bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of impact of offshore platform pile under the waves and ice load Introduction
Authors: Wang Jun , Wang Liting , Wu Chongfu , Lang Junbiao , Zhang Junning 
Published: July 2019

Abstract
This article uses finite element software to simulate the internal force and deformation of pile-soil under the wave and ice load. The group pile foundation model is simplified in the plane as a single pile affected by other piles.Calculating wave force based on Morison Equation,The effect of wave force and ice load calculated with the measured wave force and ice load on the pile is compared. According to the time history curve, when the absolute value of acceleration is maximum, the curves of the bending moment, axial force, shear and displacement of the pile with the depth of the pile under the action of wave force, ice load and joint force are analyzed, the time history curves of pile top displacement under the combined action of wave force and ice load are analyzed,the displacement time history curves of different positions of piles are compared.Finally, the effect of buried depth, pile diameter and free length on the pile body interaction under the wave force and ice load is analyzed.
On Bearing Capacity of Power Tunnel Angle Steel Brackets
Authors: Jia Liu , Xiaotian Fang , Yi Wang 
Published: July 2019

AbstractBased on the typical power tunnel project in Guangzhou, a finite element analysis model is established based on full-scale test. The stress, strain and displacement of the support under end load are studied. The results show that the length of the bracket and the thickness of the angle steel have great influence on the bearing capacity of the support, and the relationship between the length and the bearing capacity is basically linear. The model is used to analyze the parameters of the bracket, and the optimal structure form is obtained to achieve the goal of economic and efficient.
Research on Risk Management of Ginza Project
Authors: Zhang Mengfei , Wang Tiedan , Peng Dinghong , Guo Bingxue 
Published: July 2019

Abstract
This paper reviews the basic situation of risk management at home and abroad, starting from the view of project investors, and carries out risk management analysis for specific construction projects in Ginza. Firstly, the concept and classification of project risk management are put forward. Then, the risk management of a city’s Ginza is thoroughly analyzed from four risk management processes: risk identification, risk assessment, risk decision-making and risk monitoring. The whole process of risk management is completed by four procedures, so as to reduce risk losses.
Interaction Analysis of Multiple Cracks Based on the Maximum Shear Stress Criterion
Authors: Jianfeng Xue , Yuelin Sun , Zhenzhong Shen 
Published: July 2019

Abstract
In order to analyse the interaction of multiple cracks in the process of the cracks propagation and penetration, the overlap triple-cracks penetration test was simulated according to the maximum shear stress criterion. The stress intensity factors of the crack tips were calculated by means of element-free method (EFM). The results show that the maximum shear stress criterion can simulate the crack propagation process well. With comparison with the single crack model, the formation mechanism of the wing cracks and the shear cracks, and the interaction between the cracks and its influence on the multi-cracks propagation path were also explained.
On-site Monitoring and Comparative Analysis about Surrounding Rock Pressure Variation with Time in Unsymmetrial Loading Tunnel
Authors: Hu Jiang-chun , Sun Fa-yong , Li Yuan , Cui Li , Ji Meng-jie 
Published: July 2019

Abstract
Bias Tunnes are common seen and it has complicated variation on their surrounding rock pressure. It is crucial for the security and stability of a tunnel to determine the variation law of surrounding rock pressure and on-site monitoring technology. This essay compares the experimental data to the theoretically calculated data of a certain tunnel according to the data from on-site monitoring and theoretical analysis. The result indicates that the real data of surrounding rock pressure of three chosen cross sections is close to the calculated data from grade V surrounding rock. To be specific, the vault and the arch waist are in good agreement. The pressure on the tunnel is obviously unsymmetrial. The data of surrounding rock pressure of arch waist and flank wall on the left side is larger than that on the right side.Also, there is a significant difference between the measured data and calculated data of pressure of horizontal adjoining rock. The horizontal stress of surrounding rock on the bias tunnel is over-released. The measured pressure data on flank wall is much larger than its calculated data.In conclusion, The timbering system should be reinforced in the early stage of construction and the rigidity of timbering system should be chosen carefully. The result of this research can contribute to the tunnel construction design and construction safety in the future.
Analyzing chaotic effect of reinforced concrete pile driving in cohesive soil
Authors: Du Ting , Yan Tiecheng , Liu Liping 
Published: July 2019

