Study On Influence Of Freeze ⁃Thaw Cycles On Shear Properties Of Fly Ash Modified Saline Soil,
2023
College of Civil Engineering, Northeast Forestry University, Harbin, Heilongjiang 150040, China
Study On Influence Of Freeze ⁃Thaw Cycles On Shear Properties Of Fly Ash Modified Saline Soil, Cheng Zhuo, Cui Gaohang, Gao Zening, Hou Zhao, Gang Haohang
Journal of China & Foreign Highway
In order to explore the shear strength of fly ash-modified saline soil subgrade under the freeze-thaw cycle, saline soil samples from Suihua–Daqing Expressway were selected for direct shear test under different fly ash contents. The results show that the cohesive force and internal friction angle of the saline soil decrease after several freeze-thaw cycles. With the increase in fly ash content, the internal friction angle, cohesive force, and shear strength of the improved saline soil increase first and then decrease. When the fly ash content is 15%, the cohesive force, internal friction angle, and other mechanical indexes of the saline …
Construction And Management Practice Of Green Highways In Qinling Mountains,
2023
1. China Academy of Transportation Sciences, Beijing 100029, China;
Construction And Management Practice Of Green Highways In Qinling Mountains, Gao Shuohan, Zhang Lei, Zhao Fuqiang, Wang Dong, Li Gang, Liu Xuexin, Yao Jialin
Journal of China & Foreign Highway
In order to practice the concept of green development and promote the transformation and upgrading of highways in Qinling Mountain areas, the paper took Taibai–Fengxian Expressway, a typical demonstration project of green highway in Shaanxi Province as the basis to explore the practical experience of green highway construction suitable for Qinling Mountain areas. The project is located in the hinterland of the Qinling Mountains, with a sensitive water environment, important ecological functions, and rich tourism resources. In addition, it adopts EPC mode. Through the all-round and whole-process implementation of the green concept, the project was planned and launched from the …
Numerical Analysis Of Structural Characteristics Of Prefabricated Ecological Grid Retaining Walls,
2023
1. School of Civil Engineering, Shaoxing University, Shaoxing, Zhejiang 312099, China; 2. School of Engineering, Hangzhou City University, Hangzhou, Zhejiang 310015, China;
Numerical Analysis Of Structural Characteristics Of Prefabricated Ecological Grid Retaining Walls, Wang Xinquan, Zhu Cong, Huang Tianyuan, Diao Hongguo, Peng Xijian
Journal of China & Foreign Highway
The retaining wall is a common slope protection structure. In view of the current insufficient greening and high prefabricated retaining walls, prefabricated ecological grid retaining walls with high construction efficiency and greening features emerge. In order to explore the mechanical characteristics and influencing factors of prefabricated ecological grid retaining walls, Abaqus finite element software was used to discuss the mechanical characteristics of prefabricated ecological grid retaining wall columns and inclined shelves with different embankment heights and different fillings. The results show that different fill heights have different effects on the lateral displacement of the column, and the effect of fill …
Macro And Micro Analysis Of Influence Mechanism Of Anti⁃Slide Pile Position On Slope Stability,
2023
1. Power China Roadbridge Group Co., Ltd., Beijing 100048, China;
Macro And Micro Analysis Of Influence Mechanism Of Anti⁃Slide Pile Position On Slope Stability, Liu Ping, Wang Meijing, Zhang Shaoqiang, Zhang Yongsheng, Wang Denghua, Li Dongdong
Journal of China & Foreign Highway
In order to study the influence mechanism of anti-slide pile position on the stability of the slope and optimize the supporting parameters of anti-slide piles reasonably, a three-dimensional continuous and discrete coupled numerical model of the slope was established based on the finite difference theory and discrete element theory of a highway cut slope in southwest China. The influence mechanism of anti-slide pile position on the stability of the cut slope was analyzed from macro and micro perspectives. The results show that the force chain of particles on the sliding surface is thin at the top and dense at the …
Study On Improvement Of Early Skid Resistance Of Sma Asphalt Pavement Based On Spreading Grit,
2023
1. Shandong Institute of Transportation Science, Jinan, Shandong 250031, China; 2. Key Laboratory of Highway Maintenance Technology and Transportation Industry (Jinan), Jinan, Shandong 250031, China;
Study On Improvement Of Early Skid Resistance Of Sma Asphalt Pavement Based On Spreading Grit, Jiang Zhaowei, Wei Jincheng, Liu Hang, Sun Qiang, Li Xia
Journal of China & Foreign Highway
The early skid resistance of SMA 13 pavement is poor. To address this issue, the existing research results were analyzed, and physical detection was conducted. It was found that the large structure pavement failed to provide good early skid resistance detection value. Based on the principle of spreading abrasive materials, two methods to improve the early skid resistance of SMA pavement were proposed. The particle size of abrasive material was determined to be 2.36–4.75 mm, and the spreading amount was 0.82 kg/m2, which verified the safety of the methods. The test results show that the two methods can slightly improve …
