KR101007287B1 - Method and apparatus for injecting reinforcing material in near-vibrating manner - Google Patents

Abstract

The present invention has a reinforcing material injection method of the proximity excitation method configured to minimize the damping of the vibration wave and improve the injection efficiency by having a reinforcing material flowing for injection in the injection hole formed in the object that needs to be reinforced And an apparatus.

Description

Reinforcement injection method and device of near-excitation type TECHNICAL FIELD AND APPARATUS FOR INJECTING REINFORCING MATERIAL IN NEAR-VIBRATING MANNER

The present invention relates to a method for injecting a reinforcement in a crack formed on an object such as a rock or a structure or ground, and an apparatus used therefor.

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

In order to solve the risk due to such cracks, a reinforcement method of injecting a reinforcement into the cracks is used. As the reinforcing material, a suspension type in which cement or the like is mixed with water, or a solution type such as a water glass chemical solution is used.

Portland cement suspension used in the suspension form is economical and easy to express high strength to improve the strength and durability of the object is cheap, but due to the viscosity of the suspension fine cracks (1/10 ~ 2/10 mm range) There is a problem that the permeability to the following cracks) is inferior. In other words, water and cement are separated for the microcracks, thereby reducing the amount of cement injected. This means that the reinforcement for the microcracks is insufficient.

In order to reinforce the microcracks, ultrafine cement cement having excellent permeability to the microcracks (average particle size of 10 µm, which is comparable to solution type and capable of high strength expression) is used as a suspension or a solution type reinforcement material. However, these are all expensive and inexpensive, and solution reinforcement has a problem of inferior reinforcement strength and durability for the object compared to cement suspension.

One object of the present invention is to provide a reinforcing material injection method of a form different from the conventional.

Another object of the present invention to provide a reinforcing material injection method for minimizing the damping of the vibration wave while increasing the permeability to fine cracks by having a reinforcing material (加 振).

Still another object of the present invention is to provide a reinforcement injection device that can be disposed in an injection hole formed in an object to realize the above injection method.

Reinforcing material injection method of the proximity-excited method in accordance with an embodiment of the present invention for realizing the above object is to form an injection hole for the reinforcement injection in the object, the reinforcement in the flow for injection in the injection hole And to ensure that it has an excitation.

According to an aspect of the present invention, the reinforcing material includes a cement suspension, the object may include at least one of the artificial structure, natural soils and cut slopes.

According to another aspect of the present invention, the excitation for the reinforcing material is made by a excitation unit disposed in the injection hole, the excitation excitation wave may be a sinusoidal range of 7.5 to 22.5 Hz range.

According to another aspect of the present invention, the configuration is preferred to have in progress in the direction intersecting the direction of the reinforcement when the excitation is made to mitigate the reverse transmission of the vibration wave. The method may further include adjusting a frequency for the excitation to detect the frequency of the reinforcement so that the reinforcement has a reference.

The reinforcement injection device of the proximity excitation method according to another embodiment of the present invention is inserted into the injection hole formed in the object and the excitation unit having a casing having an internal space, and a reinforcement disposed in the internal space, and the And a guide portion in communication with the excitation unit for guiding the excited reinforcement to the portion to be injected.

According to one aspect of the invention, the mall guide is an injection pipe connected to the outlet of the excitation unit, it may include a packer mounted to the injection pipe to prevent the injection material from flowing back in the casing. The excitation unit includes a drive source and a vibration unit that generates vibration in linkage with the drive source.

According to another aspect of the invention, the drive source is controlled so that the frequency sensing sensor for measuring the attenuated vibration frequency of the reinforcement injected into the object, and the attenuation vibration frequency detected by the frequency detection sensor corresponds to the set reference vibration frequency The controller is further included.

The reinforcing material injection method and apparatus of the proximity excitation method according to the present invention configured as described above is to reduce the apparent viscosity of the high-density, high-viscosity cement suspension difficult to penetrate into the micro cracks, as the reinforcing material injected into the crack is present Effective penetration into microcracks.

