KR20090064711A - Construction method of basement exterior wall applying the floor slab as the strut against the earth pressure from the temporary earth wall = tsw(thrusting slabbed wall) method - Google Patents

Construction method of basement exterior wall applying the floor slab as the strut against the earth pressure from the temporary earth wall = tsw(thrusting slabbed wall) method

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KR20090064711A
KR20090064711A KR1020070132011A KR20070132011A KR20090064711A KR 20090064711 A KR20090064711 A KR 20090064711A KR 1020070132011 A KR1020070132011 A KR 1020070132011A KR 20070132011 A KR20070132011 A KR 20070132011A KR 20090064711 A KR20090064711 A KR 20090064711A
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wall
basement
construction
floor
temporary
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KR1020070132011A
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Korean (ko)
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KR100982827B1 (en
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이창남
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이창남
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/045Underground 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
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00Production methods
    • E02D2250/0007Production methods using a mold
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00Production methods
    • E02D2250/0023Cast, i.e. in situ or in a mold or other formwork
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00Production methods
    • E02D2250/0061Production methods for working underwater
    • E02D2250/0069Welding

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

A construction method of a basement exterior wall supporting earth pressure of a temporary earth wall on the floor slab is provided to improve work efficiency by supporting earth pressure and water pressure delivered from an retaining wall through constructing a basement floor board downward. A construction method of a basement exterior wall supporting earth pressure of a temporary earth wall on the floor slab comprises: a step for performing sheeting construction to be adjacent to the outline of an exterior wall(6) and digging an inner ground of a retaining wall; a step for setting up a bracket(5) and a reinforcing agent(13) in a soldier pile(1); a step for attaching a shape steel(11) to the lower end of an upper flange and attaching a wall girder(2) to be adjacent to the free end and attaching a ground sill(3) to the wall girder and a steel column to complete steel beam construction; a step for constructing a bottom plate(4); a step for pouring the concrete in a form and the slab; a step for completing the basement floor construction by repeating the steps; and a step for performing outer wall construction from a lowermost story floor to a first story floor.

Description

바닥슬래브에 가설 흙막이 벽의 토압을 지지시키면서 지하실 합벽을 후시공하는 공법{Construction method of basement exterior wall applying the floor slab as the strut against the earth pressure from the temporary earth wall = TSW(Thrusting slabbed wall) method}Construction method of basement exterior wall applying the floor slab as the strut against the earth pressure from the temporary earth wall = TSW (Thrusting slabbed wall) method}

본 발명은 지하실 건축물을 안전하고 손쉽게 시공하는 방법이며, 더욱 상세하게는 지하굴토로 인한 공사장 주변의 지반 교란을 최소한으로 줄이는 역타공법을 효과적으로 수행하는 시공방법이다. 지하실 바닥판은 하중다리를 활용하여 하향 시공하면서도 지하실 외벽은 상향 시공하여 공사기간을 줄이고, 품질을 높이며 지하외벽 두께를 최소한으로 줄여 역타공법 적용 시 필요한 지하실 내부 환기구를 확보하는 공법이다.The present invention is a method for safely and easily constructing a basement building, and more particularly, a construction method that effectively performs the reverse drilling method to minimize the ground disturbance around the construction site due to underground pit. The basement deck is constructed by using load bridges, while the basement outer walls are constructed upwards to shorten the construction period, improve the quality and minimize the thickness of the basement outer walls to minimize the internal ventilation of the basement required when applying the reverse drilling method.

역타공법이 일반화된 30년 전에는 어스앵커나 스트럿으로 가설 흙막이벽을 지지하여 변형을 구속한 상태에서 기초 하단면까지 굴토공사를 완료하여 기초공사를 하고 상기 어스앵커나 스트럿을 조심스럽게 순차적으로 상향으로 제거하면서 한 층씩 바닥판 공사를 해서 상기 각 층의 바닥판이 갓 제거한 스트럿 역할을 대행하게 하는 순타공법이 주류를 이루었다. 이 경우 지하실 층수가 많거나 연약지반일 때는 장기간의 지하실 공사 과정에서 가설 흙막이가 편측토압과 수압에 견디지 못해 무너지거나 가설 흙막이벽이 지하실 내부로 변형을 일으켜서 지하실면적이 줄어드는 불상사가 일어나기도 했다.Thirty years ago, when the reverse drilling method was generalized, earthwork was completed with earth anchors or struts. The netting method, which performs the bottom plate construction one by one while removing the sole plate, acts as a freshly removed strut. In this case, in the case of a large number of basement floors or soft grounds, during the long-term basement construction process, the temporary earthquake collapsed because it could not withstand unilateral earth pressure and water pressure.

