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Research on the depth effect of caisson foundation south anchorage of Taizhou Bridge
Pan Hui,Shao Guojian and Hu Feng
Strategic Study of CAE 2012, Volume 14, Issue 5, Pages 62-65
The foundation of the gravity anchorage is usually simplified as shallowBecause the embedded depth of caisson foundation south anchorage of Taizhou Bridge is 42 m, FEM(finiteIt is clear that the depth effect improves the bearing capacity of anchorage foundation dramaticallyby comparing the variation of the displacement and the rotation angle of the anchorage foundation in
Keywords: gravity anchorage caisson foundation depth effect FEM
The new design method of the reinforcing bars in the prestressed anchorage plates
Zhang Xiangqun,Lin Bo,Liu Zhao
Strategic Study of CAE 2010, Volume 12, Issue 4, Pages 82-85
The tooth plate anchorage zones of the prestressed concrete girder bridgebear the anchorage forces and radial forces of prestressed bars and are easy to form cracks or breakstrut-and-tie bar theory is constructed to form a novel design method for the prestressed bar design in the anchorage
Keywords: tooth plate anchorage zone D region (discontinuity or disturbance region) strut-and-tie model
North anchorage project construction key technology in the Fourth Nanjing Yangtze River Bridge
Wang Chengjiang,Niu Yazhou,Tian Xin,Jing Gangyi
Strategic Study of CAE 2013, Volume 15, Issue 8, Pages 31-36
North anchorage of the Fourth Nanjing Yangtze River Bridge is a kindThermal stress and temperature control is the key technique in large mass concrete construction of this anchoragetemperature control method,anchor system fixing technology and high-accuracy survey technology of North anchorage
Keywords: anchorage large-mass-concrete temperature control anchor system
The design of the south anchorage diaphragm wall for the Fourth Nanjing Yangtze River Bridge
Dong Meng,Jia Lifeng,Li Dan
Strategic Study of CAE 2013, Volume 15, Issue 8, Pages 26-30
Keywords: anchorage diaphragm wall “∞”shape the Fourth Nanjing Yangtze River Bridge
Overview of a new anchorage system design concept of cable-stayed bridge
Cui Bing,Dong Meng,Jia Lifeng,Song Yingtong
Strategic Study of CAE 2013, Volume 15, Issue 8, Pages 12-17
Superior to conventional pre-stressed anchorage system, a new anchoragesystem design concept of cable-stayed bridge, the stress distributed transmitting anchorage system,adopted to the Fourth Nanjing Yangtze River Bridge referencing to the design of conventional steel framed anchorageThe conventional steel framed system relies on the back anchorage beam, which provides rigid bearingHowever, the stress distributed transmitting anchorage system is arranged with several rows of reinforced
Keywords: main cable anchorage system stress distributed transforming the Fourth Nanjing Yangtze River Bridge
Security monitoring technology of the caisson foundation of anchorage in construction
Feng Zhaoxiang,Wang Jinguo,Wang Jian
Strategic Study of CAE 2010, Volume 12, Issue 4, Pages 68-72
Aiming at the structure features and construction methods for the south anchor caisson foundation of Taizhou Yangtze Highway Bridge, this paper presents a design scheme of security monitoring in construction. The result from monitoring data in construction shows that the horizontal tension stress which near blade foot at the bottom of well are greater in initial well sinking. It will effectively guide the well construction with the physical quantity as the control index of well sinking. Sidewall earth pressure increases first, and then decreases with the increase of embedment depth.
Keywords: caisson control index well sinking sidewall earth pressure
Construction technology in huge caisson on the ground
Qiu Qionghai,Lin Fan,Jiang Jianghua
Strategic Study of CAE 2010, Volume 12, Issue 4, Pages 14-20
Taizhou Changjiang River Highway Bridge is a suspension bridge with three towers, two spans and two anchorages. The main span is 2×1 080 m. The south and north foundation of the anchorages are deep water caisson with rectangular plane size 67.9 m×52.0 m. A great many of technical innovations are adopted to solve many technical problems including the disposal of the compound basement, manufacturing and installation of the caisson, fulfillment of concrete in the caisson etc, based on the conditions such as the thick overburden layer at the top of the caisson, the super dimension and the big sinking depth of the caisson. This article gives a brief introduction on construction technologies in huge caisson on the ground and can be taken as a reference during the construction of the super scale caisson on the ground in the future.
