Top Read

Published in last 1 year |

In last 2 years |

In last 3 years |

All

Please wait a minute...


For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails

Select

Design and Implementation of Self-study Room Platform Based on Springboot and Uni-app Framework LI Jinzhong, HU Zhiming, CHEN Jiangang, CHEN Hanxuan, ZUO Zuo Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (2): 77-82.   DOI: 10.16046/j.cnki.issn2096-5680.2024.02.014 Abstract （529）      PDF（pc） （551KB）（126）       Knowledge map    Save At present, domestic education has begun to popularize online learning mode on a large scale. However, many existing online learning platforms gradually appear the problem of excessive entertainment and social seriousness, which seriously violatesthe original intention of the birth of online learning platforms. In addition, the platform has relatively limited functions, making it difficult to comprehensively manage the learning status of users, and there is also a considerable shortage of products on the market that meet users'needs. Therefore, this paper designs and develops a mobile self-study room platform based on SpringBoot and Uni-App frameworks, which is specially designed to provide users with learning state management services. The main functions of the platform include five functional modules: self-study state management, learning dynamic management, leaderboard, notepad, and user information management. The platform can provide users with a series of learning state management services to help them develop a good learning self-control, cultivate students' independent learning ability, and improve learning efficiency. Reference | Related Articles | Metrics | Comments（0）

Select

TMulti-target Detection of Smart City Based on Improved YOLOv5 Algorithm WANG Jichao, TANG Yong, HUI Zhenqiao, LIU Haozhuo, LIU Bing Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (3): 24-29.   DOI: 10.16046/j.cnki.issn2096-5680.2024.03.005 Abstract （222）      PDF（pc） （342KB）（41）       Knowledge map    Save As the core technology of smart city construction, multi-object detection plays an irreplaceable role in establishing city map, mining city operation law and improving city operation efficiency. Based on the excellent target detection model YOLOv5, this paper selects typical scenes in cities, takes pedestrians and vehicles as detection targets, and improves the SPP module of the neck part of the original lightweight version algorithm to ensure detection speed and increase detection accuracy. Then, the improved algorithm and YOLOv5-s algorithm were deployed on the edge devices of smart cities at the same time, and a comparative test was conducted. Experimental results show that compared with YOLOv5-s algorithm, the improved algorithm in this paper can improve the multi-target detection accuracy by 15.7% when the speed remains basically unchanged, which solves the problem that the detection rate and accuracy of edge devices in smart cities cannot meet the requirements at the same time to a certain extent, and provides a theoretical reference and method basis for multi-target real-time detection in smart cities. Reference | Related Articles | Metrics | Comments（0）

Select

Innovative Design of Fighting Robot Based on AHP/QFD/TRIZ Theory ZHAGN Tiebi, ZHANG Wanming, LI Wenbin, SHANG Jiayao, SHAN Jingcai Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (3): 11-18.   DOI: 10.16046/j.cnki.issn2096-5680.2024.03.003 Abstract （178）      PDF（pc） （558KB）（22）       Knowledge map    Save To solve the complex working conditions of fighting robots, improve their ability to hit and withstand hits, and optimize the product innovation design process of fighting robots, a design method for fighting robots based on AHP/QFD/TRIZ theory is proposed.Firstly, user needs are obtained through questionnaire surveys and interviews with customers. The hierarchical analysis method (AHP) is used to sort the importance of the needs. Then, the quality function deployment (QFD) theory is applied to match user needs with technical quality indicators, and build a quality house (HOQ) model. Finally, the conflict resolution principle in TRIZ theory is used to solve the conflicts found in the quality house, and obtain product innovation design plans to provide theoretical support for the innovative design of fighting robots. Experimental data shows that under the premise of ensuring strength, the designed scheme can reduce overall weight and increase speed. The design method based on AHP/QFD/TRIZ theory is used to innovatively design products for fighting robots, which improves product performance and customer satisfaction. Reference | Related Articles | Metrics | Comments（0）

