KR100886922B1 - Footing reinforcing or structure recovering method - Google Patents

Abstract

A structure foundation reinforcing or repairing method is provided to improve the effectiveness of installation and disassembling. A structure foundation reinforcing or repairing method comprises; a step for directly forming the perforation hole(210) to the downward in the ground(200) of underpinning or the repaired part; a step that sets up in order to be protruded to the perforation hole upward; a step for raising the internal force confirmation by reinforcement or the basis; a step for finishing with closure perforation hole.

Description

Structure reinforcement or repair method {FOOTING REINFORCING OR STRUCTURE RECOVERING METHOD}

The present invention relates to a structure foundation reinforcement or repair method. More specifically, the present invention relates to a method for effectively reinforcing and repairing a foundation of a structure, such as a method of constructing a pile on a foundation in a limited space or a new structure such as an existing basement floor plate, and reinforcing and pulling the foundation.

1a to 1e schematically show a construction for reinforcing a foundation of a structure by constructing a pile in a conventional basement floor plate.

First of all, as shown in Figure 1a and Figure 1b is generally the base plate is made of concrete, so first, only the base plate 10 is cored using a drilling machine (excavator).

The core ring hole 20 is perforated in the form of a wide top and a narrow bottom thereof, the lower portion of the core ring hole 20 is the ground (30) where the structure is located, the soil layer, weathered soil layer or rock layer and It exists in the same various ground state.

At this time, since it is difficult to bring the reinforcement body 40 such as a steel pipe pile into the basement floor plate to reinforce the base plate, usually, the reinforcement body 40 is brought in by segmenting (1-1.5m), and the segmented reinforcement body Using a method of press-fitting into the ground (30) using a press-fit means 50 such as a hydraulic jack.

First, as shown in FIG. 1C, a reaction force body 60 capable of installing the press-fitting means 50, which is a hydraulic jack having a capacity to press-fit the reinforcement body 40, has a lower end on the bottom of the core ring hole 20. It is installed to hang but is installed to extend to the top of the core ring hole (20).

The reaction body 60 is divided into two anchor rods (61, 62) as shown in Figure 1g to be connected by a connecting nut (63), a lower A-shaped acupressure plate (64) at the bottom of the lower anchor rod (62) To be mounted, the upper end of the anchor rod 61 is used to be fixed by the fastening nut 66 to the reaction plate (65) is used.

The anchor rods 61 and 62 are connected to each other by the connection nut 63 in consideration of the length of the hydraulic cylinder constituting the hydraulic jack, which is the press-fit means 50, as described below. It is to be able to easily adjust the extension length of, but to avoid the constraints of the limited space of the basement floor plate.

Accordingly, as shown in FIG. 1D, a reinforcement body 40, such as a steel pipe pile, is inserted into the core ring hole 20, and the hydraulic jack is press-fitted between the upper end of the reinforcement body 40 and the reaction force plate 65 constituting the reaction force body 60. The means 50 is installed, and the hydraulic jack is operated to support the reaction force plate 65 while the hydraulic cylinder 51 protrudes, so that the reinforcement 40 is press-fitted into the ground 30 by the reaction force. The reinforcement 40 is press-fitted to the support layer (A) in the bottom of the final ground so as to secure the required supporting force.

Next, as shown in FIG. 1E, the anchor rods 61 and 62 constituting the reaction force body 60 and the reinforcement body 40, which is a steel pipe pile, are integrated with each other to weld the reinforcement body 40 to the basement floor plate. To be fixed. In other words, installing a new file on the basement floor.

Next, the anchor nuts (61, 62) and the reaction force plate (65) are disassembled by loosening the connection nut (63), and the fixing plate (70) is installed at the top of the core ring hole (20). ) Is fixed to the fixing plate 70 by using the fastening nut (80).

Finally, the filling material 90 such as mortar is filled in the core ring hole 20 to close the upper surface of the basement plate so that the basement plate reinforcement is completed.

