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毕业设计报告（论文）课题名称XX城X号地块商业项目基坑支护设计专业土木工程学号学生姓名指导教师负责教师起讫日期工作地点XX年X月X日-1-XX城X号地块商业项目基坑支护设计计算书摘要XX城X号地块商业项目场地位于XX板块的西南部，XX东侧，XX街北侧，XX北侧，XX工程南侧，设2层地下室。地下室基坑开挖深度11.0m。根据提供的岩土工程勘察报告、基坑设计平面图以及周边环境条件对该基坑的支护结构进行设计。确定支护方案为：采用排桩支护，三轴深层搅拌桩为止水帷幕，设两道钢筋混凝土支撑，立柱采用钢格构柱，设置冠梁。手算内容包括：土压力计算、支撑轴力计算（包括内力计算及配筋）、支护桩设计及内力计算（包括配筋）、立柱计算、止水帷幕设计及降水井设计。其中除拆撑后支撑轴力计算采用弹性法外，其他计算过程均采用经典法。电算利用理正深基坑软件进行结构设计，并与手算结果对比。利用CAD绘制施工图，完成一份计算书。关键词：深基坑，排桩支护，止水帷幕，钢格构柱-2-RetainingandprotectionoffoundationexcavationofXXcityXthcommercialprogramAbstractYanlordXXcityblockXcommercialprojectislocatedinthesouthwestofXXXsports,XXroadontheeastsideofXXrivernorthofweststreet,XXroad,southareaofthreephaseoftheXXcityset2layerofthebasement.Thebasementfoundationpitexcavationdepthof11.0m.Accordingtothegeotechnicalengineeringinvestigationreport,thefoundationpitdesignplanandthesurroundingenvironmentconditiontodesignthefoundationpitsupportingstructure.Supportschemewasconfirmedasthefollowing:adoptingpilesupporting,triaxialdeepmixingpilewatercurtain,reinforcedconcretesupport,setuptwocolumnsusingsteellatticecolumn,setthecrownbeam.Handworkcontentincluding:soilpressurecalculation,strutaxialforcescalculation(includinginternalforcecalculationandreinforcement),supportingpiledesign,calculationofinternalforce(includingreinforcement),pillarcalculation,designandstopwaterheavycurtaindewateringwelldesign.Afteritinadditiontosupportingstrutaxialforcescalculatedwithelasticmethod,othercalculationsusingtheclassicalmethod.Computersoftwareisusedindeepfoundationpitstructuredesign,andcomparedwithhandtocalculatetheresults.UseofCADdrawingconstructiondrawing,completeacalculation.Keywords:deeppit,rowpileretaining,waterproofcurtain,steellatticedcolumn-3-目录摘要................................................................1Abstract............................................................2第一章设计资料......................................................81.1概述.........................................................81.1.1工程概况...............................................81.1.2基坑周边环境条件.......................................81.1.3工程地质条件...........................................81.1.4基坑侧壁安全等级及重要性系数..........................101.2设计总说明..................................................101.2.1设计原则..............................................101.2.2设计依据..............................................111.2.3支护结构方案..........................................111.3基坑监测....................................................12第二章排桩结构设计.................................................132.1设计计算有关参数............................................132.1.1地质计算参数..........................................132.1.2计算区段的划分........................................132.1.3计算方法..............................................132.1.4土压力系数计算........................................132.2区段①排桩设计计算..........................................142.2.1土层分布..............................................142.2.2土层侧向主动土压力计算................................142.2.3开挖至7.0m处时土层侧向被动土压力计算.................162.2.4开挖至11.0m处时土层侧向被动土压力计算................162.2.5第一道支撑轴力计算....................................172.2.6第二道支撑轴力计算....................................172.2.7排桩弯矩计算..........................................182.2.8排桩剪力计算..........................................192.2.9排桩配筋计算..........................................192.2.10嵌固深度计算.........................................212.3区段②排桩设计计算..........................................212.3.1土层分布..............................................212.3.2土层侧向主动土压力计算................................212.3.3开挖至7.0m处时土层侧向被动土压力计算.................232.3.4开挖至11.0m处时土层侧向被动土压力计算................232.3.5第一道支撑轴力计算....................................242.3.6第二道支撑轴力计算....................................25-4-2.3.7排桩弯矩计算..........................................262.3.8排桩剪力计算..........................................262.3.9排桩配筋计算..........................................262.3.10嵌固深度计算.........................................282.4区段③排桩设计计算..........................................292.4.1土层分布..............................................292.4.2土层侧向主动土压力计算................................292.4.3开挖至7.0m处时土层侧向被动土压力计算.................302.4.4开挖至11.0m处时土层侧向被动土压力计算................302.4.5第一道支撑轴力计算....................................312.4.6第二道支撑轴力计算....................................322.4.7排桩弯矩计算..........................................322.4.8排桩剪力计算..........................................332.4.9排桩配筋计算..........................................332.4.10嵌固深度计算.........................................352.5区段④排桩设计计算..........................................362.5.1土层分布..............................................362.5.2土层侧向主动土压力计算................................362.5.3开挖至7.0m处时土层侧向被动土压力计算.................372.5.4开挖至11.0m处时土层侧向被动土压力计算................382.5.5第一道支撑轴力计算....................................392.5.6第二道支撑轴力计算....................................392.5.7排桩弯矩计算..........................................402.5.8排桩剪力计算..........................................402.5.9排桩配筋计算.........