bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study of Freezing Scheme in Artificial Horizontal Ground Freezing Method in Multi-lane Road Tunnel Based on Numerrical Simulation of Temperature Field
Authors: Zhang Jun 
Published: March 2020

Abstract
Artificial ground freezing method to form a frozen soil wall to cut off water and resist the soil pressure before excavation, was rarely used in Bangladesh such a vast hilly area. In this paper, connecting channel construction in Multi-lane Road Tunnel under the River Karnaphuli Chittagong – Bangladesh which is proposed to be constructed by double-row-ring freezing method, is taken as the study object. Taking the development of temperature field, the resisting ability of frost wall to thermal disturbance resulted from excavation, analysis of different freezing condition by numerical simulation is carried out for active and maintaining freezing stages, so that some guidance could be given for the final selection of freezing scheme. The results show that the design and construction scheme were reasonably practicable.
The Setting of Road Tunnel Cross Passages Based on Risk Analysis
Authors: Liu Shuai , Ding Hao , Pan Yong , Bin Li , Li Wei , Lü Lianghong 
Published: March 2020

Abstract
Cross passages are critical infrastructure for evacuation and rescue in fire accidents of road tunnels. Reasonable cross channel design is conducive to improving the efficiency of evacuation and rescue. In this paper, a key parameter setting method of highway tunnel cross-passages based on risk assessment is established. Aiming for safe evacuation of people and vehicles in the tunnel, this method is based on risk evaluation and involves comprehensive analysis of the effects of tunnel properties, traffic conditions, cross passage parameters and evacuation guidance measures so as to support the development of an optimum design of cross passages. This paper describes in detail its design approach, parameter determination process and risk evaluation method and taking an actual tunnel as example, demonstrates the process of determining key parameters of tunnel cross passages on the basis of risk evaluation.
Road Tunnel Detection Robot and Method Based on Laser Point Cloud
Authors: Li Wenfeng , Liu Yulei , Ke LI , Peng Yong , Ding Hao , Liu Qiu-zhuo 
Published: March 2020

Abstract
The maintenance of road tunnels is more important, and there are problems such as water seepage, surface cracking and falling off. If it cannot be detected and handled in time, it will pose a major threat to the driving safety of road vehicles. Therefore, this paper proposes a road tunnel defect detection scheme based on laser point cloud. Firstly, a robot for road detection is developed. Secondly, a road defect detection method based on laser point cloud is developed. Laser SLAM technology is used to reconstruct dense point clouds in road tunnel scenes. Finally, through the automatic detection of the three-dimensional reconstruction scene of the tunnel, the defects such as cracks and spalling of the road tunnel are automatically identified. Compared with the visual detection scheme, this method does not depend on the problem of ambient light and has better robustness and practicability.
Investigation of Deformation Influence on Throat Area of Highway Tunnel across the railway station
Authors: Li Pinpin , Huang Haiyun , Qiu Wenge 
Published: March 2020

Abstract
In order to ensure that Baishiyi Tunnel, an control project passing through Zhongliang Mountain, successfully passes through the throat area of the North Railway Station, track deformation control standard is established (Vertical differential settlement≤3.5mm, subgrade settlement≤3.5mm). Based on survey data, engineering analogy and numerical simulation, the influence of different excavation procedures on the ground settlement and track structure deformation is analysed. The result shows the ground settlement and trend of the measurement points at the corresponding positions of the tunnel and track structure are basically the same. The maximum ground settlement above the left line tunnel is 7.0mm, and the minimum ground settlement is 2.4mm. The ground directly above the grain dedicated line is a key part to be paid attention to in settlement control.
Review on the Development Status of Tunnel Refractory Technology Research
Authors: Song Shengyou , Xi Yang 
Published: March 2020

Abstract
With the economic development and technological innovation, the number of domestic tunnels has increased year by year. Because the tunnel structure is a closed and narrow structure, the loss of life and property caused by the fire is very serious. The manuscript summarizes the current status of the development of tunnel structure fire prevention technology. It introduced the development of fire protection technology for tunnel structures, fire protection technology for concrete composite structures, and fire resistance of fireproof coatings for fireproof panels, and summarized and prospected the current fire protection technology.
Study on the Limit Value of Safety Overburden Layer Thickness of Large-Span Bias Tunnel
Authors: Guo Hongyan , Liu XinRong , Like  , Cui Xiangyang 
Published: March 2020

