RU2327024C2 - Boring tool for hole making for foundation piles and boring unit - Google Patents

Boring tool for hole making for foundation piles and boring unit Download PDF

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Publication number
RU2327024C2
RU2327024C2 RU2005127655/03A RU2005127655A RU2327024C2 RU 2327024 C2 RU2327024 C2 RU 2327024C2 RU 2005127655/03 A RU2005127655/03 A RU 2005127655/03A RU 2005127655 A RU2005127655 A RU 2005127655A RU 2327024 C2 RU2327024 C2 RU 2327024C2
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RU
Russia
Prior art keywords
tool
drilling
boring
soil
drill bit
Prior art date
Application number
RU2005127655/03A
Other languages
Russian (ru)
Other versions
RU2005127655A (en
Inventor
Райнхард РАЙХ (DE)
Райнхард РАЙХ
Original Assignee
Бауэр Машинен Гмбх
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to EP04022732.4 priority Critical
Priority to EP04022732A priority patent/EP1640507A1/en
Application filed by Бауэр Машинен Гмбх filed Critical Бауэр Машинен Гмбх
Publication of RU2005127655A publication Critical patent/RU2005127655A/en
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Publication of RU2327024C2 publication Critical patent/RU2327024C2/en

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/36Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/003Drilling with mechanical conveying means
    • E21B7/005Drilling with mechanical conveying means with helical conveying means
    • E21B7/006Drilling with mechanical conveying means with helical conveying means combined with a bucket-type container

Abstract

FIELD: boring.
SUBSTANCE: instrument contains central tube, coaxial boring axis, at least, one oriented crosscut to boring axis edge, with several cutting teeth, and made as boring scoop transporting device for receive and/or transportation of gravel and sludge material, worked with cutting teeth. At the instrument boring head is fixed with, at least, two picks, located with advance of cutting teeth in boring direction, displaced from each other and distancing from each other forming central clear space. Picks are made arrow-shaped on lower ends with long outer edge and short inner one. For central soil column working horizontal edge is anticipated. Boring head is disconnectable fixed in tube receiving facility on lower end of central tube, which is made multiangular, especially quadrangle.
EFFECT: provision especially accurate piles construction.
8 cl, 5 dwg

