KR100807810B1 - Structure lifting method by foundation strengthening - Google Patents

Abstract

A structure lifting method by foundation strengthening is provided to lift a structure by employing a reaction force support body, a forcedly inserted body, and a pressing unit after forming a reinforcing foundation. A structure lifting method by foundation strengthening includes the steps of: digging the ground around a foundation of a structure(110); installing anchor bars(121) including reinforcing bars to the lateral sides of the foundation; forming a reinforcing foundation(120) by installing hollow pipes normal to the foundation, assembling the reinforcing bar to the anchor bar, assembling a lower reaction force unit(211) including a reinforcing bar around the hollow pipe, and pouring concrete to expose the top of the lower reaction force unit; installing a reaction force support body by connecting the lower end portion of an upper reaction force unit(212) to the upper end portion of the lower reaction force unit, and fixing the upper end portion of the upper reaction force unit to an upper support body; setting a forcedly inserted body(300) in an insertion hole formed by removing the hollow pipe, installing a pressing unit between the upper part of the forcedly inserted body and the upper support body to press the forcedly inserted body to the bottom of the structure; and lifting the structure by installing a lifting unit at the top of the forcedly inserted body.

Description

Structural impression method by foundation reinforcement {STRUCTURE LIFTING METHOD BY FOUNDATION STRENGTHENING}

The present invention relates to a structure lifting method by the foundation reinforcement. More specifically, the present invention relates to a structure raising method by reinforcing a foundation which can raise a settled structure by reinforcing a foundation of a structure to form an expanded reinforcement base and installing a reaction force support, a press-fitting body, a press-fitting means, and a pulling means.

In case of reinforcement of the foundation due to settlement of the constructed structure, the method of injecting cement liquid or mortar into the ground has been mainly used.However, this method is difficult to secure construction quality and suppresses further settlement. There was a problem that it is not effective because it is only effective.

Accordingly, the applicant of the present invention is able to raise the sinking structure while confirming the bearing capacity of the structure and can obtain the effect of installing a permanent foundation pile, and thus invented a more efficient raising method of the sinking structure, FIGS. 1A and FIG. 1b shows a method of lifting and basic reinforcing structures using Korean-patented indenters (Korean Patent No. 621,669).

According to the conventional impression construction method, the pile can be press-fitted when the field work condition is very bad or when the foundation work is difficult by large-scale equipment. The pile press construction method and basic reinforcement method that can restore the function of, and can raise only the minimum necessary parts without completely dismantling or dismantling the structure requiring repair or reinforcement.

First, in order to install the reaction force support 20, the reaction force hole 12 is drilled in the bottom plate, which is the base 2 of the structure 1, and then the reaction force hole 21, such as reinforcing bars or steel bars, is installed in the reaction force hole 12. The lower end is inserted into the bottom of the bottom plate of the structure (1), and the upper support body 22 in the form of a circular plate is installed on the upper side of the reaction force tool 21, so that the reaction force supports 20; 21 and 22 are artificially formed. ),

In the lower part of the upper support 22, a press-fit body 30, such as a steel pipe, is set in the press-in hole 13 drilled to a predetermined depth, such as the reaction force hole 12, and the press-fit member 30 and the upper support body ( 22, the press means 40 including the hydraulic cylinder is operated to press the press body 30 to the lower portion of the structure (1), and then the lifting means 50 including the hydraulic cylinder above the press-fit press body 30 Finally, it becomes possible to raise the structure (1) settled by the pulling means (50).

In addition, the indented body 300 pressed into the bottom of the raised structure 1 is integrated with the structure 1 and the finished reaction force 21 to act as a foundation pile for supporting the structure 1.

A method of lifting a structure using such a conventional pulling method is illustrated in FIGS. 2A and 2B.

That is, Figure 2a is installed on the inner bottom plate 3 of the structure (1) by installing the structure lifting system 10 in the conventional impression method including a reaction force support, press-fit, pulling means and press-in means, Figure 2b shows that it can be pulled, Figure 2b is a structure lifting in the conventional lifting method comprising a reaction force support, indentation body, the pulling means and the pressing means in the enlarged base plate 4 of the structure (1) on which the enlarged base is formed The system 10 can be installed to raise the structure.

However, the conventional impression method is applicable to the foundation having sufficient strength, but the internal work of the structure 1 is impossible, and even if the enlarged foundation is not formed or the expanded foundation is formed in the ground, In the case where a sufficient trench is impossible, there is a problem that conventional impression techniques cannot be applied.

The present invention is to solve the above problems,

It is an object of the present invention is not possible to work inside the structure, and the expansion foundation is not formed in the structure, when the conventional structure impression method using the press-fitted body is not available from the outside of the structure to press the pile and settled the structure It is to provide a structure raising method by reinforcing the foundation to restore the function of the structure by raising.

Another object of the present invention is to provide a structure raising method by the basic reinforcement that can be applied even when the foundation is formed deep in the structure can not use the conventional structure impression method using the indentation body.

The present invention to achieve the above technical problem,

First, dig around the foundation of the structure, install the anchor bar including the reinforcing bar on the side of the structure foundation, install the hollow pipe in the vertical direction on the structure foundation side, and assemble the foundation reinforcement to be assembled with the anchor bar, hollow After assembling the lower reaction sphere including the reinforcing bar around the pipe and placing the concrete so that the upper end of the lower reaction sphere is exposed to form an expanded reinforcement foundation,

After connecting the lower end of the upper reaction sphere to the upper end of the lower reaction sphere, fixed the upper end of the upper reaction sphere to the upper support to install the reaction support, and set the press-fit body in the press-in hole formed by removing the hollow pipe, The press-fitting means was installed and operated between the upper end and the upper support to press-fit the press-fitting body to the lower part of the structure, and an impression means was installed on the press-fitting press-fitting body to raise the sinked structure.

Second, after digging around the foundation of the structure so that it can be applied when the foundation of the structure is formed in the ground depth, the step of cutting the structure foundation at a predetermined depth further.

According to the present invention, the strength of the inner bottom plate of the structure is not sufficient or the internal space is narrow so that it is impossible to raise the structure in the interior, and the expansion foundation is not formed in the structure, and thus the structure raising method using the conventional press-fitting structure is used. Even if it is not available from the outside, while checking the bearing capacity of the structure, it is possible to press the pile from the outside of the structure to raise the structure is settled.

In addition, according to the present invention, even when an enlarged foundation is formed in the structure, the structure having settled can be raised, and thus a very general structure raising method can be provided.

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. Is not limited to the embodiments described below.

The present invention is not possible to work inside the structure, even if the expansion base is not formed on the structure or even if the expansion foundation is formed on the ground deep enough to break the premise, a separate expansion reinforcement foundation is formed on the foundation of the structure The present invention relates to a method for raising a settled structure by installing a structure raising system, and the processes are sequentially shown in FIGS. 3A to 3F.

3A illustrates a state in which the foundation of the structure is broken.

Typically, the base 110 extends downward from the pillars constituting the structure 100 and is positioned at the corner of the structure 100. In FIG. 3A, the enlarged foundation is not formed in the structure 100, and a typical shallow foundation is provided. It can be seen that 110 is formed.

In order to form an enlarged reinforcement base on the foundation 110 so that the structure raising system of the present invention can be installed, the periphery of the foundation 110 of the structure 100 is first excavated.

At this time, the outer surface and a portion of the bottom surface of the structure 100 is excavated so that the portion is exposed, and the bottom surface of the structure 100 except for the base 110 is not exposed.

In addition, although not shown in Figure 3a, when the foundation is formed to a deep ground, including the enlarged foundation, the foundation 110 is cut at a predetermined depth and the enlarged reinforcement foundation is formed on the foundation of the upper portion of the cut structure of the present invention You can also install an impression system.

That is, when the foundation is formed in the ground depth, if the foundation 110 is cut at a predetermined depth after digging, eventually the same as the foundation 110 shown in Fig. 3a, the foundation 110 is an enlarged basis. It means that the base of the upper part of the site | part which cut | disconnected the base formed in the shallow foundation or ground depth which is not formed in predetermined depth.

Next, as shown in FIG. 3b, the anchor bar 121 is installed on the side surface of the foundation 110 that is exposed through the burrow.

The anchor bar 121 may be a conventional reinforcing bar, and after drilling the side of the base 110, it is formed by inserting the reinforcing bar and fixed with mortar.

Alternatively, the anchor bar 121 may be formed by drilling a side surface of the foundation 110 and then installing a conventional set anchor and welding and connecting reinforcing bars.

The anchor bar 121 serves to integrate the existing foundation 110 and the newly formed expansion reinforcement foundation.

Next, as shown in FIG. 3c, the hollow pipe 122 is installed on the side of the structure 110 and the foundation 110, and the anchor bar 121 and the base reinforcement are assembled and the concrete 123 is expanded to expand. The reinforcement base 120 is formed.

The hollow pipe 122 is to form the indentation hole for the subsequent indentation installation in the expansion reinforcement base 120 to have a slightly larger outer diameter than the outer diameter of the indentation body, and is installed in the vertical direction on the bottom of the cracked ground The upper end is installed to be exposed to the upper portion of the expansion reinforcement base 120, and is fixed to the anchor bar 121 by a wire or the like.

