KR20170048943A - Precast concrete segment for preventing of damage end part and manufacturing method of the same - Google Patents

Precast concrete segment for preventing of damage end part and manufacturing method of the same Download PDF

Info

Publication number
KR20170048943A
KR20170048943A KR1020150149658A KR20150149658A KR20170048943A KR 20170048943 A KR20170048943 A KR 20170048943A KR 1020150149658 A KR1020150149658 A KR 1020150149658A KR 20150149658 A KR20150149658 A KR 20150149658A KR 20170048943 A KR20170048943 A KR 20170048943A
Authority
KR
South Korea
Prior art keywords
segment
precast concrete
protective member
segment body
end portion
Prior art date
Application number
KR1020150149658A
Other languages
Korean (ko)
Other versions
KR101805106B1 (en
Inventor
문도영
강태성
Original Assignee
경성대학교 산학협력단
강태성
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 경성대학교 산학협력단, 강태성 filed Critical 경성대학교 산학협력단
Priority to KR1020150149658A priority Critical patent/KR101805106B1/en
Publication of KR20170048943A publication Critical patent/KR20170048943A/en
Application granted granted Critical
Publication of KR101805106B1 publication Critical patent/KR101805106B1/en

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/08—Lining with building materials with preformed concrete slabs
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/02—Public or like main pipe systems
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/04—Domestic or like local pipe systems
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F3/00—Sewer pipe-line systems
    • E03F3/04—Pipes or fittings specially adapted to sewers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/08—Lining with building materials with preformed concrete slabs
    • E21D11/086—Methods of making concrete lining segments
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D13/00—Large underground chambers; Methods or apparatus for making them

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Civil Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Health & Medical Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

The present invention relates to a pre-cast concrete segment comprising a plurality of segments arranged adjacent to each other to form an inner wall surface, the segment segment comprising a segment body formed of a concrete material and a pre-cast concrete segment surrounding a side of the segment body, Provides a cast concrete segment.
Therefore, it is possible to prevent breakage due to joining between the segments at the time of construction, detachment of end portions, and breakage, thereby improving the performance and reliability of the product, and it is possible to improve the performance and reliability of the product. It has good corrosion resistance, and it can prevent the resistivity and the communication trouble due to reinforcing bars when applying electric power and communication port. It also has excellent performance due to chemical erosion when waterway, drainage water, and wastewater tunnel are applied, It is also excellent in resistance.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a precast concrete segment and a manufacturing method thereof,

The present invention relates to a precast concrete segment that can prevent breakage of an end portion and a method of manufacturing the same. More particularly, the present invention can prevent breakage due to contact between segments at the time of tunnel construction and improve corrosion resistance, The present invention relates to a precast concrete segment and a method of manufacturing the precast concrete segment, which can prevent breakage of the end portion, which can improve the economical efficiency, without the need of separately installing a joining device for joining the segments.

Generally, the segment is a piece (piece) used to form the inner wall of the tunnel excavated during construction of a tunnel called shield construction, and the precast segment is assembled in the factory after being manufactured at the factory. Which can reduce noise and civil complaints and shorten the working time, thus making it possible to shorten the construction period. An example of a technique for such a segment is disclosed in U.S. Patent Application Publication No. 2012-0127473 which discloses a tower segment in which reinforced concrete bodies are connected by joints.

However, in the conventional precast concrete segment described above, due to the jack thrust during the assembling process in the course of moving the member or in the field, the segments made of the concrete come into contact with each other, . In addition, conventional precast segments are vulnerable to chemical erosion during application of tunnels, waterways, drainage wastewater, and wastewater tunnels due to the properties of concrete.

In addition, the above-described conventional precast concrete segment must be provided with a steel material joining apparatus (bolt box) for joining the segments together in a manufacturing process in a structure that forms a wall surface of a tunnel. However, since the conventional precast concrete segment is manufactured by separately manufacturing a joining apparatus and then joining the joining apparatus to the segment, there is a problem that the manufacturing process is troublesome due to the installation of the joining apparatus and the cost increases accordingly.

Korean Patent Publication No. 2012-0127473

It is an object of the present invention to provide a method of manufacturing a semiconductor device capable of preventing end breakage of a segment and improving the performance by being strong against chemical erosion and preventing breakage of the end portion, It is an object of the present invention to provide a precast concrete segment and a manufacturing method thereof.

