bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the structure type of emergency rescue station in super-long railway tunnel
Authors: Li Qi , Xiong Xiaoling , Wang Mingnian , Cao Xiongzhi , Luo Xinyu , Yang Chang 
Published: July 2020

Abstract
In order to ensure the safety of rescue and evacuation of super-long railway tunnel (longer than 20km), an emergency rescue station is generally set up. Through the research on the structure types of the railway tunnel and the railway tunnel group emergency rescue stations at home and abroad, the paper finds out the types of the emergency rescue stations and the advantages and disadvantages of different structural types. Conclusion are as follows,| Super-long railway tunnels in European countries, Japan and China generally adopt the form of double holes. Super-long railway tunnels generally use a single hole in China.| There are six types of structure of railway tunnel emergency rescue station: general encryption transverse channel type, horizontal guide type on both sides, single side flat guide type, refuge space type, encrypted horizontal channel type at the entrance and auxiliary tunnel type at the entrance.
Research on mechanical performance of crushed stones by large-scale triaxial shear tests
Authors: Li Jingshuang 
Published: July 2020

Abstract
Crushed stones were used as furrowed subgrade in recent project. Triaxial shear tests were carried out on selected crushed stone with the gradation of 20 mm to 40 mm. The dry densities of specimens were controlled to be 1.450 g/cm3, 1.600 g/cm3 and 1.721 g/cm3, respectively. Test results show that the constitutive relationship conforms to hyperbola, which can be simulated by Duncan-Chang model. At lower stress level, the crushed stones show slight dilatancy, while at the higher stress level, the crushed stones show shear shrinkage. The shear strength is nonlinear with an interlocking force between aggregates. A linear relation is proposed to describe the variation of angel of internal friction.
Application of BIM + big data in the whole life cycle of engineering project
Authors: Wu Lihua 
Published: July 2020

Abstract
Green, healthy and sustainable development has always been the goal of engineering construction enterprises, which is consistent with the national green environmental protection policy. The application of BIM + big data in engineering construction can effectively help solve problems such as pipeline collision in engineering design, schedule cost control in construction, poor communication and coordination. Its application improves the construction quality and management level, and supports the sustainable development of construction enterprises. This paper first expounds BIM + big data technology, then analyses the application and effect of BIM + big data in each stage of engineering construction, and puts forward some suggestions for the current development status, which has certain practical reference value.
Experimental study on generation discharge mismatch between the Three Gorges and Gezhouba
Authors: Li Zhijing , Zhou Caijin , Li Dazhi , Sun Guizhou 
Published: July 2020

Abstract
Due to the design reasons, the maximum generation flow of the Three Gorges hydropower station does not match the over flow of Gezhouba hydropower station, especially the discharge at peak load in flood season will greatly exceed the full output flow of Gezhouba hydropower station. The excess flow of Gezhouba needs to be discharged from the flood discharge dam section. The potential energy is not converted into electric energy, but directly converted into kinetic energy. The discharge flow velocity is large, which may affect the scour of the downstream reach of the dam. In order to reveal the influence of Gezhouba power plant waste water on the scour of the lower reaches of Gezhouba, this paper carried out a model test study of Gezhouba waste water under the condition that the power generation flow of the Three Gorges and Gezhouba does not match, and analyzed the law of the change of the downstream flow pattern under different waste water conditions of Gezhouba. The results show that the decrease of the abandoned water flow of Gezhouba can help to reduce the flow velocity near the dam downstream, while the influence of the change of the abandoned water flow on the scour downstream is limited.
Application Study of Univariate Linear Regression Model in Seepage Pressure Analysis of Earth Dam Taking Dongzhen Reservoir in Fujian Province as an Example
Authors: Tian Hui , Qin Genquan , Liao Chengwei , Lin Ping 
Published: July 2020

Abstract
Based on the typical non-deterministic relationship between the seepage pressure of the earth dam and the upstream water level, this paper proposes a method for establishing a linear regression model for seepage pressure analysis of the earth dam; Taking the Dongzhen Reservoir Dam as an example, two historical data representing osmometers BS3 and BS4 were selected for simulation application, and the reliability test of the regression model was carried out using the correlation coefficient test method. The results showed that the correlation coefficients of the reservoir water level and the seepage pressure monitoring values were 0.911 and 0.850, respectively, and the correlations were good and in accordance with the normal law; By applying the prediction and control functions of the built model, the prediction interval of the monitoring results of the osmometer at different reservoir water levels and the safe variation range of the reservoir water level at different seepage pressure values are obtained. Subsequently, the model was used to analyze and verify the data of all 29 piezometers in Dongzhen Reservoir, and the attribution analysis of the relevant differences.
Research on Construction and Restoration Technology of Modern Historical Buildings
Authors: Lei Luo , Yong fa Wu 
Published: July 2020

