Numerical study on the behavior of utility tunnel subjected to ground surface explosion

Qian, Haimin; Zong, Zhouhong; Wu, Chengqing; Li, Jun; Gan, Lu

doi:10.1016/j.tws.2020.107422

Cited by 47 publications

(29 citation statements)

References 35 publications

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“…(1) e rendezvous rules cannot be easily changed during frequency hopping, where WSNs are usually incorporated into a system together with servers, mobile applications, and databases [24]. (2) According to its different functions, different sensor matching schemes must be designed.…”

Section: Limitations Of Wsn Conditionsmentioning

confidence: 99%

Multiple Prime Expansion Channel Hopping for Blind Rendezvous in a Wireless Sensor Network

Zhixin

Deng

Zhang

et al. 2022

Wireless Communications and Mobile Computing

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A channel rendezvous is a significant aspect of communication. In this context, blind rendezvous is the process of selecting a common available channel and establishing a communication link for wireless devices in a wireless sensor network. The rendezvous of asymmetric and heterogeneous wireless devices is a challenge. Thus, to improve speeds and stability of rendezvous, we analyze time slot overlap and channel determinism in the rendezvous algorithm and propose a rendezvous algorithm named Multiple Prime Expansion (MPE). In a final simulation study, we compare the performance of the MPE with other existing algorithms in an asymmetric and heterogeneous scenario. Results show that MPE has excellent performance for the ATTR and MTTR.

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Section: Limitations Of Wsn Conditionsmentioning

confidence: 99%

Multiple Prime Expansion Channel Hopping for Blind Rendezvous in a Wireless Sensor Network

Zhixin

Deng

Zhang

et al. 2022

Wireless Communications and Mobile Computing

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show abstract

“…With increasing urbanization, China has begun to accelerate the construction of utility tunnels to improve the utilization of urban underground space. 1 The utility tunnel is a central location of pipelines for utilities such as gas and water supplies, cable, communications, and drainage in a city. 2 Compared with the traditional direct-buried laying method for pipelines, utility tunnels can provide enough working space for staff and can also be equipped with sensors and monitoring equipment, which greatly facilitates the maintenance and repair of various internal municipal services.…”

Section: Introductionmentioning

confidence: 99%

“…2 Compared with the traditional direct-buried laying method for pipelines, utility tunnels can provide enough working space for staff and can also be equipped with sensors and monitoring equipment, which greatly facilitates the maintenance and repair of various internal municipal services. 1,3 At present, most utility tunnel projects in China are constructed by the integral cast-in-place method. Although this method is technically mature, the construction quality of the utility tunnel is susceptible to environmental factors, and the construction efficiency and environmental pollution of the integral cast-in-place method are not satisfactory.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on seismic response of split‐type prefabricated utility tunnels through shaking table tests

Luo

Zhou

2022

Earthq Engng Struct Dyn

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Due to the advantages of prefabricated structure, its applications in utility tunnels are increasing. However, more connection joints have raised concerns about the vulnerability of prefabricated utility tunnels in earthquake disasters. The main objectives of this research are to analyze the seismic response, vulnerable parts and failure modes of a prefabricated utility tunnel. A pair of twin models of prefabricated utility tunnels with two‐compartment layouts were designed, and then set up to load ground motions synchronously through a large‐scale shaking table of 6 m × 6 m under two different boundary conditions: one buried inside a soil box and its twin laid outside the soil as a comparison. The results show that: the damage of the split‐type prefabricated utility tunnel is mainly concentrated in the connection joints, and the connection joint at the top corner of the compartment with larger cross section is the vulnerable part that needs special attention; the SSI effect has a great influence on the seismic response of the prefabricated utility tunnel, and the model buried inside the soil box shows stronger seismic response than its twin laid outside the soil. The experimental results and analysis in this paper can provide a helpful reference for risk assessment and prevention, seismic design, and structural optimization of prefabricated utility tunnels.

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“…The determination and optimization of the emergency evacuation path based on the building can effectively reduce the casualties caused by the accident. Given the harm caused by gas pipeline explosion accidents, scholars have conducted extensive research, and the research objects include adjacent parallel pipelines, , tunnels, pipe corridors, and buildings, and so on. However, the influence of buildings on overpressure propagation has not been paid enough attention to in the high-consequence area of gas pipeline, especially in the multi-building area, and more attention is often paid to the influence of gas pipeline explosion on various engineering structures.…”

Section: Introductionmentioning

confidence: 99%

Study on Overpressure Propagation Law of Vapor Cloud Explosion under Different Building Layouts

et al. 2021

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To determine and optimize the emergency evacuation path of personnel in the case of vapor cloud explosion caused by pipeline leakage and improve the safety control measures in the high-consequence areas of gas pipelines, this study was conducted. This work mainly studied two questions: whether various research methods applicable to the solid explosive explosion are also applicable to vapor cloud explosion and the influence of different building layouts on the overpressure propagation law of vapor cloud explosion. First, the applicability of several empirical models and computational fluid dynamics (CFD) methods in vapor cloud explosion overpressure prediction is systematically compared and analyzed. Second, the finite element models based on the fluid–structure interaction are established to study the overpressure propagation law under the influence of different building layouts. Finally, based on the overpressure propagation law, the determination and optimization principle of the emergency evacuation path of personnel when an accident occurs are given. The results show that the CFD method and empirical model based on equivalent assumption between trinitrotoluene and combustible gas are not suitable for the study of gas-phase explosion, while the mixed gas method based on CFD is more suitable for exploring the overpressure problem of vapor cloud explosion. Buildings arranged perpendicular to the direction of blast wave have the most obvious enhancement and weakening effect on overpressure, and the maximum increase rate and decrease rate are about 90%. The maximum increase rate of overpressure between two vertical layout buildings is more than 60% higher than that between two horizontal layout buildings. When determining the emergency evacuation path, the non-explosive side of the building perpendicular to the shock wave layout should be given priority. If it is necessary to pass through the building gap, the gap between the two horizontal layout buildings should be preferred to ensure that the damage of overpressure to personnel is minimized. The research results can provide a theoretical basis for the improvement of personnel safety control measures in high-consequence areas of the gas pipeline.

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Numerical study on the behavior of utility tunnel subjected to ground surface explosion

Cited by 47 publications

References 35 publications

Multiple Prime Expansion Channel Hopping for Blind Rendezvous in a Wireless Sensor Network

Multiple Prime Expansion Channel Hopping for Blind Rendezvous in a Wireless Sensor Network

Experimental research on seismic response of split‐type prefabricated utility tunnels through shaking table tests

Study on Overpressure Propagation Law of Vapor Cloud Explosion under Different Building Layouts

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