结构工程师2023，Vol.39Issue(6)：164-170,7.
低预应力混凝土实心方桩作抗拔桩的设计与应用
Design and Application of Low-Prestressed Concrete Solid Square Pile as Uplift Pile
摘要
Abstract
The low-prestressed concrete solid square pile can be applied in building project where the demand of uplift capacity of a single pile is not high in corrosive environment.Combined with an engineering example,this paper introduced the problems and solutions of low-prestressed solid square pile as uplift pile.The low-prestressed solid square pile was applied as uplift pile,which the unfavorable situation of not entering the rock was considered,and the key parameters such as the design value of tensile bearing capacity and the characteristic value of anti-crack tensile force for first-order crack control were calculated.The uplift loading tests of three groups of different square piles were carried out,in ordor to compare and verify the reliability of pile splice technology.The results show that,the thickness of the end plate controls the uplift bearing capacity of the welding method.If the thickness of end plate is not enough,the bending failure will occur and lead to the failure of pile splice,while the mechanical splicing method is reliable and can realize the effective transmission of pull-out force.Under the same root number,compared with prestressed high-strength solid square pile and cast-in-situ pile,the low-prestressed solid square pile as uplift pile has better economic benefit.This engineering example can provide reference for other similar engineering designs.关键词
低预应力混凝土实心方桩/抗拔桩/焊接法/机械连接法/抗拔载荷试验Key words
low-prestressed concrete solid square pile/uplift pile/welding method/mechanical splicing method/uplift loading test引用本文复制引用
王传坤,毛江鸿,辛大伟,高贯鹏,高溪溪..低预应力混凝土实心方桩作抗拔桩的设计与应用[J].结构工程师,2023,39(6):164-170,7.基金项目
四川省重点研发科技项目(2022YFQ0048) （2022YFQ0048）
