KR19980082227A - Two-component hardener injection method and its apparatus - Google Patents

Abstract

The present invention relates to a two-liquid cured material injection method and an apparatus thereof in which a two-liquid crystal hardened material is injected into a target ground to improve a soft ground, and to form a support layer and an index layer in the ground.

The present invention provides an injection pipe in which a nuclear injection nozzle and two annular nozzles are polymerized in a concentric manner on the tip side wall, and three separate flow paths are installed to communicate with the nuclear nozzle and two annular nozzles, respectively. From the place where it reaches in the predetermined depth, the hardened | cured material A liquid to the flow path which communicates with a nuclear nozzle, the hardened | cured material B liquid to the flow path which communicates with an intermediate annular nozzle, and the clear water is flowed at high pressure, respectively. It is a two-component hardening material injection method and its apparatus, characterized by forming a hardened layer on the injection tube trajectory by moving the injection tube in the direction of extraction by rotating the injection tube by being injected by high speed jetting.

Description

Two-component hardener injection method and its apparatus

TECHNICAL FIELD The present invention relates to a two-component curing agent injection method and apparatus for improving a soft ground and forming a support layer or a water-stop layer in the ground by injecting a two-component curing agent into the target ground.

Conventionally, when the improvement of the soft ground, the composition of the ground support layer and the index layer of the ground, especially the composition of the large-diameter cylindrical columnar hardening layer, are required, the high-pressure injection is performed by incorporating a one-component hardening material into the air. By increasing the reach distance of), a large diameter of the cured layer can be achieved.

However, in the case of a two-component hardener, when one is contained in the air and sprayed at high pressure, one liquid of the lower viscosity is airlifted and discharged, and the balance of the two liquids is broken, so that a predetermined effect cannot be obtained. Its use has become impossible.

In addition, since two-component hardeners have problems of packing density and permeability, they cannot be used in an injection method requiring a large diameter of the hardener layer, and the hardener used therein is a slow cohesiveness (hereinafter, a "completeness"). It is limited to the one-component hardening | curing material of the

The hardened material injection layer using the above-mentioned one-component hardened | cured material has long hardening time, and when it inject | pours into the support layer of an excavation site, etc., it is very difficult to advance construction in accordance with an excavation speed.

In addition, if excavation is performed before sufficient hardening is performed, there is a problem that the supporting effect may not be obtained and may lead to serious accidents.

Conventionally, it is not possible to use the effect material of rapid coagulation (hereinafter referred to as purity) for Jibo rehabilitation by injection, especially the lid part injection, since the purity hardening material is two-liquid. Since it hardens | cures for a short time by mixing two liquids, it becomes a big cause that the injected hardened | cured material hardens before fully penetrating and filling, and produces a roughness in an injection layer, and cannot obtain a homogeneous hardened layer.

In addition, the injection of the purity hardening material may be the center of the permeation is clearly made through the low pressure injection without breaking the arrangement between the soil particles in order to increase the filling density.

1 is an overall side view showing a construction situation showing an embodiment of the present invention.

2 is an enlarged longitudinal sectional view showing the main part structure of the injection pipe.

3 is a front view of the polymerization nozzle.

* Description of the symbols for the main parts of the drawings *

1: injection pipe main body 2: operation drive mechanism

3: swivel 4: basic support

5: Injection pipe operation mechanism 6: Hard material pressure pump device

7: clear water pressure pumping device 11: 1 euro

12: 2 euros 13: 3 euros

21: nuclear nozzle 22: medium circular nozzle

23: Outer annular nozzle 31: A liquid feed hose

32: B liquid pressure hose 33: Clear water pressure hose

G: Target ground

The present invention provides a polymer injection nozzle in which a core nozzle and two annular nozzles are polymerized concentrically on the tip side wall, and three flow paths separated from each other are connected to the nuclear nozzle and two annular nozzles, respectively. The injection tube is inserted into the target ground, where the water reaches the predetermined depth, the hardener A liquid into the passage communicating with the nuclear nozzle, the hardener B liquid into the passage communicating with the intermediate annular nozzle, and the clear water into the passage communicating with the outer annular nozzle. By pressure feeding at high pressure, it is possible to cope with the above problems by moving the injection pipe in the direction of extraction while rotating the injection pipe by forming a hardened layer on the injection pipe trajectory by jetting at high speed from the polymerization injection nozzle.

In other words, by installing an annular clear water jet nozzle surrounding the nozzle to which the purity hardening material is injected, and incorporating the purity hardening agent fraction into clear water to inject high pressure, the diffusion of the hardening material fraction is prevented and at the same time, the clear water By using the crushing force of the classification to increase the reach and filling density of the reach.

