JP2627375B2 - Large diameter hard ground improvement device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a ground improvement body constructed mainly for the purpose of improving soft ground, foundations of building structures, and the like, and more particularly to a large-diameter and strong ground improvement body forming apparatus.

[0002]

2. Description of the Related Art Conventionally, a ground improvement method by spraying a curing agent has been developed through various trials and errors. Especially,
The conventional construction method does not have a drilling blade or a stirring blade, but in order to make the construction method more effective, the present inventor has devised a ground improvement device provided with a stirring blade. further,
In the invention relating to the apparatus of the same application (serial numbers 91081 and 91082), a stirring function is added as an additional function, and a so-called digging wing having a digging function as a main function is provided. The connection has solved the problems of the past, and has developed an epoch-making hard ground improvement body.

[0003]

However, the invention does not include the connection between a plurality of drilling wings and a plurality of injection nozzles because of the invention based on the connection between a single specific shape or a telescopic drilling wing and the injection nozzles. That is, if a plurality of effects are obtained from a single object, the effect is inevitably increased in proportion to the plurality of effects. It is an object of the present invention to first provide an improved method or device. It is also an object to maintain the balance of the rotating injection rod. further,
An object of the present invention is to make up for the disadvantages of the basic ground improvement body forming apparatus according to the simultaneous application and to further develop a large-diameter uniform and hard ground improvement body that has taken one step further.

[0004]

A hardening agent injection pipe 11 is built in, and a hardening agent injection nozzle 12, a monitor unit 17, a bit 15, and a drilling wing 14 communicating with the hardening agent injection pipe 11 are installed. With hardener injection rod 10 having
In the improved body forming apparatus, the excavating wing 14 is provided with a rod longitudinal axis.
Inserted into the injection rod 10 so as to penetrate at right angles,
A large-diameter hard ground improvement body forming apparatus characterized by providing the injection nozzle 12 above the excavation wing 14 .

[0005]

The excavator blade penetrates in the direction perpendicular to the longitudinal axis of the rod.
So that it is firmly
It is provided on the input rod 10. Further, the injection nozzle 12
Since it is provided to be located above the excavation wing 14,
The injection pipe 11 communicating with the nozzle 12 is also located above the drilling wing 14.
The mechanical strength of the insertion portion 16 is reduced
11 is not inhibited. Drilling in this way
The wing 14 will have sufficient strength to withstand excavation work.
You.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment according to the present invention. That is, the injection rod 10 having the bit 15 and the injection pipe 11
At the top of the bit 15 and the injection rod 10
Has a plurality of excavating wings 14 which are firmly fitted and installed in the lower part of the excavator. Further, according to this figure, the injection pipe 11 penetrating through the substantially central portion from above the injection rod 10 extends to a location located above the excavation wing 14. The injection pipe communicates with the injection nozzle 12 so as to correspond to the horizontal line of each excavation wing above the excavation wing 14. That is, a plurality of injection nozzles 12 are provided on the side wall of the injection rod 10, since that is installed such accompany each drilling blade 14, the curing agent is pumped through the injection tube 11, the respective drill blade 14 Upper position
In this case, high-pressure injection is performed from the injection nozzle so as to follow each of the excavation wings. In addition, since it is impossible to provide the injection nozzle 12 at the same position as the excavation wing 14 unless a hardener is injected from the so-called tip of the blade as in the above-described conventional technique,
It is generally desirable that each of the injection nozzles is installed at a position above each of the plurality of digging wings 14. Note that the arrangement of the plurality of injection nozzles 12 above the plurality of digging wings 14 is the most ideal configuration in view of the necessity of firmly inserting the plurality of digging wings 14 into the injection rod. It is. Since the plurality of excavating blades 14 also have an excavating function, the excavating blades 14 have detachable bits according to geological conditions and applications .

FIG. 2 shows a second embodiment of the present invention, in which a plurality of extendable excavating wings 14 according to the simultaneous application (reference number 91082) are provided. This expansion / contraction function can be solved by applying a conventional technique used for an aircraft wing, a vehicle antenna, or the like. However, due to the necessity of firmly installing the excavation wing 14 on the injection rod 10, the injection pipe 11 terminates above the excavation wing 14, and therefore, the injection nozzle 12 also moves above the excavation wing 14. It is most desirable to provide the same as in the above embodiment. The insertion portion 16 in which the excavation wing 14 is installed includes:
This is because it is controlled by the insertion device. The insertion portion 16
Is usually located above the monitor unit 17. However, any lower part of the injection rod 10 may be used as long as the injection pipe 11 and the injection nozzle 12 are not affected.

