JP2017166194A - Modification method by injection for concrete structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a modification method by injection for a concrete structure that suppresses deterioration of the concrete structure regardless of a crack width on the concrete structure and without causing a structural damage.SOLUTION: A modification method S by injection for a concrete structure includes: a drilling step S1 for forming a drilled hole on a wall surface of a concrete structure; a pipe fixing step S2 for inserting and fixing a feeding pipe into the drilled hole, the feeding pipe being for feeding a functional agent solution into the drilled hole; a feeding step S3 for feeding the functional agent solution into the drilled hole through the feeding pipe from a storage tank storing the functional agent solution and being installed at a location higher than the feeding pipe; and a replenishment step S6 for replenishing the functional agent solution into the storage tank at each preset time or when a solution level of the functional agent solution falls below the preset solution level in the storage tank, during a preset period.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a concrete structure that suppresses deterioration of a cracked portion caused by deterioration causes such as alkali aggregate reaction (hereinafter referred to as ASR [Alkali Silica Reaction]), salt damage, freezing and thawing, and neutralization. The present invention relates to an injection reforming method.

  In general, deterioration of concrete due to ASR causes reactive aggregates to swell due to moisture in the concrete and generate cracks. From the cracked portion of the concrete surface, the cracked portion further spreads and spreads due to the penetration of moisture by rainwater and groundwater. It is said that filling with lithium nitrite is effective as a countermeasure against concrete deterioration due to such ASR (see, for example, Patent Documents 1 and 2). In addition, it has been reported that the filling with lithium nitrite involves a high-pressure injection operation for 10 to 60 days at a pressure of 0.5 Mpa.

  Moreover, deterioration of the concrete structure due to salt damage is caused by generating cracks in the concrete when the passive film of the reinforcing bars disappears due to the entry of salt and the reinforcing bars rust and swell. And the penetration | invasion of the salt content and water | moisture content from a crack part promotes the increase in the rust of a reinforcing bar, and deterioration progresses further. As countermeasures against such salt damage, it is generally performed to inject a resin into the cracked part (see, for example, Patent Document 3), or to perform anticorrosion as a long-term countermeasure (for example, (See Patent Document 4).

  In addition, deterioration of concrete due to freezing and thawing freezes water that has entered the concrete and causes volume expansion, causing the concrete to peel and peel off. If there is a crack, deterioration proceeds due to the expansion of the intrusion water. As a countermeasure for freezing and thawing, a surface coating method is generally performed (for example, see Patent Document 5).

Furthermore, concrete deterioration due to neutralization is a phenomenon in which concrete changes from alkaline to neutral due to the action of carbon dioxide in the air. When the concrete is neutralized, the passive coating on the internal reinforcing bars disappears and rust occurs. . Therefore, as with salt damage, cracks are generated in the concrete and deterioration is promoted by the ingress of moisture. Such neutralization countermeasures are generally dealt with by surface coating or realkalization.
As described above, the cause of deterioration of the concrete structure is largely caused by the generation of cracked parts and the influence of moisture and carbon dioxide gas entering from there. In addition, the above-described individual examples and those individual examples are combined to generate a serious problem that the concrete structure deteriorates in combination.

  Therefore, conventionally, it is possible to suppress deterioration due to moisture permeating into the cracked portion of the concrete structure, and it is possible to fill the cracked portion with filler, and air (oxygen and carbon dioxide) is supplied to the cracked portion. There has been proposed a method for repairing a concrete structure that can suppress deterioration due to the intrusion of (see Patent Document 6). In this method of repairing a concrete structure, a hole is formed in the wall surface of the concrete structure, the repair liquid is filled in the hole, and pressure is applied to allow the repair liquid to penetrate into the cracked portion.

JP-A-2005-060144 Japanese Patent Laid-Open No. 2005-248637 JP 2002-357000 A JP 2003-301533 A JP 2007-169100 A JP 2009-249943 A

  However, the conventional method for repairing a concrete structure has room for improvement as described below. In the conventional repair method for concrete structures, pressure is applied to force the repair liquid to penetrate into the cracked part of the concrete structure, but there are parts that can be penetrated properly and parts that cannot be penetrated depending on the crack width of the cracked part. There was a case. In addition, applying high pressure to cracks in a concrete structure can be expected to widen the crack width and enhance the injection effect, but it basically contributes to concrete expansion and may cause structural damage.

  The present invention has been made in view of the above-described points, and does not depend on the crack width of the crack portion of the concrete structure, and it is possible to suppress the deterioration of the concrete structure without causing structural damage. It is an object to provide a reforming method.