The clear water sprayed by the high pressure from the outer annular spray nozzle combines the hardener A liquid high-pressure sprayed from the core nozzle and the hardened material B liquid high-pressure sprayed from the intermediate annular spray nozzle to cut the surrounding soil in accordance with the rotational movement of the injection pipe which entangles the fractionation. In order to clean up the soil particles, the mixed fractionation of the A liquid and the B liquid is mixed, and the homogeneous hardening material filling is performed by the large stirring mixing effect due to the extraction movement of the injection pipe.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described by drawing. Numeral 1 denotes an injection tube having its 1 channel 11, its 2 channel 12, and its 3 channel 13, each of which is formed by condensing a core concentrically on the distal end wall of the injection tube 1. The nozzle 21, the intermediate annular nozzle 22, and the outer annular nozzle 23 communicate with each other and are opened.

The injection pipe 1 has a swivel 3 at its rear end and is connected to the hoses 31, 32, 33 which contact the material supply unit via the pressure pump devices 6, 7 and the foundation pedestal 4 It is supported by the injection tube operating mechanism 5 installed above.

The injection tube operating mechanism 5 has an operation drive mechanism 2 for changing the rotational movement, the forward retreat or the inclined downward angle of the injection tube 1, and further excavates and propels a predetermined angle with respect to the target ground, thereby rotating the movement. It is supposed to retreat.

In addition, the pressure pump device 6 connected to the hoses 31 and 32 to impart a pressure force to the injection material is conventionally a pump device for pumping a relatively high viscosity material that can be used for the two-component hardener material pump. In addition, the pressure feed pump device 7 which connects to the hose 33 and imparts pressure force to the injection material is a high pressure pump device that secures the output of the clean water fractionation.

The injection pipe 1 installed as described above is propelled and inserted into the target ground G, and at the point where the predetermined depth is reached, the liquid A in the one flow path 11, the liquid B in the two flow paths 12, The clear water is pumped to the three flow paths 13 at an ultra-high pressure of about 200 kg / cm 2 to 500 kg / cm 2, respectively, and sprayed from the polymerization nozzles as a high-speed mixing fraction.

In addition, depending on the construction situation, the clear water may be sprayed at a higher pressure than the hardener A liquid and the B liquid, and the hardener A liquid and the B liquid may be wound up by clear water classification.

For example, the liquid A is injected into one flow path 11 and the liquid B is flown into the two flow paths 12 at a pressure of about 20 kg / cm 2 to 30 kg / cm 2, respectively, and the nuclear nozzle 21 and the intermediate annular nozzle are respectively fed. At the same time as spraying from (22), the clear water is injected into the three flow passages 13 at a high pressure of about 200 kg / cm 2 to 500 kg / cm 2 and sprayed from the outer annular nozzle 23, whereby the annular classification by the clear water is carried out. The mixture of the A liquid and the B liquid mixed fractionation from the nucleus nozzle 21 and the intermediate annular nozzle 22 is combined, the ultrafast fractionation is carried out, the surrounding soil is cut, and this is accompanied by the rotational operation of the injection pipe 1 and stirred.

In addition, even if the ultra-high pressure as described above is not used, when the injection pressure of the clear water becomes higher than the injection pressures of the liquids A and B, the inclusions are generated and the pressure can be adjusted according to the injection environment.

As such, from the high pressure injection of the combined flow of liquid A, liquid B and clear water, the injection tube is rotated, the liquid is retracted in the direction of extraction, and the two-component hardening material is injected into the target ground to form a cured layer in a cylindrical shape. Parallel this as necessary.

The present invention has the effect as described above, and can form a high strength homogeneous cured material injection layer that is cured in a short time by the purity hardened material. Therefore, it can be utilized for any ground of the vein and the emergency index rehabilitation, and it is possible to reduce the unnecessary time required for conventional work such as the curing waiting time, and to greatly increase the work efficiency.

Claims (3)

A polymer injection nozzle is installed on the tip side wall of which the core nozzle and two annular nozzles are concentrically polymerized, and three separate flow paths are inserted to insert an injection tube communicating with the nuclear nozzle and the two annular nozzles in the target ground. From the place where the predetermined depth is reached, the hardened material A liquid into the flow passage communicating with the nuclear nozzle, the hardening material B liquid into the flow passage communicating with the intermediate annular nozzle, and the clear water are fed at high pressure to the flow passage communicating with the outer annular nozzle, respectively. 2. A two-component curing material injection method comprising: forming a hardened layer on an injection tube trajectory by moving in an ejection direction while rotating the injection tube from being injected as a high speed jet. The method of injecting a two-component curable material according to claim 1, wherein the clear water is injected from the outer annular nozzle at a pressure higher than that of the hardener A liquid in the core nozzle and the hardener B liquid in the intermediate annular nozzle. The injection mechanism is provided on the distal end sidewall of the polymer injection nozzle in which the core nozzle and the two annular nozzles are polymerized concentrically, and three flow paths separated from each other are connected to the nuclear nozzle and the two annular nozzles respectively. The support hose, which is supported on the basic pedestal having the forward and backward mechanism, and is connected to the passage communicating with the core nozzle and the intermediate annular nozzle, is connected to the material tank of the hardener A liquid and the liquid B through the central pump. And a pressure feed hose in contact with a flow path communicating with an outer annular nozzle are respectively connected to a clear water material tank through a high pressure pump.