KR100879621B1 - Basement reinforcing and structure restoration method using piling appratus - Google Patents

Abstract

A method for reinforcing a bottom plate and restoring a structure by pile construction is provided to fix a lower anchor more strongly by forming a hole on a bottom plate of a structure, and to prevent the punching failure caused by partial stress concentration on a bottom plate. A method for reinforcing a bottom plate and restoring a structure with pile construction comprises the steps of forming a coring hole to form many outer through holes on the outer circumferential surface of a central through hole, inserting an expansion plate(210) to hang on the base of the bottom plate, inserting an inner tube to the central through hole and filling up a space between the outer circumferential surface of the inner tube and the coring hole with mortar, inserting an anchor plate(300) to a lower anchor(200) and moving downward to make the anchor plate inserted to the coring hole, inserting and installing a pile to the lower ground through the central through hole of the anchor plate, and making the inserted pile fixed to the anchor plate and fastening the top of the lower anchor to the anchor plate.

Description

Reinforcement of floor plate and restoration of structure through pile construction {BASEMENT REINFORCING AND STRUCTURE RESTORATION METHOD USING PILING APPRATUS}

The present invention relates to a method of reinforcing the bottom plate and the structure restoration through pile construction. More specifically, the present invention relates to a method of restoring the structure by raising the structure and thereby constructing the foundation pile in the bottom plate by inserting the pile into the bottom plate of the building or inserting it into the ground drilling hole.

In general, relatively large structures, such as apartments and office buildings, have a large self-weight so that pile foundations are mainly supported on the ground to support them.

Ground reinforcement method based on the conventional pile foundation is shown in Figure 1a, looking at this,

First, the ground (10) to be installed structure is to break (A).

Next, reinforce the ground by constructing the foundation pile 20 on the top surface of the dig, and laying the foundation concrete so as to be integral with the head of the foundation pile 20, and completed the foundation structure 30 by the foundation concrete The upper structure 40 is to be constructed on top.

However, the conventional method of constructing the upper structure after the construction of the conventional basic structure is not only consumes a lot of air by the foundation pile construction, etc., but also uses a large-scale equipment, which inevitably involves risks and increases construction costs. I had.

Structural impression and basic reinforcement method (Patent Registration No. 10-0621669) using an indentation that can be used to replace the conventional ground reinforcement method has been recently developed.

It is possible to press-fit (push-in) the pile with small pieces of equipment even if the field work conditions are very bad or if the construction of the structure that is buried in the ground using the equipment is difficult. It is a method that can be restored quickly, and can combine pile press construction method and basic reinforcement that can raise and handle only the minimum necessary parts without completely dismantling or dismantling the structure requiring repair or reinforcement.

Specifically, as shown in FIG. 1B, in order to first install the reaction force support 50, the reaction force hole 31 is drilled in the basic structure 30, and then anchors such as reinforcing bars or steel bars in the reaction force 31 are formed. 52) penetrate the lower end (51, reaction plate) to be fixed to the bottom of the base structure base plate,

The upper end of the anchor 52 is installed by using the connecting nut 54, the upper support 53 in the form of a circular plate, artificially install the reaction force support 50 to the foundation structure 30,

In the lower part of the upper support body 52, the indenter 60, which is a pile like a steel pipe, is set in the indentation hole 32 drilled to a predetermined depth, such as the reaction force 31, between the indenter 60 and the upper supporter. By operating the press-fitting means 70 including the hydraulic cylinder to press-fit the press-fitting body 60 to the lower ground of the foundation structure 30, the lifting means including a hydraulic cylinder between the press-fitting press-up 60 and the upper structure plate Finally, it can be seen that it is possible to raise the submerged structure by the pulling means, and to reinforce the foundation structure by installing the pile indentation on the foundation structure.

In addition, it can be seen that the indenter 60 press-fitted into the ground can be integrated with the foundation structure 30 and the finished reaction force support 50 to act as a foundation pile for supporting the foundation structure.

However, when the bottom (51, reaction plate) of the anchor 52 is used in the form of an L-shape, when the pile is press-fitted construction, there is a phenomenon that the foundation structure is locally damaged by the excessive pull force when the pile press-in construction Problems in structural safety may arise, and the need for open-ended development is possible, which enables the construction of piles of more secure and reinforced structures.

Therefore, the present invention is to form a hole in the bottom plate of the structure to ensure that the lower anchor used when constructing the pile more securely, so that the punching fracture phenomenon due to local stress concentration on the bottom plate does not occur The technical problem is to provide a method of reinforcing the bottom plate and restoring the structure through the pile construction that enables the bottom plate reinforcement and the structure impression through construction.

