KR20150040588A - Reinforced direct boring attached imbedded bit at head steelpipe and one shot grouting in tunneling method - Google Patents

Reinforced direct boring attached imbedded bit at head steelpipe and one shot grouting in tunneling method Download PDF

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KR20150040588A
KR20150040588A KR20130119294A KR20130119294A KR20150040588A KR 20150040588 A KR20150040588 A KR 20150040588A KR 20130119294 A KR20130119294 A KR 20130119294A KR 20130119294 A KR20130119294 A KR 20130119294A KR 20150040588 A KR20150040588 A KR 20150040588A
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steel pipe
grouting material
grouting
pipe
partitioning
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KR101580961B1 (en
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최제인
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선명건설 주식회사
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • 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
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/003—Injection of material
    • 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
    • E02D5/62—Compacting the soil at the footing or in or along a casing by forcing cement or like material through tubes

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

The present invention relates to an apparatus and a method for simultaneously injecting a direct boring steel pipe for reinforcing a tunnel. A partition member (30), which is formed at a distance in order to make a front end portion side of a steel pipe (10) where multiple discharge grooves (11) are penetrated, and multiple divided chambers (20, 21, 22, 23) inside, fixes both sides of the partition member (30) with a stopper washer (50) by being connected to grouting re-injecting pipes (40, 41, 42, 43) which inject a grouting material. The partition member has an insertion groove (30a) in order to insert a rubber packing (60) to be fixedly installed on the external circumferential surface of the partition member (30), and horizontally forms multiple protrusions (60a) not to make the grouting material be leaked to other divided chambers by fixing as being tightly connected to an internal side of the steel pipe (10) on the external circumferential surface of the rubber packing (60). The partition member has a sealing member (31) and an end cover (70) in a rear end portion of the steel pipe (10), and has a bit (80) in a front end portion.

Description

터널 보강용 직천공 강관 동시 주입장치 및 주입공법{Reinforced direct boring attached imbedded bit at head steelpipe and one shot grouting in tunneling method}Technical Field [0001] The present invention relates to a method of simultaneously injecting a straight pipe of a steel pipe for tunnel reinforcement,

본 발명은 터널 보강용 직천공 강관 동시 주입장치 및 주입공법에 관한 것으로, 더욱 상세하게는 석탄층이나 모래자갈층과 같이 천공홀이 붕괴되는 지층에 주입강관의 선단에 매몰비트를 장착하여 천공하면서 강관을 삽입하는 방법이고, 또 터널의 굴착에 앞서 굴착 지반의 지지력(전단력)을 강화시켜 터널의 안정성을 유지하고, 지반 내에 함유된 지하수의 차단과 굴착면의 낙반과 여굴의 방지에 의한 굴착면의 안정성을 높이기 위해 시공하는 직천공 관입의 설치를 가능케 하면서도 강관 내부에 칸막이부재에 의해 형성되는 구획공간에 그라우팅재를 동시에 주입하여 주입시간을 단축시키고, 주입된 그라우팅재의 누출을 방지할 수 있게 함은 물론 그라우팅을 통해 지지력을 향상시키기 위한 것이다.More particularly, the present invention relates to a method of simultaneously injecting a steel pipe into a steel pipe by puncturing a buried bit at the tip of an injection steel pipe in a stratum such as a coal layer or a sand gravel layer where a perforation hole collapses, And the stability of the tunnel is maintained by strengthening the supporting force (shearing force) of the excavation ground prior to excavation of the tunnel, and the stability of the excavation surface due to the interruption of groundwater contained in the ground, The grouting material can be simultaneously injected into the partition space formed by the partitioning member in the steel pipe to shorten the injection time and to prevent leakage of the grouting material injected, This is to improve the bearing capacity through grouting.

일반적으로 그라우트(Grout) 또는 그라우팅(Grouting)이라 함은 토목공사에서 터널 등을 시공할 때 굴착지반의 지지력을 강화시켜주거나 누수방지공사 및 토질안정 등을 위하여 지반의 갈라진 틈, 공동 등에 충전재를 주입하는 것을 말하며, 그 충전재('그라우팅재'라고도 함)는 중력이나 펌프를 이용하여 충전한다.Generally, grouting or grouting refers to a method of strengthening the supporting capacity of excavated soil when constructing tunnels in civil engineering works, injecting filler into cracks and cavities in the ground, The filling material (also referred to as "grouting material") is charged using gravity or a pump.