Keywords: suspension bridge anchorage caisson assembly deep-well dewatering foundation settlement air suction
Gang SHI, Yongjiu SHI, Yuanqing WANG, Yongzhi ZUO, Xiaohao SHI, Zaoyang GUO,
Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3, Pages 383-395 doi: 10.1007/s11709-010-0074-6
Keywords: single-layer plane cable net supported glass curtain wall damage cable prestress loss cable anchorage
Liu Zhao,Meng Shaoping,Lü Zhitao
Strategic Study of CAE 2003, Volume 5, Issue 12, Pages 48-54
Two model tests for pylon´s anchorage zone of two long-span cable-stayed bridges, the SecondThe optimal configuration of prestress tendons in anchorage zone, and the emulation effects of segment
Keywords: cable-stayed bridge pylon model test design research
Study on Strengthening Technique with Prestressed PBO Fiber Sheets
Wu Zhishen,Iwashita Kentaro,Niu Hedong
Strategic Study of CAE 2005, Volume 7, Issue 9, Pages 18-24
The application of externally bonded fiber reinforced polymer (FRP) laminates to the exposed faces of concrete members provides an innovative and efficient rehabilitation method for strengthening and upgrading structurally inadequate or functionally obsolete concrete structures. However, FRP laminates unlike the cold worked steel exhibit elastic-rupture behavior and also the limited bond capacity of FRP-concrete interface often fails the retrofitted system in an undesirable brittle manner, which leaves FRP material unused with more reserves. Moreover, enhancements in cracking and yield load due to FRP bonding are not significant. To take full advantage of FRP laminates, more gains can be achieved by prestressing the fibers prior to bonding them. Traditional practice is to pretension fiber sheets impregnated with adhesive or FRP plate, which is time-consuming, difficult to apply in the field and ensure a perfect bond at the interface. A newly-developed PBO fiber possesses high modulus, high strength and higher energy absorption capability as compared to carbon and aramid fibers, and PBO fiber sheet can be pretensioned to over 70% of its tensile strength without being impregnated with adhesive. All these make such material suitable to be prestressed for strengthening concrete structures. Based on the experiments and theoretical studies, a comprehensive strengthening method with prestressed PBO sheet is established including concept, working principle and corresponding countermeasures, whose strengthening effect is validated by both laboratory and field experiments.
Keywords: fiber reinforced polymers (FRP) PBO fiber sheet retrofit/repair bond prestressing anchorage
Title Author Date Type Operation
Research on the depth effect of caisson foundation south anchorage of Taizhou Bridge
Pan Hui,Shao Guojian and Hu Feng
Journal Article
The new design method of the reinforcing bars in the prestressed anchorage plates
Zhang Xiangqun,Lin Bo,Liu Zhao
Journal Article
North anchorage project construction key technology in the Fourth Nanjing Yangtze River Bridge
Wang Chengjiang,Niu Yazhou,Tian Xin,Jing Gangyi
Journal Article
The design of the south anchorage diaphragm wall for the Fourth Nanjing Yangtze River Bridge
Dong Meng,Jia Lifeng,Li Dan
Journal Article
Overview of a new anchorage system design concept of cable-stayed bridge
Cui Bing,Dong Meng,Jia Lifeng,Song Yingtong
Journal Article
Security monitoring technology of the caisson foundation of anchorage in construction
Feng Zhaoxiang,Wang Jinguo,Wang Jian
Journal Article
Construction technology in huge caisson on the ground
Qiu Qionghai,Lin Fan,Jiang Jianghua
Journal Article
Influence of damages on static behavior of single-layer cable net supported glass curtain wall: full-scale model test
Gang SHI, Yongjiu SHI, Yuanqing WANG, Yongzhi ZUO, Xiaohao SHI, Zaoyang GUO,
Journal Article
Model Tests and Comparative Study of the Pylon's Anchorage Zone of Two Long-span Cablae-stayed Bridges
Liu Zhao,Meng Shaoping,Lü Zhitao
Journal Article