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A platform for research: civil engineering, architecture and urbanism
Three-shaft mixing pile supporting structure of large round foundation pit and construction method of three-shaft mixing pile supporting structure
The invention relates to the field of open excavation deep foundation pit engineering construction, in particular to a large round foundation pit three-shaft mixing pile supporting structure and a construction method thereof.The large round foundation pit three-shaft mixing pile supporting structure is characterized in that the large round foundation pit three-shaft mixing pile supporting structure comprises cement pile bodies evenly distributed around the circumference, a top beam, surrounding purlins and a slope protection body, and the top beam is connected to the upper ends of the cement pile bodies; the enclosing purlin is parallel to the top beam and is arranged on the cement pile body below the top beam, the upper end of the cement pile body protrudes out of the earth surface and is connected with the slope protection body, the cement pile body is formed by punching and grouting through a three-shaft mixing pile machine, internally-inserted H-shaped steel is arranged in the cement pile body at intervals, and a concrete cushion layer is arranged at the elevation position of the base of the foundation pit. Compared with the prior art, the structure has the beneficial effects that the crown beam and the enclosing purlins are in the circular ring shape and play a role of annular supporting, so that earthwork can be excavated without arranging an inner support when a large round foundation pit is excavated, the economy is good, and dismounting is not needed in the later period. The concrete cushion poured on the lower portion of the enclosing purlin is super-flat, and the construction quality of the enclosing purlin can be effectively guaranteed.
本发明涉及明挖深基坑工程施工领域，尤其涉及一种大型圆基坑三轴搅拌桩支护结构及其施工方法，其特征在于，包括绕圆周均匀分布的水泥桩体、冠梁、围檩和护坡体，冠梁连接于水泥桩体的上端，围檩平行冠梁设于冠梁的下方的水泥桩体上，水泥桩体的上端突出地表并与护坡体相连接，所述水泥桩体为三轴搅拌桩机打孔注浆制成，水泥桩体内隔一插一设有内插H型钢，基坑的基底标高处设有混凝土垫层。与现有技术相比，本发明的有益效果是：因冠梁与围檩呈圆环型，起到环形支撑的作用，故在开挖大型圆基坑时无需设置内支撑即可开挖土方，经济性好，后期无需拆除。通过在围檩下部浇筑混凝土垫层超平，能有效保证围檩的施工质量。
Three-shaft mixing pile supporting structure of large round foundation pit and construction method of three-shaft mixing pile supporting structure
The invention relates to the field of open excavation deep foundation pit engineering construction, in particular to a large round foundation pit three-shaft mixing pile supporting structure and a construction method thereof.The large round foundation pit three-shaft mixing pile supporting structure is characterized in that the large round foundation pit three-shaft mixing pile supporting structure comprises cement pile bodies evenly distributed around the circumference, a top beam, surrounding purlins and a slope protection body, and the top beam is connected to the upper ends of the cement pile bodies; the enclosing purlin is parallel to the top beam and is arranged on the cement pile body below the top beam, the upper end of the cement pile body protrudes out of the earth surface and is connected with the slope protection body, the cement pile body is formed by punching and grouting through a three-shaft mixing pile machine, internally-inserted H-shaped steel is arranged in the cement pile body at intervals, and a concrete cushion layer is arranged at the elevation position of the base of the foundation pit. Compared with the prior art, the structure has the beneficial effects that the crown beam and the enclosing purlins are in the circular ring shape and play a role of annular supporting, so that earthwork can be excavated without arranging an inner support when a large round foundation pit is excavated, the economy is good, and dismounting is not needed in the later period. The concrete cushion poured on the lower portion of the enclosing purlin is super-flat, and the construction quality of the enclosing purlin can be effectively guaranteed.
本发明涉及明挖深基坑工程施工领域，尤其涉及一种大型圆基坑三轴搅拌桩支护结构及其施工方法，其特征在于，包括绕圆周均匀分布的水泥桩体、冠梁、围檩和护坡体，冠梁连接于水泥桩体的上端，围檩平行冠梁设于冠梁的下方的水泥桩体上，水泥桩体的上端突出地表并与护坡体相连接，所述水泥桩体为三轴搅拌桩机打孔注浆制成，水泥桩体内隔一插一设有内插H型钢，基坑的基底标高处设有混凝土垫层。与现有技术相比，本发明的有益效果是：因冠梁与围檩呈圆环型，起到环形支撑的作用，故在开挖大型圆基坑时无需设置内支撑即可开挖土方，经济性好，后期无需拆除。通过在围檩下部浇筑混凝土垫层超平，能有效保证围檩的施工质量。
Three-shaft mixing pile supporting structure of large round foundation pit and construction method of three-shaft mixing pile supporting structure
一种大型圆基坑三轴搅拌桩支护结构及其施工方法
QI XIAO (author) / SUN PENG (author) / WANG MIN (author) / ZHANG RONGFU (author) / GUAN HONGSHENG (author)
2022-06-14
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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