摘要
为了解决浅强持力层预应力管桩单桩承载力和桩身强度匹配问题，采用端承为主、摩擦为辅的桩型设计，以桩身允许抗压强度作为终压值PU和试验检测极限值的依据，通过探孔、静压、送桩、桩尖持力层强挤密、终压值控制、稳压和注浆技术，在相同桩型、桩长和压桩工艺条件下提高单桩承载力30％～40％，有效减少桩基初始和不均匀沉降，从根本上解决资源浪费和节约桩基设计、施工成本。
In order to resolve the shallow strong supporting layer prestressed pipe pile capacity and pile strength matching problem, this paper adopted end bearing friction supplemented pile design on the base of the final pressure value PU and detection limit value. Through exploring holes, static pressure, sending piles, pile tip bearing stratum strong compaction, final pressure value control, regulation and grouting technology, under the same type of pile, pile length and pile pressure conditions, this kind of design can increase the pile bearing capacity of 30% to 40%, effectively reduce the initial pile and uneven settlement, fundamentally solve the dilemma of waste of resources and finally meet the requirement of conservation of pile design and low construction costs.
出处
《施工技术》
CAS
北大核心
2014年第19期61-64,共4页
Construction Technology
关键词
桩基础
管桩
静压桩
承载力
施工技术
piles
pipe piles
static pressure piles
bearing capacity
construction
