KR20030053635A - Tunnel Lining Structure System using Thin Steel Plate welded Curved T-shape Rolled Beam and Construction Method thereof - Google Patents
Tunnel Lining Structure System using Thin Steel Plate welded Curved T-shape Rolled Beam and Construction Method thereof Download PDFInfo
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- KR20030053635A KR20030053635A KR1020010083581A KR20010083581A KR20030053635A KR 20030053635 A KR20030053635 A KR 20030053635A KR 1020010083581 A KR1020010083581 A KR 1020010083581A KR 20010083581 A KR20010083581 A KR 20010083581A KR 20030053635 A KR20030053635 A KR 20030053635A
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- 238000010276 construction Methods 0.000 title claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 100
- 239000010959 steel Substances 0.000 claims abstract description 100
- 239000004567 concrete Substances 0.000 claims abstract description 30
- 239000011378 shotcrete Substances 0.000 claims abstract description 20
- 238000005304 joining Methods 0.000 claims abstract description 3
- 239000011435 rock Substances 0.000 claims description 21
- 230000005641 tunneling Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Classifications
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- 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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
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- 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
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Description
본 발명은 굴착된 터널의 기초암반 내벽을 마감처리하는 터널라이닝 구조체에 관한 것이며, 특히, 곡률을 갖는 T-형강이 접합된 박강판을 이용하여 터널라이닝을 구현한 터널라이닝 구조체에 관한 것이다. 또한, 본 발명은 곡률을 갖는 T-형강이 접합된 박강판을 이용하여 터널을 라이닝하는 방법에 관한 것이기도 하다.The present invention relates to a tunnel lining structure for finishing the inner wall of the foundation rock of an excavated tunnel, and more particularly, to a tunnel lining structure implementing tunnel lining by using a thin steel plate bonded with T-shaped steel having curvature. The present invention also relates to a method of lining a tunnel using a thin steel plate bonded to a T-beam having curvature.
국토의 약 70%가 산지로 이루어진 국내의 지형특성상 고속도로, 국도, 철도 그리고 도심지 내의 도로건설에 있어 터널의 건설은 필수적이며, 많은 수의 터널이 시공되어 왔고 앞으로도 터널시공은 꾸준히 이어질 전망이다. 따라서, 초기 건설비용뿐만 아니라 향후 예상되는 유지관리비용을 포함하는 생애주기비용(Life Cycle Cost)의 관점에 기초하여 경제적이고 시공성이 뛰어나며, 구조적 안전성을 보장하는 터널 시공방법의 개발은 기술적·경제적 파급효과가 상당히 크며, 건설 기술자들이 시급하게 해결해야 될 당면 과제이다.The construction of highways, national highways, railways and roads in urban areas is essential for the construction of highways, national roads, railways, and urban roads, with about 70% of the country's topography. Many tunnels have been constructed, and tunnel construction is expected to continue. Therefore, the development of a tunnel construction method that is economical and excellent in construction and guarantees structural safety based on not only the initial construction cost but also the life cycle cost that includes the expected maintenance cost in the future has a technical and economic ripple effect. The effect is quite significant and is an immediate challenge for construction engineers.
현재 국내에서 일반적으로 사용되는 현장타설식 철근콘크리트를 이용한 터널시공방법은 상대적인 대단면 굴착으로 터널의 단면방향뿐만 아니라 터널의 길이방향으로 지반이완범위가 확대되는 문제점이 있다. 또한, 지반이완범위의 확대로 인해 지지대를 장기간 사용하여야 하며, 비벼넣기식 타설공법으로 인해 굴착면에서의 초기변위가 과다 발생하는 구조적 단점이 있다. 또한, 다단계 및 복합공정에 기인한 공기지연 및 품질관리의 곤란성과 같은 시공상의 비효율성, 그리고 시공 및 사용 중에 발생하는 콘크리트의 균열로 인해 미관이 불량하고, 콘크리트의 백화, 박리 등 장기 열화로 의한 하자시에 보수보강이 곤란하다는 단점이 있다.Currently, the tunnel construction method using the site-pouring reinforced concrete that is generally used in Korea has a problem that the ground relaxation range is extended not only in the cross-sectional direction of the tunnel but also in the longitudinal direction of the tunnel due to the relatively large section excavation. In addition, the support should be used for a long time due to the expansion of the ground loosening range, and there is a structural disadvantage that excessive initial displacement occurs in the excavation surface due to the pouring method. In addition, aesthetics are poor due to inefficiency in construction such as air delay due to multi-stage and complex processes and difficulty in quality control, and cracking of concrete during construction and use, resulting from long-term deterioration such as whitening and peeling of concrete. There is a disadvantage that reinforcement is difficult in case of defects.
