KR20070095481A - Semi open cut type tunnel construction method at low overburden and arch type structure for tunnel construction - Google Patents

Semi open cut type tunnel construction method at low overburden and arch type structure for tunnel construction Download PDF

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KR20070095481A
KR20070095481A KR1020050079922A KR20050079922A KR20070095481A KR 20070095481 A KR20070095481 A KR 20070095481A KR 1020050079922 A KR1020050079922 A KR 1020050079922A KR 20050079922 A KR20050079922 A KR 20050079922A KR 20070095481 A KR20070095481 A KR 20070095481A
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South Korea
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tunnel
tunnel construction
ground
beams
semi
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KR1020050079922A
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Korean (ko)
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나상민
이성진
이상덕
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지에스건설 주식회사
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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
    • E02D29/05—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 at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
    • E02D29/055—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 at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench further excavation of the cross-section proceeding underneath an already installed part of the structure, e.g. the roof of a tunnel
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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

Abstract

A semi-open cut type tunnel construction method at low overburden and an arch-shaped structure for tunnel construction are provided to shorten the construction period and reduce the construction cost by excavating a tunnel by using an excavation construction method suitable for the lower ground of the arch-shaped structure against vibration. A semi-open cut type tunnel construction method comprises the steps of forming the bottom surface of cut ground by cutting the original ground by a predetermined depth. A previously manufactured arch-shaped structure is installed at the bottom surface of the cut ground. A refilling layer is formed by refilling soil in the upper portion of the arch-shaped structure. A tunnel is formed by excavating the ground below the arch-shaped structure.

Description

저토피구간의 반개착식 터널시공방법 및 터널시공용 아치형 구조물{Semi open cut type tunnel construction method at low overburden and arch type structure for tunnel construction}Semi open cut type tunnel construction method at low overburden and arch type structure for tunnel construction}

도 1은 터널이 설치되는 구간의 지형을 나타낸 도면.1 is a view showing the topography of the section in which the tunnel is installed.

도 2는 종래기술에 따른 개착식 공법에 의한 시공단면도.Figure 2 is a cross-sectional view of the construction by the detachable method according to the prior art.

도 3a 내지 3d는 본 발명에 따른 터널시공방법에 의해 터널을 시공하는 과정을 보인 공정도.3a to 3d is a process diagram showing a process for constructing a tunnel by the tunnel construction method according to the present invention.

도 4는 도 3b 및 3d에 도시된 아치형 구조물의 사시도.4 is a perspective view of the arched structure shown in FIGS. 3b and 3d.

<도면의 주요부호에 대한 설명><Description of Major Symbols in Drawing>

10 : 원지반 20 : 절토바닥면10: base 20: cut bottom surface

30 : 아치형 구조물 31 : 아치형 H빔30: arch structure 31: arch H beam

32 : 토류판 33 : 기초부32: earth plate 33: foundation

40 : 되매움층 50 : 터널40: back layer 50: tunnel

본 발명은 도심지나 터널 갱구부, 산악지형의 계곡 등과 같이 토피가 얇은 지형에서 터널을 시공하는 방법 및 터널시공용 아치형 구조물에 관한 것으로, 더욱 상세하게는 터널의 천단아치에 해당되는 지점까지만 굴착하고 절토바닥면에 아치형 구조물을 설치하여 복토한 후 터널을 굴착하는 저토피구간의 반개착식 터널시공방법 및 터널시공용 아치형 구조물에 관한 것이다.The present invention relates to a method for constructing a tunnel in a toffee thin terrain, such as a downtown area, a tunnel shaft portion, a valley of a mountainous terrain, and an arched structure for tunnel construction, and more specifically, to excavate only to the point corresponding to the heavenly arch of the tunnel. The present invention relates to a semi-separable tunnel construction method and an arch structure for tunnel construction by installing an arch structure on the bottom surface of a cut and then excavating a tunnel.

통상적으로 터널의 굴착공법으로는 폭약발파에 의한 굴착공법 또는 TBM 등의 기계식 굴착장비를 이용한 굴착공법 등으로 대별되며, 이와 같은 공법을 통하여 점차적으로 터널의 심도깊이를 증가시켜가면서 터널을 구축하게 된다.In general, the excavation method of the tunnel is roughly divided into excavation method by explosive blasting or excavation method using mechanical excavation equipment such as TBM, and through such a method to build a tunnel while gradually increasing the depth depth of the tunnel .

