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Combined pile foundation equipment for rapid hole formation in complex geology

A technology of complex geology and combined equipment, which is applied to drilling equipment, driving devices for combined rotary drilling, and earthwork drilling and production, and can solve problems such as low drilling efficiency, high frictional resistance, and inability to pull out from the hole. The effect of increasing drilling rate and reducing friction

Pending Publication Date: 2020-04-17
SHENZHEN SOFORE GEOTECHNICAL ENG CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0004] However, if the pile length is too long (such as exceeding 40 meters), the depth of the borehole will also increase accordingly, so that the side friction resistance between the steel casing and the hole wall will be too large when the steel casing is drilled downward. , so that the pipe rubbing machine does not move, and it is easy to get stuck so that the rigid casing cannot be pulled out from the hole. When there is a boulder, after drilling through the rock formation with the rotary excavator, it is necessary to use the reaming drill for secondary drilling. The casing can only be lowered after the first reaming, which is time-consuming and the drilling efficiency is low

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  • Combined pile foundation equipment for rapid hole formation in complex geology
  • Combined pile foundation equipment for rapid hole formation in complex geology
  • Combined pile foundation equipment for rapid hole formation in complex geology

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Embodiment Construction

[0031] The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions. The various technical features in the invention can be combined interactively on the premise of not conflictin...

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Abstract

The invention relates to the technical field of construction equipment for building foundation engineering, in particular to combined pile foundation equipment for rapid hole formation in complex geology. The combined pile foundation equipment comprises a cylinder body which is formed by sequentially splicing a plurality of sections of protection cylinders and internally and fixedly provided witha fixed disc, a connecting cylinder arranged on the cylinder body and rotatably connected with the cylinder body, a hydraulic vibration hammer arranged at the top of the connecting cylinder, arotary excavating machineused for driving the fixed disc to rotate and a plurality of drill bits circumferentially arranged along the bottom of the cylinder body, wherein the diameter of circumscribed circlesof parallel projections of the multiple drill bits on the horizontal plane is larger than the outer diameter of the cylinder body. The combined pile foundation equipment has the advantages of reducing the side friction force between a steel protection cylinder and ahole wall and improving the drilling efficiency, and the problem of wall protection is solved.

Description

technical field [0001] The invention relates to the technical field of building foundation engineering construction equipment, in particular to a pile foundation combination equipment used for rapid hole formation in complex geology. Background technique [0002] Bored cast-in-situ pile refers to the pile hole formed in the foundation soil by means of mechanical drilling, steel pipe extrusion or manual excavation on the project site, and a steel cage is placed in it and concrete is poured into it. [0003] At present, when drilling complex strata, such as strata containing miscellaneous fills, sandy pebbles, boulders and boulders, the common method is to use a steel casing and a pipe twister to cooperate, and the rotary excavator will first drill the hole. Excavate the slag, and then the pipe rubbing machine drives the steel casing to follow up at any time to prevent the hole wall or hole from collapsing during the drilling process. [0004] However, if the pile length is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B6/00E21B17/00E21B17/04E21B17/046E21B10/00
CPCE21B6/00E21B17/00E21B17/04E21B17/046E21B10/00
Inventor 刘东轩张国
Owner SHENZHEN SOFORE GEOTECHNICAL ENG CO LTD
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