Abstract
This paper presents the chaos phenomenon in pile driving. Firstly, the pile wave equation that Smith put forward is used for painting Poincare section, and then the basic features of chaos are obtained. By analyzing the Poincare section, a point with which the ratio of penetration to velocity is the largest is discovered, and that is to say energy consumption is the lowest at this point. Moreover, the relationship between hammer weight and dropping height is proved to satisfy the construction experience of light blow with heavy hammer through curve fitting. So according to the theory, the value of impact force and initial value can change to get the hammer weight and dropping height for different square and circular piles under the lowest energy consumption. The results show it is better to use square piles during driving, and the relationships between square and circular piles with different cross-sections and its impact force on pile top, hammer weight and dropping height satisfy a certain function equation, respectively. Hence, the corresponding hammer weight and dropping height can be selected to save energy consumption and reduce the cost during construction according to their functional relation.
Research on Tunnel Risk Control and Evaluation Index Based on Fuzzy Theory
Authors: Wen Fei , Yin Zihan , Zhou Ying 
Published: July 2019

Abstract
In recent years, many large scaled tunnels, like the Kouksa Tunnel, with complicated construction have emerged in China. The multiple factors, including intricate topography and weather conditions, all make the potential risks highly uncontrollable during tunnel excavation. The researching group made comprehensive assessments to geological risks of the Kouksa Tunnel through the fuzzy theory, and drew the conclusion that its risk belonged to level three, as a medium one. By assessing geological risks, it will be helpful for the construction unit to take measures to prevent high-risk geological disasters and ensure the safety of tunnels.
Preparation and Properties of Carbon Nanotube-Ag/AgCl Electrode for Marine Electric Field Test
Authors: Chen Wenbo , Song Yusu , Li Hongxia 
Published: July 2019

Abstract
The carbon dioxide was used as the material to modify the Ag/AgCl marine electric field electrode, and a new type of marine electric field detecting electrode was designed and manufactured. The surface morphology observation, electrochemical performance, electrode self-noise and range stability time were tested. The result shows that the specific surface area of the Ag/AgCl electrode increases greatly after the addition of carbon nanotubes and the range stability time is shortened. The range is small and the exchange current density become larger. It shows good electrochemical performance. Howeve, its electrode self-noise is too large, which is not suitable as a marine electric field detecting electrode.
Soil Parameters’ Influence on the Mechanical Behaviour considering Boundary Condition
Authors: Xu Binbin , Zhang Naishou 
Published: July 2019

Abstract
In this paper, how to determine the soil parameters and initial values employed in the numerical calculation using experimental results is talked over in detail. The results of the triaxial compression tests and one-dimensional tests for undisturbed and disturbed samples are utilized step by step to modify the numerical results. It is found that there are several steps to model the whole procedure of sampling from the ground to the experiment equipment. Therefore, the step of taking the soil samples out from underground, which is assumed to be under the undrained condition accompanying with unloading process until the deviator stress becomes zero, is always ignored in the research.
Static Load Test Study on Long-span Continuous Rigid Frame Bridge with V-shaped Pier
Authors: Zhang Fei , Wang Yan 
Published: July 2019

