基于系统动力学对大跨径斜拉桥深水基础施工安全风险的辨识研究

Identification of Safety Risk in Deep Water Foundation Construction of Long-span Cable-stayed Bridge Based on System Dynamics

随着社会的进步和我国改革开放的发展,近几十年来国家投入巨额资金来加快交通设施的建设,因此我国公路及城市交通基础设施得以迅速发展[1]。截止2017年底,我国已有80.53多万座公路桥梁,总长度已超4916.97万延m,我国已成为世界第一桥梁大国[2]。跨越能力大、结构新颖、高效的斜拉桥更是得到了前所未有的发展,因此对于大跨径斜拉桥施工安全风险的辨识、评估和控制显得尤为重要。本文基于系统动力学原理对大跨径斜拉桥深水基础施工进行了安全风险辨识研究,以期为工程应用提供参考。

With the progress of society and the development of China's reform and opening up,in recent decades,the state has invested a huge amount of money to speed up the construction of transportation facilities,so China's highway and urban transportation infrastructure have been developed rapidly[1].By the end of 2017,China had over 805300 highway bridges,with a total length of more than 49.1697 million linear meters.China has become the world's largest bridge country[2].The cable-stayed bridge with large span capacity,novel structure and high efficiency has been developed unprecedentedly,so it is very important to identify,evaluate and control the construction safety risk of long-span cable-stayed bridge.Based on the principle of system dynamics,this paper studies the safety risk identification of deep-water foundation construction of long-span cable-stayed bridge,in order to provide reference for engineering application.