KR101503259B1 - Cement Grouting by Vibrating Method - Google Patents

Abstract

The present invention relates to a seismic excitation apparatus capable of introducing a reinforcing material to an object, such as bedrock, ground or concrete structure, for the purpose of leaking prevention or crack reinforcement, and a method of introducing grout using the same. In particular, the present invention relates to a seismic excitation apparatus having a seismic excitation unit for applying micro vibration to a reinforcing material so as to effectively introduce the reinforcing material to cracks or voids of an object, and a method of introducing grout using the same. The seismic excitation apparatus includes: a seismic excitation unit for applying vibration energy to a reinforcing material to be introduced according to a reference vibration frequency; an integrated control unit for controlling the seismic excitation unit; and a reinforcing material introducing unit that communicates with an outlet port of the seismic excitation unit to receive the vibrated reinforcing material and inject the reinforcing material to the cracks of the object.

Description

Cement Grouting by Vibrating Method "

The present invention relates to an excitation generator for injecting a stiffener for the purpose of improvement, leakage prevention, or crack reinforcement to objects such as rock mass, ground, and concrete structures, and a grouting method using the exciter. And more particularly, to an exciter generator capable of effectively injecting and infiltrating a stiffener through cracks or cavities of a target object, including a generating portion, and a grouting method using the same.

Cracks are generated in the structure and the ground (hereinafter referred to as "object") due to the excavation process of a structure such as a building, a tunnel and an underground highway facility, or an internal or external factor after construction. The cracks facilitate the penetration of water into the object. As the crack progresses, the structural safety of the object may be threatened.

In order to solve the risk of such a crack, a grouting reinforcement method for injecting a reinforcement into the crack is used. The reinforcing material is a suspension type in which cement or the like is mixed with water or a solution type such as a water-based chemical solution.

The cement suspension of the present invention used as the suspension type has a high strength and a low cost which are easy to develop and improve the strength and durability of the object. However, due to the viscosity of the suspension, microcracks (gaps in the range of 1/10 to 2/10 mm The following cracks). In other words, water and cement are separated from each other in the case of microcracks, and the amount of cement injected is reduced. This means that reinforcement for the microcracks is insufficient.

In order to reinforce microcracks, ultra-fine particle cement having an excellent permeability to microcracks (having an average particle size of 10 탆 and permeability equivalent to that of a solution type, capable of high-strength development) suspension or solution type reinforcement is used. However, all of these are expensive and uneconomical. Furthermore, the solution type reinforcing material has a problem that the reinforcing strength and durability of the cement suspension are inferior to the cement suspension.

Korean Patent Registration No. 0937237 (Jan. 15, 2010)

The present invention has been devised to solve the above-mentioned problems, and it is an object of the present invention to provide an exciter generator capable of efficiently injecting and infiltrating a high-viscosity high-strength reinforcing material, which is more economical and capable of exhibiting high strength, into fine cracks, and a grouting method using the same. It has its purpose.

According to an aspect of the present invention, there is provided an excitation generator including: a excitation generator for imparting vibration energy to an incoming stiffener in accordance with a reference oscillation frequency; An integrated controller for controlling the excitation generator; A reinforcing material supply unit provided to communicate with the inlet side of the excitation generating unit and supplying a stiffener to the excitation generating unit; And a reinforcing material injection unit communicating with the outlet side of the vibration generating unit to receive the reinforcing material and injecting the reinforcing material into a target object to be reinforced.

As one example, the excitation generating unit may include: a driving motor that applies power; And a vibration unit which receives the inflowing reinforcing member and applies vibration to the reinforcing member so that the particles contained in the reinforcing member are excited by the power applied from the driving motor, A vibrating rod connected to the motor and moving up and down by the power of the drive motor; A diaphragm arranged to be orthogonal to a direction in which the oscillating bar reciprocates at a position where the oscillating rod can receive a force; An inner space including an inlet through which the reinforcing material flows, an elevating and lowering space arranged to be reciprocatable in the longitudinal direction of the oscillating bar, and an excitation space excited by the impact of the diaphragm introduced into the space below the diaphragm, And a housing including an outlet for discharging an excited stiffener in the excitation space.

As an example, the housing may further include at least one oilless bearing configured to surround an outer circumferential surface of the oscillating bar in the lifting space.

As an example, the excitation generating unit may further include a stabilizing unit disposed between the generating unit and the stiffener supplying unit to dissipate irregular vibration energy that may be included in the stiffener supplied from the stiffener supplying unit.

As one example, the stiffener supply unit may include a supply pipe communicating with an inlet side of the excitation generating unit, and the stabilization unit may include at least one accumulator mounted on the supply pipe .

For example, the diaphragm may include a downward bend portion and a rim portion formed on a rim of the bend portion and mounted in the vibrating space, wherein the vibrating plate is formed with a groove having a groove shape in the circumferential direction, The edge of the diaphragm can be attached to the groove by the buffer member.

As one example, the mounting grooves are formed with recessed grooves on the upper and lower surfaces, respectively. The cushioning member has a body exposed to the outside of the dissipating groove and attached to the rim of the diaphragm, And a mounting protrusion protruded and inserted into an end of the dissipating groove.

Meanwhile, the grout injection method using the excitation generator of the present invention is characterized by including a step of boring the object to be constructed, and a step of injecting an excited reinforcement using the excitation generator described above in the perforation.

As described above, the excitation generator of the present invention and the grouting method using the same have an excitation generating part for imparting vibration by exciting a reinforcing material, thereby lowering the apparent viscosity of a high density and high viscosity cement suspension which is difficult to penetrate microcracks. Can be effectively infiltrated and injected into the cracks or cavities of the object.

Also, since the cement suspension can be produced at a low cost and high strength, grouting reinforcement can be advantageously applied economically and durably using the excitation generator of the present invention.

Particularly, in providing the vibration to the stiffener, the generating unit dissipates the irregular vibration energy that may be included in the stiffener supplied from the stiffener supply unit due to the stabilizing unit, thereby providing only the stiffener including the uniform vibration energy. There is an advantage that the injection efficiency can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram schematically showing the overall configuration of a vibration generating device according to the present invention; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]
3 is a vertical cross-sectional view illustrating a generator according to an embodiment of the present invention.
Fig. 4 is an enlarged vertical cross-sectional view of the exciting unit in the excitation generating unit of Fig. 3; Fig.
5 is a perspective view showing an artificial test piece for testing injection performance of an excited stiffener of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The excitation generator according to the present invention includes a generator 20 having a stiffener supply unit 10 and a stiffener injection unit 30 as shown in FIG.

The stiffener supply unit 10 is provided at the tip of the excitation generator 20 to supply a stiffener to the excitation generator 20 for reinforcing the target object.

The reinforcing material supply unit 10 includes a supply pipe 100 for communicating with the inlet 2003 of the excitation generating unit 20 to transport the reinforcing material and a storage tank 110 for receiving the reinforcing material. At least one tank is provided so that when the reinforcing material is composed of a plurality of compositions, each composition can be separated and accommodated.

The stiffener supply unit 10 is not shown in the figure but is provided with stirring means to stir the stiffener including at least one composition contained in the at least one storage tank 110, To the inlet (2003) side of the excitation generator (20) through the pipe (100).

The reinforcing material may be a suspension type reinforcing material such as a commonly used portland or general cement suspension. However, the present invention is not limited to the type of the reinforcing material but may be a reinforcing material suitable for the type of the object such as a rock, Lt; / RTI > can be selected.

The pump 120 installed in communication with the supply pipe 100 imparts a moving energy for flowing the stiffener stored in the storage tank 110 or stirred by the stirring means to the generation unit 20.

The stiffener supply unit 10 is provided with a pressure gauge 130 mounted on the supply pipe 100 and a flow meter 140 and a return valve 150. The amount of the stiffener supplied to the generation unit 20, And such data can be utilized as basic data for controlling the output amount of the pump of the stiffener supply unit 10, the supply amount of the stiffener, the supply pressure of the stiffener, and the like.

Meanwhile, the excitation generating unit 20 is configured to impart vibration energy to the reinforcing material supplied from the reinforcing material supplying unit 10, and the reinforcing material to which the vibration is applied is inserted into the reinforcing material injecting apparatus 30 .

The excitation generating unit 20 includes a vibration unit 200, a driving motor 210, and a stabilization unit 220 as shown in FIG.

The backflow prevention unit 230 and the flow meter 240 may be installed at a position immediately before the stiffener is introduced into the vibration generating unit 20 before the vibration unit 200 is described. The backflow prevention unit 230 prevents the vibration energy or the stiffener excited in the vibration unit 200 from flowing back to the stiffener supply unit 10.

As the backflow prevention unit 230, a ball valve or the like may be used. The flow meter 240 confirms the flow rate of the reinforcing material flowing into the vibration unit 200. The flow rate data can be utilized as basic data for controlling the vibration unit 200 as described above.

The vibration unit 200 includes a housing 2000, a vibration rod 2010, and a diaphragm 2020.

The housing 2000 is a hollow body having a shape extending in the longitudinal direction and an internal space 2001 is formed therein and the vibrating rod 2010 is reciprocated in the longitudinal direction And an excitation space 2001-2 excited by a reinforcement introduced into the space below the diaphragm 2020. The excitation space 2001-2 is a space in which the excitation space 2001-2 is disposed.

At this time, the elevating space 2001-1 is provided with at least one oilless bearing 2002 configured to surround the outer circumferential surface of the vibrating rod 2010, The durability against the lifting space 2001-1 can be improved due to mechanical degradation factors such as friction, vibration and impact load which may occur due to the nature of the lifting space 2001-1 as well as the lifting space 2001-1.

The housing 2000 of the vibrating unit 200 is provided with an inlet 2003 communicating with the supply pipe 100 at an upper portion thereof and an inlet 2003 formed along the longitudinal direction of the housing 2000, An inlet channel 2004 communicating with the space 2001-2 is formed. In the case of the inlet channel 2004, the inlet channel 2004 is formed in an annular shape at the upper part of the inside of the housing 2000, At least two longitudinal passages (2004-2) communicating with the annular passage (2004-1) along the longitudinal direction of the housing (2000), and at least two longitudinal passages And a discharge port 2004-3 communicating with the vibrating space 2001-2.

Due to the configuration of the inlet passage 2004, the stiffener introduced into the inlet 2003 is discharged to the discharge port 2004-3 through the annular passage 2004-1 and the length passage 2004-2 sequentially, Can be introduced into the space (2001-2).

The discharge direction D of the reinforcing material discharged into the space 2001-2 in the discharge port 2004-3 is perpendicular to the vibration direction V of the diaphragm 2020, . This means that the vibrating space 2001-2 is spaced apart from the length passage 2004-2 by a predetermined distance. By this arrangement, it is possible to prevent the stiffener, which has been vibrated in the vibrating space 2001-2, from flowing back to the inflow passage 2004.

In this embodiment, four length passages 2004-2 and a discharge port 2004-3 are formed at an angle of 90 degrees. However, according to the sectional view of FIG. 4, two length passages 2004-2 and 3 Only the discharge ports 2004-3 are shown. However, the number of the length passages 2004-2 and the discharge ports 2004-3 of the present invention is not limited by the above-mentioned number, but it is natural that the number of the length passages 2004-2 and the discharge port 2004-3 can be selectively configured in consideration of the inflow amount of the reinforcement.

One end of the vibrating rod 2010 is connected to the driving motor 210 and is reciprocated by the rotation of the driving motor 210. This rotation is transmitted to the rotating shaft 211 by means of a cam 212 or the like which is mounted on the moving rod 2010. [ The structure for converting the rotational force of the driving motor 210 into the up / down reciprocating motion of the vibrating rods 2010 in addition to the structure of the cam 212 described above can be variously practiced by those skilled in the art, and a detailed description thereof will be omitted .

The diaphragm 2020 is disposed at a position where the vibrating plate 2010 can receive a force by the vibrating rod 2010 and is disposed substantially perpendicular to a direction in which the vibration rod 2010 reciprocates, The vibration is substantially imparted according to the interaction between the two. That is, the diaphragm 2020 receives the force by the collision with the vibrating bar 2010, and generates vibration energy continuously.

4, the diaphragm 2020 has a curved portion 2021 bent in a downward direction in its cross section to enlarge the contact area with the end of the vibration rod 2010, So that exercise can be performed more efficiently. The diaphragm 2020 is preferably made of a material having elasticity and ductility required for generation of vibration in the material.

In addition, the vibration unit 200 mounts a buffer member 2030 between the diaphragm 2020 and the inside of the housing 2000 to relieve vibrations generated in the diaphragm 2020 from being transmitted to the housing 2000, So that it can be transmitted only to the space 2001-2 without being dissipated.

The vibration energy generated by the diaphragm 2020 in this way acts in the vibrating space 2001-2 and can be applied to the reinforcing material flowing into the space 2001-2 through the discharge port 2004-3 The stiffener including the vibration energy moves to the stiffener injection unit 30 to be infiltrated into the microcracks or cavities more efficiently.

According to an embodiment of the present invention, the diaphragm 2020 is formed at a rim of the bending portion 2021 in addition to the configuration of the bending portion 2021, The mounting groove 2001-3 is formed in the vibrating space 2001-2 in the circumferential direction and the mounting groove 2001-3 is formed in the mounting groove 2001-3. 2022 are attached by the cushioning member 2030.

In addition to the mounting structure of the diaphragm 2020, the present embodiment suggests a structure capable of minimizing the dissipation of vibration energy to the outside when the vibration energy is generated in the diaphragm 2020.

Specifically, as shown in FIG. 4, the mounting grooves 2001-3 are formed with grooved grooves 2001-4 on the upper and lower surfaces, respectively, and the buffer member 2030 is formed with the grooves 2001 A body 2031 exposed to the outside of the diaphragm 2020 and attached to the rim 2022 of the diaphragm 2020 and a body 2031 integrally protruding from the body 2031 and inserted into the end of the dissipating groove 2001-4 A mounting projection 2032 is formed.

That is, since the dissipating grooves 2001-4 are formed on the lower surface of the mounting groove 2001-3, the space 2001-2 from the housing 2000 due to the space occupied by the dissipating grooves 2001-4, That is, the contact area is minimized so that the vibration energy is not transmitted to the housing 2000.

Particularly, the vibration energy transmitted to the cushioning member 2030 flows to the groove space of the dissipating groove 2001-4 along the mounting protrusion 2032 at the end of the cushioning member 2030, thereby preventing the vibration energy from finally flowing out to the outside And dissipated in the dissipation groove (2001-4).

As described above, the present embodiment is characterized in that a characteristic mounting structure of the diaphragm 2020 is provided which can prevent external leakage of vibration energy and transmit vibration energy only to the vibrating space 2001-2.

The housing 2000 is formed with an outlet 2005 at a lower portion thereof and a guide portion 2006 is formed at a lower portion of the vibrating space 2001-2 and adjacent to the outlet 2005, 2 is guided to the stiffener injection portion 30 by the guide portion 2006 connecting the outlet 2005 side. At this time, it is preferable that the guiding direction I in which the reinforcing member is guided coincides with the vibration direction V. Accordingly, the progress of the reinforcement material to the reinforcement material injection portion 30 is not restricted in the process of applying vibration to the reinforcement material.

The driving motor 210 provides a driving force for motion of the vibrating rod 2010 which is movably disposed in the vibration unit 200. The driving motor 210 drives the rotating shaft of the vibrating unit 200, 2010), and may include, for example, a cam 212 structure as described above.

Meanwhile, the stabilizing unit 220 performs a stabilization process on the reinforcing material supplied from the reinforcing material supplying unit 10 to the generating unit 20.

The stabilization unit 220 dissipates irregular vibration energy that may be contained in the stiffener due to the generation of minute vibration of the pump 120 of the stiffener supply unit 10. In the present embodiment, And at least one accumulator to be mounted.

The accumulator absorbs and mitigates shock and vibration due to unstable pumping pressure of the pump 120 or sudden stop of the pump. The configuration of such accumulators will not be further described as will be appreciated by those skilled in the art.

As described above, in the excitation generating unit 20 according to the present embodiment, the reinforcement material containing the vibration energy is transmitted to the reinforcement material injecting unit 30, so that the reinforcement material is dispersed in the cracks or cavities of the object including the rock, So that it can be effectively injected and infiltrated.

Particularly, in the vibration generating unit 20, since the stabilizing unit 220 for removing or alleviating the irregular vibration is provided in imparting the vibration to the reinforcing material supplied from the reinforcing material supplying unit 10, Since the reinforcement material is transmitted to the reinforcement material injection unit 30, reinforcement material can be more effectively injected and infiltrated into micro cracks.

The stiffener excited in the above-described excitation generator 20 is injected into the object through the injection pipe of the stiffener injection unit 30. The excited particulates of the excited stiffener are excited or excited by receiving the vibrational energy and the apparent viscosity of the stiffener is relatively lower than that before the vibration is applied. This lowering of the apparent viscosity makes it possible to effectively inject the reinforcing material, which is a suspension of the cement flow, into the microcracks (C).

An injection hole 310 is formed in the object to inject the reinforcing material, and the injection casing 320 is inserted into the injection hole 310. When the injection pipe 300 is inserted into the injection casing 320 and the injection is performed, the packer 330, which is mounted on the injection pipe 300 and formed of rubber material or the like, Seal the injection casing (320) so that the injected stiffener does not flow backward.

In order to control the stiffener injected into the crack C through the stiffener injection unit 30 to have a vibration frequency range for maximizing the injection effect, The integrated control unit 40 may further include a control unit 40 and a frequency sensing sensor 410. [

The frequency sensing sensor 410 is mounted on the injection pipe 300 and detects the frequency of a reinforcement material injected into the crack C through the injection pipe 300 by the excitation generating unit 20. This is because the vibration of the stiffener during the injection of the reinforcing material into the crack C is attenuated by moving the injection pipe 300 compared to the vibration when the reinforcing material is excited by the generating portion 20, And to selectively control the drive of the excitation generator 20 according to the comparison value.

The frequency of the attenuation vibration of the stiffener sensed by the frequency detection sensor 410 is detected by the frequency detector 401 of the control unit 400. The frequency detected by the frequency detector 401 is transmitted to the contrast circuit 403 via the controller 402 and the contrast circuit 403 adjusts the frequency of the reference vibration frequency And the actual attenuation vibration frequency detected through the frequency detection sensor 410 are compared with each other.

In this case, the controller 402 controls the rotation speed of the driving motor 210 according to the difference. That is, in order to compensate the attenuation vibration frequency detected through the frequency detection sensor 410, the output is higher than the initially set rotation speed so that the vibration frequency injected into the crack C is controlled to be substantially equal to the reference vibration frequency .

The integrated controller 40 includes an amplifier 404 disposed between the controller 402 and the driving motor 210. The amplifier 404 is transmitted from the controller 402 to the driving motor 210 Thereby amplifying the control signal.

In this case, the drive motor 210 can be controlled in accordance with a control signal output from the controller 402 by employing an inverter-type motor capable of adjusting the rotation speed.

5, the range of the reference vibration frequency set in the integrated controller 40 will be described in order to maximize the injection efficiency of the reinforcement material with respect to the crack C of the object.

Experimental Example  One

5 shows a perspective view of an artificial test piece 50 for testing the injection performance of a reinforcing material with respect to a crack. Referring to FIG. 5, the artificial test body 50 includes upper and lower plates 500 and 510 and a pair of spacers 520 disposed therebetween.

The spacer 520 forms a gap between the upper and lower plates 500 and 510, that is, an injection gap 530. The injection interval 530 is an artificial space corresponding to the crack C in FIG.

One side of the injection gap 530, the right end side in the drawing, is connected to the injection pipe 300. The injection pipe 300 is configured to transfer and inject the reinforcing material excited by the excitation generating unit 20 as described above. The reinforcing material injected to one end side of the injection gap 530 proceeds along the injection gap 530 and is discharged to the other end side of the injection gap 530,

First, the penetration velocity into the injection gap 530 according to the frequency range of excitation of the suspension-type stiffener in which the mixing ratio of water and general cement is 2: 1 is examined. Here, the length of the injection interval 530 is 280 cm, and the height (interval) is 0.1 mm.

Frequency (Hz) 0 5 7.5 10 12.5 15 17.5 20 First pass
Speed (cm / sec) 11.66 15.56 21.54 18.67 20.00 17.50 18.67 17.50 100 (ml) 2.98 4.52 8.75 7.00 6.51 5.38 5.28 5.00 200 (ml) 1.53 2.46 4.52 3.64 3.46 2.89 2.75 2.43 300 (ml) 1.00 1.63 3.08 2.22 2.24 1.87 1.77 1.56 400 (ml) 0.75 1.20 2.28 1.65 1.63 1.36 1.29 1.13 500 (ml) 0.59 0.96 1.78 1.32 1.29 1.06 0.98 0.89

Referring to Table 1 above, when the frequency of 7.5 is applied, the average passage or penetration velocity during the injection amount 100 passes through the injection interval 530 is 8.75. This is equivalent to three times the penetration velocity 2.98 when the frequency is zero (when no vibration is applied). This result is irrelevant to the change of the injection amount of the stiffener. In other words, it can be concluded that the infiltration rate for the excitation interval 530 of the excited stiffener at a frequency of 7.5 is approximately three times that of a frequency of zero (when no vibration is applied).

Furthermore, if the frequency range is 6 to 13.5 for an injection volume of 100, the infiltration rate of the stiffener is at least 6. Penetration rate 6 is twice the infiltration rate 2.98 in the absence of an exciter.

As a result, it is most preferable that the vibration frequency for holding the stiffener is 7.5 because the maximum penetration velocity can be obtained.

However, in the case where a minimum vibration frequency is given in comparison with a case where the frequency is 0 (no vibration is applied), for example, even if a frequency of 3 Hz or more is given, though not shown in [Table 1] It is a matter of course that the vibration frequency given according to the embodiment of the present invention can be made within the range of 3 Hz to 20 Hz.

Experimental Example  2

Next, the penetration velocity into the injection gap 530 according to the frequency range of excitation of the suspension-type stiffener in which the mixing ratio of water and ultrafine particle (micro) cement is 1: 1 is examined. Here, the length of the injection interval 530 is 280 cm, and the height (interval) is 0.1 mm, which is the same as in Experimental Example 1.

Frequency (Hz) 0 5 7.5 10 12.5 15 17.5 20 100 (ml) 1.94 2.56 5.00 4.30 3.11 3.18 3.41 2.71 200 (ml) 0.97 1.41 2.20 2.13 1.62 1.76 1.64 1.51 300 (ml) 0.66 0.96 1.37 1.31 1.10 1.12 1.10 1.03 400 (ml) 0.49 0.71 0.98 0.95 0.84 0.85 0.83 0.78 500 (ml) 0.38 0.56 0.76 0.73 0.67 0.67 0.66 0.64

Referring to Table 2, when the frequency of 7.5 is applied, the passing or penetration velocity is 5.00 while the injection amount 100 is completely passed through the injection interval 530. This is a speed equivalent to 2.5 times the penetration speed of 1.94 when the frequency is zero (when no vibration is applied). These results are almost irrelevant to the variation of the amount of reinforcement injected as in the case of the conventional general cement suspension. In other words, it can be concluded that the penetration velocity of the excited stiffener at the frequency of 7.5 to the injection gap 530 is approximately 2.5 times that of the frequency of 0 (when no vibration is applied).

Further, if the frequency range is 5.5 to 15 when the injection amount is 100, the infiltration rate of the stiffener is at least 3.2. The infiltration rate 3.2 is about 1.65 times the infiltration rate 1.94 in the absence of the excitation.

As a result, it is most preferable that the vibration frequency for holding the stiffener is 7.5 because the maximum penetration velocity can be obtained. However, in this experiment example, when the minimum vibration frequency is given in comparison with the case where the frequency is 0 (when no vibration is applied), for example, even though not shown in Table 1, It is natural that the vibration frequency range given according to the practice of the present invention can be made within the range of 3 Hz to 20 Hz.

As described above, according to Experimental Examples 1 and 2, it can be seen from the experimental results of the general cement suspension and the micro cement suspension that the optimum vibration frequency for the reinforcing material is 7.5 Hz, but the present invention is not limited to the above results, As described above, the vibration frequency can be selectively applied within a range of 3 Hz to 20 Hz in which penetration effect on the stiffener is recognized in comparison with a frequency of 0 (when no vibration is applied).

Here, in setting the vibration frequency within the above-mentioned range, the vibration frequency suitable for the type and shape of the soil layer or the rock layer is selected and given to the present invention.

For example, as shown in the following Table 3, the soil layer including the clayey soil, the sandy soil, the sandstone layer, the oily layer, and the rock layer including weathered rock, soft rock, It is suggested that appropriate frequencies optimized for the characteristics of the object such as the soil condition and the permeability coefficient are given as well as the type of object.