Abstract
Taking the main bridge of the shuidong bridge in Youxi country of Fujian province as background, this paper develops the static characteristic analysis and static load test study on long-span prestressed continuous rigid frame bridge with V-shaped pier. By the analysis and comparison between the measured data and FEA results, it evaluates the working condition of the bridge. The results show: Firstly,each evaluation indicator tested meets the requirements of “Test methods for large-span concrete bridges” Secondly, the strain efficacy coefficient of measured points in top plate of each control section is within 0.65∼0.74, and that of the measured points in bottom plate is within 0.64∼0.73, the residual strain of the measured points is less, therefore, the safety stock of the bridge is sufficient, and it is on the flexible working condition basically; Finally, the measured value and the theoretical value of deflection curves along the longitudinal bridge is compatible, the efficacy coefficient of vertical deformation is within 0.55∼0.85, and the severity of the practical structure is more.
Providing strategic method to increase performance in execution and management of high-rise building
Authors: Dezhkam Majid , Xue Suduo , Liu Zhansheng 
Published: July 2019

Abstract
In current situation, high- rise building projects execution seems difficult issue. These problems cause to increase duration, possible delay, and increasing project costs. The main goal of this research is prediction of possible accidents in respect of intellectual, behavioral and structural dimensions which establishes various problems such as time, cost, quality and etc in high-rise building execution. Therefore, it should be provided a model which can make suitable and on time various decisions and strategies in least of possible time and cost in case of satisfying impact episodes during project execution and can control deviations and manage executive plans in regard of suitable reliable performance for projects. This article is applicable method in regard of goal and is descriptive- exploratory method in regard of method and form. First, key activities in project are evaluated. Then, interior and exterior environmental factors, duration and the cost of project execution are considered by their impacts to each other, current obstacles in project execution are identified and studied in frame of professional variables of executor organizations. Finally, the technique of partial minimum squares in combination of meaningful non-parametric tests are approved by using Azar board Company (high rise- building company) engineers as statistical society.
Method for evaluating user-side flexible device access to power grid
Authors: Zhang Ke , Gong Taorong , Shi Kun 
Published: July 2019

Abstract
In this paper, the benefit model of energy saving and emission reduction for electric vehicles and fuel vehicles are established, the situation of energy consumption and carbon emission between the two sides were comprehensively analyzed. Then, the reliability model of distribution network was established. Based on the theory of peak-valley time-of-use electricity price and V2G market regulation agreement, the reliability of connecting electric vehicles to distribution network is evaluated accordingly. The results show that the energy consumption of electric vehicles is much lower than fuel vehicles and the economy is better. For example, according to 2017 data, more than 130,000 electric vehicles in Beijing can save up 70,000 RMB per kilometer during peak hours. Reasonable connection of electric vehicles to power distribution network can effectively reduce carbon emissions and has remarkable environmental protection effect. Compared with disorderly charging of electric vehicles, V2G market with peak-valley time-of-use electricity price can obviously improve the stability of the system.
The Knowledge Map of Marine Energy
Authors: Lyu Shuran , Wang Wanqing , Wang Chunxue , Zhang Jiayi 
Published: July 2019

Abstract
In order to analyze the research hotspots of marine energy, the Citespace III software was used to visually analyze marine energy. The database was collected on the criteria of marine energy as the keyword, and time span extended from 2007 to 2016 on the basis of the “Web of Sciencetm core collection database”. The scientific knowledge maps analysis of marine energy has been conducted based on the Citespace III software, and analyzes the active countries/regions, institutions and research hotspots in related research fields. Active countries/regions, institutions and research hotspots of relevant research areas have been studied, and University of Chinese Academy of Sciences is at the first place of whole research institutions in marine energy field. Keywords co-occurrence analysis results show that coast, corrosion, kinetics, evolution and sediments have the highest centralities which are the focal keywords in marine energy research field. The results of the co-citation analysis show that wave energy, tidal stream energy, tidal stream turbines, and the microalgae biofuels are the hotspots in marine energy research field.
Application Research of GPR in Quality Detection of Urban Underground Jacked Pipes Construction
Authors: Yang Tianchun , Dai Shixin , Deng Hanyang , Xu Degen , Wang Qiren 
Published: July 2019