In order to achieve the above object, the present invention is configured as follows.

First, the anchor is securely supported on the bottom of the bottom plate so that the pile is more securely inserted into the bottom plate of the bottom plate or inserted into the perforation hole, so that the pressure area at the bottom of the bottom anchor is increased so that excessive stress is not concentrated on the bottom plate. The expansion plate was allowed to form.

Such an extension plate may be formed so that approximately 1/4 of the area of the central through hole is formed to maximize the pressure applied to the bottom of the bottom plate during the construction of the pile.

Second, the safety of the construction is not threatened by the damage of the lower anchor during pile construction so that the lower anchor can be secured to the bottom plate.

Third, when the pile is installed on the bottom plate of the bottom plate, the fixing plate is fitted into the central through hole and the outer through hole so as to serve as a position setting position of the initial press-in, and the pile is guided by the central through hole of the fixing plate. It can be constructed.

According to the present invention, the foundation pile can be constructed on the structure bottom plate by a safer pile construction, and thus the safe restoration of the structure 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.

2a to 2f schematically show a construction for constructing piles in the bottom plate bottom ground according to the present invention.

First, according to Figure 2a to form a cored hole 100 in the bottom plate (A) constituting the lower portion of the structure.

The core ring hole 100 is formed by using a perforator in the bottom plate (A) formed of concrete, and the bottom plate (A) surface for the convenience of the initial position setting and construction of the through holes (110, 120) to be described later Through chipping, chipping holes 130 having a predetermined diameter are formed.

Accordingly, the chipping hole 130 may be formed as a circular groove having a little depth from the bottom plate surface, and formed with a diameter larger than the combined diameter of the central through hole 110 and the outer through hole 120 to be described later. Be sure to

Accordingly, the central through hole 110 is first formed from the upper surface of the center of the chipping hole 130, and a plurality of outer through holes 120 are formed on the outer circumferential surface thereof.

At this time, the core ring hole 100 will determine the number of installation of the enemy according to the reinforcement of the bottom plate and the restoration by the structure impression.

The central through hole 110 and the outer through hole 120 is to pass through the bottom plate (A),

The central through-hole 110 is formed to have a predetermined diameter so that the file to be described later can be pressed or inserted to serve as a guide hole that the file is pressed or inserted later.

The outer through hole 120 is a reverse hole of the guide hole to be extended to the upper side is inserted into the lower anchor formed at the bottom of the expansion plate to be described later, to have a smaller diameter than the central through hole 110 and to form a plurality of In the case of Figure 2a it can be seen that four are formed on the outer peripheral surface of the central through-hole.

Next, the lower anchor 200 is prepared as shown in FIGS. 3A and 3B, and the expansion plate 210 is formed at the lower end of the lower anchor 200.

The lower anchor 200 is in the form of a steel bar, so that the upper and lower portions of the lower thread 200 is formed so that the nut is fastened to use that is formed, which is also referred to as a lower bolt.

The length of the lower anchor 200 is to have a length that extends slightly above the core ring hole from the bottom of the bottom plate (A), but is set to penetrate the outer through-hole 120 described above.

The expansion plate 210 is formed at the bottom of the lower anchor 200 as a plate-like plate, such as a thick steel plate, a bolt in the central portion of the expansion plate 210 so as to be fastened to the female thread formed on the lower end of the lower anchor The ball is formed so that the lower anchor is fastened to the expansion plate through the bolt hole to be provided as a prefabricated.

One extension plate 210 is fixed to the lower end of one lower anchor 200, and the extension plate is set to be hooked to the bottom plate bottom through the central through hole 110 and the outer through hole 120.

At this time, the expansion plate 210 should be manufactured to have a ground area for widening the ground area with the bottom of the bottom plate through the outer through hole, which is preferably adjusted to penetrate the outer through hole.

In the case of FIG. 2A, four lower anchors 200 having four expansion plates 210 are set to have a diameter larger than that of the central through-hole 110 so as to be supported on the bottom of the bottom plate.

For example, the expansion plate should be formed at approximately 1/4 of the area of the central through-hole, so that the pressure applied to the bottom of the bottom plate during dispersion of the pile can be dispersed as much as possible, while ensuring workability.

When the lower anchor 200 is to be drawn upward, the expansion plate 210 is supported by the bottom plate bottom surface of the outer through the central through hole and the outer through hole,

At this time, the resistance to the pulling force is dispersed by the expansion plate 210 having a larger ground area is transmitted to the bottom plate bottom phenomenon that the bottom plate around the central through-hole 110 by the reaction plate 510 as shown in Figure 1b is destroyed Can be prevented.

In addition, it is preferable that the lower anchor 200 and the expansion plate 210 can be sufficiently secured to each other by the additional fixing angle 600 to each other.

As such, when four lower anchors 200 having four extension plates 210 are set, they must be securely fixed.

This is because, if the position of the lower anchor 200 is not fixedly set, it may not serve properly as a support for indentation of the pile delivered through the same, which may cause problems such as destruction of the bottom plate during construction.

In fact, such a problem such as the destruction of the bottom plate is a technical problem that must be solved because it threatens worker safety in addition to delaying construction.

2b, first, the inner tube 230 is inserted into the inner circumferential surface of the central through hole 110 to the extent that the inner tube 230 can be fixed and inserted into the space between the outer circumferential surface of the inner tube 230 and the core ring hole 110. The filler 240 including the mortar is filled.

The lower anchor 200 in which the expansion plate 210 is formed by the filler 240 can be securely fixed at the set position.

However, when the expansion plate 210 having a relatively large size by area is fixed around the bottom surface of the bottom plate, the fixing of the lower anchor 200 itself extending upward from the core ring hole 100 may be somewhat neglected.

In other words, the stress may be concentrated in one lower anchor depending on the verticality of the lower anchor itself and the separation distance from each other.

Accordingly, in the present invention, as shown in FIG. 2B, the central hole 310 is formed in a plate shape, and the fixing plate 300 having the side hole 320 formed around the central hole is inserted into the lower anchor 200 at an upper end thereof. The fixing plate 300 is inserted into and fixed to the core ring hole 100 by moving downward while putting.

At this time, the central hole 310 serves as a hole in which the file to be described below is pressed or inserted, the diameter of the central hole 110 and the central through hole 110 constituting the core ring hole The diameter will be determined in consideration of the inserted inner tube 230,

The side hole 320 is a through hole corresponding to the position of the lower anchor 200 around the central hole 310 so that the upper end of the lower anchor 200 passes through the side hole 320.

The fixing plate 200 is inserted into the lower anchor 200 to be lowered downward. The size of the fixing plate 200 is such that the size of the fixing plate 200 is fitted into the central through hole 110, but the core ring hole ( The central through hole 110 of the 100 and the central hole 310 of the fixing plate 300 are set to communicate with each other.

In this case, the core ring hole 100 is fixedly set by the anchor plate 300 in the state where the lower anchor 200 is firmly set, and the verticality of the lower anchors and the separation distance from each other are constrained to smoothly transfer the load by the lower anchor. It can be seen that the diffusion is distributed on the bottom plate and the diffusion distribution can be prevented from being pulled to one side, thereby making it a very safe structure.

Next, as shown in Figure 2c, through the central through hole 310 of the fixing plate 300 is inserted into the construction of the bottom plate (B) bottom plate (B).

In this case, two methods may be selected to insert the file.

First, the pile is press-fitted using the reaction force support 500, for example. This press-fit method is a method in which the front end portion of the pile is pressed into the bottom plate of the bottom plate by applying a reaction force to the upper portion of the pile,

First, the reaction force support 500 is installed on the upper end of the fixed anchor lower anchor 200

The reaction force support 500 is provided with a lower anchor 200 and a reaction force plate 510 thereon as shown in FIG. 1B, and the pile 400 set at an initial position with the reaction force plate 510 of the reaction force support 500. ) By the hydraulic jack 520 installed on the upper surface is to be pressed into the bottom of the bottom plate.

Of course, if the length of the lower anchor 200 needs to be adjusted, the connecting anchor may be connected to the lower anchor on the reaction force plate 520 using the sleeve nut.

Next, although not shown, with the installation of the fixing plate to the bottom of the bottom plate or after the installation of the fixing plate, to form a ground drilling hole using a small drilling machine, etc. in the core ring hole 100, the pile 400 in such ground drilling holes This is a simple method of inserting.

In this case, the pile 400 may be press-fitted into the lower part of the ground, or the top end of the final pile 400 may be slightly exposed to the core hole by allowing the tip of the final pile 400 to be inserted by the ground drilling hole. But if necessary, the upper end of the file 400 will be cut.

The file 400 is basically a variety of files, such as steel pipe file, concrete file may be used, but in the present invention will be described based on the steel pipe file.

When the pile 400 is inserted into the lower ground of the bottom plate A, it is preferable to construct the lower end of the pile 400 to reach the hard support layer of the ground.

The completed pile 400 has two functions.

