Author
Fei Ye
Bio: Fei Ye is an academic researcher from Chang'an University. The author has contributed to research in topics: Settlement (structural) & Shield. The author has an hindex of 3, co-authored 8 publications receiving 25 citations.
Papers
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TL;DR: Wang et al. as mentioned in this paper conducted a systematic study on the causes of highway tunnel defects, which revealed that lining cracks and water leakage are the most common defects in the highway tunnels of China.
46 citations
TL;DR: This study aims to establish a maintenance strategy that determines the timing, location, and methods adopted to repair a degraded tunnel with ageing models established with three failure modes—flexural capacity, convergence, and crack.
Abstract: The ageing and deterioration of road tunnels due to environmental factors are inevitable. Rational and appropriate maintenance methods are required to maintain safety. This study aims to es...
15 citations
TL;DR: Under the combined impacts of the operation time, design concept, and construction technology, extensive damage has occurred in tunnels built in China during the early stages of rapid development as mentioned in this paper, which is the case in many tunnels in the world.
Abstract: Under the combined impacts of the operation time, design concept, and construction technology, extensive damage has occurred in tunnels built in China during the early stages of rapid development. ...
8 citations
TL;DR: In this article, the effect of sodium aluminate set accelerator on the calcium leaching process in shotcrete has been investigated and a mathematical model was developed to solve for the changes in calcium ions concentration during the calcite extraction process.
8 citations
TL;DR: In this paper, the applications of grout types, materials, and ratios were summarized based on a statistical analysis of engineering cases, and the relationship among the basic grout performance and ratios was examined.
7 citations
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TL;DR: A novel deep learning‐based model, named You Only Look Once network v4 enhanced by EfficientNet and depthwise separable convolution (DSC; YOLOv4‐ED), is proposed, used as the backbone to improve the identification accuracy of indistinguishable defect targets in complex tunnel background and light conditions.
Abstract: Aiming to solve the challenges of low detection accuracy, poor anti‐interference ability, and slow detection speed in the traditional tunnel lining defect detection methods, a novel deep learning‐based model, named You Only Look Once network v4 enhanced by EfficientNet and depthwise separable convolution (DSC; YOLOv4‐ED), is proposed. In the YOLOv4‐ED, EfficientNet is used as the backbone to improve the identification accuracy of indistinguishable defect targets in complex tunnel background and light conditions. Furthermore, DSC block is introduced to reduce the storage space of the model and thereby enhance the detection efficiency. The experimental results indicate that the mean average precision, F1 score, Model Size, and FPS of YOLOv4‐ED are 81.84%, 81.99%, 49.3 MB, and 43.5 f/s, respectively, which is superior to the comparison models in both detection accuracy and efficiency. Based on robust and cost‐effective YOLOv4‐ED, a tunnel lining defect detection platform (TLDDP) with the capacity of automated inspection of various lining defects (i.e., water leakage, crack, rebar‐exposed) is built. The established TLDDP can realize the high‐precision and automatic detection of multiple tunnel lining defects under different lighting and complex background conditions of the practical in‐service tunnel.
55 citations
TL;DR: A novel non-periodic inspection policy is developed and the adaptability of several inspection scheduling functions with different degradation modes are investigated, indicating that the inspection scheduling function in the type of a convex function is the best and shortening the inspection interval is an effective measure to reduce maintenance cost and risk.
23 citations
TL;DR: In this article, a double-arch tunnel constructed through the expansion of the middle pilot heading from an existing single-tube tunnel was studied, and the variation characteristics of the surface subsidence, surrounding rock stress, and stress and strain of the partition wall and lining during the tunnel reconstruction and expansion were investigated.
Abstract: At present, there are an ever-increasing number of tunnel expansion projects in China. Studying the mechanical properties of the expanded tunnels is of great significance for guiding their safe construction. Through model testing and numerical simulation, the mechanical properties of a double-arch tunnel constructed through the expansion of the middle pilot heading from an existing single-tube tunnel were studied. The variation characteristics of the surface subsidence, surrounding rock stress, and stress and strain of the middle partition wall and lining during the tunnel reconstruction and expansion were investigated. The mechanism for transferring stress and strain between the left and right tunnel tubes was studied by a numerical simulation method. The results showed that the surface subsidence caused by the excavation of the left (i.e., the subsequent) tunnel tube was larger, and the maximum surface subsidence occurred at the right (i.e., the first) tunnel tube. The surrounding rock on the middle wall was the sensitive part of the tunnel excavation, the stress of the surrounding rock at the left spandrel of the right tunnel tube fluctuated and exhibited the most complex variation, and the stress of the surrounding rock at the right spandrel of the left tunnel tube exhibited the largest variation. The excavation of the left tunnel tube had a great influence on the forces of the middle partition wall and the lining structure of the right tunnel tube, the middle partition wall was subjected to eccentric compression towards the left tunnel tube, and the stress at the left spandrel under the initial support of the right tunnel tube exhibited complex variations. The excavation of the left and right tunnel tubes had a great influence on the stability of the surrounding rock, as well as on the force-induced deformation of the middle partition wall and the support structure, within the width of the single tunnel tube span behind the tunnel working face. Due to the different construction sequences, the stress and strain at the symmetric measurement points of the middle partition wall, as well as the left and right tunnel support structures, were very different.
13 citations
TL;DR: In this article , basalt fiber (BF) was used for the first time in an attempt to mitigate the deterioration effect of calcium leaching on the physical and mechanical properties of concrete.
13 citations