毕业设计（论文）-上海实业办公楼基坑工程支护设计

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1、摘要上海实业办公楼基坑工程支护设计，该工程基坑面积1500m²，场地位于上海市西南外围，沿元江路中心线分布，西起沪闵路，东至虹梅南路间.本工程为24层商办楼1栋，16层住宅楼3栋，基坑周长为30×50m，基坑深9.6m。基坑支护的要求有：保证基坑四周边破稳定性，保护基坑四周相邻建筑物和地下管线在基坑工程施工期间不受损害，保证基坑工程施工作业面在地下水位以上。如何对此基坑进行支护，可采取如下四种方案：桩墙锚杆支护结构、土钉墙与防渗帷幕支护体系、水泥土搅拌桩支护和SMW工法支护。由于桩墙锚杆支护结构在计算锚杆时锚固段过长，不符实际，予以排除；水泥土搅拌桩，各项系数都已取到

2、最大仍不符合要求，也予以排除；SMW工法比较适用于本工程，但造价较高，且此种方法在国内尚不完善，很多都为经验结果，工程保障不大故也排除不用，最后选用土钉墙支护。土钉墙支护不但可节省造价，且施工快速，方便，无噪音，无环境污染，具有较好的发展前景。土钉墙可看作一个重力式挡土墙，土钉间距为1.25m，长7.7m，土钉杆直径为32mm，其倾斜角度为12°。止水帷幕为水泥土搅拌桩墙，只是简单的隔水，对强度无严格要求，所以比较经济合理。AbstractTheengineeringisbracingoffoundationpitdesignofShanghaigladindustr

3、yandcommerceofficeofrainbowbuilding.Thefoundationpitareasis1500m2.ThebuildingislocatedthesouthwesternperipheryofShanghaicity,anddistributingalongYuanJianglu'scentreline.Theengineeringincludesisa24-storeybuildingand316-stroeyresidencebuilding.Thepitperimeterid30×50m,thedepthis9.6m.Requir

4、ementsofbracingoffoundationpitinclude:ensuringfoundationpitslopestabilityandallaroundbuildingsandundergroundlineinbracingoffoundationpitconstruction,andfoundationpitconstructionworkingfaceabovethegroundwaterlevel.Howtobrace,fourkindsofschemescanbeadoptedasfollows:wallanchorpoleprotrudes

5、toprotectstructureandsoilnailwallandguardingagainstandoozesthattheheavycurtainprotrudestoprotectsystemandcement-mixingpileandbracingofSMWmethod.Soilnailwallisadoptedlast,becauseanchoragelengthofanchoristoolonginbracingofpilingwallandanchorandcement-mixingpilecannotmeetrequirementandcons

6、tructioncostofSWMmethodistooexpensive.Notonlythatsoilnailwallcansaveconstructioncost,andconstructionperiodisshort,andconvenient,noenvironmentpollution,andalsopossessesthebetterdevelopmentforeground.Soilnailwallcanberegardedasthegravitytyperetainingwall.Thesoilnailintervalis1.25m,andthel

7、engthis7.7m.Soilnaildiameteris32mm,anditsbankangledegreeservesas12°.Preventingwaterheavycurtainadoptscement-mixingpilingwall,forseparateswatermerely,sothemethodisfairlyeconomy.目录1.工程概况·····························································11.1环境概况·························