【正文】 bracing design method. 周乘風(fēng)：某辦公樓樁基礎(chǔ)和基坑支護(hù)設(shè)計(jì) II This design USES a precast concrete piles and piles of soil nailing wall design and foundation pit supporting structure. In the process of putation in soil pressure, using the Rankine39。s earth pressure theory。 In the process of putation in reinforcement, refer to the mix clay structure design codes。 When in precipitation processing design reference the building foundation pit supporting technical procedures。 In the process of putation in addition to the current national construction of foundation pit engineering based on technical specification outside, still a lot of the actual experience to use them, to strengthen the bination of theory with practice. The design of the main guiding principle is how to guarantee the safety of pile foundation and foundation pit construction, reliability, convenience and achieve economic effect. Through this paper, intuitive explains the foundation pit bracing design all kinds of parameters. Keywords: Pile foundation design。 Foundation pit bracing design。 Soilnail wall。 campshed； drainage of foundation pit 目 錄 引 言 ........................................................................................................................................ 1 第 1 章 樁基礎(chǔ)設(shè)計(jì) ................................................................................................................ 3 工程概況 和地質(zhì)條件 ............................................................................................................... 4 樁基礎(chǔ)（預(yù)應(yīng)力混凝土管樁）方案設(shè)計(jì) ................................................................................... 4 確定單樁極限承載力標(biāo)準(zhǔn)值以及樁數(shù)和承臺(tái)底面尺寸 .............................................................. 5 樁頂作用驗(yàn)算 ......................................................................................................................... 6 樁基沉降驗(yàn)算 ......................................................................................................................... 7 樁基軟弱下臥層承載力驗(yàn)算 .................................................................................................... 8 樁身結(jié)構(gòu)設(shè)計(jì)計(jì)算 .................................................................................................................. 9 承臺(tái)結(jié)構(gòu)設(shè)計(jì)計(jì)算 .................................................................................................................. 9 預(yù)制樁施工組織設(shè)計(jì) ............................................................................................................. 12 第 2 章 灌注樁樁基礎(chǔ)設(shè)計(jì) .................................................................................................. 14 持力層及樁型選擇 ................................................................................................................ 14 單樁承載力的確定 ................................................................................................................ 14 樁數(shù)和樁的布置 .................................................................................................................... 15 樁頂作用驗(yàn)算 ....................................................................................................................... 15 樁基沉降驗(yàn)算 ....................................................................................................................... 16 樁基軟弱下臥層承載力驗(yàn)算 .................................................................................................. 17 樁身結(jié)構(gòu)設(shè)計(jì)計(jì)算 ................................................................................................................ 18 樁身配筋 .............................................................................................................................. 21 灌注樁施工組織設(shè)計(jì) ............................................................................................................. 21 第 3 章 基坑支護(hù)設(shè)計(jì) .......................................................................................................... 23 安徽工程大學(xué)畢業(yè)設(shè)計(jì)（論文） III 工程 概況和地質(zhì)條件 ............................................................................................................. 23 井點(diǎn)降水設(shè)計(jì) ....................................................................................................................... 24 土層壓力計(jì)算 ....................................................................................................................... 25 基坑圍護(hù)結(jié)構(gòu)及支護(hù)方案設(shè)計(jì) ............................................................................................... 27 方案設(shè)計(jì)及計(jì)算 .................................................................................................................... 27 施工組織設(shè)計(jì) ....................................................................................................................... 31 結(jié)論與展望 .............................................................................................................................. 33 致 謝 .................................................................................................................................. 34 參考文獻(xiàn) .................................................................................................................................. 35 附 錄 .................................................................................................................................. 36 插圖清單 圖 11 樁基及土層分布示意圖 ................................................................................................ 5 圖 12 樁立面布置圖 ................................................................................................................ 6 圖 13 預(yù)制樁平面布置圖 ........................................................................................................ 6 圖 14 承臺(tái)受柱沖切示意圖 .................................................................................................. 10 圖 15 承臺(tái)受角樁沖切示意圖 ..............................................................................................