Abstract
Nowadays, pipe jacking method is usually adopted in the construction of urban underground pipelines. In order to ensure the construction quality of pipe jacking method, geophysical non-destructive prospecting methods are used for detecting the compactness around the jacked pipes. Based on the theory of ground penetrating radar (GPR), the void models of jacked pipes with two different materials (i.e. cement pipe and steel pipe) were established, and the finite element method was used to simulate the 2D forward modeling of GPR. At the same time, combined with the urban underground jacked pipes construction project in Xiangtan city, Hunan province, China, GPR was used to carry out field prospection of the quality of jacked pipes construction. The results of forward simulation and practical applications show that good results can be obtained when GPR is used to detect the construction quality of cement pipes, which is the same as that of using GPR to detect the construction quality of tunnel. But the collected signals are not effective when the steel pipes are detected, which is because the radar signal cannot penetrate the steel pipe, and there are multiple reflections between the radar antenna and the pipe wall. Therefore, new non-destructive prospecting methods are needed for void detection of steel jacked pipes.
Experimental study into turbulent characteristics of airflows under stratum ventilation with pulsating air supply: comparison to steady air supply
Authors: Tian Xue , Li Bozheng , Cheng Yong 
Published: July 2019

Abstract
Stratum ventilation is more energy-efficient than conventional ventilation strategies, whereas its thermal comfort can be further improved. Compared with steady airflows, dynamic airflows are capable of improving thermal comfort. Turbulent characteristics of airflows can affect human thermal comfort. This study aims to investigate the turbulent characteristics of airflows in the occupied zone under stratum ventilation with pulsating air supply, which can produce dynamic airflows. The turbulent characteristics were compared with that under conventional steady air supply. Experiments were conducted in a classroom mock-up using stratum ventilation. Five cases, namely, one with steady air supply and four with pulsating air supply were designed. The turbulent intensity (Tu) and power spectrum of air velocity signals were analysed. The results showed that the Tu of the airflows in the occupied zone under pulsating air supply was greater than that under steady air supply by 10-15%. Power spectrum density exponents (β) of airflows under the two air supplies fluctuated within the same range of 0.5 to 1.2. However, the power spectrum density function showed different distributions on low frequency area. The turbulent characteristics of airflows created by pulsating airflows may provide better thermal comfort.
Characteristic Research on the Generation of Ozone Using Dielectric Barrier Discharge
Authors: Du Zhehua , Lin Xin 
Published: July 2019

Abstract
Ozone has been widely used in many fields due to its strong oxidation ability. Under the conditions of the experiments, the results are as follows: With an increasing applied voltage, both ozone concentration and ozone generation rate increase, while ozone generation efficiency increases at first, reaching peak value, then decreases slowly; With an increasing gas flow rate, ozone concentration decreases, while both ozone generation rate and ozone generation efficiency increase at first, reaching peak value, then decrease; When power supply frequency is changed in the range from 5.0kHz to 9.9kHz, no apparent laws of ozone concentration, generation rate and generation efficiency are found; When gap spacing is changed in the range from 0.3mm to 0.5mm and dielectric thickness is unchanged, shorter gap doesn’t show better effect.
Research on multi-dimensional target time series prediction model for power grid infrastructure projects
Authors: Zhang Jian , Jin Xianing , Song Yi , Yang Weihong , Zhang Mingli , Gao Jing , Yang Bo , Li Zhanjun , Wang Yihe 
Published: July 2019

Abstract
In order to adapt to the changes in the external power industry environment, prevent external audit supervision risks, and deepen the internal lean management level, we take the investment statistics of power grid infrastructure projects as the entry point, scientifically regulates investment statistics, and focuses on solving the distortion of investment statistics and the problem of the department not cooperating. By constructing the multi-dimensional target timing sequence prediction curve of investment statistics, the paper provides reference for the reported value of investment statistics, improves the authenticity and reliability of investment statistics, and at the same time, deepens the investment statistics management, providing solid support for the lean management and control target of power grid companies.
Pit-retaining Structure Construction Technique of H-shaped Steel Anchor Composite Pile- Prefabricated Wallboard Adopting Compaction Grouting Method of a High-rise Building in Guangzhou
Authors: Gao Luheng 
Published: July 2019