이와 같은 통상의 굴착공법으로 터널을 굴착하기 위해서는 터널상부의 토피층이 어느 정도 두께이상이 되어야만 아칭효과를 통한 지지력이 확보되어 붕괴되지 않고 터널을 건설할 수 있다.In order to excavate a tunnel by such a conventional excavation method, the toffee layer on the upper part of the tunnel must be a certain thickness or more to secure the support force through the arching effect, so that the tunnel can be constructed without collapse.

그러나 도 1에 도시된 것처럼 지형조건상 터널의 입출구(A)나 계곡부(B)와 같이 토피가 얇은 구간의 경우에는 지반자체가 견고하지 못하기 때문에 전술한 통상의 굴착공법으로는 터널시공이 현실적으로 어려운 문제점이 있었다.However, as shown in FIG. 1, in the case of a thin toffee section such as the entrance and exit (A) and the valley portion (B) of the tunnel, the ground itself is not solid, so the tunnel construction is realistic with the above-described conventional excavation method. There was a difficult problem.

이에, 토피가 얇은 구간에서는 도 2에 도시된 바와 같이 터널의 각부에 해당하는 부분까지 굴착하고 터널구조물을 시공한 후 되메움을 하는 개착식공법을 통해 터널을 시공해왔다.Thus, in the thin topi section, as shown in FIG. 2, the tunnel has been constructed through an open-type method that excavates to a portion corresponding to each part of the tunnel and constructs the tunnel structure and then backfills it.

그러나, 전술한 바와 같은 공정을 통해 시공이 이루어지는 종래의 개착식공법의 경우, 지반의 두께가 두꺼운 곳에서 시공하게 되면 지반으로부터 큰 응력이 작용하기 때문에 지반을 받치는 라이닝콘크리트의 두께가 증가하게 되며, 그에 따라 라이닝콘크리트를 공장에서 미리 제작하여 운반 설치하는 것이 현실적으로 어렵 다. 따라서, 전술한 바와 같은 현장에서는 직접 거푸집 및 지지대를 가설한 후 콘크리트를 타설하고 양생해야 하기 때문에 품질관리가 어렵고 양생시간에 따른 전체 공사기간이 길어지는 문제점이 있다.However, in the conventional cladding method in which the construction is performed through the above-described process, when the construction of the ground is thick, the thickness of the lining concrete supporting the ground increases because a large stress acts on the ground. Therefore, it is practically difficult to manufacture and transport the lining concrete in advance in the factory. Therefore, in the site as described above, since the concrete must be poured and cured directly after laying the formwork and support, there is a problem that the quality control is difficult and the entire construction period according to the curing time is long.

그리고, 터널의 각부까지 굴착해야 하므로 양측에 대절토 사면이 형성되며, 절토량 또한 많아 환경적 피해가 크게 발생하는 문제점도 있다.And, because the excavation to each part of the tunnel is formed on both sides of the gravel slope, there is also a problem that the environmental damage occurs a lot of cut amount.

또한, 라이닝콘크리트가 완전히 양생되기 전에는 절토된 흙을 메울 수 없기 때문에 그 위로 차량통행이 불가능하여 지면에서 행해지는 다른 작업을 수행할 수 없게 되며, 다른 작업을 수행하기 위해서는 차량통행을 위한 별도의 임시통로를 만들어야 하는 문제점도 있다.In addition, the lining concrete cannot be filled until the lining concrete is fully cured, so it is impossible to pass the vehicle over it, and other work on the ground cannot be performed. There is also the problem of creating a passageway.

한편, 기존에 외국에서 시공된 사례가 있는 반개착식 터널 시공방법은 아치 슬래브(Arc Slab)부분을 콘크리트로 타설하기 위하여 천단 상부 굴착시 아치형태로 굴착해야 하는 어려움이 있을 뿐만 아니라, 취성의 종방향 연속구조로서 하부 굴착시 변위나 발파 등의 진동에 취약하여 적용대상의 토질에 제한이 있었으며, 곡면에의 콘크리트 타설 등의 시공에도 어려움이 있었다. 또한 이 공법에서도 개착식 공법의 문제점과 같이 전체구간의 콘크리트 아치 슬래브가 양생이 된 후에 복토와 후부 굴착이 이루어져야 하므로 공사 기간이 길어지는 문제점이 있다.On the other hand, the semi-adhesive tunnel construction method, which has been constructed in foreign countries, has the difficulty of excavating in the form of arch when excavating the upper part of the ceiling in order to cast the arch slab part into concrete. As the directional continuous structure, it was vulnerable to vibrations such as displacement and blasting during the excavation of the lower part, and there was a limitation in the soil quality of the target object. In addition, this method also has a problem in that the construction period is long because the cover and back excavation should be made after the concrete arch slab of the entire section is cured, as in the problem of the attachment method.