  A method for injecting and reforming a concrete structure according to an embodiment of the present invention includes a drilling step for forming a hole in a wall surface of a concrete structure, and supplying a functional agent liquid that suppresses deterioration of the concrete structure to the hole. A pipe fixing step of inserting and fixing a supply pipe into the perforation, and supplying the functional agent liquid into the perforation through the supply pipe from a storage tank that stores the functional agent liquid and is installed at a position higher than the supply pipe. And supplying the functional agent liquid to the storage tank at a preset time period or at a preset time or when the level of the functional agent liquid falls below a preset level. And a replenishment step of replenishment.

  In the method for injecting and reforming a concrete structure according to the embodiment of the present invention, the functional agent liquid is supplied into the perforations by hydraulic pressure from a storage tank installed at a position higher than the supply pipe, and cracks and the like that continue in the perforations It is repaired. In other words, when cracks and the like are continuous in the perforations, the functional agent liquid can be supplied from the gaps in the cracked portions or permeated by capillary action by always filling the functional agent liquid into the perforations. It becomes possible.

The concrete structure injection reforming method according to the present invention can provide the following excellent effects.
In the method of injecting and reforming a concrete structure, a functional agent liquid is supplied into a perforation formed in a concrete structure by a hydraulic pressure from a storage tank formed at a position higher than a supply pipe, and the inside of the perforation is previously filled with the functional agent liquid. It is possible to suppress the deterioration of the concrete structure by filling in the set period and ensuring that the functional agent liquid penetrates into the cracked portion by capillary action even if the width of the cracked portion is small.

It is sectional drawing which shows typically the state which installed the repair apparatus used with the injection | pouring reforming method of the concrete structure of 1st Embodiment which concerns on this invention. It is a front view which shows typically the fixed state of the supply pipe used with the injection | pouring reforming method of the concrete structure of 1st Embodiment which concerns on this invention. It is a schematic diagram which shows an example of the drilling apparatus which forms a hole in the injection | pouring reforming method of the concrete structure of 1st Embodiment which concerns on this invention. It is sectional drawing which forms a hole in the concrete structure which concerns on 1st Embodiment which concerns on this invention, and shows an internal state typically. It is a flowchart which shows the injection | pouring reforming method of the concrete structure which concerns on 1st Embodiment which concerns on this invention. It is a schematic diagram which shows typically the repair management apparatus used for the injection | pouring reforming method of the concrete structure which concerns on 2nd Embodiment which concerns on this invention. It is explanatory drawing which illustrates the content of the data used with the injection | pouring reforming method of the concrete structure which concerns on 2nd Embodiment which concerns on this invention. It is a flowchart which shows the injection | pouring reforming method of the concrete structure which concerns on 2nd Embodiment which concerns on this invention.

  Hereinafter, a concrete structure injection reforming method according to each embodiment will be described with reference to the drawings. The drawings referred to in the following description schematically show the respective embodiments, and therefore the scale, spacing, positional relationship, etc. of each member are exaggerated, or some of the members are not shown. There may be. Moreover, in the following description, the same name and code | symbol indicate the same or the same member in principle, and shall omit detailed description suitably. Furthermore, the directions shown in each figure indicate relative positions between components, and are not intended to indicate absolute positions.

<First Embodiment>
In the method for injecting and reforming a concrete structure, a perforation device 30 is used to form a perforation on the wall surface of the concrete structure 100 and the functional agent liquid R is injected into the concrete structure 100 using the functional agent liquid supply device 1 to provide a concrete structure. Repair is performed by suppressing deterioration of the object 100. The functional agent liquid supply device 1 used here includes a storage tank 2 for the functional agent liquid R and a supply pipe 10 for supplying the functional agent liquid R from the storage tank 2.

  An existing device can be used for the punching device 30. For example, as shown in FIG. 3, the drilling device 30 includes a fixed portion 31 that is fixed to a wall surface of the concrete structure 100, a movable portion 32 that is provided continuously to the fixed portion 31, and the movable portion 32. A guide bar 33 provided on the drill bar 34, a drill main body 34 that moves along the guide bar 33, a core bit 35 that is provided on the drill main body 34 and has a cutting edge made of diamond grains, and a drill main body 34 that serves as the guide bar 33. A handle 36 that mainly moves up and down is mainly provided. The perforating apparatus 30 uses a fixing mechanism CA such as a vacuum pump when the fixing unit 31 is fixed by vacuum suction. Further, the perforating apparatus 30 uses a water circulation mechanism WK that circulates cooling water when the perforation H is formed.