Select

Design of Sewage Automatic Control System Based on KingView 7.5 LI Xiaoyan Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (2): 72-76.   DOI: 10.16046/j.cnki.issn2096-5680.2024.02.013 Abstract （177）      PDF（pc） （339KB）（20）       Knowledge map    Save The system uses KingView 7.5 configuration software as the development platform, s7-300 PLC as the core of the system. Various sensor signals in the field equipment layer was acquired by distributed I/O, and after filtering, amplifying, A/D conversion and other operations, the signals are transmitted to the upper computer through the Ethernet. Using the CPU314C-2PN/DP of Siemens S7-300 PLC series as the central control equipment, the automatic control of sewage treatment system and real-time monitoring of detection parameters and running parameters was realized,and the system equipment running status and automatic fault alarm can be recorded.This control system uses industrial computer to remote control the sewage treatment system, which can monitor the sewage treatment process intuitively and dynamically. It has the advantages of low cost, highly automatic, stability, reliability and easy maintenance. Reference | Related Articles | Metrics | Comments（0）

Select

Optimization of Irrigation Schedule for Wheat Fields in North China Plain Based on WHCNS Model YU Qing, WANG Yahui, FENG Yu, ZHOU Yuanhang, FENG Yixiang Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (3): 1-6.   DOI: 10.16046/j.cnki.issn2096-5680.2024.03.001 Abstract （143）      PDF（pc） （357KB）（40）       Knowledge map    Save Grain production in North China is prominent in the whole country, but there is a serious shortage of agricultural water. In this study, winter wheat in North China Plain was taken as the research object. Firstly, the experimental data of North China in 2004 and 2006 were used to analyze the water movement law and utilization efficiency under the traditional irrigation system. Combined with WHCNS model, different combination irrigation scenarios were simulated (the total irrigation amount was set to change from 100mm to 450mm, and the irrigation times were increased to 5 times), and the irrigation amount was optimized by using the comprehensive index method. Finally, 350mm is the best irrigation schedule in the simulation. Reference | Related Articles | Metrics | Comments（0）

Select

Building Solid Waste Recycled Concrete Carbonation Resistance Research ZHANG Xuanming, LIU Mingyang Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (2): 8-12.   DOI: 10.16046/j.cnki.issn2096-5680.2024.02.002 Abstract （143）      PDF（pc） （319KB）（14）       Knowledge map    Save By using orthogonal experimental method, the carbonation resistance of recycled concrete with waste concrete as coarse aggregate was studied, with water cement ratio, replacement rate of recycled coarse aggregate, and fly ash content as influencing factors. Intuitive analysis method is used to analyze the carbonization depth of different factors at different ages, and range analysis method is used to determine the overall optimal level combination. The results indicate that under the influence of a single factor, the increase in water cement ratio, replacement rate of recycled coarse aggregate, and fly ash production will all increase the carbonation depth of recycled concrete based on building solid waste. Among them, the water cement ratio has the most significant impact on the carbonation depth of building solid waste and recycled concrete. When the water cement ratio is 0.5, the replacement rate of recycled coarse aggregate is 25%, and the fly ash content is 10%, the carbonation resistance of the recycled concrete based on building solid waste is the best. Reference | Related Articles | Metrics | Comments（0）

Select

Research on Evaluation of Light Compaction Effect of Reed Reinforced Soil LU Wei, REN Yongwang, XU Hunan, SONG Xinghai, JIN Kanhui Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (2): 1-7.   DOI: 10.16046/j.cnki.issn2096-5680.2024.02.001 Abstract （139）      PDF（pc） （763KB）（27）       Knowledge map    Save This article carried out a series of experimental studies on the strength and deformation of saline soil in Bohai New Area. First, the saline soil in the Bohai New Area was evenly mixed with reeds of different lengths and reinforcement rates, and a light compaction test was carried out based on a certain compaction power. Then, in order to test the compaction effect, it was subjected to an unconfined compressive strength test. The test results show that the mass reinforcement rate has a significant impact on the test results. The maximum dry density will gradually decrease as the reinforcement rate increases. The decrease range is between 0.01 g/cm3 and 0.02 g/cm3 per level. At the same time, the mass reinforcement rate also has a great influence on the optimal moisture content. The optimal moisture content will increase as the reed content increases. This trend will decrease as the reinforcement rate increases. When the mass reinforcement rate reaches 0.3%~0.35%, the maximum difference between the optimal moisture contents is only 0.38%. At this time, the influence of the reed content on the optimal moisture content can be ignored. Similarly, the length of reinforcement also has a significant impact on the compaction test. As the maximum dry density of reed-reinforced soil decreases with the length of reinforcement, the dry density will gradually decrease in a nearly linear trend. The dry density decreases by approximately 0.01~0.02 g/cm3 at each level of reinforcement length. When the reinforcement length is small, the optimal moisture content shows a nearly linear growth trend with the reinforcement length. When the reinforcement length reaches 50 mm, the change of the optimal moisture content is relatively stable due to the influence of the reinforcement rate. When the reinforcement length is too long, Excessive mass reinforcement rate may lead to a decrease in the optimal moisture content. The most obvious position appears at the length of 70 mm and the reinforcement rate of 0.35%. According to the unconfined compressive strength test, we can regard the reed reinforcement length as 50 mm and the mass reinforcement rate as 0.25% as the optimal reinforcement length and mass reinforcement rate. Reference | Related Articles | Metrics | Comments（0）

