Key Laboratory of Large span Bridge Construction Technology

Wuhan, China

Key Laboratory of Large span Bridge Construction Technology

Wuhan, China

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Zhang Y.T.,China Communications Construction Company Ltd. | Zhang Y.T.,Key Laboratory of Large span Bridge Construction Technology | Li X.,China Communications Construction Company Ltd. | Li X.,Key Laboratory of Large span Bridge Construction Technology | And 2 more authors.
Applied Mechanics and Materials | Year: 2014

Jiu-Jiang Yangtze River Highway Bridge, with a main span of 818m, is another long span hybrid girder cable-stayed bridge which connects Jiang Xi province and Hu Bei province in China. Steel box girder is adopted in main span and north side span, and main girder of south side span and south tower nearby is designed of concrete box girder. The pylon is concrete structure, with the height of 242.3m and H-shape. There are 216 cables used in this bridge, of which are assembled by parallel strands. Jiu-Jiang Yangtze River Highway Bridge began to construct in 2009, and was closed in December, 2012. The bridge opened to traffic officially in the next year. Design concept, construction method and vibration control measures about Jiu-Jiang Yangtze River Highway Bridge are introduced in this article. © (2014) Trans Tech Publications, Switzerland.


Liu Z.,China Communications Construction Company Ltd. | Liu Z.,Key Laboratory of Large Span Bridge Construction Technology | Tian W.,China Communications Construction Company Ltd. | Tian W.,Key Laboratory of Large Span Bridge Construction Technology | And 6 more authors.
Modern Tunnelling Technology | Year: 2015

To select a suitable material for the friction surface of an incremental launching slippage system of a prefabricated segment of a immersed tunnel, the static and dynamic friction coefficients of four material groups, i.e., stainless steel plate-PTFE, stainless steel plate-NGE, ordinary steel plate-PTFE and ordinary steel plate-NGE, were tested. A 20000 kN load-shearing test machine was used for the test utilizing the double-shear method. The test results indicate that: the friction coefficient of the combined stainless steel plate and PTFE plate is the smallest, and that of the combined ordinary steel plate and PTFE plate is the largest; and lithium-based lubricant and water have visible effects on reducing the static and dynamic friction between the stainless steel plate and PTFE plate, while the effect of lithium-based lubricant on friction reduction declines with the attenuation of the lubricant layer due to squeezing. The test results provide a significant reference for selecting material for the friction surface of incremental launching slippage systems, as well as for disposal measures for lubrication. ©, 2015, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Hehui Z.,Key Laboratory of Large span Bridge Construction Technology | Xingfa W.,Key Laboratory of Large span Bridge Construction Technology | Min W.,Key Laboratory of Large span Bridge Construction Technology | Yongtao Z.,China Communications Construction Company Ltd.
IABSE Conference, Geneva 2015: Structural Engineering: Providing Solutions to Global Challenges - Report | Year: 2015

Precast segmental bridge with corrugated steel webs has good popularization value, for the advantages of precast segmental construction and box girder with corrugated steel webs. In order to study the mechanical behavior of this structure, 6 simply-supported scale model beams with corrugated steel webs were tested with the forming process, ratio of internal tendons to external tendons, shear-span ratio, number of joint, connection type of corrugated steel web,etc.,as the parameters. Stress variations in the concrete, web and tendon and deflection during loading are described, the crack generation and failure mode are also explained, the effects of parameters on the mechanical behavior of beams are analyzed. The study indicates that segmental beams have equal stiffness with monolithic beam in elastic stage, the joint affects the failure mode and causes decrease in the flexural bearing capacity, segmental beams with mixed post-tensioning or flange connector show better mechanical behavior than other segmental beams.


He M.,Changjiang Waterway Survey Center | Yang B.,Changjiang Waterway Survey Center | Huang S.,Wuhan University | You X.,China Communications Construction Company Ltd. | And 3 more authors.
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2011

Dynamic characteristics are crucial parameters of structures, which could reflect the deviation of structures directly. This paper develops a software suite for structural dynamic characteristics analysis of bridges under construction, validates its correctness and reliability using dynamic monitoring data, interprets the physical property of dynamic characteristics and reaches significant conclusions for understanding large unknown structures.


Liu Y.,Key Laboratory of Large span Bridge Construction Technology | Ji F.-Q.,Key Laboratory of Large span Bridge Construction Technology | Chen P.-S.,Key Laboratory of Large span Bridge Construction Technology
Applied Mechanics and Materials | Year: 2014

This paper introduces a three-dimensional numerical model of simulating the tunneling cycle of tunnel-type anchorage by the large finite element software ABAQUS. With tunneling cycles, the space-time effect for footage is analyzed comparatively, which are between the tunnel in headings and tunnel in foots. There are three parameters for evaluating the construction methods, that contain vertical displacement of tunnel vault, vertical displacement of tunnel invert, and horizontal displacement of tunnel wall. The results show that all the values of the above parameters are in the control. Hence, the construction methods of the engineering are available. © (2014) Trans Tech Publications, Switzerland.


