(中交第三航务工程勘察设计有限公司， 上海 200032)

摘要: 对满堂地下车库的纯地下室部分，目前设计中大多采用平板柱帽式筏板基础，采用 JCCAD 或 YJK 软件进行有限元分析。 对软件计算的结果，混规要求“应对分析结果进行判断和校核，在确认其合理、有效后方可用于工程设计”，但目前缺少校核手段。 针对该问题，从分析筏板地基土变形特征及受力特点入手，推导出由高水位控制筏板内力的近似解析解，并给出由裂缝控制配筋的计算公式。 最后，通过工程算例对比分析解析解和有限元计算结果，论证了解析解的正确性，为设计提供一种校核手段。

关键词: 柱帽；筏板基础；基础内力；近似解析解；强度控制；裂缝控制

中图分类号:TU470+. 3 文献标志码:A 文章编号:1002￣848X(2022)01￣0133￣05

DOI:10. 19701 / j. jzjg. 20200278

Discussion on design of flat column cap raft foundation in pure basement

KONG Fanfeng， BAO Zhuxiong

(CCCC Third Harbor Consultants Co.， Ltd.， Shanghai 200032， China)

Abstract: For the pure basement part of the full underground garage， the flat column cap raft foundation is mostly used inthe current design， and the finite element analysis is done with JCCAD or YJK software. For the calculation results ofsoftware， the concrete code requires that " the analysis results should be judged and checked， and can be used inengineering design only after they are confirmed to be reasonable and effective" ， but now lacking the means of checking. Inview of this problem， starting from analyzing the deformation characteristics and stress characteristics of the raft foundationsoil， the approximate analytical solution of the raft internal force controlled by high water level was deduced， and thecalculation formula of reinforcement by crack control had been given. Finally，the correctness of the analytical solution wasproved by comparing the analytical solution with the finite element calculation results， which provides a means of checkingthe design.

Keywords:column cap；raft foundation；foundation inter force；approximate analytical solution；strength control；crackingcontrol

第一作者:孔凡峰， 硕士， 一级注册结构工程师， 主要从 事 钢 筋 混 凝 土 结 构、 钢 结 构 计 算 和 应 用 方 面 的 研 究， Email:kongfanfeng1121@ theidi. com。

[引用本文] 孔凡峰，包筑雄. 纯地下室平板柱帽式筏板基础设计探讨[ J]. 建筑结构，2022，52( 1):133￣137.KONG Fanfeng，BAO Zhuxiong. Discussion on design of flat column cap raft foundation in pure basement[ J]. BuildingStructure，2022，52(1):133￣137.