Study on the Force Characteristics of Aviation Fuel Pipeline under Soil Occupancy LoadFang, Mengru; Zhang, Hao; Sun, Weihua; Han, Haoyu; Li, Yingying; Liu, Caocao; Wang, Yujie; Chen, Jinzhu; Xu, Taolong
doi: 10.1088/1742-6596/2445/1/012008pmid: N/A
Aviation fuel pipeline is one of the important lifelines of aviation coal supply at airports. When crossing a densely populated area, the aviation oil pipeline will inevitably be disturbed by natural and human factors, such as unreasonable soil accumulation near the pipeline, when the soil load is too large, the weak foundation soil will produce different degrees of deformation, the pipeline is subjected to various complex force forms under the action of soil displacement, resulting in a series of damage to the pipeline, and eventually cause pipeline safety accidents, resulting in the loss of people’s lives and property and environmental damage. Therefore, studying the force characteristics and safety prevention and control countermeasures of buried aviation oil pipelines under the surrounding soil pile occupation pressure has a very important guiding role and practical value for ensuring the operation safety of the airport lifeline. In this paper, the stress and deformation of buried oil and gas pipelines under the action of surrounding soil piles are analyzed, the influencing factors of buried oil and gas pipeline stress under the action of soil accumulation are analyzed by finite element software ABAQUS, the detailed stress analysis of the pipeline is carried out,and the finite element simulation method is verified by on-site large-scale stacking tests.
Activation and Application of Wet Shotcrete Concrete with Coal Gasification Slag AggregateKangkang, Wang; Songhui, Liu; Meng, Xing; Bing, Pan; Haibo, Zhang
doi: 10.1088/1742-6596/2445/1/012006pmid: N/A
By analyzing the shortcomings of the existing dry shotcrete process in the coal mines and the shortage of natural sand and gravel resources, it is proposed to use coal gasification slag to replace all natural sand and gravel in the preparation of wet shotcrete. Coal gasification slag has alkali-activated cementitious activity, and its strength as an aggregate in cement mortars still shows significant growth after 28d of age. First of all, the gasified slag aggregate cement mortar was mixed with calcium carbide residue to further stimulate its activity, and the effect law of different amounts of calciumcarbide residue on mortar strength was studied. The results showed that the mortar strength increased continuously with the increase of calcium carbide residue admixture, and the mortar strength increased slowly after the admixture reached 8%. With 8% admixture, the flexural strength at 90d age increased by 58.9%, and compressive strength increased by 13.6% compared with 28d age. MIP, XRD and SEM microscopic analyses showed that the incorporation of CCR promoted the alkali-activated cementation reaction of the gasified slag aggregate, eliminated the oriented aggregation of calcium hydroxide at the cement-aggregate interface, improved the interfacial bonding, and significantly reduced the percentage of harmful pores (50-200 nm) and more harmful pores (>200 nm) in the mortar, which explained the microscopic mechanism of the significant increase in mortar strength. Then the mining wet shotcrete was prepared with coal gasification slag as aggregate and calcium carbide residue as cementing material, and the 28d compressive strength reached 34.8MPa, which significantly improved the concrete strength and ensured the stability of the coal mine roadway support.
Peer Review Statementdoi: 10.1088/1742-6596/2445/1/011002pmid: N/A
All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing Publishing.• Type of peer review: Single Anonymous• Conference submission management system: Morressier• Number of submissions received: 15• Number of submissions sent for review: 14• Number of submissions accepted: 9• Acceptance Rate (Submissions Accepted / Submissions Received × 100): 60• Average number of reviews per paper: 2• Total number of reviewers involved: 10• Contact person for queries:Name: Yingfa LuEmail: [email protected]: Hubei University of Technology - Hubei University of Technology
Analysis on Mechanical Characteristics of Substation Wall under FloodYao, Han; Wang, Qing; Han, Huina; Liu, Kaiyue; Han, Fengkai; Tian, Li
doi: 10.1088/1742-6596/2445/1/012005pmid: N/A
The safety and stable operation of substation facilities during a flood depends on the dependability of substation flood walls. The finite-element (FE) model of the prefabricated flood wall is established based on the actual project, and the mechanical characteristics of the wall are analyzed, along with the load transmission mechanism of the wall, in order to study the bearing capacity of the prefabricated flood wall under the flood. The critical parameter study is completed, and its impact on the wall’s force characteristics is made clear. The findings demonstrate that the load transfer mechanism of the prefabricated flood wall is clear, and that crucial joints, such as those connecting the wall panel to the column and the column to the base, are under increased stress. The performance of the wall is significantly influenced by both flood depth and flood velocity. The safety of the prefabricated flood wall is obviously decreased when the flood velocity is greater than 2 m/s or the flood depth is greater than 1.0 m.
