Characteristics of seismic disasters and aseismic measures of tunnels in Wenchuan earthquake

Lai, Jinxing; He, Siyue; Qiu, Junling; Chen, Jianxun; Wang, Lixin; Wang, Ke; Wang, Junbao

doi:10.1007/s12665-017-6405-3

Cited by 120 publications

(46 citation statements)

References 40 publications

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“…With the rapid development of the social economy, the present massive road infrastructure still fails to meet people's traveling demands [1][2][3][4][5] and traffic congestion has become a common phenomenon in the freeway. Especially, freeways often turn into parking lots during the holidays.…”

Section: Introductionmentioning

confidence: 99%

Traffic Flow Prediction during the Holidays Based on DFT and SVR

Luo

Zhang

2019

Journal of Sensors

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With the implementation of the freeway free policy during the holidays, traffic congestion in the freeway becomes a common phenomenon. In order to alleviate traffic pressure, traffic flow prediction during the holidays has become a problem of great concern. This paper proposes a hybrid prediction methodology combining discrete Fourier transform (DFT) with support vector regression (SVR). The common trend in the traffic flow data is extracted using DFT by setting an appropriate threshold, which is predicted by extreme extrapolation of the historical trend. The SVR method is applied to predict the residual series. The experimental results with measured data collected from the toll stations in Jiangsu province of China show that the proposed algorithm has higher accuracy compared with the traditional method, and it is an efficient method for traffic flow prediction during the holidays.

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Section: Introductionmentioning

confidence: 99%

Traffic Flow Prediction during the Holidays Based on DFT and SVR

Luo

Zhang

2019

Journal of Sensors

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“…Since there is a risk of intrusion of an overlying layer, horizontal jet-grouting technology has been increasingly used to create jet-grouting umbrellas for protecting excavations and reducing surface settlements [4,[26][27][28][29][30][31]. As jet grouting involves the injection of large volumes of water or grout into the soil, inevitable disturbance of the surrounding soil will occur, which may cause significant displacement of the ground [4,19,[32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Simple Method to Predict Ground Displacements Caused by Installing Horizontal Jet-Grouting Columns

Wang

Shen

Cheng

2018

Mathematical Problems in Engineering

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During the horizontal jet grouting in soft ground, injection of large volumes of water and grout into the soil can lead to significant ground displacements. A simple method is proposed in this paper to predict the ground displacements caused by installing horizontal jet-grouting columns. The process of installing a horizontal column is simplified as the expansion of a cylindrical cavity with a uniform radial stress applied at plastic-elastic interface in a half plane. In this study, the analytical solution is adopted to calculate the deformation induced by the expansion of a cylindrical cavity. Considering the main jetting parameters (jetting pressure of the fluid, flow rate of the fluid, and withdrawal rate of the rod) and the soil properties (stiffness of the surrounding soil), an empirical equation to estimate the radius of plastic zone is developed. Two field tests are carried out in Shanghai, China, to verify the correctness and applicability of the proposed method. Comparisons between the predicted and measured values indicate that the proposed method can provide a reasonable prediction. The proposed simple method can be recommended as a useful tool for the design of ground improvement by means of horizontal jet grouting.

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“…eoretically, by comparison with other kinds of urban garbage, C&D waste has high potential for having recycling and economic value, 80% of which may be reused [3][4][5]. However, to date, most of the C&D waste produced in China has been disposed by simple land lling or dumping, which in turn creates a potential risk that threatens the security of the ecology and sustainable development in the region [6][7][8][9]. As shown in Figure 1, the recycling rate in China was merely 9.5% in 2012, which was lower than the recycling rate of most EU countries [2].…”

Section: Introductionmentioning

confidence: 99%

Investigation into the Application of Construction and Demolition Waste in Urban Roads

Li¹,

Zhou²,

Su³

et al. 2017

Advances in Materials Science and Engineering

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e recycling and reuse of waste materials is a topic of global concern and great international interest for those interested in sustainable development and protecting the environment. In recent decades, global production of construction and demolition waste (C&D waste) has signi cantly increased and became a worldwide problem. is research proposes to evaluate the feasibility of using aggregate from recycled C&D waste for urban road embankment applications based on the Sanhuan road construction project in eastern Xi'an. An extensive suite of laboratory and eld compaction tests were carried out to determine the physical properties and engineering characteristics of the C&D waste. e e ect of curing on the strength of the C&D waste was investigated using uncon ned compression strength (UCS), California bearing ratio (CBR), and de ection tests. e results show that the C&D waste has the characteristics of high strength and signi cant stability after simple treatment and further suggest that the use of these materials for paving urban road embankments is feasible. is study is of value for the reasonable and e ective promotion of using C&D waste recycled materials in road subgrade applications.

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Characteristics of seismic disasters and aseismic measures of tunnels in Wenchuan earthquake

Cited by 120 publications

References 40 publications

Traffic Flow Prediction during the Holidays Based on DFT and SVR

Traffic Flow Prediction during the Holidays Based on DFT and SVR

Simple Method to Predict Ground Displacements Caused by Installing Horizontal Jet-Grouting Columns

Investigation into the Application of Construction and Demolition Waste in Urban Roads

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