斜拉桥索塔转体施工期间风险评估和风险管理

摘要:

转体施工法作为一种桥梁施工方法，由于其特有的施工优越性，使得其被广泛应用于斜拉桥索塔的施工之中。然而，由于斜拉桥索塔施工工序繁多和施工工艺复杂，加之需保证转体过程顺滑、稳定及精度要求。故为了降低施工期间风险，对斜拉桥索塔转体施工期进行结构安全风险评估是十分有必要的。本文依托某斜拉桥索塔转体施工为背景，基于ALARP准则桥梁风险矩阵方法，识别施工期间风险源，进行风险分析，为充分了解施工风险，制定相应的防范措施来控制和降低风险水平，以确保斜拉桥施工期安全。

Abstract:

As a bridge construction method, swivel construction method is widely used in the construction of cable-stayed bridge pylon due to its unique construction advantages. However, owing to the various construction procedures and complex construction technology of cable-stayed bridge pylon, in addition to the smooth, stable and precision requirements of the swivel process. In order to reduce the risk during the construction period, it is very necessary to carry out structural safety risk assessment for the cable-stayed bridge tower during the swivel construction period. In this paper, based on the background of a cable-stayed bridge pylon swivel construction, according to method of bridge risk matrix decision rely on ALARP, identify the risk source during construction, carry out risk analysis, in order to fully comprehend the construction risk, formulate corresponding preventive measures to control and reduce the risk level, so as to ensure the safety of cable-stayed bridge construction period.