Crack Resistance Of Basalt Fiber Asphalt Pavement Under The Coupling Effect Of Low Temperature⁃Load In Heavy Freezing Area,
2023
1. Key Laboratory of Highway Engineering in Special Areas, Ministry of Education, Chang’an University, Xi’an, Shaanxi 710064, China
Crack Resistance Of Basalt Fiber Asphalt Pavement Under The Coupling Effect Of Low Temperature⁃Load In Heavy Freezing Area, Guo Yinchuan, Hao Chenwei, Guo Han, Fan Li, Shen Aiqin, Wang Lusheng
Journal of China & Foreign Highway
In view of the cold working environment and road diseases of asphalt pavement in the heavy freezing area of Inner Mongolia, a control index of pavement structure based on crack resistance was proposed. The calculation models of the newly built basalt fiber asphalt pavement structure and the pavement after cracks were established by using Ansys finite element software. The mechanical parameters, thermophysical parameters, and other parameters of the basalt fiber asphalt pavement were determined through laboratory tests, and the crack resistance indexes under the coupling action of low temperature and load were calculated, respectively. The fatigue life of basalt fiber …
Detailed Structure Of Double ⁃Layer Porous Asphalt Pavement Under Three Paving Technologies,
2023
1. Shanghai General Institute of Urban Construction Design and Research (Group) Co., Ltd., Shanghai 200125, China;
Detailed Structure Of Double ⁃Layer Porous Asphalt Pavement Under Three Paving Technologies, Zhang Zhenshan, Liao Gongyun, Wang Can, Zhang Yi, Cai Yang, Fang Xin, Wu Wei
Journal of China & Foreign Highway
For three kinds of construction technologies of double-layer drainage pavement (traditional “hot + cold” paving technology, “hot + warm” paving technology, and “hot + hot” integrated molding technology), the discrete element method and laboratory test were used to make plate specimens and cylindrical specimens, respectively, and the interlayer morphology of double-layer drainage pavement under the three kinds of construction technologies was compared. Based on the virtual shear test and laboratory direct shear test, the effects of construction technologies and amount of adhesive oil on the interlayer shear strength of double-layer drainage pavement were analyzed. By means of visualization, the distribution …
Design And Stress Analysis Of Baqiutian Jointless Arch Br Idge In Yunnan,
2023
1. College of Civil Engineering, Fuzhou University, Fuzhou, Fujian 350108, China; 2. School of Civil Engineering, Fujian University of Technology, Fuzhou, Fujian 350108, China;
Design And Stress Analysis Of Baqiutian Jointless Arch Br Idge In Yunnan, Chen Baochun, Sun Tongqing, Huang Qingwei, Han Yu, Shi Zhi
Journal of China & Foreign Highway
The bridge without expansion joints, with the expansion device removed, can completely solve the maintenance problem of the expansion device and is sustainable. Its application is mainly in beam bridges and relatively few in arch bridges. In this paper, the Baqiutian Bridge in Yunnan Province was taken as an example, which is an upper bearing arch bridge. The arch path structure is directly connected with the two approach spans to form a continuous structure and extends to the guide plate (approach slab) behind the platform, thus eliminating the expansion joints of the whole bridge floor and making it an arch …
Analysis And Optimal Adjustment Of Manufacturing Errors Of Main Girder Of Long ⁃Span Steel Box Cable ⁃Stayed Bridge,
2023
School of Civil Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China
Analysis And Optimal Adjustment Of Manufacturing Errors Of Main Girder Of Long ⁃Span Steel Box Cable ⁃Stayed Bridge, Tu Guangya, Zhou Zhizhe
Journal of China & Foreign Highway
In order to study the influence of the random manufacturing error of the main girder permitted by the research specification on the alignment of the finished long-span steel box cable-stayed bridge, guided by the adaptive stress-free configuration construction control theory, the Shishou Yangtze River Highway Bridge, a long-span twin-tower cable-stayed bridge, was studied. The influence and propagation characteristics of the random error effect of the main girder members on the main structure of the cable-stayed bridge were analyzed. The adverse effects of random manufacturing errors of the main girder on the structure of the cable-stayed bridge were studied. The results …
Design Of Super Large Cantilever Wing ⁃Box Girder Bridge,
2023
Wuhan Branch of China Railway Major Bridge Reconnaissance & Design Institute Co., Ltd., Wuhan, Hunan 410074, China
Design Of Super Large Cantilever Wing ⁃Box Girder Bridge, Zhong Hao
Journal of China & Foreign Highway