역타공법의 기본 원리는 가설 흙막이벽, 바닥판을 지지하는 현장타설 기초말뚝(15) 및 철골기둥(14)을 선시공(지반에 구멍을 뚫어 기초와 기둥을 일체로 선시공)하고 1층 바닥판을 시공한 다음 가설 흙막이벽(18)으로 구획된 내부 바닥판 아래의 흙을 한 층씩 순서대로 하향 굴토하여 흙막이 벽에 야기되는 편측토압을 별도의 어스앵커나 버팀대 대신 영구 바닥판에 지지시키면서 기초레벨까지 공사해 내려가는 공법이다. 그 사이 필요하면 선시공한 기둥에 의지하여 지상 2층 이상의 공사를 병행할 수 있으며 이를 top/down 공사라고 한다.The basic principle of reverse drilling method is to install temporary foundation walls, field foundation foundation piles (15) and steel pillars (14) supporting the bottom plate (holes are grounded by drilling holes in the ground) After construction, excavate the soil beneath the inner bottom plate partitioned by temporary wall 18 in order, and support the one-sided earth pressure caused by the wall by supporting the permanent floor plate instead of a separate earth anchor or brace. It is construction method going down. In the meantime, if necessary, you can rely on the pillars that have been pre-installed to perform two or more floors above ground, which is called top / down construction.

상기 역타공법이 순타공법 보다 안전성이 탁월하나 공사 기간이 길고 특별히 지하실 외벽 공사를 역타로 시공하는 것이 너무나 번거롭다. 즉 지하실 외벽의 상부 시공을 선행한 후에 하부 벽체 시공을 하려면 철근 이음도 문제지만 좌우 및 하부는 거푸집으로 막히고 상부는 선 타설한 직상 벽으로 모두 막힌 내부 공간에 콘크리트를 충전하는 것이 어렵고, 복잡한 절차를 거쳐 타설한 지하실 외벽의 직상부 선타설 구간과 직하부 후타설 구간의 이음부 콘크리트 불완전 충전여부를 조사하고 보수하는 수고와 공사비 상승을 감수하여야 한다.The reverse punching method is more safe than the pure punching method, but the construction period is longer and it is too cumbersome to construct the basement exterior wall work by reverse punching. In other words, if the lower wall construction is performed after the upper construction of the basement outer wall, rebar seam is also a problem, but it is difficult to fill concrete in the interior spaces blocked by formwork with the left and right and the lower part, and the upper part is lined with the straight line. Investigate and repair the incomplete filling of the joints in the upper and lower casting sections of the basement outer walls and the lower post pouring sections.

