CN2221098Y - Special bottom expanding drill - Google Patents
Special bottom expanding drill Download PDFInfo
- Publication number
- CN2221098Y CN2221098Y CN 94239852 CN94239852U CN2221098Y CN 2221098 Y CN2221098 Y CN 2221098Y CN 94239852 CN94239852 CN 94239852 CN 94239852 U CN94239852 U CN 94239852U CN 2221098 Y CN2221098 Y CN 2221098Y
- Authority
- CN
- China
- Prior art keywords
- lower shaft
- expand
- shaft bar
- base ring
- expanding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Piles And Underground Anchors (AREA)
Abstract
The utility model relates to a special bottom expanding drill which is characterized in that the shaft line of a bottom expanding shaft lever 1 deviates from the central line of a bottom expanding ring 3 by a plurality of centimeters and is vertical to the plane of the bottom expanding ring 3. Compared with a conventional drill, the utility model has the advantages that the drill can be conveniently applied to expanding the bottoms of cast-in-situ bored piles with major diameters and root piles with minordiameters to form expanded bottom piles and expanding the other regions of pile holes, with the advantages of simple structure, convenient operation, high expanding efficiency, etc.
Description
The utility model relates to the cast-in-place concrete pile that a kind of bottom enlarges, and relates in particular to the facility that enlarge at the bottom of a kind of.
Expanded bore pile can improve the bearing capacity of stake effectively, and extraordinary bottom expanding drill is the significant improvement to conventional drilling tool.Conventional drilling tool comprises axostylus axostyle, apex point, blade ring, blade and the reinforcing rib of hollow, wherein the axostylus axostyle upper end is provided with the internal thread that is connected with drilling rod, fixedly connected with apex point in its bottom, blade is arranged on the outer peripheral face of blade ring, and blade ring and axostylus axostyle are perpendicular, and be welded on the axostylus axostyle, the same axostylus axostyle of reinforcing rib, the blade ring that are in tilted layout with axostylus axostyle are welded as a whole, and outward appearance is is inverted pagoda shape, and this drilling tool can only be used for general boring, do not have the reaming function, thereby can not form expanded bore pile.Once the someone proposed the bored pile base-enlarging method in the past, but used implement structure complexity is used inconvenience, and few people use at the construction field (site).
The purpose of this utility model provides a kind of practical extraordinary bottom expanding drill, can enlarge the bottom of stake apace.This drilling tool structure is simple, and is easy to operate, the efficiency of construction height.
Design utilizes the eccentric rotary principle, and the pile cutoff place that enlarges at needs is replaced with eccentric drilling device with conventional drilling tool, and the surface of revolution is increased, and realizes reaming.Can be used for enlarging the stake end, also can enlarge any position of pile body.
Extraordinary bottom expanding drill of the present utility model, the expansion lower shaft bar 1 that comprises hollow, expand subdrilling point 2, expand base ring 3, blade 4, reinforcing rib 5, wherein expand lower shaft bar 1 upper end and be provided with the internal thread that is connected with drilling rod, fixedly connected with expansion subdrilling point 2 in its bottom, blade 4 is arranged on the outer peripheral face that expands base ring 3, and it is perpendicular with expansion lower shaft bar 1 to expand base ring 3, and be welded on and expand on the lower shaft bar 1, the reinforcing rib 5 that is in tilted layout with expansion lower shaft bar 1 expands lower shaft bar 1 together, expand base ring 3, be welded as a whole, it is characterized in that the distance between center line that expands the axis of lower shaft bar 1 and expand base ring 3 is 15～30 centimetres, and vertically expand the plane of base ring 3; Expand eccentric throw that lower shaft bar 1 axis runout expands base ring 3 center lines and be 10%～30% of aperture that unidimensional conventional drilling tool forms.Blade 4 also can adopt the alloy insert.
Use the operating procedure that this extraordinary bottom expanding drill enlarges the stake bottom:
1. after forming conventional aperture with conventional drilling tool, replace conventional drilling tool with this drilling tool;
2. this drilling tool is vertically transferred along former aperture to the bottom of boring, reaming is implemented in start;
3. after reaming was finished, it was standby to ground to promote this drilling tool.
Compared with the prior art, the advantage of this drilling tool is: simple in structure, cost is low, it is fast, easy to use to expand stake speed, is applicable to that the large-diameter concrete bored pile expands the end or the minor diameter root pile expands the end, also can be used for enlarging an aperture at any position, hole, form required stake type.
Fig. 1 is the structural representation of this drilling tool.
Fig. 2 is for expanding stake place view profile, and shade partly is the effective reaming area of this drilling tool, and e is an eccentric throw, d is the aperture that conventional drilling tool forms, the aperture that D forms for this drilling tool, and O is conventional drilling tool axostylus axostyle bar line, O ' is expansion lower shaft bar 1 axis of this drilling tool, expands the stake footpath D=d+2e that the end forms.
Embodiment:
A kind of extraordinary bottom expanding drill, its eccentric distance e=150mm is that the conventional drilling tool of d converts by producing the aperture.Form aperture d=600mm with conventional drilling tool, be drilled into the predetermined degree of depth after, promote drilling rod to ground, change bottom expanding drill into, transfer to desired depth, start rig, with former aperture 600mm, be expanded into 900mm.Like this, stake end loaded area has enlarged 1.25 times.
Claims (2)
1. extraordinary bottom expanding drill, the expansion lower shaft bar [1] that comprises hollow, expand subdrilling point [2], expand base ring [3], blade [4], reinforcing rib [5], wherein expand lower shaft bar [1] upper end and be provided with the internal thread that is connected usefulness with drilling rod, fixedly connected with expansion subdrilling point [2] in its bottom, blade [4] is arranged on the outer peripheral face that expands base ring [3], it is perpendicular with expansion lower shaft bar [1] to expand base ring [3], and be welded on and expand on the lower shaft bar [1], the reinforcing rib [6] that is in tilted layout with expansion lower shaft bar [1] expands lower shaft bar [1] together, expand base ring [3] and be welded as a whole, it is characterized in that: the axis that expands lower shaft bar [1] is 15～30 centimetres with the distance between center lines that expands base ring [3], and, expand lower shaft bar [1] eccentric rotary and form the stake bottom that enlarges perpendicular to the plane of expanding base ring [3].
2. according to the extraordinary bottom expanding drill of claim 1, it is characterized in that: described blade [4] adopts the alloy steel insert.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94239852 CN2221098Y (en) | 1994-12-16 | 1994-12-16 | Special bottom expanding drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94239852 CN2221098Y (en) | 1994-12-16 | 1994-12-16 | Special bottom expanding drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2221098Y true CN2221098Y (en) | 1996-02-28 |
Family
ID=33846974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94239852 Expired - Fee Related CN2221098Y (en) | 1994-12-16 | 1994-12-16 | Special bottom expanding drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2221098Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538856A (en) * | 2009-04-15 | 2009-09-23 | 曾庆义 | Construction method of anchor rod with expanded head |
| CN101139837B (en) * | 2007-08-02 | 2010-05-26 | 夏良站 | Construction plant for tree-root shaped pile |
-
1994
- 1994-12-16 CN CN 94239852 patent/CN2221098Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139837B (en) * | 2007-08-02 | 2010-05-26 | 夏良站 | Construction plant for tree-root shaped pile |
| CN101538856A (en) * | 2009-04-15 | 2009-09-23 | 曾庆义 | Construction method of anchor rod with expanded head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |