Anti-piping device for a full pile casing of a full slewing drilling machine

A technology of full rotary drilling rig and full casing, which is used in rotary drilling rigs, rotary drilling, drilling tools, etc., to achieve the effects of simple installation, great market promotion value, and reliable principle

Active Publication Date: 2021-04-20
CHINA FIRST METALLURGICAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention proposes a full-casing anti-piping device for an azimuth drilling rig, aiming to solve the existing problems

Method used

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  • Anti-piping device for a full pile casing of a full slewing drilling machine
  • Anti-piping device for a full pile casing of a full slewing drilling machine
  • Anti-piping device for a full pile casing of a full slewing drilling machine

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Embodiment Construction

[0020] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0021] see Figure 1 to Figure 3 , which shows the preferred structure of the anti-piping device for the full casing of the azimuth drilling rig provided by ...

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Abstract

The invention provides an anti-piping device for a full pile casing of a full slewing drilling machine. The anti-piping device comprises the pile casing, wherein a plurality of pile casing water permeable holes are formed in the middle of the pile casing in the circumferential direction of the pile casing, and a water-permeable soil-isolating layer is arranged at the periphery of the pile casing at the position where the pile casing water-permeable holes are formed. According to the anti-piping device, by means of the pile casing water permeable holes in the pile casing, underground water around the pile casing enters the pile casing from the pile casing water permeable holes, and then the piping phenomenon caused by sandy soil particles flowing into the pile casing due to the fact that the underground water enters the pile casing from the bottom of the pile casing is avoided; and the water-permeable soil-isolating layer is arranged on the periphery of the water-permeable holes of the pile casing to form a water-permeable and soil-isolating system, so that underground water enters the pile casing from the water-permeable and soil-isolating system in the soil sampling process, and piping and quicksand phenomena caused by the fact that the underground water enters the pile casing from the bottom of the pile casing are avoided, it is guaranteed that water around the pile casing enters the pile casing along the pile casing water permeable holes, meanwhile, sandy soil particles are prevented from entering the pile casing, and then the purpose of sandy soil particle loss is achieved.

Description

technical field [0001] The invention relates to the technical field of municipal engineering, in particular to an anti-piping device for a full-casing of a fully-rotary drilling rig. Background technique [0002] In the construction of urban bridges, new bridges inevitably intersect with subways and tunnels. At the same time, due to the high requirements of subways and tunnels on the deformation of surrounding soil, traditional bored piles and other pile foundations that disturb the ground and have a lot of noise Construction methods have been unable to meet the requirements. Therefore, for this kind of working conditions, full-casing full-rotary drilling rigs are often used for construction. [0003] The construction of the full-rotary drilling rig has the characteristics of small disturbance to the soil layer and small deformation, but for complex working conditions such as thick sandy soil layers and high water levels, piping is prone to occur during the soil extraction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B12/00E21B12/04E21B3/02E21B10/43
Inventor 雷自力王天翔
Owner CHINA FIRST METALLURGICAL GROUP
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