In addition, as the reinforcing material is excited during the flow for injection in the injection hole, the damping of the vibration wave can be alleviated as compared with the case where the reinforcing material is transported after being excited away from the crack. This allows the penetration of the reinforcement to the crack without a significant change in the state of the reinforcement, has the effect of improving the permeability of the reinforcement.

Since the cement suspension is inexpensive or can exhibit high strength, the crack reinforcement device according to the present invention can be used to perform crack reinforcement work cheaper and more durable.

 In addition, the reinforcement apparatus and method according to the present invention can control the unit having a frequency range that is most suitable for penetration of the reinforcement material into the crack, thereby making the crack reinforcement process more efficient.

Hereinafter, the reinforcing material injection method and apparatus of the proximity vibration method according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present specification, the same or similar reference numerals are assigned to the same or similar configurations in different embodiments, and the description thereof is replaced with the first description.

1 is a conceptual diagram for implementing a reinforcing material injection method according to an embodiment of the present invention, Figure 2 is an enlarged cross-sectional view of a portion of the object 400 of FIG.

Referring to FIG. 1, a pumping unit that pumps to supply a reinforcement to a portion to be reinforced of the object 400 is generally designated by the reference numeral 100. The pumping unit 100 includes a reservoir 110 for storing the reinforcement. The reservoir 110 is provided with a stirrer (not shown) to agitate the reinforcement. The pumping pipe 160 extending from the reservoir 110 guides the reinforcement to the excitation unit 200 side.

The pump 120 installed in communication with the pumping pipe 160 pumps toward the unit 200 having the reinforcing material stored in the storage container 110. Here, the reinforcement may be of a suspension type, such as commonly used portant or general cement suspension.

The flow meter 130 and the pressure gauge 140 connected to the pumping pipe 160 are for controlling the amount of reinforcement pumped or the pumping pressure, respectively. The return valve 150 is a valve for recovering the reinforcing material not injected from the object 400 to the storage container 110, and the return pipe 170 serves as a passage for the recovery to return the return valve 150 and the storage container 110 to each other. Connect.

The excitation unit 200 connected to the pumping pipe 160 is excited in the injection hole 410 formed in the object 400, so as to penetrate into the crack 430 with a suitable permeability. To this end, the excitation unit 200 may be disposed in the injection hole 410. In order to install the excitation unit 200, a casing 420 having an internal space may be disposed in the injection hole 410. The excitation unit 200 may be disposed in the casing 420 and may be combined with the inner circumference of the casing 420.

An injection pipe 460 may be connected to the excitation unit 200 as a guide for guiding the reinforcing material excited by the excitation unit 200 toward the crack 430. The injection pipe 460 is directed toward the end of the injection pipe 460, and the reinforcement injected from the injection pipe 460 penetrates into the crack 430 connected to the main hole 410.

A packer 500 is installed between the injection pipe 460 and the casing 420 to relieve or prevent backflow of the reinforcement injected from the injection pipe 460 through the inner space of the casing 420.

Referring to FIG. 2, the object 400 may be natural ground. In the ground, a fill layer 401 is formed on an upper side, and a rock layer 402 is formed on a lower side. The injection hole 410 is drilled in a direction crossing the ground surface 440 through a drilling or the like, typically in a vertical direction.

The casing 420 has a form of a hollow body extending in one direction in the same direction as the extending direction of the injection hole 420. If the excitation unit 200 is coupled to the casing 420 and the pumping pipe 160 and the inlet pipe 460 for introducing the reinforcement into or out of the excitation unit 200 are connected, the inlet pipe 460 By inserting the casing 420 (with the vibration unit 200 mounted), preparation for the crack 430 reinforcement operation is simplified. The end of the injection pipe 460 forms an injection zone 450 through which the reinforcement is injected.

Unlike the natural ground, the object 400 may be an artificial structure such as a dam, a reverside dike, a sea dike, a tunnel, a building, or a natural object to which artificial manipulation such as a cut soil layer or a rock layer is applied. have.

3 is a cross-sectional view showing an excitation unit 200 according to an embodiment of the present invention.

Referring to this figure, the excitation unit 200 includes a housing 210, a reinforcement flow passage 220 and a vibration generating unit 230.

