布

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表 1 材料本构模型及属性

材料	本构模型	输入参数	数值
混凝土	CDP	密度/(kg·m^–3)	2400
		弹性模量/GPa	32.5
		泊松比	0.20
		膨胀角	30
		偏心率	0.10
		K	0.666
		拉伸屈服强度/MPa	3
		压缩屈服强度/MPa	30
土体（土层2）	DP	密度/(kg·m^–3)	1960
		弹性模量/MPa	363
		泊松比	0.30
		膨胀角	14.5
		黏聚力/kPa	300

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参考文献(12)

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