  The punching device 30 is fixed to the wall surface via the fixing portion 31 and adjusts the angle of the movable portion 32 to perform the punching operation. The drilling device 30 performs the drilling operation by circulating the cooling water using the water circulation mechanism WK. That is, during the drilling operation, cooling water is supplied from the water circulation mechanism WK to the distal end side of the core bit 35, and the sludge mixed with the generated chips of concrete and cooling water is collected through the circulation path, and the sludge collected through the filter. The cooling water is separated from the water and supplied again to the tip side of the core bit 35 through the circulation path. Moreover, the perforation apparatus 30 forms the perforation H so that the reinforcing bar previously provided in the concrete structure 100 may be avoided. The perforation apparatus 30 can form the perforation H while avoiding the reinforcing bars by adjusting the position of the perforation H based on the information when the concrete structure 100 is manufactured.

  As shown in FIG. 4, the drilling device 30 can be formed so that the drilling length (depth) L1 is, for example, 1000 to 12000 mm. When it is desired to increase the perforation length L1 with the perforation apparatus 30, it is possible to use a connection bit (a metal pipe having connection portions at both ends) that connects the core bit 35 in the length direction. In the perforating apparatus 30, the perforation H is formed in a perforation length L1 so as not to penetrate the concrete structure 100 with a diameter φ in the range of 9 to 25 mm. In the concrete structure 100, the perforations H are formed at a predetermined interval. For example, the perforations H are formed at intervals of 200 to 1000 mm. Furthermore, it is preferable that the perforations H are formed in a range of an inclination angle θ that is inclined toward the ground with respect to the wall surface in a range of 10 to 70 degrees. By forming the perforations H with an inclination angle θ, the functional agent liquid R to be filled can always be continuously filled into the perforations H from the hole bottom to the hole opening.

  As shown in FIG. 1, the storage tank 2 is installed on an upper surface or a wall surface of a concrete structure 100 or a member attached to the concrete structure. In the drawings, the storage tank 2 is described as being fixed to the side wall surface of the concrete structure 100. The storage tank 2 has a pipe connection for connecting a storage part 3, a lid part 4 detachably provided in a tank opening formed above the storage part 3, and a supply pipe 10 provided below the storage part 3. And an opening / closing valve 6 provided in the pipe connecting portion 5. The storage tank 2 desirably has such a size that the functional agent liquid R remains in the storage portion 3 even when the functional agent liquid R is supplied into the plurality of perforations H and becomes full. In addition, the storage tank 2 is provided with a remaining amount meter for visually confirming the remaining amount of the functional agent liquid R stored from the outside, a detection means such as a liquid level detection sensor, and a window for visually confirming the remaining amount of the inside. It is preferable to form. Here, the storage tank 2 is fixed to the wall surface of the concrete structure 100 by the mounting jig 7 and the post-construction anchor 8.

  As shown in FIGS. 1 and 2, the supply pipe 10 supplies the functional agent liquid R from the storage tank 2 to the perforations H. The supply pipe 10 is provided so as to be connected to a position where it can be inserted into each perforation H via the connecting branch member 11. The supply pipe 10 has a fixing jig 15 attached to the tip thereof, and is fixed to the perforation H through the fixing jig 15. The supply pipe 10 is preferably transparent or translucent so that the state inside the pipe can be visually recognized. Further, the supply pipe 10 is preferably surface-treated so that the functional agent liquid R passing therethrough is not affected by light from the sun. In addition, it is preferable that the supply pipe 10 is provided with a chemical-resistant material or an inner surface treatment corresponding to the functional agent liquid R to be used. Further, the thickness of the supply pipe 10 installed between the storage tank 2 and the connecting branch member 11 and the connecting branch member 11 is made larger than the thickness of the pipe installed between the connecting branch member 11 and the perforation H. It is preferable.

  The connecting branch member 11 connects the supply pipes 10 so that the supply pipes 10 can be inserted at the positions of the perforations H. The connecting branch member 11 connects a portion connecting the supply pipe 10 from above, a portion connecting the supply pipe 10 inserted into the perforation H, and a supply pipe 10 connected to the other connecting branch member 11 below. And a part. Further, the connecting and branching member 11 caps a portion where the supply pipe 10 is not connected, so that it is not necessary to use all the connecting portions and the functional branch liquid R can be used without leaking. As long as the connecting branch member 11 can connect the supply pipe 10 and increase the number of branched supply pipes, the number, shape, configuration, and the like are not limited.

  As shown in FIG. 4, the fixing jig 15 has a configuration capable of fixing the supply pipe 10 in a state where the supply pipe 10 is inserted into the perforation H. The fixing jig 15 is a wedge-shaped member made of, for example, silicon rubber, and is formed so that the other end side is larger in diameter than the one end side and thicker than the supply pipe 10. The fixing jig 15 has an insertion hole through which the supply pipe 10 can be inserted continuously at one end side and the other end side. Therefore, the supply pipe 10 is in a state where it is inserted into the perforation H and fixed in a state where one end of the supply pipe 10 is inserted into the insertion hole of the fixing jig 15.