The housing 210 has a first housing 211 connected with an inlet pipe 201 for inflow of the reinforcement, a second housing 212 connected with an outlet pipe 202 for outflow of the reinforcement, and first and second And a third housing 213 connecting the two housings 211 and 212. The third housing 213 is surrounded by the fourth housing 214 at a predetermined interval 223.

The inlet pipe 201 may be formed separately or integrally with the pumping pipe 160, and the outlet pipe 202 may also be separately formed or integrally formed with the inlet pipe 460. The inlet pipe 201 and the outlet pipe 202 may be detachably connected to the first or second housings 211 and 212 by screwing, for example. As the inlet pipe 201 and the outlet pipe 202 are connected to both ends of the longitudinal direction of the housing 210, their combinations are aligned in one direction to have an arrangement suitable for insertion into the casing 420. .

The reinforcement introduced into the housing 210 through the inflow pipe 201 flows through the tubular passage 221 to the annular passage 222. The reinforcement is introduced into the excitation chamber 236 along the tubular length passage 223 formed between the first to third housings 211 to 213 and the fourth housing 214.

The vibration generator 230 includes a driving source and a vibration unit. The driving source may be a motor 231 generating a rotational force. The motor 231 is preferably equipped with an inverter to enable the rotational speed adjustment from the viewpoint of the vibration frequency control. The motor 231 may be connected to and controlled by the controller 340 by the cable C. The vibrator includes a rotation force transmitting unit 232, a vibrating rod 233, and a vibrating plate 234.

The rotational force transmitting unit 232 transmits the rotational force of the motor 231 to the vibrating rod 233 to allow the vibrating rod 233 to reciprocate along the longitudinal direction of the housing 210. To this end, the torque transmission unit 232 may have a form such as a cam eccentric to one side. The diaphragm 234 may be supported by the shock absorbing member 235 and deformed by the vibration bar 233 to apply a vibration wave having a frequency of a predetermined band to the reinforcing material. Applicants have found that 7.5-22.5 Hz is suitable as the frequency band.

The reinforcement flow passage 220 flowing into the excitation chamber 236 is subjected to vibration along a direction perpendicular to the direction crossing the inflow direction. As a result, the occurrence of an obstacle in the inflow of the reinforcing material by the reverse transmission of the vibration wave is alleviated. The reinforcing material excited in the excitation chamber 236 is lifted up and flows out through the outlet pipe 202 with improved permeability.

4 is a conceptual diagram illustrating an excitation unit 200 operating together with the frequency control unit 300 according to another embodiment of the present invention.

Referring to FIG. 4, the driving source 231 and the vibrating parts 232 to 234 constituting the excitation unit 200 are disposed in an underground portion of the object 400 that is ground. Furthermore, the frequency detection sensor 360 is further disposed in the basement portion.

The frequency detecting sensor 360 forms part of the frequency adjusting unit 300 which may be disposed on the ground portion. The frequency control unit 300 includes a power supply unit 310, a frequency detector 320, a contrast circuit 330, a controller 340, and an amplifier 350.

The frequency sensor 360 detects the vibration frequency of the reinforcing material introduced into the unit 200 having the casing 420 disposed therein, which is detected by the frequency detector 320. The detected frequency is contrasted with a specific oscillation frequency set to be effectively injected into the crack 430 in the contrast circuit 330. Based on the contrast result, the controller 340 controls the degree of rotation of the operation of the driving source 231, and the amplifier 350 amplifies the signal transmitted from the controller 340 to the driving source 231. This control enables more precise excitation of the reinforcement injected into the crack 430.

According to the reinforcement apparatus and the construction method configured as described above, the reinforcing material pumped from the pumping unit 100 and introduced into the excitation unit 200 through the pumping pipe 160 is excited by the vibration unit of the excitation unit 200 and the like.

Since the excitation is made in the injection hole 410 of the object 400 in which the crack 430 is formed, the reinforcing material excited by the excitation unit 200 is minimal to its vibration when flowing into the crack 430. You will only experience attenuation. This means that even a highly viscous reinforcement such as an excited cement suspension may be excited to the level required and effectively penetrate into the crack 430. In addition, the degree of impairment of the excitation effect due to the damping of the vibration is weak, so that it does not require more excitation.

