Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method of vibro-replacement stone pile in collapsible loess area
The invention discloses a construction method of a vibro-replacement stone pile in a collapsible loess area. The method comprises the steps that 1, construction preparation is conducted; 2, a samplinghole is drilled in the pile position, the height of the sampling hole is consistent with that of a pile hole, and determining the diameter and the compactness of gravel needing to be put into each soil layer, the descending speed and the vibration time of vibroflotation equipment in each soil layer, the water pressure of water outlet of a water injection hole and the air pressure of air injectionof an air injection hole according to the water content, the density, the soil particle specific gravity and the collapse coefficient of each soil layer; 3, a water injection hole is drilled in the position of the sampling hole; 4, parameters are determined; 5, hole forming is conducted; 6, vibro-replacement equipment conducts hole forming to reach the set depth, broken stone evenly falls into the pile hole through a discharging port, the vibro-replacement equipment fills the pile hole with the broken stone, meanwhile, high-pressure cement paste is sprayed through a paste spraying nozzle, andthe cement paste is diffused to the periphery into broken stone gaps; 7, the step 6 is repeated till filler in the whole pile hole is compact; and 8, whether the quality of a pile body meets the design requirement or not is detected. According to the construction method, the arrangement manner of soil body particles is changed, the bearing capacity of a collapsible soil body is greatly improved,and the settling volume is reduced.
本发明公开了一种湿陷性黄土地区振冲碎石桩的施工方法，所述方法包括：步骤一：施工准备；步骤二：在所述桩位钻出取样孔，取样孔的高度与桩孔高度一致，根据各土层的含水率、密度、土粒比重和湿陷系数；步骤三：在所述取样孔的位置上钻出注水孔；步骤四：确定参数；步骤五：造孔：步骤六：振冲设备造孔达到设定深度，碎石通过出料口均匀落入桩孔中，振冲设备将桩孔填充碎石，同时通过喷浆嘴喷喷射高压水泥浆，水泥浆向四周扩散至碎石缝隙中；步骤七，重复步骤六，直至整个桩孔中填料密实；步骤八，检测桩身的质量是否达到设计要求。本发明改变了土体颗粒的排列方式，极大提高了湿陷性土体的承载力以及降低了沉降量。
Construction method of vibro-replacement stone pile in collapsible loess area
The invention discloses a construction method of a vibro-replacement stone pile in a collapsible loess area. The method comprises the steps that 1, construction preparation is conducted; 2, a samplinghole is drilled in the pile position, the height of the sampling hole is consistent with that of a pile hole, and determining the diameter and the compactness of gravel needing to be put into each soil layer, the descending speed and the vibration time of vibroflotation equipment in each soil layer, the water pressure of water outlet of a water injection hole and the air pressure of air injectionof an air injection hole according to the water content, the density, the soil particle specific gravity and the collapse coefficient of each soil layer; 3, a water injection hole is drilled in the position of the sampling hole; 4, parameters are determined; 5, hole forming is conducted; 6, vibro-replacement equipment conducts hole forming to reach the set depth, broken stone evenly falls into the pile hole through a discharging port, the vibro-replacement equipment fills the pile hole with the broken stone, meanwhile, high-pressure cement paste is sprayed through a paste spraying nozzle, andthe cement paste is diffused to the periphery into broken stone gaps; 7, the step 6 is repeated till filler in the whole pile hole is compact; and 8, whether the quality of a pile body meets the design requirement or not is detected. According to the construction method, the arrangement manner of soil body particles is changed, the bearing capacity of a collapsible soil body is greatly improved,and the settling volume is reduced.
本发明公开了一种湿陷性黄土地区振冲碎石桩的施工方法，所述方法包括：步骤一：施工准备；步骤二：在所述桩位钻出取样孔，取样孔的高度与桩孔高度一致，根据各土层的含水率、密度、土粒比重和湿陷系数；步骤三：在所述取样孔的位置上钻出注水孔；步骤四：确定参数；步骤五：造孔：步骤六：振冲设备造孔达到设定深度，碎石通过出料口均匀落入桩孔中，振冲设备将桩孔填充碎石，同时通过喷浆嘴喷喷射高压水泥浆，水泥浆向四周扩散至碎石缝隙中；步骤七，重复步骤六，直至整个桩孔中填料密实；步骤八，检测桩身的质量是否达到设计要求。本发明改变了土体颗粒的排列方式，极大提高了湿陷性土体的承载力以及降低了沉降量。
Construction method of vibro-replacement stone pile in collapsible loess area
湿陷性黄土地区振冲碎石桩的施工方法
QU YOULAI (Autor:in) / YAO XINSHUN (Autor:in) / HAN LIANG (Autor:in) / LI YONGWEI (Autor:in) / WANG SIRUI (Autor:in) / LI ZONGWEI (Autor:in) / ZHAO HANZHANG (Autor:in)
09.02.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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