이를 해소하는 방법으로 최근 등록특허 제 0531385호에서는 하향공법이면서도 지하외벽을 후시공하는 방법을 제시하였으며 이는 지하외벽 단면 중앙에 H형강을 눕혀서 설치하는 매입형 철골띠장(토압 조건에 따라 도 8b와 같이 상하 2개 이상 복수라인으로 배치한다고 함 - 공사비 추가 원인)이 가설 흙막이벽(18)으로부터 전달되는 토압을 받아 내부 수평보와 스터드볼트를 통해 바닥판(콘크리트슬래브)으로 이관시키는 매개체로 활용하는 공법(도 8a와 도 8b)이다. 그러나 도 9에서 보는 바와 같이 지하실 바닥보(인용 발명에서는 내부 수평보로 표기)는 X방향과 Y방향 중 어느 한 방향의 보 간격이 3∼4m를 초과하는 것이 일반적인데 도 9의 경우 X방향 보의 간격이 넓어서 2개 이상 복수 라인으로 배열한 매립형 철골 띠장이라고 해도 가설 흙막이벽체에서 전달되는 토압을 콘크리트 슬래브에 전달할 수 없는 문제점을 내포하고 있다. 가설 흙막이 깊이가 깊어져서 지지하여야 하는 토압과 수압이 크게 증가하면 비록 매립형 철골띠장이 안전하다고 해도 바닥보에 전달되는 토압과 수압을 스터드볼트를 통해 바닥판(철근콘크리트 슬래브)에 전달하는데도 무리가 있다. 그러므로 위와 같이 큰 하중은 편심이 없는 직선으로 전달하는 방법을 채택해야 안전하다.As a method of solving this problem, recently registered patent No. 0531385 has proposed a method of post-construction of the underground outer wall, which is a downward construction method, which is a buried steel frame sheet installed by laying H-beam in the center of the cross section of the underground outer wall as shown in FIG. It is said to be arranged in two or more lines up and down-cause of additional construction cost) is a construction method that is used as a medium to transfer earth pressure from the temporary barrier wall 18 to the floor plate (concrete slab) through the horizontal beam and stud bolts. (FIGS. 8A and 8B). However, as shown in FIG. 9, in the basement floor beam (indicated as an inner horizontal beam in the cited invention), the beam spacing in either of the X direction and the Y direction generally exceeds 3 to 4 m. Because of the wide spacing between two or more embedded steel strips arranged in a plurality of lines, there is a problem in that the earth pressure transmitted from the temporary soil wall cannot be transferred to the concrete slab. If the earth pressure and water pressure to be supported due to the deepening of the hypothesis are greatly increased, it is difficult to transmit the earth pressure and water pressure transmitted to the floor beams through the stud bolts to the bottom plate (reinforced concrete slab) even though the buried steel frame is safe. . Therefore, it is safe to adopt such a method that the large load is transmitted in a straight line without eccentricity.

또한 위 매입형 철골띠장은 지하외벽 중앙에 설치함으로 인하여 지하외벽 전체 두께에서 매입형 철골띠장의 폭을 뺀 나머지 공간을 절반으로 나눈 좁은 공간(좌우 각각 75mm)(도 7)에 벽체의 수직철근을 배근하고 그 구멍으로 콘크리트를 부어 넣어야 하므로 지하 외벽의 두께는 350mm 이상이라야 하나 일반적으로 지하 1층은 벽두께가 200mm, 지하 2층은 300mm로도 안전하므로 낭비 요인이 있다(지하실 외벽을 엄지말뚝과 합성설계를 하면 지하 2, 3층까지 200mm정도로도 가능함).In addition, because the buried steel frame is installed in the center of the basement outer wall, the vertical reinforcement of the wall is placed in a narrow space (75 mm each left and right) (Fig. 7), which is divided by half the total space of the basement wall minus the width of the embedded steel frame length. The thickness of the outer wall of the basement should be more than 350mm because it is necessary to pour concrete into the hole, but in general, the basement floor has a wall thickness of 200mm and the basement 2 floor is 300mm safe, which is a waste. If the design is possible, it can be about 200mm up to the 2nd and 3rd basement floor).

하향공법의 진수는 가설 흙막이벽(18)이 받는 토압을 바닥판(4)에 직접 전달하는 것인데 상기 가설 흙막이벽(18)과 바닥판(4) 사이에는 지하실 외벽(6)이 있으므로 벽체를 후시공하면서도 상기 토압이 바닥판에 직접 전달되는 방법(하중다리(17))을 모색해야 한다. 토압은 지하수압과 더불어 큰 값이므로 가설 흙막이벽과 바닥판(4) 사이에 하중 전달 단계가 적을수록 유리하며 전달 경로가 직선을 벗어나면 편심응력을 처리하는 비용이 증가한다. 따라서 하중 전달 경로는 될수록 간단 명확해야 한다.The essence of the downward method is to transfer the earth pressure received by the temporary barrier wall 18 directly to the bottom plate 4, and since the basement outer wall 6 is located between the temporary barrier wall 18 and the bottom plate 4, It is necessary to find a method (load bridge 17) in which the earth pressure is transmitted directly to the bottom plate while being constructed. As the earth pressure is a large value along with the groundwater pressure, the smaller the load transfer step between the temporary barrier wall and the bottom plate 4 is advantageous, and the cost of handling the eccentric stress increases when the transmission path is out of the straight line. Therefore, the load transfer path should be as simple and clear as possible.