이러한 그라우팅 공법은 강관을 지반에 설치하고 그 강관의 내측으로 패커를 설치하여 그라우팅재를 주입하여 고결시킴으로써 강관과 지반을 일체로 만들고 토질, 암반의 전단강도를 증대시키는 역할을 하며 주입을 강관 속에서 수행하므로 시공성, 경제성 측면에서 매우 유리한 공법이다.Such a grouting method is to install a steel pipe on the ground, packer is installed on the inside of the steel pipe, grouting material is poured into it, and the steel pipe and the ground are integrated and the soil and the shear strength of the rock are increased. It is very advantageous in terms of workability and economy.

통상, 강관 그라우팅 공법은 연약 지반을 천공하는 단계, 천공홀에 스트레이너가 설치된 강관을 삽입하는 단계, 강관과 천공홀 사이에 실링재를 투입하는 단계 및 패커를 설치하면서 시멘트를 주입하는 단계로 이루어진다.Generally, the steel pipe grouting method comprises a step of perforating a soft ground, a step of inserting a steel pipe with a strainer in a perforation hole, a step of injecting a sealing material between a steel pipe and a perforation hole, and a step of injecting cement while installing a packer.

그러나, 이러한 방법은 천공 후 강관을 삽입하기 때문에 천공홀이 유지되기 힘든 연약한 토사지반에서는 천공홀의 무너짐, 이물질의 혼입 등으로 강관의 삽입을 어렵게 하여 실용성이 떨어진다.However, in this method, since the steel pipe is inserted after the drilling, in a soft soil layer where the drilling hole is difficult to maintain, it is difficult to insert the steel pipe due to collapse of the perforation hole and foreign matter.

이러한 문제점을 해결하기 위해 천공과 동시에 강관을 삽입하는 직천공 장치/방법이 제안되고 있다.To solve this problem, a direct punching apparatus / method for inserting a steel pipe at the same time as a perforation has been proposed.

도 1은 종래의 직천공 장치의 요부인 강관의 구성을 나타낸 것이다. 상기 직천공 장치는 스트레이너(2)가 장착된 강관(1) 선단부 내주면에 암나사 가공이 되어 외주면에 수나사 가공된 천공비트(4)와 나사 체결하게 되는 구성으로 되어 있다.1 shows a structure of a steel pipe which is a main part of a conventional direct perforator. The above-described direct-perforating device is configured such that the inner peripheral surface of the front end of the steel pipe 1 on which the strainer 2 is mounted is female-threaded, and is screwed to the perforated bit 4,

그러나 이러한 종래의 직천공 장치는 강관(1)의 내부에 그라우팅재를 주입하기 위하여 강관 선단부에 에어패커로 패킹을 하고 주입하면, 선단부 비트를 통하여 인접 천공홀로 그라우팅재가 주입되어 이탈되는 현상이 발생하여 인접홀 시공시 문제가 발생하였던 것이다.However, in such a conventional direct punching apparatus, when grouting material is injected into the steel pipe 1, the grouting material is injected into the adjacent perforation hole through the tip bit, There was a problem in constructing adjacent holes.

그리고 도 2에 나타내는 바와 같이, 특허등록 제 10-0776304호의 "직천공 동시 주입장치"가 개시되었으나, 직천공 비트 인접부분에 칸막이가 없어 비트 선단으로 그라우팅재의 누출이 되어 인접 홀로 유입되는 문제점이 있고, 또 이를 방지하기 위하여 중간칸막이를 1개 더 설치하는데 이중으로 칸막이 설치가 되어야 함은 물론, 그라우팅재 주입관 또한 2개씩 설치가 되므로 경제성이 떨어지는 문제점이 있었다.As shown in FIG. 2, although the "straight hole boring device" of Patent Registration No. 10-0776304 is disclosed, there is a problem that the grouting material leaks to the bit end and flows into the adjacent hole because there is no partition at the portion adjacent to the straight boring bit In order to prevent this, one intermediate partition is installed. In addition to this, it is necessary to install a partition. In addition, since two grouting reinjection tubes are installed, the economical efficiency is low.

