地下结构周边梁板踏步式逆作施工方法技术

本发明专利技术公开了一种地下结构周边梁板踏步式逆作施工方法，其特征在于，分层开挖周边逆作区，并逐一完成周边逆作梁板结构，使地下结构周边逆作区面积自上而下逐层扩大，形成“盆式踏步型”，中心顺作区域为敞开式；待周边全部逆作梁板结构完成后，再敞开式开挖中心区域土方顺作施工。本发明专利技术提高了土方开挖施工效率，据测算，土方车下坑后出土速度可达到常规全逆作法顶层装土速度２倍以上；加快施工工期、减少基坑变形，变形量仅为同类基坑的５０％；改善施工条件，基坑中心为敞开式，通风、供氧、采光较充足，减少逆作施工的照明、送风设备的投入。

Method for reverse construction of surrounding beam and slab step type of underground structure

The invention discloses an underground structure surrounding the beam step inverse construction method, which is characterized in that the peripheral inverse for stratified excavation area, and each completed peripheral inverse beam slab structure, the underground structure surrounding the inverse area from top to bottom layer by layer expansion, the formation of \basin type step\, along the regional center is open to all around; the inverse beam slab structure after completion, then open excavation earthwork construction along the central region. The invention improves the efficiency of construction excavation, it is estimated that the earth under the car speed up to the conventional pit excavated fully reverse soil top speed of more than 2 times; accelerate the construction period, reduce the deformation of the foundation pit, deformation is only 50% of similar foundation pit excavation; improve the construction conditions, the heart is open, ventilation, oxygen supply lighting is adequate, reducing reverse construction lighting, ventilation equipment investment.

【技术实现步骤摘要】

【技术保护点】
一种地下结构周边梁板踏步式逆作施工方法，其特征在于，分层开挖周边逆作区，并逐一完成周边逆作梁板结构，使地下结构周边逆作区面积自上而下逐层扩大，形成“盆式踏步型”，中心顺作区域为敞开式；待完成周边全部逆作梁板结构完成后，再敞开式开挖中心区域土方顺作施工。

【技术特征摘要】

【专利技术属性】
技术研发人员：朱毅敏，黄玉林，周臻全，彭韬，宋晓星，于成杰，
申请(专利权)人：上海市第一建筑有限公司，
类型：发明
国别省市：31[中国|上海]