하향공법에서 바닥판 시공 기간은 짧을수록 좋고 사용 재료의 단위 중량이 적을수록 좋다. 따라서 거푸집 등 가설공사를 피하고 철골재를 보 부재 등으로 활용할 때도 바닥판과 합성설계를 하는 것이 효과적이다. 하향공법은 상부가 바닥판으로 덮인 상태여서 모든 자재 운반은 바닥판에 마련한 특정 개구부를 통해서 하향시켜야하며, 상부에는 바닥판으로 막혀 있는 상태에서 선시공된 기둥을 피하여 수평이동 해야 하므로 타워크레인을 자유롭게 사용하는 상향공법과는 달리 무거운 부재를 사용하는 것을 피해야 한다.The shorter the construction period of the bottom plate in the down-hole method, the better the unit weight of the material used. Therefore, it is effective to do flooring and composite design when avoiding construction work such as formwork and using steel aggregate as a beam member. The downward method is the upper part covered with the bottom plate, so all material transportation should be downward through the specific opening provided in the bottom plate, and the top crane should be horizontally moved to avoid horizontally installed pillars while the upper part is blocked with the bottom plate. Contrary to the uplift method, heavy members should be avoided.

하향공법에서 바닥판 시공은 당연히 위에서 아래로 시행하여야 하나 벽체 시공은 상향 즉 콘크리트 순타 공법이 바람직하다, 또한 가설 흙막이벽(18)과 바닥판(4) 사이에 환기구(16)가 있으면 굴토공사 중 장비 매연배출에 도움이 된다.In the downward construction method, the bottom plate construction should be conducted from the top to the bottom, but the wall construction is preferred to be upward, that is, the concrete netting method. In addition, if there is a ventilation hole 16 between the temporary wall 18 and the base plate 4, Helps to discharge equipment fumes.

본 발명에서 제시하는 공법은 기존의 하향공법들이 테두리보(지하실 외벽과 바닥판이 만나는 위치에 있는 perimeter girder)가 지하실 외벽이 차지하는 공간을 겸용하는데 반해 바닥판 쪽으로 이동시켜 선시공 함으로 지하실 외벽공사 시기와 무관하고, 가설 흙막이벽(18)으로부터 전달되는 토압을 하중다리(17)를 통해 바닥판에 손쉽게 전달하게 하는 것이다(도 1a).In the method proposed in the present invention, the existing down construction methods are used for the perimeter girder at the location where the basement outer wall and the bottom plate meet the space occupied by the basement outer wall. And, the earth pressure transmitted from the temporary barrier wall 18 is to be easily transmitted to the bottom plate through the load bridge (17) (Fig. 1a).

지하실 바닥판을 하향 시공하여 흙막이벽으로부터 전달되는 토압과 수압을 하중다리(17)를 통해 지하실 바닥판(4)에 효과적으로 지지하면서도 지하실 외벽은 최하층 바닥을 공사한 후 순타로 시공할 수 있으므로 작업 능률이 오를 뿐만 아니라 지하실 외벽을 후시공함으로 인하여 임시로 마련된 환기구(16)를 통해 굴토장비 매연을 배출할 수 있어서 위생적이다. 또한 경량 TSC 보를 테두리보(2) 및 바닥보(3)로 활용하면 운반 조립이 용이하고 토압지지 능력도 탁월하다.While the basement floor plate is installed downward, the earth pressure and water pressure transmitted from the retaining wall can be effectively supported on the basement floor plate 4 through the load bridge 17, while the basement outer wall can be constructed with a smooth after the bottom floor is constructed. As well as up, the construction of the basement outer wall through post-ventilation openings (16) temporarily provided, it is possible to discharge the fume equipment soot is hygienic. In addition, the use of lightweight TSC beams as rim beams (2) and floor beams (3) is easy to transport assembly and excellent earth pressure support ability.

