CN1079523A - A kind of conveyor screw bored pile piling cutter - Google Patents
A kind of conveyor screw bored pile piling cutter Download PDFInfo
- Publication number
- CN1079523A CN1079523A CN 93106447 CN93106447A CN1079523A CN 1079523 A CN1079523 A CN 1079523A CN 93106447 CN93106447 CN 93106447 CN 93106447 A CN93106447 A CN 93106447A CN 1079523 A CN1079523 A CN 1079523A
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- Prior art keywords
- cutter
- casing
- base plate
- hole
- tool head
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
A kind of conveyor screw bored pile piling cutter is made of tool head box and cutter.The bottom half of tool head box is the base plate that is provided with earth discharging hole, and cutter is fixed on the casing by inner reinforced plate, and cutter is provided with steady pin; The cutter afterbody of cutter contacts with base plate, and the anterior level of cutter is stretched in the casing outside; The casing of cutter lower front is provided with the withdrawing mouth.The present invention is simple in structure, can process screw on the circular hole wall, processes the groove of platform at the bottom of the hole, loosened soil at the bottom of the hole is carried out spinning handle, become a plane at the bottom of making the hole, it can make castinplace pile have to protrude from the conveyor screw on surface, the stake bottom has platform, and the stake termination is the plane.
Description
The present invention relates to cutter used in a kind of bored pile piling of Foundation Design.
At present, used cutter in the bored pile piling can only be processed light wall cylindrical hole, make to become the surface of castinplace pile be shiny surface, frictional force is less.See Fig. 1, this cutter is made of triangular blade 1, and cutter front end 2 is pointed, so the bore ends that is processed into can only be coniform, makes the stake end and the ground contact area of institute's pile very little, and pile body easily produces sinking.This cutter can not cleaning hole at the bottom of loosened soil, thereby an influence stake end quality of concrete.
The objective of the invention is to avoid above-mentioned weak point of the prior art, and provide in a kind of bored pile piling can process screw on the hole wall, at the groove that processes platform at the bottom of the hole, to the hole at the bottom of loosened soil carry out that spinning is handled, be the cutter on plane at the bottom of the hole.
Purpose of the present invention can reach by following measure:
A kind of conveyor screw bored pile piling cutter, comprise tool head box, be located at the flange that joins with drilling rod on the tool head box and be located at cutter on the tool head box, its special character is that described tool head box has a casing, bottom half is provided with base plate, and base plate is provided with the base plate earth discharging hole; Described cutter is fixed on the casing by inner reinforced plate, and cutter is provided with a steady pin, and the cutter afterbody of cutter contacts with base plate, and the anterior level of cutter is stretched in the casing outside; The casing of cutter lower front is provided with the withdrawing mouth.
Cutter afterbody of the present invention contacts with stressed plate on being fixed in base plate, and the anterior level of cutter is stretched in the casing outside.
Base plate earth discharging hole of the present invention is located on the interior base plate of casing, and described casing is the casing that the side is provided with earth discharging hole.
The accompanying drawing drawing is described as follows:
Fig. 1 is the prior art constructions schematic diagram.
Fig. 2～3 are the structural representation of the embodiment of the invention 1.
Fig. 4 is the structural representation of the embodiment of the invention 2.
Fig. 5 is the structural representation of the embodiment of the invention 3.
The invention will be further described below in conjunction with accompanying drawing:
Referring to Fig. 2～3, the present invention is made of cutter 4 and tool head box 6.Tool head box 6 has a tubular casing 9, its top is a upper cover plate 8, upper cover plate 8 is provided with the flange 7 that is connected usefulness with drilling rod, casing 9 bottoms are base plate 11, base plate 11 is provided with base plate earth discharging hole 16, base plate earth discharging hole 16 is positioned on the base plate 11 of casing 9, and casing 9 sides also are provided with earth discharging hole 10, also is provided with the inner reinforced plate 12 of clamping cutter 4 in the casing 9.Cutter 4 is made of cutter anterior 15 and cutter afterbody 14, and cutter 4 can rotate around steady pin 5, and cutter front portion 15 stretches out in outside the casing 9.The weight of cutter afterbody 14 is greater than cutter front portion 15, when cutter front portion 15 is not subjected to downward pressure and during the maintenance level, the tail end of cutter afterbody 14 just in time contacts with base plate 11.During use, tool head box 6 is connected and fixed by flange 7 and drilling rod, and along with the rotation of drilling rod, the cutter front portion 15 of cutter 4 processes screw on the hole wall of boring.Cutter 4 is processed from top to bottom, and cutter front portion 15 is subjected to a vertical force that makes progress, and this power can balance each other with the reaction force of base plate 11 tool setting afterbodys 14; Cutter anterior 15 suffered with the opposite horizontal force of tool head box 6 direction of rotation, come balance by the active force of the contact site of cutter anterior 15 and casing 9 and cutter afterbody 14 and the contact site of inner reinforced plate 12.The loosened soil that adds man-hour is entered in the casing 9 by casing earth discharging hole 10, is discharged by base plate tap 16 again.Tool head box 6 walks at the bottom of the hole, and its base plate 11 can carry out spinning to loosened soil at the bottom of the hole to be handled, and forms at the bottom of the plane; Cutter 4 can process a horizontal annular groove on the hole wall at the bottom of the hole.Completion of processing is carried on the drilling rod, and then cutter front portion 15 is subjected to the downward resistance of hole wall, and cutter 4 rotates around steady pin 5, and then cutter front portion 15 is retracted in the casing 9 by the withdrawing mouth of being located on the cylindrical shell 93 of its underpart, together proposes outside the hole with tool head box 6.The stake that perfusion forms after the present invention processes, its pile body surface has a conveyor screw, and pile peripheral friction force and bearing capacity are increased greatly; The platform and the stake termination, plane of stake end are improved the bearing capacity of stake end greatly.According to the hardness on stratum, cutter 4 of the present invention can use the cutter of different model, and the cutter number can be 1～4, for saving the cutter materials, a stressed plate 13 can be set, when its height keeps level at cutter anterior 15 between cutter afterbody 14 and base plate 11, just in time contact, make the cutter positioning with cutter afterbody 14; Casing 9 of the present invention can be cylindric, regular polygon tube, triangular column tube etc.Adopt triangular column tube, the base plate earth discharging hole 16 on the base plate 11 is positioned at casing 9 outsides, can not establish earth discharging hole 10 on the casing 9, sees Fig. 4; The area of casing earth discharging hole 10 and base plate earth discharging hole 16 should be 2～3 times of cutter cutting area, helps soil block like this and discharges unlikely the obstruction; The working position of cutter front portion 15 can be zigzag, triangle, rectangle, circular arc etc.; The installation position of cutter 4 is equipped with two kinds: a kind of is that the center cutter line is by tool head box 6 diametric center line or symmetrical center line; Another kind is that center cutter line and tool head box have one along diametric center line and be not more than 45 ° angle, sees Fig. 5.
