Vibration Response Characteristics of the Cross Tunnel Structure

Lai, Jinxing; Wang, Kaiyun; Qiu, Junling; Niu, F.; Wang, Junbao; Chen, Jianxun

doi:10.1155/2016/9524206

Cited by 91 publications

(51 citation statements)

References 28 publications

(28 reference statements)

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“…Meanwhile, the water intake point of west-route of the South-to-North Water Transfer Project is only dozens of kilometers away from Xinzhuangling tunnel, which will be unified with current irrigation system. On this occasion, the large increase of water will cause huge hidden danger for the safety of existential tunnels [37][38][39][40][41]. Therefore, performing the large-scale field soaking experiment near Xinzhuangling tunnel has great engineering significance.…”

Section: Description Of Test Fieldmentioning

confidence: 99%

Field Experiment on Soaking Characteristics of Collapsible Loess

Wang

Xie

Qiu

et al. 2017

Advances in Materials Science and Engineering

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In collapsible loess area, migration of soil moisture often causes the temporal discontinuity and spatial nonuniformity of collapsibility, which leads to great damage for infrastructures. Therefore, the research on water infiltration is the key to solving the problem of collapsibility. The aim of this paper is to investigate the spatiotemporal evolution of infiltration characteristics of collapsible loess. A field soaking experiment was conducted on collapsible loess in western China, in which a soaking pool with diameter of 15 m was built. Time-Domain-Reflectometry (TDR) system and soil sampling were employed to measure the water content within the depth of 12 m. Then the saturation isograms were drawn for visualization of the process of infiltration. Also, a pilot tunnel was excavated to investigate how the free face can affect the infiltration behaviors. The experimental results revealed the characteristics of infiltration in both horizontal and vertical directions. Moreover, the response of free face on infiltration behaviors was also found. These findings of research could provide the data for the infiltration laws of unsaturated loess and thereby provide the basis for integrated treatment of collapsible loess.

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Section: Description Of Test Fieldmentioning

confidence: 99%

Field Experiment on Soaking Characteristics of Collapsible Loess

Wang

Xie

Qiu

et al. 2017

Advances in Materials Science and Engineering

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“…Root piles have their own distinct advantages. In some specific cases, root piles are likely to be the only effective solution; however, some problems still need to be discussed related to their research and application, as follows: (1) Root piles generally use filling pile calculation methods; however, the principal method of bearing the root pile is by the lateral friction of pile, and the designed calculation method remains defective. More calculation methods exist for root piles; however, the geological conditions under different methods and the determination of suitable design techniques for specific conditions need further investigation.…”

Section: Summary and Perspectivesmentioning

confidence: 99%

“…In mountainous areas, tunnels can be used to address problems related to terrain or elevation, improve alignment, shorten mileage, save time, and reduce the destruction of vegetation. In urban areas, they can reduce the land on ground and actively take part in traffic dispersion; in rivers, straits, harbours, and other areas, tunnels exert no influence on waterway navigation, improve comfort, increase concealment, and are not affected by climate [1][2]. With the development of tunnel and subway shield engineering, the foundation treatment becomes an essential aspect of any project.…”

Section: Introductionmentioning

confidence: 99%

Development and Prospect of Root Piles in Tunnel Foundation Reinforcement

Ding¹,

Su²,

Lai³

et al. 2017

CEJ

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Over the past couple of decades, root piles as the new tool for addressing a number of tough problems have been gaining a continually increasing interest in tunnel, especially for complex geological conditions. Therefore, in order to promote the development and application of root piles in tunnel engineering, this paper systematically sorts out the research status and development prospect of root piles from the application in foundation underpinning to reinforcement of tunnel foundation. Firstly, the type and development process of root piles are discussed. Secondly, the reinforcement mechanism of the root piles in the tunnel base is refined and combed: the reinforcement mechanism analysis focuses on frictional resistance of soil around pile, soil among piles, and piles. Thirdly, the calculation method of reinforced tunnel foundation is studied from the bearing of vertical load, horizontal load and pile reinforcement design. And through the engineering case, the paper illustrates the reinforcement effect of the root pile in ensuring the stability of the tunnel and the concrete process of the root piles in the tunnel construction. Finally, the problem and development prospect of root piles are discussed, so as to provide new perspectives and fundamental data for the research on tunnel engineering.

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“…Therefore, the 10-fold cross-validation will be conducted 10 times to validate the model. In summary, the process of travel mode selection model based on the Bayesian network combining mutual information and expert knowledge is presented in Figure 2 [42][43][44][45][46].…”

Section: Bayesian Network Model Validationmentioning

confidence: 99%

A Bayesian Network Model on the Public Bicycle Choice Behavior of Residents: A Case Study of Xi’an

Wang

Sun

Zhang

2017

Mathematical Problems in Engineering

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In order to study the main factors affecting the behaviors that city residents make regarding public bicycle choice and to further study the public bicycle user's personal characteristics and travel characteristics, a travel mode choice model based on a Bayesian network was established. Taking residents of Xi'an as the research object, a K2 algorithm combined with mutual information and expert knowledge was proposed for Bayesian network structure learning. The Bayesian estimation method was used to estimate the parameters of the network, and a Bayesian network model was established to reflect the interactions among the public bicycle choice behaviors along with other major factors. The K-fold cross-validation method was used to validate the model performance, and the hit rate of each travel mode was more than 80%, indicating the precision of the proposed model. Experimental results also present the higher classification accuracy of the proposed model. Therefore, it may be concluded that the resident travel mode choice may be accurately predicted according to the Bayesian network model proposed in our study. Additionally, this model may be employed to analyze and discuss changes in the resident public bicycle choice and to note that they may possibly be influenced by different travelers' characteristics and trip characteristics.

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Vibration Response Characteristics of the Cross Tunnel Structure

Cited by 91 publications

References 28 publications

Field Experiment on Soaking Characteristics of Collapsible Loess

Field Experiment on Soaking Characteristics of Collapsible Loess

Development and Prospect of Root Piles in Tunnel Foundation Reinforcement

A Bayesian Network Model on the Public Bicycle Choice Behavior of Residents: A Case Study of Xi’an

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