도 1, 1a는 TSW의 주단면도,1, 1A is a sectional view of the main part of the TSW,

도 2는 TSW의 부분 평면도,2 is a partial plan view of a TSW;

도 3a는 TSW 철골조의 까치발Figure 3a is the bracket of the TSW steel frame

도 3b는 도 3a에 보강재를 부착한 사시도,Figure 3b is a perspective view of the reinforcing material attached to Figure 3a,

도 4는 TSW 철골조에 하중다리 ㄷ형 리브라스 거푸집을 부착한 사시도,Figure 4 is a perspective view attached to the load bridge c-shaped reversal form the TSW steel frame,

도 5는 하중다리 ㄷ형 리브라스 거푸집의 사시도,5 is a perspective view of the load bridge c-shaped brass formwork,

도 6은 테두리보에 경계강판을 부착한 사시도,6 is a perspective view attached to the rim beam rim steel plate,

도 7은 등록특허 제 0531385호 공법의 단면도,7 is a cross-sectional view of the method No. 0531385,

도 8a와 도 8b는 도 7 공법의 토압저항 흐름도,8A and 8B are a flowchart of earth pressure resistance of the method of FIG. 7;

도 9는 지하실 바닥판의 토압저항 흐름도9 is a flowchart of earth pressure resistance of the basement base plate

도 10a부터 10e까지는 본 발명의 단계별 시공 상태의 개략 단면도이다.10A to 10E are schematic cross-sectional views of the step-by-step construction state of the present invention.

<도면의 부호에 대한 간단한 설명><Brief description of the symbols in the drawings>

1 : 엄지말뚝(H형강 등) 2 : 테두리보(TSC 보)1: Thumb pile (H-beam, etc.) 2: Rim beam (TSC beam)

3 : 바닥보(TSC 보 또는 H형강 등)3: Floor beam (TSC beam or H-beam, etc.)

4 : 바닥판(트러스데크 위 바닥 콘크리트) 5 : 까치발(H-294×200×8×12 등)4: Bottom plate (floor concrete on truss deck) 5: Bracket (H-294 × 200 × 8 × 12, etc.)

6 : 지하실 외벽(합벽) 7 : 수직 내부철근6: basement exterior wall (plywood) 7: vertical interior rebar

8 : 수직 외부철근 9 : ㄷ형 리브라스 거푸집8: vertical external reinforcing bar 9: c-shaped reversal formwork

10: 경계강판 11: ㄱ형강(L-50×50×4 등)10: boundary steel plate 11: a section steel (L-50 × 50 × 4 etc.)

12: 씨아이피(Cast in place concrete pile, CIP)12: CIP (Cast in place concrete pile, CIP)

13: 보강재(구조계산으로 필요할 경우)13: Stiffener (if necessary for structural calculation)

14: 철골기둥 15: 현장타설 기초말뚝14: Steel pillars 15: Foundation piles

16: 환기구 17: 하중다리(load bridge)16: Ventilation opening 17: load bridge

18: 가설 흙막이벽(1과 12의 조합) 19: 슬래브18: Temporary wall (combination of 1 and 12) 19: Slab

# TSC 보 : 강판을 성형한 영구거푸집 내부에 콘크리트를 부어넣은 합성보, 국내 공사현장에 다량 적용중임# TSC beam: Composite beam with concrete poured inside the permanent formwork that forms the steel sheet, and it is being applied to the domestic construction site in large quantities.

상기 기술적 과제를 달성하기 위한 수단으로 본 발명에서 제시하는 지하실 하향공법은 가설 흙막이벽(18)으로부터의 토압과 수압을 지하실 바닥판(4)에 효과적으로 전달하는 방법으로 아래 공정으로 진행한다.As a means for achieving the above technical problem, the basement downward method proposed by the present invention proceeds to the following process as a method of effectively transferring the earth pressure and water pressure from the temporary barrier wall 18 to the basement base plate 4.

