This paper presents the design, manufacture and assembly of formwork without pulling bar for Qujiatun extra large bridge. This type of formwork enhanced the good appearance of concrete members.
Based on the problems of measurement control encountered during the erection of continuous box girder for Jintang Bridge,this paper details the linear control and level control techniques and the optimization of surveying points layout for continuous box girder erection.
Based on the construction experience of tunnel DK651+972 along Harbin-Dalian special railway for passenger transportation, this paper presents determination of dewatering options according to hydrological and geological conditions. Old parameters were modified to achieve dewatering target and assure the project smooth progress.
Before construction of prestress engineering in certain grand bridge project,the full degree and density degree for duct grouting are studied through test of two grouting technologies,based on the making up of the high performance duct grouting.The studies point out that the key technique is the match technique of high performance cement paste.
The prestressing duct was also a technical measure for duct grouting by vacuum method.This paper present frictional resistance test method along prestressing duct of the jintang Bridge.By anglicizing the data,the actual frictional resistance was obtained and compared with design and construction standard.Based on the principle of duct friction development,the key construction technical point of duct was summarized.
Taking the BOT project of Chongquin Fuling Lidu Bridge as example,this paper discusses key links needing attention during BOT investment choice,contract signing and construction management.Some important points are summarized in this paper for successful executing BOT project.This paper can be referenced by investors in related building industries.
Based on the experience of Gongzhuling prefabricating yard for Harbin-Dalian railway for passenger transportation, this paper analyzes characteristics of concrete box beams, presents the construction techniques and key control points for simply supported box beams.
This paper introduces the application of explosive displacement method in riprap foundation bed of gravity quay in recent years.combining the situation of foundationg bed,ground and hydrological condition of fujian one gravity wharf,this paper presents a summarization of the design,construction technology,quality control and safety control of underwater explosive compaction for wharf bed,which may serve as a reference for similar projects.
Based on the construction practice of non-navigable span of Jintang Bridge,this paper presents the calculation principle and formula of theoretical elongation of prestressing cable,and the prestressing stress loss assessment.It presents the example showing the calculation process of theoretical elongation of prestressing cable.The example can be referenced for future similar construction and calculation.
This paper presents the construction technique of Class AB filling material for the base of Harbin-Dalian Passenger Transportation Railway.
This paper presents the construction techniques for the base cushion layer for Harbin-Dalian Passenger Transportation Railway.
It used shake-table experiment to simulate the FPS-system, and to research the performances of the isolated-structure with the different earthquakes, and it can be used to Harbor structure in the future. Through determination, we research the state response of the FPS-system with earthquakes which have different acceleration peaks, and contrast the results with un-isolated-structure. As the result of the FPS isolated-system experiments, the accelerations of the frame is about to the un-isolated-system under the 0.2g earthquake waves, so the efficiency of FPS is not very notable; but when FPS system under the large accelerations 0.6g and 1.2g, the FPS system's accelerations is much smaller than the un-isolated system, so the efficiency is relative notable.
This paper presents the bundling method for multi pipelines on sea bed for the oil jetty of Angola National Petroleum Company.
Though the application of geological sketching in Wuchiba Tunnel,this paper discusses the importance of geological sketching to tunnel construction and the realization of long distance geological prediction using geological sketching method.
This project is a butterfly type steel pipe arch bridge.Multi-functional member assembled gantry crane,along with construction trestle and support,is used to install and construct steel box beam and arch ribs.
This paper mainly presents a complete,scientific,strict and operational emergent rescue system for Wuchiba extra long tunnel(exit) of Hubei Hurong expressway.The precaution awareness,accident avoiding ability,self rescue ability and mutual rescue ability are continually enhanced.The smooth construction progress is guaranteed.People life and property,good economical and social benefit is obtained.
This paper analyzes the practice and results of building Four Virtues Leadership organized by party committee of Fourth Harbor Engineering Co.Ltd.It elaborates on the importance,hardness and chronicity of Four Virtues Leadership viewed by the party committee of Fourth Harbor Engineering Co.Ltd.It presents the key to success of three important links of promote leadership,seek development and build harmony organized by the party committee of the Fourth Harbor Engineering Co.Ltd.in building four virtues leadership.It summarizes the experiences of Four Virtues Leadership building of Fourth Harbor Engineering Co.Ltd.The experiences can be referenced by other state owned construction enterprises.
Based on the construction experience of Zhoushan Jintang Bridge,this paper presents the construction techniques and construction flow of a system that converts the simply supported prefabricated 60m box beam into continuous structure.It points out specially the key construction points and quality control methods of main construction steps.
Following the social development,more and more steel pipe concrete are used in civil project.In additional to bonding force between concrete and steel,there is strong restrain to concrete by steel pipe.The three dimensional restrain improve greatly the performance of concert inside pipe.It can give a full play of the advantages of steel and concrete simultaneously,and limit disadvantages of steel pipe structure,such as local yield and deformation.