Abstract
As an ancient civilization, China still has a lot of historical remains, but many historical buildings have been damaged to a certain extent during long-term use, and the safety of the buildings is difficult to guarantee. In response to this problem, it is necessary for relevant cultural departments to do a good job in the construction and restoration of historical buildings, and to highlight the cultural connotation of these buildings.
Study on Multi-level Microstructure of Plant Fiber
Authors: Zhang WX , Yang LM 
Published: July 2020

Abstract
Compared with common artificial fibers, plant fibers have advantages of lower density, high strength, low cost, and they can be more easily extracted from plants. Thus, they are ideal reinforced materials to the development of high performance composite materials. Based on the existing research results of the applicant, we develop a kind of Hamiltonian system based boundary integral numerical model to analyse the micro mechanical properties of multi-level structure of plant fibers and its reinforced polymer composites. Using the microscopic observation and micro tensile test to determine the longitudinal mechanical parameters of plant fiber composite material and the lateral scale of the component materials, so that a multi-level micro mechanical model can be established.
Study on Vibration of Flexible Beams with Interior Fluid
Authors: Zhang WX , Yang LM 
Published: July 2020

Abstract
In this paper, the basic governing equations of nonlinear dynamics of solid-liquid coupling system are established. Without considering the free vibration, according to the characteristic polynomial of the Jacobi matrix of the disturbance equation required by the Hopf bifurcation, the algebraic equations that the critical velocity must meet are derived. The numerical results show that when the velocity exceeds the critical value, the vibration amplitude of the beam jumps obviously.
Study on reflection of one dimensional stress wave
Authors: Zhang WX , Chen YG 
Published: July 2020

Abstract
Impact load is a common form of dynamic load. Because of the time effect and the inertia and deformability of the structure, the impact load will propagate and reflect in the form of stress wave in the structure. In this paper, the form of stress wave transferred from the impact end to the structure is analyzed, and the wave equation of axial compression stress wave is derived.
Research on the Development of Green Building Industry in China
Authors: Dong Lirui 
Published: July 2020

Abstract
Architecture is important to people’s lives and production. However, while various buildings play an active role, the problems of environmental pollution and excessive energy consumption caused by construction are gradually emerging. If the problems are not resolved, they will have an adverse impact on people’s sustainable development. Under such circumstances, green building industry can be produced and developed. The problems of construction pollution and excessive energy consumption in China are also very serious. Under the above background, this paper has carried out research on the development of green building industry in China. In terms of specific content, this article analyzes the reasons for the development of green building industry in China, explores the development status and problems of green building industry in China, and finally puts forward some suggestions for promoting the better development of green building industry in China.
Application Analysis of Foundation Pit Monitoring Technology in Geotechnical Engineering
Authors: Li Yinghao , Yue Chuanyun , Zhao Yang 
Published: July 2020

Abstract
In the process of foundation pit excavation, due to the comprehensive influence of many complex factors and the fact that the theoretical predicted value cannot accurately, comprehensively and fully reflect the various changes of the project, it is particularly important to monitor the foundation pit in real time. During the construction of pile foundation and soil reinforcement, due to the damage of soil stress balance, it will have a certain adverse impact on the surrounding buildings (structures), roads and pipelines. In order to ensure the normal construction and use of the project, the surrounding buildings (structures), roads and underground pipelines should be monitored periodically, and the construction scheme should be timely adjusted according to the monitoring results.
Safety information perception, forewarning & forecast of Chinese small reservoir based on risk classification
Authors: Lu Qiling , Fang Weihua , He Qi , Wang Xue , Na Wei 
Published: July 2020

Abstract
In order to effectively manage more than 90000 small reservoirs in China, aiming at their characteristics, based on engineering classification, this article established a system of safety information perception, early warning and prediction based on safety risk classification in terms of the safety risk factors such as occurrence environment, structural materials, supervision and management, and accident loss. It solved the standardization and pertinence problems of small reservoir risk management in China.
Research on the Investigation Characteristics of the Re-Building Wharf Project at the Original Site
Authors: Tian-yun Liu 
Published: July 2020

Abstract
Taking the re-building fishing wharf project of Beira in Mozambique as an example, the investigation characteristics of the re-building wharf project at the original site are described, including the collection of the original wharf design data, the exploration of obstacles in the investigation area and the zoning statistics of the investigation results according to different regions. On the basis of the differences in different regions, the indexes such as soil indicator, vane shear strength and over-consolidation ratio should be provided by zone, so as to provide more practical parameters for the design.
Main points of emergency water source project planning in Xiantao City
Authors: Lin Xin , Du Zhehua 
Published: July 2020