  The functional agent liquid R penetrates into the crack C existing inside the concrete structure 100 and prevents the crack C of the concrete structure 100 from expanding. This functional agent solution R has at least one function such as suppression of alkali-aggregate reaction, suppression of salt damage, fixation of chloride ions, and suppression of neutralization by alkali supplementation. As the functional agent liquid R, for example, a concrete modifier and a permeable absorption inhibitor are used. Moreover, as the functional agent liquid R, for example, an alkali aggregate reaction countermeasure agent or a salt damage countermeasure agent is used. As an example of the concrete modifier, lithium silicate, sodium silicate, or the like is used. As the permeable absorption inhibitor, for example, a silane material, a silane siloxane material, or the like is used. Further, as a salt damage countermeasure agent, lithium-containing zeolite, lithium nitrite, hydrogen peroxide solution, calcium propionate and the like are used. These functional agent liquids R are used in a liquid or cream state. In addition, the functional agent liquid R is used in a state where the viscosity is low so that the functional agent liquid R can enter the portion of the crack C2 having a small width. By causing the functional agent solution R to permeate the cracked portion C and then plugging the perforations H as necessary, causes of deterioration such as ASR, salt damage, freeze-thawing, and neutralization are improved.

Next, a method for injecting and reforming a concrete structure will be described below.
As shown in FIG. 5, the concrete structure injection reforming method S includes at least a drilling step S1, a pipe fixing step S2, a supply step S3, and a replenishment step S6.
The drilling step S <b> 1 is a step of forming a hole in the wall surface of the concrete structure 100. In this drilling step S1, the drilling H is formed using the punching device 30. In the drilling step S1, for example, the drilling device 30 is fixed to the wall surface of the concrete structure 100 via the fixing mechanism CA. Then, the drilling operation is performed in a state where the movable portion 32 of the drilling device 30 is set to a predetermined angle and the movable portion 32 is fixed. The drilling operation is performed while supplying cooling water to the distal end side of the core bit 35 through the water circulation mechanism WK. The perforations H formed in the perforation step S <b> 1 are formed so as not to penetrate the concrete structure 100. Here, for example, when the length when the concrete structure 100 is penetrated at a predetermined angle is 100%, the perforations H are formed in a range of 50 to 90%.

  In the drilling step S1, a plurality of drill holes H having a diameter of 5 to 25 mm are formed on the wall surface of the concrete structure 100 at intervals of 300 to 1000 mm. In addition, as shown in FIG. 2, the concrete structure 100 is described as a state in which perforations H of 6 rows and 3 columns are formed as an example here, but the number and positions of the perforations H to be formed are limited. Not what you want. In addition, the inclination angle θ of the perforation H formed in the perforation step S1 is in a range of 0 ° ≦ θ ≦ 90 ° when the vertical direction is 90 °. Here, the inclination angle θ is preferably in the range of 10 degrees to 70 degrees, and more preferably in the range of 20 degrees or 50 degrees. By forming the perforations H at the inclination angle θ, the functional agent liquid R is always filled in the perforations H by the hydraulic pressure. When the inclination angle θ is 0 degrees, the horizontal perforation H is orthogonal to the wall surface. When the inclination angle θ is 90 degrees, the perforation H is formed perpendicular to the upper surface orthogonal to the wall surface. It shows that it becomes.

In addition, it is preferable to perform the washing | cleaning process S0 which wash | cleans the wall surface of the concrete structure 100 before performing drilling process S1. In the cleaning step S0, for example, the wall surface is cleaned by spraying the wall surface under a predetermined water pressure. By performing the cleaning step S0, dirt such as dust adhering to the wall surface of the concrete structure 100 is removed, the drilling device 30 can be easily fixed to the wall surface, and the fixing state can be stabilized. It becomes possible. Moreover, the presence or absence of the crack C is known on the surface of the concrete structure 100 by performing washing | cleaning process S0. And as a result of performing washing | cleaning process S0, when the crack C of 0.1 mm or more is confirmed on the surface of the concrete structure 100, a sealing work (sealing process) is performed. The sealing work needs to be performed in order to prevent the supplied functional agent liquid R from bleeding from the surface of the concrete structure 100.
When the cleaning step S0 is performed and the drilling step S1 is completed, a pipe fixing step S2 is performed.

