Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method for expanded-base cast-in-place pile in water-rich gravel bed
The invention relates to a construction method for a bottom-expanded cast-in-place pile of a water-rich gravel layer. According to the technical scheme, the construction method is characterized by comprising the following steps that S1, the ground is leveled, and a drilling machine is installed; s2, a pile casing is installed; step S3, drilling holes; step S4, hole cleaning; s5, detecting and repairing the hole by using a hole detector; s6, a circumferential grouting pipe with a grouting valve is installed on the reinforcement cage, and then the reinforcement cage is installed in the pile hole; s7, grouting is conducted, specifically, grouting is conducted in the center of the reinforcement cage through a center grouting pipe; when grouting reaches the designed elevation of the bottom-expanded cast-in-place pile, high-pressure concrete slurry is pumped into the circumferential grouting pipes, and the circumferential grouting pipes and the central grouting pipe work together; when the grouting height is 1-1.5 m higher than the designed elevation of the expanded-base cast-in-place pile, concrete grouting is stopped; the expanded-base cast-in-place pile constructed in the geological environment of the water-rich gravel bed has better pile side friction force and pile end pulling resistance, and therefore the expanded-base cast-in-place pile has better bearing capacity.
本发明涉及一种富水砂砾层扩底灌注桩施工方法，其技术方案的要点是包括以下方法步骤：步骤S1,地面整平和钻机安装；步骤S2,护筒安装；步骤S3,钻孔；步骤S4,清孔；步骤S5,探孔器检测修孔；步骤S6,在钢筋笼安装带有注浆阀的周向注浆管，然后将钢筋笼安装到桩孔中；步骤S7,注浆，在钢筋笼中心采用中心灌浆管进行灌浆；在灌浆至扩底灌注桩设计标高时，向周向注浆管内泵入高压混凝土泥浆，周向注浆管和中心灌浆管一同作业；注浆高度高于扩底灌注桩设计标高1‑1.5米时，停止混凝土注浆；本发明在富水砂砾层地质环境中施工的扩底灌注桩具有更加良好的桩侧摩檫力和桩端抗拔力，进而使扩底灌注桩具有更加良好的承载能力。
Construction method for expanded-base cast-in-place pile in water-rich gravel bed
The invention relates to a construction method for a bottom-expanded cast-in-place pile of a water-rich gravel layer. According to the technical scheme, the construction method is characterized by comprising the following steps that S1, the ground is leveled, and a drilling machine is installed; s2, a pile casing is installed; step S3, drilling holes; step S4, hole cleaning; s5, detecting and repairing the hole by using a hole detector; s6, a circumferential grouting pipe with a grouting valve is installed on the reinforcement cage, and then the reinforcement cage is installed in the pile hole; s7, grouting is conducted, specifically, grouting is conducted in the center of the reinforcement cage through a center grouting pipe; when grouting reaches the designed elevation of the bottom-expanded cast-in-place pile, high-pressure concrete slurry is pumped into the circumferential grouting pipes, and the circumferential grouting pipes and the central grouting pipe work together; when the grouting height is 1-1.5 m higher than the designed elevation of the expanded-base cast-in-place pile, concrete grouting is stopped; the expanded-base cast-in-place pile constructed in the geological environment of the water-rich gravel bed has better pile side friction force and pile end pulling resistance, and therefore the expanded-base cast-in-place pile has better bearing capacity.
本发明涉及一种富水砂砾层扩底灌注桩施工方法，其技术方案的要点是包括以下方法步骤：步骤S1,地面整平和钻机安装；步骤S2,护筒安装；步骤S3,钻孔；步骤S4,清孔；步骤S5,探孔器检测修孔；步骤S6,在钢筋笼安装带有注浆阀的周向注浆管，然后将钢筋笼安装到桩孔中；步骤S7,注浆，在钢筋笼中心采用中心灌浆管进行灌浆；在灌浆至扩底灌注桩设计标高时，向周向注浆管内泵入高压混凝土泥浆，周向注浆管和中心灌浆管一同作业；注浆高度高于扩底灌注桩设计标高1‑1.5米时，停止混凝土注浆；本发明在富水砂砾层地质环境中施工的扩底灌注桩具有更加良好的桩侧摩檫力和桩端抗拔力，进而使扩底灌注桩具有更加良好的承载能力。
Construction method for expanded-base cast-in-place pile in water-rich gravel bed
一种富水砂砾层扩底灌注桩施工方法
XIAO XIAN (Autor:in) / ZHAO PENG (Autor:in) / LIU JINMING (Autor:in) / ZHU CHUANXU (Autor:in) / WANG WENZHAO (Autor:in) / ZHAO FULONG (Autor:in) / WANG TONG (Autor:in)
28.04.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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