JPH10280386A - Method of injecting two liquid curing material and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To preclude a spout of curing material frown dispersing, and raise the expansion of a range and filling density by concentrically providing a core nozzle and two annular nozzles on the tip end wall side, inserting an injection pipe with an isolated flow passage in the ground, and injecting with high pressure curing material liquid in the core nozzle, other curing material liquid in the central annular nozzle, and clear water in the outer peripheral annular nozzle respectively. SOLUTION: The injection pipe 1 includes a first flow passage 11, a second flow passage 12, and a third flow passage 13, and each nozzle is opened respectively in communication with a core nozzle 21, an intermediate annular nozzle 22, and an outer peripheral nozzle 23 concentrically formed at the tip end side wall of an injection pipe 1 in superimposed relation. The injection pipe 1 is connected by a hose via a force-feeding pump device and supported by an injection control mechanism on the frame. The injection pipe 1 is forwardly injected in the objective ground, and when it reaches the predetermined depth, each A liquid, B liquid, and clear water is injected in the first flow passage 11, second flow passage 12, and third flow passage 13 with extra-high pressure to be spouted as a high speed involution jet. Thus, improving the range of a curing material spout and filling density.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-part hardening material injection method for injecting a two-part hardening material into a target ground to improve soft ground, and to form an underground support layer and a waterproof layer. It concerns the device.

[0002]

Conventionally, when it is necessary to improve soft ground, to form an underground support layer or a water-blocking layer, and particularly to form a large-diameter columnar hardened layer, a one-component hardening material is required. By encapsulating with air and injecting with high pressure, the reaching distance of the jet has been extended to increase the diameter of the hardened layer.

However, when a two-part curable material is wrapped in air and injected at high pressure, the one liquid having the lower viscosity is lifted by air and discharged, and the balance of the two liquids is lost and the predetermined effect is lost. The use of such a method has been considered impossible due to the lack of mention.

[0004] Further, since the two-part curable material has problems of packing density and permeability, it cannot be used for an injection method which requires a large diameter and the strength of the curable material layer. The hardening material is limited to a slow-setting one-component hardening material.

[0005] As described above, the hardening material injection layer using the slow-setting one-component hardening material has a long hardening time. When the hardening material injection layer is injected as a support layer at an excavation site, the work proceeds in accordance with the excavation speed. It was extremely difficult to do so.

Further, if excavation is performed before sufficient hardening is performed, there is a problem that a supporting effect cannot be obtained and a serious accident may be caused.

[0007] Conventionally, the quick-setting effect material has not been used for supporting lining by injection, particularly for injecting the lid, because the quick-setting curing material is a two-part material and is cured in a short time by mixing the two parts. One of the reasons is that the injected hardening material is hardened before it sufficiently penetrates and penetrates to form a dense and hardened injection layer, thereby failing to obtain a uniform hardened layer.

[0008] In addition, in order to increase the filling density of the quick-setting hardening material, emphasis has been placed on permeation through a clearance without breaking the arrangement between soil particles by low-pressure injection.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a polymerization nozzle is provided on a tip side wall in which a core nozzle and two annular nozzles are concentrically polymerized, and three isolated flow paths are provided to provide a core nozzle and two annular nozzles. The injection pipes respectively connected to the nozzles are inserted into the target ground, and when reaching a predetermined depth, the hardening material A liquid to the flow path communicating with the core nozzle, the hardening material B liquid to the flow path communicating with the intermediate annular nozzle, By pumping fresh water at a high pressure into the flow path communicating with the outer annular nozzle, the injection pipe is rotated as it is ejected as a high-speed jet while moving the injection pipe in the removal direction to form a hardened layer on the injection pipe trajectory. Thus, each of the above problems has been addressed.

That is, an annular fresh water injection nozzle surrounding the nozzle to which the instantaneous hardening material is injected is provided,
By enclosing the instantaneous hardening material jet with fresh water and injecting it at high pressure, the diffusion of the hardening material jet is prevented, and at the same time, the crushing force of the fresh water jet is used to extend the reach and increase the packing density It was done.

[0011] The fresh water injected from the outer annular injection nozzle at high pressure is injected while enclosing the hardening material A liquid injected at high pressure from the core nozzle and the hardening material B liquid injected at high pressure from the intermediate annular injection nozzle to combine the jets. The surrounding soil is cut in accordance with the rotation of the pipe, the soil particles are ordered, and a mixed jet of the liquid A and the liquid B is mixed therein. Filling is performed.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an injection pipe, the first flow path 11 and the second flow path 1
2. The three flow paths 13 are provided, and each flow path is opened by communicating with a core nozzle 21, an intermediate annular nozzle 22, and an outer annular nozzle 23 provided concentrically on the tip side wall of the injection pipe 1. .

The injection pipe 1 has a swivel 3 at its rear end, and is connected to hoses 31, 32, and 33 that communicate with a material supply unit via pressure pump devices 6, 7, and is mounted on a base 4. It is supported by the installed injection tube operating mechanism 5.