Abstract
Taking the deep excavation engineering of a tall building in Guangzhou as an example, this paper introduces the pit-retaining structure construction technique of H-shaped steel anchor composite pile- prefabricated wallboard adopting compaction grouting method. The main construction process of this technique includes: (1) surveying setting-out to fix piles’ locations, (2) hoisting piles into place and adjustment, (3) H-shaped steel piles driving, (4) layered and segmented excavation and pile body treatment, (5) layered and segmented drilling anchor stocks one by one from top to bottom, (6) hoisting prefabricated wallboard in position, (7) inserting reinforcement and binding firmly with protruding bar of precast wallboard, (8) layered and segmented high pressure grouting, (9) pouring expansive concrete at joints,(10) repeated step(4) to step (9), (11) steel bar binding of middle beams, framework supporting and concrete grouting, (12) acceptance check. This method utilizes the integral foundation pit enclosure structure formed by the H-shaped steel pile, anchor rod and precast wallboard and the construction follows the principle of layered and segmented excavation, setting anchors step by step and grouting immediately after hoisting, which realize the assembly construction of the foundation pit enclosure structure and can effectively saving time, retain soil and seal water.
Benefit evaluation of power substitute project for industrial users
Authors: Zhang Xinhe , Luo Guoliang , Zhang Jiaxin , Liu Qiang , Hu Ruoyun 
Published: July 2019

Abstract
Power substitution in industrial field is an important measure for Chinese government to control air pollution, and how to evaluate the benefit of electric energy substitute project effectively is related to the effectiveness of this measure. In this paper, the Comprehensive Benefit evaluation index system of industrial electric energy substitution project is constructed from three dimensions of economy, environment and society, and in order to avoid the deficiency of single comprehensive evaluation method, a combinatorial model based on anp-entropy method and improved TOPSIS method is established. Finally, the rationality of the evaluation method is verified by an example.
Low-cost Drilling Technology for Horizontal Wells with Atmospheric Shale Gas in the Outer Margin of Sichuan Basin
Authors: Zhang Guohui , Chen Rong , Hu Gui , Huang Weihe , zhang Xiwen , liu Hai 
Published: July 2019

Abstract
Shale gas reservoir at the outer edge of Sichuan basin belongs to normal pressure shale gas reservoir. In the analysis of the difference between the current and the pressure shale gas drilling, the technical measures to reduce the cost of drilling, the design of the well, the borehole trajectory, the drilling, the drilling fluid and the cementing process, the design of the three shafts, the design of the structure of the shaft, the design of the two dimensions of the well, the design of the two dimensions, the design of the orbital trajectory of the shafts, using the spin guide technology to control the orbital trajectories of the two shafts, the low-oil, and the optimal production of the concrete and the production of the drilling and the drilling costs, the technology and the measures, to provide the technical support for the economical and efficient development of the natural gas in the Sichuan basin.
Study on Line Sail in the Process of Double-guided Parachute Deployment
Authors: Zhang Mingliang , Gao Puyun 
Published: July 2019

Abstract
Double-guided deceleration parachute is widely used in large-scale space return activities. Compared with single-guided parachute, it has higher security, but its structure is more complex. This paper aims to study on line sail and analyse the effects of different initial dynamic pressure, separation speeds and angles of attack on the phenomenon during double-guided parachute deployment. The results show that for the double-guided parachute, the bigger the dynamic pressure of the return cabin is, the smaller the separation speed is, the bigger the angle of attack is, the more serious the line sail phenomenon will be.