Soil Soil condition
Permeability coefficient
k (cm / sec) Proper frequency
(Hz) Remarks Clayey soil Clay, sand Loose 3.20 × 10 ^-4 5 middle 1.08 × 10 ^-4 5 Dense 6.85 × 10 ^-5 5 Sandy soil Thin sand Loose 6.50 x 10 ^-2 5 to 10 Some of the low permeability layer middle 3.20 x 10 ^-2 5 to 10 Dense 8.90 × 10 ^-3 5 to 7.5 Coarse sand Loose 3.00 x 10 ^-1 10 to 15 Adjustable according to soil compaction type middle 1.04 x 10 ^-1 10 to 15 Dense 8.15 x 10 ^-2 10 to 15 Gravity layer Sand, gravel middle 10 ^-1 cm / sec 5 to 10 Adjustable according to mixing ratio of gravel and all seats All seats Mixed all seats middle 10 ^-0 cm / sec 5 to 10

Ground Permeability coefficient
k (cm / sec) Proper frequency
(Hz) Opening condition Weathered rock
Soft stone
Common cancer
Carcass 10 ^-1 7.5 to 12.5 Clay, Particulate Part Coordination 10 ^-2 7.5 to 12.5 10 ^-3 7.5 to 15 Clay, Particulate Part Coordination 10 ^-4 12.5 to 15 10 ^-5 12.5 to 15 Micro cement
Injector

As described above, the vibration frequency suggested in the present invention can be defined in the range of 3 Hz to 20 Hz, and it is preferable that the vibration frequency is controlled so as to be given by selecting an appropriate frequency according to the type or characteristic of the object as described above will be.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

10: Stiffener supply part 20:
30: reinforcement material injection part 40: integrated control part
100: supply pipe 110: storage tank
120: pump 200: vibration unit
210: drive motor 220: stabilization unit

Claims (8)

A vibration generating unit including a vibrating unit for receiving the inflowing stiffener and applying vibration to the stiffener so that the particles included in the stiffener are excited by the power applied from the drive motor;
An integrated controller for controlling the excitation generator;
A reinforcing material supply unit provided to communicate with the inlet side of the excitation generating unit and supplying a stiffener to the excitation generating unit; And
And a reinforcing material injection unit communicating with the outlet side of the excitation generating unit to receive the excited stiffener and inject it into a target object to be reinforced,
The vibration unit includes:
A vibrating rod connected to the driving motor and moving up and down by the power of the driving motor; A diaphragm arranged to be orthogonal to a direction in which the oscillating bar reciprocates at a position where the oscillating rod can receive a force; An inner space including an inlet through which the reinforcing material flows, an elevating and lowering space arranged to be reciprocatable in the longitudinal direction of the oscillating bar, and an excitation space excited by the impact of the diaphragm introduced into the space below the diaphragm, An outlet for discharging an excited stiffener in the excitation space, and at least one oilless bearing configured to surround an outer circumferential surface of the oscillating bar in the elevation space,
Wherein the diaphragm comprises a bend portion having a cross section bent in a downward direction and a rim portion formed in a rim of the bend portion and mounted in the vibrating space,
The mounting groove has a rim of the diaphragm attached to the mounting space by a cushioning member, and grooves of a concave shape are formed on upper and lower surfaces of the mounting groove, respectively. Wherein the buffer member comprises a body exposed to the outside of the dissipating groove and attached to a rim of the diaphragm, and a mounting protrusion integrally protruding from the body and inserted into an end of the dissipating groove.
delete delete The method according to claim 1,
Wherein the excitation generator comprises:
And a stabilizing unit disposed between the generating unit and the stiffener supply unit for dissipating irregular vibration energy that may be included in the stiffener supplied from the stiffener supply unit.
5. The method of claim 4,
The stiffener-
And a supply pipe communicating with the inlet side of the generating section is provided,
The stabilizing unit includes:
And at least one accumulator mounted on said supply pipe.
delete delete Piercing; And
And injecting an excited reinforcement material into the perforation by using the generator of any one of claims 1, 4, and 5. The grouting method using the exciter generator of claim 1,

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