According to an aspect of the present invention, there is provided a precast concrete segment comprising a plurality of segments disposed adjacent to each other to form an inner wall surface, the segment comprising a segment body formed of a concrete material and a protection member formed of synthetic resin material Provided is a precast concrete segment capable of preventing breakage of an end portion.

According to another aspect of the present invention, there is provided a precast concrete segment comprising a plurality of segments disposed adjacent to each other to form an inner wall surface of a tunnel, the segments being formed of a segment body formed by pouring and curing concrete in an arc shape, and FRP material, A plurality of coupling grooves for coupling with the exponent material are formed on the outer side surface of the segment body adjacent to each other, and a protection member having a segment joint formed to be connected to each other and connected to each other, To provide a precast concrete segment that can be used as a precast concrete segment.

According to still another aspect of the present invention, there is provided a method of manufacturing a precast concrete segment in which a plurality of blocks are disposed adjacent to each other to form an inner wall surface, the method comprising: molding synthetic resin into a mold to produce a tubular protective member And a step of securing the protective member to the inner surface of the segmented frame and casting and curing concrete inside the protective member of the segmented frame to produce a precast concrete segment. A method for manufacturing a cast concrete segment is provided.

A precast concrete segment and a method of manufacturing the same that can prevent breakage of the end portion according to the present invention provide the following effects.

First, it is possible to prevent breakage due to joining between the segments at the time of construction, detachment of end portions, and breakage, thereby improving the performance and reliability of the product.

Secondly, since the segment joint portion is formed integrally with the protective member, it is possible to omit the step of separately manufacturing and installing the steel joining apparatus (bolt box) for the existing inter-segment inter-segment joint portion, And it is possible to improve the economical efficiency.

Third, it is made of reinforcement-free reinforcement structure, so it has good corrosion resistance, unlike the conventional reinforcing steel and steel reinforcement structure, and can prevent the resistivity and the communication trouble due to reinforcing bars when the power source and communication port are applied.

Fourth, waterway, drainage, and wastewater tunnel are excellent in performance due to chemical erosion and excellent in salt water resistance.

Fifthly, since the place where the amount of sunlight is projected is small, the protection member formed of synthetic resin material (FRP) is very low in possibility of damage due to ultraviolet rays, so durability can be maintained.

1 is a perspective view illustrating a precast concrete segment according to an embodiment of the present invention.
2 is a plan view of Fig.
3 is a cross-sectional view taken along line III-III in Fig.
4 is a front view of Fig.
Fig. 5 is an enlarged view showing the engaging part of Fig. 4;
Figure 6 is a bottom view of Figure 1;
Fig. 7 is a plan view showing another embodiment of the support of Fig. 1. Fig.
8 is a perspective view showing a coupling relationship of the support portion in Fig.
9 is a flow chart illustrating a method of manufacturing a precast concrete segment according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, a plurality of precast concrete segments 400 (hereinafter, referred to as 'segments') capable of preventing breakage of ends according to an embodiment of the present invention are disposed adjacent to each other, And includes a segment body 100, a protective member 200, and a support portion 300. [

The segment body 100 is manufactured by pouring and curing concrete as a concrete material. The segment body 100 described above has an arc shape as a whole for a tunnel, and can be applied to a tunnel, a power section, and a communication section. However, it should be understood that the segment body 100 may be used for other purposes than the tunnel, and the shape of the segment body 100 may be variously changed. Here, the reference numeral 110 is a through hole for rear grouting of the segment body 100 and construction, handling, and movement of the segment.

The protective member 200 surrounds the side surface of the segment body 100 to prevent the end portion from falling off or breaking, and also prevents damage due to contact during construction.

Here, it is preferable that the protective member 200 is wrapped along the side of the rim that contacts the other adjacent segment body 100 at the time of construction. However, in a preferred embodiment of the present invention, the protective member 200 may extend inwardly from the upper and lower ends to a certain extent so as to prevent the segment body 100 from being separated, The present invention is not limited thereto.

The protective member 200 is made of a synthetic resin material that elastically surrounds the side surface of the segment body 100 made of concrete and is made of a synthetic resin material and is made of fiber reinforced plastics material in consideration of workability and strength. .

Referring to FIGS. 4 and 5, the protective member 200 has a coupling part 210 for coupling with an exponent material on four sides. In detail, the coupling portion 210 is formed with a plurality of coupling grooves that can be easily fitted with the exponent as shown in FIG. However, the shapes and the like can be variously changed according to the structure of the exponent material applied to the preferred embodiment. Meanwhile, the index material is provided at a joint portion of the segment 400 to prevent water leakage and the like, which is the same as that of a known exponent material, and thus a detailed description thereof will be omitted.

Referring to FIG. 6, the protective member 200 is integrally formed with a segment joint 220 for connecting the segments 400 to each other. The segment joint 220 is formed between a segment and a ring, and is formed as a known bolt box, and is integrally formed with the protective member 200. Here, the reference numeral 221 denotes a bolt hole for bolt fastening.

In other words, the protective member 200 can be manufactured by integrally forming the segment joints together during the molding process, so that it is possible to omit the step of separately manufacturing the existing bolt box and joining the same to the segments, It is possible to reduce the manufacturing cost of the bolt box, thereby reducing the overall manufacturing cost and improving the economical efficiency.

Although the segment joint 220 is illustrated as an example of a bolt box in the drawings, the segment joint 220 is applicable to various structures such as a structure in which an injection pipe other than a bolt box for connecting between segments can be connected. to be.

The support part 300 is connected to the protection member 200 on upper and lower surfaces except the side of the edge of the segment body 100 to support the concrete body 100 to prevent the concrete body 100 from being separated As well as reinforcing tensile performance. The tensile performance of the reinforcing concrete structure is similar to that of reinforcing steel, and the supporting part 300 can exhibit similar tensile performance without reinforcing the reinforcement material such as reinforcing steel in the segment body 100 .

In detail, the support portion 300 is connected to opposite side surfaces of the protection member 200 at both sides in the form of a bar. At this time, the support part 300 may be integrally formed with the protection member 200, and may be manufactured at the time of manufacturing the protection member 200.

Alternatively, the support portion 300 may be manufactured separately from the protection member 200 and may be connected to the protection member 200. The supporting part 300 is formed in a bar shape and has a fitting groove formed in a side surface facing the protecting member 200 so that it can be fitted to the side surface of the protecting member 200, And is bonded to the protective member 200 using an adhesive means.

Meanwhile, the support part 300 is made of a synthetic resin material, and it is possible to reinforce the reinforcement material such as glass fiber to the synthetic resin in consideration of the same material or tensile performance as the protection member 200 .

7, the support part 300 is disposed across the upper and lower surfaces of the segment body 100, and the arrangement direction of the support part 300 is arranged in consideration of a direction in which the segment body 100 receives mainly the force . That is, the supporting part 300 is arranged so as to correspond to the direction (longitudinal direction) in which the segment body 100 is bent as shown in the figure. However, in one embodiment, the support portion 300b may be disposed not only in the longitudinal direction but also in the width direction, as described above, or may be arranged in a cross shape in which the longitudinal direction and the width direction overlap each other. Referring to FIG. 8, when the supporting portions 300 and 300b are formed in a cross shape, the supporting portion 300 may have a through hole 330 in the width direction, 300b are assembled with each other and then joined to the protective member 200.

The supporting part 300 has a protruding part 310 having a substantially T-shaped cross section and protruding inward with the segment body 100. The protrusion 310 prevents lifting or shaking of the protection member 200 from the segment body 100.

The supporting part 300 is formed in a shape corresponding to the side shape of the protection member 200 facing both ends and has a fitting groove 320 for fitting into a side surface of the protection member 200 . Accordingly, the support part 300 is fitted to the protection member 200 in a state in which the adhesive means is applied to the fitting groove 320. Here, the bonding means can be variously applied as long as the above object can be achieved, such as an adhesive for bonding known resins.

In addition, the segment 400 may have a reinforcing steel reinforcing structure capable of securing a tensile performance even if the reinforcing net is not provided through the supporting portion 300. In comparison with the conventional steel reinforcing reinforcing steel structure, It is good in corrosion resistance, and it can prevent the effect of resistivity and communication failure due to reinforcing bars when applied to electric power and communication area. In addition, the segment 400 has excellent performance in chemical erosion when applied to waterways, drainage water, wastewater, tunnels, and the like, and is also excellent in resistance to salt water (seawater).

Hereinafter, a method of manufacturing the segment 400 will be described.

Referring to FIG. 9, a method of manufacturing a precast concrete segment according to an embodiment of the present invention includes a step S100 of manufacturing a protective member 200, a step S200 of manufacturing a precast concrete segment 400, .

First, in step S100, the protective member 200 is manufactured by injection molding synthetic resin (including FRP) into a mold. At this time, the molded protective member 200 is formed in the above-described upper and lower tubular shape, so that the inner circumferential side of the mold can cover the edge of the segment body 100 corresponding to the shape of the segment body 100 .

The step of forming the protective member 200 may include integrally forming the segment joint 220 such as a bolt box on the mold so that the segment joint 220 is integrally formed when the protective member 200 is manufactured. As shown in Fig. This makes it possible to remarkably reduce the workability and cost as compared with a method of separately manufacturing and joining existing segment joints.

The protective member 200 may be integrally formed with the support portion 300. In this case, the mold of the protective member 200 is designed to integrally form the support portion 300.

Alternatively, when the protective member 200 and the support portion 300 are separately bonded, the opposite ends of the support portion 300 may be connected to the upper surface of the protection member 200 through the fitting groove 320, And the protective member 200 and the supporting portion 300 are bonded to each other through a bonding means such as an adhesive.

Meanwhile, when the protective member 200 is manufactured, the support 300 may be integrally manufactured.

When the protective member 200 is manufactured through the mold as described above, the protective member 200 is fixed to the inner surface of the segment mold, and the concrete is inserted into the protective member 200 of the segmented mold, And cured to produce precast concrete segments (S200).

As described above, the precast concrete segment 400 and the manufacturing method thereof are composed of a segment body 100 made of a concrete material and a protective member 200 surrounding the outer edge surface of the segment body 100, It is possible to effectively prevent the detachment of the end portion that may occur during the installation, thereby securing the reliability after the installation, and securing the improved performance even in the case of chemical erosion such as corrosion resistance. The precast concrete segment 400 and the method of manufacturing the same may be modified such that the segment joint portion 220 is integrally formed at the time of manufacturing the protective member 200 so as not to separately manufacture the segment joint portion 200, Therefore, it is easy to manufacture and the cost can be reduced.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100 ... segment body 110 ... through hole
200 ... protective member 210 ... engaging portion
220 ... segment joint 300, 300b ... support
310 ... protruding portion 320 ... fitting groove
400,400b ... Precast Concrete Segment

Claims (14)

A precast concrete segment comprising a plurality of walls joined together to form an inner wall surface,
A segment body formed of a concrete material; And
A precast concrete segment that can prevent damage to the end portion including the protective member formed of a synthetic resin material while covering the side surface of the segment body. The method according to claim 1,
Wherein,
Wherein the end of the segment body adjacent to the edge of the segment body is prevented from being broken. The method of claim 2,
And a support portion connected to the protection member on an upper surface, a lower surface, an upper surface, and a lower surface of the segment body excluding the edge side of the segment body. The method of claim 3,
The support portion
Wherein both ends of the segment body are capable of preventing breakage of an end portion that is connected to mutually opposite sides of the protective member across an upper surface and a lower surface of the segment body. The method of claim 3,
The support portion
Wherein the protection member is formed of a plastic material. The method of claim 3,
The support portion
And the end of the end portion of the precast concrete segment which is fitted and joined to the protective member through the fitting groove can be prevented from being damaged. The method of claim 3,
The support portion
And a protruding portion protruding inwardly in the direction of the segment body. The pre-cast concrete segment can prevent breakage of the end portion. The method according to claim 1,
Wherein,
A precast concrete segment capable of preventing breakage of an end portion formed with a coupling portion for coupling an exponential member to a side surface. The method according to any one of claims 1 to 8,
Wherein,
Precast concrete segments that can prevent damage to the ends of FRP (fiber reinforced plastics) materials. The method of claim 9,
Wherein,
Wherein the segment joints for connecting the segment bodies to each other are prevented from being damaged. The method of claim 9,
Wherein the segment body is formed in an arc shape so as to form an inner wall surface of a tunnel to prevent breakage of an end portion formed for a tunnel. A method of manufacturing a precast concrete segment in which a plurality of blocks are disposed adjacent to each other to prevent breakage of an end portion constituting an inner wall surface,
Inserting and molding a synthetic resin into the mold of the protective member to manufacture a hollow protective member penetrating through the mold; And
A method of manufacturing a precast concrete segment, the method comprising the steps of: fixing the protective member to the inner surface of a segment mold and casting and curing concrete inside the protective member to produce a precast concrete segment; . The method of claim 12,
Wherein,
Wherein the pre-cast concrete segment is formed by integrally forming a segment joint for interconnecting the precast concrete segments. The method according to claim 12 or 13,
A supporting portion joining step of joining the both ends of the supporting portion to the protective member by sandwiching the opposite end portions of the supporting portion on the upper side or the lower side face of the protecting member via the joining means and preventing the breakage of the end portion, Method of manufacturing concrete segments.
KR1020150149658A 2015-10-27 2015-10-27 Precast concrete segment for preventing of damage end part and manufacturing method of the same KR101805106B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150149658A KR101805106B1 (en) 2015-10-27 2015-10-27 Precast concrete segment for preventing of damage end part and manufacturing method of the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150149658A KR101805106B1 (en) 2015-10-27 2015-10-27 Precast concrete segment for preventing of damage end part and manufacturing method of the same

Publications (2)

Publication Number Publication Date
KR20170048943A true KR20170048943A (en) 2017-05-10
KR101805106B1 KR101805106B1 (en) 2017-12-05

Family

ID=58744136

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150149658A KR101805106B1 (en) 2015-10-27 2015-10-27 Precast concrete segment for preventing of damage end part and manufacturing method of the same

Country Status (1)

Country Link
KR (1) KR101805106B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107893665A (en) * 2017-11-06 2018-04-10 山东建筑大学 A kind of prefabricated assembled composite supporting construction mounting process based on shaped steel
CN116968164A (en) * 2023-09-12 2023-10-31 江苏丰和隧道设备有限公司 Intelligent shield segment steam curing ex-warehouse control method and system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4956251B2 (en) * 2007-03-26 2012-06-20 東京都 Segment for shield method
JP2009138389A (en) * 2007-12-05 2009-06-25 Kajima Corp Supporting member, and construction method for widened section of tunnel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107893665A (en) * 2017-11-06 2018-04-10 山东建筑大学 A kind of prefabricated assembled composite supporting construction mounting process based on shaped steel
CN107893665B (en) * 2017-11-06 2019-07-05 山东建筑大学 A kind of prefabricated assembled composite supporting construction mounting process based on fashioned iron
CN116968164A (en) * 2023-09-12 2023-10-31 江苏丰和隧道设备有限公司 Intelligent shield segment steam curing ex-warehouse control method and system
CN116968164B (en) * 2023-09-12 2024-02-06 江苏丰和隧道设备有限公司 Intelligent shield segment steam curing ex-warehouse control method and system

Also Published As

Publication number Publication date
KR101805106B1 (en) 2017-12-05

Similar Documents

Publication Publication Date Title
JP5132005B2 (en) Earthquake-resistant reinforced concrete watertight pipe rod and method for manufacturing the same
KR101805106B1 (en) Precast concrete segment for preventing of damage end part and manufacturing method of the same
KR20110002514A (en) Precast concrete culvert block
JP2008045333A (en) Water stop material and water cut-off structure of elastic joint
JP4496994B2 (en) Double flexible joint mounting structure
KR101065936B1 (en) Manholes and its synthetic resin manufacturing methods
KR100536069B1 (en) Fabricated pc culvert reinforced with socket and bracket
JP2009068217A (en) Joint structure of concrete structure and method of constructing the same
JP4537225B2 (en) Flexible waterproof joint and its construction method
KR20070106410A (en) The Assembled Precast Reinforced Concrete Culverts of Connectting with Steel Bar.
KR200387868Y1 (en) Fabricated pc culvert reinforced with socket and bracket
KR100909111B1 (en) Connecting pipe for manhole and method of manufacturing concrete manhole using the same
KR100642295B1 (en) Connecting pipe of manhole and that coupling struction
KR101580547B1 (en) A precast box culvert with watertight band
KR101047895B1 (en) Prefabricated waterway module for waterway for leak prevention and assembly convenience
KR101014838B1 (en) Device for water proof and stagnant water interception in joints of precast culvert
KR200461040Y1 (en) Manhole with pipe
KR101283556B1 (en) expansion joint for agriculture channels and this construction technique
KR100600500B1 (en) The underdrain construction method of having used tube structure for underdrain installation, and this
KR100912438B1 (en) Expansion joint for agriculture channels and this construction technique with sliding anchor
KR101053677B1 (en) A manhole
KR100911607B1 (en) Gasket Reclamation Type Culvert
JP5502433B2 (en) Joining member for water stop of concrete waterway material and method for joining concrete waterway material
KR100690626B1 (en) Plastic Pipe Connecting Device and Water flowing Plastic Pipe having The Same
KR100620562B1 (en) Method of manufacturing manhole using connecting pipe

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right