Select

Automated Application of Blasting Vibration Monitoring in Henan Wuyue Pumped Storage Power Station WU Zuosheng, ZHOU Guangyu, LI Zhuangzhuang, WANG Shiyang Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (3): 7-10.   DOI: 10.16046/j.cnki.issn2096-5680.2024.03.002 Abstract （138）      PDF（pc） （206KB）（17）       Knowledge map    Save To ensure that the blasting construction during tunnel excavation does not affect the safety and stability of surrounding civil buildings, an automated blasting vibration monitoring system was developed based on network blasting vibration logger. The system uses advanced sensor technology, efficient data processing algorithms and intelligent interactive interfaces to collect and analyze vibration data in real time. Through this system, real-time monitoring of changes in blasting vibration data can be achieved, providing accurate and reliable feedback information to relevant units, thereby ensuring construction safety and improving construction efficiency. This automated monitoring system played an important role in the tunnel excavation construction in Henan Wuyue Pumped Storage Power Station. Reference | Related Articles | Metrics | Comments（0）

Select

Study on Mechanics and Settlement Characteristics of Solidified Coastal Saline Soil PEI Weibin, SONG Yang, WANG Weihao, QI Ziyi, YAO Weihua, MU Jingzhuo Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (3): 30-37.   DOI: 10.16046/j.cnki.issn2096-5680.2024.03.006 Abstract （134）      PDF（pc） （619KB）（44）       Knowledge map    Save The coastal saline soil, being a unique type of soil, exhibits unfavorable engineering characteristics such as solution subsidence, salt swelling, and corrosion. In order to investigate the suitability of lime, fly ash and cement solidified material for improving subgrade soil composed of saline soil, tests were conducted on liquid plastic limit, compaction, unconfined compressive strength, triaxial compression, and solution subsidence. The impact of different conditions on physical indices, mechanical properties, and settlement characteristics of the improved saline soil was analyzed. The results indicate that an increase in the content of curing agent leads to a linear rise in both liquid and plastic limits while reducing the plasticity index. Additionally, incorporating the curing agent decreases the maximum dry density of saline soil without significantly altering its optimum moisture content. Both curing agent content and age exert significant influences on the mechanical properties of coastal saline soil. When the curing agent content is below 14%, an increase in its concentration results in reduced settlement amount. Furthermore, increasing water content and compaction level effectively mitigate settlement in cured saline soils. Reference | Related Articles | Metrics | Comments（0）

Select

Preparation of Inorganic Self-repairing Microcapsules and Properties of Cement Mortar Specimens FU Jianhang, WU Jinhua, GUO Hengyu, YANG Xiaonan, LIU Jingtian Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (3): 45-49.   DOI: 10.16046/j.cnki.issn2096-5680.2024.03.008 Abstract （134）      PDF（pc） （377KB）（21）       Knowledge map    Save The mechanism of the microcapsule self-repairing technology for cement mortar was introduced,the microcapsules of polyvinyl alcohol coated inorganic expanded perlite were fabricated by vacuum adsorption, and the self-repairing cement mortar was made by adding this microcapsule into the cement mortar in this paper. Through studying the influence of the microcapsules on the strength and workability of the cement mortar, the optimal dosage of the microcapsules was determined to be 1%. The repair performance of the self-repairing cement mortar for load-induced damage was evaluated: the repair rate of 60% flexural strength after 28 days of preloading for load-induced damage was 16.25%, and the repair rate of 60% compressive strength after 28 days of preloading was 3.43%. Reference | Related Articles | Metrics | Comments（0）

