bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Research on Tunnel Lining Water Leakage from the Aspect of Operation Influence
Authors: Ding Hao , Jiang Xinghong , Li Ke , Hu Xuebing , Cheng Liang 
Published: September 2019

Abstract
In the early times, restricted by the tunnel construction technology and technical difficulties, tunnel diseases, especially water leakage of lining are widespread in the tunnel engineering of China. Leakage disease would adversely affect the lining structure and operation environment, which may endanger the normal operation of tunnel projects. Existing leakage classification standards for tunnels are mainly based on the apparent view state, and the impacts of the actual operating environment are not fully taken into consideration. Based on the characteristics of leakage influences on tunnels, leakage in tunnels is analysed from the perspective of traffic safety, including the influence on driving safety and the influences of tunnel operation. Through investigation, point out the shortcomings of existing leakage classification methods, such as criteria are not complete, quantitative criteria are insufficient, disease treatment are not considered, and so on. The research results will provide important ideas for future research of tunnel lining leakage.
Spatial-temporal Features of Nitrogen and Phosphorus Losses of Jingui River Watershed in the upstream of Lijiang River
Authors: Pan Linyan , Dai Junfeng , Yu Chenwenjiong , Xie Xiaolin , Wu Zhiqiang 
Published: September 2019

Abstract
To find out the nitrogen and phosphorus concentration and load emission regularity and its effect during the rainy season + irrigation period and dry season + non-irrigation period in the small watershed, five spatial scales (3.35 ∼27.25 km2) nested in the Jingui river watershed are selected and regularly monitored from October 2017 to September 2018. The results showed that the nitrogen and phosphorus concentrations in the rainy season + irrigation period and dry season + non-irrigation period increased with the increase of the scale. The total nitrogen and total phosphorus load per unit area in the rainy season + irrigation period decreased with the increase of the scale; the dry season + non-irrigation period increased slightly. The same nitrogen and phosphorus index concentration was significantly different at different spatial scales. The main reason for the scale effect was the distribution pattern of land-use. Affected by this, scale D, the critical scale of nitrogen and phosphorus load in Jingui river watershed, its average load of total nitrogen, ammonium nitrogen, total phosphorus and total dissolved phosphate reached the highest value of the watershed. The contribution rate of nitrogen and phosphorus load in rainy season + irrigation period and dry season + non-irrigation period of research areas with different area depends on precipitation and the distribution pattern of land-use. Therefore, the nitrogen and phosphorus emission control and pollutant reduction in the rice irrigation districts of Lijiang river basin should consider the spatial-temporal features and effects of nitrogen and phosphorus pollutant transport.
Design and application of sewage treatment process in expressway service area
Authors: Duan Kewu , Ai Chengyuan , Chen Fang 
Published: September 2019

Abstract
In order to improve the efficiency, impact resistance and purification effect of sewage treatment in service areas, the composition and quantity of sewage water quality in expressway service areas were studied. A highway service area in Yunnan Province uses a combined process for sewage treatment, and the scale has been reached 4000m3/d. The specific process is “multi-point water inlet A/O process + denitrification sand filter + phosphorus removal filter + chlorine dioxide disinfection + activated carbon filter”.The actual effluent quality meets the”Discharge standard of pollutants for municipal wastewater treatment plant” (GB18918-2002). And the first-class standard meets the requirements of “The reuse of urban recycling water-Water quality standard for urban miscellaneous water consumption” (GB/T18920-2002). The engineering practice proves that it is completely feasible to use this combined process to treat sewage in the highway service area, which can be used for reference and reference by similar projects.
Calculation models and analysis methods of the parametric vibration of radial gates
Authors: Liu Jiliang , Liu Yunhe , Wang Zhengzhong 
Published: September 2019