Abstract
The number of mountain tunnels continues to increase, the explosive demand for traffic increases, and large-span bias tunnels are increasingly appearing in actual projects. Large-span biased tunnels can cause uneven lining stress, and unreasonable thickness of the soil can cause damage to the lining. This paper relies on the Beijing-Hong Kong-Macao Expressway Guangle Expressway. It adopts three construction methods, namely, double-wall method, three-step method and CRD method. At the same time, based on different soil thickness research, it is considered in 1:1, 1:2, 1: 3 Three kinds of slope effects, through the analysis of finite element numerical simulation results, the thickness limits of large-span bias tunnels under different slopes are given. The results show that the tunnel lining is under pressure within the thickness limit of the overburden. If it is too thin, it will cause the lining to be pulled and affect the stability of the tunnel. If it is too thick, it will increase the construction cost and waste. Therefore, the research on the thickness limit of large-span biased soil has a great guiding significance for design and construction.
Experimental Study on Mechanical Property of Highly Weathered Tuff for High-altitude Tunnel
Authors: Ke Li , Hongyan Guo , Hengxiang Song , Chen Jiabao 
Published: March 2020

Abstract
In the context of Milashan Tunnel in predominantly tuff whose mechanical property quickly deteriorates when in contact with water, it is necessary to study through lab test the creep property of highly weathered tuff surrounding the high altitude tunnel. This paper covers reconstruction of standard specimen with measurements of tuff dry density, natural water content and particle grading curve; analysis of axial stress and strain curves based on triaxial compression test; plotting failure stress circle to obtain tuff strength parameters c and φ; obtaining tuff rheological parameters from triaxial rheological test; deriving creep process curve by multi-specimen method; simulation of its rheological characteristics using Burgers model; and lastly identifying rheological parameters using MATLAB. It provides basic data to study deformation mode and monitoring measurement in actual construction.
Development and Application of Portable Intelligent Warning System for Safe Tunnelling
Authors: Ding Hao , Guo Hongyan , Li Ke , Ma Jianyun 
Published: March 2020

Abstract
With the emphasis on the construction of transportation infrastructure and the continuous advancement of county-level expressways’ “all-access and full-passage”, as well as the continuous improvement of water environmental protection during the construction process, especially in mountainous areas, the ratio of highway bridges to tunnels is getting higher and higher, tunnel engineering The construction is implemented as a control project in the construction of the highway. The combination of monitoring and measurement work has played an important role in all aspects of the tunnel construction, especially in terms of project quality, engineering cost, and progress. Monitoring and measurement should be implemented. Pay attention to the design of construction organization. As we all know, tunnel engineering is a kind of underground engineering, which itself has many characteristics such as complexity, concealment, and unmeasurability. There are many problems such as unpredictability in the development of the tunnel itself. During the construction process, the poor geological environment will not only cause problems to the technicians, but also cause the tunnel collapse, water inrush, etc., and even cause life to the construction personnel in severe cases. Hazards, thereby affecting the normal operation of the construction, causing delays in the construction period, and other issues, which will have a huge economic impact on the project. With the skillful application of monitoring and measurement, the problems existing in tunnel engineering can be predicted, so as to solve the problems and finally determine the design scheme. The application of monitoring and measurement in China’s highway tunnels is essential. Due to its concealment and the complexity of engineering geology, tunnel construction safety accidents occur frequently. Monitoring and measurement are important means of tunnel construction safety guarantee, and its informatization and intelligence are inevitable trends for future development. The article analyzes key technical issues. Proposed a reasonable solution, compiled a reasonable positioning early warning algorithm, developed an intelligent early warning system for tunnel construction safety and a portable wearable device, and successfully applied it in multiple tunnels, achieved good application results, and achieved intelligent monitoring of tunnel construction safety Visualization and visualization.
Development and Implementation of Structural Safety and Typical Distress Long Term Monitoring Technology for Operating Tunnels
Authors: Jin Fei , Guo Hongyan , Li Ke , Ma Fei , Su Junwei 
Published: March 2020

Abstract
With rapid development of transport infrastructure in China, expressway tunnels had exceeded 17, 000km by 2018. Tunnel projects are entering operation and maintenance periods. Tunnel operation and maintenance face serious distresses that compromise operation safety. It is urgent to develop long-term monitoring technology of tunnel structure safety and typical diseases, and develop relevant products to ensure the safety of tunnel operation. In this paper, a long-term monitoring system for operating tunnel structural safety and typical diseases is developed by analyzing the characteristics of tunnel diseases and studying the key technical problems of long-term online monitoring for structural safety. It has achieved good engineering application results, realized long-term online monitoring and early warning for operating tunnel structural safety and typical diseases, and ensured the safety of tunnel operation.
Study on Features of Hazardous Goods Transport Accidents on Highway
Authors: Xia Yangyuyu , Ma Fei , Liao Haomiao , Liao Zhipeng 
Published: March 2020