Select

Research on Independent Reference Model-based Anti-interference Backstepping Control LI Jun, LI Guoming, ZENG ZhengLin, HAN Chuanxiang Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (3): 19-23.   DOI: 10.16046/j.cnki.issn2096-5680.2024.03.004 Abstract （123）      PDF（pc） （316KB）（9）       Knowledge map    Save An anti-interference backstepping control method based on an independent reference model was proposed, which performs well in the application of classic single stage linear inverted pendulum systems. Firstly, a backstepping controller for a single stage linear inverted pendulum is designed and an independent reference model of the system is obtained. At his point, if the single stage linear inverted pendulum is disturbed, it will deviate from the ideal value of the independent reference model. To improve the anti-interference performance of a single stage linear inverted pendulum, a generalized state error is introduced, which refers to the error between the independent reference model output and the actual system output. Then, based on the generalized state error and backstepping control method, the controller is designed using Lyapunov stability theory. Finally, a single stage linear inverted pendulum anti-interference backstepping controller based on an independent reference model was obtained. The simulation results show that the controller can effectively suppress the influence of external interference on the single stage linear inverted pendulum, and has strong robustness and anti-interference ability. Reference | Related Articles | Metrics | Comments（0）

Select

Development and Application of Photovoltaic Power Generation and Solid Heat Storage Combined Heating System PEI Wenhao, JIA Hongyuan, YAN Mengzhe, DU Haohao Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (2): 49-53.   DOI: 10.16046/j.cnki.issn2096-5680.2024.02.009 Abstract （123）      PDF（pc） （332KB）（15）       Knowledge map    Save On the basis of promoting the joint application of solar energy and conventional energy, this paper proposes a photovoltaic power generation and solid heat storage co-heating system, and takes an enterprise in Zhangjiakou as an example to design a combined heating system. Using the solar radiation data of Zhangjiakou Meteorological Station collected by Meteonorm, the power generation of the company's photovoltaic system was simulated and combined with solid heat storage. Through the comparative analysis with its original heating system, it is found that the photovoltaic power generation and solid heat storage combined heating system can be profitable in the first two years, and the operating cost in the 25th year is 128,000 yuan, which is much lower than the original heating system, and can also reduce the emission of pollutants. Reference | Related Articles | Metrics | Comments（0）

Select

Analysis of Tilting Mold Construction Technique for High Pier of Super Large Bridge LI Wei Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (2): 37-41.   DOI: 10.16046/j.cnki.issn2096-5680.2024.02.007 Abstract （120）      PDF（pc） （381KB）（6）       Knowledge map    Save In order to further study the construction technology of high pier of super large bridge, taking the Taipeng section LJ08-2 of Yinkun Expressway as an example, the implementation points and results of high pier construction of super large bridge are analyzed. In view of the key links and difficulties in the construction of high pier of super large bridge, effective construction measures are adopted. The practice shows that the construction of the high pier of the super bridge can be completed efficiently by using the large fixed steel formwork (tilting mold) as the means of forming the high pier of the super bridge, controlling the formwork lifting and concrete pouring, and controlling the line shape of the high pier. And to achieve the goal of 100% quality acceptance, saving the comprehensive benefit of 124,800 yuan for the enterprise, not only ensures the construction progress and safety of the large bridge high pier, but also achieves good economic and social benefits, which has reference value and application guidance significance for similar projects. Reference | Related Articles | Metrics | Comments（0）

