- 摘 要
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(中冶建筑研究總院有限公司, 北京 100088)
[摘要]通過對CFG樁復(fù)合地基與鋼筋混凝土獨立基礎(chǔ)計算理論和計算方法進(jìn)行梳理和理論分析,并結(jié)合同一框架結(jié)構(gòu)單元采用不同基礎(chǔ)埋深工程設(shè)計算例,運用現(xiàn)代化計算機輔助設(shè)計技術(shù),詳細(xì)論述CFG樁復(fù)合地基與鋼筋混凝土獨立基礎(chǔ)設(shè)計計算全過程。工程設(shè)計實踐和研究表明,相同的CFG樁端標(biāo)高和面積置換率也適用于不同基礎(chǔ)埋深的CFG樁復(fù)合地基和基礎(chǔ)結(jié)構(gòu)設(shè)計。利用所提出的現(xiàn)代化計算機輔助設(shè)計技術(shù),考慮不同基礎(chǔ)埋深、基底下土層厚度分布和相鄰基礎(chǔ)荷載影響及選用對應(yīng)于每層土實際應(yīng)力狀態(tài)的天然地基壓縮模量的CFG樁復(fù)合地基變形計算方法,既符合工程實際情況,又滿足規(guī)范要求。
[關(guān)鍵詞]CFG樁復(fù)合地基; 鋼筋混凝土獨立基礎(chǔ); 基礎(chǔ)埋深; 土層分布; 計算全過程; 應(yīng)力狀態(tài)
中圖分類號:TU473文獻(xiàn)標(biāo)識碼:A文章編號:1002-848X(2015)11-0075-06
Design on CFG pile composite foundation and reinforced concrete independent foundation
Dang Yujing
(Central Research Institute of Building and Construction MCC, Beijing 100088, China)
Abstract:The calculation theories and calculation methods for cement fly-ash gravel (CFG) pile composite foundation and reinforced concrete independent foundation were reviewed and theoretically analyzed. Combined with the same frame structure unit with different foundation depths in different engineering design examples, calculation whole process of CFG pile composite foundation and reinforced concrete independent foundation design was introduced in detail by using modern computer aided design technique.
Engineering design practice and research show that the same CFG pile tip elevation and area replacement ratio are also applicable to CFG pile composite foundation and foundation structure design with different foundation depths. Using the proposed modern computer aided design technique and taking effects of foundation depth, substrate soil thickness distribution and adjacent foundation load into consideration, the proposed CFG pile composite foundation deformation calculation method adopted compression modulus of natural foundation corresponding to the practical of stress state of each layer of soil, which is consistent with the actual situation of the project and meets the requirements of specifications.
Keywords:CFG pile composite foundation; reinforced concrete independent foundation; foundation depth; soil distribution; calculation whole process; stress state
作者簡介:黨昱敬,教授級高級工程師,注冊土木工程師(巖土),Email:dyj765@sina.com。
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