On the other hand, the expansion and contraction function of the plurality of excavating wings 14 makes it possible to construct a ground improvement body quickly and accurately according to the geology. That is, when a hard material is generally cut, a predetermined blade is rotated at a high speed to achieve an object.
This is because, by rotating the drill according to the object, more accurate excavation can be performed. The excavation mode expands and contracts the excavation wing according to the target ground as disclosed in a separate matter (reference number 91082), but the use of a plurality of excavation wings achieves the purpose more from the relationship with the rotation speed than the above description. Becomes easier.

FIG. 3 is a schematic plan view of the second embodiment according to FIG. In this case, it should be noted that one is provided with the injection nozzle 12 so as to follow the excavation wing 14 in the rotational direction, and the other is provided with the injection nozzle 12 in a form preceding the excavation wing 14. That is. That is, simultaneous applications (reference numbers 91081 and 9108)
By combining the two inventions according to 2), a synergistic effect of the functions and effects of the two inventions, which are completely different from each other, is expected. Therefore, an operational effect that is one step further from the two basic inventions can be obtained. In the figure, the arrow during the diffusion of the curing agent indicates the direction of injection of the curing agent, and the arrow outside the figure indicates the direction of rotation of the injection rod 10 (the same applies hereinafter).

FIG. 4 is a schematic plan view of a third embodiment according to the present invention. That is, a state in which the injection nozzle 12 is installed so as to follow the excavation wing 14 with respect to the rotation direction of the injection rod 10 is shown in a symmetrically installed state. This is a single device of the same device, which is made into a plurality of devices.
1081). FIG. 5 shows a fourth embodiment according to the present invention. That is, the injection nozzles 12 are provided so as to sandwich the plurality of excavating blades 14 from both sides. That is, the injection nozzle 12 is characterized in that the injection nozzle 12 is installed in a manner that follows and follows the excavation wing 14 in the rotation direction of the injection rod 10. It can be said that all the effects of the injection nozzle preceding or following the excavation wing 14 are utilized.

[0011]

According to the present invention, a large-diameter, uniform and tough ground improvement body can be provided more quickly and more reliably than the so-called prior art and prior art. Especially with this device
Inserts the excavation wing into the injection rod and connects the injection nozzle to the injection rod.
By shall be the configuration in which the upper portion of the drilling wing, 該掘Kezutsubasa
Can be more firmly fixed to the injection rod
Was. Further, since the present apparatus has a plurality of excavating wings, the balance of the injection rod main rest is maintained, and stable construction work can be performed. On the other hand, the apparatus has a wide application range and can be used for multipurpose ground improvement work. For example, it is particularly effective for increasing the foundation support capacity of a building, preventing land subsidence, preventing cuts, excavation slopes from slipping, and preventing the surrounding ground from being displaced due to nearby construction.

[0012]

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a first embodiment of the present invention.

FIG. 2 is a schematic sectional view showing a second embodiment of the present invention.

FIG. 3 is a schematic plan sectional view of the second embodiment.

FIG. 4 is a schematic plan sectional view according to a third embodiment of the present invention.

FIG. 5 is a schematic plan sectional view of a fourth embodiment according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Injection rod 11 Injection pipe 12 Injection nozzle 13 Hardening agent 14 Drilling wing 15 Bit 16 Insertion part 17 Monitor part

Claims (1)

(57) [Claims] A hardener injection nozzle (12), a hardener injection nozzle (12), a monitor (17), and a bit (15) that have a built-in hardener injection pipe (11) and communicate with the hardener injection pipe (11 ).
And a hardener injection rod (1) having a drilling wing (14).
0) In the ground improvement body preparation device provided with 0), the excavation wing (14) penetrates in a direction perpendicular to the longitudinal axis of the rod.
The drilling wing (14).
A large-sized nozzle having an injection nozzle (12) provided at an upper part thereof.
Equipment for improving the diameter of hard ground.