bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Comparison and Analysis between Numerical Simulation and Monitor Data of Deep Foundation Pit Excavation Deformation
Authors: Liu Youping , Zhang Gongping 
Published: April 2021

Abstract
Taking a large-scale deep foundation pit project in Guangzhou financial city as the research background, the construction process of the foundation pit is analyzed by the finite element software Midas GTS-NX. The simulated results are compared with the monitoring data, and the surface settlement deformation of the foundation pit and the horizontal displacement of supporting piles are compared and analyzed. Although the comparison results are different, the overall change trend is the same and the data are similar, and within the range of engineering deviation, the results show that the numerical simulation can provide reference for foundation pit deformation monitoring scheme design and construction scheme design.
Research on the Design of Crescent Ribbed Steel Bifurcation Pipe of High Head Hydropower Station- Take Jinzhan River -I Hydropower Station as an Example
Authors: Pan Shaohong , Wu Yunen , Ding Jiajia 
Published: April 2021

Abstract
The design of the steel bifurcation pipe of hydropower station should be based on the actual situation of the project, and the reasonable arrangement, structure form and structure calculation method should be selected to meet the requirements of bearing capacity, stability and stiffness of the steel bifurcation pipe. In this paper, the selection, arrangement and design of the crescent- ribbed steel bifurcation pipe of Jinzhan River -I hydropower station are analyzed and calculated, so that its structure is reasonable, economical and meets the requirements of safe and stable operation. The steel bifurcation pipe has been built and put into operation, which proves that the design is safe, feasible and reasonable.
On the Characteristics of Cold Spray Technology and Its Application in Aerospace Industries
Authors: Tan Kun , Markovych S. , Hu Wenjie , Wang Yun , Shorinov O. , Wang Yurong 
Published: April 2021

Abstract
Cold spraying technology is an advanced spraying technology developed based on the principles of aerodynamics. It is mainly used to deposit and repair the surface of metal alloy parts to ensure that the parts have better mechanical properties and service life. Compared with traditional thermal spraying technology, cold spraying technology has many advantages, such as low spraying temperature, low oxygen content and low porosity, and it is not easy to cause oxidation, burning, phase change and other phenomena during spraying. This article reviews the principles, technical parameters, and characteristics of cold spray technology, focusing on the effects of powder particle size and shape, particle and substrate temperature, critical speed, spray gun, collision angle, and spray distance on coating quality and deposition efficiency. In addition, the current research and application status of cold spray technology in the preparation of anti-corrosion coatings, high temperature resistant coatings, high temperature oxidation and wear resistant coatings are discussed, and the development prospects of cold spray technology are prospected.
Structured Method of Dynamic Fully Coupled Rheological Model for Seepage Field and Stress Field in Concrete Dam
Authors: Niu Jingtai , Jiang Ling , Luo Xiang , Deng Zhiping 
Published: April 2021

Abstract
The study comprehensively applied mathematics, mechanics theory and method and dam construction knowledge. It’s based on the numerical analysis methods such as the finite element and Fourier transform. It centered on the structured method of dynamic fully coupled rheological model for two fields in concrete dam. The dynamic fully coupled rheological model of seepage field and stress field in concrete dam was built. The finite element equations were given under the dynamic fully coupled actions of seepage field and stress field. The numerical analysis form of finite element under dynamic fully coupling of two fields was proposed. The corresponding calculation program of finite element was developed. The analysis of examples showed that, with the variation of boundary conditions such as dam displacement and water pressure, the model of dynamic fully coupled rheological model could reflect the dynamic change rules of the stress, strain and permeability coefficient in time and space. Thus, it could obtain the distribution of displacement, stress and permeability coefficient in different time within loading process.
Mathematical Model and Numerical Simulation of hydrothermal Coupling for Unsaturated Soil Subgrade in the Seasonal Frozen Zone
Authors: Wang Cong , Ma Zipeng 
Published: April 2021

Abstract
The subgrade in the seasonal frozen zone is easy to induce uneven settlement, frost heave and thaw settlement under the action of environmental factors such as precipitation, evaporation, radiation, etc. The subgrade is mostly unsaturated soil. In non-saline soil areas, its diseases are mostly related to moisture migration and phase change in the soil. In order to study the moisture migration and temperature distribution of the unsaturated soil subgrade in the seasonal frozen zone, a hydrothermal coupling mathematical model was established. Based on the mathematical model, the hydrothermal coupling numerical simulation was carried out by using the COMSOL Multiphyscis finite element program, Given the basic parameters and variables, the model was solved by assigning the same initial and boundary conditions as the field test, and the simulation results were compared with the field test results to obtain very satisfactory temperature simulation results and a good fit between the moisture migration results and the field test values, proving the reliability of the mathematical model.
A State Dependent Thermo-Hyperelastic Model for Geomaterials
Authors: Xu Zhenglong , Zhang Zhichao , Wang Jingkai , Li Linhang 
Published: April 2021

Abstract
A hyperelastic model for the state dependent and thermo-mechanical coupled nonlinear elastic behavior of geomaterials is developed in this paper. In the model the stress-density state dependent elastic moduli and the elastic instability are predicted by the high order terms of elastic strain invariants in the elastic potential function. The effects of true cohesion on the elastic potential of bonded geomaterials such as bonded sands, natural structured clays and rocks are also taken into account. As a result, unified relations between the density, the degradable cohesion, the confining stress and the elastic moduli can be derived for different geomaterials. Meanwhile, such an approach theoretically results in a state boundary and thus a strength criterion for geomaterials from the stability of elasticity. Based on such a hyperelastic approach, the nonlinear thermo-elastic coupled behavior is further considered by defining an equivalent elastic volumetric strain and taking into account a volumetric elastic thermal expansion coefficient dependent on both the volume fraction and thermal property of bound water absorbed on mineral surfaces.
Durability Tests of Silt Reinforced by Tr Materials Under Humid Environment
Authors: Yu Yue , Tang Xiaowu , Fei Minliang , Zhou Lipei , Sun Guoping 
Published: April 2021

Abstract
TR material is the abbreviation of glutinous rice and tung oil, which is a traditional organic reinforcement material since ancient China. Taking Qiantang River silt reinforced with TR material as the research object, 9 samples with different mass mix proportions were placed in the standard curing environment (20 °C, humidity 60%) for 7 days, 14 days, 30 days, 90 days and 180 days respectively. Shear test, permeability test and dry-wet cycle test were carried out on the treated samples. The optimum mass ratio of tung oil, glutinous rice juice and soil was determined as 5:10:85. After 180 days, the increased rate of cohesion c and internal friction angle φ is 26.3% and 15.7%, respectively. At the same time, the long-term permeability coefficient of the best mass ratio is the smallest, and the permeability coefficient KT
of 180 days is 1.775 × 10−6 cm / s. In the dry-wet cycle test, the best performance is T10R10S80, the strength reduction rate is the least, and the permeability coefficient increased rate is the least. From the perspective of absolute value, the optimum ratio T5R10S85 is still the best after the dry- wet cycle test.
Study on the Influence of Large-Span Open-Cut Foundation Pits over Existing Intercity Railway
Authors: Xie Junkai , Gao Bo , Chen Cang 
Published: April 2021

Abstract
As an important way to solve the problems of urban public transportation, urban rail transit has been comprehensively developed in urban construction. However, the subsequent construction of municipal engineering will affect the deformation of the underlying subway tunnel due to excavation and unloading. Aiming at the excavation of the foundation pit of the upper-span intercity railway tunnel section, by optimizing the construction technology, it is proposed to excavate in stages, small pits and small silos, and Midas GTS is used to establish a finite element model of foundation pit construction. The deformation and force influence of the existing tunnel structure underneath have been analyzed in detail. The method of excavation by stages, small pits and small silos can be used. And the technical methods adopted can reduce the impact of soil unloading on the underlying tunnel and ensure the safety and quality of foundation pit excavation. The project provides a reference basis.
Research on Vegetable Oil Based Rejuvenating Agent and Properties of Recycled Asphalt
Authors: Zhang Haiyan , Tang Hui , Xu Bin , Feng Yahong , Feng Lixia , Cao Dongwei 
Published: April 2021

