桥梁桩基冲刷固化土防护施工技术及措施

Construction Techniques and Measures for Protection of Scour Solidified Soil on Bridge Pile Foundation

摘要:

依托东海大桥桥墩桩基固化土防护典型施工试验工程，详细开展了海域桥梁桩基泥浆固化土冲刷防护施工工艺研究。首先借鉴了海上风电单桩基础固化土防冲刷施工工艺，有针对性地分析了海域桥梁群桩基础固化土冲刷防护工艺施工难点；然后开展了海上泥浆固化土现场制备工艺的研究，并充分考虑海洋潮汐等环境因素的影响，阐述了固化土浆液的制备要点和泵送施工关键技术，并对其防护效果进行检验。结果显示：泥浆固化土在海域桥梁桩基冲刷防护工程中具有良好的抗冲刷能力，其水下施工流失率可控，适应性较好，可为后续泥浆固化土技术在海域桥梁桩基冲刷防护工程中的推广应用提供借鉴参考。

Abstract:

Based on the typical construction test project of solidified soil protection of pier pile foundation of Donghai Bridge, the construction technology of slurry solidified soil scouring protection of bridge pile foundation in sea area is studied in detail. Firstly, based on the anti-scouring construction technology of solidified soil for offshore wind power single-pile foundation, the construction difficulties of solidified soil scouring protection technology for bridge pile group foundation in sea area are specifically analyzed. Then, the on-site preparation process of marine slurry solidified soil is studied, and the influence of environmental factors such as ocean tide is fully considered. The preparation essentials of solidified soil slurry and the key technology of pumping construction are expounded, and its protective effect is tested. The results show that the slurry solidified soil has the good anti-scouring ability in the scouring protection project of bridge pile foundation in sea area, and its underwater construction loss rate is controllable and has good adaptability, which provides a reference for the popularization and application of slurry solidified soil technology in the scouring protection project of bridge pile foundation in sea area in the future.