KR20090099335A - A process of steel pipe post and the head armature for a pondside strengthening - Google Patents

A process of steel pipe post and the head armature for a pondside strengthening Download PDF

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KR20090099335A
KR20090099335A KR1020080024516A KR20080024516A KR20090099335A KR 20090099335 A KR20090099335 A KR 20090099335A KR 1020080024516 A KR1020080024516 A KR 1020080024516A KR 20080024516 A KR20080024516 A KR 20080024516A KR 20090099335 A KR20090099335 A KR 20090099335A
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South Korea
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steel pipe
head
pipe pile
reinforcement
head reinforcing
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KR1020080024516A
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Korean (ko)
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KR100994398B1 (en
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김동하
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에이원스틸(주)
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/10—Deep foundations
    • E02D27/12—Pile foundations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/24—Prefabricated piles
    • E02D5/28—Prefabricated piles made of steel or other metals
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2200/00—Geometrical or physical properties
    • E02D2200/16—Shapes
    • E02D2200/1685—Shapes cylindrical
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0026—Metals
    • E02D2300/0029—Steel; Iron

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

A manufacturing method of an intended steel pile and a head reinforcing member is provided to reduce the construction cost and the processing time by removing a bolt coupling process in the head reinforcing task. A manufacturing method of an intended steel pile and a head reinforcing member comprises followings. A steel pipe pile(10) is hammered to the stable ground and it fixes. A plurality of head reinforcing members(16) is manufactured. Using each cross groove(12b) formed in the head reinforcing member, a plurality of head reinforcing members is crossed. An inlet stopping step(12a) of the head reinforcing member is stuck in an entrance ring shape ending(11) of the steel pipe pile. The head reinforcing member is inserted inside the entrance of the upper side terminal of the steel pipe pile. After an annular mold steel plate(14) is settled, a longitudinal axis band steel insert hole connects an annular lateral tie hoop(13) and a longitudinal axis tie hoop in order to make a tie hoop assembly. The placing concrete and cure work are performed after binding the tie hoop assembly and head reinforcing member.

Description

지반 강화를 목적으로 하는 강관말뚝과 두부보강재의 제조방법{A PROCESS OF STEEL PIPE POST AND THE HEAD ARMATURE FOR A PONDSIDE STRENGTHENING}Manufacturing method of steel pipe pile and tofu reinforcement for the purpose of reinforcing the ground {A PROCESS OF STEEL PIPE POST AND THE HEAD ARMATURE FOR A PONDSIDE STRENGTHENING}

본 발명은 콘크리트 구조물공사에 있어서 연약지반을 강관말뚝을 박아서 지반을 강화함에 따른 강관말뚝 상단부와 구조물의 하부접합부의 콘크리트 결속을 강화 시키는 방법으로, 강관말뚝과 두부보강재의 접합방식을 볼트접합이나 용접접합 방식을 전혀 사용하지 않고 순수조립식 방법을 사용할 수 있도록 강관말뚝과 두부 보강재를 제조함으로써 공사 재료비 절감과 작업시간 단축을 가져올 수 있도록 하기 한 것이다.The present invention is a method of strengthening the concrete binding of the upper part of the steel pipe pile and the lower joint of the structure by strengthening the ground by driving the steel pipe pile in the concrete structure construction, the connection method of the steel pipe pile and the head reinforcement bolts or The steel pipe pile and the head reinforcement were manufactured to use the purely prefabricated method without using the welding method at all, thereby reducing the construction material cost and reducing the working time.