[1] 가설 흙막이벽(18) 및 기둥 공사(도 10a) ; 통상의 방법으로 지하실 외벽 외곽선 에 연하여 가설 흙막이 공사를 실시하며 본 설명에서는 H형강 엄지말뚝과 CIP 현장타설 철근콘크리트 말뚝을 예로 든다. 또한 통상의 방법으로 건물의 기둥 위치에 구멍을 뚫어 현장타설 기초말뚝(15)과 철골기둥을 세운다. 위 가설 흙막이와 기둥의 레벨은 각층 바닥레벨을 감안하여 정한다. 그 후 1단 굴착을 하고 엄지말뚝(1)을 노출시켜 까치발(도 3a)과 필요하면 보강재(13)를 용접한다(도 3b).[1] temporary temporary wall 18 and column construction (FIG. 10A); In the usual way, the construction of the temporary cladding is carried out on the outer walls of the basement. In this description, the H-beam thumb pile and the CIP cast-in-place reinforced concrete pile are taken as examples. In addition, a hole in the pillar position of the building in the usual way to build the foundation pile 15 and steel pillars. The level of the hypothesis cinder and pillar is determined by considering the floor level of each floor. After that, the first stage is excavated and the thumb pile 1 is exposed to weld the bracket foot (FIG. 3A) and the reinforcement 13 if necessary (FIG. 3B).

[2] 1층 바닥 공사 (도 10b) ; 인접한 좌우 까치발(5)의 고정단 상부 플랜지 하단에 직각방향으로 각각 ㄱ형강(11)을 부착하고 자유단 끝에 연하여 직각 방향으로 경계강판(10)을 용접한 테두리보(2)를 부착한다. 상기 테두리보와 철골기둥에 바닥보(3)를 부착한 후 추가로 필요한 철골보 공사를 완료하고 흙막이벽과 경계강판 사이에 하중다리(17) 콘크리트 타설을 위한 ㄷ형 리브라스 거푸집(9)을 삽입한다. 필요 시 엄지말뚝(1)과 경계강판(10) 사이에도 ㄷ형 리브라스 거푸집(9)을 삽입하고 바닥판(4)으로 트러스데크를 적용하며 ㄷ형 리브라스 내부 하중다리(17)와 슬래브(19)에 콘크리트를 타설한다. 또한 바닥판에는 필요한 작업용 개구부를 마련한다. 상기 자유단의 길이는 흙막이벽 H형강의 시공 직진도에 따라 차이가 있으며 현장 정밀측정을 거친 제작이라도 해도 다소간의 오차가 있을 것이므로 도 1b와 같이 테두리보와의 부착은 슬로트홀을 뚫은 맞춤철판을 먼저 까치발에 볼트접합 하고나서 맞춤철판을 테두리보에 용접하는 방법을 채택한다.[2] ground floor construction (FIG. 10b); Attach the a-beams 11 at right angles to the lower ends of the fixed flange upper flanges of the adjacent left and right bracket feet 5, and attach the rim beams 2 welded to the free end of the edge steel plate 10 at right angles. After attaching the bottom beam (3) to the rim beam and steel column, complete the necessary steel beam construction and insert the c-shaped rebras formwork (9) for placing the load bridge (17) concrete between the retaining wall and the boundary steel plate. . If necessary, insert the c-shaped reversal formwork (9) between the thumb pile (1) and the boundary steel plate (10) and apply a truss deck with the bottom plate (4), and the t-shaped rebras internal load leg (17) and the slab (19). Pour concrete into the. The bottom plate is also provided with necessary openings for work. The length of the free end varies depending on the straightness of the construction of the H-beam of the retaining wall, and even if it is manufactured through a site-precision measurement, there will be some errors. Therefore, as shown in FIG. First of all, it adopts the method of bolting to the bracket, and then welding the custom steel plate to the rim beam.

[3] B1층 바닥 공사 (도 10c) ; 2단 굴착을 하고 나서 상기 [2]와 같은 방법으로 B1층 바닥 공사를 완료한다.[3] B1 floor construction (FIG. 10c); After the second stage excavation, B1 floor construction is completed in the same manner as in [2].

[4] 기초공사 및 지상층 공사 (도 10d) ; 상기 [2]와 같은 방법으로 최하층 상부 바닥공사가 끝나면 최하층 바닥 공사를 한다. 이 때 필요하면 지상부 바닥 공사도 병행한다.[4] foundation work and ground floor work (FIG. 10D); In the same way as in [2], after the bottom floor construction is completed, the bottom floor construction is performed. At this time, if necessary, the ground floor construction is also performed.