Abstract
Parametric vibration is one of the main reasons for the failures of radial gates. This paper presents three calculation models of the parametric vibration of radial gates which reflect the mechanical properties and geometric features of the gates. Two most commonly used analysis methods, i.e., Bolotin’s method and the finite element method, were described to determine the boundaries of regions of the dynamic instability of radial gates. A numerical example concerning finite element method was also demonstrated.
Research on LUCC in Nansi Lake Area Based on GF-1 Image
Authors: Li Qin , Sang Guoqing 
Published: September 2019

Abstract
Based on the high-resolution images of Nansi Lake, the multi-scale segmentation of eCognition and the object-oriented nearest neighbor method are used for classification and visual interpretation and correction.The results show that the classification method is relatively fast, the boundary of the ground class fits natural objects, the classification parameters can be classified based on panchromatic bands, and other spectral bands and indexes can be subdivided.According to the results, the order of land area in the Nansi lake basin is irrigated land > lake region > urban land > aquaculture water surface> paddy field > unused land > navigation channel > forest land > river channel.
Refined characteristics of rainfall in Guangxi area for mountain flood based on hourly precipitation
Authors: Zhou Ning , Zhang Xinxin , Li Hongen , Xu Haifeng , Li Zheng , He Yongjun 
Published: September 2019

Abstract
On the basis of hourly rainfall dataset from 92 meteorological stations for the 10 years (2008-2017), the spatial and temporal distribution of precipitation in Guangxi were analyzed. Results showed that high value precipitation centers were found over different districts during two time frame, 6:00-12:00 and 18:00-24:00. The rainfall over north of Guangxi mainly happened during 18:00-24:00, but over the middle of Guangxi was during 6:00-12:00. The hourly precipitation distributed unevenly on season scale. Seasonal differences in diurnal variation of rainfall were distinguished. Summer rainfall events concentrated at morning, but the events during other three seasons were more likely to happen in the evening. Using empirical orthogonal function (EOF), the first principal component displayed apparent spatial distribution, which would be helpful to classify the security of mountain flood. During the 6:00-12:00, the patterns were more typical to describe the high rainfall centers in summer. As for the other three seasons, the patterns were appropriate during 18:00-24:00.
Research on the methods of BIM reliability prediction with the construction schedule in the application of project of Chushandian reservoir
Authors: Juan Wu , Bingru Zheng , Die Chen 
Published: September 2019

Abstract
With the development of BIM (building information model), based on the existing construction management theory, combined with the idea of intelligent construction, fully integrating BIM and 4D technology, we can realize the optimization of construction schedule and real-time perception and control of the actual progress of construction. In this paper, the design model is built on the basis of 3D digital technology and CATIA software as the carrier. In the Sql Server database management system as the platform, with the use of information management platform data, the 4D BIM model has been formed, and the schedule control system has been applicated in the Chushandian reservoir project, preliminarily implemented schedule monitoring target. Chushandian project application shows that to achieve the progress of data entry, the use of human-computer interaction realized the dynamic simulation of the progress of the interactive query and other data. The comparison of schedule deviation can be achieved by entering the schedule and actual progress into the network database; through the analysis of abnormal records, and the formulation of measures, the realization of schedule can be ensured.
Multi-Objective Optimal Scheduling of Wangwu Reservoir Based on NSGA-II
Authors: Xu Zhen , Li Qingguo , Feng Shiyuan , Li Wanwan 
Published: September 2019

Abstract
Wangwu Reservoir is a multi-purpose reservoir that integrates urban water supply, irrigation, industrial water and landscape ecological water supply, and a multi-objective optimal scheduling model is established to explore the relationship between water supply loss and landscape loss caused by water shortage in Wangwu Reservoir. Based on the GANetXL program, the NSGA-II algorithm is applied to the optimal scheduling model of Wangwu Reservoir, and the Pareto optimal solution sets are obtained in the three different incoming water conditions of high flow year, normal flow year and low flow year. These optimal solution sets provide decision-making basis and specific program references for the optimal scheduling method of Wangwu Reservoir.
Study on Comprehensive Water Price of Multi-water Resources in Ningjin County
Authors: Sun Xiuxiu , Liu Haijiao , Fan Mingyuan , Ni Ludong , Wang Weiping 
Published: September 2019

Abstract
Ningjin County is located in northwest Shandong Province in the North China Plain. The water shortage can be solved if the South-to-North Water Transfer Project is completed, but the project water price is higher than the price of local groundwater and Yellow River water, so it is urgent to make the comprehensive water price of multi-water resources in this area. The water demand of non-agricultural water users in the planning year of 2020 and 2025 is forecasted based on water supply and consumption in current year of 2017, and two water supply schemes are set up respectively, four schemes totally considering the factors whether Yangtze River water will be obtained. The water prices of four schemes are calculated using weighted average model. The results show that when the transferring water replaces partial underground water in 2020, the comprehensive water prices of scheme 1 and scheme 2 are 3.21 yuan/m3 and 2.11 yuan/m3 respectively. When the transferring water replaces all groundwater in 2025, the comprehensive water prices of scheme 3 and scheme 4 are 2.92 yuan/m3 and 1.44 yuan/m3 respectively. The compensation mechanism of water price is discussed finally.
Preliminary Research and Application of MIKE SHE Model in Jialingjiang River Basin
Authors: Zhang Meng , Zhang Jing , Song Yongyu 
Published: September 2019

Abstract
Introduce the model structure, principle and characteristic of MIKE SHE hydrological model. Advances in research and application of MIKE SHE model are summarized in 3 aspects: applicability study of the model, basic process research of the model and further application research of the model. Probes into the modelling and application process of MIKE SHE model in Jialingjiang river basin. The development direction of MIKE SHE model in the future is analysed and forecasted, according to the research progress of MIKE SHE model in China.
Modelling and Design Analysis of Contract Payment Methods in Civil Engineering Projects
Authors: Ding Jiyong , Zhai Wujuan , Wang Zhuofu , Zhang Kun , Cai Juefang 
Published: September 2019

Abstract
Contract payment method in a civil engineering project, to a certain extent, determines the distribution of project risk and benefits. Up till now, several types of contract payment method have been formed. However, with the continuous development and innovation of project delivery system, new contract payment methods are required to match with project delivery methods. By comparing the existing classic payment methods, this paper analyzes the effects of variable contract payment methods on risk allocation. Based on a unified view, existing contract payment methods are expressed by mathematical models and compared with parameters, and then the way of contract payment method design is discussed. Finally, a case study was presented to illustrate the design of contract payment method for a specific project in Chinese context.
Study on the Coupling Vibration and Driving Comfort of the Railway and Highway Bi-purpose Bridge
Authors: Zhang Yuan , Wang Dongqi 
Published: September 2019

Abstract
In this paper, the influence of the track irregularity, speed and vehicle grouping on the dynamic respond and driving comfort of the bridge is studied. The results show that, the interaction between the automobile and the train can be effectively reduced by increasing the damping of the bridge structure; it’s the span and the train formation but not the speed and the track irregularity which effect the dynamic displacement of the bridge; the driving comfort is influenced a lot by the track irregularity. This study is of great significance to the driving comfort.
Model Design and Calculation Analysis of Large Span Space Structure
Authors: Yulin Peng , Jiali Yu , Yang Li 
Published: September 2019

Abstract
In order to work out the problem of insufficient bearing capacity for large span space structure, the structural model optimization design and fabrication process were researched by using Structure Analysis Program 2000(SAP2000) and Finite Element Analysis Software (ANSYS). The model strength, rigidity deformation and stability analysis were calculated respectively according to the software. A series of innovative work during the design and manufacture process of the entire model were carried out, finally by designing and making large-span spatial structure model and loading test, the loading characteristics of large-span spatial structure were gotten, and some design advice were put forward.
Study on Bolt Support Design for Carbonaceous Shale Tunnel of Highway at High Altitude and Cold Region
Authors: Guo Hongyan , Li Ke , Liu Xinrong , Cui Xiangyang , Luo Hao 
Published: September 2019