Abstract
Based on theory of dissolution and dispersion and special chemical structure of vegetable oil, the article chooses four kinds of vegetable oil (Tung oil, Castor oil, Rapeseed oil and Linseed oil) and blended them with asphalt. And then Rejuvenating Agents of asphalt based on the four kinds of vegetable oil are prepared. The test results show that good exponent relationship is presented between Tung oil content and Brookfield viscosity of Tung-oil-based Rejuvenating Agent. Furthermore, this paper studies the performance of recycled asphalt by conventional indexes, adhesion, SHRP indexes. The data show it by improving the composition of aging asphalt, thereby enabling recycled asphalt indexes recovered to close to or above the level of original asphalt.
Test Study on the Feasibility of Filling Expressway Subgrade with Carbonaceous Mudstone
Authors: Ye Qiongyao , Zhang Wenhui , Chen Tao , Deng Shengqiang , Wang Yakun 
Published: April 2021

Abstract
The feasibility of using carbonaceous mudstone as expressway subgrade filler is studied through laboratory test. Firstly, the influence of overburden soil pressure on the strength change and argillization of carbonaceous mudstone during seasonal wetting and drying cycles is studied. Test results show that Serious argillization occurs when carbonaceous mudstone immersed in water; the overburden soil pressure can partially inhibiting the swelling deformation, strength reduction and argillization of carbonaceous mudstone; California Bearing Ratio (CBR) of the carbonaceous mudstone increases as the overburden soil pressure increase, but gradually decreases as the number of wetting and drying cycles increase and become stable after 6 cycles, and the stable value of CBR doesn’t meet the requirements of the roadbed and upper embankment, but meets the requirement of the lower embankment; the carbonaceous mudstone studied in the test could be directly used as the lower embankment filler, but could not be directly used as the roadbed and upper embankment filler. Secondly, experiment of improving carbonaceous mudstone by cement is conducted, and results show that the CBR of carbonaceous mudstone improved with cement meets the requirements of the roadbed and upper embankment, and cement-improved carbonaceous mudstone is suitable for filling the expressway roadbed and upper embankment.
Ground Response to Pipe-Roof Tunneling of a Large Underpass in Shanghai Soft Soil
Authors: Cheng Chihao , He Junzuo , Liao Shaoming 
Published: April 2021

Abstract
Pipe roof method is an effective way for urban underpassing scheme. Due to the successive jacking of multiple pipes, the characteristics of ground response are distinctly different from single pipe or twin pipes. In this paper, the gradual ground loss by successive pipe-jacking and the causes of settlement are analyzed. The conclusions drawn from this paper show that: (1) The maximum incremental was right above the pipe axis which could be controlled within 1mm. (2) The shield effect of the former pipe on the latter one resulted in a 50% reduction of maximum incremental settlement. (3) The distribution of cumulative settlement curve was reflected by superimposed effect of staged ground settlements. (4) The results of settlement monitoring illustrated that the field measured settlements were basically tally with those of the simulated values, the goodness of fit was more than 85%.
Application and Research of Health Monitoring System of Xiangshan Port Bridge
Authors: Gao Jian , Li Dongming , Feng Yafei , Wan Lijun , Wu Guojun 
Published: April 2021

