JP3220113B2 - Ground hardening material injection method and its equipment. - 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 and an apparatus for injecting a ground hardening material for improving soft ground and for forming an underground support layer and a waterproof layer, and more particularly, to a method for generating muddy water slime as industrial waste. The present invention relates to a method for injecting a ground hardened material and a device for forming a high-quality hardened material injected layer by reducing the influence of the diffusion and infiltration on the surrounding ground as much as possible.

[0002]

Conventionally, injecting a ground hardening material for improving soft ground and for forming an underground support layer and a waterproof layer has been carried out by extending the reach of the jet and increasing the diameter of the hardened layer. Ultra-high pressure of the hardener injection pressure has been promoted for the main purpose.

[0003] Along with this, the injection pressure of the hardening material increases the pressure in the ground of the target ground, and there has been a problem that the ground is raised and a large amount of excess slime is generated. Therefore, slime suction holes are provided in the injection rod to adjust the ground pressure.

[0004] However, a large amount of excess slime becomes industrial waste and requires a great deal of cost for its disposal. In addition, since it is difficult to completely treat industrial waste, the generation of excess slime itself leads to environmental pollution. It is becoming a situation that may be happening.

[0005] Further, as the demand for injection into the target ground at a high depth increases, the lengthening of the injection rod causes a reaction force in the operation such as rotation, and the power is reliably transmitted to the operation of the rod. Some problems are becoming more difficult.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for reliably discharging the soil to be replaced by a hardening material to the ground, and supporting a core space formed by the soil by a ring blade set on a rod. It absorbs the operation reaction force of the long rod and absorbs the injection hardening material and the hardening material injection pressure into the core gap to reduce the side pressure, thereby reducing the influence on the surrounding ground. The purpose of the present invention is to develop a method and an apparatus for injecting a ground hardening material capable of sufficiently securing the formation effect of a layer and a waterproof layer.

That is, a screw auger section is provided above a monitor section having an injection nozzle, and ring wings which surround the screw auger section and are supported on the outer periphery of the auger section are provided. While ejecting water from the tip injection nozzle and air from multiple ejection holes on the rod side wall, the injection rod provided with the ejection hole is rotated and lowered into the target ground, and inserted. A high-pressure injection of a hardening material from a nozzle is performed while ejecting air from a plurality of ejection holes on a side wall of a rod, while rotating the injection rod in a removal direction while rotating the injection rod to form an injection rod trajectory along a jet stirring path by the rotation of the rod. Inject hardener.

First, when the injection rod is lowered while rotating the injection rod on the target ground while jetting water from the tip injection nozzle and air from the plurality of injection holes in the rod side wall, the screw auger portion is loosened by the water and air. The target ground is excavated and lifted to the rod insertion port by the air blown out from the rod side wall blowing hole at the top, and at the same time, a core gap supported by the descending ring blade is formed.

When a predetermined depth is reached, the hardening material is injected at a high pressure from the tip injection nozzle, and the injection rod is moved in the removal direction while rotating while rotating the injection rod while emitting air from a plurality of injection holes in the rod side wall. The rod supported by the core cavity absorbs the operating reaction force and operates reliably, while the injection hardening material and the hardening material injection pressure are absorbed by the core cavity, and excess slime is ejected from the rod side wall injection hole. As a result, the material is lifted to the rod insertion port to form a hardened material injection layer in a certain area.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an injection rod, and a monitor 2 is mounted at the tip of the injection nozzle 21 and 22 which are capable of injecting a plurality of injection materials by switching. A screw auger 3 is provided above the auger. A ring blade 4 supported on the outer periphery is set, and a plurality of jet holes 12, 12,... Spirally arranged at predetermined intervals on a side wall of a connecting rod 11 connected to an upper portion thereof. Is provided.

The injection nozzles 21 and 22 of the monitor unit 2
Is changed in accordance with the injection environment, such as opening with a step in the facing direction, or setting only the injection nozzle 21 alone, and a plurality of ejection holes 12 of the connecting rod 11 are also arranged in a spiral shape. Instead, they may simply be arranged in tandem. When the depth of the target ground is deep, a plurality of ring blades 4 are set at predetermined intervals.

The injection rod 1 has a swivel 5 at its rear end. The hose 51 communicates with a cutting material supply unit that supplies water, air, etc. via a pumping pump device. It is connected to a hose 52 communicating with a filling material supply section for supplying the material, and is supported by the injection rod operating mechanism 6.

The injection rod operating mechanism 6 is an operation drive mechanism for rotating, moving forward and backward, or changing the tilt angle of the injection rod 1.
61, which is designed to be excavated and propelled at a predetermined angle with respect to the target ground, and to be turned back.