Abstract
With the large-scale development of road traffic infrastructure, tunnel construction gradually extends to high-altitude areas such as the Qinghai-Tibet Plateau. Under the influence of environmental and climatic conditions and regional geological tectonic movement, tunnel construction in this area cannot copy the technology and experience of low-altitude areas, and special research work should be carried out in accordance with regional geological characteristics. Based on a tunnel of Gongyu Highway, the bolt support design of high-altitude tunnel is studied by numerical analysis with FLAC3D software. The results show that the arch bolt should be cancelled and the side wall and lock foot bolt should be strengthened in the bolt support of highway tunnel in high-altitude cold area. Then through multi-dimensional comparative analysis, the length, circumferential spacing and setting range of anchor rods in the carbonaceous shale highway tunnel system at high altitude and cold region, as well as the number, direction and length of anchor rods at lock feet are put forward, which provides technical support for the design and construction of the relying projects, and also provides reference for similar projects.
Sensitivity Analysis of Dynamic Characteristics of Steel Plate Composite Girder Bridge with Supported Cross Beam System
Authors: Dou Weiyu 
Published: September 2019

Abstract
A steel plate composite girder bridge with support beam system was selected in the case study and the software of SAP2000 was adopted to build its refined seismic finite element model. A sensitivity analysis about the dynamic characteristics of the bridge was carried out and the design parameters included relative stiffness ratio of beam to slab, shear stiffness of shear nails and steel beam. The results show that: the stiffness ratio of beam to plate has little influence on the low-order modes of structure, but more significant influence on the high-order modes. Furthermore, in the high order modes, the effect of the stiffness of concrete slabs on the dynamic characteristics of high order modes of structures is greater than that of the stiffness of steel girders. Large reduction of the stiffness of shear nails significantly affects the natural vibration period, the order of mode shapes and the mass participation coefficient. Its influence on the vertical dynamic characteristics of bridge is significantly greater than the dynamic characteristics in the longitudinal direction and the in the horizontal direction. Steel beams have little influence on the dynamic characteristics of structures.
Research on the Stress Variation Effect of Overburden Loads in Utility Tunnel Roof
Authors: Yao Wen , Ma Jianxun , Xu Xin 
Published: September 2019

Abstract
As an underground structure, the utility tunnel is subjected to the pressure of overburden soil. Calculation of the overburden pressure soil are different when the burial depth changes. In this paper, the calculation methods of soil loads are summarized. In view of utility tunnel, the ANSYS finite element analysis is adopted to analyze the pressure of the roof. When calculating the structural stress, the working condition is considered as the backfill after the excavation of the soil. Considering the stress variation of the roof edge of the structure with different burial depth, it can be found that compressive stress at 1/2 span is about 1.7-2.2 times of the tensile stress at the corner. With the increase of burial depth, the rate of increasing roof stress value decreases. When the burial depth reaches a certain depth, soil arching effect plays a role and the roof stress value tends to be stable. Some suggestions are given to the designers of the utility tunnel which can reduce the waste of building materials.
Numerical Researches on the Optimization of Construction Methods in Tunnels with Super Large Section
Authors: Xiaosong Tang , Yongfu Wang , Yanyan Li 
Published: September 2019

Abstract
At present, the selection of construction methods in the tunnels with super large sections often relies on the experience for lack of a definite and feasible method. Based on the design method of formation-structure tunnels, the paper adopts FEM strength reduction to conduct numerical researches on the optimization of construction methods in tunnels with super large section. Taking a tunnel with super large section in a subway station as example, the paper first carries out numerical simulation on arch-wall method and double sidewall pilot tunnel method. Then it compares and analyzes the calculation results of surrounding rock displacement, stress on anchors and surrounding rock stability during construction. Finally, the paper suggests double sidewall pilot tunnel method. The analysis on the calculation examples shows that numerical method can quantitatively and directly display the difference between various construction methods and realize the optimization of construction methods in tunnels with super large section.
Analysis of Causes of Valve Rod Fracture of Steam Turbine High Pressure Main Steam Valve
Authors: Zhan Tu , Fuhai Lin , zhouquan zhang 
Published: September 2019