  The pipe fixing step S2 is a step of fixing the supply pipe 10 to the perforation H. In this pipe fixing step S2, the fixing jig 15 is attached to one end of the supply pipe 10, and the opening of the hole H is opened against the elastic force of the fixing jig 15 in a state where the tip of the supply pipe 10 is inserted in the hole H. The supply pipe 10 is fixed by inserting a fixing jig 15 into the pipe. The fixing jig 15 is formed of an elastic member such as silicon, and one end side is formed larger in diameter than the opening of the perforation H. Therefore, the supply pipe 10 can be fixed by being inserted into the perforation H. . This pipe fixing step S2 is performed together with or before or after the step of installing the storage tank 2 and the step of connecting the supply pipe 10.

  The step of installing the storage tank 2 is a step of installing the storage tank 2 at a position higher than the supply pipe 10. Here, the storage tank 2 is disposed at a position higher than the supply pipe 10 on the wall surface of the concrete structure 100 and is attached to a position where the functional agent liquid R can be put into the perforations H by hydraulic pressure. As an example, the storage tank 2 is configured to be attached to the side wall surface of the concrete structure 100 by the attachment jig 7 and the post-construction anchor 8. In addition, although the bolt hole is formed in the side wall surface of the concrete structure 100 by using the post-installed anchor 8, when the storage tank 2 is removed, all the successful anchors are removed after being used for fixing the anchor. The hole can be plugged with a concrete material to prevent deterioration from the anchor hole.

  The step of connecting the supply pipe 10 is a step of connecting between the storage tank 2 and the supply pipe 10 fixed to the perforation H via the fixing jig 15. In this step, the other supply pipe 10 and the connecting branch member for connection are connected between the other end of the supply pipe 10 fixed to the perforation H or the pipe connection portion 5 of the storage tank 2. 11 to connect. The supply pipe 10 has a connection to the pipe connection portion 5 of the storage tank 2, a connection to the connecting branch member 11, and a connection to the supply pipe 10 fixed to the perforation H via the fixing jig 15. Any order may be used. That is, any of the pipe fixing step S2, the step of installing the storage tank 2, and the step of connecting the supply pipe 10 may be performed first. When the step of installing the storage tank 2 and the step of connecting the supply pipe 10, which are the pipe fixing step S2, are completed, the supply step S3 of the functional agent liquid R is performed.

  Supply process S3 is a process of supplying the functional agent liquid R stored in the storage tank 2 via the supply pipe 10 fixed to the perforation H. In the supply step S3, the functional agent liquid R stored in the storage tank 2 is supplied to the perforation H through the supply pipe 10 by operating the opening / closing valve 6. The storage tank 2 is installed at a position higher than the supply pipe 10, thereby lowering the functional agent liquid R by the hydraulic pressure and supplying the functional agent liquid R into the perforation H through the connecting branching member 11 and the supply pipe 10. Yes. When a crack C is generated so as to be continuous with the perforation H, the functional agent liquid R penetrating into the crack C is required to be added to the total volume of the perforation H.

  In particular, the storage amount of the functional agent liquid R stored in the storage tank 2 at first is unknown as to how many cracks C that are not visible in the concrete structure 100 are present. Absent. Therefore, the functional agent liquid R is put into the storage tank 2, and the functional agent liquid R is filled in the storage tank 2, and the time is set for several minutes. And it is preferable to fill the storage tank 2 again with the functional agent liquid R after several minutes have passed. The amount of the functional agent liquid R supplied to the perforations H is initially large due to the presence of cracks C communicating with the perforations H, and thereafter, the first supply amount is often not required. That is, when the crack C is large, the functional agent liquid R immediately penetrates into the cracked C portion, so that the supply of the functional agent liquid R in an amount to enter the crack C is necessary together with the amount to fill the space of the perforations H. Become. Further, when the crack C is small, it takes time to penetrate, and the functional agent liquid R is difficult to penetrate immediately. Therefore, at the beginning of supplying the functional agent liquid R, after a few minutes have elapsed, the amount of storage in the storage tank 2 is confirmed again and the functional agent liquid R is put in again, so that a large crack C can be immediately functioned. The chemical solution R is infiltrated, and the small crack C is gradually infiltrated by a capillary phenomenon or the like. The replenishment step S6 is performed after the supply step S3.