또한, 상기 구성은 강관의 하부에는 그라우팅재를 주입하고, 상부에는 급결주입재를 주입하는 구성으로, 먼저 강관의 상부에 급결주입제를 주입하여 패커부재의 팽창으로 강관 내부에 구획을 형성한 후, 2차적으로 그라우팅재를 주입하는 방법으로, 공사시간이 많이 소요됨은 물론 급결주입제와 그라우팅재 2개를 사용하여야 하기 때문에 시공비가 더 많이 소요되는 문제점이 있었던 것이다.In the above construction, grouting material is injected into the lower part of the steel pipe, and rapid injection material is injected into the upper part of the steel pipe. The injection material is injected into the upper part of the steel pipe first to form a compartment inside the steel pipe, As a method of injecting grout material secondarily, it takes a lot of construction time and requires the use of two injection grout and grouting material, which causes a problem that the construction cost is increased.

1. 국내 특허등록 제 10-0776304호1. Korean Patent Registration No. 10-0776304

2. 국내 특허등록 제 10-1115783호 2. Domestic patent registration No. 10-1115783

3. 국내 특허등록 제 10-0772684호3. Korean Patent Registration No. 10-0772684

본 발명은 상기와 같은 문제점을 해결하기 위하여 창출한 것으로, 석탄층이나 모래자갈층과 같이 천공홀이 붕괴되는 지층의 상부에 위치한 구조물의 하부에 터널 또는 지중구조물을 설치하기 위하여, 지반의 굴착에 앞서 굴착지반의 지지력을 강화시켜 구축되는 구조물의 안정성을 강화시키거나 또는 지반 내에 함유된 지하수의 차단과 굴착면의 낙반과 여굴의 방지에 의한 굴착면의 안정성을 높이기 위하여, 지반에 매몰되는 강관의 내부에 그라우팅재 주입관을 삽입하고, 상기 그라우팅재 주입관에 장착된 다수개의 칸막이부재에 의해 형성되는 각 구획실로 그라우팅재주입관을 통해 그라우팅재를 동시에 주입하여 주입시간을 단축할 수 있도록 함을 목적으로 한다.The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a tunnel or an underground structure at the lower part of a structure located at an upper part of a stratum such as a coal layer or a sand gravel layer, In order to enhance the stability of the structure constructed by strengthening the bearing capacity of the ground or to increase the stability of the excavation surface by blocking groundwater contained in the ground and preventing fallout and excavation of the excavation surface, It is an object of the present invention to provide a grouting re-injection tube which is capable of simultaneously injecting a grouting material into grooves formed by a plurality of partition members mounted on the grouting material injection tube, .

또한, 본 발명은 강관의 후단부를 밀폐부재와 엔드커버로 마감하였기 때문에, 강관의 내부에 주입되는 그라우팅재가 외부로 누출되지 않도록 하는데에도 그 목적이 있는 것이다.The present invention is also intended to prevent the grouting material injected into the steel pipe from leaking to the outside because the rear end of the steel pipe is closed with the sealing member and the end cover.

그뿐만 아니라 강관의 선단부측에 밀폐캡을 장착하여 강관으로 주입되는 그라우팅재가 선단부측에서도 누출되는 것을 방지할 수 있도록 함을 목적으로 한다.And it is an object of the present invention to prevent the grouting material, which is injected into the steel pipe, from leaking from the front end side by attaching a sealing cap to the front end side of the steel pipe.

상기와 같은 목적을 갖는 본 발명의 구성을 첨부된 도면에 의거하여 상세하게 설명하면 다음과 같다.
BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