[5] 지하실 외벽 공사 (도 10e) ; 최하층 바다에서부터 1층 바닥까지 상향으로 지하실 외벽 공사를 한다. 도 1a에서 보는 바와 같이 흙막이벽의 토압은 일부 까치발(5)을 거쳐 테두리보(2)와 바닥보(3) 및 바닥판(4)으로 전달되기는 하나 하중 흐름의 주경로는 하중다리 즉 ㄷ형 리브라스 거푸집(9)내의 콘크리트(필요하면 철근 보강)를 통해 경계철판(10)과 바닥판(4)에 직접 확실하게 전달되므로 별도의 추가 조치 없이도 안전성이 확보되는 장점이 있다. 상기 하중다리(17) 사이의 빈 공간은 지하 굴토공사 중 장비 매연 환기구(16)로도 활용하다가 기초 공사가 완료되면 철근을 배근하고 콘크리트를 부어넣는 공간으로 이용한다. 테두리보(2)와 바닥보(3)의 대표적인 단면으로 TSC 보를 택한 이유는 하향공법의 특성상 일반 H형강에 비하여 자중이 절반 정도이므로 좁은 공간에서의 운반 조립이 용이하다. 또한 단면 내부에 부어 넣는 콘크리트와 바닥판 콘크리트가 협력하여 합성보 역할을 할 뿐만 아니라 본 발명의 주요 해결 목표인 토압을 받는 압축재로서의 효과로는 단면 내부의 콘크리트가 큰 도움이 되기 때문이기도 하다.[5] basement exterior wall construction (FIG. 10E); The basement outer wall is constructed from the bottom sea to the ground floor. As shown in FIG. 1A, the earth pressure of the retaining wall is transmitted to the rim beam 2, the bottom beam 3, and the bottom plate 4 through some of the brackets 5, but the main path of the load flow is the load bridge, ie the rib. Since the concrete within the lath formwork 9 (reinforced reinforcement if necessary) is directly transmitted to the boundary plate 10 and the bottom plate 4 directly, there is an advantage that safety is secured without any additional measures. The empty space between the load bridge (17) is also used as a ventilation exhaust hole (16) of the equipment during the underground excavation work, and when the basic construction is completed, it is used as a space to reinforce the reinforcement and pour concrete. The reason why the TSC beam is selected as the representative cross-section of the rim beam (2) and the floor beam (3) is that it is easy to transport and assemble in a narrow space because its own weight is about half of that of the general H-beam. In addition, the concrete poured into the cross section and the bottom plate concrete not only acts as a composite beam, but also because the effect as a compressive material subjected to earth pressure, which is the main solution of the present invention, is because the concrete inside the cross section is a great help.

[6] 일반적으로 건물의 구조체에서 중요한 역할을 하는 바닥보(3)와 테두리보(2)는 사전 발주하여 철구공장에서 제작하여 현장에 운반 조립한다. 따라서 테두리보를 경계로 한 지하실 내부 골조의 규격에는 변화가 없어야 공사 기간에 차질을 주지 않는다. 그러나 지금까지 발표된 하향곰법은 모두 바닥보(3)가 지하실 외벽 속으로 뚫고 들어가서 가설 흙막이벽(18)과 근접 조립되어야 하므로 바닥보의 길이가 도10d와 같이 흙파기를 끝낸 다음에야 최종 확인하는 경우가 많으므로 슬로트홀을 두어 편차를 흡수하도록 한다.[6] In general, the floor beams (3) and the rim beams (2), which play an important role in the structure of the building, are pre-ordered and manufactured in a steel ball factory, and transported to the site. Therefore, there should be no change in the size of the frame of the basement framed around the rim beam, so that the construction period will not be affected. However, all of the downward bear methods published so far have to be assembled into the basement outer wall and closely assembled with the temporary barrier wall 18. Therefore, the bottom beam length must be finally confirmed after finishing the dug as shown in FIG. 10d. In many cases, slot holes are used to absorb deviations.

Claims (1)

지하실을 축조함에 있어서 가설 흙막이벽(18)으로 부터 토압과 수압을 지하실 바닥판에 효과적으로 전달하고, 지하실 외벽은 지하 최하층 바닥 공사 후 상향시공(순타공법)하는 공법에 있어서,In constructing the basement, in the construction method, the earth pressure and water pressure are effectively transmitted from the temporary barrier wall 18 to the basement base plate, and the basement outer wall is upwardly constructed after the bottom of the basement floor. (a) 통상의 방법으로 지하실 외벽(6) 외곽선에 연하여 가설 흙막이 공사를 실시하고 건물의 기둥 위치에 구멍을 뚫어 현장타설 기초말뚝(15)과 철골기둥(14)을 세우고 상기 가설 흙막이벽(18) 내부 지반을 1단 굴착하는 단계;(a) In the usual way, the temporary wall construction is carried out in connection with the outer wall of the basement outer wall (6), and the foundation site (15) and the steel column (14) are erected by drilling holes at the pillar positions of the building, and the temporary wall ( 18) excavating the internal ground one step; (b) 상기 엄지말뚝(1)에 까치발(5)과 보강재료(13)를 설치하는 단계;(b) installing the bracket 5 and the reinforcing material 13 on the thumb pile 1; (c) 상기 인접한 좌우 까치발(5)의 고정단 상부 플랜지 하단에 직각방향으로 ㄱ형강(11)을 부착하고 자유단들 끝에 연하여 직각 방향으로 경계강판(10)을 용접한 테두리보(2)를 부착하고 상기 테두리보(2)와 철골기둥에 바닥보(3)를 부착하며, 추가로 필요한 철골보 공사를 완료하는 단계;(c) The rim beam (2) attached with the a-beam (11) in the right angle to the lower end of the upper flange of the fixed end of the adjacent left and right bracket feet (5) and connected to the ends of the free ends to weld the boundary steel plate (10) at right angles. Attaching and attaching the floor beam (3) to the rim beam (2) and the steel frame pillar, further completing the required steel beam construction; (d) 가설 흙막이벽(18)과 경계강판(10) 사이에 하중다리용 ㄷ형 리브라스 거푸집(9)을 삽입하고, 엄지말뚝(1)과 경계강판(10) 사이에 ㄷ형 리브라스 거푸집(9)을 삽입하여 바닥판(4)을 시공하는 단계;(d) Insert the c-shaped reversal formwork (9) for the load bridge between the temporary retaining wall (18) and the boundary steel plate (10), and the c-shaped reversal formwork (9) between the thumb pile (1) and the boundary steel plate (10). Inserting a) to construct the bottom plate 4; (e) 상기 ㄷ형 리브라스 거푸집 내부와 슬래브(19)에 콘크리트를 타설하는 단계;(e) placing concrete in the c-shaped ribs and inside the slab (19); (f) 2단 굴착을 하고 상기 (b)부터 (e)의 공정을 최하층 레벨까지 반복하여 지하실 바닥 공사를 완성하는 단계;(f) performing two-stage excavation and repeating the steps (b) to (e) to the lowest floor level to complete the basement floor construction; (g) 상기 흙막이 내부와 테두리보 사이 빈 공간에 최하층 바닥에서부터 1층 바닥까지 상방향으로 지하실 외벽 공사를 시행하는 단계;(g) performing a basement outer wall construction from the bottom floor to the first floor in an empty space between the inside of the retaining wall and the rim beam; 를 포함하여 하중다리(17)를 제외한 지하실 외벽을 후시공 하는 것을 특징으로 하는 바닥슬래브에 가설 흙막이 벽의 토압을 지지시키면서 지하실 합벽을 후시공하는 공법.Method for post-installing the basement plywood while supporting the earth pressure of the temporary mud wall on the floor slab, characterized in that the construction of the basement outer wall except for the load bridge (17).
KR1020070132011A 2007-12-17 2007-12-17 Construction method of basement exterior wall applying the floor slab as the strut against the earth pressure from the temporary earth wall = TSW(Thrusting slabbed wall) method KR100982827B1 (en)

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CN114855875A (en) * 2022-05-31 2022-08-05 深圳市工勘岩土集团有限公司 Basement floor construction method based on stand column assembly type fixing
CN116005990A (en) * 2023-02-08 2023-04-25 上海市城市建设设计研究总院(集团)有限公司 Construction method for reforming basement roof of girderless floor system into beam-slab system
CN116837899A (en) * 2023-09-01 2023-10-03 北京建工集团有限责任公司 Construction method for formwork support in narrow space
CN116837899B (en) * 2023-09-01 2023-12-12 北京建工集团有限责任公司 Construction method for formwork support in narrow space

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