The first is to act as the foundation pile of the bottom plate (A). Structural floor plate (A) may be constructed without foundation piles at first, or foundation piles may exist, but floor plates need to be repaired and reinforced over time, especially in remodeled apartments to secure underground parking spaces. The foundation pile reinforcement construction is inevitably required.

Thus, the pile 400 can act as a foundation pile for the bottom plate reinforcement.

Second, it acts as a restoration by lifting the structure. The structure may have an uneven settlement due to various factors, and this uneven settlement will greatly affect the defect of the structure.

Therefore, when the pile 400 reaches the lower ground hard support layer, and additionally operates the pulling means, it is possible to restore the unequal settlement of the structure before the settlement through the pile 400 support.

When the construction of the pile 400 is completed, it is then fixed to the core ring hole 100 to be integrated with the bottom plate (A).

To this end, the upper surface of the pile 400 is to be head-cut so that the upper surface of the pile 400 can be located in the core ring hole 100, as shown in Figure 2d,

This prevents the pile 400 from protruding upward from the bottom plate.

For example, the fixing angle 600 is welded to the outer circumferential surface of the head cut pile 400 and the fixing plate 300 to secure a fixed state.

Furthermore, after removing the reaction force support 500 for the construction of the pile 400 and the equipment for the insertion construction, the lower anchor 200 also uses the fasteners 700 such as washers and nuts as shown in FIG. 200 is also to be fixed to the fixing plate 300.

This fastener 700 is eventually the tension in the vertical direction to press the fixing plate 300 to the core ring hole 100 is acting, it can be seen that the more secure setting of the lower anchor.

Since the fixing plate 300 is basically inserted into the core ring hole 100 and its movement is limited, there is no problem even if the lower anchor 200 and the pile 400 are fixed to the fixing plate 300.

Next, the surface of the bottom plate is finished as a surface finish material 800 such as mortar in the core ring hole 100.

2A to 2D illustrate one pile construction, but a plurality of piles are installed according to the size of the bottom plate, the purpose of reinforcing or restoring the structure, and the position thereof may be determined as a necessary position.

Figure 1a and 1b shows the bottom plate repair, reinforcement of the structure by the conventional pile construction.

Figures 2a, 2b, 2c and 2d shows the work of the bottom plate reinforcement and structure restoration method according to the present invention.

Figure 3 shows an assembled perspective view of the lower anchor and the expansion plate according to the present invention.

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

100: core ring hole 110: central through hole

120: outer through hole 200: lower anchor

210: extension plate 300: fixing plate

400: pile 500: reaction support

600: fixing angle 700: fastener

800: surface finish

Claims (4)

Forming a core ring hole such that a plurality of outer through holes are formed on an outer circumferential surface of the central through hole formed in the bottom plate; Inserting an extension plate formed at a lower end of a lower anchor set to extend upwardly to a core ring hole to widen the ground area with the bottom plate bottom through the outer through hole so that the extension plate is hung on the bottom plate bottom; Inserting an inner tube into the central through hole so that the lower anchor formed with the extension plate is fixed, and then filling a filler including mortar in the space between the outer circumferential surface of the inner tube and the core ring hole; A central hole is formed in a plate shape, and the fixing plate having a side hole formed around the central hole is moved downward while being inserted into an upper end of the lower anchor so that the fixing plate is inserted into a core ring hole; Inserting the pile into the bottom plate of the bottom plate through the central through hole of the fixing plate; And And fixing the inserted file to the fixing plate and fastening and fixing the upper end of the lower anchor to the fixing plate by using bolts and nuts. The method of claim 1, wherein the step of inserting the pile into the bottom plate of the bottom plate through the central through hole of the fixing plate The upper plate is fastened to the upper end of the lower anchor, and the hydraulic jack is operated between the upper plate and the pile so that the pile is press-fitted into the lower ground by reaction force, and the pile pile is formed to form a base pile on the bottom plate. Reinforcement of the bottom plate through the pile construction and the structure restoration method to raise the structure including the bottom plate. The method of claim 1, wherein the step of inserting the pile into the bottom plate through the central through hole of the fixing plate Directly insert the pile into the ground drilling hole formed by directly drilling the bottom of the bottom plate so that the pile can be inserted to form a foundation pile on the bottom plate by inserting the pile and to raise the structure including the bottom plate Reinforcement of floor plates and restoration of structures through pile construction. The pile construction according to claim 1 or 2, wherein a fixing angle is further installed on the bottom surface of the extension plate so that the lower anchor and the expansion plate are integrated with each other, and the fixing angle is further installed so that the constructed pile and the fixing plate are integrated with each other. Reinforcement of floor plates and restoration of structures.

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