基坑支护毕业设计7

2008届岩土工程方向毕业设计说明书邯郸市康奈大厦基坑支护设计（5.75m）专业：土木工程姓名：马煜指导教师：吴雄志河北工程大学土木工程学院河北工程大学土木工程学院毕业设计说明书2008年II摘要康奈大厦位于邯郸市陵园路北侧，西临邯山南大街，建筑面积22849m2，地上24层，地下1层，框架剪力墙结构。该工程基础埋深5m，实际基坑开挖深度为5.75m，根据场地的土层条件及邯郸市类似基坑工程的经验，为保证基坑的稳定性及尽量节省投资，经方案比选，拟采用土钉墙技术及排桩+锚杆（北侧）对该基坑进行支护。通过对拟建场地的工程地质条件分析，本工程存周围建筑物较多，北侧距离邯山区实验小学只有3.14米，工程土质不稳需采用排桩支护。南侧和其他侧面距离重要建筑物较远，均采用土钉墙支护。在本次基坑支护设计过程中，先后分析了3种方案：1.悬臂桩支护；3.土钉墙支护；3.单支点排桩支护。对于悬臂桩支护方案，通过计算，桩长需要21.5m，桩体所承受的最大弯距很大，很不合理；土钉墙支护形式适合于较浅基坑，宜采用；通过对单支点排桩和悬臂桩两种支护方案的比较，考虑到降低成本，最终决定采用单支点排桩支护，土钉墙支护，关键词：基坑支护土钉墙排桩锚杆AbstractTheKangNaibuildinglocatesinnorthsideofLingYuanroadofHanDancity,andwestsideofHanShanSouthAvenue.Itcoversanareaof22.849m2withonthegroundistwenty-fourlayerandundergroundisonelayer.theframeworkofshearwallstructure.Theworksarebasedondepthof5m,theactualexcavationdepthof5.75m.accordingtothesiteandsoilconditionssimilarexcavationworksexperienceofHandanCity,toensurethestabilityofthepitandsaveinvestmentasmuchaspossible.Tobeadoptedsoilnailingwallsandpiles+boltrow(north)tosupporttheexcavation.Throughanalyzingfortheengineeringgeologicalconditionsofthisproject,therearemanybuildingaroundthisproject.northsidedistanceHanShanexperimentprimaryschoolhaveonly3.14meters,theinstabilityofsoiltobeusedrowpilemaintenance.Thesouthsideandotherdistanceimportantbuildingsfromfurtherawaytobeusedsoilnailwallsupport.Inthepitsupportingthedesignprocess,therehasanalyzedthreetypesofschemeoneafteranother:1.Cantileverpilesupport;2.Soilnailwallsupport,3.Pile-rankedsingle-Fulcrumcare.Thecantileverpilessupportingneedthelengthof21.5m,soitisunreasonable.Soilnailwallsupporttobeusedforshallowpit.Throughthesinglefulcrumpilesandpilesofcantileversupport,takingintoaccountthelowercostsandultimatelydecidedtoadoptthesingle-rowpilessupporting,soilnailwallsupport,Keywords:PitSupport;Soilnailwall;Pileboltrow;Bolt河北工程大学土木工程学院毕业设计说明书2008年I目录0.绪论................................................................11.设计任务书...........................................................11.1工程概况............................................................11.2工程地质及水文地质概况..............................................12.设计依据............................................................22.1基坑侧壁安全等级....................................................22.2工程勘察资料........................................................32.3有关主体结构的设计资料..............................................42.4资料周围环境........................................................43.基坑设计方案的选择................................................43.1方案比较....................................................................43.2方案确定............................................................53.3地下水的处理........................................................54.基坑围护桩的设计（按照《建筑基坑支护技术规程》（JGJ120-99））.......54.1土各项指标的简化....................................................54.2土压力的计算........................................................64.3土压力零点位置......................................................64.4支撑力和土压力零点的剪力计算.......................................74.5由等值梁求算桩的入土深度............................................74.6弯矩的计算.........................................................84.7桩的配筋............................................................84.8按工况计算：.......................................................94.9腰梁设计...........................................................104.10冠梁的计算........................................................114.11位移计算（m法）..................................................125.锚杆设计...........................................................195.1锚杆参数的设计.....................................................195.2锚杆长度的计算............................................................205.3锚杆配筋计算.......................................................205.4锚杆轴向受拉承载力计算.............................................205.5基坑锚杆护壁的整体稳定性验算：.....................................206.土钉墙的设计（按照《基坑土钉技术规程》(CECS96:97)）.......226.1土钉墙尺寸设计参数确定如下.........................................22河北工程大学土木工程学院毕业设计说明书2008年II6.2土钉抗力的设计.....................................................236.3土钉墙支护内部稳定性分析..........................................276.4土钉墙支护外部稳定性分析...........................................307.经济预算分析......................................................327.1土方费用...........................................................327.2桩锚费用...........................................................327.3土钉墙费用.........................................................327.4总费用汇总表.......................................................338.施工监测方案......................................................339.应急预测方案..............................................33致谢................................................错误!未定义书签。4参考文献.............................................错误!未定义书签。5附件一：读书报告....................................错误!未定义书签。6附件二：专题报告...................................4错误!未定义书签。河北工程大学土木工程学院毕业设计说明书2008年1邯郸市康奈大厦基坑支护设计（5.75m）学生：马煜指导教师：吴雄志河北工程大学土木工程学院土木工程专业岩土工程方向0.绪论毕业设计是大学四年中学习的最后一个阶段，本次设计的目的是详细学习和了解与岩土工程相关的知识，巩固以前学习过的知识（深基坑支护、基础工程、地基处理、土力学、工程地质学等），并按照现行规范，通过对实际