The degree of excitation for the reinforcement can be adjusted to the most appropriate level by detecting the frequency for the reinforcement flowing into the excitation unit 200 and comparing it with the reference frequency by the frequency adjusting unit 300. This also prevents uniform excitation or excessive excitation ignoring the vibration frequency of the reinforcing material, thereby enabling smooth operation without overloading the excitation unit 200.

In the above described with reference to the accompanying drawings and the reinforcing device and the method according to the present invention, the present invention is not limited by the embodiments and drawings disclosed herein, but to those skilled in the art within the scope of the technical idea of the present invention Various modifications can be made by this.

1 is a conceptual diagram for implementing a reinforcing material injection method according to an embodiment of the present invention,

FIG. 2 is an enlarged cross-sectional view of the object portion of FIG. 1;

3 is a cross-sectional view showing an excitation unit according to an embodiment of the present invention,

4 is a conceptual diagram illustrating an excitation unit operating together with a frequency control unit according to another embodiment of the present invention.

Claims (11)

(a) forming an injection hole in the object for reinforcing material injection; And (b) causing the reinforcement to be excited during the flow for injection in the injection hole, In step (b), the excitation of the reinforcing material is made by an excitation unit disposed in the injection hole, The unit having the above, A first housing connected to an inflow pipe for inflow of the reinforcement material, a second housing connected to an outlet pipe for outflow of the reinforcement material, and a third housing connecting the first and second housings with a space therebetween A fourth housing surrounding the third housing and an excitation chamber in communication with the outlet pipe and disposed between the second and third housings, The reinforcement introduced into the first housing through the inlet pipe is formed between the third and fourth housings so as to be excited during the excitation in the direction intersecting with the direction of the reinforcement to mitigate reverse transmission of the vibration wave. Reinforcing material injection method of the proximity excitation type flows along the tubular length passage, the excitation chamber flows in a direction perpendicular to the tubular length passage. The method of claim 1, The reinforcement in the step (a) is a reinforcement injection method of the proximity-excited method characterized in that it comprises a cement suspension. The method of claim 1, The object is a stiffener injection method of the proximity excitation method characterized in that it comprises at least one of the artificial structure and the natural soil body and the inclined inclined surface. delete The method according to any one of claims 1 to 3, The excitation excitation wave is a sine wave in the range of 7.5 to 22.5 Hz stiffener injection method of the proximity excitation method. delete The method according to any one of claims 1 to 3, and (c) detecting the frequency of the reinforcement and adjusting the frequency for the excitation such that the reinforcement is excited as a reference. A casing which can be inserted into an injection hole formed in the object and has an inner space; An excitation unit disposed in the inner space and having a reinforcing material introduced thereto; And In communication with the excitation unit, comprising a guide for guiding the excited reinforcement to the portion to be injected, The unit having the above, A first housing connected to an inflow pipe for inflow of the reinforcement material, a second housing connected to an outlet pipe for outflow of the reinforcement material, and a third housing connecting the first and second housings with a space therebetween A fourth housing surrounding the third housing and an excitation chamber in communication with the outlet pipe and disposed between the second and third housings, The outlet pipe is connected with the guide, The reinforcement introduced into the first housing through the inlet pipe is formed between the third and fourth housings so as to be excited during the excitation in the direction intersecting with the direction of the reinforcement to mitigate reverse transmission of the vibration wave. A device for injecting stiffeners of a proximity excitation type that flows along a tubular length passage and flows in a direction perpendicular to the tubular length passage into the excitation chamber. The method of claim 8, The malleable guide is an injection pipe connected to the outlet of the excitation unit, And a packer mounted to the injection pipe to prevent injection material from flowing back in the casing. 10. The method according to claim 8 or 9, The unit having the above, Drive source; And Reinforcement injection device of the proximity excitation system characterized in that it comprises a vibrating unit for generating a vibration linked to the drive source. The method of claim 10, A frequency sensor for measuring attenuated vibration frequency of the reinforcing material injected into the object; And And a controller for controlling the driving source so that the attenuation vibration frequency detected by the frequency detection sensor corresponds to the set reference vibration frequency.

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