Abstract
This paper presents a collection of 202 hazardous goods transport accidents on road and analyses of time and spatial distribution features, inducements and forms of these accidents. The analyses results show: Frequent hazardous goods accidents occur in June and July and in the period of 8:00-10:00 each day; most accidents occur on an expressway, leading to more serious consequences if they occur inside a tunnel; major causes of hazardous goods accidents are drivers’ misoperation and vehicle fault; leakage is the most common form of accident; explosions and fires cause the most serious consequences; flammable liquid, flammable gas and toxic chemicals are three substances most commonly seen in hazardous goods accidents. At the end of this paper, a number of targeted recommendations are provided to prevent hazardous goods transport accidents based on the above results.
Analysis of the Influence of New Parallel Tunnels on the Safety of Existing Highway Tunnels
Authors: Fang Yonggang , Dong Xiqiang , Feng Jin , Ma Zhuoqian , Ma Zhe , Ding Hao 
Published: March 2020

Abstract
With the increasing number of construction projects in China, the intersection or proximity between new tunnels and existing tunnels is increasing. How to evaluate the impact of existing tunnels and ensure the safe operation of existing tunnels are important issues to be considered in the design of new tunnels. Based on the actual conditions of the new tunnel and the existing Jianshi tunnel of Jinliwen Expressway in the north connection of S49 provincial highway in Zhejiang Province, this paper studied the influence of the new parallel tunnel on the existing highway tunnel by analyzing the net distance between the two tunnels, the change of the supporting structure during the construction of the new tunnel and the vibration caused by the blasting construction, etc., the influence of new parallel tunnels on the safety of existing highway tunnels was studied, which provides a reference for the design and construction of similar short distance parallel tunnels.
Study on Reasonable Combination of Retaining Structure and Main Structure for Tunnel Shaft in the Offshore Environment
Authors: Jin Li 
Published: March 2020

Abstract
Through the investigation, the design of the combination of the retaining structure and the main structure of the large-diameter shield shaft was summarized. Combined with the characteristics of the offshore shaft, considering the difficulty in implementing underwater pouring of high-grade underground diaphragm wall, through reasonably analyzing the characteristics of chloride environmental corrosion, a reasonable solution of supporting the temporary diaphragm wall to participate in anti-floating action is proposed. For the strictness of crack control in the chloride environment, it is proposed to use the frame beam as the purlins in the excavation stage, and the waterproof problem of the construction joint is better solved. Finally, the three-dimensional calculation results confirm the stress of lining wall is reasonable.
Research on the Mechanical Response of Tunnel Structure under Water Softening Surrounding Rock
Authors: Qian Kun , Wang Xiaoming , Zhu Rongqing , Ding Wenqi 
Published: March 2020

Abstract
The state of water content is an important factor affecting the mechanical properties of rock. After the tunnel excavation, due to the formation of the loosening circle and the increase of the seepage path, the state of water content of the surrounding rock changes, making the mechanical properties of the surrounding rock soften with water. In this paper, the types and principles of water rock interaction are described. Taking a tunnel in Southwest China as the research object, through numerical simulation, the results of lining and surrounding rock before and after the softening are compared, and the mechanical response law of the lining and surrounding rock during tunnel excavation is discussed.
Research on Safety Evaluation Method of Tunnel Visual Environment
Authors: Zhang Qi 
Published: March 2020

Abstract
Starting from the driver’s visual features, safety evaluation indicators and methods of tunnel visual environment are proposed against the tunnel visual environmental characteristics, providing scientific guidance for special lighting environment in the tunnel to increase visual stimulation, transforming previous subjective evaluation into quantitative evaluation and thus improving tunnel traffic safety level effectively. The method can also be extended to the safety evaluation of other scenarios such as tunnel decoration and light color temperature.
Optimization of construction parameters of Highway Tunnel CRD Method
Authors: yuwen Wang , kaicheng Hua , Ke Li , Hongyan Guo , Xiangyang Cui 
Published: March 2020

Abstract
For shallow buried tunnels with poor surrounding rock stability, reasonable construction parameters are of great significance for ensuring tunnel construction safety and controlling construction quality. Taking Huiqing a tunnel as an example, comprehensive analysis of the partition wall R=11.6 ∠ 520, R=5.76 ∠1060, R=5.46 ∠1040, R=+∞∠1800 three different radii of curvature, using FLAC software for four calculations Numerical simulation of working conditions, analysis of plastic zone changes and surrounding rock deformation under different calculation conditions, and the radius of curvature of this project is proposed. The research results show that the middle partition wall adopts R=5.76 and the central angle=1060 can ensure the stability of surrounding rock and the minimum deformation of surrounding rock, which can provide a certain reference for the construction of such highway tunnels.
“Human-Vehicle-Tunnel-Environment” Based Study on Key Issues and Solutions of Operation and Maintenance Risk Evaluation for Urban Road Tunnels
Authors: Ding Hao , Ma Fei , Xia Yangyuyu , Liao Zhipeng 
Published: March 2020