이에 본 발명은 전술한 바와 같은 종래의 제반 문제점을 해소하기 위하여 안출된 것으로, 과다한 사면절취와 별도의 보강없이 원지반을 터널의 천단아치에 해당하는 지점까지만 굴착함으로써 과다한 사면절취에 의한 환경파괴 및 사면안정문 제를 해결할 수 있는 저토피구간의 반개착식 터널시공방법 및 터널시공용 아치형 구조물을 제공하는데 그 목적이 있다.Accordingly, the present invention has been made to solve the conventional problems as described above, by excavating only the base to the point corresponding to the top end of the tunnel without excessive slope cutting and additional reinforcement and environmental destruction and slope due to excessive slope cutting The purpose of the present invention is to provide a semi-attached tunnel construction method and an arch structure for tunnel construction that can solve the stability problem.

또한, 공장에서 미리 제작된 아치형 H빔과 토류판 등으로 구성된 아치형 구조물을 설치함으로써 아치형 구조물이 하부 터널굴착에 의한 진동에 일체로 거동하지 않고 개별적으로 반응하여 진동에 강한 구조물을 형성할 수 있으며, 복토한 후 아치형 구조물 하부 지반에 적합한 굴착공법으로 터널을 굴착함으로써 공사기간을 단축시켜 비용을 절감할 수 있는 저토피구간의 반개착식 터널시공방법 및 터널시공용 아치형 구조물을 제공하는 목적도 있다. In addition, by installing an arch structure consisting of a pre-fabricated arched H beam and earth plate, the arched structure can be individually reacted to the vibration by the lower tunnel excavation to form a structure that is resistant to vibration. After the excavation of the tunnel by the excavation method suitable for the lower ground of the arch structure, there is also an object of providing a semi-open tunnel construction method of the low toffee section and the arch structure for the tunnel construction that can reduce the cost by reducing the construction period.

전술한 바와 같은 목적을 달성하기 위해 본 발명에 따른 저토피구간의 반개착 터널시공방법은, 원지반을 일정 깊이로 절토하여 절토바닥면을 형성하는 단계와, 절토바닥면에 미리 제작된 아치형 구조물을 설치하는 단계와, 아치형 구조물의 상부에 토사를 되메워 되메움층을 형성하는 단계, 및 아치형 구조물의 하부에 있는 지반을 굴착하여 터널 갱구를 형성하는 단계를 포함하여 이루어진 것에 기술적 특징이 있다.In order to achieve the object as described above, the semi-adhesive tunnel construction method according to the present invention comprises the steps of cutting the ground to a certain depth to form a cut bottom surface, and the pre-fabricated arched structure in the cut bottom surface There are technical features, including the steps of installing, backfilling the soil to the top of the arched structure to form a backfill layer, and excavating the ground in the lower portion of the arched structure to form a tunnel shaft.

전술한 터널시공방법에 있어서, 아치형 구조물은, 아치형으로 형성되어 절토바닥면에 이격 설치되는 복수 개의 아치형 H빔과, 아치형 H빔 사이에 조밀하게 끼워지는 복수 개의 토류판, 및 아치형 H빔의 양단부에 작용하는 하중을 지반에 전달할 수 있도록 된 기초부를 포함하여 이루어진다.In the above-described tunnel construction method, the arcuate structure has a plurality of arcuate H-beams formed in an arc shape and spaced apart from the cut bottom, a plurality of earth plates densely sandwiched between the arcuate H-beams, and both ends of the arcuate H-beams. It includes a foundation that is capable of transmitting an acting load to the ground.

전술한 바와 같은 목적을 달성하기 위해 본 발명에 따른 저토피구간의 반개 착 터널시공용 아치형 구조물은, 아치형으로 형성되며 절토된 절토바닥면에 이격 설치되는 복수 개의 아치형 H빔과, 아치형 H빔 사이에 조밀하게 끼워지는 복수 개의 토류판, 및 아치형 H빔의 양단부에 작용하는 하중을 지반에 전달할 수 있도록 된 기초부를 포함하여 이루어진다.In order to achieve the object as described above, the arch structure for the half-opening tunnel construction according to the present invention is formed between the plurality of arcuate H-beams and arcuate H-beams which are formed in an arc shape and are spaced apart from the cut ground surface. It includes a plurality of earth plate to be densely fitted to the base, and the base to be able to transmit the load acting on both ends of the arc-shaped H beam to the ground.

