CN105951748B - Drilling tool - Google Patents

Abstract

The present invention provides an expanded hole pile and a construction method and drilling tool for the expanded hole pile. The expanded hole pile includes a pile foundation, a concrete pile body filled in the pile foundation, and an expanded hole portion, wherein the expanded hole portion includes a pile foundation head extending from the bottom of the pile foundation, a cement slurry layer covering the inner wall of the pile foundation head, and a concrete pile head filled in the cement slurry layer. The expanded head is set as a double-layer structure of an inner tube and an outer tube, and the expanding teeth are set in the inner tube. The expansion teeth are controlled to extend and contract by rotating the expanded head to complete the expansion of different soils. The structure is simple in design, low in cost, good in effect, and suitable for mass production and popularization.

Description

a drilling tool

【Technical field】

The invention relates to the field of construction engineering, in particular to a drilling tool for reaming piles.

【Background technique】

With the increase of building height, the foundation pile length gradually increases, and the difficulty of pile foundation construction is also increasing. 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; Piles may not meet the requirements.

Therefore, it is necessary to provide a reaming pile used under complicated geological conditions, a construction method of the reaming pile and a drilling tool thereof.

【Content of invention】

The object of the present invention is to provide a reaming pile, a construction method of the reaming pile and a drilling tool thereof.

Technical scheme of the present invention is as follows:

A reaming pile, comprising a pile foundation, a concrete pile body filled in the pile foundation, and a reaming part, the reaming part includes a pile foundation head extending from the bottom of the pile foundation, covering the inner wall of the pile foundation head The cement slurry layer and the concrete pile head filled in the cement slurry layer.

Preferably, the concrete pile body and the concrete pile head are poured integrally.

A construction method for a reaming pile, comprising the steps of:

(1), providing a drilling tool, and using the drilling tool to rotate forward to drill holes in the soil;

(2), when the drilling depth of the drilling tool reaches the preset depth of the pile foundation, stop the drilling tool;

(3), the drilling tool includes an enlarging head at its bottom, the enlarging head has flaring teeth and a protruding opening, the enlarging head is driven to rotate in reverse by the drill rod, and the flaring teeth pass through the protruding opening Stretch out to the outside, expand the bottom of the pile foundation through the flaring teeth, and stop the drilling tool after forming the pile foundation head;

(4) Drive the enlarging head to rotate in the forward direction again, so that the flaring teeth extend inward through the protruding opening and are accommodated in the protruding opening, then stop the drilling tool;

(5), the inner wall of the pile foundation head is sprayed to form a cement slurry layer;

(6) After the grouting is completed, the drilling tool is screwed out from the pile foundation, and at the same time, concrete is poured into the pile foundation head and the pile foundation in turn;

A drilling tool, comprising a drill pipe with a drill bit and an expanding head sleeved on the drill bit, the expanding head includes flaring teeth, an inner cylinder and an outer cylinder sleeved on the inner cylinder, and the inner cylinder and the The outer cylinder is arranged at intervals, the inner cylinder includes a buckle portion, the outer cylinder includes a limiting portion and an extension opening, the number of the limiting portions is two and formed at intervals on the inner peripheral edge of the outer cylinder, the locking portion The buckle is formed on the outer peripheral edge of the inner cylinder and is clamped between the two limiting parts, the protruding opening is a through hole passing through the outer cylinder, and the flaring teeth are included with the inner cylinder A movable connection part and a flaring part extending from the connection part and inserted into the protruding opening.

Preferably, the drill rod further includes a body and a helical column connected in sequence, the helical column is formed by extending from the drill bit, and the body, the helical column and the drill bit are arranged concentrically.

Preferably, the inner cylinder and the outer cylinder are hollow cylinders with concentric axes.

Preferably, the inner cylinder and the outer cylinder pass through the limiting portion and the buckle portion and rotate coaxially in opposite directions within an arc length between the two limiting portions.

Preferably, the length of the arc chord between the two limiting parts is smaller than the length of the flaring part.

Preferably, through the relative rotation of the inner cylinder and the outer cylinder, the flaring portion protrudes and contracts along the direction of the protruding opening.

Preferably, the limiting portion and the locking portion are formed on the same horizontal plane.

The beneficial effects of the present invention are:

The enlarging head is set as a double-layer structure of the inner cylinder and the outer cylinder, and the flaring teeth are set on the inner cylinder, and the expansion and contraction of the flaring teeth are controlled by the rotation of the enlarging head, and the flaring of different soil properties is completed. The structure design is simple, the cost is low, the effect is good, and it is suitable for mass production and popularization.

【Description of drawings】

Fig. 1 is the sectional view of reaming pile of the present invention;

Fig. 2 is the structural diagram of drilling tool of the present invention;

Fig. 3 is a sectional view of the use state one of the expanding head of the drilling tool shown in Fig. 2;

Fig. 4 is a cross-sectional view of the second use state of the expanding head of the drilling tool shown in Fig. 2 .

【Detailed ways】

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

Please refer to FIG. 2 to FIG. 4 at the same time, the present invention provides a drill tool 100 , including a drill rod 2 with a drill bit 21 .

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.

The inner barrel 12 includes a locking portion 121 .

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 extension opening 133 is a through hole penetrating through the outer cylinder 13 .

The flaring tooth 11 includes a connecting portion 111 movable with the inner barrel 12 and a flaring portion 112 extending from the connecting portion 111 and inserted into the protruding opening 133 .