The present invention compared with prior art has following advantage:
1, the conveyor screw bored concrete pile that adopts the present invention to be processed into, to increase conveyor screw in existing grout pile surface to form screw pouring piles, because structural change, increased the bearing mode of stake, keeping outside the former pile peripheral friction force bearing mode, increased again ground by the supporting force of conveyor screw to stake, as calculated, this part supporting force exceeds the pile peripheral friction force of same pile body more than two times.
2, can carry out spinning to loosened soil at the bottom of the hole with the present invention and process, loosened soil at the bottom of the cleaning hole with basis compaction, had both improved the ground supporting force, had improved again stake end concrete quality, Thereby improved the overhang bracket power of stake.
3, the end of the screw pouring piles that is processed into of the present invention is the plane, has increased again complementary platform, and it is above that a stake end bearing area is doubled than former taper bearing area, thereby bearing capacity is improved.
4, screw pouring piles is because being subjected on every side ground that spirochetal supporting force effect is done the time spent when being subjected to eccentric load, and the supporting force of ground forms the moment of flexure that the reaction moment balance eccentric load causes, therefore makes stake can bear the eccentric load bigger than common cylinder stake.
5, the castinplace pile that forms of prior art has certain anti-uplift force function, but that the structure of screw pile makes stake connect with ground is more tight, can bear higher uplift force.
6, the screw pouring piles that is processed into of the present invention has stability preferably, especially in last hard soft down ground, screw pile can with top hard formation close-coupled, as sedimentation takes place, can only be stake and ground while sedimentation.Screw pouring piles also has stability preferably than other stake under various forms vibration effect, antihunt action is preferably especially arranged when earthquake.
7, the screw pile bearing capacity height that processes with the present invention, under the condition of identical stake diameter and length, screw pile exceeds more than 2～3 times than the bearing capacity of common cylinder stake.Under identical carrying condition, screw pile lacks than the common cylinder stake uses raw material more than 1/3rd.
8, the present invention is simple in structure, dependable performance, and cost is low, and is easy to use.
Claims (3)
1, a kind of conveyor screw bored pile piling cutter, comprise tool head box, be located at the flange that joins with drilling rod on the tool head box and be located at cutter on the tool head box, it is characterized in that: described tool head box has a casing, and bottom half is provided with base plate, and base plate is provided with the base plate earth discharging hole; Described cutter is fixed on the casing by inner reinforced plate, and cutter is provided with a steady pin; The cutter afterbody of cutter contacts with base plate, and the anterior level of cutter is stretched in the casing outside; The casing of cutter lower front is provided with the withdrawing mouth.
2, conveyor screw bored pile piling cutter as claimed in claim 1 is characterized in that: described cutter afterbody contacts with stressed plate on being fixed in base plate, and the anterior level of cutter is stretched in the casing outside.
3, conveyor screw bored pile piling cutter as claimed in claim 1 or 2 is characterized in that: described base plate earth discharging hole is located on the interior base plate of casing, and described casing is the casing that the side is provided with earth discharging hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93106447 CN1079523A (en) | 1993-06-02 | 1993-06-02 | A kind of conveyor screw bored pile piling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93106447 CN1079523A (en) | 1993-06-02 | 1993-06-02 | A kind of conveyor screw bored pile piling cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1079523A true CN1079523A (en) | 1993-12-15 |
Family
ID=4986244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93106447 Pending CN1079523A (en) | 1993-06-02 | 1993-06-02 | A kind of conveyor screw bored pile piling cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1079523A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319499B (en) * | 2007-06-07 | 2012-03-28 | 刘润郊 | Pile forming method and device for screwed pedestal pile with large flow concrete filled by hole drilling pump |
| CN102561343A (en) * | 2012-02-17 | 2012-07-11 | 安徽省建设工程勘察设计院 | Construction method of threaded anchor rod of support structure |
-
1993
- 1993-06-02 CN CN 93106447 patent/CN1079523A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319499B (en) * | 2007-06-07 | 2012-03-28 | 刘润郊 | Pile forming method and device for screwed pedestal pile with large flow concrete filled by hole drilling pump |
| CN102561343A (en) * | 2012-02-17 | 2012-07-11 | 安徽省建设工程勘察设计院 | Construction method of threaded anchor rod of support structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |