KR19990027292U - Formulated Steel Sheet for Underground Structure - Google Patents
Formulated Steel Sheet for Underground Structure Download PDFInfo
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- KR19990027292U KR19990027292U KR2019970039881U KR19970039881U KR19990027292U KR 19990027292 U KR19990027292 U KR 19990027292U KR 2019970039881 U KR2019970039881 U KR 2019970039881U KR 19970039881 U KR19970039881 U KR 19970039881U KR 19990027292 U KR19990027292 U KR 19990027292U
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- steel sheet
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- steel plate
- underground
- cylindrical
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/32—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
- E04C2/322—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material with parallel corrugations
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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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
본 고안은 원통형으로 조립되는 강판부재의 단면구조를 사다리형으로 개선하여 가격이 저렴한 일반구조용 체결부재의 사용이 가능해져 보울트체결에 의한 지중구조물의 조립작업을 간편하게 수행하고, 시공성을 향상시킬수 있고, 제작비를 절감할수 있는 지중구조물용 제형강판에 관한 것이다.The present design improves the cross-sectional structure of the steel plate member to be assembled in a cylindrical shape to enable the use of inexpensive fastening members for general structures, thus simplifying the assembly work of underground structures by bolting, and improving construction performance. It relates to a formulation steel sheet for underground structures that can reduce the manufacturing cost.
본 고안은 원통형의 지중구조물(100)을 구성하도록 복수개 조립되는 강판부재에 있어서, 사다리형의 단면으로 형성된 골(12)과 산(13)을 폭방향으로 갖추고, 길이방향으로 일정곡률 휘어진 일정길이의 강판부재(1a)를 갖추고, 상기 강판부재(1a)의 선,후단 골(12)과 산(13)에는 평평한 접촉면을 갖는 체결부재(14)를 체결할수 있도록 체결공(15)을 각각 천공하며, 상기 강판부재(1a)의 양측 산(13)에는 상기 체결부재(14)를 체결할수 있도록 체결공(15)을 일정간격으로 형성하여 상기 지중구조물(100)을 구성하도록 원통 원주,길이방향으로 연결조립됨을 특징으로 지중구조물용 제형강판을 제공한다.The present invention is provided with a plurality of steel sheet members assembled to form a cylindrical underground structure 100, having a valley 12 and the peak 13 formed in the cross-section in the width direction, a certain length bent in a longitudinal direction curvature A steel plate member 1a of the steel plate, and drills the fastening holes 15 so as to fasten the fastening member 14 having a flat contact surface to the line, the rear end valley 12 and the hill 13 of the steel plate member 1a. Cylindrical circumference and length directions are formed at both ends of the steel plate member 1a to form the fastening holes 15 at regular intervals so as to fasten the fastening member 14. It provides a formulated steel sheet for underground structures, characterized in that the connection assembly.
Description
본 고안은 원통형으로 조립되는 강판부재의 단면구조를 사다리형으로 개선하여 가격이 저렴한 일반구조용 체결부재의 사용이 가능해져 보울트체결에 의한 지중구조물의 조립작업이 간편해지고, 시공성을 향상시킬 수 있고, 제작비를 절감할수 있는 지중구조물용 제형강판에 관한 것이다.The present invention improves the cross-sectional structure of the steel plate member that is assembled in a cylindrical shape to a ladder type, so that the use of inexpensive general structural fastening members can be used, thereby simplifying the assembling work of underground structures by bolting, and improving workability. It relates to a formulation steel sheet for underground structures that can reduce the manufacturing cost.
일반적으로 도로공사에서는 신설되는 도로나 하천과 교차되는 장소에서 차량,하천흐름을 공사에 관계없이 원할하게 소통시킬수 있도록 비상통로 역할을 하는 지중구조물을 사전에 제작하여 그 교차지점에 설치하는바, 이러한 지중구조물(100)은 보울트로서 연결조립되는 복수개의 대형 파형강판으로서 대형차량까지도 통과시킬수 있도록 6000㎜이상의 직경크기를 갖는 원통형 구조로 구성되는 것이다.In general, in the road construction, the underground structures that serve as emergency passages are prepared in advance and installed at the intersections so that vehicles and river flows can be communicated smoothly regardless of construction. Underground structure 100 is a plurality of large corrugated steel sheet to be assembled as a bolt is composed of a cylindrical structure having a diameter size of 6000mm or more to pass even a large vehicle.
이러한 지중구조물(100)의 조립작업은 도 1과 2에 도시한 바와같이, 파형강판(101)의 선단일부와 또다른 파형강판(101)의 후단일부를 겹치기하면, 그 선,후단의 골,산(102),(103)부위에 천공된 복수개의 체결공(109)이 서로 일치되기 때문에, 상기 체결공(109)에 복수개의 보울트(104a), 너트(104c) 및 와셔(104b)와 같은 체결부재(109)를 체결하여 상기 파형강판(101)을 원주방향으로 조립하는 것이다.As shown in Figs. 1 and 2, the assembling work of the underground structure 100 overlaps one end portion of the corrugated steel sheet 101 with the rear end portion of another corrugated steel sheet 101, and the valleys of the line, the rear end, Since the plurality of fastening holes 109 drilled on the mountains 102 and 103 coincide with each other, a plurality of bolts 104a, nuts 104c, and washers 104b are formed in the fastening holes 109. The fastening member 109 is fastened to assemble the corrugated steel sheet 101 in the circumferential direction.
그리고, 조립된 파형강판(101)의 일측단 산(103)부위와 또다른 파형강판(101)의 일측단 산(103)부위를 서로 겹치기하면, 상기 산(103)부위에 일정간격으로 천공된 체결공(109)이 서로 일치되기 때문에, 상기와 마찬가지로 체결부재(105)를 체결하고, 상기 파형강판(101)을 길이방향으로 길게 연속적으로 조립함으로서 대구경의 원통형으로 조립완성하는 것이다.Then, when the one end acid 103 portion of the assembled corrugated steel sheet 101 and the one end acid 103 portion of another corrugated steel sheet 101 overlap each other, a hole is drilled at a predetermined interval on the acid 103 portion. Since the fastening holes 109 coincide with each other, the fastening member 105 is fastened in the same manner as described above, and the corrugated steel sheet 101 is continuously assembled in the longitudinal direction for a long time to complete the assembly in a large diameter cylindrical shape.
그러나, 파형으로 굴곡되어 곡선으로 형성된 상기 파형강판(101)의 골(102),산(103)부위에서의 외형구조상, 도 2에 도시한 바와같이, 상기 파형강판(101)의 산(103)부위에서의 체결작업은 위로 볼록하게 굴곡진 산(103)의 하부측에 조립되도록 특수제작된 보울트(104a)와, 이에 맞추어 특수제작된 한쌍의 와셔(104b)와 너트(104c)로 이루어진 체결부재(104)를 별도로 준비하여 이들만을 이용하여 체결작업을 수행해야만 하고, 상기 파형강판(101)의 골(102)부위에서의 결합작업은 아래로 볼록하게 굴곡진 골(102)의 상부측에 접하도록 상기 체결부재(104)의 보울트(104a),와셔(104b)와 다른 형태로 특수제작된 또다른 체결부재(미도시)를 준비하여 이를 체결해야만 하기 때문에, 작업자가 상기 파형강판(101)의 골(102)부위와 산(103)부위에서 체결되는 적합한 보울트와 와셔를 각각 신중히 구별하면서 체결작업을 수행해야하는 것이다. 이러한 경우, 상기 파형강판(101)의 보울트조립시간이 길어져 지중구조물(100)의 시공성을 저하시킴은 물론, 작업자의 부주의로 인하여 체결부재(104)를 서로 바꾸어 조립하면, 상기 체결부재(104)가 손상되어 체결력을 상실하게 되는 문제점이 있었다. 또한, 특수제작되는 체결부재(104)는 전량 외국에서 수입해야만 하는 고가품이기 때문에, 상기 지중구조물(100)의 제작비용이 상승되는 문제점이 있었다.However, as shown in FIG. 2, the peak 103 of the corrugated steel sheet 101 is shown in FIG. 2 due to the external structure of the valley 102 and the peak 103 of the corrugated steel sheet 101 that are curved and curved in a corrugated form. The fastening operation at the site is made of a bolt 104a specially manufactured to be assembled on the lower side of the convexly curved mountain 103, and a fastening member composed of a pair of washer 104b and a nut 104c specially manufactured accordingly. The preparation 104 should be prepared separately and the fastening operation should be performed using only these, and the joining operation at the valley 102 portion of the corrugated steel sheet 101 is in contact with the upper side of the valley 102 which is convexly curved downward. In order to prepare and fasten another fastening member (not shown) specially manufactured in a different form from the bolt 104a and the washer 104b of the fastening member 104, the operator of the corrugated steel sheet 101 Each suitable bolt and washer, which are fastened at the valley 102 and the hill 103, respectively, It is necessary to perform the tightening operation with careful distinction. In this case, the bolt assembling time of the corrugated steel sheet 101 is increased, thereby lowering the workability of the underground structure 100, as well as changing the fastening members 104 due to carelessness of the operator. There was a problem that the damage is lost fastening force. In addition, since the fastening member 104 to be manufactured specially is an expensive product that must be imported entirely from foreign countries, there is a problem in that the manufacturing cost of the underground structure 100 is increased.
따라서, 본 고안은 상술한 바와같은 문제점을 해소하기 위하여 안출된 것으로서, 그 목적은 저가인 일반구조용 체결부재를 사용할수 있도록 강판구조를 제형단면으로 갖춤으로서 조립작업시 체결부재의 선별이 불필요하여 체결작업이 간편해져 지중구조물의 시공성을 향상시킬수 있고, 제작비용을 절감할 수 있는 지중구조물의 제형강판을 제공하고자 한다.Therefore, the present invention has been devised to solve the problems described above, and its purpose is to equip the steel plate structure with a cross-section of the formulation so that a low cost general structural fastening member can be used, so that the selection of the fastening member is unnecessary when assembling. To simplify the work can improve the construction of the underground structure, and to provide a steel sheet formulation of the underground structure that can reduce the manufacturing cost.
도 1은 일반적으로 지중구조물을 조립하는 작업을 도시한 작업상태도,1 is a working state diagram showing the operation of assembling underground structures in general,
도 2는 종래기술에 따른 지중구조물용 파형강판을 도시한 조립사시도,Figure 2 is an assembled perspective view showing a corrugated steel sheet for underground structures according to the prior art,
도 3은 본 고안에 따른 지중구조물용 제형강판을 도시한 조립도,3 is an assembly view showing a formulation steel sheet for underground structures according to the present invention,
도 4는 본 고안에 따른 지중구조물용 제형강판을 도시한 종단면도.Figure 4 is a longitudinal sectional view showing a formulation steel sheet for underground structures according to the present invention.
< 도면의 주요부분에 대한 부호의 설명 ><Description of Symbols for Major Parts of Drawings>
1 ...... 제형강판 1a ......강판부재1 ...... Formulation steel sheet 1a ...... Steel sheet member
12,102 ..... 골 13,103 ..... 산12,102 ..... Goal 13,103 ..... Mountain
14 ..... 체결부재 15 ..... 체결공14 ..... Fasteners 15 ..... Fasteners
100 .... 지중구조물 101 .... 파형강판100 .... Underground Structure 101 .... Corrugated Steel Sheet
상기와 같은 목적을 달성하기 위하여 본 고안은, 원통형의 지중구조물을 구성하도록 복수개 조립되는 강판부재에 있어서, 사다리형의 단면으로 형성된 골과 산을 폭방향으로 갖추고, 길이방향으로 일정곡률 휘어진 일정길이의 강판부재를 갖추고, 상기 강판부재의 선,후단 골과 산에는 평평한 접촉면을 갖는 체결부재를 체결할수 있도록 체결공을 각각 천공하며, 상기 강판부재의 양측 산에는 상기 체결부재를 체결할수 있도록 체결공을 일정간격으로 형성하여 상기 지중구조물을 구성하도록 원통 원주,길이방향으로 연결조립됨을 특징으로 지중구조물용 제형강판을 을 마련함에 의한다.In order to achieve the above object, the present invention, in a plurality of steel sheet members assembled to form a cylindrical underground structure, having a valley and a cross formed in the cross-section of the ladder in the width direction, a certain length bent in a certain curvature in the longitudinal direction A steel sheet member of the steel sheet member, and drills the fastening holes to fasten the fastening member having a flat contact surface to the line, the rear end valley and the acid of the steel sheet member, and the fastening hole to fasten the fastening member to the both sides of the steel sheet member. By forming a predetermined interval to form the underground structural steel sheet, characterized in that the assembly is connected in the cylindrical circumference, length direction to form the underground structure.
이하, 본 고안을 첨부한 도면에 따라서 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
도 3은 본 고안에 따른 지중구조물용 제형강판을 도시한 조립구조도이고, 도 4는 본 고안에 따른 지중구조물용 제형강판을 도시한 종단면도이다.Figure 3 is an assembly structure showing a structural steel sheet for underground structures according to the present invention, Figure 4 is a longitudinal cross-sectional view showing a structural steel sheet for underground structures according to the present invention.
본 고안에 따른 지중구조물용 제형강판(1)은 도 3 과 4에 도시한 바와같이,원통형의 지중구조물(100)을 구성하도록 복수개의 체결부재(14)로서 원통 원주, 길이방향으로 연속 연결조립되는 강판부재(1a)로서, 이러한 강판부재(1a)는 종래의 파형강판(101)과 마찬가지로 일정피치간격으로 골(12)과 산(13)을 폭방향으로 형성하며, 상기 골(12)과 산(13)은 사다리형의 단면구조로 형성되는 한편, 연속조립시 일정크기의 내경을 갖는 원통형으로 조립되도록 사다리형 단면구조로 골(12)과 산(13)이 형성된 강판부재(a)는 일정곡률로 휘어져 갖추어진다.Formulated steel plate 1 for underground structures according to the present invention is a plurality of fastening members 14 to form a cylindrical underground structure 100, as shown in Figures 3 and 4, continuous connection assembly in the cylindrical circumference, longitudinal direction As the steel sheet member 1a, the steel sheet member 1a forms the valleys 12 and the peaks 13 in the width direction at regular pitch intervals as in the conventional corrugated steel sheet 101, and the valleys 12 and The hill 13 is formed in a ladder-shaped cross-sectional structure, while the steel plate member a in which the valleys 12 and the hill 13 are formed in a ladder-shaped cross-sectional structure so as to be assembled into a cylindrical shape having a predetermined inner diameter during continuous assembly. It is bent at a certain curvature.
그리고, 상기 강판부재(1a)의 선,후단에 형성된 각 골(12)과 산(13)의 평평한 상부면에는 또다른 강판부재(1a)의 선단 또는 후단과의 겹침조립시 서로 일치되는 체결공(15)을 각각 천공형성함으로서, 일치된 상기 체결공(15)에 평평한 접촉면을 갖는 평보울트(14a), 평와셔(14b), 평너트(14c)로 이루어진 일반구조용 체결부재(14)를 간편하게 체결하여 상기 강판부재(1a)를 원통 원주방향으로 조립할수있는 것이다.In addition, each of the valleys 12 formed on the line and the rear end of the steel plate member 1a and the flat upper surface of the mountain 13 are fastened to coincide with each other when overlapping assembly with the front end or the rear end of another steel plate member 1a. By punching each of 15, a general structural fastening member 14 consisting of a flat bolt 14a, a flat washer 14b, and a flat nut 14c having a flat contact surface against the corresponding fastening hole 15 is easily formed. By fastening the steel sheet member (1a) can be assembled in the cylindrical circumferential direction.
그리고, 사다리형의 단면구조로 이루어진 골(12)과 산(13)을 갖는 상기 강판부재(1a)의 양측 산(13)의 평평한 상부면에는 길이방향으로 복수개의 체결공(15)을 천공함으로서, 또다른 강판부재(1a)의 측단과의 겹침조립시 일치되는 상기 체결공(15)에 상기와 같은 일반구조용 체결부재(14)를 체결하여 상기 강판부재(1a)를 원통 길이방향으로 연속적으로 조립할 수 있는 것이다. 그리고, 원통형의 지중구조물(100)을 구성하도록 복수개 조립되는 상기 강판부재(1a)는 모두 동일한 일정피치로 사리리형의 단면구조로 이루어진 골(12)과 산(13)을 형성하며, 동일한 관통크기 및 배치로 체결공(15)을 형성하는 한편, 동일한 일정곡률로 제작되어야 한다.And, by drilling a plurality of fastening holes 15 in the longitudinal direction on the flat upper surface of the both ends of the steel plate member (1a) having a valley 12 and the peak 13 of the ladder-shaped cross-sectional structure In addition, the general structural fastening member 14 is fastened to the fastening hole 15, which is matched at the time of overlapping assembly with the side end of another steel sheet member 1a, so that the steel sheet member 1a is continuously in the cylindrical longitudinal direction. It can be assembled. In addition, the plurality of steel sheet members 1a to be assembled to form a cylindrical underground structure 100 all have a valley 12 and a hill 13 formed of a sari-shaped cross-sectional structure at the same constant pitch, and have the same through size. And while forming the fastening hole 15 in a batch, it should be produced with the same constant curvature.
상술한 바와같이 구성된 본 고안의 작용 및 효과를 설명하면 다음과 같다.Referring to the operation and effects of the present invention configured as described above are as follows.
즉, 본 고안의 제형강판(1)은 사다리형의 단면구조로 일정피치의 골(12)과 산(13)을 길게형성하고, 일정곡률로 휘어진 외형을 갖는 강판부재(1a)로 이루어지는바, 이러한 강판부재(1a)를 이용하여 대구경을 갖는 지중구조물(100)을 원통형으로 시공하고자 하는 경우, 먼저 이러한 강판부재(1a)의 선단일부와 또다른 강판부재(1a)의 후단일부를 상하구조로 겹치면, 사다리형의 단면구조를 갖는 산과 골이 서로 포개지면서 평평한 상부면에 천공된 체결공(15)이 일치되기 때문에, 일치되는 상기 체결공(15)으로 평보울트(14a)를 삽입한 다음, 평와셔(14b)와 평너트(14c)로서 상기 강판부재(1a)들을 일체로 연결조립할수 있는 것이다.That is, the formulation steel sheet 1 of the present invention is formed of a steel plate member (1a) having a long cross-sectional structure of the ladder-shaped pitch 12 and the peak 13, and has a curved shape with a constant curvature, When the underground structure 100 having a large diameter is to be constructed in a cylindrical shape by using the steel sheet member 1a, first, a front end portion of the steel sheet member 1a and a rear end portion of another steel sheet member 1a are formed in a vertical structure. When overlapping, since the fastening holes 15 coincided with the flat upper surface while the hill and valley having a ladder-shaped cross-sectional structure overlap each other, the flat bolt 14a is inserted into the matching fastening holes 15, and then, As the flat washer 14b and the flat nut 14c, the steel plate members 1a may be integrally connected and assembled.
이와 동시에, 원통 원주방향으로 가조립된 상기 강판부재(1a)의 일측과 또다른 강판부재(1a)의 일측단을 서로 겹치면, 겹쳐지는 산(13)부위에 형성된 체결공(15)이 서로 일치되기 때문에, 상기와 마찬가지로 일반구조용 체결부재(14)를 체결함으로서, 상기 강판부재(1a)을 원통 길이방향으로 연속조립하여 원통형의 지중구조물(100)을 시공할수 있는 것이다.At the same time, when one side of the steel sheet member 1a preliminarily assembled in the cylindrical circumferential direction and one side end of the other steel sheet member 1a overlap each other, the fastening holes 15 formed at the overlapping peaks 13 are coincident with each other. Thus, by fastening the general structural fastening member 14 as described above, the steel plate member (1a) can be continuously assembled in the cylindrical longitudinal direction to construct a cylindrical underground structure (100).
이러한 경우, 상기 체결부재(14)가 각각 조립되는 골(12),산(13)부위가 사다리형의 단면구조로 형성되어 평평한 상부면으로 구성되고, 이에 체결공(15)이 형성되어 체결부위가 모두 동일하기 때문에, 종래와 같이 체결부위의 형상이 서로 달라 종류가 서로 다른 고가의 체결부재(104)를 사용할필요없이, 저가의 한 종류 일반구조용 체결부재(14)를 모든 체결공(15)에 사용할수 있어 상기 체결부재(14)의 체결작업이 까다롭지 않고, 그 체결작업 또한 종래에 비하여 수월하게 수행할수 있는 한편 안정된 고정력으로 확고히 체결할수 있는 것이다.In this case, the valleys 12 and the mountains 13, to which the fastening members 14 are assembled, respectively, are formed in a ladder-shaped cross-sectional structure and constitute a flat top surface, and the fastening holes 15 are formed to fasten portions. Since all are the same, as in the prior art, the fastening member 104 is different from each other in the shape of the fastening part, and the fastening member 104 of one kind of general structure fastening member 14 is not required to use the fastening member 104. It can be used in the fastening of the fastening member 14 is not difficult, the fastening work can be performed easily compared to the conventional and can be firmly fastened with a stable holding force.
상술한 바와같이 본 고안에 의하면, 원통형의 지중구조물(100)을 구성하도록 원통 원주, 길이방향으로 연속적으로 조립되는 강판부재(1a)의 골(12)과 산(13)의 단면구조를 사다리형으로 갖춤으로서, 지중구조물(100)의 시공시 일반적으로 사용되는 저가의 일반구조용 체결부재(14)를 사용하여 조립할수 있기 때문에, 지중구조물(100)의 제작단가를 종래에 비하여 현저히 낮출수 있고, 시공시 작업자들이 일괄적으로 동일한 종류의 체결부재(14)를 별도의 선별작업없이 그대로 사용하여 조립작업을 수행할수있어 지중구조물(100)의 시공성을 보다 향상시킬수 있는 실용상의 효과가 얻어진다.As described above, according to the present invention, the cross-sectional structure of the valleys 12 and the peaks 13 of the steel plate member 1a continuously assembled in the cylindrical circumference and the longitudinal direction so as to constitute the cylindrical underground structure 100 is a ladder type. In addition, since it can be assembled using a low-cost general structural fastening member 14 generally used in the construction of the underground structure 100, the manufacturing cost of the underground structure 100 can be significantly lower than in the prior art, During construction, workers can use the same type of fastening members 14 as they are without any separate sorting operation to perform assembly work, thereby obtaining a practical effect of improving the workability of the underground structure 100.
Claims (1)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019970039881U KR200166983Y1 (en) | 1997-12-23 | 1997-12-23 | Trapezoidal corrugated steel plate for soil-steel bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019970039881U KR200166983Y1 (en) | 1997-12-23 | 1997-12-23 | Trapezoidal corrugated steel plate for soil-steel bridge |
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| Publication Number | Publication Date |
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| KR19990027292U true KR19990027292U (en) | 1999-07-15 |
| KR200166983Y1 KR200166983Y1 (en) | 2000-01-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030001137A (en) * | 2001-06-28 | 2003-01-06 | 평산에스아이 주식회사 | Corrugated matter pipe sanitary sewer |
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1997
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030001137A (en) * | 2001-06-28 | 2003-01-06 | 평산에스아이 주식회사 | Corrugated matter pipe sanitary sewer |
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