KR100632809B1 - Underground water level measurement apparatus for underground construction of appartment house - Google Patents

Underground water level measurement apparatus for underground construction of appartment house Download PDF

Info

Publication number
KR100632809B1
KR100632809B1 KR1020050069235A KR20050069235A KR100632809B1 KR 100632809 B1 KR100632809 B1 KR 100632809B1 KR 1020050069235 A KR1020050069235 A KR 1020050069235A KR 20050069235 A KR20050069235 A KR 20050069235A KR 100632809 B1 KR100632809 B1 KR 100632809B1
Authority
KR
South Korea
Prior art keywords
underground
groundwater
rod
underground structure
groundwater level
Prior art date
Application number
KR1020050069235A
Other languages
Korean (ko)
Other versions
KR20060048903A (en
Inventor
이한용
도상익
고봉철
김영춘
Original Assignee
(주)아이티엠 코퍼레이션 건축사사무소
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 (주)아이티엠 코퍼레이션 건축사사무소 filed Critical (주)아이티엠 코퍼레이션 건축사사무소
Priority to KR1020050069235A priority Critical patent/KR100632809B1/en
Publication of KR20060048903A publication Critical patent/KR20060048903A/en
Application granted granted Critical
Publication of KR100632809B1 publication Critical patent/KR100632809B1/en

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/56Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/56Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements
    • G01F23/58Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements using mechanically actuated indicating means
    • G01F23/585Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements using mechanically actuated indicating means using pneumatically or hydraulically actuated indicating means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V9/00Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
    • G01V9/02Determining existence or flow of underground water

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Hydrology & Water Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

본 발명은 공동주택 단지 지하수 유출이 심한 지역의 지하 수위를 검출할 수 있는 지하수위 측정장치에 관한 것이다.The present invention relates to a groundwater level measuring device that can detect the groundwater level in the area where the groundwater outflow is severe.

본 발명은, 공동주택 단지내 지하 구조물에 있어서, 콘크리트 기초판(150); 매설 앵커(160); 덮개(170); 눈금 측정침(180); 지하 정관(200); 에어봉(300); 및 측정봉(400);으로 구성됨을 특징으로 하는 공동주택 단지 지하 구조물 보호용 지하수위 측정장치를 제공한다.The present invention, in the underground structure in the apartment complex, concrete base plate 150; Buried anchor 160; Cover 170; Graduation measuring needle 180; Underground vas deferens 200; Air rod 300; And a measuring rod 400; provides a groundwater level measuring device for protecting the underground structure of the multi-family housing complex.

공동주택, 지하수, 지하수위 측정장치 Apartment, groundwater, groundwater level measuring device

Description

공동주택 단지 지하 구조물 보호용 지하수위 측정장치{UNDERGROUND WATER LEVEL MEASUREMENT APPARATUS FOR UNDERGROUND CONSTRUCTION OF APPARTMENT HOUSE}Groundwater level measuring device for underground structure protection of multi-unit housing complex {UNDERGROUND WATER LEVEL MEASUREMENT APPARATUS FOR UNDERGROUND CONSTRUCTION OF APPARTMENT HOUSE}

도 1은 종래의 지중 구조물에서 발생되는 지하수 침투 문제를 설명하기 위한 도면.1 is a view for explaining the groundwater penetration problem occurring in the conventional underground structure.

도 2는 본 발명의 지하수위 측정장치의 사용 상태를 나타내는 도면.2 is a view showing a state of use of the groundwater level measuring apparatus of the present invention.

도 3은 본 발명의 지하수위 측정장치의 분해 상태를 나타내는 도면.3 is a view showing an exploded state of the groundwater level measuring apparatus of the present invention.

도 4는 본 발명의 지하수위 측정장치를 이용한 물푸기 작업 상태를 나타내는 도면.Figure 4 is a view showing the water discharge operation state using the groundwater level measuring device of the present invention.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

100: 지하 구조물 150: 콘크리트 기초판100: underground structure 150: concrete foundation plate

160: 매설 앵커 170: 덮개160: buried anchor 170: cover

180: 눈금 측정침 200: 지하 정관180: graduation measuring needle 200: underground tube

300: 에어봉 400: 측정봉300: air rod 400: measuring rod

W: 지하수 900: 지하수위 측정장치W: Groundwater 900: Groundwater level measuring device

본 발명은 공동주택 단지를 조성시 지하 구조물에서 지하수에 의해 발생될 수 있는 문제점을 해결하기 위한 지하수위 측정장치에 관한 것이다.The present invention relates to a groundwater level measuring device for solving the problems that can be caused by the groundwater in the underground structure when building a multi-family housing complex.

일반적으로 공동주택 단지를 조성시, 콘크리트를 타설하여 지하 주차장을 시공하기 위한 온통 기초는 대부분 지하에 매설되는 바, 콘크리트 지하 주차장의 모서리 부분에서는 누수의 문제점이 빈번하게 발생된다.In general, when constructing a multi-family housing complex, most of the foundation for constructing an underground parking lot by pouring concrete is mostly buried underground, and problems of leakage occur frequently at the corners of the concrete underground parking lot.

상기 콘크리트 지하 주차장 등과 같은 지하 구조물은, 내부 및 외부에 일정 높이를 지하수의 침투를 방지하기 위한 도막 방수가 처리된다.Underground structures, such as the concrete underground parking lot, the coating film waterproofing to prevent the penetration of groundwater to a certain height inside and outside.

도 1은 종래의 지중 구조물에서 발생되는 지하수 침투 문제를 설명하기 위한 도면으로서, 구조물이 지하에 매설되는 지하 구조물(90)은, 오랜 시간이 흐르면 지하수(W)에 의해 크랙(C)이 발생되어 도시된 바와 같이 지하수(W)가 내측으로 유입되는 누수의 문제점이 발생된다.1 is a view for explaining the groundwater penetration problem occurring in the conventional underground structure, the underground structure 90, the structure is buried underground, crack (C) is generated by the groundwater (W) after a long time As shown, a problem of water leakage caused by the inflow of groundwater (W) to the inside occurs.

도 1에서는 지하수(W)에 따른 벽면의 크랙을 설명하였지만, 지중에 매설되는 지하 구조물(90)에는 벽면뿐만 아니라 모서리면에서 빈번하게 누수의 문제점이 발생되어 구조물의 내구성을 저해하는 문제점이 있다.In FIG. 1, the crack of the wall surface according to the groundwater (W) has been described. However, the underground structure 90 buried in the ground has a problem of frequently leaking from the corner surface as well as the wall surface, thereby deteriorating the durability of the structure.

본 발명은 상술한 문제점을 감안하여, 본 발명은, 지하수에 의한 지하 구조물의 내구성 저하를 방지할 수 있도록 지하수위 측정장치를 설치하여 지하수를 항시 점검하므로 지하 구조물의 내구성을 확보함은 물론, 지하수에 의해 발생될 수 있는 지하 구조물의 누수 현상을 방지할 수 있도록 하는 공동주택 단지 지하 구조물 보호용 지하수위 측정장치를 제공함을 그 목적으로 한다.In view of the above-described problems, the present invention, by installing a groundwater level measuring device to prevent the degradation of the underground structure by the groundwater at all times to check the groundwater at all times to ensure the durability of the underground structure, as well as groundwater It is an object of the present invention to provide a groundwater level measuring device for protecting underground structures of multi-unit housing complexes to prevent the leakage of underground structures that may be caused by.

본 발명은 상술한 목적 달성을 위해, 본 발명은, 공동주택 단지내 지하 구조물에 있어서, 콘크리트 기초판; 매설 앵커; 덮개; 눈금 측정침; 지하 정관; 에어봉; 및 측정봉;으로 구성됨을 특징으로 한다.The present invention to achieve the above object, the present invention, in the underground structure in the apartment complex, concrete base plate; Buried anchors; cover; Graduation needle; Underground articles of incorporation; Air rods; And a measuring rod.

이하, 첨부 도면을 참조하여 본 발명의 구성을 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention is demonstrated with reference to an accompanying drawing.

도 2는 본 발명의 지하수위 측정장치의 사용 상태를 나타내는 도면이고, 도 3은 본 발명의 지하수위 측정장치의 분해 상태를 나타내는 도면이며, 도 4는 본 발명의 지하수위 측정장치를 이용한 물푸기 작업 상태를 나타내는 도면이다.2 is a view showing a state of use of the groundwater level measuring apparatus of the present invention, Figure 3 is a view showing an exploded state of the groundwater level measuring apparatus of the present invention, Figure 4 is a water discharge using the groundwater level measuring apparatus of the present invention It is a figure which shows a working state.

지하 구조물(100)에는, 그 인접 측면으로 지하수위 측정장치(900)가 설치되어 지하수위를 수시로 측정하여 지하수위가 상승되는 경우, 펌프(500)를 이용하여 배출 파이프(510)를 지하 정관(200)의 내측으로 설치하여 지하수(W)를 외부처리하므로 지하 구조물(100)의 침하를 예방하게 된다.In the underground structure 100, when the groundwater level measuring device 900 is installed at an adjacent side thereof and the groundwater level is increased by measuring the groundwater level at any time, the underground pipe may be discharged using the pump 500. It is installed to the inside of the 200 to treat the groundwater (W) externally to prevent the settlement of the underground structure (100).

상기 지하 구조물(100)에는 상부 토사면에 콘크리트가 타설되어 콘크리트 기초판(150)이 형성되고, 상기 콘크리트 기초판(150)에는 상부에 매설 앵커(160)가 돌출되도록 콘크리트가 타설되기전 설치된다.Concrete is placed on the upper soil surface in the basement structure 100 to form a concrete base plate 150, the concrete base plate 150 is installed before the concrete is laid so that the buried anchor 160 is projected on the top. .

상기 매설 앵커(160)에는 상부에 덮개(170)가 설치되어 너트(164)로 고정되는 한편, 상기 덮개(170)는, 내부가 관통되는 부재로, 하부 플랜지(172)의 상부에 원통 몸체(174)가 일체로 형성되고, 하부 플랜지(172)와 원통 몸체(174)에 각각 볼트홀(173)과 측정봉홀(175)이 형성되며, 원통 몸체(174)의 측면에 체결 볼트부(176)가 수평으로 형성된다.The buried anchor 160 has a cover 170 installed at an upper portion thereof and fixed with a nut 164, while the cover 170 is a member through which the inside is penetrated, and has a cylindrical body at an upper portion of the lower flange 172. 174 is formed integrally, and the bolt hole 173 and the measuring rod hole 175 are formed in the lower flange 172 and the cylindrical body 174, respectively, the fastening bolt portion 176 on the side of the cylindrical body 174 Is formed horizontally.

상기 덮개(170)는, 측면의 체결 볼트부(176)에 눈금 측정침(180)이 체결되는 한편, 상기 눈금 측정침(180)은 중앙이 90°각도로 절곡되는 부재로, 상부에 수평한 침부(182)가 형성되고 하부 수직부에 볼트홀(184)이 형성된다.The cover 170, the graduation needle 180 is fastened to the fastening bolt portion 176 of the side, while the graduation needle 180 is a member that is bent at a 90 ° angle in the center, horizontal The needle portion 182 is formed and a bolt hole 184 is formed in the lower vertical portion.

상기 콘크리트 기초판(150)에는, 시공전에 하부에 지하 정관(200)이 위치되도록 설치되며, 상기 지하 정관(200)은, 내측이 관통되어 일측 하부에 발톱(220)이 형성되고, 하부에 물구멍(210)이 형성되며, 타측 상부가 오픈되는 원통형 부재로, 상기 지하 정관(200)은 지하 구조물(100)의 하부 바닥면보다 깊게 설치된다.The concrete foundation plate 150 is installed so that the basement pipe 200 is positioned at the bottom before the construction, the basement pipe 200 is penetrated inside the claw 220 is formed on one side, the water hole at the bottom 210 is formed, the other side is a cylindrical member that is open, the basement pipe 200 is installed deeper than the bottom bottom surface of the underground structure (100).

상기 지하 정관(200)에는, 내측에 유입된 지하수에 의해 부력이 발생되도록 에어봉(300)이 원통형 형태로 형성되는 한편, 상기 에어봉(300)은, 원통형 형태로 형성된 몸체 상부에 볼트부(310)가 형성된다.The base rod 200, the air rod 300 is formed in a cylindrical shape so that buoyancy is generated by the groundwater introduced into the inside, while the air rod 300 is a bolt portion (top) 310 is formed.

상기 에어봉(300)은 상부에 측정봉(400)이 체결되는 한편, 상기 측정봉(400)은, 봉형태로, 외측에 눈금(410)이 도시되고, 하부에 연결 나사부(420)가 형성되어 에어봉(300)의 상부와 결합된다.The air rod 300 is a measuring rod 400 is fastened to the upper side, while the measuring rod 400 is in the form of a rod, the scale 410 is shown on the outside, the connection screw portion 420 is formed at the bottom It is combined with the upper portion of the air rod 300.

상술한 구성에서 알 수 있듯이, 상기 지하 구조물(100)의 측면에 입설되는 지하수위 측정장치(900)는, 지하수(W)의 수위가 지하 구조물(100)의 높이(H)의 반이상이 되는 경우, 펌프(500)를 이용하여 지하수를 외부로 배출시키게 된다.As can be seen from the above-described configuration, the groundwater level measuring device 900 installed on the side of the underground structure 100, the water level of the groundwater (W) is at least half of the height (H) of the underground structure (100) In this case, the groundwater is discharged to the outside using the pump 500.

즉, 지하수(W)의 수압에 의해 지하 구조물(100)의 파손을 예방할 수 있도록 지하수의 전고, 즉 높이(H)의 반이상이 측정되는 경우 지하수를 외부 배출시키게 된다.That is, when the height of the groundwater, that is, more than half of the height (H) is measured to prevent the damage of the underground structure 100 by the water pressure of the groundwater (W) is to discharge the groundwater to the outside.

상술한 본 발명의 구성에 의한 효과를 설명한다.The effect by the structure of this invention mentioned above is demonstrated.

본 발명은, 지하수위 측정장치를 지하 구조물의 측면에 설치하여 지하수의 수위가 높이(H)의 반이상이 되는 경우 펌프를 이용하여 지하수를 외부 배출하게 되므로, 지하수 수압에 의해 지하 구조물에 영향을 미치는 문제점을 해결함과 아울러, 그로 인해 지하 구조물에 발생될 수 있는 크랙(CRACK; 또는 틈새면)에 의한 내구성 저하를 방지할 수 있게 되는 효과를 갖는다.According to the present invention, when the groundwater level measuring device is installed on the side of the underground structure, the groundwater is discharged to the outside by using a pump when the groundwater level becomes more than half the height (H), thereby affecting the underground structure by the groundwater pressure. In addition to solving the problem, there is an effect that can prevent the degradation of durability due to cracks (CRACK; or gap surface) that may occur in the underground structure.

또한, 지하수에 의해 발생될 수 있는 지하 구조물의 누수 현상을 방지할 수 있도록 하는 효과를 갖는다.In addition, there is an effect to prevent the leakage of the underground structure that can be generated by the groundwater.

Claims (1)

공동주택 단지내 지하 구조물에 있어서, In the underground structure in the apartment complex, 상기 지하 구조물(100)의 상부 토사면에 콘크리트가 타설되어 형성되는 콘크리트 기초판(150); Concrete base plate 150 is formed by pouring concrete on the upper soil surface of the underground structure 100; 상기 콘크리트 기초판(150)에 매설되고 절곡되는 형태로 형성된 매설 앵커(160); Buried anchor 160 formed in a form that is embedded and bent in the concrete base plate 150; 상기 매설 앵커(160)의 상부에 설치되어 너트(164)로 고정되는 한편, 내부가 관통되고, 하부 플랜지(172)의 상부에 원통 몸체(174)가 일체로 형성되며, 하부 플랜지(172)와 원통 몸체(174)에 각각 볼트홀(173)과 측정봉홀(175)이 형성되며, 원통 몸체(174)의 측면에 체결 볼트부(176)가 수평으로 형성된 덮개(170); The upper part of the buried anchor 160 is fixed to the nut 164, while the inside is penetrated, the cylindrical body 174 is integrally formed on the upper portion of the lower flange 172, the lower flange 172 and A bolt hole 173 and a measuring rod hole 175 respectively formed in the cylindrical body 174, and a cover 170 in which a fastening bolt part 176 is horizontally formed on a side of the cylindrical body 174; 상기 덮개(170)의 측면 체결 볼트부(176)에 결합되어 너트로 체결되는 한편, 중앙이 90°각도로 절곡되고, 상부에 수평한 침부(182)가 형성되며, 하부 수직부에 볼트홀(184)이 형성된 눈금 측정침(180); It is coupled to the side fastening bolt portion 176 of the cover 170 is fastened with a nut, while the center is bent at an angle of 90 °, a horizontal needle 182 is formed on the upper portion, the bolt hole ( 184 the graduation measuring needle 180 is formed; 상기 콘크리트 기초판(150)의 수직한 하부에 매설되어 설치되는 한편, 내측이 관통되어 일측 하부에 발톱(220)이 형성되고, 하부에 물구멍(210)이 형성되며, 타측 상부가 오픈되도록 형성시킨 지하 정관(200); The concrete foundation plate 150 is installed buried in a vertical lower portion, while the inner side is penetrated through the claw 220 is formed on one side, the water hole 210 is formed in the lower, the other side is formed to open Underground vas deferens 200; 상기 지하 정관(200)의 내측에 유입된 지하수에 의해 부력이 발생되도록 원통형 형태로 형성되는 한편, 몸체 상부에 볼트부(310)가 형성된 에어봉(300); 및 Air rod 300 is formed in a cylindrical shape so that buoyancy is generated by the ground water introduced into the inner tube 200, the bolt portion 310 is formed on the upper portion of the body; And 상기 에어봉(300)의 볼트부(310)에 체결되는 한편, 봉형태로, 외측에 눈금 (410)이 도시되고, 하부에 연결 나사부(420)가 형성된 측정봉(400);으로 구성됨을 특징으로 하는 공동주택 단지 지하 구조물 보호용 지하수위 측정장치.It is fastened to the bolt portion 310 of the air rod 300, in the form of a rod, the scale 410 is shown on the outside, the measuring rod 400 is formed in the lower connection screw portion 420; Groundwater level measuring device for protecting underground structures of multi-unit housing complexes.
KR1020050069235A 2005-07-29 2005-07-29 Underground water level measurement apparatus for underground construction of appartment house KR100632809B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020050069235A KR100632809B1 (en) 2005-07-29 2005-07-29 Underground water level measurement apparatus for underground construction of appartment house

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020050069235A KR100632809B1 (en) 2005-07-29 2005-07-29 Underground water level measurement apparatus for underground construction of appartment house

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
KR20-2004-0031982U Division KR200374280Y1 (en) 2004-11-12 2004-11-12 Underground water level measurement apparatus for underground construction of appartment house

Publications (2)

Publication Number Publication Date
KR20060048903A KR20060048903A (en) 2006-05-18
KR100632809B1 true KR100632809B1 (en) 2006-10-13

Family

ID=37149895

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020050069235A KR100632809B1 (en) 2005-07-29 2005-07-29 Underground water level measurement apparatus for underground construction of appartment house

Country Status (1)

Country Link
KR (1) KR100632809B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102038770B1 (en) * 2018-04-30 2019-11-26 강원대학교산학협력단 Measuring an apparatus for measuring upwelling or downwelling in stream

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104236668B (en) * 2013-06-07 2017-10-03 攀钢集团钛业有限责任公司 Molten salt chlorination furnace liquid level detection device and method and fused salt chlorimation equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102038770B1 (en) * 2018-04-30 2019-11-26 강원대학교산학협력단 Measuring an apparatus for measuring upwelling or downwelling in stream

Also Published As

Publication number Publication date
KR20060048903A (en) 2006-05-18

Similar Documents

Publication Publication Date Title
CN105421500A (en) Basement anti-floating system based on low horizontal grout curtain and depressurization through water drawing
KR100926183B1 (en) Underground cave with waterproof structure
KR100632809B1 (en) Underground water level measurement apparatus for underground construction of appartment house
KR200374280Y1 (en) Underground water level measurement apparatus for underground construction of appartment house
JP6029015B2 (en) Cavity check and lifting pressure removal device and installation method
JP4877558B2 (en) Concrete civil engineering structure
KR20060116765A (en) Apparatus and method for draining subsurface water and the connecting device for the same
KR100686954B1 (en) Vertical degree measurement construction of pier for bridge
JP2008095352A (en) Small-scale building provided with countermeasures against liquefaction
KR101366139B1 (en) draining plate assembly
CN207700175U (en) A kind of protective device to burying inclined tube
KR100801915B1 (en) Underground construction member for safety measurement
KR200206706Y1 (en) Under ground water of fluctuation determinater
KR20080073264A (en) Sensor apparatus for confirming of filling grout for installing caisson
KR200376807Y1 (en) Water level measure apparatus of underground construction for building
KR100588261B1 (en) Earth sinking measurement apparatus of smooth area for appartment house
KR100334841B1 (en) Under ground water of fluctuation determinater
KR100477623B1 (en) Suppotrer wall sturcture of underground construction for building
CN211348641U (en) Basement soil layer observation pier structure of earthquake observation station
CN220203021U (en) Basement waterproof construction
CN210104480U (en) Drainage structure of road slope protection intercepting drain and outlet
CN216689819U (en) Waterproof structure of building engineering
KR100856066B1 (en) Testing device for installing caisson
CN210421104U (en) Water collecting device for ultra-deep foundation pit
CN215053716U (en) Prevent blockking up prefabricated floor drain

Legal Events

Date Code Title Description
A108 Dual application of patent
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20120925

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20130925

Year of fee payment: 8

FPAY Annual fee payment

Payment date: 20140929

Year of fee payment: 9

FPAY Annual fee payment

Payment date: 20150921

Year of fee payment: 10

LAPS Lapse due to unpaid annual fee