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 …
Analysis Of Mechanical And Deformation Characteristics Of Karst Tunnel Structure And Research On Treatment Technology,
2023
1. Guangxi Beitou Traffic Maintenance Technology Group Co., Ltd., Nanning, Guangxi 530029, China;
Analysis Of Mechanical And Deformation Characteristics Of Karst Tunnel Structure And Research On Treatment Technology, Huang Haifeng, Chang Zhenchao, Luo Junhui, Zhou Xiang, Ceng Fuquan, Tian Fapai
Journal of China & Foreign Highway
Combined with the construction process of Nongmo Karst Tunnel on Du’an–Bama Expressway, this paper used Midas-GTS finite element calculation software to conduct numerical simulation research on the stability of surrounding rock and treatment structure of tunnel with karst caves on either side, analyzed the influence of tunnel excavation on the stress and deformation characteristics of surrounding rock and supporting structure, and probed into the treatment effect of biased wall and root pile on the treatment of karst tunnel. The results show that the surrounding rock at the bottom of the tunnel, the top of the composite foundation, and the top …
Effect Of Temperature And Light On Characteristics Of Asphalt Emissions,
2023
1. Experimental Teaching Center of Transportation Engineering, Tongji University, Shanghai 200092, China;
Effect Of Temperature And Light On Characteristics Of Asphalt Emissions, Zhu Xuwei, Tian Bo
Journal of China & Foreign Highway
In order to study the effects of temperature and light on the characteristics of asphalt emissions, atmospheric pressure chemical ionization–time-of-flight mass spectrometer (APCI‑TOF MS) and electron impact ionization mass spectrometry (EI‑MS) were used to quantitatively characterize the composition information of PG 62-22 asphalt emissions at different temperatures (40–200 °C). The effects of different temperatures and light on total emission factor, SOA conversion factor, intermediate volatile organic compound (IVOC)/semi-volatile organic compound (SVOC) volume fraction, and aromatics volume fraction of asphalt emissions were studied. The results show that the components of asphalt emissions change with temperature, and the components are complex and …
Study On Triaxial Mechanical Properties Of Glass Fiber Reinforced Cement Soil In Short Age,
2023
School of Civil Engineering, Shaoxing University, Shaoxing, Zhejiang 312000, China
Study On Triaxial Mechanical Properties Of Glass Fiber Reinforced Cement Soil In Short Age, Wang Wei, Dai Mengdan, Yu Wenjie
Journal of China & Foreign Highway
In order to evaluate the improvement effect of fiber on the brittle damage of cement soil, a triaxial unconsolidated undrained (UU) test was carried out on glass fiber cement soil (GCS) with a curing age of 7 d and a mass fraction of glass fiber (GF) of 0, 2‰, 4‰, 6‰, and 8‰, respectively. The results show that: ① GCS retains the original strain softening characteristics of cement soil; ② For the same mass fraction of GF, the peak stress, peak strain, and residual strength of GCS samples increase gradually with the increase in confining pressure, but the brittleness index …
Study On Experimental Application Of Xinjiang Steel Slag In Cement Stabilized Base,
2023
1. Xinjiang Communications Construction Group Co., Ltd., Urumqi, Xinjiang 830016, China; 2. Xinjiang Jiaojian Highway Planning Survey and Design Co., Ltd., Urumqi, Xinjiang 830016, China;
Study On Experimental Application Of Xinjiang Steel Slag In Cement Stabilized Base, Chen Wei, Yu Haiming, Li Qian, Huang Yong, Si Yi
Journal of China & Foreign Highway
Based on the experimental study of Xinjiang steel slag in cement-stabilized base, the physical and chemical characteristics of steel slag were analyzed, and the unconfined compressive strength, splitting strength, and dry shrinkage performance of cement-stabilized steel slag and gravel mixture with different cement dosages (4% and 5%) and steel slag contents (30%, 40%, and 60%) were analyzed. The test results show that steel slag can be used as a good engineering aggregate in a cement-stabilized base, and with the addition of steel slag, the unconfined compressive strength and splitting strength of steel slag and gravel mixture are increased to varying …
Mechanical Properties And Micro Analysis Of Cement Stabilized Steel Slag Macadam Base,
2023
Hebei Qiancao Expressway Development Co., Ltd, Tangshan, Hebei 063200, China
Mechanical Properties And Micro Analysis Of Cement Stabilized Steel Slag Macadam Base, Wan Tianbao
Journal of China & Foreign Highway
With steel slag as coarse aggregate, cement-stabilized steel slag macadam base material was designed and prepared by selecting three kinds of cement dosage and three kinds of steel slag content. The mechanical properties of cement-stabilized steel slag macadam base were studied through compaction and unconfined compressive strength tests, and XRD and SEM microscopic tests were carried out to analyze the mineral composition and microscopic morphology of steel slag and mixture and clarify the internal mechanism of hydration product formation and microstructure and strength formation. The results show that the maximum dry density and optimum moisture content of cement-stabilized steel slag …
Analysis Of Influence Of Moisture Content ⁃Temperature Dual Factor On Mechanical Properties Of Red Clay,
2023
1. The First Engineering Co., Ltd., China Communications Fourth Highway Engineering Bureau, Beijing 10002, China;
Analysis Of Influence Of Moisture Content ⁃Temperature Dual Factor On Mechanical Properties Of Red Clay, Wang Jiangtao, Bao Temenbaiyila, Yang Weiguang, Zhou Qi, Fu Helin
Journal of China & Foreign Highway
Under the new climatic environment and engineering construction requirements, engineering problems involving red clay are becoming more and more prominent, and it is urgent to deeply grasp the mechanical and engineering properties of residual slope red clay. The typical red clay in Hunan Province was studied in this paper. Based on the unconsolidated undrained direct shear test, this paper studied the mechanical properties of residual slope red clay under the influence of moisture content and temperature, focusing on the most unfavorable conditions affecting the mechanical properties of red clay. The results show that: ① The shear strength of red clay …
