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(中交第三航務(wù)工程勘察設(shè)計(jì)有限公司， 上海 200032)

摘要: 對(duì)滿堂地下車庫(kù)的純地下室部分，目前設(shè)計(jì)中大多采用平板柱帽式筏板基礎(chǔ)，采用 JCCAD 或 YJK 軟件進(jìn)行有限元分析。 對(duì)軟件計(jì)算的結(jié)果，混規(guī)要求“應(yīng)對(duì)分析結(jié)果進(jìn)行判斷和校核，在確認(rèn)其合理、有效后方可用于工程設(shè)計(jì)”，但目前缺少校核手段。 針對(duì)該問題，從分析筏板地基土變形特征及受力特點(diǎn)入手，推導(dǎo)出由高水位控制筏板內(nèi)力的近似解析解，并給出由裂縫控制配筋的計(jì)算公式。 最后，通過工程算例對(duì)比分析解析解和有限元計(jì)算結(jié)果，論證了解析解的正確性，為設(shè)計(jì)提供一種校核手段。

關(guān)鍵詞: 柱帽；筏板基礎(chǔ)；基礎(chǔ)內(nèi)力；近似解析解；強(qiáng)度控制；裂縫控制

中圖分類號(hào):TU470+. 3 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):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， 碩士， 一級(jí)注冊(cè)結(jié)構(gòu)工程師， 主要從 事 鋼 筋 混 凝 土 結(jié) 構(gòu)、 鋼 結(jié) 構(gòu) 計(jì) 算 和 應(yīng) 用 方 面 的 研 究， Email:kongfanfeng1121@ theidi. com。

[引用本文] 孔凡峰，包筑雄. 純地下室平板柱帽式筏板基礎(chǔ)設(shè)計(jì)探討[ J]. 建筑結(jié)構(gòu)，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.