이하, 본 발명에 따른 저토피구간의 반개착 터널시공방법 및 터널시공용 아치형 구조물의 바람직한 실시예를 통하여 전술한 바와 같은 구성들의 특징과 그 작용을 보다 상세히 설명하기로 한다.Hereinafter, the characteristics of the above-described configurations and their functions will be described in more detail through the preferred embodiments of the semi-opened tunnel construction method and the arch structure for tunnel construction according to the present invention.

첨부된 도면의 도 3a 내지 3d는 본 발명에 따른 터널시공방법에 의해 터널을 시공하는 과정을 보인 공정도이고, 도 4는 도 3b 및 도 3d에 도시된 아치형 구조물의 사시도이다.3A to 3D of the accompanying drawings are process drawings showing a process of constructing a tunnel by the tunnel construction method according to the present invention, and FIG. 4 is a perspective view of the arch structure shown in FIGS. 3B and 3D.

도시된 바와 같이, 본 발명의 일 실시예에 따른 저토피구간의 터널은, 먼저 원지반(10)을 절토하여 절토바닥면(20)을 형성하는 절토바닥면 형성단계(S1)와, 절토바닥면(20)에 미리 제작된 아치형 구조물(30)을 설치하는 아치형 구조물 설치단계(S2)와, 아치형 구조물(30)의 상부에 토사를 메워 되메움층(40)을 형성하는 되메움단계(S3)와, 아치형 구조물(30)의 하부에 있는 지반을 굴착하여 터널(50)을 형성하는 터널 형성단계(S4)를 포함하여 시공된다.As shown, the tunnel between the low topi area according to an embodiment of the present invention, first cut the ground ground 10 to form the cut bottom surface 20 to form the cut bottom surface (S1), cut bottom surface Arched structure installation step (S2) to install the prefabricated arched structure 30 to the 20, and backfilling step (S3) to form a backfill layer 40 by filling the soil on the upper portion of the arched structure (30) And, it is constructed including a tunnel forming step (S4) to form a tunnel 50 by excavating the ground in the lower portion of the arcuate structure (30).

도 3a에 도시된 바와 같이, 전술한 절토바닥면 형성단계(S1)는 도심지나 산악지형의 계곡부와 같이 토피가 얇은 구간의 원지반(10)을 포크레인 등의 절토장비 를 이용해 절토하는 과정이다.As shown in Figure 3a, the above-described cut bottom surface forming step (S1) is a process of cutting the base plate 10 of the topi thin section, such as the valley portion of the urban area or mountainous terrain using cutting equipment such as a fork lane.

도 3b에 도시된 바와 같이, 전술한 아치형 구조물 설치단계(S2)는 절토바닥면(20)에 아치형 구조물(30)을 설치하는 과정이다.As shown in Figure 3b, the above-described arched structure installation step (S2) is a process of installing the arched structure 30 on the cut bottom surface (20).

이 단계에서 사용되는 아치형 구조물(30)은 도 4에 도시된 바와 같이, 아치형으로 된 복수 개의 아치형 H빔(31)과, 아치형 H빔(31) 사이에 조밀하게 끼워지는 복수 개의 토류판(32), 및 아치형 H빔(31)의 양단부를 지지하고 지반에 하중을 전달하는 기초부(33)로 구성된다.As shown in FIG. 4, the arcuate structure 30 used in this step includes a plurality of arcuate H-beams 31 that are arcuate and a plurality of earth plates 32 that are densely fitted between the arcuate H-beams 31. And a base portion 33 which supports both ends of the arc-shaped H beam 31 and transmits a load to the ground.

이 때, 기초부(33)는 철근콘크리트 기초로서 아치형 H빔(31)에 작용하는 하중을 지반에 전달하는 역할을 한다.At this time, the base portion 33 serves to transfer the load acting on the arc-shaped H beam 31 as the reinforced concrete foundation to the ground.

그리고, 토류판(32)들은 아치형 H빔(31)의 측부에 형성된 홈의 상하폭보다 그 두께가 작기 때문에, 아치형 H빔(31)들을 일정간격으로 설치한 후 아치형 H빔(31)들 사이의 홈에 끼우면 된다.And, since the earth plate 32 is smaller in thickness than the upper and lower widths of the grooves formed on the side of the arcuate H-beam 31, the arcuate H-beams 31 are provided at regular intervals therebetween the arcuate H-beams 31. Just insert it into the groove.

이러한 아치형 구조물(30)은 공장에서 미리 제작된 후 운반되어 작업현장에서 조립만 하면 된다.The arcuate structure 30 is manufactured in advance in the factory and then transported, it is only necessary to assemble in the workplace.