At this time, the hollow pipe 122 is preferably disposed so that the two symmetrical around the existing structure foundation (110).

The hollow pipe 122 is to be removed after the pour concrete 123 is cured, there is no big limitation on the material, it may be easy to use PVC pipe and the like.

In addition, the basic reinforcement of the expansion reinforcement base 120 is assembled, so as to be firmly assembled with the anchor bar 121 and are assembled by wire or by welding.

At this time, the lower reaction hole 211 is installed around the hollow pipe 122 is firmly assembled to the base reinforcement, and the plurality of lower reaction holes 211 are installed to have a predetermined distance around the hollow pipe 122. As reinforcing bars or steel bars, it is installed to protrude upward at a predetermined height from the upper surface of the enlarged reinforcement base 120.

When the assembly of the hollow pipe 122, the base reinforcing bar and the lower reaction sphere 211 is completed, the concrete 123 is poured and cured to form an expanded reinforcement foundation 120 integrated with the existing structure foundation 110 do.

Next, as shown in FIG. 3d, first, the hollow pipe 122 is removed to form the press-in hole 130.

The indentation hole 130 is for setting an initial indentation position of the indentation body such as a steel pipe pile and has the same inner diameter as the outer diameter of the hollow pipe 122.

The upper reaction sphere 212 is connected to the upper end of the exposed lower reaction sphere 211, the reaction unit 210 by installing the connector 213 at the upper end of the lower reaction sphere 211 and the lower reaction sphere 212 Will form.

The upper reaction sphere 212 is made of reinforcing bars or steel rods, like the lower reaction sphere 211, the connector 213 is to use a coupler that is a conventional reinforcing bar connection device.

In this case, when the lower reaction mechanism 211 is installed long enough, it may function as the reaction force 210 by itself without the upper reaction mechanism 212 and the fastener 213.

The upper support 220 made of a circular plate is fastened and fixed to the upper end of the reaction sphere 210, the reaction force support 200 which serves as a reaction force for pressing the indenter into the lower ground of the expansion reinforcement base 120 To form.

In this case, the through hole 221 is formed in the upper support 220 to correspond to the number of installation of the reaction force 210 so that the upper end of the reaction force 210 is fastened and fastened by a fastener 222 such as a fastening nut. do.

Next, as shown in FIGS. 3E and 4, first, the indenter 300, which is a steel pipe, is first set in the indentation hole 130 so that the indenter 300 can be easily indented at the set position when a press force is applied later. To help.

The length of such a steel pipe may be pressed while a plurality of steel pipes are connected to each other in consideration of the depth to be pressed.

Accordingly, in the state where the steel pipe is set in the press-in hole 130, the head reinforcing plate 310 is selectively installed in the head of the upper end of the steel pipe, and the hydraulic pressure having a predetermined capacity between the upper support 220 and the head reinforcing plate 310 The press fitting means 400, such as a cylinder, is installed and operated to press the press body 300 under the enlarged reinforcement base 120.

That is, the reaction force support 200 restrains the operation of the hydraulic cylinder so that the steel pipe is press-fitted into the ground of the press-in hole 130 in the form of the reaction force.

The number of hydraulic cylinders and filler steel pipes 320 is adjusted according to the amount of one-time indentation of the press-fit body 300 by one stroke of the hydraulic cylinder, and the steel pipes are press-fitted to the lower ground of the expanded reinforcement base 120 to a predetermined depth. .

In this case, it is preferable to press-fit the steel pipe to be supported by the hard ground, and all may be press-fitted to the same depth depending on the structure of the ground, but the press-fitted depths may be different from each other.

In this case, as shown in FIG. 6B, when the existing deeply formed enlarged foundation is cut and the enlarged reinforcement foundation 120 is formed on the base of the cut portion, the press-fit body 300 to be press-fitted is cut at the bottom of the cut portion. It may be supported by existing expansion foundations or by hard soils.

After the press-fitting of the indenter 300 is completed in the lower ground of the expanded reinforcement base 120 by steel pipe indentation, the settled structure 100 is raised by using the press-fitted indenter 300.

That is, the pulling means 500 is installed on the upper end of the press-fit body 300, the lifting means 500, the pulling means 500 may be configured separately, such as a hydraulic cylinder having a larger capacity, the press-in means 400 ) Can be used as it is.

By the pulling means 500, the structure 100 can be raised to the state before settlement, the press-fit member 300 is to support the operation of the hydraulic cylinder, the reaction force is expanded by the reaction force support 200, the reinforcement base Delivered to 120 to result in structure 100 being raised.

At this time, by attaching a conventional strain gage to the structure 100, it is possible to confirm in real time that the structure 100 is raised and restored to the state before settlement.