However, in the case of such reinforcement work, the reinforcement is pressed into the ground by the press-fitting means because it works in the limited space, but in the case of the rock, it is never easy to penetrate it with the steel pipe pile, and the construction speed is low. There was a problem that would fall very much.

In addition, when the capacity of the press-fit means is used, the construction is high, but there is a problem that it requires considerable effort and manpower to transport it to near the basement plate.

Therefore, the present invention is to core the base plate, but when constructing the reinforcement in the lower ground, so that it is possible to install the reinforcement through a perforation rather than press-fitted, and to enable the reinforcement and the basic reinforcement of the structure using the reinforcement The technical problem is to provide a method for strengthening the foundation and repairing structures that are effective for reinforcing the head of reinforcement.

In addition, when using a steel rod-shaped reinforcement such as micro piles or concrete piles (PHC piles) in the reinforcement, it is possible to strengthen the integrity of the base plate (head reinforcement) to enable stable structural foundation reinforcement. It is another technical problem.

The present invention to achieve the above technical problem

First, it drills the bottom of concrete base such as basement floor directly using a perforator and inserts the reinforcement such as steel pipe pile directly into the drilling hole instead of press-fitting. To avoid the difficulties.

Secondly, it is possible to use a conventional steel rod-shaped micro pile as a reinforcement, and furthermore, by connecting the micro pile to a fixing plate so that it can be more stably integrated (base reinforcement of the reinforcing head) on a foundation such as an underground floor plate. When using the micro file, it is possible to provide a reliable means for ensuring the integrity with the foundation.

In addition, even if a concrete pile is used, the head can be easily integrated (head reinforcement) on the same foundation as the base plate.

Third, the present invention does not require a reaction force body for indentation because it does not press-fit the reinforcement body to replace the reaction force for a load-bearing confirmation or impression of a simple structure to improve the efficiency in its installation and dismantling.

Fourth, the present invention is further equipped with a horizontal acupressure plate on the lower end of the anchor bar to prevent acupressure destruction on the contact surface when the conventional A-shaped acupressure plate is spread over the same base as the base plate.

According to the present invention, not only the construction space and workability of the reinforcement such as the pile in the new construction structure, but also the limited space such as the base such as the base plate can be made easier, and the overall construction air can be shortened. Basic reinforcement or repair is possible.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

BRIEF DESCRIPTION OF DRAWINGS To describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings, and embodiments according to the present invention may be modified in various other forms, and thus the scope of the present invention. Is not limited to the embodiment described below.

The present invention relates to a method for reinforcing or repairing a foundation, which is described based on the basement floor plate.

First, in the case of an existing structure, the base plate 100 is cored.

For example, as shown in FIG. 2, four cored holes 120 are formed around the pillars 110 of the basement floor plate 100 using an excavator or the like.

The core ring hole 120 is formed to have a larger diameter at the upper end and a smaller diameter at the lower end as described below so that the fixing plate may be positioned inside the core ring hole 120.

Next, the drilling hole 210 is formed in the ground 200 through the core ring hole 120, but the lower end of the drilling hole 210 may be formed to the support layer 220 under the ground 200.

In the case of the newly constructed structure, the core ring hole 120 may be formed after the construction of the basement floor plate 100. First, the drilling hole 210 may be formed, and then the basement floor plate 100 may be constructed. Blocking may be performed so that the core ring hole 120 communicating with 210 may be formed.

Next, as shown in FIGS. 3 and 7, the lower end of the reaction force 300 including the anchor rod 310 and the pressure plate 320 according to the present invention is surrounded by the core hole 120 of the base plate 100. It is fixed to the bottom and installed so as to protrude above the core ring hole (120).

At this time, first, only the anchor rod 310 is installed first, and the anchor rod 310 is connected to the connection nut 63 to the extent that it can be extended upwards as long as the anchor rods 61 and 62 according to FIG. 1C. Rather, by using a shorter extension length to improve the efficiency of transportation and construction.

At this time, the bottom of the anchor rod 310 is equipped with the A-shaped acupressure plate 330, and the horizontal acupressure plate 340 is further attached to the upper surface of the A-shaped acupressure plate 330, the horizontal acupressure The pulling force transmitted from the anchor rod 310 by the plate 340 may have the effect of being dispersed, thereby preventing the acupressure destruction of the basement floor plate 100 by the A-shaped acupressure plate 330.