Water or water and air are injected from the tip injection nozzles 21 and 22 at such a pressure as to loosen the diameter range of the ring blade 4 toward the target ground X by injecting the injection rod 1 thus constructed into the target ground X. When the air is blown out from the plurality of blowout holes 12, 12,... While rotating down to the target ground, the loosened surrounding soil is lifted up by the screw auger 31, which sinks the ring wing 4 and further sinks. The core air gap Y is lifted to the rod insertion port by the jet air from the plural jet holes 12.
Is formed.

When the rod 1 is inserted to the length of the first connecting rod 11, the rods 11 are successively connected thereon, and the rod is inserted to a predetermined depth. When the insertion depth is deep, the connecting rod 11 provided with the ring blade 4 is added at a predetermined interval to stabilize the driving of the rod 1.

The discharged soil discharged at this stage does not contain a hardening material unlike the slime when the ground hardening material is injected, and can be normally treated as general industrial waste. When a predetermined depth is reached, the tip injection nozzles 21, 22
The injection rod is rotated in the removal direction while rotating the injection rod while injecting air from the plurality of injection holes 12, 12,... Of the rod sidewalls.

The hardening material injected from the injection nozzles 21 and 22 pierces and agitates the surrounding soil according to the rotation of the rod and the injection pressure to form a ground hardening material injection layer Z having a predetermined diameter. Since the portion Y exists, most of the normally generated excess slime is filled and absorbed in the core void portion Y, and the generation thereof is suppressed to a minimum.

Further, when the ring blade 4 is settled, the surrounding soil and the rod insertion hole are partitioned at the time of sinking, and the air jetted from the jet holes 12, 12,... Enhances the lift effect through the core gap Y, so that surplus waste is discharged. Is a rod insertion hole, which is surely performed by the enhanced air lift effect through the core gap portion Y having a diameter larger than the rod diameter, so that the rod insertion hole does not leach to an unnecessary portion from a weak portion of the wall of the rod insertion hole.

In addition, since surplus injection is discharged through a centralized route through the core gap Y, centralized management is possible, and proper post-management is useful for preventing the occurrence of pollution. .

As described above, according to the present invention, the connecting rod 11 is sequentially removed while the rod 1 is retracted in the removing direction while the excess material is discharged, and the hardened material is injected into the target ground to obtain the cylinder. The ground hardening material injection layer Z is formed in a shape, and this is arranged in parallel if necessary.

Since the present invention is constructed as described above, it is possible to form a hardened material injection layer in a certain range even in a deep formation with a relatively low injection pressure as compared with the prior art, and it is a cause of pollution. There is an effect that generation of slime can be suppressed.

[0022]

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is an overall perspective view showing a construction state.

FIG. 2 shows an embodiment of the injection rod of the present invention, and is an enlarged vertical sectional side view of an injection part showing a hardening material injection structure at a tip of the injection rod.

[Explanation of symbols]

 1 Injecting rod 11 Connecting rod 12 Air discharging hole of connecting rod 2 Monitor part 21 Upper injection nozzle of monitor part 22 Lower injection nozzle of monitor part 3 Screw auger part 31 Screw auger 4 Ring wing 5 Swivel 51 For cutting material supply part Hose to be connected 52 Hose to be connected to the filling material supply unit 6 Injection rod operating mechanism 61 Injection rod operation drive mechanism X Target ground Y Core void Z Ground hardening material injection layer

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-11-117287 (JP, A) JP-A-3-8919 (JP, A) JP-A-3-122316 (JP, A) JP-A-51-117 81412 (JP, A) JP-A-2-304115 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 3/12 102

Claims (3)

(57) [Claims] 1. A screw auger section is provided above a monitor section having an injection nozzle, and ring wings surrounding the screw auger section are supported on the outer periphery of the auger section. While ejecting water from the tip injection nozzle and air from multiple ejection holes on the rod side wall, the injection rod provided with the ejection hole is rotated and lowered into the target ground, and inserted. A high-pressure injection of a hardening material from a nozzle is performed while ejecting air from a plurality of ejection holes on a side wall of a rod, while rotating the injection rod in a removal direction while rotating the injection rod to form an injection rod trajectory along a jet stirring path by the rotation of the rod. Injection method of hardening material characterized by injecting hardening material 2. A plurality of injection nozzles of a monitor section, wherein water is injected from one of the nozzles and air is injected from another injection nozzle when the rod descends, and a plurality of injection holes in the rod side wall are spirally arranged on the rod side wall surface. The method for injecting a ground hardening material according to claim 1, 3. A screw auger section above a monitor section having an injection nozzle, and ring wings surrounding the screw auger section and supported on the outer periphery of the auger section. A ground hardening material injection device that supports an injection rod provided with an ejection hole by a forward / backward / rotation mechanism