JPH0633444A - Soil disposing of construction auger and device therefor - Google Patents

Abstract

PURPOSE:To carry out a smooth fluidization of soil for effective removal of it attached to an auger fins and the reuse of treated soil in connection with underground structuring such as improvement of soft ground and foundation piling, etc. CONSTITUTION:Superplasticizing agent in a tank 23 which contain surfactant and the water of a water tank 24 of a soil-stripping material plant A are mixed in a mixing and stirring tank 22 and stored in a soil-stripping material tank 19 and the flow of the mixture is controlled to a specified flow rate by a flow control valve 20, and the flow is sent under the pressure of compressed air from an air tank 16, in a mix of air and fluid via respective valves 17. Soil- stripping material 25 is jetted out from a jet nozzle of a shank 9 to hit a shank 2 of an auger 1 and a spiral fin 3 to forcibly remove excavated soil attached to the shank and the fin, and at the same time crush it to finely divided particles. Then, it is discharged from a chute 5 to a soil disposing pump 7, and mixed with a cement milk in a batcher plant, and is supplied to drilling holes 32 by a treated soil pump through a transmitting hose via a swivel joint to form soil cement columns.

Description

Detailed Description of the Invention

[0001]

[Industrial application] The disclosed technology is designed to remove soil that adheres to the fins of an auger such as a spiral fin type used for excavating the ground when improving soft ground or constructing underground structures such as soil cement columns. It belongs to the field of technology for surely removing and forming slurry during or after excavation.

[0002]

As is well known, mountainous areas occupy a wide area,
In Japan, where the coastline is long and deep,
Effective use of the national land is a very important issue, and in order to secure land for various industrial facilities and houses, as well as agricultural land in a limited plain area, for example, rivers, lakes and basins and shallow water are used. So-called ground improvement for soft ground such as coasts and construction of structures such as foundation piles and continuous underground walls are extremely important, and various technologies have been researched, developed, and improved for practical use since ancient times. Moreover, various studies are still being made even now.

[0003] In the improvement of such soft ground and the construction of underground structures, means for injecting various kinds of improving materials into the ground or filling the ground with replacement soil are widely used. .

For the excavation of the hole, a casing pipe and an auger are provided along the leader of the truck loaded and set on the ground, but the ease of excavation, power, cost, construction accuracy, etc. In this respect, the auger in which the spiral fin is integrally attached to the shank on the screw type has been widely used, and it has been widely used for the construction of underground piles such as soil cement columns and continuous underground walls. Adding to the promotion of construction work.

When drilling holes with various kinds of augers, discharge of the initial improving material is not performed, and then the auger is rotated in the reverse direction or the auger is lifted by a predetermined stroke to fill the improving material to be discharged in the subsequent stage. Although excavated soil is discharged to the ground, most of the soil in the ground is a soft clay soil as is well known.
The soil is attached to the spiral fin of the auger in a lump form.

[0006]

In order to deal with this, naturally, it is conceivable to remove the soil adhering to the spiral fin of the auger or the shank, and peeling and removing with the energy of the water jet or air jet. Although there is technology, in order to ensure certainty, in general, as a very primitive work, each time a worker uses a scoop, a cutter, etc. to perform mechanical peeling work manually to remove soil, or A simple scraper is attached to a bracket that is flexibly installed at the work site to remove soil with the rotation of the auger, but the former requires extremely heavy labor and is dangerous. There is a drawback with.

[0007] Further, there is a drawback that the soil discharged in a lump form has a large resistance to the transportation processing to the subsequent processing and the like, and the processing efficiency decreases.

[0008]

OBJECT OF THE INVENTION The object of the invention of this application is the problem of removing the excavated soil adhering to the shank or spiral fin of an auger which is widely used in various civil engineering construction works based on the above-mentioned prior art, and the transportation to the subsequent stage. The technical issue to be solved is to maintain the function of the auger without sacrificing the original advantages of the auger, and to smoothly transport the excavated soil to the subsequent stage such as discharge and disposal.
It is intended to provide an excellent soil treatment method for an auger for construction work, which is useful in the field of civil engineering in the construction industry by being sufficiently usable for repeated construction, and a device directly used for the method. It is a thing.

[0009]

In order to solve the above-mentioned problems, the structure of the invention of this application, which has been made in line with the above-mentioned object and has the subject matter of the above-mentioned claims, is intended to solve the above-mentioned problems. When constructing an underground structure such as a cement column, place an auger such as a spiral fin integrally fixed to the shank on the ground to the ground, along the leader of the construction trolley, and drill a predetermined hole. In the process of forming by excavation, the excavated soil that is held between the fins of the auger and rises from the jet nozzle facing the fin of the auger to the cover frame provided at the excavation site of the auger. The liquid and the fluidizing agent containing the surface active agent, etc. are mixed and stirred by a mixer, and the stripping material is pressure-fed by a gas such as high-pressure air at a predetermined pressure to perform the process. The mixture is made into a gas-liquid mixture containing bubbles and jetted as a jet to the fin, and the excavated soil adhering to the fin is separated and removed by the energy and discharged through a chute, and the stripping material concerned is gas-liquid. Since it is a mixed fluid, it does not damage the fins and shanks at all, and it also crushes the soil and imparts fluidity by making it into a slurry with a finely divided liquid component, reducing the flow resistance, and as a result, Pipes can be transported smoothly, and the discharged stripped soil is further transported together with improved materials such as cement milk through the swivel joint of the auger into the shank to be transported smoothly as underground piles such as soil cement columns. During this period, the flow rate and specific gravity of the stripping material, the pressure of the transport gas, etc. are adjusted to the set values as appropriate, while the auger is set to a single Even type, in which took technical means as it can be applied even features multi-axis type.

[0010]

Embodiments of the invention of this application will be described below with reference to the drawings.

The embodiment is a mode in which three augers are provided as a multi-axis auger.

In the basic embodiment shown in FIG. 1 to FIG. 4, a single fin type auger 1 is shown, and a hole feed water for assisting hole formation for forming a hole is supplied. And a screw type spiral fin 3 is integrally provided on the outer surface of the hollow shank 2 having a feed passage for feeding the improved material such as cement milk in the subsequent stage, for guiding, , Is installed concentrically in the casing pipe 4 for soil uplifting, is hung along the leader of a crawler type trolley (not shown), and has a swivel joint (not shown) on the upper part, and a drive device thereon. A static pressure applying device is connected so that a hole for a predetermined ground can be excavated.

A chute 5 is obliquely provided at a predetermined soil discharging portion of the casing pipe 4 and faces the soil discharging pump 7 through a guide 6.

A cover frame 8 is provided on the back of the chute 5, and a stripping material chamber 9 is formed in the cover frame 8 to provide a predetermined number of jet nozzles 1 for the shank 2.
A slit panel 11 having 0, 10 ... Is provided.

As shown in FIGS. 2 and 3, all the jet nozzles 10, 10 ... Are faced to the respective spiral fins 3, 3 of the three augers 1, 1, 1. .

Thus, the tip of the pipe 14 for pressure-feeding the stripping material is connected to the inlet 12 provided in the stripping material chamber 9 of the cover frame 8 with the opening / closing valves 13 and 13 '. The end is connected to a high pressure air tank 16 to which a compressor 15 is connected, and a pressure adjusting valve 17 and a pressure gauge 18 are interposed in the middle.

A stripping material tank 19 is connected to a predetermined portion of the stripping material pressure-feeding pipe 14 via a pipe 14 'through a flow rate adjusting valve 20, and the stripping material tank 1 is also provided.
A stripping material mixing and stirring tank 22 is connected to 9 by a pipe 14 ″ via a pump 21, and the mixing and stirring tank 22 includes:
For example, a storage tank 23 for a fluidizing agent such as a surfactant and a water tank 24 are connected via open / close valves 13 ″ and 13 ′ ″ to form a stripping material plant A.

Therefore, the stripping material from the stripping material tank 19 of the stripping material plant A is supplied via the flow rate adjusting valve 20 from the stripping material pumping pipe 14 to the pressure adjusting valve 17 for the high pressure air from the high pressure air tank 16. Is sent to the stripping material chamber 9 in a gas-liquid mixed state containing air bubbles by adjusting pressure through the stripping material, and is sent as the stripping material 25 in the gas-liquid mixed state, and is jetted from the jet nozzles 10, 10 ... As shown in FIG. 4, for the fin 3 and the shank 2,
The excavated soil 26 held between these spiral fins 3 is crushed by kinetic energy by being ejected and collided with these surfaces at a predetermined dynamic pressure. It is designed so that it can be discharged in a predetermined manner.

In the above-mentioned apparatus plant configuration, the drilling excavation is performed on the predetermined ground by the three-series multi-axis augers 1, 1, 1 in the same manner as in the conventional manner, and the excavated soil 26 is obtained by reversing and raising each auger 1. Is spiral fin 3
The excavated soil is basically adhered to the spiral fin 3 and the shank 2 as described above, while it is clamped between the two and rises and is discharged from the soil discharge pump 7 through the chute 5 in a predetermined manner. It adheres strongly to the lump, does not easily spontaneously peel, and tries to rise in a co-rotating manner.

Thus, in the invention of this application, the open / close valve 13 close to the cover frame 8 for the stripping material pressure-feeding pipe 14 is closed at the time of the excavation, and is opened in the soil discharging process to remove the stripping material tank 19. Flow control valve 20
Is opened to a predetermined opening degree and the pressure adjusting valve 17 is opened to a predetermined degree, the stripping material 25 is pressure-fed by high-pressure air, and a kind of in-pipe gas-liquid mixing action is performed in the pressure feeding process. It is pumped as a fluid in a gas-liquid mixed state containing bubbles and is pumped into the stripping material chamber 9 and jetted from each jet nozzle 10 of the slit panel 11 as a jet of the stripping material 25 in the gas-liquid mixed state. It collides toward the surface of the shank 2 of the auger 1 and the spiral fin 3, and its kinetic energy gives an impacting action to the excavated soil adhering to it, and the soil is fragmented and gradually peeled off, and it becomes a liquid-containing state. As a result, a slurry-like stripped soil 26 is discharged from the chute 5 through the guide 6 through the soil discharge pump 7 together with the jet flow of the soil stripping material 25, and is then delivered to the next stage processing in a predetermined manner.

In this case, since the soil is slurried by the exfoliating material 25, the feeding to the next stage treatment through the hose or the pipe is performed smoothly with little flow-through resistance.

It should be noted that the soil discharge pump 7 performs homogenizing mixing in the process to better promote slurry formation.

In the process, the stripping material 25 is a kind of gas-liquid mixture fluid containing gas-liquid and gives a smooth stripping action to the adhered soil, and the shank 2, the spiral fin 3, and the hose, The pipe is not mechanically damaged or distorted, and the adhering soil is peeled and removed while being smoothly subdivided by the impact force of the fluid.

Since the stripping material has a large mass by stirring and mixing a fluidizing agent such as a surfactant with water, the excavating soil adhered to the shank 2 or the spiral fin 3 can be destroyed without fail. Can be crushed and removed by peeling,
Since it is a gas-liquid mixed fluid, it has no mechanical action to give damage, deformation, strain or the like to the shank 2 and the spiral fin 3.

After the crushing action and the removing action of the adhered soil on the shank 2 and the spiral fin 3, the shank 2 and the spiral fin 3 show a kind of liquid wet state due to the water content. In order to take it out, it acts so as to have a soil adhesion preventing function of the excavated soil accompanying the next excavation to the shank 2 and the spiral fin 3, a smooth stripping function, and a stripping function.

Then, the shank 2 of the held excavated soil,
As shown in FIG. 4, the stripping removal action on the spiral fin 3 is broken by jetting of the stripping material 25 from all the jet nozzles 10, 10 ... Colliding with the surfaces of the shank 2 and the spiral fin 3. By performing the crushing action and the peeling removal action, the excavated soil rising from below is surely peeled off in the zone of the cover frame 8.

Next, in the embodiment shown in FIG. 5 to FIG. 7, the jet nozzle 10 for ejecting the soil removing material 25 in the gas-liquid mixed state containing the gas-liquid to the shank 2 and the spiral fin 3. To the rotation zone of the spiral fin 3 and curved in an arc shape to remove the stripping material chamber 9
', Which is provided inside and positively ejects the stripping material 25 in a gas-liquid mixed state containing gas-liquid to the spiral fin 3 and the shank 2 to more effectively crush the excavated soil, and
This is an aspect in which stripping is performed.

Each of the above-described embodiments is a basic mode in which the excavated soil attached to the auger is effectively stripped from the auger in the basic process of forming a hole for the ground. However, the embodiment shown in FIG. 8 shows this as a mode in which a soil cement column is constructed and formed in the ground by the above ground mixing displacement method, and the leader 28 of the carriage 27 set in a predetermined portion of the soft ground is set.
The driving device, the static pressure applying device 29, and the swivel joint 30 are provided on the auger 1 (either a single type or a multi-axis type is acceptable) penetrating the cover frame 8 to form a hole 31. Then, the excavated soil is discharged, mixed with the stripped soil from the stripping plant A in a slurry state, supplied to the sediment hopper 34 of the batcher plant 33 via the transport pipe 32 by the soil discharge pump 7, the cement 35, and , And mixed with water in a continuous mixer 36 as a modified soil in a slurry state and stirred, and a modified hose pump 37 transports the hose 3
8 through the swivel joint 30 through the internal passage of the shank 2 into the drilling hole 31 to replace excavated soil with improved soil to form a soil cement column. Is a process of feeding the soil from the soil discharge pump 7 to the batcher plant 33, and the excavated soil adhering to the shank 2 of the auger 1 and the spiral fin 3 is stripped off from the soil material plant A as in the above-described embodiments. The stripping material 25 in the state is crushed and stripped reliably and smoothly. Therefore, the soil removal is a finely divided soil, and the fluid of the soil removal material 25 is mixed to form a slurry. , And in the process of being fed to the batcher plant 33 in the transport pipe 32, the friction resistance is reduced as much as possible and the feeding is smooth, and the soil discharge pump 7 or Feeding prevent wear and damage to the pipe 32,
Further, the improved soil pump 37, the pressure feed hose 38, and
Also in the transportation of the improved soil in the swivel joint 30, since it is the homogenized slurry as described above, the frictional resistance is small and the transportation is smooth.

Therefore, even in this embodiment, stripping,
Also, the fluidity of the improved soil is improved, pumping is performed smoothly, stripping and mixing of cement with cement can be done easily, and the improved soil can be easily filled into the drilled holes, which improves reliability. A highly accurate soil cement column will be formed.

Of course, the embodiment of the invention of this application is not limited to the above-described embodiments. For example, the auger spiral fin is not limited to a continuous screw, but may be a partially cut scoring screw. Various modes such as a partial spiral fin may be adopted.

Further, in the case of a multi-axis auger in terms of design change,
Needless to say, it is possible to form a multi-panel such as 4 or 5 stations.

Needless to say, the construction symmetry can also be applied to ground drilling for forming a continuous underground wall or the like.

[0033]

As described above, according to the invention of the present application, basically, in the process of excavating the ground by using an auger and forming a hole in the formation of an underground structure such as foundation piles when improving soft ground, a spiral of the auger is formed. An excellent effect is obtained in that the fin and the excavated soil adhering to the shank can be reliably and smoothly stripped by removing the excavated soil, and that drilling can be performed as planned.

As the exfoliating material for excavated soil attached to the auger, a mixture of a fluidizing agent such as a surfactant and water, and a gas-liquid containing bubbles through gas transportation by high-pressure air or the like. Since it can be ejected to a shank or spiral fin with a high dynamic pressure in a mixed fluid state, the excavated soil firmly adhered to the shank or spiral fin can be subdivided smoothly and completely with the ejection energy due to the dynamic pressure. Not only can it be removed, but the surface of the shank or spiral fin is not damaged, distorted, or deformed.

Further, since the stripped material in a mixed state is mixed with the subdivided excavated soil discharged in the stripping process, it is easy to transport the soil and mix the soil with the improving material such as cement. It also has the effect of giving good fluidity to the feedback of the improved soil to the drilling holes.

