CN205778551U - A soil-extruding pile-forming pile drilling tool - Google Patents

Abstract

The utility model discloses a crowded native stake becomes stake drilling tool, hinder retaining ring, helical cylinder structure and drill bit including sharp linear cylinder structure, muddy earth, the cylinder structure, muddy earth hinder retaining ring and helical cylinder structure rigid coupling in order become integrative drilling tool, helical cylinder structure includes cylinder tube core and clockwise set up the helical blade in cylinder tube core outer fringe, the cylinder tube core is connected with the drill bit through the drill bit joint that its lower extreme set up, it hinders the height ratio of retaining ring and helical cylinder structure to be 7:25 to mix earth, and mixes earth and blocks circle outer wall edge and helical blade outer wall edge and keep flushing. The device has novel structure, good pile forming quality, difficult drilling and environmental protection.

Description

A soil-extruding pile-forming pile drilling tool

technical field

The utility model belongs to the technical field of civil engineering, and in particular relates to a soil-squeezing pile-forming drilling tool.

Background technique

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 transportation path formed by the rotating blades, and it is easy to cause the drilling phenomenon. Moreover, the discharged earth or mud increases the difficulty and progress of pile construction.

The announcement number (CN103556628A), the Chinese patent on the publication date (2014-02-05), discloses a construction method of a spiral vertebral soil extruding pile. Good, high efficiency, but in the actual pile construction process, its overall spiral cone structure will cause the soil in the pile to be unscrewed, and the muck needs to be transported outside, which affects the progress of the construction.

Utility model content

The utility model solves the deficiencies of the prior art, and provides a soil-squeezing pile forming drilling tool, which adds a concrete retaining ring structure to the existing combined drilling tool, and the concrete retaining ring prevents the soil from being unscrewed during the pile forming process. The pile is directly extruded and expanded, which has a novel structure, good pile quality, not easy to hold the drill, and is environmentally friendly.

The technical solution adopted by the utility model is: a pile-forming drilling tool for squeezing soil, including a linear cylindrical structure, a concrete blocking ring, a spiral cylindrical structure and a drill bit, the cylindrical structure, a concrete blocking ring and a drill bit. The spiral cylindrical structure is sequentially fixed into an integrated drilling tool structure. The spiral cylindrical structure includes a cylindrical tube core and a spiral blade arranged clockwise on the outer edge of the cylindrical tube core. The cylindrical tube core is set through its lower end. The drill bit joint is connected with the drill bit, the height ratio of the concrete blocking ring to the spiral cylinder structure is 7:25, and the outer wall edge of the concrete blocking ring is flush with the outer wall edge of the spiral blade.

In a preferred embodiment of the utility model, the concrete retaining ring is a hollow sphere structure with two small ends and a large middle part.

In a preferred embodiment of the utility model, the outer wall of the concrete retaining ring is provided with grooved threads counterclockwise.

In a preferred embodiment of the present invention, the outer wall of the concrete retaining ring is provided with protruding ribs, and the protruding ribs are arranged at equal intervals along the vertical direction of the outer wall of the concrete retaining ring.

Compared with the prior art, the utility model has beneficial effects: 1. The concrete retaining ring structure performs a second extrusion on the hole wall of the extruded and expanded pile, preventing the soil from being directly squeezed out during the pile formation process. The expanded pile has a novel structure, good pile quality, and is not easy to hold back the drill. 2. The soil between the piles has a compaction effect, the pile has a high bearing capacity, does not discharge soil, and saves the amount of concrete. 3. Environmental protection, no mud discharge, no slag transported outside, no construction dust, no soil storage site, and the surrounding environment will not be polluted.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of another embodiment of the concrete retaining ring of the present invention.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

A pile drilling tool for squeezing soil piles, the structure is as shown in Figure 1 and Figure 2, comprising a linear cylindrical structure 1, a concrete retaining ring 2, a spiral cylindrical structure 3 and a drill bit 4, the cylindrical structure 1, The concrete retaining ring 2 and the spiral cylindrical structure 3 are sequentially fixed into an integrated drilling tool structure, and the spiral cylindrical structure 3 includes a cylindrical tube core 31 and a spiral blade 32 arranged clockwise on the outer edge of the cylindrical tube core 31 , the cylinder tube core 31 is connected to the drill bit 4 through the drill joint provided at its lower end, the height ratio of the concrete blocking ring 2 to the spiral cylindrical structure 3 is 7:25, and the outer wall edge of the concrete blocking ring 2 and the The edge of the outer wall of the helical blade 32 remains flush.

