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Administrated by The Education Department of Jilin Province
Sponsored by Jilin Jianzhu University
Editor-in-Chief: CHEN Lei
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Postcode: 130118
ISSN 2095-8919
CN 22-1413/TU
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Simulation study on the influence of damping ditch on blasting vibration of highway slope
LIU Jianfeng;QI Yanjun;WANG Qi'ang;WANG Gang;DUAN Shiming;LIU Shiyue;RAN Shengcai;CUI Gaoyu;Xuzhou Highway Development Center;China University of Mining and Technology;The vibration effects induced by controlled blasting construction on adjacent surface structures hold significant importance. To investigate the influence of damping ditches on blast vibration propagation in cutting slopes, this study conducted numerical simulation experiments based on an actual engineering prototype. The analysis focused on the impacts of trench-to-source distance and trench depth on particle vibration velocity and vibration reduction efficiency, with further discussion on vibration attenuation mechanisms in both singlestratum and multi-stratum geological conditions. The research reveals the following findings: seismic waves undergo energy dissipation and redistribution through incident, reflected, and diffracted waves at different interfaces of the damping ditch, with the blasting back face exhibiting distinct zoning characteristics of vibration reduction efficiency. The vibration attenuation mechanism demonstrates differentiation as trench depth increases from shallow to deep levels, primarily due to varying influence weights of body waves and surface waves. A proximity advantage exists in vibration reduction efficiency, where trenches closer to the vibration source outperform those at greater distances. Field tests have validated the reliability of these findings, providing technical guidance and reference for related engineering practices.
Investigation on the volume expansion characteristics and expansion mechanisms of steel slag immersed in water
ZHANG Yu;LI Chao;SUN Ailing;LI Tiancheng;Inner Mongolia Key Laboratory of Green Construction and Intelligent Operation and Maintenance of Civil Engineering;To investigate the water immersion volume expansion characteristics of steel slag, stability tests of steel slag and density tests of compacted asphalt mixtures were performed to determine the water immersion expansion rates of steel slag aggregates from different sources and asphalt mixtures with varying gradation types. Furthermore, the changes in the internal and surface products of steel slag before and after water immersion were analyzed using the ethylene glycol method, X-ray fluorescence(XRF), X-ray diffraction(XRD), and scanning electron microscopy(SEM), to elucidate the volume expansion mechanism of steel slag. The results show that the f-CaO content, expansion rate, and the time required for the expansion rate to stabilize in steel slag aggregates were significantly influenced by the aggregate particle size and the origin of the steel slag. Moreover, the expansion of 0～3 mm steel slag aggregates with higher f-CaO content had a more pronounced impact on the overall expansion rate of the mixture. Comparing the expansion rates of SMAⅠwith optimal asphalt content and air voids of 5.5% and 3%, respectively, and ACⅠwith 4.3% asphalt content and 4.44% air voids, it was found that asphalt content and air voids are among the primary factors influencing the expansion rate of steel slag asphalt mixtures. The 10～15 mm and 5～10 mm steel slag aggregates of TypeⅠcontribute 46.13% to the relative expansion rate of SMAⅠ, while the 0～3 mm steel slag aggregates in Type Ⅱ contribute 46.38% to the relative expansion rate of SMAⅡ. Finer aggregates with higher f-CaO content lead to a more significant increase in the expansion rate of steel slag asphalt mixtures. The solid solution composed of f-CaO, Fe2+, and CaO is the primary cause of the higher expansion rate observed in SMAⅡspecimens. To mitigate the damage to steel slag asphalt mixtures, it is recommended to fully age the 0～3 mm steel slag aggregates or replace them with other aggregates of the same particle size.