As a result, the anchor bar 310 is extended downward through the core ring hole 120 formed in the base plate 100 and horizontal acupressure mounted on the bottom of the anchor bar on the bottom surface of the base plate 100 lower lower core ring hole 120 Plate 340 is caught, it can be seen that the lower end of the reaction force 300 is fixed to the core ring hole (120).

At this time, since the a-shaped acupressure plate 330 and the horizontal acupressure plate 340 are lodged in the ground of the bottom of the basement floor plate 100, the position can be fixedly set.

In addition, the upper end of the anchor rod 310 is disposed so as to protrude slightly upward from the exposed upper surface of the basement floor plate 100.

Next, the reinforcing body 400 such as a steel pipe pile is inserted into the core ring hole 120 as it is.

Of course, such a reinforcement 400 is to be inserted into the drilling hole 210 while connecting the segmented by the work space, such as the base plate.

In the present invention, because the ground of the base plate 100, the lower ground perforated separately can be omitted for the work for the reinforcement (400) indentation, the factory for the drilling hole 210 can be used for limited space It is preferable to use a device in which a perforation hole can be formed in the ground such as a rock.

Next, as shown in FIG. 4, the pressure plate 320 is mounted on the upper end of the anchor rod 310 protruding upward using the nut 350, and then the bottom surface of the pressure plate 320 and the reinforcement member 400. The hydraulic jack 500 is installed on the upper surface.

When the hydraulic jack 500 is operated as shown in FIG. 5, the hydraulic cylinder extends upwardly and contacts the pressure plate 320 while a vertical downward compression force is transmitted to the reinforcement 400 by reaction force. By measuring the strength of the reinforcement 400 to determine the basic reinforcement effect of the reinforcement 400.

When confirming the basic reinforcement effect, by using a hydraulic jack with a larger capacity, such as the compression force introduced into the reinforcement and the reaction force generating reaction force against the compression force to enable the foundation reinforcement or repair through the impression of the foundation, the structure. do.

After confirming the basic reinforcement effect or basic repair (foundation, structure impression), the anchor bar 310 is welded to the reinforcement 400, which is a steel pipe pile, using a connecting plate (B), etc. It is to act as a base on the basement floor plate (100).

Next, as shown in Figure 6 dismantle the pressure plate 320 and the hydraulic jack 500 fastened to the top of the anchor rod 310, in the case of a steel pipe pile as a reinforcement 400 concrete or mortar (or cement paste) therein Filler 410, including that contained in gravel) is to be filled so that the basic reinforcement effect of the steel pipe pile can be promoted.

Accordingly, the upper end portion of the core ring hole 120 is widened to protrude the upper end of the anchor rod 310, and in the case of the steel pipe pile, the reinforcement member 400 filled with the filler is exposed.

Next, as shown in FIG. 7, the fixing plate 600 is installed on the top of the core ring hole 120, and the fixing plate 600 is installed on the core ring hole 120. In this case, the top surface of the reinforcement 400 contacts the bottom surface of the fixing plate ( To set the position of 600).

At this time, the fixing plate 600 is formed with a bolt hole 610 to be penetrated by the anchor rod 310, the upper end of the penetrated anchor rod to be fixed to the fixing plate 600 by the fastening nut 620. Done.

Next, the filling of the finishing material (B), such as mortar into the interior of the core ring hole 120 so that the final core ring hole 120 can be closed.

8 and 9 illustrate an example in which a micro pile is used as the reinforcement 400.

Also to form a core ring hole 120 in the base plate 100, and to form a drilling hole 210 in the lower ground 200, the lower end of the drilling hole 210 is a support layer (under the ground 200) ( It is desirable to form up to 220).

Also, by fixing the lower end of the reaction force 300 including the anchor rod 310 and the pressure plate 320 of the present invention to the bottom surface around the core ring hole 120 of the base plate 100, the core ring hole 120 Install to protrude upward.