도 3c에 도시된 바와 같이, 전술한 되메움단계(S3)는 절토바닥면 형성단계(S1)에서 절토된 흙들을 아치형 구조물(30)의 상부에 다시 메워 되매움층(40)을 형성하는 과정이다.As shown in Figure 3c, the above backfill step (S3) is a process of forming the backfill layer 40 by filling the soil cut in the cut bottom surface forming step (S1) on top of the arcuate structure 30 again to be.

도 3d에 도시된 바와 같이, 전술한 터널 형성단계(S4)는 아치형 구조물(30)의 하부에 있는 지반을 지반상태에 적합한 굴착공법을 이용해 굴착하여 최종 터널(50)을 형성하는 과정이다.As shown in Figure 3d, the above-described tunnel forming step (S4) is a process of forming the final tunnel 50 by excavating the ground in the lower portion of the arcuate structure 30 using an excavation method suitable for the ground state.

이 때, 최종 터널(50)을 형성하는 과정에는 굴착공법을 이용해 갱구를 형성하는 과정과, 갱구의 내측면 및 바닥에 콘크리트 라이닝을 시공하는 과정 등이 포함된다.At this time, the process of forming the final tunnel 50 includes the process of forming the shaft using the excavation method, and the process of constructing concrete lining on the inner surface and the bottom of the shaft.

이상과 같이 본 발명의 바람직한 실시예에 따른 저토피구간의 반개착식 터널시공방법 및 터널시공용 아치형 구조물을 첨부된 도면을 참조로 설명하였으나, 본 발명은 본 명세서에 상세히 설명된 실시예와 도면에 한정되지 아니하며, 발명의 기술사상 범위 내에서 다양한 변형이 이루어질 수 있다. 이하, 다양하게 변형 실시될 수 있는 예들을 간단히 살펴보기로 한다.As described above with reference to the accompanying drawings, the semi-attached tunnel construction method and the arch structure for the tunnel construction between the low topi section according to a preferred embodiment of the present invention, the present invention is described in detail herein with the embodiments and drawings It is not limited to, various modifications can be made within the scope of the technical idea of the invention. Hereinafter, examples that can be variously modified will be briefly described.

첫 째, 본 발명의 실시예에서는 기초부가 독립된 독립기초 형태로 형성되어 아치형 H빔을 각각 지지하도록 이루어져 있으나, 지반조건에 따라 기초부가 서로 연결되는 일체형의 줄기초 형태로 형성될 수도 있다.First, in the embodiment of the present invention, but the base is formed in an independent base form to support each of the arched H-beams, it may be formed in the form of an integral stem that is connected to each other depending on the ground conditions.

둘 째, 절토바닥면의 지반이 약한 경우에는 기초부를 설치하기 전에 보강부재를 박고 그 위에 기초부를 설치할 수도 있다. 이 때, 보강부재는 사선방향으로 박음으로써, 상부에 지지되는 아치형 구조물을 견고하게 지지할 수 있다. 즉, 상부에 지지되는 아치형 구조물의 응력이 수직으로 작용하지 않고 사선방향으로 경사지게 작용하기 때문에 이에 효과적으로 대응할 수 있다. 이러한 보강부재의 경사각은 수직에 대하여 20~28°범위 이내가 가장 바람직하다. 만일, 보강부재의 경사각이 20°미만이거나 28°를 초과할 경우에는 아치형 구조물의 응력방향과 달라져 아치형 구조물을 견고하게 지지할 수 없다.Second, if the ground of the cut bottom is weak, the reinforcing member may be put before installing the foundation and the foundation may be installed thereon. At this time, the reinforcing member can be firmly supported by the arcuate structure that is supported on the upper portion by the oblique direction. That is, since the stress of the arcuate structure supported on the upper side does not act vertically but obliquely in an oblique direction, it can effectively cope with this. The inclination angle of the reinforcing member is most preferably within the range of 20 ~ 28 ° with respect to the vertical. If the angle of inclination of the reinforcing member is less than 20 ° or exceeds 28 °, the arcuate structure cannot be firmly supported because it is different from the stress direction of the arcuate structure.

셋 째, 아치형 구조물의 설치한 후에 하부 굴착으로 인한 아치형 H빔의 부등침하에 의한 아치형 구조물의 손상을 방지하기 위하여 H빔들을 별도의 연결부재를 이용해 연결할 수도 있다. 이 때, 연결부재들은 용접에 의해 H빔에 결합되거나 볼트 및 너트 등의 체결수단에 의해 결합될 수 있다. 또한, 연결부재들은 일자형 또는 십자형 등 다양한 형태로 형성되는 것이 가능하다. Third, the H beams may be connected by using a separate connecting member in order to prevent damage to the arch structure due to the uneven settlement of the arch H beam due to the lower excavation after the installation of the arch structure. At this time, the connecting members may be coupled to the H beam by welding or coupled by fastening means such as bolts and nuts. In addition, the connection members may be formed in various forms such as straight or cross.