본 발명은 종래의 지반 강화를 위하여 강관말뚝 타설 후에 두부 보강을 하여 콘크리트 기둥을 세우기 위한 보강 철근을 말뚝 상단부에 접합시키는 방법에 있어서 강관말뚝 상단부 외주 면의 일 지점들에 볼트접합용 접합 구를 천공하거나 말뚝 상단부 내주면 하부의 일 지점에 거푸집 받침 판용 걸림 턱을 용접하거나 보강 부재들 간에도 용접이나 볼트 체결방식을 사용함으로 인하여 지나친 작업 부대비용이 소요되고 작업과정 또한 복잡하고 번거로워서 작업공정이 더뎌지는 등의 문제점을 해결하고자 하는 것이다The present invention in the method for joining the reinforcing reinforcing rod to the upper end of the pile to erect the concrete pillar after reinforcing the head after the steel pipe pile in order to reinforce the conventional ground boring the splicing hole for the bolt joint at one point of the outer peripheral surface of the steel pipe pile In addition, welding the formwork plate hanging jaw at the lower part of the inner circumferential surface of the pile or welding or bolting method between the reinforcing members requires excessive work costs and the work process is complicated and cumbersome, which slows down the work process. To solve the problem

본 발명은 상기의 문제점들을 해결하기 위하여 강관말뚝과 두부 보강 철근을 한 조의 세트 형식으로 제조하는 방식을 사용하는 것으로,먼저 콘크리트 구조물의 규모에 맞는 지름크기와 길이가 정해지면 상기의 규격에 맞는 강관말뚝을 제조한 다음에 제조된 강관말뚝의 두부의 지름의 크기에 상응되도록 두부보강재을 양쪽 측면부와 바닥 부를 일체가 되도록 성형하고 양쪽 측면 부의 중간 지점에 걸림 턱을 각각 구비하고 바닥 부 중간에는 교차 홈이 구비된 두부보강재을 다수 개 제조하여 바닥 부가 교차 되도록 말뚝 내부로 보강철근의 양쪽 걸림 턱까지 삽입하여 준 다음에 교차 된 바닥부위에 환형거푸집 받침 판을 얹어준 다음에 횡축 환형 띠 철근 결속작업과 종축 띠 철근 결속작업을 완료한 후에 콘크리트 타설 공사를 실시하게 함으로써 해결할 수 있는 것이다.The present invention uses a method of manufacturing a set of steel pipe piles and head reinforcement reinforcing bar in order to solve the above problems, first, if the diameter size and length suitable for the scale of the concrete structure is determined, After the pile is manufactured, the head reinforcement is formed to be integral with both side portions and the bottom portion so as to correspond to the size of the head of the manufactured steel pipe pile. Manufacture a number of head reinforcement materials and insert them into both piles of the reinforcement bars in the pile so that the floors intersect, and then put the annular formwork plate on the crossed floors. After completing the reinforcing bars, do the concrete pouring work. It can be.

본 발명의 구체적 실시내용을 콘크리트 구조물의 지반강화 공사에 적용시킴으로써,소요되는 강관과 두부 보강 철근의 세트화된 제조 생산이 가능하여 생산효율이 더욱 향상되었으며,두부보강작업 과정적인 측면에서도 용접이나 볼트의 연결 조임등이 필요 없으므로 작업 소요비용이 그만큼 절약되며 작업공정 속도 또한 획기적으로 신속하게 진행할 수 있는 장점 등의 적용효과가 있는 것이다.By applying the specific embodiments of the present invention to the ground reinforcement of concrete structures, it is possible to set production production of the required steel pipe and reinforcing reinforcing bars, further improved the production efficiency, welding or bolt in terms of the process of reinforcing head This eliminates the need for fasteners, so that the cost of work is saved, and the speed of the work process can be dramatically improved.

이하 본 발명의 구체적인 실시내용을 첨부한 도면을 참조하여 상세하게 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 강관말뚝과 두부보강재의 보강구조의 단면도를 나타내며,도 2는 강관말뚝 두부보강재의 분리 사시 도를 나타내고 있다.Figure 1 shows a cross-sectional view of the reinforcing structure of the steel pipe pile and the head reinforcement, Figure 2 shows a separated perspective view of the steel pipe pile head reinforcement.

도 1과 도 2를 함께 참조하여 보면,먼저 도면 1에서 강관말뚝(10)과 두부보강재(16) 및 환형 거푸집 철판(14) 및 기초구조물 하면 주 철근(15)이 한 세트 일체로 시공되어 있는 것을 볼 수 있는데,확대 기초공사 구조물의 공사규모나 범위가 정하여지면 상기에 따른 적정 규모의 강관말뚝(10)을 지반의 조건에 맞는 길이와 두께 및 지름으로 제조한 다음에 강관말뚝(10)의 지름규격에 조화되도록 상측 두부보강재 상측 부(12)과 두부보강재 하측 부(12d) 및 두부보강재 하측 저면 부(12c) 가 일체형인 하나의 두부보강재(16)을 금형프레스 성형방식으로 소요 공사에 필요한 갯 수만큼을 다량으로 신속하게 제조할 수 있는 것이다.Referring to Figure 1 and 2 together, first, in Figure 1, the steel pipe pile 10, the head reinforcement 16 and the annular formwork iron plate 14 and the base structure of the main reinforcing bar 15 is integrally constructed as a set If the construction scale or scope of the enlarged basic construction structure is determined, the steel pipe pile 10 of appropriate size according to the above is manufactured to a length, thickness and diameter suitable for the condition of the ground, and then the steel pipe pile 10 One head stiffener (16) in which the upper head stiffener upper part (12), the head stiffener lower part (12d) and the head stiffener lower bottom part (12c) is integrated to be conformed to the diameter standard is required for the required construction by the mold press molding method. It is possible to quickly produce a large amount of the number.

상기와 같이 두부보강재(16)을 금형프레스 성형방식으로 제조함에 있어서,두부보강재 상측 부(12) 의 내면 부에서부터 일정한 간격으로 이격을 두면서 돌출 걸림 턱(12e)이 두부보강재 하측 부(12d)의 내면 부까지 성형 되도록 함으로써 환형 횡 띠 철근(13)을 거치 및 결속할 수 있도록 하고,두부보강재 상측 부 (12)와 두부보강재 하측 부(12d) 사이에 입구 걸림 턱(12a)을 구비하여 두부보강재(16)이 강관 말뚝(10)의 입구 환형 단 부(11)의 입구 걸림 턱(12a)에 의하여 걸 착 될 수 있도록 하기 위한 것이며,두부보강재 하측 저면 부(12c)의 중앙지점에는 교차 홈(12b)을 성형하여 두부보강재 하측 저면 부(12c)가 교차 홈(12b)에 의해 다수 개가 서로 교차 되어 강관말뚝(10) 내부에 삽입될 수 있도록 하였는데,기본적으로 강관말뚝(10) 한 개당 세 편의 두부보강재(16)을 서로 교차시켜서 보강작업을 하는데,상기에 있어서는 세 편중 한 편의 두부보강재(16)은 교차 홈(12b)을 성형하지않고 맨 윗 쪽에 교차시키고 나머지 두 편의 두부보강재(16)은 굴곡의 차등을 두어 교차 홈(12b)을 성형하여 교차 홈(12b)이 가장 큰 것을 맨 아래쪽에 교차시키고 그 다음 크기를 중간에 교차시킴으로써,교차 된 두부보강재 하측 저면 부(12c)의 상부에 환형 거푸집 철판(14)을 삽입하여 올려놓음에 있어 평 단면을 확보할 수 있도록 하기 위한 것이다.In manufacturing the head reinforcement material 16 by the mold press molding method as described above, the projecting locking jaw 12e is spaced apart from the inner surface portion of the head reinforcement upper part 12 at regular intervals so that the head reinforcement lower part 12d of the head reinforcement material 12d is formed. By molding to the inner surface, it is possible to mount and bind the annular transverse reinforcing bar 13, and the head reinforcing material is provided between the upper part of the head stiffener 12 and the lower part of the head stiffener 12d. (16) is to be latched by the inlet engaging jaw (12a) of the inlet annular end 11 of the steel pipe pile (10), the cross point groove ( 12b) was molded so that the lower bottom portion 12c of the head reinforcement material could be inserted into the steel pipe pile 10 by crossing a plurality of pieces by the intersecting groove 12b, basically three pieces per steel pipe pile 10. Tofu reinforcement (16) to each other Reinforcement work by making a difference, in the above, one of the three head reinforcement (16) crosses the top without forming the cross groove (12b) and the other two head reinforcement (16) has a difference in bending cross groove Inserting the annular formwork iron plate 14 into the upper part of the cross-bottom reinforcement lower side bottom part 12c by forming 12b and intersecting the largest one with the largest cross groove 12b at the bottom and then intersecting the size in the middle. It is to ensure a flat cross section in the mounting.