The injection pipe operating mechanism 5 includes an operation drive mechanism 2 for rotating, moving forward and backward, or changing the tilt angle of the injection pipe 1, excavating and propelling the injection pipe 1 at a predetermined angle with respect to the target ground, and rotating and retracting the same. It has become.

The pumping device 6 connected to the hoses 31 and 32 for applying a pressure to the material to be injected is a pump for pressure-feeding a relatively viscous material which has been conventionally used for the two-component hardening material. The pressure pump device 7 connected to the device and the hose 33 for applying a pressure to the injection material is a high-pressure pump device for ensuring the output of the fresh water jet.

The injection pipe 1 constructed as described above is propelled and inserted toward the target ground G, and when it reaches a predetermined depth,
Liquid A in the first channel 11, Liquid B in the second channel 12, and three channels
13 Shimizu pumped each ^{200kg / cm 2 ~ 500kg / cm} 2 of about ultra high pressure, injecting a high-speed condition for inclusion jet from the polymerization nozzle.

In addition, according to the construction situation, fresh water is jetted at a higher pressure than the hardening material A liquid B solution, and the hardening material A is jetted by the fresh water jet.
The liquid B liquid may be involved.

For example, in the first flow path 11, the liquid A and the two flow paths
Solution B was pumped at 20kg / cm ² ~30kg / cm ² pressure of about 12,
At the same time as spraying from the core nozzle 21 and the intermediate annular nozzle 22, fresh water is supplied to the three flow paths 13 at 200 kg / cm ² to 500 kg / c.
When ejected from pumped in m ² about an ultra high pressure outer annular nozzle 23, an annular jet by Shimizu nuclear nozzle 21, combined capsule solution A solution B mixture jet from the intermediate annular nozzle 22 becomes ultrafast jet The surrounding soil is cut and agitated as the injection pipe 1 rotates.

If the injection pressure of the fresh water is higher than the injection pressure of the liquid A and the liquid B, an entrapped jet is generated without using the above-mentioned ultra-high pressure. To respond.

In this way, the two-part hardening material is injected into the target ground by retracting in the withdrawal direction while rotating the injection pipe while injecting the encapsulating jet of the liquid A liquid and the fresh water at a high pressure and rotating the injection pipe. A cured layer is formed in the shape, and this is arranged in parallel if necessary.

Since the present invention is configured as described above, there is an effect that a uniform hardening material injection layer having high strength and being hardened in a short time by the instantaneous hardening material can be formed. Therefore, the present invention can be used for ground with water veins and emergency water stop lining, and also eliminates the wasteful time required for the conventional work such as the waiting time for curing, thereby greatly improving the work efficiency.

[0022]

[Brief description of the drawings]

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

FIG. 2 is an enlarged vertical sectional side view showing the structure of the main part of the injection tube.

FIG. 3 is a front view of the same polymerization nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Injection pipe main body 11 1st flow path 12 2nd flow path 13 3rd flow path 2 Operation drive mechanism 21 Nuclear nozzle 22 Intermediate annular nozzle 23 Outer annular nozzle 3 Swivel 31 A liquid pressure supply hose 32 B liquid pressure supply hose 33 Fresh water pressure supply hose 4 Base 5 Injection pipe operation mechanism 6 Hardening material pumping device 7 Fresh water pumping device G Target ground

Claims (3)

[Claims] 1. An injection pipe provided on a tip side wall with a polymerization injection nozzle in which a nucleus nozzle and two annular nozzles are concentrically polymerized, and provided with three isolated flow paths to communicate with the nucleus nozzle and the two annular nozzles, respectively. Is inserted into the target ground, and when a predetermined depth is reached, the hardening material A
Liquid and hardener B are pumped at high pressure into the flow path communicating with the liquid and the intermediate annular nozzle, and fresh water is pumped at high pressure into the flow path communicating with the outer annular nozzle. A two-part hardening material injection method characterized by forming a hardened layer on the injection pipe trajectory by moving in the direction of 2. The two-part hardener according to claim 1, wherein the fresh water from the outer annular nozzle is jetted at a higher pressure than the hardener A liquid from the core nozzle and the hardener B liquid from the intermediate annular nozzle. Injection method 3. An injection pipe in which a polymerization injection nozzle in which a core nozzle and two annular nozzles are concentrically polymerized is provided on a tip side wall, and three isolated flow paths are provided to communicate with the core nozzle and the two annular nozzles, respectively. Is supported by a base provided with a rotating mechanism and a reciprocating mechanism, and a pressure-feeding hose connecting to a flow path communicating with a nuclear nozzle and an intermediate annular nozzle among the three isolated flow paths is hardened through a medium-pressure pump. The pressure feeding hoses connected to the material tanks for the material A liquid and the liquid B and the flow path communicating with the outer annular nozzle are respectively connected to the fresh water material tank via a high pressure pump.
Liquid hardener injection device