본 발명은 도 3에 나타내는 바와 같이, 선단부에 비트(80)가 장착된 강관(10)의 외주면에 다수개의 배출공(11)을 천공하여 형성하고, 상기 강관(10)의 내부에 삽입되어 다수개의 구획실(20)(21)(22)(23)을 형성하기 위해 간격을 두고 형성되는 칸막이부재(30)는 그라우팅재를 주입하는 그라우팅재주입관(40)(41)(42)(43)과 각각 결합하고, 상기 칸막이부재(30)의 상부면과 하부면을 스토퍼와셔(50)로 고정하고, 상기 칸막이부재(30)의 가장자리에 형성된 삽입홈(30a)에 러버패킹(60)을 삽입하여 고정되게 형성하고, 상기 러버패킹(60)의 외주면에 형성된 다수개의 돌기(60a)는 강관(10)의 내부면에 밀착하여 고정하면서 그라우팅재가 다른 구획실(20)(21)(22)(23)로 누출되지 못하도록 형성하고, 강관(10)의 후단부에는 밀폐부재(31)와 앤드커버(70)를 장착하여 구성한 것을 특징으로 한다.3, a plurality of discharge holes 11 are formed in the outer peripheral surface of a steel pipe 10 to which a bit 80 is attached at a tip end thereof, and the plurality of discharge holes 11 are inserted into the steel pipe 10, The partitioning member 30 formed at intervals to form the division chambers 20, 21, 22 and 23 has grouting receiving pipes 40, 41, 42 and 43 for injecting the grouting material, The upper and lower surfaces of the partitioning member 30 are fixed by the stopper washer 50 and the rubber packing 60 is inserted into the insertion groove 30a formed at the edge of the partitioning member 30 And a plurality of protrusions 60a formed on the outer circumferential surface of the rubber packing 60 are fixed to the inner surface of the steel pipe 10 while the grouting material is fixed to the other compartments 20, 21, 22, And the sealing member 31 and the end cover 70 are attached to the rear end of the steel pipe 10 The.

상기와 같은 특징을 갖는 본 발명은 석탄층이나 모래자갈층과 같이 천공홀이 붕괴되는 지층의 상부에 위치한 구조물의 하부를 통과하는 터널형성 및 상부 구조물을 안전하게 지지하기 위하여 지반의 굴착작업에 앞서 매몰 비트를 이용한 직천공 강관 공법으로 강관에 그라우팅재를 주입할 때, 강관 내부의 칸막이부재에 의해 구획된 다수개의 구획실로 그라우팅재주입관을 통해 그라우팅재를 동시에 주입할 수 있음은 물론 다른 구획실로 그라우팅재가 누출되지 않도록 하였기 때문에, 그라우팅재의 주입시간을 단축할 수 있는 효과가 있다.The present invention having the above-mentioned characteristics is characterized in that a tunnel passing through a lower part of a structure located on an upper part of a stratum such as a coal layer or a sand gravel layer is crushed, and a buried bit is formed before a digging operation of the ground to securely support the upper structure. When the grouting material is injected into the steel pipe by using the perforated steel pipe method, the grouting material can be simultaneously injected into the plurality of compartment divided by the partitioning member in the steel pipe, and the grouting material does not leak into the other compartment Therefore, the injection time of the grouting material can be shortened.

또한, 강관의 후단부에는 밀폐부재와 앤드캡이 장착되어 있기 때문에, 그라우팅재주입관으로 주입된 그라우팅재는 강관의 외부로 누출되는 것을 방지할 수 있는 효과가 있다. Further, since the sealing member and the end cap are attached to the rear end of the steel pipe, the grouting material injected into the grouting pipe can be prevented from leaking to the outside of the steel pipe.

도 1은 종래의 직천공 강관 동시 주입장치를 나타낸 실시 예 도면이고,
도 2는 종래의 직천공 강관 동시 주입장치를 나타낸 또 다른 실시 예 도면이고,
도 3은 본 발명에 따른 직천공 강관 동시 주입장치를 나타낸 단면도이고,
도 4는 본 발명에 따른 강관의 내부를 다수개의 구획실로 구획하기 위한 칸막이부재와 결합된 러버패킹을 확대하여 나타낸 단면도이고,
도 5는 본 발명에 따른 강관의 후단부에 장착되는 밀폐부재와 앤드캡을 확대하여 나타낸 단면도이다.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an embodiment of a conventional direct perforated steel pipe simultaneous injection apparatus,
2 is a view showing still another embodiment of a conventional direct perforated steel pipe simultaneous injection apparatus,
FIG. 3 is a cross-sectional view of a simultaneous perforated steel pipe injection apparatus according to the present invention,
4 is an enlarged cross-sectional view of a rubber packing combined with a partition member for partitioning the inside of a steel pipe into a plurality of compartments according to the present invention,
5 is an enlarged cross-sectional view of a sealing member and an end cap mounted on a rear end portion of a steel pipe according to the present invention.

