JPH0941358A - Method of agitating injecting construction of ground hardener and equipment thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase density and gain a sure infection region by the combination use of blade-body agitation and jet agitation because a section, to which a hardener is not injected, is generated to the lower section of a blade body and a special counterplan must be considered to the formation of the section, to which the hardener is not injected, and a section by the blade-body agitation and a section by the jet agitation are not united sufficiently when an injection nozzle is set at the front end of an agitating blade. SOLUTION: A blade body 2 extended to the side is implanted to the side wall section of an injection rod 1, and a grooved guide nozzle 21 is formed to the lower section of the blade body along the blade body while a hardener jet supply nozzle 3 is set to the base section of the guide nozzle. A hardener jet from the jet supply nozzle 3 is introduced up to the front end of the blade body 2 while a hardener is also injected to the lower section of the blade body.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to the stability of soft ground,
The present invention relates to a method for injecting a ground hardening material by using a stirring blade planted on a rod and a high-pressure jet of the ground hardening material, which are used for the purpose of supporting the foundation of a structure, supporting the ground, and the like, and a device therefor.

[0002]

Conventionally, the injection of the ground hardening material using both the stirring blade and the high-pressure jet is performed by setting an injection nozzle at the tip of the stirring blade and completely injecting inside the blade until the jet is injected. Or a jet nozzle independent of the blade is set on the side wall of the rod, and the stirring by the blade and the stirring by the hardening material jet are superposed afterwards.

Therefore, when the injection nozzle is set at the tip of the stirring blade, there is a portion below the blade body where the hardening material is not injected, and special measures must be taken against this, The result was that the body-stirred portion and the jet-stirred portion were not sufficiently fused.

Further, when an injection nozzle independent of the blade body is set on the side wall of the rod, if the positional relationship between the blade body and the injection nozzle is too close, the jet collides with the blade body and dissipates, resulting in the injection energy. As a result, the problem that the combined use of blade stirring and jet stirring is lost if the distance is too long.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention solves the above problems by providing a groove-shaped guide nozzle at the bottom of a blade body that is planted in a rod side wall. Is provided
By setting the injection nozzle at the base of the guide nozzle,
The hardened material jet to be injected is directed by the groove of the guide nozzle, and the jet energy of the hardened material jet is protected up to the tip of the blade by the groove-shaped guide nozzle, so that the efficiency of the jet reaching energy is improved. .

Further, by making the cross-sectional shape of the groove hole constituting the guide nozzle into a pointed shape, the jet shape of the hardening material jet is corrected and the injection of the lower portion of the blade and the agitation of the blade are integrated to achieve hardening. The wood and surrounding soil were thoroughly agitated to give a dense basic structure to the hardened material layer to be formed.

Further, since the guide nozzle at the lower part of the wing has a groove-shaped cross section, such as a semi-circular shape, a semi-circular shape, or a polygonal shape, and the lower side is open, the ground hardening material is also formed at the lower part of the wing body. While the jet is directly injected, the jet flow is guided to the nozzle groove depending on the construction environment to maintain the jet energy to the tip of the blade body, so that the same jet effect as when the hardening material jet is jetted from the tip of the blade is obtained. I chose

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. An injection rod 1 is supported by a drive operating unit 4 having a mechanism for advancing, retracting, and rotating, and is given operations such as descending, ascending (advancing and retracting), and rotating.

On the side wall of the tip portion of the injection rod 1, a blade body 2 having a groove-shaped guide nozzle 21 formed in the lower portion is laterally extended and planted, and is guided to the base portion of the guide nozzle 21. A jet flow supply nozzle 3 for supplying a curable material jet to the nozzle is set. The inside of the injection rod 1 has an arbitrary path structure (not shown) such as an air jet or a slime suction outside the hardening material supply path.

The shape of the wing body 2 is a blade shape, a cover shape, or a brace shape, depending on the condition of the target ground.
The hardening material jet and the soil ejected from the lower part of the guide nozzle 21 are cut or stirred.

An air inlet 31 is opened around the jet supply nozzle 3 for supplying a hardening material jet from the rod body 1 to the guide nozzle 21, and when the ground hardening material is supplied into the guide nozzle 21 at a high pressure, The air from the air inlet 31 is drawn into the jet stream, and the jet stream jetted from the jet stream supply nozzle 3 into the guide nozzle 21 and the jet stream jetted from the tip of the blade body 2 are formed into an air-bonded jet stream.

Since the lower portion of the guide nozzle 21 is open, the hardening material jet supplied into the guide nozzle 21 has a pointed shape, a semicircular shape, a polygonal shape, or the like, depending on the sectional shape of the guide nozzle 21. The shape is corrected, and it is jetted below the blade body 2 in accordance with the property of the target ground, and a hardening material stirring injection layer is formed in that portion in combination with the function of the blade body.

The injection rod 1 thus constructed is driven and propelled toward the target ground G by the drive operation unit 4,
Are spliced to each predetermined length and is driven inserted to a predetermined depth, 100kgf / cm ² ~600kgf / cm injected at ² of the high-pressure rod 1
The ground hardening material is supplied to the rod 1, and the rod 1 is rotated while jetting a high-pressure hardening material jet from below and the tip of the blade body 2, and is further raised or retracted.

Since the blade body 2 in the embodiment is formed into a blade shape and the guide nozzle 21 has a pointed cross-sectional shape, the high-pressure hardening material jet from the jet flow supply nozzle 3 has a pointed shape. While being diffused downward from the top to the formation of the ground in a triangular shape and being stirred by the blade-shaped blade body 2, the upper layer jet is jetted further forward from the tip of the blade body 2 while perforating and cutting the outer ground. The ground is agitated to form a large-diameter hardened material injection layer.

In this embodiment, the hardening material injection layer is formed in the vertical direction. However, when the hardening material injection layer is formed in the horizontal direction, the hardening material injection layer is formed in the same manner, and if necessary, these hardening material injection layers are formed. It is constructed in parallel to form a support lining layer and the like.

[0016]

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and is an enlarged perspective view showing a main portion by cutting out a part of a tip portion of an injection rod.

FIG. 2 is an overall explanatory diagram showing a construction situation according to the present invention

FIG. 3 is a schematic cross-sectional view of the main part of the tip, which schematically shows the injection rod of the present invention.

[Explanation of symbols]

 1 injection rod 2 blade-shaped wing body 21 guide nozzle 3 jet supply nozzle 31 air inlet 4 drive operation unit 5 swivel G target ground

Claims (3)

[Claims] 1. An injection rod provided with a groove-shaped guide nozzle along the blade at the lower part of the blade extending laterally of the injection rod and installed in the side wall, and is inserted into the target ground, At a predetermined depth, the ground hardening material injection layer is formed along the trajectory of the hardening material jet by rotating and retracting the rod while jetting the ground hardening material as a high-pressure jet from the jet flow supply nozzle set at the base of the guide nozzle. Ground hardening material injection method characterized by 2. A digging mechanism is provided at a tip portion, a side wall-extending wing body is planted, a groove-shaped guide nozzle is provided along the wing body at a lower part of the wing body, and a guide is provided. A ground hardening material injection device in which a ground hardening material injection rod having a hardening material jet supply nozzle set at the base of the nozzle is supported by a drive operation unit having a mechanism for advancing, retracting, and rotating. 3. The ground hardening material injecting device according to claim 2, wherein the cross-sectional shape of the slot forming the guide nozzle is formed into a pointed shape.