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Drill bit for breaking waste pipe pile, and method for breaking waste pipe pile and pouring new pile

A waste and pipe pile technology, applied in the direction of drill bits, sheet pile walls, drilling equipment, etc., can solve the problems of delay in construction period, high rent, limited length of pile pulling casing, etc., to increase the depth and diameter of piles, and reduce the holding capacity The effect of reducing cost and speeding up construction efficiency

Pending Publication Date: 2018-11-13
中地君豪高科股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The construction process of the prior art has the following defects: first, the length of the pile-extracting casing of the pile-extractor is limited, generally no more than 20 meters, so only pipe piles within a depth of 20 meters can be extracted. Existing pile-extracting equipment is powerless; moreover, for the construction unit, it is not a small cost to equip a set of pile-extracting equipment specially. If it is purchased, the utilization rate is low and it is not cost-effective; It is also necessary to bear the cost of equipment transition, which is not economically cost-effective. Moreover, equipment transition is time-consuming and laborious, and it is easy to delay the construction period; Step by step, the construction efficiency is not high

Method used

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  • Drill bit for breaking waste pipe pile, and method for breaking waste pipe pile and pouring new pile
  • Drill bit for breaking waste pipe pile, and method for breaking waste pipe pile and pouring new pile
  • Drill bit for breaking waste pipe pile, and method for breaking waste pipe pile and pouring new pile

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Embodiment Construction

[0021] As shown in the figure, the drill bit for removing waste pipe piles of the present invention includes a mandrel 1 with a helical blade 2 on the outer circumference of the mandrel 1 and a connecting part 3 for docking with the drill pipe of the drilling rig at the top of the mandrel 1 . The helical blade 2 is provided with a plurality of picks 4 at least below the middle, and of course, the helical blade 2 may also be provided with picks 4 from top to bottom. And, even, can replace pick 4 with gear teeth, to obtain better rock-breaking effect.

[0022] The bottom of the mandrel 1 is provided with a vertical tendon 5 welded by a plurality of short steel bars, the tendon 5 is coaxial with the mandrel 1 and the outer diameter of the tendon 5 is less than or equal to the inner diameter of the waste pipe pile to be broken. All the above-mentioned short steel bars are welded together against each other to enhance their strength and supporting performance.

[0023] Specificall...

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PUM

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Abstract

The invention discloses a drill bit for breaking a waste pipe pile, and a method for breaking the waste pipe pile and pouring a new pile. The drill bit comprises a core shaft, spiral blades are arranged at the external circumference of the core shaft, and a connecting part in butt joint with a drill pipe of a drill jig is arranged at the top of the core shaft. A plurality of cutting teeth are formed at least below the middle of the spiral blades, a vertical steel bar bundle formed by a plurality of short steel bars in a welded mode is arranged at the bottom of the core shaft, the steel bar bundle is coaxial with the core shaft, and the outer diameter of the steel bar bundle is less than or equal to the inner diameter of the to-be-crushed waste pipe pile. The key of the method is that the two steps of waste pile crushing and new pile hole forming are integrated and conducted synchronously. According to the drill bit and the method, the waste pipe pile with the depth exceeding 20 meterscan be effectively broken, and waste pile breaking and new pile hole forming can be conducted synchronously, so that the construction efficiency is improved, and the construction cost is lowered.

Description

technical field [0001] The invention relates to the technical field of building foundation construction, in particular to a drill bit for breaking waste pipe piles and a method for using the drill bit to break waste pipe piles and inject new piles. Background technique [0002] In municipal construction, it is often necessary to demolish low, old and dilapidated buildings, and then build taller and newer buildings on the old foundations. This involves the removal of old piles and the construction of new piles. And what this application is aimed at is the dismantling of waste and old pipe piles. Of course, the pipe piles here should be understood in a broad sense, that is, the piles are hollow inside and the periphery is concrete. It includes hollow circular pipe piles such as high-strength piles. PHC pipe piles also include hollow square piles. [0003] The construction process of the waste pile reconstruction in the prior art is as follows: use a pile puller with a pile p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/44E21B10/42E02D9/00
CPCE21B10/42E21B10/44E02D9/005
Inventor 沈远志黄海达廖峰袁敬袁天顺
Owner 中地君豪高科股份有限公司
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