河北工程大学土木工程学院毕业设计说明书2008年毕业设计说明书邯郸市康奈大厦基坑支护设计（深度4.75m）专业：土木工程姓名：指导教师：河北工程大学土木工程学院摘要邯郸市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8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4.75m，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3.41米，工程土质较差需采用排桩维护。南侧和其他侧面距离重要建筑物较远，均采用人工放坡度土钉墙支护，细部设计见后文说明。在本次基坑支护设计过程中，先后分析了4种方案：1.悬臂桩支护；2.水泥土搅拌桩3.土钉墙支护；4.单支点排桩支护。对于悬臂桩支护方案，通过计算，桩长需要16m，桩体所承受的最大弯距较大，不合理；又因为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AbstractTheKangNaibuildinglocatesinnorthsideofLingYuanroadofHanDancity,andintheeastofHanShanSouthAvenue.Itcoversanareaof22.849m2withonthegroundistwenty-fourlayerandundergroundisonelayer.Itistheframeworkofshearwallstructure.Theworksarebasedondepthof5m,theactualexcavationdepthis4.75m.accordingtothesoilconditionsofthesiteandsimilarexcavationworksexperienceofHanDanCity,toensurethestabilityofthepitandsaveinvestmentasmuchaspossible.Tobeadoptedsoilnailingwallsandpiles+boltrow(north)tosupporttheexcavation.Throughanalyzingfortheengineeringgeologicalconditionsofthisproject,therearemanybuildingaroundthisproject.ThedistanceoftheprojectandHanShanexperimentprimaryschoolhaveonly3.41meters,theinstabilityofsoiltobeusedrowpilemaintenance.Thedistancefromthesouthsideandotherstoimportantbuildingsisfurtheraway.Soitistobeusedsoilnailwallsupport.Inthepitsupportingthedesignprocess,therehasanalyzedfourtypesofschemeoneafteranother:1.Cantileverpilesupport;2.cement-soilwall3.Soilnailingwallsupport,4.Pileinrowsingle-Fulcrumcare.Thecantileverpilessupportingneedthelengthof16m,soitisunreasonable.Soil-nailingwallsupportisusuallytobeusedforshallowpit.Throughcomparingthesinglefulcrumpilesandpilesofcantileversupport,takingintoaccountthelowercostsandultimatelydecidedtoadoptthesingle-rowpilessupporting,soilnailwallsupport。Keywords:PitSupport;Soilnailing-wall;Pilesinrow;目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc201119993"0绪论PAGEREF_Toc201119993\h1HYPERLI