Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cast-in-place pile hole-forming construction structure for complex stratum
The invention relates to the technical field of cast-in-place pile hole forming, and discloses a cast-in-place pile hole forming construction structure for a complex stratum. Comprising the steps that a pump suction reverse circulation drilling machine is used for being provided with a cone hob bit to drill an upper section hole in a rock-fill layer, a middle section hole is formed below the upper section hole, a rotary drilling rig is used for drilling a lower section hole in a soil layer and a bottom section hole is formed in a hard rock layer, the bottom of the upper section hole is located above a sludge layer, and the top of the middle section hole is arranged in the rock-fill layer; an outer protection cylinder is arranged in the upper section hole and abuts against the inner side wall of the upper section hole, an inner protection cylinder is arranged in the middle section hole, the lower portion of the inner protection cylinder abuts against the inner side wall of the middle section hole, the upper portion of the inner protection cylinder is arranged in the upper section hole in a penetrating mode, and a protection cylinder gap is formed between the inner protection cylinder and the outer protection cylinder. According to the cast-in-place pile hole-forming construction structure for the complex stratum, the problem of pulling out the steel casing is solved, hole collapse and necking of a silt layer are avoided, hole collapse in later construction is avoided, the drilling speed in a stone filling layer and the silt layer is higher, the construction period is shortened, the construction speed is high, and the construction period is shortened.
本发明涉及灌注桩成孔的技术领域，公开了用于复杂地层的灌注桩成孔施工结构，包括采用泵吸反循环钻机配置牙轮滚刀钻头钻进在填石层中的上段孔、形成在上段孔下方的中段孔、采用旋挖钻机钻进在土层中的下段孔以及形成在硬岩层中的底段孔，上段孔的底部位于淤泥层的上方，中段孔的顶部置于填石层中；上段孔中设有外护筒，外护筒抵接上段孔的内侧壁，中段孔中设有内护筒，内护筒的下部抵接中段孔的内侧壁，内护筒的上部穿设在上段孔中，与外护筒之间具有护筒间隙；用于复杂地层的灌注桩成孔施工结构解决了起拔钢护筒的难题，避免淤泥层的塌孔、缩颈，避免后期施工塌孔，在填石层和淤泥层钻进速度更快，加快了工期，施工速度快，缩短了工期。
Cast-in-place pile hole-forming construction structure for complex stratum
The invention relates to the technical field of cast-in-place pile hole forming, and discloses a cast-in-place pile hole forming construction structure for a complex stratum. Comprising the steps that a pump suction reverse circulation drilling machine is used for being provided with a cone hob bit to drill an upper section hole in a rock-fill layer, a middle section hole is formed below the upper section hole, a rotary drilling rig is used for drilling a lower section hole in a soil layer and a bottom section hole is formed in a hard rock layer, the bottom of the upper section hole is located above a sludge layer, and the top of the middle section hole is arranged in the rock-fill layer; an outer protection cylinder is arranged in the upper section hole and abuts against the inner side wall of the upper section hole, an inner protection cylinder is arranged in the middle section hole, the lower portion of the inner protection cylinder abuts against the inner side wall of the middle section hole, the upper portion of the inner protection cylinder is arranged in the upper section hole in a penetrating mode, and a protection cylinder gap is formed between the inner protection cylinder and the outer protection cylinder. According to the cast-in-place pile hole-forming construction structure for the complex stratum, the problem of pulling out the steel casing is solved, hole collapse and necking of a silt layer are avoided, hole collapse in later construction is avoided, the drilling speed in a stone filling layer and the silt layer is higher, the construction period is shortened, the construction speed is high, and the construction period is shortened.
本发明涉及灌注桩成孔的技术领域，公开了用于复杂地层的灌注桩成孔施工结构，包括采用泵吸反循环钻机配置牙轮滚刀钻头钻进在填石层中的上段孔、形成在上段孔下方的中段孔、采用旋挖钻机钻进在土层中的下段孔以及形成在硬岩层中的底段孔，上段孔的底部位于淤泥层的上方，中段孔的顶部置于填石层中；上段孔中设有外护筒，外护筒抵接上段孔的内侧壁，中段孔中设有内护筒，内护筒的下部抵接中段孔的内侧壁，内护筒的上部穿设在上段孔中，与外护筒之间具有护筒间隙；用于复杂地层的灌注桩成孔施工结构解决了起拔钢护筒的难题，避免淤泥层的塌孔、缩颈，避免后期施工塌孔，在填石层和淤泥层钻进速度更快，加快了工期，施工速度快，缩短了工期。
Cast-in-place pile hole-forming construction structure for complex stratum
用于复杂地层的灌注桩成孔施工结构
HATA SHOGO (Autor:in) / ZHANG LINGSHUAI (Autor:in) / QIAO SHUANGSHUANG (Autor:in) / YAO JINGYU (Autor:in)
14.06.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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