Of course, as shown in Figure 7, the lower portion of the A-shaped acupressure plate 330 is mounted, and using the anchor bar 310 further attached to the horizontal acupressure plate 340 on the upper surface of the A-shaped acupressure plate 330.

Next, the casing 700 is further installed over the core ring hole 120 and the drilling hole 210, and the reinforcement body 400, which is a micro pile, is installed.

The casing 700 serves to further reinforce the upper part of the drilling hole 210, and the diameter of the reinforcement member 400, which is a micro pile, is considerably smaller than the diameter of the drilling hole 210 so as to prevent the collapse of the drilling hole. To do this.

Accordingly, the filler 710 including concrete or mortar is filled into the drilling hole 210 in a state in which the micro pile reinforcement 400 is set to be disposed at the center of the drilling hole.

It can be seen that the filler 710 is also filled in the drilling hole 210.

Next, as shown in FIG. 9, the fixing plate 600 is mounted on the core ring hole 120 at the top of the core ring hole 120.

At this time, the fixing plate 600 is also formed with a bolt hole 610 as shown in Figure 6 so that the upper end of the anchor rod 310 can pass through.

In addition, the central portion is formed so that the reinforcement member 400, which is a micropile, can be penetrated, and the head of the reinforcement member 400, which is a micropile protruding above the hole, is exposed.

Next, the cap 630 is installed so as to surround the head, but the lower end is supported on the fixing plate 600.

Next, the hydraulic jack 500 is installed and operated between the upper surface of the cap 630 and the bottom surface of the pressure plate 320 to check the basic reinforcement effect or basic repair effect of the micro pile by the reaction force.

At this time, it is necessary to adjust the time so that the basic reinforcing effect can be confirmed within the time that the filler 710 is not cured.

When the final basic reinforcement or repair effect is confirmed, the fixing head 600 is fixed to the fixing plate 600 using the fastening nut 620 to the fixing plate 600.

Next, the upper end of the penetrated anchor bar is fixed to the fixing plate 600 by the fastening nut 620.

As a result, in the case of the reinforcement member 400 which is a micro pile, it can be seen that the head can be integrated with each other by the anchoring plate 600 and the anchor rod 310 in the basement floor plate. Technical features of the present invention that can solve a significant portion of the head reinforcement can be expressed.

Next, further filling the finishing material (B), such as mortar into the interior of the core ring hole 120 so that the final core ring hole 120 can be closed.

10 and 11 illustrate an example in which a concrete pile (PHC pile) is used as the reinforcement 400.

Also forming a core ring hole 120 in the base plate 100, and to form a drilling hole 210 in the lower ground 200, the lower end of the drilling hole 210 is a support layer 220 below the ground 200 To form).

Also, by fixing the lower end of the reaction force 300 including the anchor rod 310 and the pressure plate 320 of the present invention to the bottom surface around the core ring hole 120 of the base plate 100, the core ring hole 120 Install to protrude upward.

Also, as shown in FIG. 7, the lower end of the A-shaped acupressure plate 330 is mounted, and the anchor bar 310 further includes a horizontal acupressure plate 340 attached to the upper surface of the A-shaped acupressure plate 330.

Next, the reinforcement member 400 which is a concrete pile is inserted into and installed in the drilling hole 210.

At this time, the inner reinforcing bar 410 is protruded upwards on the upper surface of the concrete pile, so as to extend only to the top just inside the core ring hole 120.

Next, as shown in FIG. 11, the fixing plate 600 is mounted on the core ring hole 120 at the top of the core ring hole 120.

At this time, the fixing plate 600 is also formed with a bolt hole 610 as shown in Figure 6 so that the upper end of the anchor rod 310 can pass through.

Next, while enclosing the internal reinforcement of the concrete pile, the cap 630 is installed so that the lower end is supported on the upper surface of the fixing plate 600.

Next, by installing and operating the hydraulic jack 500 between the upper surface of the cap 630 and the bottom of the pressure plate 320, to confirm the basic reinforcement or basic maintenance effect of the micro pile by the reaction force.

