Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method for composite foundation covered with hillstone layer and underlying soft soil vibro-replacement gravel pile
The invention discloses a construction method of a composite foundation with an overlying hillstone layer and an underlying soft soil vibro-replacement gravel pile, which comprises the following steps: filling hillstone on a seabed sludge layer to form an overlying deep hillstone foundation; a pile position is determined in a target area of the overlying deep hillstone foundation, a rotary drilling rig is used for burying a pile casing to the preset depth of the pile position, and the bottom end of the pile casing needs to exceed the overlying deep hillstone foundation to enter a silt layer; then vibro-replacement gravel piles are constructed on the silt layer section by section till the bottom of the pile casing; and then, the pile casing is pulled out, and vibro-replacement gravel piles are constructed in the overlying deep and thick rock foundation section by section from bottom to top till the ground. According to the method, the pile casing is embedded in the overlying rock stratum by adopting the rotary drilling guide hole, the construction process is simple and convenient, the cost is low, and the quality is controllable. The vibro-replacement gravel piles are constructed in two sections, the feeding mode of the silt layer gravel piles is controllable, and the pile forming quality is controllable.
本发明公开了一种上覆开山石层下卧软土振冲碎石桩复合地基施工方法，在海床淤泥层之上填覆开山石，形成上覆深厚开山石地基；在上覆深厚开山石地基目标区域确定桩位，利用旋挖钻机将护筒埋设到桩位处预定深度，使护筒的底端要超过上覆深厚开山石地基进入淤泥层；然后在淤泥层逐段施工振冲碎石桩，直至护筒底；之后，拔出护筒，自下而上逐段在上覆深厚开山石地基中构造振冲碎石桩，直至地面。本发明采用在上覆开山石地层采用旋挖钻引孔埋设护筒，施工工艺简便，成本较低，质量可控。本发明分两段分别施工振冲碎石桩，淤泥层碎石桩送料方式可控，成桩质量可控。
Construction method for composite foundation covered with hillstone layer and underlying soft soil vibro-replacement gravel pile
The invention discloses a construction method of a composite foundation with an overlying hillstone layer and an underlying soft soil vibro-replacement gravel pile, which comprises the following steps: filling hillstone on a seabed sludge layer to form an overlying deep hillstone foundation; a pile position is determined in a target area of the overlying deep hillstone foundation, a rotary drilling rig is used for burying a pile casing to the preset depth of the pile position, and the bottom end of the pile casing needs to exceed the overlying deep hillstone foundation to enter a silt layer; then vibro-replacement gravel piles are constructed on the silt layer section by section till the bottom of the pile casing; and then, the pile casing is pulled out, and vibro-replacement gravel piles are constructed in the overlying deep and thick rock foundation section by section from bottom to top till the ground. According to the method, the pile casing is embedded in the overlying rock stratum by adopting the rotary drilling guide hole, the construction process is simple and convenient, the cost is low, and the quality is controllable. The vibro-replacement gravel piles are constructed in two sections, the feeding mode of the silt layer gravel piles is controllable, and the pile forming quality is controllable.
本发明公开了一种上覆开山石层下卧软土振冲碎石桩复合地基施工方法，在海床淤泥层之上填覆开山石，形成上覆深厚开山石地基；在上覆深厚开山石地基目标区域确定桩位，利用旋挖钻机将护筒埋设到桩位处预定深度，使护筒的底端要超过上覆深厚开山石地基进入淤泥层；然后在淤泥层逐段施工振冲碎石桩，直至护筒底；之后，拔出护筒，自下而上逐段在上覆深厚开山石地基中构造振冲碎石桩，直至地面。本发明采用在上覆开山石地层采用旋挖钻引孔埋设护筒，施工工艺简便，成本较低，质量可控。本发明分两段分别施工振冲碎石桩，淤泥层碎石桩送料方式可控，成桩质量可控。
Construction method for composite foundation covered with hillstone layer and underlying soft soil vibro-replacement gravel pile
一种上覆开山石层下卧软土振冲碎石桩复合地基施工方法
ZHANG RUIQI (Autor:in)
23.06.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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