CN204401611U - The pile making device of concrete pile - Google Patents

Abstract

The utility model provides a pile-forming device for concrete piles, which can quickly complete the construction of pile body hole formation and pressure pouring concrete at one time, and make full use of the original soil to increase the frictional resistance of the pile side, so as to simplify the process, improve work efficiency and reduce costs. Purpose. The technical solution adopted by the utility model is: a pile-forming device for concrete piles, including a drill rod and a drill bit, characterized in that: the outer wall of the drill bit is provided with a certain length of drilling helical piece, and the outer diameter of the drilling helical piece is determined by It is tapered from top to bottom, and there is a certain length of reverse soil extrusion spiral above the drilling spiral. The outer diameter of the reverse soil extrusion spiral is greater than or equal to the maximum outer diameter of the drilling spiral. The inside of the drill is a hollow pipe that can transport concrete, and the hollow pipe communicates with the discharge port arranged at the bottom of the drill bit.

Description

Concrete pile forming device

technical field

The utility model relates to the field of civil engineering, in particular to pile construction.

Background technique

Among the current foundation treatment methods in our country, it is a commonly used method to form holes and make concrete piles by using the method of screw-guided holes. During the process of drilling, the soil in the pile hole is discharged to the outside of the ground, that is, the original soil is not well utilized, and additional labor and machinery are required to clean and transport the discharged soil, resulting in reduced work efficiency and increased costs.

Contents of the invention

In order to overcome the defects and insufficiencies of the prior art, the utility model provides a pile-forming device for concrete piles, which can quickly complete the construction of pile body hole formation and pressure pouring concrete at one time, and make full use of the original soil to increase the pile side frictional resistance. To achieve the purpose of simplifying the process, improving work efficiency and reducing costs.

The technical scheme adopted by the utility model to solve the technical problem is: a pile-forming device for concrete piles, including a drill pipe and a drill bit, characterized in that: the outer wall of the drill bit is provided with a certain length of drilling spiral, and The outer diameter of the drill is tapered from top to bottom, and there is a certain length of reverse soil squeezing screw above the drilling screw. The outer diameter of the reverse squeezing screw is greater than or equal to the maximum outer diameter of the drilling screw. diameter, the inside of the drill pipe is a hollow pipe that can transport concrete, and the hollow pipe communicates with the discharge port arranged at the bottom of the drill bit.

Preferably, in the above-mentioned piling device for concrete piles, the helix angle of the above-mentioned drilling auger is inclined downward. Spiral piece drills out upwards.

Preferably, in the above-mentioned pile-forming device for concrete piles, the helix angle of the above-mentioned reverse soil-squeezing helix is inclined upward, and when the drilling helix cuts the soil body and drills downward, the reverse-squeeze soil helix presses down on the soil And squeeze the soil into the hole wall.

The beneficial effects of the utility model are as follows: ① multiple processes such as drilling into holes and concrete pouring can be completed at one time, and it has the characteristics of simple structure, continuous operation and high work efficiency; ② no soil is discharged or taken during the whole construction process , all the original soil in the pile hole is squeezed into the hole wall, which avoids the process of clearing and transporting the soil, and significantly improves the side friction resistance of the pile body and the bearing capacity of the soil between the piles.

Description of drawings

Fig. 1 is the schematic diagram of pile-forming device of the present utility model, and among Fig. 1, 1 is drill pipe, and 2 is drill bit, and 3 is to drill into helicoid, and 4 is reverse extruding soil helical, and 5 is discharge port.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the piling device includes a drill pipe 1 and a drill bit 2, the outer wall of the drill bit 1 is provided with a certain length of drilling helical piece 3, and the outer diameter of the drilling helical piece 3 is tapered from top to bottom. The top of the drilling screw 3 is provided with a certain length of reverse soil squeezing screw 4, the outer diameter of the reverse squeezing soil screw 4 is greater than or equal to the maximum outer diameter of the drilling screw 3, and the inside of the drill pipe 1 can be The hollow pipe for transporting concrete communicates with the discharge port 5 arranged at the bottom of the drill bit 2 .

Claims (3)

1. the pile making device of a concrete pile, include drilling rod and drill bit, it is characterized in that: what drill bit outer wall was provided with certain length creeps into flight, the external diameter creeping into flight successively decreases from top to bottom in sharp cone distal, the top of creeping into flight is provided with the reverse soil compaction flight of certain length, the external diameter of reverse soil compaction flight is greater than or equal to the maximum outside diameter creeping into flight, and the inside of drilling rod is can the hollow pipeline of delivering concrete, and hollow pipeline is connected with the discharging opening of the bottom being arranged at drill bit.

2. the pile making device of concrete pile according to claim 1, is characterized in that: the spiral angle creeping into flight is tilted to down, creeps into the flight cutting soil body and creeps into downwards, creep into flight and upwards get out during reversion drilling rod when rotating forward drilling rod.

3. the pile making device of concrete pile according to claim 1, is characterized in that: oppositely the spiral angle of soil compaction flight tilts upward, and creep into flight and cut the soil body when creeping into downwards, reverse soil compaction flight presses down the soil body and is squeezed in hole wall by the soil body.