Abstract
This paper provides analyses of operating environment features of urban tunnels in building, traffic, hydrology, vertical alignment, social environment and examination of key issues in operation and maintenance risk evaluation for urban tunnels: diversity and complexity of evaluation factors; timeliness of evaluation result; uncertainty of rating, etc. Relevant countermeasures are proposed for the above-mentioned key issues, including information collection technology based on the Internet of big data technology and risk dynamic assessment and management platform, etc., to provide a solution path for the real-time, intelligent and informatization of urban tunnel risk management and control.
Finite Element Analysis of the Influence of Deep Foundation Pit Excavation Construction on Adjacent Subway Tunnel Structure
Authors: Li Guangping , Xi Weizheng 
Published: March 2020

Abstract
Foundation pit excavation construction is a widespread underground engineering activity in urban construction. More and more foundation pit projects are adjacent to existing subway tunnels. Through the engineering example, the thesis analyzes the influence of deep foundation pit construction supported by double-row piles on the structural safety of adjacent subway tunnels. Firstly, the risks of the project are analyzed, and then the structural safety control standard is determined according to similar engineering and related specifications. On this basis, the finite element numerical simulation software is used to calculate and analyze the deformation and force of the subway tunnel structure during the foundation pit construction, and the safety impact of the subway tunnel structure during the foundation pit construction is evaluated.
Application and Prospect of New Steel Corrugated Plate Technology in Infrastructure Fields
Authors: Wang Xingping , Wang Zhijie , Guo Chun , Han Yu , Zhao Jianhua , Lu Nan , Tang Huizhi 
Published: March 2020

Abstract
This paper systematically analyses the application status and advantages of steel corrugated plate and it’s composite structure technology in domestic and foreign infrastructure construction, such as in the tunnel fields. From the aspects of Engineering characteristics, environment and energy saving, etc. We put forward the research ideas, development prospects and application ideas of steel corrugated plate technology in the field of infrastructure.
Study on Temperature Control of Ventilation System in Construction Period of High Ground Temperature Tunnel
Authors: Zhang Zengwei , Chen Fan , Yang Song , Ai Zubin , Cao Zhensheng , Mou Qibo 
Published: March 2020

Abstract
As China’s infrastructure continues to advance, tunnels will encounter increasingly complex geological conditions during construction. High geothermal heat seriously affects not only the normal construction of tunnels but also the physical and mental health of construction workers. Due to the existing cooling measures have poor effect and high energy consumption, so the cooling effect of the ventilation system is neglected. This paper studies the influence of ventilation system on the temperature inside the tunnel under different air supply volumes, and the distribution of temperature inside the tunnel. The numerical results show that the ambient temperature in the tunnel decreases gradually with the increase of air supply volumes at the same air temperature, but it will not change with the increase of air supply at a certain temperature. This study provides the theoretical basis for optimizing the ventilation and cooling system, it will provide a better construction environment for tunnel workers.
Construction of a large-section long pedestrian underpass using pipe jacking in water-filled clay
Authors: Wang Lishuai , Kong Chao , Peng Feng , Zhang Baobao , Deng Jiqing , Gu Song , Sun Quan 
Published: March 2020

Abstract
This paper presents a design and construction schemes of a pipe jacking project in Kunming, China in detail. The underpass, having a width of 6.9 m and a height of 4.9 m, was jacked 46m in water-filled clay under a busy viaduct with 4.5 m overburden soil., Some adjustments have been made to the construction process due to the characteristics of the soil layer, the surrounding environment and the existing pipeline. During the whole construction process: the pipe jacking passes through the shallow confined aquifer with high water content and high void ratio, it is easy to produce rheology. In addition, the attitude control of whole tube is also a difficulty, and some adjustments have been made to this problem; the monitoring scheme has also been adjusted accordingly. In general, this project is completed successfully and the traffic on ground and viaduct runs well during the whole construction process.
Study on the Seismic Response of Long and Large Tunnel under Non-Uniform Excitations
Authors: Zhang Xiwen , Zhu Weidong , Liu Yan , Tang Jian 
Published: March 2020

Abstract
In recent years, the underground tunnel engineering has developed rapidly, moving towards long, large, deep, new and complex structures. The seismic design of the tunnel should consider not only the conventional consistent excitation, but also the response of the non-uniform seismic excitation to the tunnel. Taking the actual Yellow River tunnel project as an example, the non-uniform seismic excitation analysis method is used to study the lateral and longitudinal seismic responses of the super-large tunnel, and the deformation characteristics of the top, bottom and waist of the tunnel are analysed. The study found that the longitudinal deformation and mechanical behavior of long tunnels are characterized by non-uniformity, inhomogeneity and asymmetry. Under the non-uniform excitation, the maximum response displacement of the top, bottom and waist of the tunnel section is larger than the displacement under the uniform action. Therefore, during the design of long tunnels, longitudinal seismic deformation should be emphasized, and the study of non-uniform load effect should be strengthened.