Furthermore, the exfoliation material adheres to the shank or spiral fin of the auger which has been exfoliated during the excavation process in a liquid wet state, so that the excavation soil can be prevented from adhering to the next excavation.

[Brief description of drawings]

FIG. 1 is a system schematic diagram of a basic embodiment of the invention of this application.

FIG. 2 is a partial cross-sectional view of the same.

FIG. 3 is a partial vertical sectional view of the same.

FIG. 4 is a schematic side view of the spouting process of the stripping material in a gas-liquid mixed fluid state with respect to one auger.

FIG. 5 is a schematic cross-sectional view of another embodiment.

FIG. 6 is a partial vertical sectional view of the same.

FIG. 7 is a partial plan sectional view of the same.

FIG. 8 is an overall schematic diagram of a plant according to another embodiment.

[Explanation of symbols]

 32 Drilling 1 Auger 3 Spiral fin 25 Stripping material 23 Fluidizer tank 16 High pressure air tank 9 Stripping material chamber 10 Jet nozzle 14 Stripping material pressure feeding pipe 19 Stripping material tank 16 High pressure gas tank 8 Cover frame A Stripping Earth material plant

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000149206 Osaka Waterproof Construction Co., Ltd. 7-6, Eizashi-cho, Tennoji-ku, Osaka-shi, Osaka (71) Applicant 000140292 Okumura-gumi Co., Ltd. 2, Matsuzaki-cho, Abeno-ku, Osaka-shi, Osaka 2-2 (71) Applicant 000205328 Osaka Cement Co., Ltd. 1-4-4 Dojimahama, Kita-ku, Osaka-shi, Osaka (71) Applicant 000146928 Morimoto Gumi Co., Ltd. 4-11 Yuhigaoka-cho, Tennoji-ku, Osaka-shi, Osaka ( 71) Applicant 000140694 Kato Construction Co., Ltd. Kanie-cho, Kaifu-gun, Aichi Large area, Kanie, Shindenji, 19-1 (71) Applicant 000148346 Zenkougumi Co., Ltd. 2-2-1 Nishihonmachi, Nishi-ku, Osaka-shi, Osaka (71) ) Applicant 390036515 Konoikegumi Co., Ltd. Konohana-ku, Osaka-shi, Osaka 4-3-55 (71) Applicant 390036504 Tokyo Metropolitan Government 8-14-14 Ginza, Chuo-ku (71) Applicant 000004123 Nippon Steel Tube Co., Ltd. 1-2-2 Marunouchi, Chiyoda-ku, Tokyo (72) Susumu Murakami 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka Incorporation company Okumura Gumi (72) Inventor Tsuneo Wakita 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka Co., Ltd. Okumura Gumi (72) Inventor Masaaki Ohinata 7-6 Baishashi-cho, Tennoji-ku, Osaka Osaka Waterproof Construction Co., Ltd. In-house

Claims (6)

[Claims] 1. A soil treatment method for a construction auger in which soil attached to fins of an auger excavated from the ground is removed by a fluid jet, in a soil-exhaust portion of the auger, which is a gas-liquid mixed fluid state. A method for treating soil of an auger for construction, which comprises jetting a jet of stripping material against an auger fin to collide with the auger fin. 2. The stripping material of the gas-liquid mixed fluid is pressure-fed by a high-pressure gas as the stripping material obtained by mixing and stirring a fluidizing agent with a liquid. Soil treatment method for construction auger. 3. The method for treating soil of an auger for construction work according to claim 1, wherein the fluidizing agent contains a surfactant. 4. An apparatus used for a soil treatment method for a construction auger for removing soil attached to fins of an auger excavated in the ground, wherein a jet nozzle is provided close to the auger and stripping material is provided. An auger soil treatment apparatus for construction work, which is connected to a pipe for pressure feeding, and a stripping material tank and a high-pressure gas tank are connected to the pressure feeding pipe. 5. The soil treatment device for an auger for construction work according to claim 4, wherein the jet nozzle is attached to a cover frame surrounding the auger. 6. A soil treating apparatus for a construction auger according to claim 4, wherein the augers are formed as multi-axis augers juxtaposed to each other.