钢管混凝土拱桥施工安全技术的研究-安全技术及工程专业论文.docxVIP

西南交通大学硕士研究生学位论文 第lI页 Abstract As the economy ofour country develops，the need to build plenty of昭fe， economic，and beautiful big span bridges also increases．Throu曲many long years of practices，OUIcountry has accumulated rich experiences on the construction of arch bridge witll concrete and steel tube and,hence． established a set ofrelatively complete techniques in building arch bridge with concrete and steel tube．But as a kind ofbreakthrough to the tTaditional bridge construction technology,the concrete arch bridge of steel tube warrants some systemic research in risk avoidance and safe realization in some specific fields and in the course ofits construction． This paper will use a real engineering example(the bridge over Yellow River at gong-bo gorge)to study and popularize the Mv锄ced techniques used in the construction,to provide solutions to relevant problems encountcred in the construction regarding the impact 011 safe usage,and to propose theoretical research in the safe construction technique of the big span concrete arch bridge of steel tube of large diameter．By the research in the construction technology of the concrete arch bridge of steel tube,the construction technology of this kind of bridge Was made more advanced,much safer and mole reliable．and easier to satisfy design capability． This paper,through the analysis ofthe current construction technology of the concrete arch bridge of steel tube．has a meaningful breakthrough in Suggesting some choices of safe construction techniques in building concrete arch bridge of steel tube in oBr country,and in providing a complete analysis， proof,and validation of the safe construction techniques of the concrete arch bridge ofsteel tube in the actual field． This research will be elaborated in the following three parts：The first part will describe the problem—the history of the safe construction problems in building the concrete arch bridge ofsteel tube．The second part will analyze the problem—through the multi—sided ana