CN205907677U - A kind of reaming pile and its drilling tool - Google Patents

Abstract

The utility model provides a reaming stake and drilling tool thereof. The reaming pile includes the pile foundation, fills in the concrete pile body and the reaming portion of pile foundation, reaming portion includes certainly the pile foundation head that the pile foundation bottom extends the formation, cover in the cement paste layer of pile foundation head inner wall, fill in the intraformational concrete pile head of cement paste. The expansion head is set to be of a double-layer structure of the inner barrel and the outer barrel, the flaring teeth are arranged on the inner barrel, the expansion head is rotated to control the stretching out and the shrinking of the flaring teeth, and flaring of different soil qualities is completed.

Description

A kind of reaming pile and its drilling tool

【Technical field】

The utility model relates to the field of construction engineering, in particular to a reaming pile and a drilling tool thereof.

【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 and a drilling tool used under complex geological conditions.

【Content of utility model】

The purpose of the utility model is to provide a reaming pile and a drilling tool thereof.

The technical scheme of the utility model 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 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 utility model 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 the utility model reaming pile;

Fig. 2 is the structural diagram of the utility model drilling tool;

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 description】

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

Please refer to FIG. 2 to FIG. 4 at the same time. The utility model provides a drilling tool 100 including a drill pipe 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.

Please refer to Fig. 1, the utility model also provides a reaming pile 300 completed by using the drilling tool 100. Hole 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.

The beneficial effects of the utility model are: the expanding 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 expanding teeth are controlled by using the rotation of the expanding head to complete For the expansion 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 utility model, and it should be pointed out that for those of ordinary skill in the art, improvements can also be made without departing from the inventive concept of the utility model, but these all belong to Protection scope of the present utility model.

Claims (9)

1. a kind of hole-expanding pile is it is characterised in that include pile foundation, the concrete-pile body being filled in pile foundation and reamer, described expansion Hole portion includes extending the pile foundation head being formed, being covered in the grout layer of described pile foundation head inwall, be filled in from described pile foundation bottom Described cement mortar in the layer concrete pile head.

2. hole-expanding pile according to claim 1 is it is characterised in that described concrete-pile body and described concrete-pile are first Body form.

3. a kind of drilling tool it is characterised in that: include the drilling rod of tool drill bit and be sheathed on the enlarged footing of described drill bit, described enlarged footing Including enlarging tooth, inner core and the outer tube being sheathed on inner core, and described inner core and described outer tube interval setting, described inner core includes card Buckle, described outer tube includes limiting section and extending port, described limiting section quantity be two and be spaced be formed at the interior of described outer tube On periphery, described clamping part is formed on the outer peripheral edge of described inner core and is arranged between two described limiting sections, described stretches out Mouth is the through hole running through described outer tube, and described enlarging tooth includes with the connecting portion of described inner core activity and extends from described connecting portion And insert the expansion mouth of described extending port.

4. drilling tool according to claim 3 it is characterised in that: described drilling rod also includes body and the spiral being sequentially connected Post, described borded pile extends from described drill bit and is formed, and described body, borded pile and drill bit are arranged with central shaft.

5. drilling tool according to claim 3 it is characterised in that: described inner core and the open circles that described outer tube is same central shaft Cylinder.

6. drilling tool according to claim 3 it is characterised in that: described inner core and described outer tube pass through described limiting section and institute State clamping part and in the long scope of the circular arc between two described limiting sections reverse coaxial rotating.

7. drilling tool according to claim 3 it is characterised in that: between two described limiting sections the length of circular arc string be less than institute State the length of expansion mouth.

8. drilling tool according to claim 3 it is characterised in that: by rotating against of described inner core and described outer tube, institute State expansion mouth to stretch out along described extending port direction and shrink.

9. drilling tool according to claim 3 it is characterised in that: described limiting section and described clamping part are formed at same level Face.