高层建筑抗拔桩设计优化研究  

Study on Design Optimization of Uplift Piles for High-rise Buildings

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作  者:苏威 SU Wei(Shenzhen Tianjian Third Construction Engineering Co.,Ltd.,Shenzhen 518172,Guangdong,China)

机构地区:[1]深圳天健第三建设工程有限公司,广东深圳518172

出  处:《建筑施工》2024年第12期2105-2109,共5页Building Construction

基  金:深圳市政集团有限公司课题(深市政〔2022〕71号-13)。

摘  要:高层建筑基础在结构设计中具有重要地位,关系到建筑的稳定性和安全性,还影响到项目总造价和工期。因此,抗拔桩选型应综合考虑不同的地基土层性质、水文条件、周边环境和施工条件等各类影响因素,以确定合理的桩型及桩长。以深圳回龙埔社区某高层建筑综合项目为依托,根据场地地质勘察和土层分析,通过抗拔桩静载试验,进行了桩基形式和布置方式的优化。原方案抗浮依靠土层摩擦力及旋挖灌注桩自重,由于土层的抗拔摩阻力太小且成孔过程采用泥浆护壁,效率较低。优化方案采用嵌岩灌注桩,利用嵌岩段的高摩擦力,使桩数减少了56.7%,总造价节约40%,工期节约44.7%。由此可见,基础设计方案对项目成本、工期、施工质量等具有重要影响。The foundation of high-rise buildings plays a crucial role in structural design,affecting both the stability and safety of the structure,as well as the overall project cost and duration.Therefore,determining the appropriate type and length of uplift piles requires careful consideration of factors such as soil layer properties,hydrological conditions,surrounding environment,and construction conditions.Based on a high-rise building project in Shenzhen's Huilongpu community,pile foundation forms and layouts were optimized through site geological surveys,soil layer analyses,and uplift pile static load tests.The original design relied on soil friction and the self-weight of rotary excavation cast-in-place piles,but due to the low anti-uplift friction and inefficiencies in the slurry wall formation process,an optimized design utilizing rock-socketed castin-place piles was proposed.This solution utilize the high friction of the rock-socketed section,reducing pile numbers by 56.7%,cutting total costs by 40%,and shortening the construction period by 44.7%.The results demonstrate that foundation design has a significant impact on project costs,timeline,and construction quality.

关 键 词:高层建筑 抗拔桩 设计优化 静载试验 经济效益分析 

分 类 号:TU974[建筑科学—建筑技术科学]

 

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