資源描述:
《大樹移植專項施工方案》由會員上傳分享,免費在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、大樹移植專項施工方案一、施工概況根據(jù)設(shè)計單位提供最新的綠化修改圖,在架空層樓面西南邊的位置需種植一株“古榕”樹;該榕樹高度約為6米,胸徑約1.2米,土球直徑達2.5米,土球高度約1米左右;若按樹干鮮重約1300kg/m3,土球在天然含水狀態(tài)下容重約為1600kg/m3,此大樹的重量達16667.12kg。首先,由于此古榕樹較大,會對架空層的樓板造成巨大的壓力。根據(jù)土球的高度至少需回填1.5米厚的土層,而輕質(zhì)種植土天然含水狀態(tài)下的容重約為1400kg/m3,這樣在土球底面積的回填土壤重量為3430kg,再加上樹
2、體的重量,大樹定植的部位(土球直徑的范圍約4.9m2)平均載重為4101.45kg/m3,超出了架空層樓板3500kg/m3的荷載能力;還有,以后大樹恢復(fù)生長,冠幅達4米左右時,估計其加重大約1500kg,那么大樹定植位置的平均載重可能有4407.58kg/m3。其次,大樹定植在建筑物風口位置,并種植在架空層樓面,而土層厚度設(shè)計為1.5米,大樹的根系得不到深度的發(fā)展,就很容易被大風吹倒。因此,為確保施工的順利進行,消除日后的安全隱患和保證大樹的成活,制定此大樹種植的施工方案。二、施工準備1、改變原來定植的位置
3、結(jié)合原來設(shè)計定植位置周邊的景觀效果考慮,把古榕樹的定植位置移到首層樓面C軸(2-8)上的QZJ1A柱的上方,deformationsmall;DangengineeringpilealsoforperfusionpileShi,cansynchronizationconstruction,toconstructionconducivetoorganization,andconvenient,anddurationshort;pilebetweengapeasycausedsoilerosion,special
4、Shiinhighlevelsoftclayqualityarea,neededaccordingtoengineeringconditionstakenotepulp,andcementmixingpile,andspinspraypile,constructionmeasurestosolutionblockwaterproblem;Suitableforsoftclayeyandsandyareas,butconstructionshouldbeusedwithcautioninthegraveland
5、pebbles;betweenpileandpilethroughthepiletopbeamandwallpurlinsintooverallandthusrelativelypooroverall,asinimportantareas,specialprojectsandlargeFoundationpitinexcavationdepthapplicationrequiresspecialcare.2.1.6steelpilesusingsteelpilessupportingtheFoundation
6、pitfortemporarysupportfeatures,constructionconvenient,short,finishedconstructioninFoundationpitbackfillafterthechannelpulledout,re-use,canminimizethecostofsupport.Usedsteelpilessupportingafatalweakness,thatisimpervioustowaterandsmallsoilparticles,andalsocal
7、ledashighwaterprecipitationorwater,andtheundergroundwaterlevelishigh,water-richgeologicalconditionsdidnotmatch.Flexuralcapacityofsteelsheetpilesupportingweakerexcavationdepthdoesnotexceed4mdeflectionofmoregeneralapplication.ObviouslythesoftwaterofFoundation
8、pitexcavationdepthofgeologicalconditionsof10m,andislocatedinthecitycentresofFlex...Limitedto,workhard,anditcantakefulladvantageofbuildinglinethewallswithinalimitednumberofgroundandspace,cangivefullplay