The inner cylinder 12 and the outer cylinder 13 are hollow cylinders with concentric axes; The length of the circular arc between the two limiting parts 131 rotates coaxially in opposite directions; specifically, the length of the chord of the arc between the two limiting parts 131 is smaller than the length of the flaring part 112 .

Through the relative rotation of the inner cylinder 12 and the outer cylinder 13 , the flaring portion 112 protrudes and contracts along the direction of the protruding opening 133 .

The limiting portion 131 is formed on the same level as the locking portion 121 .

The outer cylinder 13 is integrally formed; the inner cylinder 12 is integrally formed.

A hinge 14 is also included, and the hinge 14 connects the flaring teeth 11 and the inner cylinder 12 .

In this embodiment, in FIG. 3 , the drill rod drives the inner cylinder 12 to rotate counterclockwise, and the arc length of the outer cylinder 13 between the two limiting portions 131 through the buckle portion 121 Rotate clockwise within the range; make the flaring part 112 shrink along the direction of the protruding opening 133 .

In FIG. 4 , the drill rod drives the inner cylinder 12 to rotate clockwise, and the outer cylinder 13 rotates counterclockwise within the arc length range between the two limiting portions 131 through the buckle portion 121 ; The flaring portion 112 shrinks along the direction of the protruding opening 133 .

The drill pipe 2 further includes a body 22 and a screw column 24 connected in sequence, the screw column 24 is formed by extending from the drill bit 21 , and the body 22, the screw column 24 and the drill bit 21 are arranged concentrically.

Referring to Fig. 1, the present invention also provides a reaming pile 300 completed by using the drilling tool 100. The reaming pile 300 includes a pile foundation 31, a concrete pile body 32 filled in the pile foundation 31, and a reaming pile. part 4.

The reaming part 4 includes a pile foundation head 41 extending from the bottom of the pile foundation 31, a cement slurry layer 42 covering the inner wall of the pile foundation head 41, and a concrete pile head filled in the cement slurry layer 42. 43.

In this embodiment, the concrete pile body 32 and the concrete pile head 43 are cast integrally.

A construction method for a reaming pile, comprising the steps of:

(1), providing a drilling tool, and using the drilling tool to rotate forward to drill holes in the soil;

(2), when the drilling depth of the drilling tool reaches the preset depth of the pile foundation, stop the drilling tool;

(3), the drilling tool includes an enlarging head at its bottom, the enlarging head has flaring teeth and a protruding opening, the enlarging head is driven to rotate in reverse by the drill rod, and the flaring teeth pass through the protruding opening Stretch out to the outside, expand the bottom of the pile foundation through the flaring teeth, and stop the drilling tool after forming the pile foundation head;

(4) Drive the enlarging head to rotate in the forward direction again, so that the flaring teeth extend inward through the protruding opening and are accommodated in the protruding opening, then stop the drilling tool;

(5), the inner wall of the pile foundation head is sprayed to form a cement slurry layer;

(6) After the grouting is completed, the drilling tool is screwed out from the pile foundation, and at the same time, concrete is poured into the pile foundation head and the pile foundation in turn.

The beneficial effects of the present invention are: the enlarging head is set as a double-layer structure of the inner cylinder and the outer cylinder, the flaring teeth are arranged on the inner cylinder, and the extension and contraction of the flaring teeth are controlled by the rotation of the enlarging head to complete the pairing. Flaring of different soil properties, the structure has simple design, low cost, good effect, and is suitable for mass production and popularization.

What has been described above is only the embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of the present invention, but these all belong to the present invention. scope of protection.

Claims (7)

1. a kind of drilling tool, it is characterised in that：Including having the drilling rod of drill bit and being sheathed on the enlarged footing of the drill bit, the enlarged footing Including flaring tooth, inner cylinder and the outer barrel for being sheathed on inner cylinder, and the inner cylinder and outer barrel interval setting, the inner cylinder include card Buckle, the outer barrel include limiting section and extending port, and the limiting section quantity is two and interval is formed in the interior of the outer barrel On periphery, the clamping part is formed on the outer peripheral edge of the inner cylinder and is arranged between two limiting sections, the stretching Mouth is, through the through-hole of the outer barrel, the flaring tooth includes extending with the movable interconnecting piece of the inner cylinder and from the interconnecting piece And it is inserted into the expansion mouth of the extending port.

2. drilling tool according to claim 1, it is characterised in that：The drilling rod further includes sequentially connected ontology and spiral Column, the borded pile are extended to form from the drill bit, and the ontology, borded pile and drill bit are arranged with central shaft.

3. drilling tool according to claim 1, it is characterised in that：The inner cylinder and the outer barrel are the open circles with central shaft Cylinder.

4. drilling tool according to claim 1, it is characterised in that：The inner cylinder and the outer barrel pass through the limiting section and institute State reversed coaxial rotating in clamping part and circle arc length between two limiting sections.

5. drilling tool according to claim 1, it is characterised in that：The length of circular arc string is less than institute between two limiting sections State the length of expansion mouth.

6. drilling tool according to claim 1, it is characterised in that：Pass through the relative rotation of the inner cylinder and the outer barrel, institute Expansion mouth is stated to stretch out and shrink along the extending port direction.

7. drilling tool according to claim 1, it is characterised in that：The limiting section is formed in same flat with the clamping part Face.