Select

Research on the Activation and Regeneration Strategy of a Commercial Space in a Square in Tianjin ZHOU Shiqi, WANG Moyu, LIU Dandan Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (2): 67-71.   DOI: 10.16046/j.cnki.issn2096-5680.2024.02.012 Abstract （115）      PDF（pc） （225KB）（7）       Knowledge map    Save With the continuous development and improvement of cities, the renewal and renovation of old urban spaces have gradually become an unavoidable problem, including the redevelopment of certain urban areas, the improvement of urban facilities and buildings, the protection and reuse of historical blocks and buildings, and the micro renewal of urban community spaces. At the same time, there are many different types and directions in the practical level of urban renewal, each with its own uniqueness, such as the utilization and transformation of urban industrial heritage, the activation and regeneration of urban commercial space, and the renewal and transformation of urban cultural space. The specific strategies and methods for dealing with different types of updates and renovations will vary. But the ultimate goal is to enable these spaces to meet current and future usage needs, improve spatial quality, optimize experience, enhance regional vitality, drive economic growth, and drive urban development. From the perspective of art and design, combined with the case of activation and regeneration of a commercial space in a square in Tianjin, the article proposes the difficulties in the process of updating and activating, as well as the importance of operating art and design content. Reference | Related Articles | Metrics | Comments（0）

Select

Design of a High-precision Remote Greenhouse Control System Based on the Internet of Things under the B/S Architecture WANG Zhaohui Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (4): 50-55.   DOI: 10.16046/j.cnki.issn2096-5680.2024.04.009 Abstract （113）      PDF（pc） （1041KB）（79）       Knowledge map    Save The Internet of Things technology is adopted to build a high-precision temperature control problem for remote greenhouse. The network hardware architecture is designed and configured with a temperature control system based on greenhouse information acquisition sensors (temperature and humidity sensors, light sensors, CO2 sensors and soil moisture sensors) and controller (the main control chip is STM32F103VET6). Firstly, a greenhouse control network software framework was built based on B/S architecture, and noise information collected in greenhouse information was removed by filtering algorithm. Combined with controller characteristics and PID control theory, a greenhouse control algorithm was developed, and remote control of greenhouse temperature, humidity, light, CO2 concentration, soil moisture and other environmental factors and the design and operation of greenhouse control system were realized by implementing the developed algorithm. The experimental results show that the maximum signal to noise ratio of greenhouse information is 92.15dB after the design system is applied, and the calculated result of temperature control adjustment is consistent with the actual adjustment amount. How to further reduce the network delay and improve the control accuracy of greenhouse temperature is the key aspect of future system optimization and improvement. Reference | Related Articles | Metrics | Comments（0）

Select

Experimental Study on Heating Process of Direct Floor Radiant Heating with Air Source Heat Pump NIU Jianhui, WANG Haichao, LV Tianshu, AN Zelong Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (3): 61-67.   DOI: 10.16046/j.cnki.issn2096-5680.2024.03.010 Abstract （110）      PDF（pc） （504KB）（10）       Knowledge map    Save The air source heat pump direct floor radiant heating system directly heats the floor with refrigerant as the heat medium, which has the advantages of simple system and good heat transfer effect. An experimental device of capillary floor radiant heating with air source heat pump was built, and the heating process experiment of capillary floor radiant was carried out at different outdoor ambient temperatures. The experimental results show that when the outdoor temperature is -5 ℃, it takes about 120 minutes for the floor temperature to stabilize. The temperature difference between the refrigerant vapor inlet and outlet ends of the same capillary wall is relatively small at 1.55 ℃, while on the surface of a 20mm thick cement floor, the temperature difference is 1.73 ℃. When the outdoor ambient temperature is -10 ℃, the floor heating rate is the slowest at 1.5 ℃/10 min, and the indoor air heating rate is 0.9 ℃/10 min. At this time, the heating COP of the system is stable at 3.06. Reference | Related Articles | Metrics | Comments（0）