Next, the upper end of the penetrated anchor bar is fixed to the fixing plate 600 by the fastening nut 620 and the inner reinforcing bar 410 is also fixed to the fixing plate 600 by the fastening nut 420.

As a result, it can be seen that the head of the concrete pile can sufficiently secure the integrity (reinforcement of the head) with the base plate.

Next, further filling the finishing material (B), such as mortar into the interior of the core ring hole 120 so that the final core ring hole 120 can be closed.

1a to 1e is a block diagram showing the configuration and operation principle of the present invention.

2 to 6 show the basic reinforcement work according to the present invention in a schematic order.

Figure 7 shows the reaction mechanism of the present invention.

8 to 9 illustrate the basic reinforcement work using the reinforcement of the micro pile of the present invention in a schematic order.

10 and 11 illustrate the basic reinforcement work using the reinforcement of the concrete pile of the present invention in a schematic order.

<Description of the symbols for the main parts of the drawings>

100: base (basement floor plate) 120: core ring hole

200: ground 210: drilling hole

300: reaction hole 310: anchor rod

320: pressure plate 400: reinforcement

420: tightening nut 500: hydraulic jack

600: fixing plate 700: casing

Claims (7)

In the method of reinforcing or repairing the foundation such as basement floor plate, Forming perforation holes 210 directly in the ground 200 of the foundation reinforcement or repair site; The reinforcement member 400 including concrete or steel pile is inserted into the drilling hole 210 and the lower end of the reaction hole 300 including an anchor rod and a pressure plate is fixed to the drilling hole upward. Installing to protrude; Installing a hydraulic jack 500 between the upper end of the reinforcement and the bottom of the pressure plate to raise the strength or the foundation by the reinforcement; and After removing the pressing plate and integrating the anchor rod and the reinforcement body, the upper end of the anchor rod has a diameter larger than that of the drilling hole and is fastened by using a bolt and a nut to the fixing plate 600 disposed below the upper hole of the drilling hole. Closing and closing the hole; Including, but the bottom of the anchor rod mounted A-shaped acupressure plate 330, using a horizontal acupressure plate 340 is further attached to the top surface of the A-shaped acupressure plate Or repair. delete The method of claim 1, wherein the drilling hole is formed on the basement floor plate of the existing structure or the basement floor plate of the new structure. According to claim 3, The reaction sphere is anchor rod extends downward through the drilling hole formed in the base plate and the horizontal acupressure plate is mounted on the bottom of the anchor bar on the bottom of the base plate of the lower hole, the lower end of the reaction force is Method of reinforcing or repairing the foundation of the structure to be fixed to the drilling hole. According to claim 1 or claim 4, wherein the reinforcement is to be used any one of the steel pipe pile, rod-shaped steel bar pile or concrete pile, in the case of the steel pipe pile to integrate the anchor rod and the reinforcement by welding After the filling step including the filling material including concrete or mortar is further included therein, the fastening nut to the fixing plate to the top of the anchor rod in the state that the upper surface of the steel pipe pile is located on the bottom of the fixing plate 600 Method of reinforcing or repairing the foundation of the structure, which is tightened by using a screw and then closes the hole. According to claim 5, If the reinforcement is a steel pile pile micro pile, inserting the casing 700 having a smaller diameter than the drilling hole, so that the filler containing concrete or mortar is filled in the drilling hole and the casing To further include the step, the top of the micro pile is penetrated to the fixing plate by using a fastening nut through the fixing plate to integrate the reinforcement micro pile and the anchor body, the upper end of the anchor rod using a nut to the fixing plate Method of reinforcing or repairing the foundation of the structure to close the drilled hole after tightening. The method according to claim 5, wherein when the reinforcement is a concrete pile, the upper end of the exposed internal reinforcing bar 410 of the concrete pile passes through the fixing plate and is fastened to the fixing plate by a fastening nut, and the upper end of the anchor species is fixed to the fixing plate. Method for reinforcing or repairing the foundation of a structure, which is tightened using a nut and then closes the hole.

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