Yang Z.,Key Laboratory of Large span Bridge Construction Technology | Yang Y.,Key Laboratory of Large span Bridge Construction Technology
Applied Mechanics and Materials | Year: 2013

The originating base of large shield is a fundamental guarantee of shield machine prosperous assembly and originating posture. This paper based on Nanjing Weisan Road Tunnel Across Yangtze River, the requirements of large TBM assembly and the guarantee measures on originating posture is introduced. © (2013) Trans Tech Publications, Switzerland.


Huang Y.,Key Laboratory of Large span Bridge Construction Technology | Zheng H.,Key Laboratory of Large span Bridge Construction Technology | Wang M.,Key Laboratory of Large span Bridge Construction Technology | Wu X.,Key Laboratory of Large span Bridge Construction Technology
Applied Mechanics and Materials | Year: 2013

The short line match-cast method of precast segments has proved to be the most versatile and reliable way to concrete bridge construction. The success of match-cast method relies heavily on accurate geometry control in precasting as the scale of adjustments during erection is very small and difficult to implement. So the required levels of accuracy in segments match-casting are stringent in order to assure erection accuracy. Therefore, the research on segments match-casting and geometry control technique of space distorted segments are very important. Based on the principle of match-casting using the short-line method, the geometry control technology of transition curve section in cross-sea bridge erected by precasting segment girder is proposed. As an example of south approach spans in north branch of Xia-zhang Cross-sea Bridge, this paper will provide a reference for the construction of similar bridges. © (2013) Trans Tech Publications, Switzerland.


Yang Y.,Key Laboratory of Large span Bridge Construction Technology | Ji F.,Key Laboratory of Large span Bridge Construction Technology | Yang Z.,Key Laboratory of Large span Bridge Construction Technology
Applied Mechanics and Materials | Year: 2013

The surface-layers have very high water content and low bearing capacity, so far to be the very soft clay foundation, which come from the reclaimed land in project of reclamation. It is difficult to improve the very soft clay foundation by traditional vacuum preloading. A new method named surface soft soil improvement is presented in this paper, which can make the soft clay foundation to be improved in preliminary. Once forming the hard coat layer, the foundation may reach the needs of further construction. In the construction technology, the horizontal filter pipe net is used to instead of the sand bedding course. By laying of woven cloth and non-woven geotextile over the surface of reclaimed silt, installing PVDs by manpower becomes possible. Besides, the vertical PVDs all are connected with the horizontal filter pipe net directly, that makes a whole spatial drainage system. The loss of the degree of vacuum is decreased, and the improvement is increased. Thus, this construction technology is as a reference to the large scale engineering construction and similar projects. © (2013) Trans Tech Publications, Switzerland.


Yang Y.H.,Key Laboratory of Large span Bridge Construction Technology | Wu S.B.,Key Laboratory of Large span Bridge Construction Technology | Niu Z.,Key Laboratory of Large span Bridge Construction Technology
Advanced Materials Research | Year: 2013

Caisson is a commonly used foundation in modern bridge engineering. When the caisson is sinking towards the seabed, it will suffer from the coupled effects of wind, current and its mooring system, under which an intense horizontal oscillation might occur. The mechanism of this kind of oscillation can be concluded as Vortex Induced Motions (VIM) of a large floating object in resilience mooring system. In this paper, through numerical simulation of the viscous flow field around a certain caisson, the mechanism of vortex shedding under different current velocity is discussed. © (2013) Trans Tech Publications, Switzerland.


Dai Y.,China Communications Construction Company Ltd. | Du S.,China Communications Construction Company Ltd. | Du S.,Key Laboratory of Large span Bridge Construction Technology | Zheng H.,Key Laboratory of Large span Bridge Construction Technology | Wang M.,Key Laboratory of Large span Bridge Construction Technology
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2016

In order to study the torsional behavior of precast segmental box girders bridge with corrugated steel webs under eccentric loading, four 1:10 scaled models of segmental beam are manufactured for the first time, and eight full-scale FEA model are built considering the joint between segments. Deflection and stress variations in the segmental box girder under elastic stage are investigated. The influence of key parameters to torsional behavior, such as, forming processes, number of joints, layout of diaphragm, web shape, is analyzed. The results show that the torsional enlargement effect of deflection can improve more than 10%~15% in segmental beam, compared to monolithic beam. The torsional enlargement effect of shear stress, which can be increased by 1.5 times due to the eccentric load, must be taken seriously consideration for segmental beam. The forming processes and layout of diaphragm have significant influence to torsional enlargement effect, while the numbers of joints and web shape have little influence to it. Finally, based on the energy method, a practical calculation method considering the joint, for the torsional stiffness of this bridge is proposed, and some design suggestions are given. © 2016, Editorial Department of Journal of Wuhan University of Technology. All right reserved.

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