In recent years, with the rapid development of urban bridge construction, the bridge inevitably needs to cross the existing railway and road in the construction project. This kind of bridge has the characteristics of a large span and limited pier space. At the same time, in order to meet the increasing traffic demand, the transverse width of the bridge is increasing, so the application of large cantilever wing-box girder structures is becoming more and more extensive. Based on the overspan railway bridge project of the northern section of the Wuhan Fourth Ring Line (Wuhu–Wujiashan), this paper introduced the design difficulties …
Study On Reasonable Seismic System Of Long ⁃Span Concrete Beam Bridge In Strong Earthquake Areas,
2023
1. China Highway Engineering Consulting Corporation, Beijing 100089, China;
Study On Reasonable Seismic System Of Long ⁃Span Concrete Beam Bridge In Strong Earthquake Areas, Yu Deen, Han Shanjian, Sun Pingkuan
Journal of China & Foreign Highway
In this paper, a three-dimensional finite element dynamic model of the Longtang Nandujiang Bridge in Hainan Province was established. Firstly, the selection of ground motion input and the establishment of the finite element model were introduced. Secondly, the influence of different design parameters (support radius) of the friction pendulum bearing on the seismic response of the bridge was discussed, and the optimal bearing parameters suitable for the bridge were obtained. Finally, the seismic responses of the bridge under three different constraint structures, namely conventional constraint system, seismic isolation system of friction pendulum bearing, and rigid frame bridge system, were compared. …
Calculation Of Arch Rib Installation Alignment Of Large Span Cable Hoisting Arch Bridge,
2023
1. Chongqing Jiaotong University, Chongqing 400067, China; 2. China Merchants Chongqing Communications Technology Research & Design Institute Co.Ltd., Chongqing 400067, China;
Calculation Of Arch Rib Installation Alignment Of Large Span Cable Hoisting Arch Bridge, Xiong Shaohui, Guo Xin, You Zuoqiao
Journal of China & Foreign Highway
Cable hoisting method is the most important construction method for long-span arch bridges. In the process of arch rib lifting, the partial consolidation of the joint caused by temporary bolt connection, the deflection of the tower caused by the temporary construction load of the main cable, and the free expansion of the anchor cable and the buckle cable caused by temperature change will have a great influence on the installation alignment of the arch rib. In this paper, a two-element model method considering stiffness loss was used to calculate the correction value of the arch rib installation alignment more accurately …
Analysis Of Installation Method And Error Control Of Steel Girder Of Steel ⁃Concrete Composite Girder Cable ⁃Stayed Bridge,
2023
1. Hunan Road and Bridge Construction Group Co., Ltd., Changsha, Hunan 410018, China;
Analysis Of Installation Method And Error Control Of Steel Girder Of Steel ⁃Concrete Composite Girder Cable ⁃Stayed Bridge, Xiong Xianyong, Fu Yajun, Huang Gen
Journal of China & Foreign Highway
Compared with cable-stayed bridges with pure steel girders, the installation of a steel main girder of the steel⁃concrete composite girder cable⁃stayed bridge is more complicated, and the installation error control is more difficult. In this paper, the composite girder with a double box section was taken as the research object, and a finite element model was established to compare the installation methods of steel main girders. The best installation method was selected according to the principle of safety loading, and the causes of the installation errors of steel main girders were analyzed. The corresponding error control methods were proposed.
Cable⁃Stayed Bridge Of Cable Auxiliary Beam Arch Pylon ⁃Key Technologies Design Of Meishan Minjiang Bridge,
2023
T.Y. Lin International Engineering Consulting (China) Co., Ltd., Chongqing 401121, China
Cable⁃Stayed Bridge Of Cable Auxiliary Beam Arch Pylon ⁃Key Technologies Design Of Meishan Minjiang Bridge, Ma Zhendong, Lai Yaping, Chen Jiayong
Journal of China & Foreign Highway
The newly built Minjiang Bridge in Meishan City, Sichuan Province applies the concept of cable-assisted girder bridge. P4 steel arch tower combined with three-stage balanced double-plane cable and P3 and P5 auxiliary towers combined with thin cable of single cable plane were used to assist the load on the beam body, making the 2.5 m-high concrete main beam meet the requirements of the main span of 2 × 120 m. Through the analysis of the bearing force, the angle between the double-limb arch tower was 43.6°, and two pairs of cables were set in the auxiliary tower to achieve the …
Aesthetic Design Of Hechuan Qujiang Landscape Bridge,
2023
T.Y. Lin International Engineering Consulting (China) Co., Ltd., Chongqing 401121, China
Aesthetic Design Of Hechuan Qujiang Landscape Bridge, Zheng Guangqin, Chen Jiayong, Li Yue, Lai Yaping, Qiao Yunqiang
Journal of China & Foreign Highway
Hechuan Qujiang Landscape Bridge is located at the junction of Qujiang River and Jialing River. It is a 1 × 400 m simple supported single-cable surface ground anchor suspension bridge. The main girder is a steel box girder arranged with curved branches. One side is the highway system to meet the needs of motor vehicles across the river, and the other side is the greenway system to meet the needs of pedestrians and non-motor vehicles. In the design process, the aesthetic design of the bridge was fully studied from four aspects: environment aesthetics, structure aesthetics, function aesthetics, and form aesthetics. …
