Method of Real-Time Calculation of Tunnel Access Zone Luminance Based on Solar Irradiance

NI Zhikai; ZHANG Di; WANG Shaofeng; XUE Peng; XIE Jingchao; LIU Jiaping

doi:10.3973/j.issn.2096-4498.2024.06.015

Tunnel Construction >

2024 , Vol. 44 >Issue 6: 1283 - 1293

DOI: https://doi.org/10.3973/j.issn.2096-4498.2024.06.015

Method of Real-Time Calculation of Tunnel Access Zone Luminance Based on Solar Irradiance

NI Zhikai ,
ZHANG Di ,
WANG Shaofeng ,
XUE Peng ,
XIE Jingchao ,
LIU Jiaping

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(1. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China; 2. China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, Hubei, China; 3. State Key Laboratory of Western Green Building, Xi′an University of Architecture and Technology, Xi′an 710055, Shaanxi, China)

Online published: 2024-07-12

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Abstract

The luminance L₂₀(S) varies considerably from time to time throughout the day and obtaining its value in real-time during urban tunnel operations is challenging. Thus, the authors propose a real-time calculation method that takes solar illuminance as the input variable and couples the sky and ground scene luminance into L₂₀(S) in combination with a three-dimensional (3D) printed tunnel scaled model. The Luhua road tunnel in Beijing is taken as the measurement object. A 3D printed tunnel scaled model is used instead of an actual tunnel to explore the change rule of ground scene luminance, and a quantitative regression model of ground scene luminance and solar illuminance is established. The calculated values from the International Commission on Illumination(CIE) and Perez models are compared with the measured values based on solar illuminance in the present study. The CIE model with a smaller error and easier calculation is determined as the sky luminance. The error rates are 4.26% and 6.11% under sunny and cloudy conditions, respectively. The average error rate of the calculated values of the coupled L₂₀(S) calculation model and the measured values in different seasons and weather conditions is below 10%, demonstrating the accuracy and applicability of the realtime calculation method for tunnel access zone luminance in all seasons and weather conditions.

Key words： tunnel access zone luminance; three-dimensional printed tunnel scaled model; solar illuminance; tunnel lighting

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NI Zhikai , ZHANG Di , WANG Shaofeng , XUE Peng , XIE Jingchao , LIU Jiaping . Method of Real-Time Calculation of Tunnel Access Zone Luminance Based on Solar Irradiance[J]. Tunnel Construction, 2024 , 44(6) : 1283 -1293 . DOI: 10.3973/j.issn.2096-4498.2024.06.015

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