Abstract
The core of bridge development in China is from construction to maintenance. Therefore, the structural health monitoring system (SHMS) which can monitor and evaluate the bridge structure condition in real time has attracted wide attention. In this paper, according to the management and maintenance requirements of Xiangshan Port Bridge, the health monitoring system is designed, including sensor subsystem, data acquisition and transmission subsystem, integrated monitoring and evaluation subsystem. Afterwards, the SHMS set up, including the installation of sensors, debugging of system, development of Web User Interface and other work. After trial operation, the results show that the SHM of Xiangshan Port Bridge runs smoothly and can monitor changes and trends of state parameters of bridge structure in real time and dynamically, which provides a scientific basis for the evaluation of bridge structure state and facilitates overall lifetime management of the bridge.
Vulnerability Analysis Based on Ground Motion Intensity Parameters
Authors: Wang Dailong , Li Chuankun , Meng Zhaobo , Wang He , Jin Jie 
Published: April 2021

Abstract
Based on the ground motion intensity parameters PGA and Sa, this paper conducts a comparative analysis of the vulnerability of the Guangyue building’s wooden structure. The results show that under the same earthquake intensity, the existence of a high platform will increase the probability of damage to the Guangyue building’s wooden structure; PGA is used as an earthquake When evaluating dynamic strength parameters, the probability of evaluating the structure to reach each limit state is large, that is, the possibility of the structure exceeding various limit states is large, and the result is conservative, which is more conducive to ensuring the safety of the structure.
Experimental Study on Seismic Performance of UHV Transformers
Authors: Xue Yaodong , Cheng Yongfeng , Lu Zhicheng , Zhu Zhubing , Wang Haibo , Zhang Shujun 
Published: April 2021

Abstract
In order to study the seismic response characteristics of UHV transformers under different earthquakes, a shaking table experiment study of UHV transformers was carried out. The results show that with the increase of seismic excitation, the acceleration of the side wall and the top plate of the box basically shows a linear increase; when the seismic wave is input in the Y direction, the acceleration response is larger and the increase amplitude of acceleration is also larger. The acceleration response of high, medium and low voltage bushings shows similar characteristic: the response when inputting the Y direction seismic wave is greater than that when inputting the X direction; the acceleration value is the largest when inputting X+Y direction seismic wave; the response when inputting the Y+Z direction seismic wave is greater than that when inputting the X+Z direction. As the seismic peak acceleration increases, bushing acceleration and strain gradually increase, the acceleration and strain when seismic waves are input in the Y direction are greater than those input in the X direction. When the seismic excitation increases increase from 0.8 g to 1.2 g, the acceleration and strain response increase amplitude less than those the seismic excitation increases from 0.4 g to 0.8 g.
Study on Rapid Assessment of Traffic Capacity of Girder Bridges Post Major Earthquake
Authors: Feng Biao , Lan Riqing 
Published: April 2021

Abstract
To provide a highly applicable tool, which can assess the damage level and traffic capacity of girder bridges accurately and quickly, we proposed a new rapid assessment model for girder bridges, which contains a vulnerability model with parameter modification and a fast evaluation method for traffic capacity. Based on this model, we developed a rapid assessment software for girder bridges, using Visual C++ and ArcGIS Engine, in which the damage level and traffic capacity of girder bridges post-quake can be highlighted with colourful segments in the road network. Furthermore, we illustrated the functions and usages of this software through an application example.
Discussion on Key Influencing Factors of Construction and Demolition Waste Recovery and Recycling Management in China
Authors: Zhai Kai , Lu Shengpeng 
Published: April 2021

Abstract
Through the literature summary, a list of key factors affecting construction and demolition (C&D) waste recycling and resource governance was identified from three levels: government governance and support, social public participation, and related enterprise participation. By building a collaborative driving model of C&D waste recovery and recycling governance, and based on the system dynamics of C&D waste recovery and recycling governance causal loop diagram, it shows the synergy between various influencing factors of the C&D waste recovery and recycling management. Conclusion: suggestions are come up with promote the development of C&D waste recovery and recycling management by increasing policy guarantees and financial support, encouraging public participation, stimulating the participation of relevant enterprises, and improving the effects of C&D waste recovery and recycling.
Study and Analysis on the Thermal Environment Test in Guanzhong Farm Residential in Winter
Authors: Chen Yiting , Zhu Yiyun , Zhang Lei 
Published: April 2021

Abstract
Rural residences in Guanzhong area have suffered from poor indoor thermal environment and backward energy-saving methods for a long time in winter. In order to study the local thermal environment, improve residents’s thermal comfort in winter and reduce building energy consumption. The research team conducted a typical winter solstice day Conduct thermal environment test and field survey on typical residential buildings in Guanzhong area, and quantify the test data to get the results: 1. Local solar energy resources have a certain potential. 2. The indoor thermal environment is severely humid and cold so that thermal comfort is low. 3. The first floor of residential buildings can basically meet thermal comfort requirements. According to the results of energy consumption calculations, Guanzhong’s farm buildings consume too much energy. In response to the national energy conservation and emission reduction policy, some improvement measures are needed to improve the atmospheric environment. Taking into account the local climate adaptability, residents’ living habits and economic conditions, measures are proposed to reduce the area of the north window by a certain percentage, install additional sunshine rooms, and transform the second floor south to a balcony.
Study on Agricultural Carbon Emission Estimation and Grading Evaluation -- Taking Chengdu as an Example
Authors: Li Shixiang , Yang Yu , Wei Yali 
Published: April 2021

Abstract
At present, China is in the stage of agricultural economic transformation and development. It is urgent to regard low-carbon agriculture as the main task of sustainable agricultural development. This paper takes Chengdu as an example to calculate the total carbon emissions and emission intensity of agricultural carbon in the past 2007-2018 years through the carbon emission coefficient method, and to analyze and evaluate the agricultural carbon emission structure and agricultural carbon emission level. Finally, it is concluded that the present situation of agricultural carbon emissions in Chengdu and its dynamic changes in the past ten years will help further clarify the types of agricultural carbon emissions in Chengdu. At the same time, it can also provide theoretical support for the action of energy conservation and emission reduction and the construction of ecological civilization in Chengdu.
Analysis on Effective Coefficient of Porous Continuous Medium in Seepage Field
Authors: Luo Xiangyu , Zhang Guoxin , Qiu Yongrong 
Published: April 2021

Abstract
When a porous continuous medium is in a saturated state, the effect of pore water pressure on its deformation depends on the effective coefficient in the stress equation. Determination of this coefficient is an important subject for analyzing the deformation of porous continuous media in the seepage field. This work considers a porous continuous medium with square pores to determine the effective coefficient by combining theoretical analysis and a numerical test method. The water element analysis method is applied to further verify the value of the effective coefficient and to analyze the influence of pore water pressure on the deformation of a porous continuous medium from a mesoscopic perspective. Then, the correctness of the pore water pressure is verified using the initial strain method. Through the above methods, the action mechanism of pore water pressure on porous continuous media could be further understood. A reasonable and accurate method for calculating the effective coefficient is also provided. The correct method for analyzing the deformation of porous continuous media in the seepage field is also explained.
Surface Deformation Law of Cixian Section of the South-to-North Water Transfer Project
Authors: Wei Liu Shi , Zheng Zhao Shu , Su Hui , Zhu Ze Qi , Lai Qu Chun 
Published: April 2021

Abstract
The disturbance of ground deformation caused by pipe jacking construction has become one of the important factors affecting the safety of the surrounding buildings and environmental changes. The construction of the sewage pipe network, which is in the Cixian section of the South-to-North Water Diversion Middle Route, is taking as an example. Theoretical prediction and field tests are conducted to research the ground settlement deformation caused by the disturbance of pipe jacking construction. Research indicates that the surface settlement near Hexie Avenue in Ci County meets the engineering safety requirements when the volume loss rate of the local layer is controlled within 6.9%. And the maximum surface settlement within the construction range of the Ci County section of the South-to-North Water Diversion Project was within 2.5-4 mm, which did not break the safety threshold. Suggested values for the formation loss rate and settlement trough width coefficient index are proposed for similar working conditions, which are 3.31% and 0.525 respectively. Relevant research results provide a reference for the study of ground deformation prediction under similar working conditions.