超短劲性复合桩基在光伏发电项目中的应用  

Application of Ultra-Short Stiffened Composite Pile Foundation in Photovoltaic Power Generation Project

作　　者：武江 李建 WU Jiang;LI Jian(China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 510663,China;Shanghai Geoharbour Construction Group Co.,Ltd.,Shanghai 200072,China)

机构地区：[1]中国能源建设集团广东省电力设计研究院有限公司,广州510663 [2]上海港湾基础建设(集团)股份有限公司,上海200072

出　　处：《内蒙古电力技术》2023年第4期26-31,共6页Inner Mongolia Electric Power

摘　　要：沿海滩涂或鱼塘中建设的渔光互补光伏发电项目采用预应力管桩作为光伏支架基础,由于地质条件差,多数为深厚淤泥地基,单桩承载力极低,需要大幅增加桩长才可满足单桩承载力要求。为此,提出一种超短劲性复合桩基方案,即预应力管桩+超短水泥土搅拌桩,设计六组不同桩径、桩长的复合桩基,对其进行理论计算分析,并通过现场桩基试验检验该方案的可行性。之后在广东沿海某大型滩涂光伏项目中,大规模采用了超短劲性复合桩基进行验证。现场试验与工程桩检测结果表明,该方案在单桩抗压与抗拔承载力方面均有大幅提升,且工程造价可降低5%以上;在施工中通过改装水泥土搅拌桩机械钻杆和行走系统,可有效提高施工效率,便于施工,满足工程进度需要。The prestressed concrete piles are usually used as the PV panel support foundation in most of the PV power stations built in the coastal beach or in the reservoir fishpond.However,the geological condition of these projects are usually poor with deep silt soil and very low bearing capacity of a single pile,so the pile length needs to be designed rather long in order to meet the requirements of the superstructure load.In this paper,it is proposed that an ultra-short stiffened composite pile,namely prestressed pipe pile with ultra-short cement-soil mixing pile.The author designs six kinds of composite piles with different diameters and lengths,and carries out the theoretical calculation and field pile tests in order to verify the calculation results.Then,the ultra-short stffened composite pile is used on a large scale in a large beach PV power station in Guangdong Province to confirm the feasibility.The results of field test and pile inspection show that the ultra-short stffened composite pile can significantly improve the compression and uplift bearing capacity of the pile,and the pile foundation cost can be reduced by more than 5%.During the construction,the mechanical drlling and walking system of cement soil mixing pile can be modified to effectively improve the construction efficiency,facilitate the construction and meet the project schedule.

关 键 词：光伏发电 劲性复合桩基 淤泥地基 水泥土搅拌桩 承载力 

分 类 号：TM615[电气工程—电力系统及自动化] TU473.1[建筑科学—结构工程]