넷 째, 본 발명의 도면에서는 아치형 구조물과 최종터널의 상부의 형태가 서로 동일한 형태로 도시되어 있으나, 이에 한정되지 않고 지면의 조건에 따라 아치형 구조물의 좌우폭을 시공하고자 하는 최종터널의 상부폭보다 더 넓게 형성할 수도 있다. Fourth, in the drawings of the present invention, but the shape of the upper portion of the arcuate structure and the final tunnel is shown in the same form, but not limited to this, but the width of the arched structure according to the conditions of the ground more than the upper width of the upper end tunnel It can also be formed wide.

다섯 째, 토류판들을 아치형 H빔 사이에 끼우기 전에 터널의 상부벽에 콘크리트 라이닝층 형성하기 위한 와이어 매쉬를 아치형 H빔 사이에 미리 끼운 다음, 토류판들을 아치형 H빔 사이에 끼우는 것도 가능하다. 또한, 아치형 H빔의 상부에 와이어 매쉬를 덮고 그 위에 토류판들을 조밀하게 설치하는 것도 가능하다. Fifth, it is also possible to pre-fit a wire mesh for forming a concrete lining layer on the upper wall of the tunnel between the arch H beams before sandwiching the earth plates between the arch H beams, and then sandwich the earth plates between the arc H beams. It is also possible to cover the wire mesh on top of the arc-shaped H beam and to densely install the earth plates thereon.

전술한 바와 같이 구성된 본 발명 저토피구간의 반개착식 터널시공방법 및 터널시공용 아치형 구조물에 따르면, 과다한 사면절취와 별도의 보강없이 원지반을 터널의 천단아치에 해당하는 지점까지만 굴착함으로써, 과다한 사면절취에 의한 환경파괴 및 사면안정문제를 해결할 수 있다.According to the semi-opening tunnel construction method and the arch structure for tunnel construction of the low-pitched section of the present invention configured as described above, by excavating only the ground to the point corresponding to the top end of the tunnel without excessive slope cutting and additional reinforcement, Environmental destruction and slope stability problems caused by cutting can be solved.

본 발명에 따르면, 공장에서 미리 제작된 아치형 H빔과 토류판 및 기초부로 구성된 아치형 구조물을 이용함으로써, 시공의 편리함과 함께 공기 단축의 효과도 기대할 수 있으며, 아치형 구조물들이 서로 분리된 상태에서 서로 조립 시공됨으로써 하부 터널굴착에 의한 진동에 대해 일체로 반응하지 않고 개별적으로 반응하여 진동에 강한 구조물을 형성할 수 있다.According to the present invention, by using the arch structure consisting of a pre-fabricated arch H-beam, earth plate and foundation, it is possible to expect the convenience of the construction as well as the effect of shortening the air, the construction is assembled to each other in the state in which the arch structures are separated from each other By doing so, it is possible to form a structure that is resistant to vibration by reacting individually instead of integrally reacting to the vibration caused by the lower tunnel excavation.

본 발명에 따르면, 이치형 구조물이 콘크리트처럼 양생이 필요한 구조물이 아니기 때문에 아치형 구조물의 상부에 토사를 되메우는 되메움과정과 아치형 구조물의 하부에 있는 지반을 굴착하는 과정을 일정간격을 두고 동시에 수행할 수 있어 공사기간을 단축할 수 있다.According to the present invention, since the binary structure is not a structure that needs to be cured like concrete, the backfill process of filling the soil on the upper portion of the arched structure and the process of excavating the ground in the lower portion of the arched structure can be simultaneously performed at regular intervals. The construction period can be shortened.

본 발명에 따르면, 아치형 구조물이 설치된 후에는 그 상부에 절토된 흙을 되매움함으로써, 터널시공중에라도 지면으로 차량통행이 가능하기 때문에 지면에서 행해지는 다른 작업도 수행할 수 있다.According to the present invention, after the arch structure is installed, the soil cut into the upper part is refilled, so that the vehicle can pass to the ground even during the construction of the tunnel, so that other operations performed on the ground can be performed.

본 발명에 따르면, 아치형 구조물이 일정간격으로 설치되는 아치형 H빔과 그 사이에 조밀하게 끼워지는 토류판들을 포함하여 이루어짐으로써, 종방향과 횡방향으로 지반의 아칭효과가 발현되어 아치형 구조물의 상부 하중을 경감시켜줌에 따라 기초보강을 경감시킬 수 있다.According to the present invention, the arcuate structure is formed by including the arcuate H-beams are installed at regular intervals and the earth plate is densely sandwiched therebetween, the arching effect of the ground in the longitudinal and transverse direction is expressed to increase the upper load of the arched structure You can alleviate the foundation reinforcement by mitigating.

본 발명에 따르면, 절토바닥면을 아치형태로 굴착하지 않고 평평하게 굴착함으로써 시공성을 향상을 기대할 수 있다. According to the present invention, it is possible to expect the improvement of workability by excavating flat bottom surface without digging in the shape of an arch.

Claims (8)

도심지나 터널 갱구부, 산지 계곡부와 같이 토피가 얇은 구간의 터널을 시공하는 방법에 있어서,In the method of constructing a tunnel with a thin section of toffee, such as a downtown area, a tunnel shaft part, and a mountain valley part, 원지반을 일정 깊이로 절토하여 절토바닥면을 형성하는 단계;Cutting the ground to a certain depth to form a cut bottom surface; 상기 절토바닥면에 미리 제작된 아치형 구조물을 설치하는 단계;Installing a prefabricated arch structure on the cut bottom surface; 상기 아치형 구조물의 상부에 토사를 되메워 되메움층을 형성하는 단계; 및Forming a backfill layer by filling the soil back on top of the arcuate structure; And 상기 아치형 구조물의 하부에 있는 지반을 굴착하여 터널을 형성하는 단계를 포함하여 이루어진 것을 특징으로 하는 저토피구간의 반개착식 터널시공방법.Semi excavated tunnel construction method comprising the step of excavating the ground in the lower portion of the arcuate structure to form a tunnel. 제 1 항에 있어서,The method of claim 1, 상기 아치형 구조물은,The arch structure, 아치형으로 형성되며 절토바닥면에 이격 설치되는 복수 개의 아치형 H빔;A plurality of arcuate H beams formed in an arc shape and spaced apart from the cut bottom; 상기 아치형 H빔 사이에 조밀하게 끼워지는 복수 개의 토류판; 및A plurality of earth plates densely sandwiched between the arcuate H beams; And 상기 아치형 H빔의 양단부에 작용하는 하중을 지반에 전달할 수 있도록 된 기초부를 포함하여 이루어진 것을 특징으로 하는 저토피구간의 반개착식 터널시공방법.Semi-open tunnel construction method of the low toffee section, characterized in that it comprises a base for transmitting the load acting on both ends of the arc-shaped H beam to the ground. 도심지나 터널 갱구부, 산지 계곡부와 같이 토피가 얇은 구간의 터널을 시공하기 위한 아치형 구조물에 있어서,In the arch structure for constructing a tunnel of thin toffee section, such as urban area, tunnel shaft part, mountain valley part, 아치형으로 형성되며 절토된 절토바닥면에 이격 설치되는 복수 개의 아치형 H빔;A plurality of arched H beams formed in an arc shape and spaced apart from the cut ground surface; 상기 아치형 H빔 사이에 조밀하게 끼워지는 복수 개의 토류판; 및A plurality of earth plates densely sandwiched between the arcuate H beams; And 상기 아치형 H빔의 양단부에 작용하는 하중을 지반에 전달할 수 있도록 된 기초부를 포함하여 이루어진 것을 특징으로 하는 저토피구간의 반개착식 터널시공용 아치형 구조물.Arched structure for semi-attached tunnel construction of the low toffee section, characterized in that it comprises a base that can transmit the load acting on both ends of the arc-shaped H beam to the ground. 제 3 항에 있어서,The method of claim 3, wherein 상기 기초부는 독립기초 형태로 형성되어 상기 아치형 H빔들을 각각 지지하도록 이루어진 것을 특징으로 하는 저토피구간의 반개착식 터널시공용 아치형 구조물.The base portion is formed in the form of an independent foundation arched structure for semi-attached tunnel construction of the low toffee section, characterized in that made to support each of the arched H-beams. 제 3 항에 있어서, The method of claim 3, wherein 상기 기초부는 줄기초 형태로 형성되어 복수개의 아치형 H빔들을 동시에 지지하도록 이루어진 것을 특징으로 하는 저토피구간의 반개착식 터널시공용 아치형 구조물.The base portion is formed in the shape of a stem grass arch structure for a semi-open tunnel construction of a low topi section, characterized in that made to support a plurality of arc-shaped H beams at the same time. 