KR101857722B1 - Reinforced apparatus for culvert - Google Patents

Reinforced apparatus for culvert Download PDF

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Publication number
KR101857722B1
KR101857722B1 KR1020170139243A KR20170139243A KR101857722B1 KR 101857722 B1 KR101857722 B1 KR 101857722B1 KR 1020170139243 A KR1020170139243 A KR 1020170139243A KR 20170139243 A KR20170139243 A KR 20170139243A KR 101857722 B1 KR101857722 B1 KR 101857722B1
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KR
South Korea
Prior art keywords
reinforcing bar
culvert
bar
horizontal
reinforcing
Prior art date
Application number
KR1020170139243A
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Korean (ko)
Inventor
김동수
Original Assignee
휴먼이엔씨 주식회사
김동수
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Priority to KR1020170139243A priority Critical patent/KR101857722B1/en
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Publication of KR101857722B1 publication Critical patent/KR101857722B1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2200/00—Geometrical or physical properties
    • E02D2200/14—Geometrical or physical properties resilient or elastic
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00—Miscellaneous
    • E02D2600/20—Miscellaneous comprising details of connection between elements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00—Miscellaneous
    • E02D2600/40—Miscellaneous comprising stabilising elements

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Sewage (AREA)

Abstract

The present invention relates to an apparatus for reinforcing a culvert, which comprises: a first reinforcing bar disposed at a left side of a culvert; a second reinforcing bar disposed at a right side of the culvert and connected to the first reinforcing bar; and an interval control unit installed between the first reinforcing bar and a second reinforcing bar to control the interval between the first reinforcing bar and the second reinforcing bar so as to enable the first reinforcing bar and the second reinforcing bar to come in close contact with an inner wall surface of the culvert. Therefore, the present invention can support the entire inner wall of the culvert so as to increase reinforcing performance and easily installed in the culvert.

Description

{REINFORCED APPARATUS FOR CULVERT}

The present invention relates to a culvert reinforcement device which firmly supports the entire four sides of a culvert to prolong the life of the culvert.

In general, culverts are used in various ways such as a passage through which water flows, a cable for electric communication, a pipe for harmonizing with water, and a storage passage of agricultural and marine products, or a passageway for pedestrians.

Such a culvert has a problem that its durability is weakened by the external pressure such as the pressure of the passing water, the erosion of the ground or the vertical load as the use period passes.

In order to solve this problem, when the entire culvert is replaced, the cost increases and it is impossible to replace the culvert if there is a structure on the buried ground.

Therefore, two methods are currently used to reinforce the strength of the culvert by installing reinforcing devices in the culvert.

In the conventional culvert reinforcement method, as disclosed in Korean Patent Registration No. 10-1686993 (Dec. 09, 2016), a bracket member in which a housing space for accommodating a hydraulic jack is fixed is fixed to both inner sides of a culvert, A hydraulic jack is provided, a support member for forming a thread in the hydraulic jack is provided, a nut member is screwed to the support member, and a beam member is mounted on the upper end of the hydraulic jack so that the beam member supports the upper side wall of the culvert do.

However, such a conventional culvert reinforcement method has a complicated structure such as fixing the bracket member to both side surfaces of the culvert, providing a hydraulic jack, and installing a beam member in the hydraulic jack, which increases the construction cost.

In addition, since the conventional culvert reinforcing method only supports the upper surface of the culvert, both side surfaces and the bottom surface of the culter can not be reinforced at all.

Korean Patent Registration No. 10-1686993 (December 09, 2016)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a culvert reinforcement device which is simple in structure and simple in installation in a culvert, and can be easily installed and cost can be reduced.

Another object of the present invention is to provide a culvert reinforcement device capable of supporting the entire four sides of a culvert, thereby improving the strength of the culvert.

It is still another object of the present invention to provide a culvert reinforcement device in which the reinforcing bar is provided with an elastic force so that the inner wall surface of the culver is supported by the elastic force of the reinforcing bar,

In order to achieve the above object, the culvert strengthening apparatus of the present invention comprises a first reinforcing bar disposed on the left side of the culvert, a second reinforcing bar disposed on the right side of the culvert and connected to the first reinforcing bar, And a gap adjusting unit installed between the reinforcing bar to adjust the gap between the first reinforcing bar and the second reinforcing bar so that the first reinforcing bar and the second reinforcing bar are brought into close contact with the inner wall surface of the culvert.

The first reinforcing bar includes a first vertical part contacting the left inner surface of the culvert, a first horizontal part connected to the upper inner surface of the culvert in a horizontal direction at an upper end of the first vertical part, And a second horizontal portion connected in the horizontal direction and contacting the inner bottom surface of the culvert. The second reinforcing bar is connected to the second vertical portion contacting the inner surface of the right side of the culvert and horizontally at the upper end of the second vertical portion, And a fourth horizontal portion connected in a horizontal direction at a lower end of the second vertical portion and contacting the lower inner surface of the culvert to support the entire inner wall surface of the culvert.

The first reinforcement bar and the second reinforcement bar may have a circular cross section, a semicircular cross section, an elliptical cross section, a rectangular cross section, or a polygonal cross section.

A connecting portion is formed between the second horizontal portion of the first reinforcing bar and the fourth horizontal portion of the second reinforcing bar, the connecting portion includes a concave portion formed in a concave shape at an end portion of the second horizontal portion, And a convex portion protruding from an end portion of the fourth horizontal portion and inserted into the concave portion.

Further comprising a positioning portion for aligning the first reinforcing bar and the second reinforcing bar with the first reinforcing bar and the second reinforcing bar and fixing the first reinforcing bar and the second reinforcing bar to the culvert, wherein the positioning portion is formed on the left inner surface and the right inner surface of the culvert And a positioning pin protruding from the first reinforcing bar and the second reinforcing bar and inserted into the positioning groove.

And the inner diameter (D1) of the positioning groove portion is formed to be larger than the outer diameter (D2) of the positioning pin (80).

The gap adjusting unit includes a first female screw portion formed on the first horizontal portion of the first reinforcing bar, a second female screw portion formed on the third horizontal portion of the second reinforcing bar, A second adjustment bar screwed to the second internal thread; an adjustment bolt fixed to the first adjustment bar and the second adjustment bar to rotate the first adjustment bar and the second adjustment bar; And a second fixing bolt screwed to the second adjusting bar to fix the second adjusting bar so as not to be loosened by the second adjusting screw, .

The first horizontal portion of the first reinforcing bar and the third horizontal portion of the second reinforcing bar are convex upward and are elastically supported to elastically support the upper inner surface of the culvert.

The second horizontal portion of the first reinforcing bar and the fourth horizontal portion of the second reinforcing bar are convex downward and are formed to have an elastic force to elastically support the lower inner surface of the culvert.

Further comprising a protection member installed to surround the culvert reinforcing device to protect the culvert to prevent the culvert reinforcement device from being detached from the culvert by an object contained in water pressure or water passing through the inside of the culvert, The first reinforcing bar and the second reinforcing bar are provided with a first protection part for covering the first horizontal part of the first reinforcing bar and a fourth horizontal part of the second reinforcing part and a second protection part covering the part of the first vertical part of the first reinforcing bar, And a third protective portion extending vertically from the other end of the first protective portion to cover the second vertical portion of the second reinforcing bar.

1 is a perspective view of a culvert reinforcing apparatus according to an embodiment of the present invention mounted on a culvert.
2 is a perspective view of a culvert reinforcement apparatus according to an embodiment of the present invention.
3 is a cross-sectional view of a culvert reinforcement device according to an embodiment of the present invention mounted on a culvert.
4 is a cross-sectional view of a gap adjusting unit according to an embodiment of the present invention.
5 is a front view of a culvert reinforcement apparatus according to another embodiment of the present invention.
6 is a perspective view of a cage reinforcing apparatus according to an embodiment of the present invention, in which a protection member is mounted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

FIG. 1 is a perspective view of a culvert reinforcing apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view of a culvert reinforcing apparatus according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, the culvert reinforcing apparatus according to one embodiment is mounted on the inner wall surface of the culvert 10 having four sides at a plurality of intervals along the longitudinal direction of the culvert 10.

The culvert 10 has a rectangular cross-section, and an inclined surface 12 is formed at a corner portion. The inner wall surface of the culvert 10 is composed of an upper inner surface 14, a left inner surface 16, a right inner surface 18 and a lower inner surface 20, And supports the culvert 10 as a whole.

3, the culver strengthening apparatus 30 includes a first reinforcing bar 32 disposed on the left side of the culvert 10 and a second reinforcing bar 32 disposed on the right side of the culvert 10 and provided with a first reinforcing bar 32 A first reinforcement bar 32 and a second reinforcement bar 34 which are connected to each other and a second reinforcement bar 34 which interconnects the first reinforcement bar 32 and the second reinforcement bar 34, And a gap adjusting unit 36 for adjusting the first reinforcing bar 32 and the second reinforcing bar 34 so as to be brought into close contact with the inner wall surface of the cage 10.

