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1、大树移植专项施工方案一、施工概况根据设计单位提供最新的绿化修改图,在架空层楼面西南边的位置需种植一株“古榕”树;该榕树高度约为6米,胸径约1.2米,土球直径达2.5米,土球高度约1米左右;若按树干鲜重约1300kg/m3,土球在天然含水状态下容重约为1600kg/m3,此大树的重量达16667.12kg。首先,由于此古榕树较大,会对架空层的楼板造成巨大的压力。根据土球的高度至少需回填1.5米厚的土层,而轻质种植土天然含水状态下的容重约为1400kg/m3,这样在土球底面积的回填土壤重量为3430kg,再加上树
2、体的重量,大树定植的部位(土球直径的范围约4.9m2)平均载重为4101.45kg/m3,超出了架空层楼板3500kg/m3的荷载能力;还有,以后大树恢复生长,冠幅达4米左右时,估计其加重大约1500kg,那么大树定植位置的平均载重可能有4407.58kg/m3。其次,大树定植在建筑物风口位置,并种植在架空层楼面,而土层厚度设计为1.5米,大树的根系得不到深度的发展,就很容易被大风吹倒。因此,为确保施工的顺利进行,消除日后的安全隐患和保证大树的成活,制定此大树种植的施工方案。二、施工准备1、改变原来定植的位置
3、结合原来设计定植位置周边的景观效果考虑,把古榕树的定植位置移到首层楼面C轴(2-8)上的QZJ1A柱的上方,deformationsmall;DangengineeringpilealsoforperfusionpileShi,cansynchronizationconstruction,toconstructionconducivetoorganization,andconvenient,anddurationshort;pilebetweengapeasycausedsoilerosion,special
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