Prefacedoi: 10.1088/1742-6596/2445/1/011001pmid: N/A
2022 International Conference on Applied Physics and Energy Development (APED 2022), scheduled to be held in Beijing, China, was held virtually online during December 24-25th, 2022, taking the attendees’ well being as first priority.APED 2022 is organized by Hubei Zhongke Institute of Geology and Environment Technology. APED 2022 is aiming to bring together innovative academics and industrial experts in the field of applied physics and energy development to exchange ideas, to present sophisticated research works and to discuss hot topics. During the conference, the conference consist of three sessions, including 1 5 oral presentations, 3 keynote speeches, and 6 poster presentations. In the first part, some scholars, whose submissions were selected as the excellent papers, were given about 10 minutes to perform their oral presentations one by one. Then in the second part, keynote speakers were each allocated 30-45 minutes to hold their speeches.The proceedings of APED 2022 span over 2 topical tracks, that include: Energy Saving and Environmental Protection, Energy Development and Technologies. Every accepted paper has undergone peer review process arranged by the Editorial Committee. We believe that the Proceedings will serve as an important research source to provide recent development and information related to applied physics and energy development.On behalf of the Organizing Committee, we would like to take this opportunity to express our sincere gratitude to all authors and presenters. We are also grateful to the Technical Program Committee members and reviewers as well as all the colleagues from IOP publisher. It is the joint efforts of everyone that makes the conference a great success.List of Committee Members are available in this Pdf.
Numerical Study on Smoke Diffusion and Smoke Control in Urban Underground Curved TunnelQi, Zhao; Li, Junmei; Xie, Fei; Liu, Wenbo
doi: 10.1088/1742-6596/2445/1/012003pmid: N/A
Effects of the radius and fire heat release rate on the smoke propagation and smoke control in curved tunnel are studied by the numerical methods. Six radiuses as 70 m, 150 m, 200 m, 250 m, 300 m and 400 m and two different fire sizes as 5 MW and 30 MW are involved. Numerical results show that comparing with the smoke flow in the straight tunnel, smoke temperature distributions across the cross-section is not symmetry with the centerline in the curved tunnel, and the smoke diffusion close to the outside boundary appears to be fast. At the higher level of the curved tunnel, such as 3 m above the tunnel floor, the smoke temperature would decrease with the distance from the fire increasing. However, at the lower level of the tunnel, the temperature would increase firstly and then decrease, maximum temperature would occur in the bend region of the curved tunnel. When the fire heat release rate is big, this temperature might be high enough to injure the people. Smoke ventilation system would run in time under this condition. Critical velocity in curved tunnel is larger than that in the straight tunnel.
Study on the Effect of Pressurized Air Supply Outlet Setting on the Effect of Anteroom Smoke ControlLiu, Donghua; Zhuang, Yuehan; Dou, Pengliang; Liu, Qianyi; Zhou, Chuanhui
doi: 10.1088/1742-6596/2445/1/012002pmid: N/A
In the selection of smoke control system, the Technical standard for smoke management systems in buildings (GB51251-2017), Article 3.1.1, paragraph 2, makes strict requirements for the setting of mechanical pressurized air supply outlets in anterooms, in order to study the influence of different setting methods of supply outlets on the smoke control effect of anterooms, the wind speed of the anteroom doorway section and the smoke flow in the anteroom are researched for different settings of the location of outlet and air supply angle with the help of Pyrosim. The results show that the effect of anteroom smoke control is not only related to the wind speed of the doorway section, but also related to the air velocity distribution at each point of the doorway section; at the same time, the air supply angle also has some influence on it.
Capacity Assessment of a Transmission Tower Considering the Wind-Ice Probability DistributionsLiang, Zhang; Yake, Tang; Chen, Chen; Kai, Niu; Haowei, Pei
doi: 10.1088/1742-6596/2445/1/012004pmid: N/A
Extreme weather, such as wind and ice, threatens the safety and stability of transmission networks. In this paper, the joint probability distribution model of wind speed and ice thickness are established, based on which the bearing capacity of a transmission tower under combined wind and ice loads are evaluated. The results show that the developed probability distribution models can well characterize the dependence structure of wind speed and ice thickness, and the safety of the transmission tower under combined wind-ice loads can be guaranteed within its design life.
Numerical Analysis and Experiments on Heavy Oil Heating of ShipwrecksDu, Guangming; Zhang, Wei; Zhang, Puyang; Liu, Jingjing
doi: 10.1088/1742-6596/2445/1/012007pmid: N/A
Analyze the change of oil temperature flow times during the heating process of wreck heavy oil and the temperature gradient change in the radiation area of the heating source. Using the result guide the heating process of low-temperature underwater oil recovery operations on the wreck. fluid software was used for the analysis process of the numerical simulation, and the physical model test is a simulation test of low temperature underwater electromagnetic heating of heavy oil. In this way, data related to the heating process of heavy oil can be obtained. from the numerical analysis results and the physical model test results, it can be concluded that the numerical simulation results are similar to the experimental verification results. The result can be used for engineering guidance. Due to the physical properties of heavy oil, the oil temperature decays faster during the heating process and the radiation effect of heat source is small, using the electromagnetic heater heats the heavy oil in the oil tank, and the heavy oil can be heated to meet the requirements of the pumping operation in a short time. The calculation model parameters are derived from actual operations. Numerical calculations and physical test results are of great significance to engineering guidance and can guide the underwater cryogenic oil pumping operation of shipwrecks.