Description

FIELD OF THE INVENTION
The present invention relates to a drilling tool for sinking wells for foundation piles in accordance with the restrictive part of paragraph 1 of the claims
State of the art
Wells for foundation piles serve, for example, to build pile foundations or the so-called foundation piles for buildings. A foundation of this type is necessary when the lower layer of soil under the building under construction does not have sufficient bearing capacity. In these cases, through the wells under the foundation piles in the ground, hollow spaces are created, passing to the depth of the layer of sufficient bearing capacity. Then these wells are filled with cement or similar material. To achieve the greatest possible stability of the foundation, it is especially important to build piles in the exact position at the calculated location in the ground. It is particularly desirable to prevent deviations from the direction of the well sinking.
As a tool for sinking wells, for example, so-called drilling buckets are known. Such tools are used in a cyclic drilling method. In this case, the tool is first drilled into the ground. When a sufficient amount of soil material has been developed using the tool and the bucket is full, the tool is taken out of the well, emptied and the next drilling cycle is carried out.
From the patent document of Germany No. 4209854, a well-known tool for drilling holes under piles with a drill screw is screwed into the ground during drilling. In auger drilling, soil material is developed by cutting teeth and transported by the auger to the top. Such tools can be used for continuous and cyclical drilling methods.
For precise orientation and direction of the tool during drilling in this tool, a downward-pointing centering tip mounted on the tool is used.
Since the wells under the piles serve for the construction of foundations, they must have correspondingly large sizes. Therefore, as described in the patent document of Germany No. 4132314 C2, tools for sinking wells should, as a rule, be positioned for drilling, for example, using tracked vehicles. During drilling, the upper part of the drilling tool is guided by this carrier device. For driving especially deep wells beneath piles in this direction, only in the upper part is not enough to perform directionally accurate drilling.
SUMMARY OF THE INVENTION
The problem to which the present invention is directed, is to create a tool for driving holes under piles, providing a particularly accurate construction of piles.
In accordance with the invention, the solution to this problem is achieved in a tool for sinking in the soil of wells under foundation piles containing a central pipe coaxial to the drilling axis, at least one rib oriented transversely to the drilling axis, on which several cutting teeth are located, and a conveying device for receiving and / or transporting soil material developed by cutting teeth. According to the invention, the tool contains at least two cutters located ahead of the cutting teeth in the drilling direction, offset from each other and spaced from each other with the formation of a Central free space.
The main idea of the invention is that a tool for sinking wells can be better guided during drilling in the desired direction due to the double centering function. The first centering function is performed by two cutters, which are located in the center of the lower side of the tool. These two incisors mounted on the instrument at a distance from each other form free space in the center. Part of the soil remains in this free space. Thus, this part of the soil forms a guide cone in the center of the well, which provides a second centering function. These three, four or more incisors offset relative to each other create inner and outer guide surfaces. Due to this double centering function, deep drilling can lead to a depth of 20 to 100 m, while significantly reducing the risk of deviation from the direction on the drill bit.
In a particularly preferred embodiment, the conveying device is in the form of a drill bucket. When drilling using a drilling bucket, the double centering according to the invention is particularly advantageous, since the drilling bucket is directed along the side wall of the well at a relatively short distance of 1 to 3 m. Otherwise (except for double centering), the direction is carried out by a drill rod that is spaced from the side wall of the well .
The use of a drill bucket is especially simplified when it is provided with at least one window with a lockable lid on its underside and a rib with cutting teeth is located on the window. At the same time, during the drilling process, the soil material developed by cutting teeth is transported directly to the interior of the drilling bucket. Due to the possibility of closing this window after filling with soil material, the drilling bucket can be locked and removed from the well for emptying. Thus, soil material cannot fall back into the well.
In a particularly preferred embodiment of the tool, at least two spaced cutters are made in the form of a single drill bit. Since the drill bit is designed to guide the tool in a given direction of drilling, very large forces act on it. Therefore, the implementation of these incisors in the form of a single element for a better perception of such forces is especially beneficial. However, in soils where these forces are not particularly large, three or four separate incisors can be used.
A particularly simple locking of the drill bucket window can be achieved by the fact that the drill bit is rigidly connected to the lid and the lid is rotatably mounted relative to the drill bucket. The rotary connection of the lid relative to the drill bucket is designed so that when the tool actively rotates in the soil in a certain direction of rotation, the lid opens the bucket window due to rotational movement. When the bucket is removed from the well, the tool is rotated in the opposite direction, so that the lid moves to the window overlap position and locks the bucket. Due to this solution, a simple structure is created for locking the drilling bucket window without additional funds on the bucket.
In the following exemplary embodiment, the tool for driving in the soil of wells under piles is characterized in that the conveying device is provided with at least one screw blade mounted on a central pipe. The use of such a conveying blade as a conveying device has the advantage that drilling can be carried out continuously. The developed soil material is transported upward by one or more blades.
In order to strengthen the drilled well from the surrounding soil, in a particularly preferred embodiment, the central pipe is made for introducing the suspension. Then, during the extraction of the drilling tool, a support suspension may be introduced into the well. It is also possible through this central pipe to introduce a binder suspension into the well so as to fill the well with this suspension and then using other means to set the suspension to build a solid body in the well.
In a particularly preferred embodiment, the drill bit is detachably mounted in a receiver at the lower end of the central pipe. In this case, if the drill bit is damaged, it can be replaced as a whole. In addition, with detachable fastening, it is possible to select drill bits according to the lower soil layers in which drilling will be performed, in order to achieve the best operation and the best tool direction when drilling.
In principle, the receiving device for the drill bit can be performed in any way. However, in a particularly preferred embodiment, the receiving device is polygonal, in particular quadrangular. Due to this, the torque of the rotational movement of the tool is particularly well transmitted to the drill bit.