따라서, 구조적으로 우수하며 뛰어난 시공성과 유지관리의 편리성을 보장하는 강판을 이용한 터널시공방법에 대한 요구와 연구의 필요성이 산·학 및 연구계에서 제기되어 왔으며, 그에 따른 활발한 연구가 진행되고 있다. 이러한 필요성을 충족하기 위한 하나의 대안으로 본 발명이 제안된 것이다.Therefore, the necessity and research necessity of tunnel construction method using steel sheet which is structurally excellent and guarantees excellent construction and convenience of maintenance have been raised in industry, academia and research, and active research is being conducted accordingly. One alternative for meeting this need is the present invention.
본 발명은 앞서 설명한 바와 같은 종래의 현장타설식 철근콘크리트를 이용한 터널시공방법의 문제점을 해결하기 위한 것으로서, 곡률을 갖는 T-형강이 접합된 박강판과 뒤채움 콘크리트와의 일체화를 통해 터널의 안전성을 확보함과 동시에 무근형 콘크리트층의 두께감소를 통해 구조적으로 안전하고 경제적인 터널라이닝 구조체 및 그 시공방법을 제공하는 데 그 목적이 있다.The present invention is to solve the problems of the tunnel construction method using the conventional cast-in-place reinforced concrete as described above, the safety of the tunnel through the integration of the thin plate and the backfill concrete bonded to the T-beam with curvature The purpose of the present invention is to provide a structurally safe and economical tunnel lining structure and its construction method through securing the thickness and reducing the thickness of the plain concrete layer.
도 1은 본 발명의 한 실시예에 따른 곡률을 갖는 T-형강이 접합된 박강판을 이용한 터널라이닝 구조체의 횡단면도이고,1 is a cross-sectional view of a tunnel lining structure using a thin steel plate bonded to the T-shaped steel having a curvature according to an embodiment of the present invention,
도 2는 도 1에 도시된 구조체의 A부분을 확대한 확대도이다.2 is an enlarged view illustrating an enlarged portion A of the structure illustrated in FIG. 1.
♠ 도면의 주요부분에 대한 부호의 설명 ♠♠ Explanation of symbols on the main parts of the drawing ♠
10 : 터널라이닝 구조체 11 : 박강판10 tunneling structure 11 steel sheet
12 : 곡률을 갖는 T-형강 13 : 기초암반12: T-beam having curvature 13: Base rock
14 : 쇼트크리트층 15 : 엔드 플레이트14: shotcrete layer 15: end plate
16 : 뒤채움 무근형 콘크리트층16: backfilling plain concrete layer
상기 목적을 달성하기 위한 본 발명의 터널라이닝 구조체는, 기초암반의 표면에 타설되어 형성되는 쇼트크리트층과, 터널의 곡률에 맞도록 형성된 볼록면에 상기 볼록면의 곡률방향을 따라 동일곡률을 갖는 T-형강이 다수개 고정된 곡면강판을 상기 T-형강이 상기 쇼트크리트층을 향한 상태로 서로 겹쳐지게 배열하면서 서로 겹쳐지는 상기 곡면강판의 T-형강 끼리를 엔드 플레이트를 사용하여 서로 접합하여 터널의 내벽을 구성하는 내벽형성수단 및, 상기 내벽형성수단과 상기 쇼트크리트층의 사이에 뒤채움되는 무근형 콘크리트층을 포함하는 것을 특징으로 한다.Tunnel lining structure of the present invention for achieving the above object, the shotcrete layer formed by pouring on the surface of the base rock and the convex surface formed to match the curvature of the tunnel has the same curvature along the curvature direction of the convex surface The T-shaped steels of the curved steel sheets overlapping each other are arranged by overlapping each other with the T-shaped steels arranged so that the T-shaped steels are overlapped with each other in the state facing the short concrete layer. An inner wall forming means constituting the inner wall of the, and characterized in that it comprises a frameless concrete layer backfilled between the inner wall forming means and the shotcrete layer.
또한, 본 발명의 터널라이닝 시공방법은, 기초암반의 표면에 쇼트크리트를 타설하여 쇼트크리트층을 형성하는 단계와, 터널의 곡률에 맞도록 형성된 볼록면에 상기 볼록면의 곡률방향을 따라 동일곡률을 갖는 T-형강이 다수개 고정된 곡면강판을 상기 T-형강이 상기 쇼트크리트층을 향한 상태로 서로 겹쳐지게 배열하면서 서로 겹쳐지는 상기 곡면강판의 T-형강 끼리를 엔드 플레이트를 사용하여 서로 접합하여 터널의 내벽을 구성하는 단계와, 상기 다수의 곡면강판과 상기 쇼트크리트층의 사이에 무근형 콘크리트를 채워 콘크리트층을 형성하는 단계 및, 상기 터널의 바닥면을 형성하는 인버트 형성 후에 서로 겹쳐지는 상기 곡면강판을 서로 용접접합하는 단계를 포함하는 것을 특징으로 한다.In addition, the tunnel lining construction method of the present invention comprises the steps of forming a shotcrete on the surface of the foundation rock by forming a shotcrete layer, the same curvature along the curvature direction of the convex surface on the convex surface formed to match the curvature of the tunnel Joining the T-shaped steels of the curved steel sheets overlapped with each other by arranging the curved steel plates having a plurality of T-shaped steels fixed to each other with the T-shaped steels facing the shotcrete layer using an end plate. Forming an inner wall of the tunnel, filling a non-concrete-shaped concrete between the plurality of curved steel sheets and the shotcrete layer, and forming a concrete layer, and overlapping each other after forming an invert forming the bottom surface of the tunnel. And welding the curved steel sheets to each other.
아래에서, 본 발명에 따른 곡률을 갖는 T-형강이 접합된 박강판을 이용한 터널라이닝 구조체 및 그 시공방법의 양호한 실시예를 첨부한 도면을 참조로 하여 상세히 설명하겠다.In the following, with reference to the accompanying drawings, a preferred embodiment of the tunneling structure and its construction method using a thin steel plate bonded to the T-beam having a curvature according to the present invention will be described in detail.
도 1은 본 발명의 한 실시예에 따른 곡률을 갖는 T-형강이 접합된 박강판을 이용한 터널라이닝 구조체의 횡단면도이고, 도 2는 도 1에 도시된 구조체의 A부분을 확대한 확대도이다. 도 1 및 도 2에 도시된 바와 같이, 본 발명의 터널라이닝 구조체(10)는 곡률을 갖는 T-형강(12)이 접합된 다수의 박강판(11 ; 곡면강판)과, 기초암반(13)에 직접 타설되는 쇼트크리트(short crete)층(14)과, 박강판(11)에 각각 접합된 T-형강(12) 끼리를 서로 접합하는데 사용되는 다수의 엔드 플레이트(15 ; end plate) 및, 박강판(11)과 쇼트크리트층(14)의 사이에 뒤채움되는 무근형 콘크리트층(16)으로 구현된다.1 is a cross-sectional view of a tunnel lining structure using a thin steel plate bonded to the T-beam having a curvature according to an embodiment of the present invention, Figure 2 is an enlarged view of a portion A of the structure shown in FIG. As shown in Figs. 1 and 2, the tunnel lining structure 10 of the present invention includes a plurality of thin steel plates 11 (curved steel plates) to which a T-shaped steel 12 having curvature is joined, and a base rock 13 A plurality of end plates 15 used to bond the short crete layer 14 directly poured onto the T-beams 12 bonded to the thin steel plate 11 to each other, and It is implemented as a flat concrete layer 16 backfilled between the thin steel plate 11 and the shotcrete layer 14.
상기 쇼트크리트층(14)은 기초암반의 표면에 타설되어 형성되는 것으로서, 주로 기초암반(13)의 안정화를 위하여 시공되는데, 암반수의 침투에 의한 알칼리성 부식의 1차적 보호막의 역할을 기대할 수 있다.The shotcrete layer 14 is formed by pouring on the surface of the foundation rock, and is mainly constructed for stabilization of the foundation rock 13, and may serve as a primary protective film of alkaline corrosion by penetration of the rock water.
그리고, 박강판(11)은 터널의 곡면에 맞도록 형성된 곡면강판으로서, 그 볼록면에 곡률을 갖는 T-형강(12)이 용접접합되어 있다. 이 때, 곡률을 갖는 T-형강(12)은 그 웨브의 끝단이 박강판(11)의 볼록면의 곡률방향으로 용접접합된다. 즉, 곡률을 갖는 T-형강(12)은 박강판(11)의 볼록면에 수직상방 상태로 곡률방향으로 고정된다. 또한, T-형강(12)은 박강판(11)의 볼록면의 길이방향을 따라 일정 간격을 두고 상기 볼록면에 다수개 고정된다. 이렇게 구성된 다수의 박강판(11)을 T-형강(12)의 플랜지가 쇼트크리트층(14)을 향한 상태로 서로 겹쳐지게 배열하면서, 서로 겹쳐지는 박강판(11)의 T-형강(12) 끼리를 엔드 플레이트(15)를 사용하여 서로 용접접합하여 터널의 내벽을 구성하게 된다.The thin steel plate 11 is a curved steel plate formed to fit the curved surface of the tunnel, and a T-shaped steel 12 having a curvature is welded to the convex surface. At this time, the T-shaped steel 12 having the curvature is welded in the curvature direction of the convex surface of the thin steel plate 11 at the end of the web. That is, the T-shaped steel 12 having the curvature is fixed in the curvature direction in a state perpendicular to the convex surface of the thin steel plate 11. In addition, a plurality of T-shaped steels 12 are fixed to the convex surface at regular intervals along the longitudinal direction of the convex surface of the thin steel plate 11. The T-shaped steels 12 of the thin steel plates 11 overlapping each other while arranging the plurality of thin steel plates 11 configured as above so as to overlap each other with the flanges of the T-shaped steels 12 facing the shotcrete layer 14. The end plates 15 are welded to each other to form an inner wall of the tunnel.
이렇게 곡면을 갖는 박강판(11)을 사용할 경우에는 기존의 현장타설식 콘크리트 시공공법에서 요구되는 내측 곡면판을 필요로 하지 않으므로, 추가적인 곡면판의 제작이 필요치 않다.When using the thin steel sheet 11 having a curved surface does not require the inner curved plate required by the existing cast-in-place concrete construction method, the production of additional curved plate is not necessary.
또한, 본 발명은 터널과 동일한 곡률을 갖는 T-형강이 접합된 박강판(11)과 무근형 콘크리트층(16)이 하중에 대한 주 저항부재로 사용되는데, 박강판(11)과 T-형강(12)의 강도증대로 인해 터널의 하중에 대한 안전성을 확보함과 동시에 뒤채움 무근형 콘크리트층(16)의 두께를 30% 가량 감소시킬 수 있다.In addition, according to the present invention, the thin plate 11 and the non-concrete-type concrete layer 16, to which the T-shaped steel is bonded, having the same curvature as the tunnel, are used as the main resistance member against the load, and the thin plate 11 and the T-shaped steel are used. Due to the increase in the strength of (12), while ensuring the safety of the load of the tunnel, the thickness of the backfill-free concrete layer 16 can be reduced by about 30%.
또한, 본 발명은 T-형강(12)이 박강판(11)에 용접접합됨에 따른 일체화된 구조체를 구성할 수 있을 뿐만 아니라, T-형강(12)의 넓은 접합면적으로 인해 콘크리트의 부착성능이 향상된다. 또한, 본 발명은 서로 겹쳐지는 박강판(11)의 T-형강(12) 끼리를 엔드 플레이트(15)를 통해 서로 용접접합하고, 서로 겹쳐진 박강판(11)을 용접접합하기 때문에, 접합강도가 크게 향상된다.In addition, the present invention can not only construct an integrated structure as the T-shaped steel 12 is welded to the thin steel plate 11, but also the adhesion performance of the concrete due to the large bonding area of the T-shaped steel 12 Is improved. In addition, in the present invention, the T-shaped steels 12 of the thin steel plates 11 overlapping each other are welded to each other through the end plate 15, and the weld strengths of the overlapped thin steel plates 11 are welded together. Greatly improved.
그리고, 본 발명의 박강판(11)은 초기에 지지대(거푸집)로 이용되어 지반이완을 최소화할 수 있어 구조적인 안전성을 확보함과 아울러 암반의 붕락으로 인한안전사고를 미연에 예방하며, 작업환경을 획기적으로 개선하는 역할을 한다.In addition, the thin steel plate 11 of the present invention can be used as a support (form) at the beginning to minimize ground relaxation, thereby ensuring structural safety and preventing safety accidents due to rock collapse. It is to improve the groundbreaking.
또한, 박강판(11)을 이용할 경우에는 용접접합 또는 볼트 고정 등을 통해 박강판(11)을 서로 결합 또는 실링(sealing)처리함으로써 암반수의 누수를 쉽게 차단할 수 있으며, 암반수의 누수시에는 터널 내측의 박강판(11)에서 쉽게 누수의 위치를 확인할 수 있다. 또한, 암반수의 누수가 발생할 경우에는 누수 부위에 플레이트를 배치한 후 용접함으로써 쉽게 복구할 수 있어 고비용의 그라우팅 작업이 필요하지 않다. 또한, 기초암반의 돌출부나 기타 지지대가 많지 않으므로 갱내 작업자들의 작업안전성이 개선된다.In addition, in the case of using the thin steel plate 11, by welding or bolting the thin steel plate 11 to each other by bonding or sealing (sealing) can easily block the leakage of the rock water, when the rock water leakage inside the tunnel You can easily check the location of the leak in the thin steel plate (11). In addition, when leakage of rock water occurs, the plate may be easily repaired by placing the plate at the site of leakage and no expensive grouting is required. In addition, since there are not many protrusions or other supports of the foundation rock, the work safety of the workers in the pit is improved.
상기 박강판(11)과 쇼트크리트층(14)의 사이에 뒤채움되는 무근형 콘크리트층(16)은 주로 정역학적 기능을 수행하며 요구되는 설계저항을 제공하는 역할을 한다. 즉, 무근형 콘크리트층(16)은 터널의 구조 특성에 기인하여 주로 압축력의 부하를 받는다.The plain concrete layer 16 backfilled between the thin steel plate 11 and the shotcrete layer 14 mainly performs a static function and serves to provide a required design resistance. That is, the plain concrete layer 16 is mainly subjected to a compressive load due to the structural characteristics of the tunnel.
본 발명은 상기와 같은 특징을 갖는 T-형강(12)이 접합된 박강판(11)과 뒤채움 무근형 콘크리트층(16)과의 일체화를 통해 상호작용 및 강도보강 효과를 증대시킬 수 있으므로, 무근형 콘크리트층(16)의 두께감소를 통해 구조적으로 안전하고 경제적인 구조체를 구현할 수 있다.Since the present invention can increase the interaction and strength reinforcing effect through the integration of the thin steel plate 11 to which the T-shaped steel 12 having the above characteristics is bonded and the back-filled concrete layer 16, By reducing the thickness of the concreteless concrete layer 16 it is possible to implement a structurally safe and economical structure.
아래에서는, 상기와 같이 구성된 터널라이닝 구조체(10)를 형성하는 시공순서에 대해 상세히 설명하겠다.Hereinafter, the construction procedure for forming the tunnel lining structure 10 configured as described above will be described in detail.
먼저, 공장에서 터널의 곡률에 맞도록 곡면을 갖는 박강판(11)을 설계치수별로 제작한 다음, 뒤채움 무근형 콘크리트층(16)과의 부착성을 향상시키고 하중에대한 주 저항부재로 사용될 수 있도록 박강판(11)의 볼록면에 곡률을 갖는 T-형강(12)을 용접접합한다. 이 때, T-형강(12)은 그 웨브의 끝단을 박강판(11)의 볼록면의 곡률방향을 따라 용접접합한다. 그리고, 터널의 기초암반(13)의 표면에 쇼트크리트를 타설하여 쇼트크리트층(14)을 형성하여 기초암반(13)을 안정화시킨다.First, a thin steel plate 11 having a curved surface to fit the curvature of a tunnel in a factory is manufactured by design dimensions, and then it is used as a main resistance member against load and improves the adhesion with the backfill-free concrete layer 16. The T-shaped steel 12 having a curvature is welded to the convex surface of the thin steel plate 11 so as to be welded. At this time, the T-shaped steel 12 welds the end of the web along the curvature direction of the convex surface of the thin steel plate 11. Then, shotcrete is placed on the surface of the foundation rock 13 of the tunnel to form the shotcrete layer 14 to stabilize the foundation rock 13.
그런 다음, 지지구조물을 이용해 미리 제작된 다수의 박강판(11)을 T-형강(12)의 플랜지가 쇼트크리트층(14)을 향한 상태로 서로 겹쳐지게 배열하면서, 서로 겹쳐지는 박강판(11)의 T-형강(12) 끼리를 엔드 플레이트(15)를 사용하여 서로 용접접합하고, 겹쳐진 박강판(11) 끼리를 볼트 고정함으로써 터널의 내벽을 구성한다. 그리고, 박강판(11)과 쇼트크리트층(14)의 사이를 뒤채움 무근형 콘크리트로 채워 콘크리트층(16)을 형성함으로써 터널라이닝 구조체(10)를 완성한다. 이 때, 박강판(11)들간의 용접작업은 터널을 바닥면을 형성하는 인버트 형성 후에 수행하여 터널의 시공을 완료한다.Then, a plurality of thin plates 11 made in advance using the supporting structure are arranged to overlap each other with the flanges of the T-shaped steel 12 facing the shotcrete layer 14, while overlapping the thin plates 11. The inner walls of the tunnel are constituted by welding the T-shaped steels 12 of) to each other using the end plate 15 and bolting the overlapping thin steel plates 11 to each other. Then, the tunnel lining structure 10 is completed by filling the gap between the thin steel plate 11 and the shotcrete layer 14 with backfill-free concrete to form the concrete layer 16. At this time, the welding operation between the thin steel plates 11 is performed after the invert formation to form the bottom surface to complete the construction of the tunnel.
앞서 상세히 설명한 바와 같이 본 발명의 곡률을 갖는 T-형강이 접합된 박강판을 이용한 터널라이닝 시공방법은 박강판을 초기에 지지대(거푸집)로 이용하여 지반이완을 최소화함으로써 구조적인 안전성을 확보함과 아울러 암반의 붕락으로 인한 안전사고를 미연에 예방하며, 작업환경을 획기적으로 개선하는 효과가 있다.As described in detail above, the tunnel lining construction method using the thin steel plate bonded to the T-shaped steel having the curvature of the present invention ensures structural safety by minimizing the ground relaxation by using the steel sheet as a support (form) at the beginning. In addition, it prevents safety accidents due to the collapse of the rock, and has an effect of dramatically improving the working environment.
또한, 본 발명의 터널라이닝 시공방법은 터널과 동일한 곡률을 갖는 T-형강이 용접접합된 박강판을 공장 제작함에 따른 신속한 시공성 및 고품질의 균등한 터널건설이 용이하고, T-형강이 접합된 박강판과 뒤채움 무근형 콘크리트층과의 일체화를 통해 상호작용 및 강도보강 효과를 증대시킬 수 있으며, 주 하중의 상당부분을 T-형강이 분담함으로써 무근형 콘크리트층의 두께감소를 통해 구조적으로 안전하고 경제적인 구조체를 구현할 수 있다.In addition, the tunnel lining construction method of the present invention is easy to construct a tunnel construction of high-quality and high-quality uniformity of the T-shaped steel welded thin steel sheet having the same curvature as that of the tunnel, and to the T-shaped steel bonded foil By integrating the steel plate with the backfilled concrete layer, the interaction and strength reinforcement effect can be increased.T-shaped steel shares a significant part of the main load, and structurally safe and secured by reducing the thickness of the plain concrete layer. Economic structure can be implemented.
또한, 본 발명의 터널라이닝 구조체는 박강판을 서로 용접접합함으로써 암반수의 침투에 대한 터널의 수밀성이 상당히 향상되며, 누수의 탐지와 복구가 매우 간단하여 유지관리 및 보수의 편리성으로 인해, 생애주기비용(Life Cycle Cost) 측면에서 기존의 현장타설식 콘크리트 시공방법으로 구현된 구조체에 비하여 상당한 경제성을 확보할 수 있다.In addition, the tunnel lining structure of the present invention significantly improves the watertightness of the tunnel against the infiltration of rock water by welding the steel sheets to each other, and is very simple in detecting and repairing leaks, resulting in the convenience of maintenance and repair. In terms of cost (Life Cycle Cost), significant economics can be secured compared to the structure implemented by the existing cast-in-place concrete construction method.
이상에서 본 발명의 곡률을 갖는 T-형강이 접합된 박강판을 이용한 터널라이닝 구조체 및 그 시공방법에 대한 기술사항을 첨부도면과 함께 서술하였지만 이는 본 발명의 가장 양호한 실시예를 예시적으로 설명한 것이지 본 발명을 한정하는 것은 아니다.In the above description, the technical details of the tunneling structure and the construction method using the thin steel plate bonded to the T-beam having the curvature of the present invention have been described with the accompanying drawings, which are illustrative examples of the best embodiments of the present invention. It does not limit the invention.
또한, 이 기술분야의 통상의 지식을 가진 자이면 누구나 본 발명의 기술사상의 범주를 이탈하지 않는 범위내에서 다양한 변형 및 모방이 가능함은 명백한 사실이다.In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.
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