严寒地区季节性冻土影响下光伏支架PHC桩基础设计的研究

STUDY ON DESIGN OF PHC PILE FOUNDATION OF PV BRACKET UNDER INFLUENCE OF SEASONAL FROZEN SOIL IN SEVERE COLD AREA

以黑龙江省齐齐哈尔市泰来县某20 MWp光伏发电项目为依托,分析了严寒地区季节性冻土条件下光伏支架采用预应力高强混凝土(PHC)管桩作为支架基础(下文简称为“PHC桩基础”)时,该基础的抗冻拔稳定性,并根据分析结果给出了PHC桩基础相关的设计建议和可采取的防冻拔措施,以抵抗冻土层产生的切向冻胀力,从而有效降低了工程造价,并提高了光伏支架基础的安全性。

Based on a 20 MW_(p) PV power generation project in Tailai County,Qiqihar City,Heilongjiang Province,this paper analyzes the anti-freeze and pullout stability of PV bracket when PHC pipe piles are used as PV bracket foundations(hereinafter referred to as“PHC pile foundations”)under seasonal frozen soil conditions in severe cold area.The results give the design suggestions related to the PHC pile foundation and the antifreezing measures that can be taken to resist the tangential frost heave force generated by the frozen soil layer,thereby effectively reducing the engineering cost and improving the safety of the PV bracket foundation.