季冻区隧道导流明洞及其防寒效果研究

赵立财; 王瑞; 殷珂; 马甲宽; 李良广

doi:10.3973/j.issn.2096-4498.2023.02.006

隧道建设 >

2023 , Vol. 43 >Issue 2: 248 - 256

DOI: https://doi.org/10.3973/j.issn.2096-4498.2023.02.006

研究与探索

季冻区隧道导流明洞及其防寒效果研究

赵立财 ,
王瑞 ,
殷珂 ,
马甲宽 ,
李良广

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(1. 中铁十九局集团第三工程有限公司，辽宁沈阳〓 10136； 2. 长安大学建筑工程学院，陕西西安 710061)

赵立财（1985—），男，辽宁盖州人，2020年毕业于天津大学，能源与环保专业，博士,正高级工程师,主要从事爆炸力学、桥梁与隧道智能建造与灾变防治理论研究工作。Email: zhaolicai1314@foxmail.com。*通信作者：王瑞， Email: wr2801100103@163.com.cn。

网络出版日期: 2023-03-22

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Flow Guide Open Tunnel and Its ColdProof Effect of Tunnel in Seasonal Frozen Regions

ZHAO Licai ,
WANG Rui ,
YIN Ke ,
MA Jiakuan ,
LI Liangguang

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(1. China Railway 19th Bureau Group Third Engineering Co., Ltd., Shenyang 110136, Liaoning, China; 2. School of Civil Engineering, Chang′an University, Xi′an 710061, Shaanxi, China)

Online published: 2023-03-22

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摘要

为弱化季冻区自然气象条件对隧道冻害的影响，基于流体力学基本原理和冷/热量累积理念，提出一种高效环保的新型导流明洞结构，并通过ANSYS-Fluent数值模拟验证导流明洞的防寒效果。研究结果表明： 1)当寒冷气流方向与隧道横向夹角介于15°~75°，提出的导流明洞可显著降低进入隧道寒流的风速； 2)当夹角不超过45°, 导流明洞可基本隔绝外部冷空气的流入； 3)当夹角超过45°，隔绝效果随着夹角的增大逐渐减弱，但始终明显优于传统明洞。本工程研究背景下，不设置导流明洞时，隧道负温区长度超过1 000 m；设置导流明洞后，隧道负温区基本消失，防寒效果显著。

关键词： 季冻区; 隧道; 冻害; 导流明洞; 防寒效果; 流体力学; 数值模拟

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赵立财 , 王瑞 , 殷珂 , 马甲宽 , 李良广 . 季冻区隧道导流明洞及其防寒效果研究[J]. 隧道建设, 2023 , 43(2) : 248 -256 . DOI: 10.3973/j.issn.2096-4498.2023.02.006

Abstract

A new structure of flow guide open tunnel is proposed to minimize the influence of natural meteorological conditions on the frost damage of tunnels in seasonal frozen areas. This structure is designed based on the basic principle of fluid mechanics and the concept of cold/heat accumulation, which is efficient and environmentally friendly. Moreover, the coldproof effect of flow guide open tunnel is validated using ANSYSFluent numerical simulation. The results indicate the following: (1) When the angle between the cold air direction and the tunnel transverse direction ranges from 15° to 75°, the flow guide open tunnel can significantly reduce the velocity of cold flow entering the tunnel. (2) When the angle is less than 45°, the flow guide open tunnel can almost completely isolate the inflow of external cold air. (3) When the angle exceeds 45°, the insulation effect gradually weakens as the angle increases, but it still performs better than traditional tunnels. In the case study, it is found that without the flow guide open tunnel, the length of the tunnel with a temperature below 0 °C is over 1 000 m. However, after implementing the flow guide open tunnel, there is no area in the tunnel with a temperature below 0 °C, indicating a significant coldproof effect.

Key words： seasonal frozen area; tunnel; frost damage; flow guide open tunnel; coldproof effect; fluid mechanics; numerical simulation

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