  The replenishment step S6 is a step of filling the storage tank 2 with the functional agent liquid R. In the replenishment step S6, a time limit is determined in advance from the state in which the functional agent liquid R is stored in the storage tank 2, and the function agent liquid R is set to be replenished within the determined time limit. For example, when the time limit for supplying the functional agent liquid R is one year, the functional agent liquid R is periodically replenished during one year from the setting. Here, as the replenishing step S6, when the set period is one year, for example, the functional agent solution R is filled once every two months. The replenishment step S6 is performed when the determination of the elapse of a predetermined time (determination step S4) and the determination of the liquid level (liquid level determination step S5) are Yes. That is, it is determined whether or not the set time has elapsed. If the time has not elapsed (No in S4), the elapse of a predetermined time is awaited. Moreover, when time passes (Yes of S4) and it determines with an operator confirming a liquid level visually (liquid level determination process S5) (Yes of S5), the functional agent liquid R is carried out. The storage tank 2 is replenished (S6). That is, it is determined that the operator who has visually observed is not replenished unless the state of the functional liquid R stored in the storage tank 2 is lower than the reference liquid level (predetermined liquid level), and is lower than the reference liquid level. If it is (Yes in S5), the functional agent liquid R is replenished so as to become the reference liquid surface (S6). When the functional agent liquid R is in the same state as the reference liquid level (No in S5), the height of the liquid level in the storage tank 2 is determined two months after the next determination timing. This replenishment step S6 is repeated until the set period elapses (S7).

  By performing such a replenishment step S6, when there is a small crack C2 (see FIG. 4) communicating with the perforation H, the fluid pressure of the functional agent liquid R is always applied from the height with the storage tank 2. Therefore, the functional agent liquid R can be surely permeated into the crack C2 by the capillary phenomenon. Here, the crack C1 indicates that there is a gap exceeding 0.1 mm, and the crack C2 indicates that the gap between 0.1 and 0.05 mm is small (both cracks are indicated by C). ing). Such small cracks C2 are difficult to penetrate even if pressure is forced for a short time (within one week) due to the effect of the surface tension of the functional agent solution R. Is suitable to do. Then, by continuously carrying out a state in which the capillary phenomenon occurs for a long period (one month or more), the functional agent liquid R is permeated into a minimal crack C2 such as ASR, for example. Further, when the functional agent liquid R is, for example, a silane-based surface impregnating material, a water absorption preventing layer that is a water repellent layer is formed by impregnating the concrete surface in the crack C. In short, not only clogging the concrete crack C on the concrete surface with the sealing seal, but also forming a water absorption prevention layer on the concrete surface in the crack C, which is the biggest cause of concrete deterioration, mainly preventing moisture intrusion. Can do.

As described above, in the concrete structure injection reforming method S, the storage tank 2 is installed at a position higher than the perforation H, and the functional agent liquid R is supplied into the perforation H by the supply pipe 10. The functional agent liquid R can be infiltrated into the crack C communicating with H. In the concrete structure injection reforming method S, in particular, when the crack C is a crack C2 having a small gap, the concrete structure 100 is surely deteriorated more than the present by allowing it to permeate through capillary action over time. Can be prevented.
In addition, the concrete structure injection reforming method is formed by inclining and forming the end of the drilling hole below the drilling opening with respect to the wall surface, or by making the tilt angle of the drilling hole constant or changing it. The functional agent liquid can be effectively infiltrated into the cracked portion.
In addition, in the concrete structure injection reforming method S, the functional agent liquid R is infiltrated into the crack C by the natural capillary phenomenon with the hydraulic pressure due to the height of the storage tank 2, thereby reducing the burden on the concrete structure 100. be able to. In addition, after the modification of the inside of the concrete structure 100, it is possible to inject the filling filler by using the functional agent liquid R used for the modification. It is more desirable to use a concrete-based injection material of the same quality as the concrete after the concrete modification.

Next, a concrete structure injection reforming method according to the second embodiment will be described with reference to FIGS. In addition, about the structure and procedure which were already demonstrated, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.
As shown in FIG. 6, the concrete structure injection reforming method SA includes a sensor 50 installed in the storage tank 2, and a management device 60 that manages the replenishment timing of the functional agent liquid R by a signal from the sensor 50. The maintenance time is managed using a management system KS including the repair, and the functional agent solution supply device 1 performs the repair. That is, in the concrete structure injection reforming method SA, the timing of the replenishment of the functional agent liquid R is managed by a signal from the sensor 50, so that the functional agent liquid R is always supplied into the perforations H within a predetermined period. Fill and repair.

Hereinafter, each configuration of the management system KS including the sensor 50 and the management device 60 will be described.
The sensor 50 detects the height of the liquid surface of the functional agent liquid R stored in the storage tank 2. The sensor 50 may be a known sensor such as a non-contact type optical sensor, an ultrasonic sensor, or a contact type float type water level gauge. The sensor 50 is configured to output a signal and contact the management device 60 when it reaches a preset value. The signal sent from the sensor 50 is configured to send information combined with an identification number for identifying the place where the sensor 50 is installed as a signal.