In a particularly preferred embodiment of the tool, on its upper side there is a connecting device for releasably connecting to the drill rod. Through this drill rod, which can be equipped with additional screw elements, torque is transmitted to the tool. The advantage of a detachable connection is that both the drill rod and the tool for sinking wells can be used separately or in conjunction with other devices.
For drilling holes under piles using a tool according to the invention, a drilling rig is provided comprising a mast with a rotation drive located on it and a drill rod that is driven into rotation by a rotation drive. These devices are advisable in that they can be used to drill deep wells, and the diameter of the piles can be selected relatively large. In addition, a drilling rig with a mast serves to further stabilize the direction of the tool for sinking wells.
Next, with reference to the accompanying drawings, preferred embodiments of the invention will be described in detail.
Figure 1 depicts a side perspective view of a tool for sinking in the soil of wells under the foundation piles containing a drilling bucket,
figure 2 depicts a side view in perspective a tool for sinking in the soil of wells under the foundation piles containing a helical blade,
figure 3 and 4 depict in side view the drill bit of a tool for sinking in the soil of wells under the foundation piles,
figure 5 depicts in a side view in perspective a tool for sinking in the soil of wells under the foundation piles, containing in its part two screw blades.
Information confirming the possibility of carrying out the invention
Figure 1 shows in perspective side view a tool 1 for sinking in the soil of wells under foundation piles in an example embodiment with a drilling bucket 2. Torque is transmitted to the tool 1 through a central pipe 20 located coaxially with the drilling axis. On the edge 8 of the bucket are located in a row four cutting teeth 3 for excavation. In front of the rib 8 is a window 11 of the drilling bucket 2, through which the developed material enters the inside of the bucket. When the drilling bucket is filled with enough material, it is closed by a rotary cover 4. This is easily done by rotating the cover 4, which is rigidly connected to the drill bit 5. Turning the cover 4 to the closed position of the window 11 of the drilling bucket 2 is performed by rotation in the opposite direction to the rotation during normal drilling. Thus, the developed material remains locked in the drill bucket 2.
After the tool 1 is again raised to the day surface, the locking mechanism 7 of the cover 4 is opened by the opening mechanism 6. The cover 4, hinged by its lateral side, is tilted, and the soil material freely leaves the drilling bucket 2. After the drilling cover 4 the bucket is closed again, the tool 1 can again be lowered into the well for drilling.
A cylindrical drill bucket 2 is provided on its upper side with a ribbed central pipe 20, which serves to connect with the drill rod. In certain exemplary embodiments, the central pipe 20 may pass right through the drill bucket 2, for example, to introduce the slurry into the well. In this example, it is made in the form of a short tubular nozzle.
Drill bit 5 is detachably mounted on the lower end of the tool for sinking wells. It is inserted into the tubular receiving device 10, which may be part of the central pipe 20. The receiving device 10 is detachably connected to the transverse locking pin 9 inserted into the drill tip 5.
A tool for sinking in the soil of wells under piles in the following exemplary embodiment is shown in FIG. 2. Here, the tool 1 is provided with a helical blade 21, which is welded to the Central pipe 20. They together form a so-called drill auger. The material cut by the cutting teeth 3 is transported by the auger in the direction of the day surface.
The drawing also shows the connecting device 22, which is made on the Central pipe and serves to connect the tool 1 with a drill rod, not shown in the drawing. Through this drill rod, torque is transmitted to tool 1. If a suspension is to be supplied through the central pipe 20 to the well, the drill rod is provided with a device for supplying the suspension. The fastening of the drill bit 5 is performed similarly to the first embodiment. The drill bit 5 is fixed in the receiving device 10 by a finger 9. The tool 1 for driving in the soil of wells under piles in this embodiment is particularly suitable for waterproof soils.
In Fig.3 and 4, the drill bit 5 of a tool for sinking in the soil of wells under piles in two side views. In this embodiment, cutters 31 are shown on the drill bit, made as a single common element. In the area where the drill bit 5 is inserted into the receiving device 10, it has a quadrangular shape. Due to the detachable fastening of the drill bit 5 on the tool 1, it is especially easy to replace it. Thus, the tool for driving in the soil of wells under piles with various drill bits 5 can be especially well selected in accordance with the properties of the developed soil.
In the area intended for input into the receiving device 10, a through groove 32 is made in the drill bit 5. For fastening the drill bit 5 in the receiving device 10 it is also provided with a groove. These two grooves are arranged in such a way that a locking pin 9 for attaching the drill bit 5 can be inserted into both grooves. The step 34 between the cutters 31 and the quadrangular body, intended to be inserted into the receiving device 10 and having rounded corners, serves for particularly good positioning of the drill bit 5 in the receiving device 10. This step 34 helps to ensure that the through groove 32 is aligned with the groove in the receiving device 10 so that the locking pin 9 is freely inserted into both grooves.
Cutters 31 of drill bit 5 are swept at the lower ends with a long outer edge 35 and a short inner edge 36. The long outer edge 35 extends obliquely outward from the axis of rotation of the drill bit 5. This provides a particularly good direction for the drill bit 5 and the entire penetration tool 1 wells. Short inner edges 36, which extend obliquely inward to the axis of rotation, cut into the central column of soil, which ensures the fulfillment of the second centering function. During drilling, this central column of soil extends to a substantially horizontal edge 33 and, when the tool 1 is rotated, is developed by this sharp arcuate edge 33 to allow further movement of the tool into the ground.
In the example embodiment of FIG. 5, the tool 1 for sinking in the soil of wells under piles is equipped with a second screw blade 41, which, like the first screw blade 21, is welded to the central pipe 20. Here, the tool 1 has two ribs 8, 44 with mounted on them cutting teeth 3 for the development of soil material. In the shown embodiment, the cutting teeth 3 are mounted on the ribs along an arc line. The use of two ribs 8, 44 with cutting teeth 3 gives the advantage that the tool 1 is subjected to a symmetrical load during drilling. This symmetrical load on the tool, like the drill bit 5, reduces the deviation of the tool 1 from the desired direction of drilling. In order to achieve particularly good resistance to the drilling direction, an additional guide bead 45 is installed at the end of the shaft.
The second blade 42, welded in the tool 1, is a turn in three quarters of a circle, however, this length is sufficient to achieve a symmetrical load of the tool. On the connecting device 22 of the tool 1, a holding eye 42 is fixed, which serves to transport the tool 1 when it is not mounted on the drill rod. In addition, the connecting device 22 has connecting holes 43. They serve to connect the connecting device 22 with the drill rod with a power circuit. This can be done, for example, using additional locking fingers. However, the connecting holes 43 on the polygonal connecting device 22 can also serve as a connection for supplying a suspension to the central pipe. This suspension may exit into the well, for example, in the area of the drill bit 5 through the outlet in the Central pipe 20.
Drilling tools for sinking boreholes under piles provide particularly accurate piling construction.