Abstract
Emergency water source plays a vital role of reducing risks of water supply in cities. The Chinese government has paid great attention on reserve and emergency water source. They have made clear the construction time requirements. For cities with single water source, the construction of emergency water source or standby water source should be basically completed by the end of 2020. This paper summarizes the planning content of the emergency water source project in the city, and focuses on the key points of Xiantao emergency water source function positioning. The key points includes water source function identification, economic scale calculation and determine risk duration. In the original plan, the risk duration is fifteen days, the effective storage capacity of the reservoir is proposed to be 3.5 million m3. Through systematic analysis and calculation, the risk duration is ten days, the effective storage capacity of the reservoir is 2.3 million m3. The project plan is optimized and the investment is saved. It is expected to provide a guidance for planning of standby and emergency water supply system in cities.
Planning and design of Rural Complex under the background of Rural Revitalization——Taking the eastern mountainous area of Jilin province as an example
Authors: Baochang Liu 
Published: July 2020

Abstract
The ecological environment and natural resources in the eastern mountainous areas of Jilin Province have special and obvious advantages. From the “Rural Revitalization” strategy proposed by the 19th National Congress of the Communist Party of China to the “rural complex” proposed in the No.1 document, this paper analyses the development model and policy in domestic and international area, combined with the regional characteristics of the eastern mountainous areas in Jilin Province and the advantages of rural complex development. In order to provide reference for similar projects, the planning principles and main contents of rural complex construction in this area are discussed.
Impact of sea level rise on estuarine salt water intrusion–A numerical model study for Changjiang Estuarine
Authors: Song Zekun , Shi Weiyong , Zhang Junbiao , Yuan Di , Wu Qingsong , Wang Rusheng 
Published: July 2020

Abstract
A 3D and high-resolution salinity transport numerical model of Changjiang Estuary with unstructured mesh was established using the MIKE3. The salinity transport model results were tested and verified by the observed data in Changjiang Estuary, the statistics of correlation coefficient are in good values. And then, the verified salinity transport model was used to study the impact of sea level rise on saltwater intrusion in the Changjiang Estuary. The results show that the entire North Branch was flooded with high saline water and a large amount of salt water spill over from the North Branch into the South Branch, which caused the South Branch with a high-low-high saddle-shaped distribution. With the rise of sea level, salt rocks such as the North Branch, the South Branch, and the North Channel moved upstream to varying degrees, strengthening the saltwater intrusion in the eastern Changjiang River. The high saline waters from North Branch spill over into South Branch also increased. The isohaline of North Branch South Branch and North Channel move to upstream, and move downstream in South Channel, North Passage and South Passage. The high salt water from the North Branch into the South Branch increased the salinity of the upper section of the South Branch.
Characteristics of seawater intrusion in the coastal area of Weihai
Authors: Qin Peng , Li Shanhai , Liu Hongliang 
Published: July 2020

Abstract
Based on the comprehensive investigation, sampling and analysis of hydrogeology and environmental geology, this paper analyzes the characteristics of seawater intrusion in the coastal area of Weihai and points out the influence of human engineering activities on seawater intrusion in the area.
Study on Harmonious Identification Method and Application of Human-Water Relationship
Authors: Ke Zhou 
Published: July 2020

Abstract
Based on the deep mechanical analysis of human-water relationship, this paper put forward the concept of harmonious identification and carry out quantitative analysis of the harmonious relationship between two or more related parties. The contribution of different related persons to the harmonious relationship, the primary and secondary relationship, the influence of different influencing factors on the harmonious relationship and the process of the primary and secondary relationship are explored. The harmony identification methods are studied both tor modeling and non-modeling methods. It is sure that the present findings should lay a foundation for the harmonious regulation of human-water relationship.
Three-dimensional numerical simulation of water flow characteristics in wide and narrow rivers
Authors: Xueting Wang , Lijian Qi , Yun Zeng 
Published: July 2020

Abstract
In the mountainous area, due to the influence of the topography and the incoming water, it is easy to form a wide and narrow river channel. The water flow structure is different from the single river channel, and the change trend is related to the river channel section shape and flow. The three-dimensional numerical model is established by simulating the wide and narrow rivers in the mountainous area of Sichuan. The results show that the average cross-sectional velocity of the narrow section is positively correlated with the flow rate, but the variation is not obvious in the wide section; the shear stress of the bed surface is basically symmetrically distributed along the cross-sectional direction; the shear stress of the side wall of the narrow section is negatively correlated with the height of the side wall, and the maximum value appears on the water surface, due to the influence of the recirculation zone, the shear stress of the side wall increases firstly and then decreases with the shear height of the side wall; the shear stress of the side wall has a scouring effect on the river bank, which makes the narrow section of the river bed having a tendency to continuously cut down, and the wide section of the river bed is continuously widened.
Research on Existing Problems and Improvement Measures of Fabricated Shear Wall
Authors: Xiao Tongliang , Li Hubing , Yu Ziyang , Li Yan 
Published: July 2020

