bluuebunny/crossref_metadata_2025_split huggingface dataset:
Static and dynamic analysis the influence of underlying tunnel construction on surrounding rock of existing tunnel-type anchorages
Authors: Lianbin Wang , Dayong Shu 
Published: November 2019

Abstract
Due to the constraints of construction period and site conditions, it is necessary to study the influence of construction of underlying tunnel on the surrounding rock of the existing tunnel-type anchorages. Through static excavation and dynamic blasting, this paper systematically analyzes the influence of underpass tunnel construction on the surrounding rock of the tunnel-type anchorages from the aspects of stress, deformation, plastic zone, velocity and loose circle of the surrounding rock. The results show that the effect of excavation of underlying tunnel on the maximum principal stress around the tunnel-type anchorages is small. The maximum relative displacement of the tunnel-type anchorages is smaller than the allowable relative displacement of the code. The distribution of plastic zone around the tunnel-type anchorages is not affected by the excavation of underlying tunnel. When underlying tunnel blasting, the peak velocity of monitoring points of the top arch in each section of the right underlying tunnel is largest. From the area closer to the explosion source to the far area, the reduction of peak velocity in all directions is large. Based on the elasto-plastic theory, Hoek-Brown strength criterion is used to calculate the thickness of the loose circle.
Beam-Truss Model of Steel-Concrete Composite Box-Girder Bridges I: theory and calculation
Authors: Liu Ang , Zhang Zhen-Dong , Li Xuan , Ma Guan-Ling 
Published: November 2019

Abstract
In this paper, modeling strategy for member and section level is firstly established based on shear-flexible grillage theory cellular decks. In addition, modal analysis and static analysis under the dead and live load are conducted for composite simply supported and continuous box girder bridges, the alignment of which includes straight and curve. High accuracy and good applicability of beam-truss model of composite box-girder bridge can be verified due to good correlation of numerical results between elaborate and beam FE model. The research in this paper has laid the foundation for the further application of beam-truss models in the design analysis of actual composite box-girder bridge.
Mechanics of Inhomogeneous Deformation of Concrete Pavement under Temperature Effect
Authors: Nan Chen 
Published: November 2019

Abstract
For the concrete pavement, it has a significant characteristics of Principle of Expand on Heating and Contract on Cooling, which probably causes a bending stress for the slabs. The temperature of upper slab waves a lot rather than the lower part for the effect of fluctuation of environmental temperature. And inhomogeneous deformation of the slab will be caused by the temperature difference, which relates to several typical defects of the concrete pavement. A theoretical analysis as well as a numerical analysis have been made in this paper. According to result of the numerical simulation, the maximum voiding length cmax is 2.176mm. And the result of theoretical analysis is 2.343mm. The error of both results is 7.12%, which proved the reliability of both methods.
Study on Sunshine Temperature Field of Concrete Box Girder Based on Meteorological Parameters
Authors: Lv Shuangshuang , Zhu Liming , Xing Shiling , Wang Chenglong 
Published: November 2019

Abstract
In order to analyze the variation law of sunshine temperature field of low height concrete box girder, Tangshan second ring road cable-stayed bridge was used as the engineering background, the finite element method combined with the field temperature measurement is used to analyze the sunshine temperature field of the concrete box girder by using the weather observation data at the bridge site. The results show that: the temperature field of sunshine in the box girder can be directly analyzed using the meteorological observation data at the bridge site, and the calculation precision can meet the engineering requirements.
Study on Surface Vibration Characteristics of Composite Shallow-buried Tunnel Blasting Construction
Authors: Wu Bo , Lan Yangbin , Peng Yiyong , Meng Guowang , Wei Han 
Published: November 2019

Abstract
Based on the background of the construction of the mining section at the southern end of Yangli Station of Fuzhou Metro Line 2 project, in order to study the ground surface vibration law during the blasting construction of tunnels in the upper soft and lower hard composite strata, the vibration velocity data were obtained through field tests, and the traditional and modified Sadowski formulas were used to fit and analyze the vibration velocity respectively, which were verified by numerical simulation. The results show that under the condition of composite stratum, the peak value of radial vibration velocity of blasting construction on the surface of cave-forming area is the largest, and the peak value of vertical vibration velocity on the surface of non-cave-forming area is the largest; the ground vibration of shallow-buried tunnel excavation area in composite stratum has void effect, and the larger the distance between the blasting centers, the more obvious the void effect; the fitting degree of traditional Sadowski formula is lower than that of modified Sadowski formula V=KQaRb
; because of the existence of soft-hard interface, the attenuation rate of vertical vibration velocity is the sharpest relative to the radial and tangential vibration velocities on the surface of composite shallow-buried tunnels. At the same time, the feasibility of numerical software to simulate such engineering blasting construction is verified.
Nonlinear Finite Element Analysis of CSGR Dyke Engineering on Soft Foundation
Authors: Wang Sha , Jia Jinsheng , Yang Huichen , Zheng Cuiying 
Published: November 2019

Abstract
In order to obtain the optimal section of the cemented sand, gravel and rock (CSGR) dyke on the soft foundation of sand and gravel, this paper designs three different plans to analyze the vertical normal stress of the foundation, comprehensive stability, settlement, maximum and minimum principal stresses, and the foundation stress by adopting the finite element method and the finite element equivalent stress method. Based on the finite element calculation results of the optimal plan, this paper analyzes the safety situation of various parts of the dyke and proposes engineering measures accordingly. Sensitivity analysis of the soft foundation parameters shows that the foundation parameters have a great influence on the stress and deformation of the fending groyne and the seepage proof wall. The analysis in this paper can provide some reference for the design of similar projects.
Research on simulation of anchor concrete frame beam reinforcement in slope
Authors: Tian Xiao , Meng Jiangpeng , Wang Zhaokun 
Published: November 2019

Abstract
The anchor concrete frame beam is a kind of slope protection structure. Based on the project of a road cutting slope from Havelian to Thakot highway in China-Pakistan Economic Corridor, the reinforced effect of anchor concrete frame beam is studied by using the strength reduction finite element method. The safety coefficents are obtained from the stability analysis of slopes with different coefficents in similar geo-environmental settings. The results show that the anchor concrete frame beam can decrease the horizontal displacement significantlly and increase the slope stability. The slope stability reduces as the slope coefficent increases in the same engineering settings. The results can provide reference for the design and construction in the project of high road cutting slope.
Research on sustainable development of construction industry
Authors: Zhao Weiwei , Ye Ruyi 
Published: November 2019

Abstract
In recent years, with the emergence of ecological environment crisis, the topic of sustainable development has attracted people’s attention, and it is also the common goal. With the rapid development of the construction industry, there are many problems to be solved because of the lack of social responsibility. For example, frequent engineering quality and safety accidents, huge resource consumption, inadequate utilization of construction waste, and so on. These actions of construction enterprises not only harm the interests of stakeholder, but also seriously disrupt the order of the construction market. With the improvement of social transparency and the enhancement of citizens’ awareness of safeguarding their rights, the voice of society requiring construction enterprises to fulfill their social responsibilities is rising day by day. From the view of social responsibility, this paper puts forward some suggestions on promoting the sustainable development of construction industry in the aspects of organizational governance, the environment protection, labor practice and so on.
Review of Studies on Risk Early Warning of Public-Private Partnership Projects in Characteristic Town
Authors: Lai Yihong , Wu Shulian 
Published: November 2019

Abstract
Under the new normal background of China’s economy, the construction of characteristic towns is of great significance for promoting the supply-side reform and also the sustainable development of regional economy. In recent years, the construction of characteristic towns is in full swing, and the PPP financing–model has been introduced to various places due to the difficulty of financing. However, the projects combining a characteristic town with a PPP model are more likely to create risks. Based on literature analysis, this paper summarized the current status of risk identification, risk assessment and risk early warning research of PPP infrastructure projects, in order to draw on the existing research results, construct a theoretical framework for risk analysis and early warning of PPP projects in characteristic towns, which might benefit the future research.
Research on Restoring Force Model of Prefabricated Concrete Beam-column Joint
Authors: Shufeng Li , Qingning Li , Di Zhao , Jiaolei Zhang , Dawei Yuan , Huajing Zhao 
Published: November 2019

Abstract
Starting from the research of fabricated concrete frame structure system, the bolt-end plate connection applied in the steel structure and the combined structure is extended into the reinforced concrete structure to form a frame structure with a high-strength bolt-end plate connection. The quasi-static test was carried out. The test results show that the nodes exhibit good ductility and energy dissipation. In order to further explore the seismic performance of this type of structure, according to the experimental fitting method and the “fixed point pointing” law, on the basis of the skeleton curve’ s dimensionless treatment, the resilience model of this kind of nodes is established, and compared with the experimental results, the two agree well, which can be provides a certain reference for elasto-plastic seismic response analysis of this type of structure.
Study on Recycled Concrete Powders as Mineral Admixture in Recycled Concrete
Authors: Chen Xi , Li Ying , Kang Xiaoming , Fan Yaohu 
Published: November 2019

Abstract
The process of recycling waste concrete generated fine powders with a particle size of less than 0.16mm; it contains a large amount of hardened cement and unhydrated cement and has high activity. In order to meet the requirement of sustainable development in concrete industry, this study aims to improve the recycle use level of these fine powders in concrete. First, the properties of the recycled concrete powder were analyzed, and compared with one normal mineral admixture such as fly ash. Then the workability and compressive strength test of the concrete which mixed by different replacement ratio of the recycled concrete powder and fly ash were performed. The results show that the the content of SiO2 in recycled concrete powder is more than cement and fly ash. The replacement rate of RCP has little influence on the slump of fresh recycled concrete compared to fly ash. When the replacement rate of the recycled concrete powder is 20 %, the compressive strength of corresponding concrete at each age is close to that of control concrete, especially at 56d, the compressive strength of concrete reach to 90% of that of control concrete. So the application of the recycled concrete powder can save cement and has certain environmental and economic benefits.
Study on Limit Scouring of Maliuzhou Waterway: A Case Study of the Cross Gate Tunnel Project
Authors: Huang Pengfei , Wang Hua , Wu Tiansheng , Wang Hua 
Published: November 2019

Abstract
Based on the analysis of the water and sediment characteristics of the Maliuzhou Waterway, this paper establishes a local physical model near the project and a mathematical model of two-dimensional tidal sediment with reasonable hydro-logical and sediment parameters of river scouring so as to simulate the river scouring under the extreme conditions of the Maliuzhou Waterway. Based on the calculation results, this paper divides the fracture surface and longitudinal section of the river near the project and analyzes its fracture surface, section and channel layout so as to explore the characteristics of the river scouring under the extreme conditions of the Maliuzhou Waterway. This study shows that under extreme conditions, the deepest scouring of the Maliuzhou Waterway is in the main channel, and the hydrodynamic axis and the talweg of the river channel show little change.
The application of three new technologies in water remediation: taking Pearl River Delta as an analysis sample
Authors: Lu Wenyun 
Published: November 2019

Abstract
The problem of water pollution has always been a concern for people from all over the world. In recent years, due to the enhancement of people’s awareness of environmental protection and the rapid development of science and technology, the solution to water pollution has been put on the agenda. More and more water remediation technologies are constantly being discovered and applied in solving pollution. In this article, the author will give an introduction to three popular water remediation technologies which are Nanofibrous membrane, Biofiltration, and Electrodialysis remediation, discuss the advantages and disadvantages of them, as well as give suggestions to the real application of the three technologies taking Pearl River Delta as a sample.
Hydrological Simulation of Taizi River Basin with HSPF Model
Authors: Zhang Peiqi , Zhang Jing , Song Yongyu 
Published: November 2019

Abstract
With the development of economy and the increase of population, water resources are becoming more and more scarce. The total amount of water resources in the Taizi River Basin of Liaoning Province, China is 5.120 billion m3, and the per capita water resources amount is 845 m3. According to the United Nations standards, it is classified as a water shortage area.In order to better manage and protect water resources, this paper uses Hydrological Simulation Program-Fortran (HSPF) model to simulate runoff in the Taizi River Basin. The Parameter Estimation (PEST) procedure was used to calibrate the hydrological parameters. The results showed that the Nash-Sutcliffe efficiency (NSE) of the calibration period (2009-2011) was 0.78, the correlation coefficient (R2) was 0.89; the Nash-Sutcliffe efficiency of the validation period (2012-2013) was 0.68, and the correlation coefficient was 0.85. It indicates that the HSPF hydrological model has good applicability in the Taizi River basin which will provide useful reference for future modeling research.
Study on failure mechanism of red clay slope under dry and wet cycles
Authors: Wang Lei , Chen Kaisheng 
Published: November 2019

Abstract
In order to study the failure characteristics and mechanism of red clay slope under dry-wet cycling conditions, a model slope similar to engineering slope was established. The test slope was monitored by testing elements, and the variation laws of moisture content, temperature, pore water pressure, soil pressure and displacement were analyzed respectively under the alternating conditions of dry-wet cycling. The failure characteristics and mechanism of slope are obtained. With the increase of dry-wet cycles, the overall water content of slope increases, pore water pressure decreases, lateral displacement increases, and vertical displacement remains unchanged to a certain extent. After five dry-wet cycles, the water content of the top and top of the slope is the largest, the water content of the bottom and foot of the slope is the smallest, the horizontal displacement of the slope is the largest, and the horizontal displacement of the top of the slope is the smallest. The range of temperature change increases with the number of dry-wet cycles, and tends to be stable after the third dry-wet cycle. The earth pressure is the largest at the top of the slope, followed by the foot of the slope and the smallest at the slope surface, and the first two dry-wet cycles have the greatest impact on the earth pressure. In the process of dry-wet cycling, the surface cracks of slope undergo the cyclic process of cracking, healing and re-cracking. The width and depth of cracks increase gradually. The surface failure characteristics represented by gully weathering and spalling gradually change into shallow failure characteristics represented by collapse and slump.
Integrated Water Quality Model and Its Application in Baihe River Basin
Authors: Ma Sijie , Zhang Jing , Song Yongyu 
Published: November 2019