Claims (8)

1. A tool (1) for sinking in the soil of wells under foundation piles containing a central pipe (20) coaxial to the drilling axis, at least one rib (8) oriented transversely to the drilling axis, on which several cutting teeth (3) are located, and a conveyor made in the form of a drilling bucket for receiving and / or transporting soil material developed by cutting teeth, characterized in that a drill bit (5) is installed on it with at least two cutters (31) located ahead of the cutting tooth ev (3) in the direction of drilling, offset relative to each other and spaced from each other with the formation of a Central free space, and the cutters are swept at the lower ends with a long outer edge (35) and a short inner edge (36), and to develop a central column a substantially horizontal edge (33) is provided for the soil, the drill bit (5) being detachably fixed in the tubular receiving device (10) at the lower end of the central pipe (20), which is polygonal, in particular quadrangle th.
2. The tool according to claim 1, characterized in that the drilling bucket (2) on its lower side is provided with at least one window (11) with a lockable lid (4), and on the window (11) there is a rib (8) with cutting teeth (3).
3. The tool according to any one of claims 1 and 2, characterized in that at least two spaced cutters (31) are made in the form of a single drill bit (5).
4. The tool according to claim 1, characterized in that the drill bit (5) is rigidly connected to the cover (4), and the cover (4) is mounted for rotation relative to the drill bucket (2).
5. A tool according to any one of claims 1 and 2, characterized in that the conveying device is provided with at least one screw blade (21), mounted on a central pipe (20).
6. A tool according to any one of claims 1 and 2, characterized in that the central pipe (20) is configured to introduce a suspension.
7. A tool according to any one of claims 1 and 2, characterized in that on its upper side there is a connecting device (22) for detachable connection with a drill rod.
8. A drilling rig comprising a mast with a rotation drive located on it and a drill rod that is driven into rotation by a rotation drive, characterized in that a tool (1) is provided for sinking in the soil of wells for foundation piles, as claimed in any one of claims 1 to 7.
RU2005127655/03A 2004-09-23 2005-08-29 Boring tool for hole making for foundation piles and boring unit RU2327024C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04022732.4 2004-09-23
EP04022732A EP1640507A1 (en) 2004-09-23 2004-09-23 Pile drilling apparatus

Publications (2)

Publication Number Publication Date
RU2005127655A RU2005127655A (en) 2007-03-10
RU2327024C2 true RU2327024C2 (en) 2008-06-20

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RU2005127655/03A RU2327024C2 (en) 2004-09-23 2005-08-29 Boring tool for hole making for foundation piles and boring unit

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US (1) US20060060386A1 (en)
EP (1) EP1640507A1 (en)
JP (1) JP4031496B2 (en)
RU (1) RU2327024C2 (en)
SG (1) SG121098A1 (en)

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RU2722612C1 (en) * 2016-08-24 2020-06-02 Бауэр Машинен Гмбх Working machine and method of soil treatment

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EP2696027B1 (en) 2012-08-06 2016-06-15 BAUER Spezialtiefbau GmbH Drilling bucket and method for drilling a bore hole
ES2525921T3 (en) * 2012-08-13 2015-01-02 Bauer Spezialtiefbau Gmbh Procedure and device to produce and measure a perforation
EP2740882B1 (en) 2012-12-04 2016-09-21 BAUER Maschinen GmbH Drilling device and method for producing a borehole
US10227748B2 (en) 2015-04-09 2019-03-12 Jaron Lyell Mcmillan Tooth attachment for a drill and a drill incorporating the same
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Also Published As

Publication number Publication date
EP1640507A1 (en) 2006-03-29
RU2005127655A (en) 2007-03-10
JP4031496B2 (en) 2008-01-09
JP2006090120A (en) 2006-04-06
SG121098A1 (en) 2006-04-26
US20060060386A1 (en) 2006-03-23

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Effective date: 20090830