환형 거푸집 판(14)을 상기와 같이 설치하기 위해서 종래에는 강관말뚝(10) 상측 단 부에서 일정 하부지점에 걸림 턱 용접을 하여주거나 볼트 접합을 하는 등 의 번거로운 작업과정이 필요하였으나 ,본 발명은 몇 편의 일체형 두부보강재 (16)을 교차시켜 준 다음 환형 거푸집 철판(14)을 삽입하여 올려주기만 하면 된다.In order to install the annular formwork plate 14 as described above, in the prior art, a cumbersome work process such as welding a chin at a predetermined lower point at the upper end of the steel pipe pile 10 or bolting is required. After crossing several integral head stiffeners 16, it is only necessary to insert and raise the annular formwork iron plate 14.

도 2는 강관말뚝 두부보강재의 분해 사시 도를 나타내는바,두부보강재(16) 세 편을 교차시킨 후 교차 된 두부보강재 하측 저면 부(12c)위에 환형 거푸집 철판(14)을 올려놓은 다음, 강관말뚝(10) 내부로 삽입하여 주는데, 이때 두부보강재(16)의 입구 걸림 턱(12a)이 강관말뚝(10)의 입구 환형 단 부(11)에 걸 착 됨으로써 견고하게 결합이 되는 것으로,기존에는 두부보강재(16)을 강관말뚝(10)에 결속시키기 위하여 볼트 접합방식이나 용접 방식을 사용함으로 인하여 불필요한 재료비와 인력낭비 및 작업공정의 복잡화를 초래하였으나,상기와 같은 방법으로 기존의 문제점이 완전히 해소되었다.Figure 2 shows an exploded perspective view of the steel pipe pile tofu reinforcement bar, after placing three tofu reinforcement (16) cross-section to put the annular formwork iron plate (14) on the bottom bottom portion (12c) of the cross toes, steel pipe pile (10) It is inserted into the inside, in which the inlet engaging jaw (12a) of the head reinforcement (16) is firmly coupled to the inlet annular end 11 of the steel pipe pile (10), conventionally the head In order to bind the reinforcing material 16 to the steel pipe pile 10, the use of the bolt bonding method or the welding method causes unnecessary material cost, manpower waste, and complicated work process, but the existing problems are completely solved by the above method. .