Study On Optimal Layout Of Cross ⁃Diaphragm In Oblique Small Box Girder,
2023
China Railway 24th Bureau Group Corporation Limited, Shanghai 200071, China
Study On Optimal Layout Of Cross ⁃Diaphragm In Oblique Small Box Girder, Mai Xinhao
Journal of China & Foreign Highway
In order to determine the optimal layout of the cross⁃diaphragms in the oblique small box girder, a prestressed concrete small box girder bridge with a 50 m span was taken as the research object, and its internal force under the load of the moving beam was numerically simulated and measured. First, the model was modified according to the measured stress data, and the maximum distance between the cross⁃diaphragms was determined by using the warping-limited normal stress. Then, the height and thickness of the middle cross⁃diaphragms were determined according to the deflection difference coefficient of the bridge span. Finally, according to …
Non⁃Gaussian Features Of Fluctuating Wind Pressures Under Combined Axle Condition,
2023
Shandong Railway Investment Holding Group Co., Ltd., Jinan, Shandong 250014, China
Non⁃Gaussian Features Of Fluctuating Wind Pressures Under Combined Axle Condition, Chen Zhiqiang
Journal of China & Foreign Highway
In view of the non-Gaussian characteristics of wind pressure on the train surface of a typical high-speed railway train and bridge system, the Gaussian variable was expressed as a Hermite polynomial considering non-Gaussian variables by using Hermite series expansion method, and the probability density curve and peak factor of train surface were analyzed. The results show that the Davenport peak factor based on Gaussian distribution obviously underestimates the non-Gaussian peak factor, and its probability density curve deviates from the actual curve of the measuring point. The Hermite series peak factor method based on the modified method takes into account the …
Application Of 3d Reconstruction Model In Inspection Of Bridge Apparent Defects,
2023
1. Yunnan Kun-Chu Expressway Investment and Development Co., Ltd., Kunming, Yunnan 650100, China;
Application Of 3d Reconstruction Model In Inspection Of Bridge Apparent Defects, Xu Guangli, Li Shaoyong, Tang Jun, Liu Shuqi, Zhou Yin
Journal of China & Foreign Highway
In view of problems such as low efficiency, poor accuracy, and imprecise three-dimensional (3D) location of defects in apparent defect inspection of bridges, this paper proposed a method for apparent defect inspection of bridges based on a 3D reconstruction model. By taking the indoor rectangular beam as the object, a three-dimensional bridge model was established, and its accuracy was verified. Then, based on the point cloud data derived from the model, a program was written in Python to realize the identification, measurement, and parameter derivation of apparent defects of bridges. Dade Bridge in Kunming, Yunnan Province was set as the …
Design And Construction Of Steel Caisson For Inclined Pilecap Of Beitstadsund Bridge In Norway,
2023
Sichuan Road & Bridge (Group) Co., Ltd., Chengdu, Sichuan 610072, China
Design And Construction Of Steel Caisson For Inclined Pilecap Of Beitstadsund Bridge In Norway, Yang Dingjun
Journal of China & Foreign Highway
At present, the underwater bridge foundation construction technology in China and abroad has been relatively mature, but the different geographical environments, hydrogeological conditions, the form of basic structure, and the available construction equipment lead to different construction schemes and technologies. The Beitstadsund Bridge in Norway is located near the Arctic Circle in central Norway and across the strait. In the design and construction of the deep-water steel cofferdam of the inclined steel pile cap for the bridge, the overall installation of the steel cofferdam was realized by setting the cofferdam support on the inclined steel pipe group, the overall positioning …
Study On Correction Method Of Cable Length Error In Construction Control Of Cable ⁃Stayed Bridges,
2023
School of Civil Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China
Study On Correction Method Of Cable Length Error In Construction Control Of Cable ⁃Stayed Bridges, Huang Gen, Chen Changsong
Journal of China & Foreign Highway
In order to effectively correct the stay cable length error during the construction of the cable-stayed bridge, this paper proposed a correction method with the exposure of the sockets as the error control index and analyzed the influence of the elastic modulus, temperature effect, and anchor point coordinates of the cable on the cable length error from the perspective of construction control. Then, error correction was achieved by adjusting the position of the manufacturing cable length and the nut at the anchor end. The results of application in Jiayu Yangtze River Highway Bridge show that this method can improve the …
