Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Double-casing-pipe double-drive full-rotation type pile forming device and technology
The invention discloses a double-casing-pipe double-drive full-rotation type pile forming device. A double-casing-pipe double-drive full-rotation drilling machine, an upper clamp sheet, a lower clampsheet, an outer casing pipe, an inner casing pipe and a steel bar cage are included. The lower clamp sheet and the outer casing pipe are connected together, the outer casing pipe can be downwards pressed to penetrate through a refilling layer through forward rotation, and the outer casing pipe can be pulled out of the refilling layer through reverse rotation. The upper clamp sheet and the inner casing pipe are connected together, the inner casing pipe can be downwards pressed to penetrate through strong weathered rock and a karst cave to enter a bearing stratum moderately-weathered limestone layer through forward rotation, and the inner casing pipe can be pulled out through reverse rotation. The steel bar cage is arranged at the middle positions of the outer casing pipe and the inner casing pipe, a concrete guide pipe is arranged at the middle position of the steel bar cage and can be lowered and hoisted along the center position of the steel bar cage, and a funnel is fixedly connectedto the upper end of the concrete guide pipe. By means of the double-casing-pipe double-drive full-rotation type pile forming device, the ultra-long pile construction depth can be achieved, the hole forming efficiency can be greatly improved, the hole forming depth can reach 120 m, and the problems that in deep refilling layer karst development areas and other complex stratums, the pile length islimited, and the pile forming efficiency is too low are solved.
本发明公开了一种双套管双驱动全回转式成桩装置，包括双套管双驱动全回转钻机、上夹片、下夹片、外套管、内套管和钢筋笼，下夹片与外套管连接在一起，正向旋转可以下压外套管穿过回填层，反向旋转可以将外套管从回填层中拔出，上夹片与内套管连接在一起，正向旋转可以下压内套管穿过强风化岩、溶洞进入持力层中风化灰岩层，反向旋转可以将内套管拔出，钢筋笼放置在外套管和内套管的中间位置，钢筋笼的中间位置设置有混凝土导管，可以沿钢筋笼中心位置下放和起吊，混凝土导管的上端固定连接有漏斗。本发明能够满足超长桩施工深度，可大幅度提高成孔效率，成孔深度可达120m，解决了在深回填层岩溶发育区等复杂地层，桩长受限及成桩效率过低的难题。
Double-casing-pipe double-drive full-rotation type pile forming device and technology
The invention discloses a double-casing-pipe double-drive full-rotation type pile forming device. A double-casing-pipe double-drive full-rotation drilling machine, an upper clamp sheet, a lower clampsheet, an outer casing pipe, an inner casing pipe and a steel bar cage are included. The lower clamp sheet and the outer casing pipe are connected together, the outer casing pipe can be downwards pressed to penetrate through a refilling layer through forward rotation, and the outer casing pipe can be pulled out of the refilling layer through reverse rotation. The upper clamp sheet and the inner casing pipe are connected together, the inner casing pipe can be downwards pressed to penetrate through strong weathered rock and a karst cave to enter a bearing stratum moderately-weathered limestone layer through forward rotation, and the inner casing pipe can be pulled out through reverse rotation. The steel bar cage is arranged at the middle positions of the outer casing pipe and the inner casing pipe, a concrete guide pipe is arranged at the middle position of the steel bar cage and can be lowered and hoisted along the center position of the steel bar cage, and a funnel is fixedly connectedto the upper end of the concrete guide pipe. By means of the double-casing-pipe double-drive full-rotation type pile forming device, the ultra-long pile construction depth can be achieved, the hole forming efficiency can be greatly improved, the hole forming depth can reach 120 m, and the problems that in deep refilling layer karst development areas and other complex stratums, the pile length islimited, and the pile forming efficiency is too low are solved.
本发明公开了一种双套管双驱动全回转式成桩装置，包括双套管双驱动全回转钻机、上夹片、下夹片、外套管、内套管和钢筋笼，下夹片与外套管连接在一起，正向旋转可以下压外套管穿过回填层，反向旋转可以将外套管从回填层中拔出，上夹片与内套管连接在一起，正向旋转可以下压内套管穿过强风化岩、溶洞进入持力层中风化灰岩层，反向旋转可以将内套管拔出，钢筋笼放置在外套管和内套管的中间位置，钢筋笼的中间位置设置有混凝土导管，可以沿钢筋笼中心位置下放和起吊，混凝土导管的上端固定连接有漏斗。本发明能够满足超长桩施工深度，可大幅度提高成孔效率，成孔深度可达120m，解决了在深回填层岩溶发育区等复杂地层，桩长受限及成桩效率过低的难题。
Double-casing-pipe double-drive full-rotation type pile forming device and technology
一种双套管双驱动全回转式成桩装置及成桩工艺
LIU JUN'AN (Autor:in) / YANG DAYONG (Autor:in) / YUE JUN (Autor:in) / YANG HUIQI (Autor:in) / LI YUCAI (Autor:in) / YANG HAO (Autor:in) / CAI YAO (Autor:in)
09.10.2020
Patent
Elektronische Ressource
Chinesisch
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