老码头混凝土方桩修复加固方案及技术要点

老高桩码头桩基多采用混凝土方桩,经长期运营后,桩基普遍存在不同程度的破损缺陷,严重威胁结构的安全性和耐久性,影响码头的正常使用,亟需对破损桩基进行修复加固。目前,混凝土方桩修复加固通常采取粘贴碳纤维布、加大桩帽、局部外包、钢抱箍、玻纤套筒等措施,均取得良好的工程效果。探讨各措施的实施方案、特点、要点以及适用工况等,以便为合理选用提供参考。应用结果表明:针对老高桩码头混凝土方桩的破损缺陷,根据不同破损特征和施工条件合理选择修复加固方案,可满足安全可靠且经济合理的维护要求。

Repair and reinforcement measures and technical points of concrete square pile for old wharf

Concrete square piles are mostly used in the pile foundation of the old high pile wharf.After long-term operation,the pile foundation generally has different degrees of damage defects,which seriously threaten the safety and durability of the structure and affect the normal use of the wharf.It is urgent to repair and reinforce the damaged pile foundation.At present,the repair and reinforcement of concrete square pile usually adopts such measures as pasting carbon fiber cloth,increasing pile cap,local outsourcing,steel hoop,glass fiber sleeve,etc.,which have achieved good engineering results.This paper discusses the specific implementation scheme,characteristics,key points and applicable conditions of each measure to provide reference for reasonable selection.The application results show that in view of the damage defects of prestressed concrete square piles of the old high pile wharf,according to different damage characteristics and construction conditions,the reasonable selection of repair and reinforcement measures can meet the safe,reliable,economic and reasonable maintenance requirements.