In this preferred embodiment, the concrete blocking ring 2 is a hollow sphere structure with a small middle part at both ends, and grooved threads 21 are arranged counterclockwise on the outer wall of the concrete blocking ring 2 , or in the concrete blocking ring 2 The outer wall is provided with raised ribs 22 , and the raised ribs 22 are arranged at equal intervals along the vertical direction of the outer wall of the concrete retaining ring 2 . The functions played by the grooved thread 21 and the protruding edge 22 are equivalent to achieve the same effect. They are all extruding the hole wall of the pile that has been squeezed and expanded for the second time, effectively preventing the pile from being incomplete. It is directly extruded and expanded into piles by being unscrewed.

It should be noted that the outer wall of the concrete retaining ring 2 is not designed with groove threads 21 or raised ribs 22, which can also perform a second extrusion on the hole wall of the extruded and expanded pile, preventing the soil from being squeezed. Unscrew and directly extrude and expand into piles. The outer wall of the concrete retaining ring 2 is provided with groove threads 21 or raised ribs 22, the resulting pile has higher bearing capacity, better pile quality and better construction efficiency.

The height ratio of the concrete blocking ring 2 and the spiral cylindrical structure 3 is preferably 7:25, and the actual size requirements, the height of the concrete blocking ring 2 is 70cm, and the height of the spiral cylindrical structure 3 is 250cm, which can ensure that the The depth of the extruded and expanded pile hole meets the design requirements, and at the same time, it also ensures that the spiral column structure 3 performs a second extrusion on the hole wall of the extruded and expanded pile, preventing the soil from being screwed out and directly extruded and expanded into a pile during the pile formation process. .

A method for constructing a pile of extruded soil,

(1) Hole forming: Drilling tools are provided, and clockwise torque and vertical downward pressure are applied to the drilling tools, the drill bit starts to squeeze and expand to form holes, and the helical blades of the helical cylinder structure directly lower the soil Radial extrusion expansion, at the same time squeeze the hole wall to complete the first reaming, squeeze the hole wall again through the concrete retaining ring to complete the second reaming to form the internal thread of the inner wall of the squeezed soil layer of the pile foundation, in the process of mixing The soil blocking ring blocks the soil body from being rotated out.

(2) Filling while lifting: the clockwise torque and vertical upward pulling force are applied to the drilling tool through the power head of the drilling rig, and the concrete blocking ring squeezes the completed pile hole wall again to prevent the soil from After being rotated out, the drill bit is steadily lifted to the surface, and the concrete pump is started during the lifting process of the drill bit. The concrete passes through the hollow drill pipe and the drill bit door to pour the pile foundation to form a concrete pile body with external threads on the outer wall.

The utility model adds a concrete blocking ring structure to the existing combined drilling tool, and the concrete blocking ring performs a second extrusion on the hole wall of the extruded and expanded pile, preventing the soil from being directly squeezed out during the pile forming process. The expanded pile has a novel structure, good pile quality, and is not easy to hold back the drill. The soil between the piles has a compaction effect, the pile bearing capacity is high, and the surrounding environment will not be polluted.

The above-described embodiments are only preferred embodiments of the present utility model, and are not used to limit the scope of implementation of the present utility model, so all equivalent changes made with the contents of the claims of the present utility model should be included in the claims of the present utility model. within the scope of requirements.

Claims (4)

1. a Squeezing Soil Pile pile-forming drilling tool, it is characterised in that include linear cylindrical structure (1), mixed earth stops circle (2), spiral column structure (3) and drill bit (4), described circle Column structure (1), mixed earth stop circle (2) and spiral column structure (3) the most affixed one-tenth Integrally drilling tool, described spiral column structure (3) includes cylinder tube core (31) and clockwise It is arranged on the helical blade (32) of cylinder tube core (31) outer rim, described cylinder tube core (31) The bit adapter arranged by its lower end is connected with drill bit (4), and described mixed earth stops circle (2) It is 7:25 with the aspect ratio of spiral column structure (3), and mixed earth stops circle (2) outer wall limit Edge keeps flushing with helical blade (32) fascia edge.

A kind of Squeezing Soil Pile pile-forming drilling tool the most according to claim 1, it is characterised in that Described mixed earth stop circle (2) is the hollow-sphere structures that little middle part, two is big.

A kind of Squeezing Soil Pile pile-forming drilling tool the most according to claim 2, it is characterised in that Grooving screw thread (21) it is provided with counterclockwise on the outer wall of described mixed earth stop circle (2).

A kind of Squeezing Soil Pile pile-forming drilling tool the most according to claim 3, it is characterised in that Described mixed earth stops that the outer wall of circle (2) is provided with protruding rib (22), described protruding rib (22) The vertical to spaced set of circle (2) outer wall is stopped along mixed earth.