Abstract
When assembling the shear wall during hoisting and positioning, due to the many and dense reinforcements around the shear wall members, there are also many connection joints with other members, which makes the construction more difficult during assembly; it needs to be connected with the floor slab, too many connection joints are easy to bend the steel bar. This study proposes a shear wall positioning installation method. According to the parameters of the shear wall components, installing matching positioning braces before the components are hoisted can reduce unnecessary joint damage during the installation process and improve the efficiency of construction.
A brief review on the fabrication and mechanical behavior of functionally graded concrete materials
Authors: Liu Qiang , Zhang Huihua , Hong Ping , Han Shangyu 
Published: July 2020

Abstract
Functionally graded concrete materials (FGCs) are new concrete composites whose functions and properties change with the spatial position. In this paper, the research status on the fabrication and mechanical behavior of FGCs was briefly reviewed, and the next work is also summarized.
Research on the construction of stable sandcastle structure
Authors: Ma Tingyu , Wang Tao , Hu Jianshuo , Zhang Guiyong , Zhuang Yuhan , Li Jiating , Chen Jionghui 
Published: July 2020

Abstract
We model and analyze the optimal 3d geometry of sandcastle, discuss the optimal sand-water ratio of sandcastle, and analyze whether it is still the optimal 3d geometry in the case of rainfall. First of all, we assume that the sandcastle is a solid, the waves are fluid, through the establishment of fluid-solid interaction model, using the deformation variable of the sandcastle as indicators of sandcastle collapse or instability, and then we apply the ALE method, namely Eulerian method and LaGrange method, list the relevant differential equations by calculating the transport volume between grids, the simulation results show that the shape of semi ellipsoid is the best. At the same time, we analyze the phenomenon such as the stress on the arc slope, the movement of sand grains along the arc and the percolation during rainfall using simplified Bishop method and obtain the expression of the safety factor of the landslide in the rainfall. Through iteration, the results show that the semi ellipsoidal shape is still the best. Finally, we establish the relationship between the shear strength and water content of the foundation in the unsaturated state, and the optimal water content is calculated between the interval [1.8%, 2.1%].
Research on Anti-Crack Design of Super-Long Concrete Structure
Authors: Jiang Huihui 
Published: July 2020

Abstract
There are many reasons for cracks at super-long concrete, which may be due to factors such as tensile stress and temperature shrinkage. Combined with the existing research and in-depth analysis from multiple angles, the causes of mass concrete cracks and the design method of temperature post-casting zone are described. Finally, related technical suggestions and supplementary measures were also put forward. At present, the anti-crack design of super-long concrete structures is mainly based on experience. Structural measures are used. The comprehensive effect lacks check and review. Even if the maximum crack width is checked, the load effect of concrete forming and cool shrinkage is basically not combined. For different requirements, an appropriate crack controlled standard is selected, and the maximum crack width limit of concrete specifications is generally used as the upper limit.
Nano Fumed Silica Particles on Cement Properties
Authors: Li Zhi , Wang Yanmin , Wu Yanling 
Published: July 2020

Abstract
The hydration of cement paste is generally responsible for the development of essentially every engineering property of cement paste. The compressive strength and early hydration performance of cement mortar can be improved by adding nano silica into ordinary strength mortar, which is related to the pozzolanic properties of nano silica. Hence, this paper investigated the effects of different amounts (2%, 4% and 6%) of fumed silica on hydration and hardening of cement. The result indicates that water consumption of standard consistency of cement increases with the addition of nano fumed silica particles. In addition, with the dosage increase of fumed silica, the setting time gradually becomes shorter. It is worth noting that the setting time of slurry becomes shorter obviously when the addition amount of nano fumed silica is 2%. The result of cement sand test indicates that the addition of fumed silica reduces the strength of cement, which is related to the hydration reaction. It is suggested that nano fumed silica should be used in combination with high efficient plasticizer, which decreases the agglomeration and directly impacts kinetics of hydration and leads to improvement in workability as well as concrete strength through the increase in the formation of silicate calcium hydrate.
Study on Hydration Behavior of Cement Mortar with Nano-Metakaoline by Electrochemical Impedance Spectroscopy
Authors: Li Chuang , Fan Yingfang , Yu Jian 
Published: July 2020

Abstract
The hydration process of cement mortar with nano-metakaolin (NMK) for three contents (3%,5%,7%) in early hydration stage and stable hydration stage were investigated by electrochemical impedance spectroscopy (EIS). The results show that the addition of NMK can accelerate the hydration process of cement mortar with NMK in hydration early stage (1-12h) and stable hydration stage (1-28d). NMK can increase the resistance of continounous conductive path RCCP. At 28d, the RCCP of specimen with NMK contents of 3%, 5%, 7% were increased by28.7%, 43.4% and 71.1%.