Select

Research on the Current Status and Effectiveness Evaluation of Water-saving Society Construction in Hebei Province LAN Hongkuan, WANG Fengchun , CHENG Huaifeng, TIAN Shupeng Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (2): 59-66.   DOI: 10.16046/j.cnki.issn2096-5680.2024.02.011 Abstract （103）      PDF（pc） （667KB）（17）       Knowledge map    Save Implementing the policy of water saving priority is and will be the guiding principle for water management in China. The principal component analysis method and data comparison were used to study the effectiveness and influencing factors of water-saving society construction in Hebei Province. Some suggestions were put forward. It was found that the evaluation index of water conservation effectiveness in Hebei Province was at the middle and upper level, and the main factors affecting the water use of various industries included the effective irrigation area, cement and coke yield, completed area of residential buildings, and the green coverage of built-up areas,etc. Some suggestions were put forward based on the water-saving status, such as optimizing and adjusting the structure of crop varieties, developing efficient water-saving irrigation, adjusting the industrial structure, eliminating backward production capacity, building smart water management platforms, and improving public' awareness of water conservation. Reference | Related Articles | Metrics | Comments（0）

Select

Research on Slope Support Construction Technology for Road Reconstruction and Expansion in Complex Geology LI Yanyan Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (2): 13-18.   DOI: 10.16046/j.cnki.issn2096-5680.2024.02.003 Abstract （101）      PDF（pc） （370KB）（8）       Knowledge map    Save In order to solve the problems of effective protection and safe excavation in the construction of complex geological slope support, the construction technology of slope support for road reconstruction and expansion is proposed. Lizheng software is applied to repeatedly calculate slope support and various parameters under excavation height, and a series of data are obtained. A reasonable calculation formula is obtained for the optimal cutting height of support through the non-linear fitting function of multiple functions in Matlab. After determining the optimal cutting height and reasonable slope surface shape, the road to expand the slope is excavated, geological information isdynamically obtained, and the limit equilibrium method is applied to implement dynamic stability evaluation of the slope. Based on the evaluation results, advanced support for road reconstruction and expansion slopes is implemented, and optimized support schemes for unstable slopes are proposed. After verifying its rationality through numerical analysis methods, the support plan will be implemented and the next stage of excavation operations will proceed. Stable slopes will directly proceed to the next stage of construction. The application results show that one month later, the deformation in the X, Y, and Z directions is less than 2.5mm, achieving good construction results. Reference | Related Articles | Metrics | Comments（0）

Select

Design and Experiment of Screw Extruder for Paint Slag ZHANG Zhen, ZHANG Wanming, ZHANG Pengcheng, LI Wenbin, MA Yibo Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (3): 73-77.   DOI: 10.16046/j.cnki.issn2096-5680.2024.03.012 Abstract （98）      PDF（pc） （258KB）（16）       Knowledge map    Save A screw extruder was developed to treat paint slag by extrusion, which is a solid-liquid separation method to reduce the moisture content of paint slag. The design of the key components such as screw shaft and screen was carried out. The moisture content and discharge amount of paint slag were used as assessment indicators for a dehydration experiment with water-based paint slag as raw material. As the outlet pressure increased, the moisture content and discharge amount per unit time of paint slag decreased, according to the results. The outlet pressure was set to 0.7 MPa, considering both the dehydration effect and device operation efficiency. The moisture content of paint slag was 54% and the discharge amount was 2.2 kg/h at this point. By reducing the moisture content by about 36%, the screw extruder can dehydrate paint slag efficiently, which reduces hazardous waste treatment costs and circulating water loss for sheet metal spraying enterprises. Reference | Related Articles | Metrics | Comments（0）

Select

Pre Arch Control Technology of Double Layer Bailey Beam Support Method for Cast-in-place Simply Supported Box Girder JI Zhimeng Journal of Hebei University of Water Resources and Electric Engineering    2024, 34 (2): 32-36.   DOI: 10.16046/j.cnki.issn2096-5680.2024.02.006 Abstract （96）      PDF（pc） （506KB）（6）       Knowledge map    Save With the widespread application of the Bailey beam support method in the construction of cast-in-place box girders, especially in the design of double layered Bailey beams with single span when crossing existing highways and rivers, it is particularly important to control the pre arch degree based on the pre compression test. In this article, combined with the pre compression test of the double layered Bailey beam support method for the Yingpanshan Bridge on the Menghua Railway, we will elaborate on the process, purpose, and significance of the pre compression test. By organizing and analyzing the preloading data, the required pre arch degree for the template was determined, providing a basis for guiding the construction of box girder concrete pouring. It is hoped that this can provide some reference experience for similar bracket construction in the future. Reference | Related Articles | Metrics | Comments（0）