复杂地质条件下超长钻孔灌注桩施工风险分析

复杂地质条件下特大桥梁基础工程中的钻孔灌注桩施工具有典型的高风险性。充分了解风险源，开展风险评估与分析，及时防范和化解工程风险具有重要意义。以富春江特大桥工程建设为研究案例，从承包商的立场出发，分析了复杂地质下特大跨江桥梁工程基础施工中特有的风险，从工程管理的具体操作层面详细探讨了钻孔灌注桩施工中存在的影响工程进度、质量及成本的风险因素，建立了桥梁工程风险的多层次模糊综合评价模型，以期达到有利于施工管理、提高施工效益和促进工程风险管理发展的目的。

Risk analysis of overlength bored piles construction on complicated geological conditions

It has apparently high risk for bored bottling pile construction in super bridge foundation construction. The full understanding of risk source, the implementation of risk assessment and risk analysis, the prompt prevention and elimination of construction risk have vital significance. As for the Fuchun River great Bridge Project, it was analyzed for contractors that the risk in cross-river bridge foundation construction on complicated geological conditions. From the project management, risk factors were particularly discussed for project cost, progress and quality in over-length bore bottling pile construction. In order to profit construction management, promote project benefit and accelerate the development of risk management, a multilayer fuzzy synthesis evaluation model has been established for the bridge project risk.