Soil-squeezing hole expanding pile and construction method and drilling tool thereof

A technology of reaming piles and drilling tools, which is applied in the direction of earthwork drilling, drill bits, drill pipes, etc., can solve the problems that cast-in-situ piles cannot meet the requirements, and achieve the effect of being suitable for mass production and popularization, novel structure and good effect

Active Publication Date: 2016-10-26
凤翔波森特西北岩土工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bearing capacity of cast-in-situ piles used in existing pile foundation construction is mainly composed of pile end soil resistance and pile side soil friction; Pile may not meet the requirements

Method used

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  • Soil-squeezing hole expanding pile and construction method and drilling tool thereof
  • Soil-squeezing hole expanding pile and construction method and drilling tool thereof
  • Soil-squeezing hole expanding pile and construction method and drilling tool thereof

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] Please also see Figure 2 to Figure 4 , the present invention provides a drilling tool 100, comprising a drill pipe 2 with a drill bit 21 and an expanding head 1 sleeved on the drill bit 21.

[0035] The enlarging head 1 includes flaring teeth 11 , an inner cylinder 12 and an outer cylinder 13 sleeved on the inner cylinder 12 , and the inner cylinder 12 and the outer cylinder 13 are arranged at intervals.

[0036] The inner barrel 12 includes a locking portion 121 .

[0037] The outer cylinder 13 includes a limiting portion 131 and an extension opening 133, the number of the limiting portions 131 is two and formed at intervals on the inner peripheral edge of the outer cylinder 13, and the buckle portion 121 is formed on the inner cylinder On the outer peripheral edge of the outer cylinder and clamped between the two limiting parts 131 , the ext...

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Abstract

The invention provides a soil-squeezing hole expanding pile and a construction method and drilling tool thereof. The soil-squeezing hole expanding pile comprises a soil-squeezing part and a hole expanding part located at the bottom of the soil-squeezing part. The soil-squeezing part comprises a pile foundation and a concrete pile body arranged in the pile foundation in a filled mode. The pile foundation comprises a soil-squeezing layer located at the inner periphery of the pile foundation, and an inner thread formed in the inner wall of the soil-squeezing layer. The concrete pile body comprises an outer thread formed in the outer wall of the concrete pile body. The inner thread is in screw confection with the outer thread. A blocking ring structure of the soil-squeezing hole expanding pile conducts secondary squeezing on the hole wall of the squeezing-expanding-formed pile, soil is prevented from being screwed out in the pile forming process, and thus the pile is formed directly through squeezing and expanding. In addition, an expanding head is of a double-layer structure with an inner barrel and an outer barrel, and an expanding tooth is arranged on the inner barrel. Besides, through rotation of the expanding head, out stretching and retracting of the expanding tooth are controlled, and expanding of different soil textures is completed.

Description

【Technical field】 [0001] The invention relates to the field of construction engineering, in particular to a soil-squeezing reaming pile, a construction method of the soil-squeezing reaming pile and a drilling tool thereof. 【Background technique】 [0002] At present, in foundation projects such as construction, water conservancy, and highways, double-helix extruded piles are currently the most commonly used form of pile foundation. The soil that is drilled out of the hole will be squeezed into the side wall of the pile hole, and then the two-way helical closed extrusion drill bit will move upwards and rotate again to squeeze and expand the pile hole. Squeeze into the side wall of the pile hole, and start the concrete pump to press the pile material into the pile hole while the topspin is lifted. The main problem is that the soil is rotary excavated first, then transported upwards and then squeezed to the pile walls on both sides. Therefore, the rotated soil will block the tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/36E21B10/32E21B17/22
CPCE02D5/36E21B10/327E21B17/22
Inventor 刘录怀
Owner 凤翔波森特西北岩土工程有限公司
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