Abstract
The integrated watershed water quality model is an important tool for studying the water environment of the basin. This study explores several comprehensive watershed water quality models, analyzes the development history, structural principle, characteristics and application of the model. This paper preliminary applied SWAT model in the Baihe River Basin, Beijing, China to analyze the water quality changes. Finally, this study briefly analyzes the development trend of the basin comprehensive water quality model.
Control of methane gas concentration in sewage tank reactor
Authors: Wu Xiaowu , Zhao Dongfang , You Xueyi 
Published: November 2019

Abstract
In order to solve the safety hazard of methane gas explosion in dry toilets, the control of methane gas concentration in sewage tank reactor was carried out. The numerical simulation method was applied to study the concentration field of methane gas in the dry septic tank reactor. The main influence parameters considered here are the ventilation pipe diameter and the fan pressure drop. The optimum ventilation condition found by Fluent software is that the diameter of ventilation pipe is 300 mm and the pressure drop of draining fan is 20 Pa.
Analysis of River System Structure and Runoff Evolution of Typical Section in Ziya River Plain
Authors: Si-yan Hou , He Xu , Li-feng Guo 
Published: November 2019

Abstract
In this study, by interpretation method, the density, quantity, length and variation of rivers in Ziya River Plainincreased in the 1960s and 1980s, mainly related to the excavation of small tributaries and canals. By comparing the series of years before and after 1980, the amount of surface water resources in the study area has decreased in the past 30 years. By using cumulative anomaly method and Kendall trend test method, it is found that the annual average runoff of typical cross-section decreases obviously, and the time series sudden change occurs in the late 1970s. The situation of the trunk runoff cut-off and drying-up caused by the river system structure and runoff evolution is evaluated, and the interannual evolution of the eco-hydrological system in Ziya River Plain is obtained.These can provide scientific support for water environment research and water ecological restoration in plain areas.
Fundamental Study on the Rapid Detection Method of Indoor Airborne Microbes and its Applicability to Food Plants for Quality and Safety Improvement
Authors: Liu Ze , Tanaka Takehiro 
Published: November 2019

Abstract
Airborne microbes are examined generally by sampling them on culture media and counting the number of their colonies formed. However, because it takes at least two days for bacteria to be cultivated and five days for fungi, reliable results may not be obtained for a time of need. Therefore, the development of a simple and quick detection method is required. A rapid detection method of indoor airborne microbes is examined and a fundamental study on its applicability to food plants for the purpose of improving quality and safety is introduced in this study.
The variation and influencing factors of the runoff and sediment entering sea in the Yellow River
Authors: Yan Cai 
Published: November 2019

Abstract
This paper analyzes the trend of runoff and sediment entering the Bohai Sea using the streamflow and sediment data of the Yellow River estuary hydrological station. The results shows that runoff and sediment into sea in the Yellow River both reduce in the recent 60 years, there is significant positive correlation between the two. And the influencing factors of runoff and sediment are also researched, it is found that there is no significant correlation between runoff and precipitation, or between sediment and precipitation. The increase of the water intake quantity from the river is the main reason of runoff reduction entering the sea. And soil and water conservation measures and water storage projects result in the decrease of sediment in the river estuary.
Research on monitoring and prevention technology of rock burst in junde coal mine
Authors: Jing Suolin , Jiang Pengfei , Huang Gang , He Xue , Zhang Jingkai 
Published: November 2019

Abstract
Rock burst, a dynamic phenomenon in coal mine, is a special manifestation form of the rock pressure. In brief, rock burst is a kind phenomenon of catastrophic failures of the coal and rock mass. Without any obvious macroscopic premonitory symptoms, a large amount of energy is released when the rock burst occurs, thus causing enormous casualties and equipment damages. Since 2004, rock burst accidents have occurred many times in Junde Coal Mine, resulting in damages of mining roadways, suspension of mining activities, or worse still, abandonment of mining roadways and casualties. Over these years, Junde Coal Mine has formed a set of systematic methods and measures which have achieved good result in filed practice.
Mining pressure analysis and accident prevention on deep working face
Authors: Jing Suolin , Jiang Pengfei , Huang Gang , He Xue , Zhang Jingkai 
Published: November 2019

Abstract
In recent years, with the increasing depth of coal mines, mining pressure accidents impose a serious threat to mining safety. Through the observation and analysis of the mining pressure of the 11301 fully-mechanized caving working face in Zhaolou Coal Mine. In the paper, the main factors affecting the mining pressure of deep working faces were identified, and combined the existing methods for selection of fully-mechanized supports and roof management technology, aiming to prevent mining pressure accidents in deep working face.