The first reinforcing bar 32 is connected to the first vertical part 40 contacting the left inner surface 16 of the culvert 10 and the first vertical part 40 connected horizontally at the upper end of the first vertical part 40, A first horizontal part 42 contacting the upper inner surface 14 and a second horizontal part 42 connected horizontally at the lower end of the first vertical part 40 and contacting the lower inner surface 20 of the culvert 10 44).

When the slope 12 is formed at the edge of the culvert 10, the first vertical part 40 and the first horizontal part 42 and between the first vertical part 40 and the second horizontal part 44, A first inclined portion 46 is formed.

The second reinforcing bar 34 is connected to the second vertical portion 50 contacting the right inner surface 18 of the culvert 10 and the second vertical portion 50 connected horizontally at the upper end of the second vertical portion 50, A third horizontal portion 52 contacting the upper inner surface 14 and a fourth horizontal portion 52 connected horizontally at the lower end of the second vertical portion 50 and contacting the lower inner surface 20 of the culvert 10 54).

When the inclined surface 12 is formed at the corner of the culvert 10, the second vertical portion 50 and the fourth horizontal portion 54 are formed between the second vertical portion 50 and the third horizontal portion 52, The second inclined portion 56 is formed.

The shapes of the first reinforcement bar 32 and the second reinforcement bar 34 may be changed according to the inner surface shape of the culvert 10 and have the same shape as the inner surface shape of the culvert.

The first reinforcement bar 32 and the second reinforcement bar 34 are formed of a metal material having sufficient strength to support the culvert 10 and may have a circular, semicircular, elliptical, rectangular, And can be formed in various shapes depending on the type and shape of the culvert.

For example, when the cross section of the first reinforcing bar 32 and the second reinforcing bar 34 is semicircular, the flat portion is brought into contact with the inner wall surface of the culvert and the semicircular portion is exposed to the outside, The adhesion to the inner wall surface can be improved.

Connection portions 62 and 64 are formed to be interconnected between the second horizontal portion 44 of the first reinforcing bar 32 and the fourth horizontal portion 54 of the second reinforcing bar 34. The connecting portions 62 and 64 include a concave portion 62 formed in a concave shape at the end portion of the second horizontal portion 44 and a concave portion 62 formed to protrude from the end portion of the fourth horizontal portion 54, 62 which are inserted into the protruding portions 64. As shown in Fig.

That is, when the first reinforcement bar 32 and the second reinforcement bar 34 are assembled in the cage 10, the first reinforcement bar 32 and the second reinforcement bar 34 are provided on the left and right sides of the cage 10, The lower end of the first reinforcement bar 32 and the lower end of the second reinforcement bar 34 are connected to each other, so that the assembling is easy and simple.

When the first reinforcing bar 32 and the second reinforcing bar 34 are pressed in the outward direction by operating the spacing adjusting unit 36 disposed on the inner wall surface of the culvert 10, There is a possibility that the bar 32 and the second reinforcing bar 34 are separated from the installation position. In addition, the first reinforcing bar 32 and the second reinforcing bar 34 may be separated from the original position due to the water pressure of the water passing through the inside of the culvert 10, thereby failing to perform the reinforcing function.

In order to solve such a problem, the first reinforcing bar and the second reinforcing bar are fixed to the inner wall surface of the cage 10 by using an anchor bolt or the like. In this case, a step of fixing the anchor bolts to the culvert and a step of fixing the first reinforcing bars and the second reinforcing bars to the anchors are required, which complicates assembly.

In the present invention, a positioning part for aligning the mounting positions of the first reinforcing bar 32 and the second reinforcing bar 34 and preventing the first reinforcing bar and the second reinforcing bar from being detached from the mounting position is formed.

The positioning portions 80 and 82 are provided with a positioning groove portion 82 formed on the left inner surface and the inner surface on the right side of the cage 10 and a positioning groove portion 82 projecting respectively from the first reinforcing bar 32 and the second reinforcing bar 34 And a positioning pin 80 formed in the positioning recessed portion 82 and inserted into the positioning recessed portion 82.

Here, the inner diameter D1 of the positioning groove portion 82 is formed to be larger than the outer diameter D2 of the positioning pin 80, so that the first reinforcing bar 32 and the second reinforcing bar 34 are inserted into the culvert 10 So that the assembly can be carried out conveniently.

When the positioning pins 80 of the first reinforcing bars 32 and the second reinforcing bars 34 are inserted into the positioning grooves 82 formed on the inner surface of the cage 10 as described above, And the second reinforcing bar 34 are aligned with each other and the installation positions of the first reinforcing bar 32 and the second reinforcing bar 34 are prevented from being changed.