The management device 60 manages the state of the functional agent liquid R that repairs the concrete structure 100 by receiving a signal from the sensor 50 with the antenna 61. The management device 60 mainly includes an input unit 62, a data update unit 63, a storage unit 64, a timer 65, a data list display unit 66, an output unit 67, and a setting unit 68.
The input unit 62 is an interface for inputting a signal from the sensor 50 received by the antenna 61. The input unit 62 outputs the input signal to the data update unit 63.

  The data update unit 63 receives a signal from the input unit 62 and updates the data stored in the storage unit 64. The data updating unit 63 refers to the identification number from the received signal, and updates the data in the storage unit 64 corresponding to the referenced identification number together with the time data from the timer 65. In addition, the data update unit 63 sets (sets to 1) a flag to the data to be updated. Further, the data update unit 63 sends a signal indicating that the update has been made to the data list display unit 66.

  The storage unit 64 stores data set by the setting unit 68 and stores data updated by the data update unit 63. Here, the storage unit 64 stores a plurality of concrete structures 100 that need to be repaired, for example, in a list or table format as shown in FIG. In the list or table format, items such as identification number, functional agent liquid type, location, item type, installation date / time, elapsed days, replenishment signal reception date, replenishment date / time, and setting period are described and stored. The storage unit 64 is a general storage unit such as a hard disk or an optical disk.

  The data list display unit 66 displays the data stored in the storage unit 64 on the monitor 69 in response to a signal from the setting unit 68. In addition, when the data list display unit 66 receives a signal from the data update unit 63, the data list display unit 66 acquires data again from the storage unit 64 and displays the data newly updated by the data update unit 63 on the monitor 69. The data list display unit 66 is configured to display the data in which the flag in the list displayed on the monitor 69 is set more prominently than other data. For example, the data list display unit 66 displays the data by changing the color of the data for which the flag is set (data that requires the functional agent liquid R), blinking the data, or the like. Note that the data with the flag set is reset (set to 0) via the setting unit 68 when the replenishment is completed.

The setting unit 68 sets data to be stored in the storage unit 64. The setting unit 68 sets and stores data in the storage unit 64 by input means such as a keyboard, a mouse, and a scanner, and inputs and edits data displayed on the monitor 69 by the data list display unit 66. The flag set by the data update unit 63 is reset.
The output unit 67 is an interface that receives a signal from the data list display unit 66 and outputs data to the monitor 69.
The management device 60 described above can be configured by a storage unit such as a CPU and a hard disk of a personal computer.

Next, a concrete structure injection reforming method SA will be described with reference mainly to FIGS.
As shown in FIGS. 3 and 8, in the concrete structure injection reforming method SA, the perforation H is formed in the concrete structure 100 by the perforating apparatus 30, the supply pipe 10 and the storage tank 2 are installed, and set in advance. During the set period, the functional agent liquid R is supplied into the perforation H by the supply pipe 10 by replenishing the storage tank 2. In the concrete structure injection reforming method SA, the perforating step S1, the pipe fixing step S2, and the supplying step S3 are performed (the cleaning step S0), and the functional agent is provided by the sensor 50 provided in the storage tank 2. The replenishment step S6A is performed when the liquid level determination step S5A for determining whether or not the level of the liquid R has reached a predetermined value or less is Yes. In the concrete structure injection reforming method SA, the liquid level determination step S5A and the replenishment step S6A are performed within the period set in the set period determination step S7A. Further, in this concrete structure injection reforming method SA, the determination step S4 according to time is not performed here.

  In the concrete structure injection reforming method SA, the liquid level determination step S5A, the replenishment step S6A, and the set period determination step S7A are managed by the management device 60. That is, when a signal is sent from the sensor 50, the management device 60 inputs the signal received by the antenna 61 from the input unit 62 and sends it to the data update unit 63. In the management device 60, the data update unit 63 updates the target data from the storage unit 64 by adding the time information of the timer 65 with reference to the identification number from the input signal. Further, when the data update unit 63 updates the data, the management device 60 sets a flag in the updated data and sends a signal to the data list display unit 66 indicating that the data has been updated. When the data list is displayed by the data list display unit 66 on the monitor 69 via the setting unit 68, the management device 60 displays the data that needs to be supplemented by blinking or changing the color depending on the flag.