After confirming the impression of the structure 100, the lifting means 500 and the reaction force support 200 are dismantled in order, and finish the press-fit indentation 300 as shown in Figure 3f.

First, the steel pipe head is cut and adjusted in accordance with the degree of indentation of the indenter 300, and the inside of the indenter 300 is filled with a filler such as concrete (not shown) to raise the concrete filled steel pipe. To function as a foundation pile of the restored structure 100.

Next, as the indenter 300 functions as a foundation pile of the structure 100, the indenter 300 supports the weight of the structure 100 and the like, so that the indenter 300 is integrated with the structure 100.

That is, the indenter 300 is integrated with the lower reaction hole 211 fixed to the enlarged reinforcement base 120, and as a result, serves as a foundation pile of the structure 100.

In this case, the head finishing plate 600 in the form of a circular plate is installed on the upper part of the press-fit body 300, and the upper reinforcement base 120 is fastened to the upper end of the lower reaction hole 211 by a through hole formed in the head finishing plate 600. Lower reaction sphere 211 is fixed to) to be integrated with the indentation body 300 is a steel pipe.

Next, by placing the finishing concrete on the upper surface of the enlarged reinforcement base 120 so that the upper end of the indenter 300 is not exposed, the final indenter 300 and the structure 100 are integrated. Integrate with each other.

5 shows another embodiment of finishing the press-fit body 300, the upper end of the lower reaction sphere 211, which is a reinforcing bar or steel bar, cut and bent to a predetermined length to overlap each other in the upper part of the steel pipe and weld Reaction sphere 211 is wrapped around the upper portion of the steel pipe, and the finishing concrete is placed on the upper surface of the expansion reinforcement base 120 to ensure that the upper end of the indentation body 300 is integrated with the expansion reinforcement base 120 without being exposed. The three-dimensional 300 and the structure 100 is to be integrated with each other.

At this time, between the bent lower reaction sphere 211 and the upper end of the steel pipe is installed a circular reinforcement plate 610 of the circular plate shape to be coupled by welding with each other to integrate the lower reaction sphere 211 and the indentation body 300. Can be.

1A and 1B illustrate a structure pulling and foundation reinforcing method using a conventional indenter.

2A and 2B illustrate an example of applying a structure lifting and foundation reinforcement method using a conventional indenter.

3a to 3f are shown in sequence the construction order of the structure lifting method by the basic reinforcement according to the present invention.

Figure 4 shows a detailed cross-sectional view of the structure lifting method by the foundation reinforcement according to the present invention.

5 illustrates an embodiment of integrating an indenter of the present invention into a structure.

6a and 6b show an application example of the structure lifting method by the basic reinforcement according to the present invention.

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

100: Structure 110: Foundation

120: expansion reinforcement base 200: reaction support

210: reaction hole 220: upper support

300: indentation 400: indentation means

500: raise means 600: tofu finish plate

Claims (6)

In the method of raising the structure using the indenter, Digging around the foundation of the structure; Installing an anchor bar including reinforcing bars on the structure foundation side; Installing the hollow pipe in the vertical direction on the foundation side of the structure, assembling the basic reinforcement to be assembled with the anchor bar, assembling the lower reaction sphere including the reinforcement around the hollow pipe, and placing the concrete to expose the upper end of the lower reaction sphere Forming an enlarged reinforcement base; Connecting a lower end of an upper reaction sphere to an upper end of the lower reaction sphere, and installing a reaction force support by fixing an upper end of the upper reaction sphere to an upper support; Setting the indenter in the indentation hole formed by removing the hollow pipe, and installing and operating a indentation means between an upper end of the indenter and an upper supporter to press the indenter under the structure; And Structural lifting method by the basic reinforcement comprising the step of raising the structure by installing the lifting means on the press-fit indentation. The method of claim 1, After the impression of the structure, the press-fitted indentation is a structure raising method by the basic reinforcement, characterized in that the step of further finishing the integrated process and the lower reaction sphere. The method according to claim 1 or 2, The hollow pipe is a structure raising method by reinforcing the foundation, characterized in that the two are arranged symmetrically around the base of the structure. The method according to claim 1 or 2, The lower reaction sphere and the upper reaction sphere is a structure lifting method by the basic reinforcement, characterized in that connected by a coupler. The method of claim 2, When the structure foundation is deeply formed, after digging around the structure foundation, cutting the structure foundation at a predetermined depth further comprising the structure impression construction method by the foundation reinforcement. The method of claim 5, When the cut structure base is an enlarged foundation, the structure impression method by the reinforcement of the foundation, characterized in that the indentation is supported by the cut expanded base.

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