4, the gap adjusting unit 36 includes a first female threaded portion 96 formed on the first horizontal portion 42 of the first reinforcing bar 32 and a second female threaded portion 96 formed on the second reinforcing bar 34 A second female screw portion 98 formed on the third horizontal portion 52 and a first adjustment bar 90 threadedly engaged with the first female screw portion 96 and a second adjustment screw 90 screwed on the second female screw portion 98 A second control bar 92 and a control bolt 94 for fixing the first control bar 90 and the second control bar 92 by fixing the first control bar 90 and the second control bar 92, .

The first control bar 90 and the second control bar 92 are moved in the direction in which the first control bar 90 is inserted into the first female threaded portion 96 when the threaded lines are formed opposite to each other and rotated in one direction And the second control bar 92 is moved in the direction in which it is inserted into the second female screw portion 98.

The first adjusting bar 90 is screwed with a first fixing bolt 104 for fixing the adjusting position after the length of the first adjusting bar 90 is adjusted, After the length adjustment of the second control bar 92 is completed, a second fixing bolt 102 for fixing the adjustment position is screwed.

When the adjusting bolt 94 is rotated using a tool after the first reinforcing bar 32 and the second reinforcing bar 34 are disposed on the inner surface of the culvert 10, The second adjusting bar 92 is moved in the direction in which the first adjusting screw 90 is pulled out from the first female screw portion 96 and the second adjusting bar 92 is moved in the drawing direction from the second female screw portion 98, 2 reinforcement bars 34 are brought into close contact with the inner wall surface of the culvert 10 so that the first reinforcement bar 32 and the second reinforcement bar 34 can support the culver 10.

5 is a side view of a culvert reinforcement apparatus according to another embodiment of the present invention.

The culvert reinforcing device according to another embodiment is the same as the culvert reinforcing device described in the above embodiment and is similar to the culvert reinforcing device according to the first embodiment except that the first horizontal portion 42 of the first reinforcing bar 32 and the second reinforcing bar 34 of the second reinforcing bar 34 3 horizontal portion 52 is formed in a convex shape upward and is formed to have an elastic force by itself to elastically support the upper inner surface of the culvert 10.

The second horizontal portion 44 of the first reinforcing bar 32 and the fourth horizontal portion 54 of the second reinforcing bar 34 are also formed in a downward convex shape and have a self- (10).

As described above, the first reinforcing bar 32 and the second reinforcing bar 34 elastically support the inner wall surface of the cage 10 by self-elastic force, so that the reinforcing performance can be further improved.

6 is a perspective view showing a state in which a protection member is mounted on the culvert reinforcement apparatus according to the present invention.

The protection member 110 is installed so as to surround the culvert 30 and is installed in the culvert 10 by the water pressure of water passing through the inside of the culvert 10 or collision with an object contained in water. The first protection part 112 covers the second horizontal part 44 of the first reinforcing bar 32 and the fourth horizontal part 54 of the second reinforcing bar 34, A second protection part 114 extending vertically from one end of the first protection part 112 to cover a part of the first vertical part 40 of the first reinforcing bar 32, And a third protection part 116 extending vertically from the other end of the second reinforcing bar 34 to cover the second vertical part 50 of the second reinforcing bar 34.

The culvert reinforcing apparatus 30 is protected by the protection member 110 so that various objects contained in the water pressure and water contained in the water passing through the culvert 10 collide against the culvert strengthening apparatus 30, From detaching from the culvert (10).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

10: culvert 30: culvert reinforcement
32: first reinforcing bar 34: second reinforcing bar
36: gap adjusting unit 40: first vertical part
42: first horizontal part 44: second horizontal part
50: second vertical part 52: third horizontal part
54: fourth horizontal part 80: positioning pin
82: Positioning groove

Claims (11)

A first reinforcing bar disposed on the left side of the culvert;
A second reinforcing bar disposed on the right side of the culvert and connected to the first reinforcing bar;
A gap adjusting unit installed between the first reinforcing bar and the second reinforcing bar to adjust the gap between the first reinforcing bar and the second reinforcing bar so that the first reinforcing bar and the second reinforcing bar are pressed against the inner wall surface of the culvert; And
And an alignment unit for aligning the installation positions of the first reinforcing bar and the second reinforcing bar and preventing the first reinforcing bar and the second reinforcing bar from being separated from the installation position of the culvert,
Wherein the positioning portion includes a positioning groove portion formed on a left inner surface and a right inner surface of the cage and a positioning pin protruding from the first reinforcing bar and the second reinforcing bar and inserted into the positioning groove portion, . The method according to claim 1,
The first reinforcing bar includes a first vertical part contacting the left inner surface of the culvert, a first horizontal part connected to the upper inner surface of the culvert in a horizontal direction at an upper end of the first vertical part, And a second horizontal portion connected in the horizontal direction and contacting the lower inner surface of the culvert,
The second reinforcing bar has a second vertical part contacting the inner surface of the right side of the culvert, a third horizontal part connected in the horizontal direction at the upper end of the second vertical part and contacting the upper inner surface of the culvert, And a fourth horizontal portion connected to the lower inner surface of the culvert to support the entire inner wall surface of the culvert. 3. The method of claim 2,
Wherein the first reinforcement bar and the second reinforcement bar are formed in a shape of a circular, semicircular, elliptical, quadrangular, or polygonal cross-section. 3. The method of claim 2,
A connecting portion is formed between the second horizontal portion of the first reinforcing bar and the fourth horizontal portion of the second reinforcing bar, the connecting portion includes a concave portion formed in a concave shape at an end portion of the second horizontal portion, And a convex portion protruding from an end portion of the fourth horizontal portion and inserted into the concave portion. delete delete The method according to claim 1,
And the inner diameter (D1) of the positioning groove portion is formed larger than the outer diameter (D2) of the positioning pin (80). 3. The method of claim 2,
The gap adjusting unit includes a first female screw portion formed on a first horizontal portion of the first reinforcing bar,
A second female screw portion formed on a third horizontal portion of the second reinforcing bar,
A first adjustment bar screwed into the first female screw portion,
A second adjusting bar screwed into the second female screw portion,
An adjusting bolt fixed to the first adjusting bar and the second adjusting bar to rotate the first adjusting bar and the second adjusting bar,
A first fixing bolt screwed to the first adjusting bar to fix the first adjusting bar so as not to be loosened by the first adjusting screw,
And a second fixing bolt screwed to the second adjusting bar to fix the second adjusting bar so as not to be loosened by the second internal thread. 3. The method of claim 2,
Wherein the first horizontal portion of the first reinforcing bar and the third horizontal portion of the second reinforcing bar are convex upward and are elastically supported to elastically support the upper inner surface of the culvert. 3. The method of claim 2,
Wherein the second horizontal portion of the first reinforcing bar and the fourth horizontal portion of the second reinforcing bar are convex downward and are formed to have an elastic force to elastically support the lower inner surface of the culvert. 3. The method of claim 2,
Further comprising a protection member installed to enclose the culvert reinforcing device to protect the culvert to prevent the culvert reinforcement device from being detached from the culvert by the water pressure of water passing through the inside of the culvert or an object contained in water,
The protection member may include a first protection portion covering the second horizontal portion of the first reinforcing bar and the fourth horizontal portion of the second reinforcing portion, and a second protection portion extending vertically from one end of the first protection portion, And a third protection part extending vertically from the other end of the first protection part to cover the second vertical part of the second reinforcing bar.
KR1020170139243A 2017-10-25 2017-10-25 Reinforced apparatus for culvert KR101857722B1 (en)

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KR1020170139243A KR101857722B1 (en) 2017-10-25 2017-10-25 Reinforced apparatus for culvert

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001152535A (en) * 1999-11-30 2001-06-05 Hazama Gumi Ltd Reinforcing structure for existing culvert
KR20050032962A (en) * 2003-10-02 2005-04-08 정순용 Reinforcing method of structures with opposite loading
JP2010077746A (en) * 2008-09-29 2010-04-08 Railway Technical Res Inst Method for cutting and reinforcing lining concrete structure of tunnel
KR20110093140A (en) * 2010-02-11 2011-08-18 (주)대성 Corrugated steel plate structures
JP2012193577A (en) * 2011-03-17 2012-10-11 Taisei Corp Reinforcing method of existent covering and reinforcing apparatus
KR101686993B1 (en) 2015-08-17 2016-12-28 지엘콘(주) Reinforcement method of culvert

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001152535A (en) * 1999-11-30 2001-06-05 Hazama Gumi Ltd Reinforcing structure for existing culvert
KR20050032962A (en) * 2003-10-02 2005-04-08 정순용 Reinforcing method of structures with opposite loading
JP2010077746A (en) * 2008-09-29 2010-04-08 Railway Technical Res Inst Method for cutting and reinforcing lining concrete structure of tunnel
KR20110093140A (en) * 2010-02-11 2011-08-18 (주)대성 Corrugated steel plate structures
JP2012193577A (en) * 2011-03-17 2012-10-11 Taisei Corp Reinforcing method of existent covering and reinforcing apparatus
KR101686993B1 (en) 2015-08-17 2016-12-28 지엘콘(주) Reinforcement method of culvert

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