左手抗浮 右手减沉——抗浮车库中桩基抗拔与抗压的实践研究  

Left Hand Anti-floating,Right Hand Sinking——Anti-floating and Compressive Resistance of Pile Foundation in Garage Foundation

作　　者：王欲秋 杜鹏 WANG Yuqiu;DU Peng(Jinan City Planning and Design Institute,Jinan 250101,China;Shandong Tongyuan Design Group Co.,Ltd.,Jinan 250101,China)

机构地区：[1]济南市规划设计研究院,济南250101 [2]同圆设计集团股份有限公司,济南250101

出　　处：《结构工程师》2023年第1期155-160,共6页Structural Engineers

摘　　要：地下车库采用桩基抗浮时,其受压工况的计算一直不太明确。结合工程实例,分别在单层和两层抗浮车库中,采用柱墩筏板+抗拔桩(减沉桩)的基础形式,桩基数量以抗浮工况确定,受压工况下采用减沉疏桩复合桩基的设计方式,实现以最少的桩基数量满足抗浮又能合理发挥天然土层承载力的目的,达到安全、经济、受力合理的目的。该方法是一种较为简化的设计方法,但其理论依据清晰,安全度可以满足要求。Combined with engineering examples,in the case of a single-storey garage and a two-storey garage respectively,the foundation form of raft and column pier and anti-uplift pile(reduced settlement pile)is adopted,and the number of anti-uplift piles is calculated according to the anti-floating requirements;undercolumn compensation piles,four piles under the column are used in this project to balance the settlement in two directions;the method of inverted beam and girder floor is used to verify the high water level anti-floating requirements of the foundation;the composite foundation method is used to verify that the water level is below the foundation;strive to achieve reasonable calculations for both anti-floating and compressive working conditions.This method is a relatively simplified algorithm,but it relies on the refinement of parameters such as soil coefficient of subgrade reaction,pile stiffness coefficient,and cap effect coefficient.

关 键 词：抗浮 抗压 减沉疏桩基础 复合桩基 筏板基础 

分 类 号：TU473.1[建筑科学—结构工程]