상기와 같이 두부보강재(16)과 환형 거푸집 판(14)이 강관말뚝(10)과 일체로 결 착 된 다음에 두부보강재 상측 부(12)의 내면의 돌출 걸림 턱(12e)에 환형 횡 띠 철근(13)을 입구 걸림 턱(12a) 부위까지 결속용 띠 철선으로 결속하여 상측 환형 띠 철근 부(21)를 형성시키고 두부보강재 하측 부(12d)의 내면에도 상기의 환형 횡 띠 철근(13)보다 치수를 조금 좁게 하여 역시 결속용 띠 철선으로 결속하여 하측 환형 띠 철근 부(22)를 형성시킨 후,환형 거푸집 철판(14)의 상측 가장자리 부위에 환 형으로 천공된 다수 개의 종축 띠 철근 삽입 홈(24)에 일정 형상으로 양쪽 단 부를 구부린 종축 띠 철근(23)을 삽입하여 하측 환형 띠 철근 부(22)와 결속시키고 다시 상측 환형 띠 철근 부(21)와는 일정 공간 거리를 두면서 맨 상측 단 부의 환형 횡 띠 철근(13)에 구부린 종축 띠 철근(23)의 단 부를 결속시켜 줌으로써 띠 철근 조합체(20)의 결속이 완료되어 콘크리트를 타설하여 양생과정만 거치면 강관말뚝(10)의 두부 보강 작업이 완료될 수 있도록,강관말뚝(10)과 두부보강재(16) 및 띠 철근 조합체(10)를 상기에서 설명된 형상으로 제조하기 위한 방법에 관한 것이다.As described above, the head reinforcement member 16 and the annular formwork plate 14 are integrally bound to the steel pipe pile 10, and then the annular transverse reinforcing bars are formed on the protruding engaging jaw 12e of the inner surface of the head reinforcement upper portion 12. (13) is bound to the inlet engaging jaw (12a) by the binding band iron wire to form an upper annular band reinforcing bar portion 21, and to the inner surface of the lower part of the head reinforcement (12d) than the above annular transverse band bar (13) After narrowing the dimension a little, the bottom annular band reinforcing bar portion 22 was formed by binding with a banding wire for binding, and then a plurality of longitudinal band reinforcing bar insertion holes were formed in the upper edge of the annular form iron plate 14 in an annular shape. 24) insert a longitudinal band reinforcing bar 23 having both ends bent in a predetermined shape to bind with the lower annular band reinforcing bar 22, and again place a certain space distance from the upper annular band reinforcing bar 21, and annular the upper end part. Longitudinal belt reinforcing bars bent to transverse band reinforcing bars (13) By binding the end of 23), the binding of the band reinforcing bar assembly 20 is completed, and the concrete reinforcement process can be completed when the head reinforcement work of the steel pipe pile 10 is completed, and the steel pipe pile 10 and the head reinforcement are completed. (16) and the band reinforcing bar assembly 10 in the shape described above.

도 1은 강관말뚝 두부보강구조의 결속 단면도,1 is a cross-sectional view of the steel pipe pile head reinforcement structure,

도 2는 강관말뚝과 두부보강재 및 띠 철근 조합체의 분리 사시도.Figure 2 is an exploded perspective view of the steel pipe pile and the head reinforcement and strip reinforcement assembly.

〈도면의 주요 부분에 대한 부호의 설명 〉<Explanation of symbols on the main parts of the drawing>

(10)ㅡ 강관말뚝 (11)ㅡ 입구 환형 단부(10) ㅡ steel pipe pile (11) ㅡ inlet annular end

(12)ㅡ 두부보강재 상측부 (12a)ㅡ 입구 걸림턱(12) ㅡ upper part of tofu reinforcement (12a) ㅡ entrance locking jaw

(12b)ㅡ 교차 홈 (12c)ㅡ 두부보강재 하측 저면부(12b) ㅡ cross groove (12c) ㅡ bottom of tofu reinforcement

(12d)ㅡ 두부보강재 하측부 (14)ㅡ 환형 거푸집 철판(12d) ㅡ lower part of tofu reinforcement (14) ㅡ round form iron plate

(15)ㅡ 기초하면 주 철근 (16)ㅡ 두부보강재(15) ㅡ Based steel reinforcing bars (16) ㅡ Tofu reinforcement

(20)ㅡ 띠 철근 조합체 (21)ㅡ 상측 환형 띠 철근부(20) ㅡ Strip reinforcing bar assembly (21) ㅡ Upper annular band reinforcing bar

(22)ㅡ 하측 환형 띠 철근부 (23)ㅡ 종축 띠 철근(22) ㅡ Lower annular band rebar (23) ㅡ Longitudinal band rebar

(24)ㅡ 종축 띠 철근 삽입홈(24) ㅡ Longitudinal belt reinforcement slot

Claims (2)

콘크리트 건축구조물의 기초지반 강화작업에 있어서,강관말뚝(10)을 안정지반까지 박아서 고정한 다음에 돌출 걸림 턱(12e)이 내측부에 구비된 두부보강재 상측 부(12)와 두부보강재 하측 부(12d) 및 교차 홈(12b)이 형성된 두부보강재 하측 저면 부(12c)가 일체형인 두부보강재(16)을 제조하여 다수 개를 서로 교차 홈(12b)에 의해 교차 되도록 하여,강관말뚝(10)의 상측 단 부의 입구 내부로 두부보강재(16)의 입구 걸림 턱(12a)이 강관말뚝(10)의 입구 환형 단 부 (11)에 걸 착 될 때까지 삽입한 후,종축 띠 철근 삽입 홈(24)이 다수 개 구비된 환형 거푸집 철판(14)을 안치한 후,환형 횡 띠 철근(13)과 종축 띠 철근(23)을 차례로 결속하여 띠 철근 조합체(20)를 형성하여 두부보강재(16)과 결속시켜 콘크리트 타설 및 양생 작업을 통한 지반강화작업을 편리하고 신속하게 실행하기 위한 강관말뚝(10) 과 두부보강재(16)의 제조방법.In the foundation ground reinforcement work of concrete building structure, the steel pipe pile 10 is driven and fixed to the stable ground, and then the head reinforcement upper part 12 and the head reinforcement lower part 12d having the protruding locking jaw 12e are provided on the inner side. ) And the head reinforcement lower side bottom portion 12c having the cross recess 12b formed therein to manufacture an integral head reinforcement 16 so that a plurality of them cross each other by the cross groove 12b, and the upper side of the steel pipe pile 10. After the inlet engaging jaw 12a of the head reinforcement 16 is engaged with the inlet annular end 11 of the steel pipe pile 10, the longitudinal band reinforcing bar 24 is inserted into the inlet of the end. After placing a plurality of annular formwork iron plate (14), the annular transverse reinforcing bar 13 and the longitudinal axis reinforcing bar (23) in turn to form a band reinforcing bar assembly (20) to bind the head reinforcement (16) concrete Convenient and quick execution of ground reinforcement work through pouring and curing work Method for producing a steel pipe pile 10 and the head reinforcement 16 for group. 제 1항에 있어서 두부보강재(16)을 제조하는 방식을,내측 부에 다수 개의 돌출 걸림 턱(12e)과 중간 부위에 입구 걸림 턱(12a)과 저면 부에 하측 방향 교차 홈(12b)이 형성되도록 하여 하나의 일체형으로 제작하여 다수 개 교차 및 삽입하는 방식에 의하여 볼트접합이나 용접 등의 접합방법이 필요없는 두부보강재(16)의 제조방법.The method of manufacturing the head reinforcing material 16 according to claim 1, wherein a plurality of protruding locking jaw (12e) in the inner portion, the inlet locking jaw (12a) in the middle portion and the lower crossover groove (12b) is formed in the bottom portion The method of manufacturing the head reinforcement (16) is made in one integral type so that a plurality of crossing and insertion method does not require a joining method such as bolting or welding.
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CN105714760A (en) * 2016-01-29 2016-06-29 上海长凯岩土工程有限公司 Filler-free vibro-compaction foundation treatment method
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CN105714760A (en) * 2016-01-29 2016-06-29 上海长凯岩土工程有限公司 Filler-free vibro-compaction foundation treatment method
CN115354898A (en) * 2022-08-24 2022-11-18 机械工业勘察设计研究院有限公司 Ancient building vibration control device
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