Stability analysis of transmission tower-pile-slope system considering rainfall conditions
ZHAO Wei;ZHENG Xiaohu;QIN Xingyuan;LI Kang;LI Yanyan;DONG Bo;CHEN Cong;The stability of transmission tower is significantly influenced by slope landslide issues, particularly under complex terrain and variable climatic conditions where slope movement critically compromises foundation integrity, thereby posing substantial threats to power supply reliability. The stability of a tower-pile-slope systems under different rainfall conditions is investigated through numerical simulation methods. By incorporating typical wind load condition, the research explores the mechanical response patterns of the system under varying rainfall intensities, revealing the coupling mechanism between rainfall-induced slope instability and foundation failure.The calculation results demonstrate that rainfall substantially reduces slope stability while inducing internal force redistribution within tower structures. Both displacement and deformation characteristics of the tower-foundation-slope system exhibit significant variations corresponding to rainfall intensity variations. These findings provide critical insights for developing rainfall-warning-based stability assessment methodologies.
Study on the influence of wollastonite microfiber composite system on concrete properties
JIN Yujie;YU Longfei;QI Jiale;Using orthogoal experimental design, the contents of wollastonite microfibers(WF), silica fume(SF), VAE powder(VAE), and water-reducing admixture(WRAC) were varied to study the compressive strength, chloride ion permeability, water absorption, and sulfate resistance of concrete. The microstructure and composition of the concrete were characterized using SEM and XRD. The results indicate that the WF/SF/VAE composite system can optimize the internal structure of concrete through synergistic effects. When the WF content is 5%, SF content is 5%, VAE content is 0%, and WRAC content is 0.5%, the compressive strength of the concrete increases by 14.6% compared to the reference group, chloride ion permeability improves by 51.6%, water absorption decreases by 35%. Microscopic analysis reveals that the composite system promotes the formation and uniform distribution of hydration products, such as C—S—H gel, resulting in a denser and more stable microstructure of the concrete.
Study on the properties of carbon black reinforced polypropylene composites
LI Yi;SHENG Linjie;SUN Zengkai;QIN Chao;Polypropylene(PP)/propylene-ethylene random copolymer(PEC)/carbon black(CB) composites were prepared using PEC elastomer as toughener and CB as filler. The effects of CB contents on the crystallization, rheological, mechanical, and thermal conductivity properties of the composites were investigated. Results indicated that CB selectively disperses within the PP phase. The addition of CB enhanced the crystallization ability and crystallinity of the composites. The melt strength and viscosity of the composites increased with increasing CB content. The incorporation of PEC transformed PP from brittle fracture to ductile fracture. After CB addition, the modulus, yield strength, and tensile strength of the composite improved compared to the blend. The composite with 2.5 wt% CB exhibited the most outstanding tensile properties and impact strength. The thermal conductivity of the composites increased with increasing CB content.
Research on Cloud Computing Based on Virtualization Technology
LI Gang-jian(School of Computer science and Engineering Jilin Institute of Architectural and Civil Engineering,Jilin,Changchun,China 130118)In the paper,the author did research on the current trend of cloud computing technology and the cloud computing model.According to its own characteristics,a way is presented based on Hyper-v.The platform has some advantages,so that the characteristics of virtualization will come into perform well.
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The Development Status and Prospects of Diatomite
XIAO Li-guang,ZHAO Zhuang,YU Wan-zeng(School of Material Science and Engineering,Jilin Institute of Architecture and Civil Engineering,Changchun,China 130021)Diatomaceous earth as a very abundant mineral resources,as its porosity,adsorption is strong,light,high melting point,thermal insulation,sound absorption,low refractive index,chemical stability and so on,it has a widely used in many fields.This paper describes the latest research and application of diatomite in fillers,filter aid,agriculture,construction materials and other areas.
Iron Tailings Comprehensive Utilization at Home and Abroad
XIAO Li-guang,YI Jing-hong,CUI Zheng-xu(School of Material Science and Engineering,Jilin Institute of Architecture and Civil Engineering,Changchun,China 130118)The mineral resource is one of the human survival and development important material bases,along with mineral resource's massive developments and the use,the ore is day by day deficient,the tailings recycling has a second world attention.This article describes the tailings and the comprehensive use of the status quo,the application of the building materials,and the proposal in the future development of tailings.
Development of the Sludge Treatment Techniques
Wang Shiyuan (The Countryside Hygiene and Reform Water Office of Jilin Province)Cui Yubo, Wang Cuilan, Jian Zhiyuan (Department of Urban Construction)This paper simply introduced the sludge treatment techniques and its development, and presented the regulation of choosing and developing sludge treatment techniques.