제 3 항에 있어서,The method of claim 3, wherein 상기 아치형 H빔들을 서로 연결하여 아치형 구조물이 부등침하에 의해 손상받지 않도록 하는 연결부재를 더 포함하여 이루어진 것을 특징으로 하는 저토피구 간의 반개착식 터널시공용 아치형 구조물.The arched structure for semi-open tunnel construction between the low topi, characterized in that further comprising a connecting member for connecting the arched H-beams to each other so that the arched structure is not damaged by inequality. 제 3 항에 있어서,The method of claim 3, wherein 상기 토류판들을 상기 아치형 H빔들 사이에 끼우기 전에 아치형 H빔들 사이에 끼워지는 와이어 매쉬를 더 포함하여 이루어진 것을 특징으로 하는 저토피구간의 반개착식 터널시공용 아치형 구조물.Arched structure for semi-attached tunnel construction of the low toffee section, characterized in that further comprising a wire mesh fitted between the arcuate H beams before sandwiching the earth plate between the arcuate H beams. 제 3 항 내지 제 7 항중 어느 한 항에 있어서,The method according to any one of claims 3 to 7, 상기 기초부를 설치하기전 지반에 박아 기초부를 지지하도록 된 보강부재를 더 포함하여 이루어진 것을 특징으로 하는 저토피구간의 반개착식 터널시공용 아치형 구조물. Arched structure for semi-attached tunnel construction of the low toffee section, characterized in that it further comprises a reinforcing member driven to the ground before installing the base portion to support the base portion.
KR1020050079922A 2005-08-30 2005-08-30 Semi open cut type tunnel construction method at low overburden and arch type structure for tunnel construction KR20070095481A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182465A (en) * 2011-04-01 2011-09-14 长安大学 Tunnel-entering construction method for tunnel
CN103590836A (en) * 2013-11-26 2014-02-19 中铁第四勘察设计院集团有限公司 Method for processing tunnel collapse caused by shallow-buried excavation
CN104806271A (en) * 2015-05-15 2015-07-29 湖南科技大学 Precutting-groove U-shaped steel bracket with automatic propelling function and construction method thereof
CN107060778A (en) * 2017-06-15 2017-08-18 中铁十局集团第五工程有限公司 Pass through high-rise building group back filled region method for tunnel construction
CN110645024A (en) * 2019-09-02 2020-01-03 重庆市轨道交通设计研究院有限责任公司 Method for enlarging arch foot and primarily supporting arch cover
KR102208236B1 (en) 2020-07-31 2021-01-27 (주)하경엔지니어링 Semi Open Cut Type Supporting System of Tunnel and the Construction Method of Tunnel Using by Same
KR20220124995A (en) * 2021-03-04 2022-09-14 쌍용건설 주식회사 Construction method for immersed tunnel at low overburden
CN115492071A (en) * 2022-09-21 2022-12-20 甘肃省交通科学研究院集团有限公司 Reaction platform for static load test of foundation in highway tunnel and construction method thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182465A (en) * 2011-04-01 2011-09-14 长安大学 Tunnel-entering construction method for tunnel
CN103590836A (en) * 2013-11-26 2014-02-19 中铁第四勘察设计院集团有限公司 Method for processing tunnel collapse caused by shallow-buried excavation
CN104806271A (en) * 2015-05-15 2015-07-29 湖南科技大学 Precutting-groove U-shaped steel bracket with automatic propelling function and construction method thereof
CN107060778A (en) * 2017-06-15 2017-08-18 中铁十局集团第五工程有限公司 Pass through high-rise building group back filled region method for tunnel construction
CN110645024A (en) * 2019-09-02 2020-01-03 重庆市轨道交通设计研究院有限责任公司 Method for enlarging arch foot and primarily supporting arch cover
KR102208236B1 (en) 2020-07-31 2021-01-27 (주)하경엔지니어링 Semi Open Cut Type Supporting System of Tunnel and the Construction Method of Tunnel Using by Same
KR20220124995A (en) * 2021-03-04 2022-09-14 쌍용건설 주식회사 Construction method for immersed tunnel at low overburden
CN115492071A (en) * 2022-09-21 2022-12-20 甘肃省交通科学研究院集团有限公司 Reaction platform for static load test of foundation in highway tunnel and construction method thereof
CN115492071B (en) * 2022-09-21 2024-01-26 甘肃省交通科学研究院集团有限公司 Counterforce platform for static load test of foundation in highway tunnel and construction method thereof

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