Cast-in-situ bored pile pile-foundation combination pile casing for percussion drilling tool

A technology for bored piles and percussion drills, which is applied to sheet pile walls, infrastructure engineering, construction, etc., can solve problems such as scrapping of bored piles, and achieve the effects of simple structure, convenient operation, and reduction of scrapping rate.

Active Publication Date: 2014-01-15
CHINA RAILWAY 19 BUREAU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a combined casing of bored cast-in-place pile foundation for percussion drilling, which solves the problem that the bored-in-

Method used

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  • Cast-in-situ bored pile pile-foundation combination pile casing for percussion drilling tool
  • Cast-in-situ bored pile pile-foundation combination pile casing for percussion drilling tool

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[0010] The present invention will be described in detail below in conjunction with the drawings:

[0011] A combined protective tube for percussion drilling bored pile pile foundation includes a protective tube base pit set on the ground 1, a protective tube 2 arranged in the protective tube base pit, and a protective tube 2 The pile foundation hole 3 is set directly below the pile foundation hole 3, and the reinforcement cage 4 is set in the pile foundation hole 3. The bottom end of the grouting pipe 5 is sequentially set at the bottom of the pile foundation hole 3 through the casing 2 and the reinforcement cage 4, and the concrete 6 is poured into the bottom of the pile foundation hole 3 through a grouting pipe 5. A ring-shaped cap 9 on the top of the protective tube is provided on the top of the protective tube body 2, and the outer circle of the annular cap 9 on the top of the protective tube is respectively arranged at equal intervals. Three horizontal radial support rods 10...

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Abstract

The invention discloses a cast-in-situ bored pile pile-foundation combination pile casing for a percussion drilling tool. The problem that a cast-in-situ bored pile is scrapped due to the fact that a steel reinforcement cage floats upwards when a pile foundation of the cast-in-situ bored pile is constructed through an existing percussion drilling tool is solved. The cast-in-situ bored pile pile-foundation combination pile casing is characterized in that a pile casing body (2) is arranged in a pile casing body foundation ditch, a pile foundation hole (3) and the steel reinforcement cage (4) are arranged right below the pile casing body (2), a pile casing top annular cover (9) is arranged at the top of the pile casing body (2), three horizontally-radiated-type supporting rods (10) are respectively arranged on the outer circle of the pile casing top annular cover (9) at an equal radian interval, a balance weight tray (12) is arranged at the outer end of each horizontally-radiated-type supporting rod (10), a balance weight iron block (14) is arranged in each balance weight tray (12), and horizontal adjustment cushion blocks (13) are arranged between the ground (1) and the balance weight trays (12). According to the cast-in-situ bored pile pile-foundation combination pile casing, the scrapped rate of the cast-in-situ bored pile is reduced, the structure is simple, and operation is conveniently achieved.

Description

Technical field [0001] The invention relates to a pile foundation construction equipment, in particular to a casing for percussion drill construction of bored piles. Background technique [0002] When percussion drills are used to construct the pile foundation of bored piles, due to the vibration generated by the impact of the drill hammer and the unevenness of the embedment of the protective tube itself, the protective tube of the cast-in-place pile will often be tilted, and the inclination of the protective tube will cause the hole of the bored pile . Especially after the pile foundation is drilled, during the process of pouring concrete, due to the impact and buoyancy of the concrete lowering, the steel cage will often float upward, which directly causes the position of the steel cage to be inconsistent with the design. In the prior art, when overcoming the inclination of the protective tube, a level is used to periodically measure the level of the protective tube of the cast...

Claims

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Application Information

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IPC IPC(8): E02D5/66E02D5/38
Inventor 朱斌马南飞
Owner CHINA RAILWAY 19 BUREAU GRP CO LTD
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