Abstract
A 300MW sub-critical coal-fired thermal power plant steam turbine generator set # 1 high pressure steam valve stem is fractured. The turbine unit has been running 46000 hours before the crack happened. The chemical component was examined which was in the standard range. they observed the metallographic structure of the broken stem to find the nitriding treatment of fine grain martensite structure at surface area and lath martensite at central section, healthy structure condition. they also found the existing of circumferential oxidized cracks with white corrosion production. According to that, they believe it was caused by residual stress when grinding. Finally, SEM was used to observe the fracture to further confirm our ideas.
Research on Testing Methods of Inspection of Buckling-Restrained Braces
Authors: Chen Wulong , Lou Guobiao 
Published: September 2019

Abstract
Testing methods of inspection of buckling-restrained braces is specified in many technical specifications, but the existing specifications do not clearly indicate the connection type used for the specimen. There are three main connection types of buckling-restrained braces applied in engineering. This paper has carried out a large number of tests, focusing on the influence of different connection types on the test results. For the welded joints specimen, typical test results of mechanical properties of buckling-restrained braces were obtained. For the bolted joints specimen, slippage is likely to occur during the test; for the pin joints specimen, misalignment is likely to occur during the test and they are not suitable for use. In order to ensure the normal operation of the test and the comparison of the test results, it is not necessary to simulate the connection types when the test of buckling-restrained braces is performed. No matter which connection type of the buckling-restrained braces is used in engineering, the unified connection type is recommended in the test. It is recommended to use the welded joints.
Research and Application of Xin’anjiang Model Parameters Uncertainty Based on GLUE Algorithm
Authors: Chen Ce , Ge Shilei , Liu Lijun , Wu Yi 
Published: September 2019

Abstract
Uncertainty study of hydrological model is an important subject in hydrological science research. Uncertainty analysis of model parameters is one of the important contents of hydrological model uncertainty research. This paper takes Hongjiata watershed as the research object, uses GLUE algorithm to analyze the uncertainty of parameters of Xin’anjiang model, and determines the sensitivity and range of parameters through the distribution law of qualified parameters. The conclusion shows that the GLUE algorithm can improve the calibration efficiency of Xin’anjiang model parameters and narrow the range of values, which can provide reference for model application in other areas.
Summary of Study on Toppling Deformation of Rock Slope
Authors: Xie Xiao , Li Qi , Guowei Zhang 
Published: September 2019

Abstract
The toppling of anti-dip layered rock slope is a typical mode of rock slope failure. Because this kind of deformation phenomenon is very common in hydraulic engineering and highway engineering, it has been paid more and more attention by the engineering community. The deformation mode, factors affecting toppling rock slope and dumping deformation mechanism were described in this paper.
Study on Slip Effects of Simply-supported Composite Beams
Authors: Chen Xu , Zhou Weixia , Kong Luzhi 
Published: September 2019

Abstract
The condition of the rigid shear connector of composite beams hardly exists in practice and interface slip is common due to the elastic shear connector. However, the rigid connector is often assumed in the design. What relationships for slip-induced effects? Is it small enough to be neglected? The classical differential equation is used to calcultae slip effects exactly. Results show that the slip-induced deflection is above 20% and the risk of crack must be considered for the bottom of concrete slab in midspan.
Mathematic Solution of the Differential Equations on Composite Beam Creep
Authors: Peng Zuqiang , Chen Xu , Zhang Shengping 
Published: September 2019

Abstract
The mathematic manual drivation is conducted to solve the classical creep and shrinkage system of differential equations of composite beams. By the differential multipier, the differential system is similar to the algberic system and can be solved analytically. The analytical formulars of the reditributed internal forces are obtained and they are useful for further research although it is complicate. The results of deduced formulars have been compared with those obtained by computer software.