In the management device 60, when the functional agent liquid R is replenished to the storage tank 2 in the place where it is actually installed based on the data to be replenished displayed on the monitor 69, replenishment that has been replenished by the operator. The date and time is input via the setting unit 68, and the data flag is reset. The management device 60 manages the repair work of the concrete structure 100 by repeatedly performing the liquid level determination step S5A and the replenishment step S6A in the set period determination step S7. In addition, when it becomes Yes in setting period determination process S7A, the color of the preset which shows completion | finish of repair is shown by setting the flag of the item which suggests completion of repair work to data via the setting part 68 by an operator. Will be shown.
As described above, the method for injecting and reforming a concrete structure accurately manages a plurality of repaired portions by detecting the level of the functional agent liquid R based on a signal from the sensor 50 provided in the storage tank 2. The functional agent liquid can always be supplied into the perforations H, and the functional agent liquid R can be permeated into the cracked C portion. Further, in the concrete structure injection reforming method SA, the replenishment timing of the functional agent liquid R is determined based on the signal from the sensor 50, and therefore it is useless even if the state of the crack C is different for each concrete structure 100. It is possible to accurately replenish the functional agent solution R without patrol.

In the first embodiment and the second embodiment, the inclination angle θ of the perforation H is described as being formed at a constant angle. However, the following inclination angle and arrangement may be used.
That is, the perforations H may be formed from the wall surface of the concrete structure 100 and the wall surface facing the wall surface, and the perforations H may be formed at positions where they do not overlap each other.
Further, the perforations H may be formed at different inclination angles. Furthermore, when a plurality of perforations H are formed, the perforation H may be formed so that the inclination angle of each perforation H is different for each preset group. In addition, when changing inclination | tilt angle (theta) for every group, in the structure which is an example of the group aligned in the row direction of the upper end side and the lower end side of the concrete structure 100, for example, 6 rows 3 columns, In the fifth and sixth lines, the inclination angle θ may be decreased, and in the third and fourth lines on the center side, the inclination angle θ may be increased more than the upper and lower ends. That is, by changing the inclination angle θ for each preset group, the functional agent liquid R can be injected corresponding to the structure of the concrete structure and penetrated into the crack C.
By adopting such a configuration, it is possible to repair the concrete structure 100 by suppressing the cause of deterioration of the concrete structure 100 by injecting the functional liquid R corresponding to the state of many cracks C in the concrete structure 100. It becomes.

  The method for injecting and reforming a concrete structure according to the embodiment can be used for repairing a concrete structure such as a bridge, a tunnel, a nuclear power plant, a dam, and a dike.

DESCRIPTION OF SYMBOLS 1 Functional agent liquid supply apparatus 2 Storage tank 3 Storage part 4 Lid part 5 Pipe connection part 6 On-off valve 6a Connection surface 6b Tip end surface 7 Mounting jig 8 Post-construction anchor 10 Supply pipe 11 Connecting branch member 15 Fixing jig 30 Punching device 31 Fixed part 32 Movable part 33 Guide bar 34 Drill body 35 Core bit 36 Handle 50 Sensor 60 Management device 61 Antenna 62 Input part 63 Data update part 64 Storage part 65 Timer 66 Data list display part 67 Output part 68 Setting part 69 Monitor 100 Concrete structure Material C Crack CA Fixing mechanism H Drilling KS Management system R Functional agent liquid S0 Cleaning process S, SA Concrete structure injection reforming method S1 Drilling process S2 Pipe fixing process S3 Supply process S4 Determination process S5 Liquid level determination process S6 Replenishment process S7 Setting period judgment process WK water circulation mechanism

Claims (5)

A perforation process for forming perforations on the wall of the concrete structure;
A pipe fixing step for inserting and fixing a supply pipe for supplying a functional agent liquid to the perforations;
Supplying the functional agent liquid into the perforations through the supply pipe from a storage tank that stores the functional agent liquid and is installed at a position higher than the supply pipe;
A replenishment step of replenishing the functional agent liquid in the storage tank at a preset time period or when the functional liquid level falls below a preset liquid level height within a preset period; A method for injecting and reforming a concrete structure so as to include.   2. The injection reforming of a concrete structure according to claim 1, wherein the perforating step forms the perforation by inclining with respect to a wall surface of the concrete structure, and the perforation end is located below the perforation opening. Method.   2. The method for injecting and reforming a concrete structure according to claim 1, wherein the perforating step forms the perforation so as not to penetrate a wall surface facing the wall surface of the concrete structure.   The drilling step is performed with a drilling tool fixed to a wall surface, and the drilling tool fixes a guide plate to the wall surface, and a fixed portion of the tool main body is vacuum-sucked to the fixed guide plate to incline the tool body to the wall surface. The method for injecting and reforming a concrete structure according to claim 2 or 3, wherein the perforation is carried out by fixing in a state.   In the replenishment step, when the functional agent liquid is replenished to the storage tank when the liquid level of the functional agent liquid is lower than a preset level, the liquid level height is measured by a sensor provided in the storage tank. 2. The method for injecting and reforming a concrete structure according to claim 1, wherein the functional agent liquid is replenished when the value is detected and deviates from a preset numerical value.

Images