Summary of Data Mining Methods
GUO Xiu-juan (Department of Computer Engineering,Jilin Architectural and Civil Engineering Institute,Changchun130021)The good methods and technologies of data mining may get excellent knowledge.This paper presents an overview on data mining methods.First,the concept of data mining is discussed.Then,this paper describes the theories and technologies on data mining,such as relational rules,decision tree,neural network,rough sets,clustering analysis,genetic algorithms,and statistics analysis.Finally,how to study data mining is forecasted.
Research Progress in Synthesis and Application of Quantum Dots
LI Hua-nan;FENG Wei;WANG Ting;Polyimide had many advantages,such as heat resistance,low temperature resistance,resistance to radiation,flame retardant,non-toxic characteristics,excellent mechanical properties,dimension stability,chemical stability and biocompatibility etc,had been widely used in aviation,aerospace,electrical,electronics,communications,buildings,cars,and other areas of the tip. In this paper,a review was given about the basic classification and main characteristics of polyimide as the core. It was summarized the polyimide synthesis method and modification of significance. Moreover,suggestions were expounded about the application progress of polyimide in many fields,and prospect the development trend of the future.
The Comparison of the French Versailles Palace and China Beijing Imperial Palace
YU Qi,MO Wei (School of Architecture and Planning,Jilin Institute of Architecture and Civil Engineering,Changchun,China 130118)By comparing space layout,building systems,construction materials and structural,architectural decoration and color of different points for the French Versailles palace and the Beijing national palace museum in China,from macroscopical to microcosmic comparison of the two countries palace architecture,cultural of the similarities and differences between China and France is analyzed.Trying to find out the difference between eastern and western culture as the history of eastern and western architectural palaces outstanding representative of China's Beijing palace museum and the French Versailles palace,has long been regarded as the world two great cultural windows.Different cultures on the "beauty" of the pursuit are not the same.Therefore,we compared from an aesthetic point of view these two in the history of human civilization occupy a considerable proportion of the palace construction.To arouse people on architectural aesthetics thinking and a new understanding are done.
Black Humor in George Orwell’s Animal Farm
ZHAO Yu-hong(School of Foreign Language,Jilin Institute of Architecture and Civil Engineering,Changchun,China 130021)Black humor skill is applied by George Orwell in his masterpiece Animal Farm to represent an inhumane society.The skill of irony,the implication of the characters,and fallacy will be analyzed in this article.
The Development Status and Prospects of Diatomite
XIAO Li-guang,ZHAO Zhuang,YU Wan-zeng(School of Material Science and Engineering,Jilin Institute of Architecture and Civil Engineering,Changchun,China 130021)Diatomaceous earth as a very abundant mineral resources,as its porosity,adsorption is strong,light,high melting point,thermal insulation,sound absorption,low refractive index,chemical stability and so on,it has a widely used in many fields.This paper describes the latest research and application of diatomite in fillers,filter aid,agriculture,construction materials and other areas.
The Cause of Global Warming
WANG Hong-jie,SONG Xiao-dong,WANG En-shi(Jilin Institute of Architecture and Civil Engineering ,Changchun ,China 130021;In the early 1930s ,the distinguished Yugoslavian climatologist Milankovich had already developed the theory that a tiny ? uctuation in the eccentricity ratio of Earth's orbit ,or the obliquity of Earth's spin axis ,even in the position of the first point of Aries may render a direct in? uence on the solar radiation's range and degree;therefore ,causes the climate change on Earth .Based on a comprehensive calculation ,the authors came to the conclusion that besides the robust increase of greenhouse gases(CO2 ,CH4 ,etc .) , there are also other factors that cause global warming , but this paper focuses on the angular change between Earth's axis and its ecliptic plane .According to the paper ,both the internal variables(earthquake ,wind ,tide ,rocket's launching ,etc .) and the external variables(the sun's motion , other planets' motion ,meteoric stone ,etc .) impacted greatly on this angle .What's more ,no matter to what degree this angular change arrives at ,it inevitably causes the climate change on Earth throughout the time .
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