摘要
本設計介紹了拱橋的歷史、現狀以及今后的發展趨勢，簡要給出了大跨拱橋的施工方法，以科學的方法并結合一些成功的工程實例，詳細介紹了纜索吊結合支架完成拱肋安裝的施工方法，并重點描述了這種方法施工過程中的難點和要點。
設計主要分為6章，第1章為緒論，概括地介紹了大跨度拱橋的發展狀況、結構特點和施工方法；第2章確定了跨度為137m的鋼管混凝土拱橋的施工方案；第3章內容是纜索吊裝系統設計計算，是本設計的重點內容；第4、5章分別介紹錨碇系統設計和塔架系統設計，是對纜索吊裝系統附屬結構的設計，也很重要；第6章是詳細施工工藝的闡述，也是本設計的又一重點內容，也是現實施工過程中應該主要控制的部分。
關鍵詞：大跨度拱橋 纜索吊裝系統 支架
Abstract
The design presented the history ,current situation and future trends of the arch , gives a brief span arch bridge construction methods, combined with the scientific method and examples of successful projects, details of the cable crane installation combined with support to complete rib construction methods, and focus on the method described in the difficult construction process and the key points.
Design is divided into six chapters, chapter 1 is introduction, overview of the development of long-span arch bridge, structural features and construction methods; Chapter 2 identified the span of 137m of steel arch bridge construction program; Chapter 3 is the cable crane system design and calculation, the key elements of this design; Chapter 4and5 introduced respectively tower anchorage system design and system design, is a subsidiary structure of cable crane system design, is also important; in Chapter 6 is a detailed description of the construction process is another key point of this design ,is the process of actual construction should be the main control part.
Keywords: long span arch bridge cable crane system support system