이하, 본 발명에 따른 직천공 강관 동시 주입장치 및 주입공법에 대한 바람직한 실시 예에 대하여 첨부된 도면들을 참조로 하여 상세히 설명한다.
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a preferred embodiment of the simultaneous injection apparatus and injection method according to the present invention will be described in detail with reference to the accompanying drawings.

본 발명은 도 3에 나타내는 바와 같이, 선단부에 비트(80)가 장착된 강관(10)의 내부에 간격을 두고 다수개의 칸막이부재(30)가 장착된 그라우팅재주입관(40)(41)(42)(43)을 삽입하여 다수개의(본 발명의 도면에서는 4개를 형성함) 구획실(20)(21)(22)(23)이 형성되게 현장에서 조립하여, 비트(80)로 지반을 천공하면서 강관(10)을 지반에 매몰하고, 지반에 매몰된 강관(10)의 내부에 그라우팅재주입관(40)(41)(42)(43)을 통해 그라우팅재를 동시에 주입하도록 함으로써, 주입시간을 단축할 수 있도록 함과 동시에 그라우팅재에 의한 지반의 고결로 강관과 지반을 일체로 만들고 토질, 암반의 전단강도를 증대시키도록 하기 위한 구성이다.
3, a grouting re-entry pipe 40 (41) 42 (42) having a plurality of partitioning members (30) mounted at intervals in the interior of a steel pipe (10) 22 and 23 are formed by inserting a plurality of holes 43 to form a plurality of (forming four in the drawings of the present invention) The grouting material is buried in the ground and the grouting material is simultaneously injected into the steel pipe 10 buried in the ground through the grouting material receiving pipes 40, 41, 42 and 43, So that the steel pipe and the ground can be made integral by the cementation of the ground by the grouting material and the shear strength of the soil and the rock can be increased.

상기 구성을 보다 구체적으로 설명하면, 먼저 강관(10)의 선단부측에는 비트(80)를 장착하고, 상기 비트(80)를 이용하여 연약한 지반을 천공하면서 강관(10)을 연약지반에 매몰할 수 있도록 구성한다.
The bit 80 is firstly mounted on the tip end side of the steel pipe 10 and the steel pipe 10 is buried in the soft ground while puncturing the soft ground using the bit 80. [ .

이때 강관(10)의 내부에는 이미 공장에서 조립하여 현장으로 반출된 다수개의 칸막이부재(30)를 장착한 그라우팅재주입관(40)(41)(42)(43)을 현장에서 삽입하여 조립하였기 때문에, 다수개의 칸막이부재(30)에 의해 다수개의 구획실(20)(21)(22)(23)이 강관의 내부에 구성되어 있다.At this time, the grouting re-entrainment pipes 40, 41, 42 and 43 equipped with the plurality of partition members 30 already assembled at the factory and carried to the site were assembled by inserting in the field in the steel pipe 10 A plurality of compartments 20, 21, 22, and 23 are formed in the interior of the steel pipe by a plurality of partition members 30.

즉, 강관(10)의 맨 하부측 구획실(20)에 형성되는 그라우팅재주입관(40)에 다수개의 칸막이부재(30)를 일정한 간격을 두고 결합하고, 상기 칸막이 부재 상부면과 하부면에 각각 스토퍼와셔(50)로 고정하고, 또 다른 그라우팅 주입관(41)(42)(43)을 각 구획실(21)(22)(23)을 형성하고 있는 칸막이부재(30)의 외주면에 결합하여 구성한다.
That is, a plurality of partitioning members 30 are coupled to the grouting re-entrainment pipe 40 formed in the lower-most side partition 20 of the steel pipe 10 at a predetermined interval, And the other grouting injection pipes 41, 42 and 43 are fixed to the outer peripheral surface of the partitioning member 30 forming the division spaces 21, 22 and 23 .

그리고 상기 그라우팅재주입관(40)(41)(42)(43)을 강관(10)의 내부에 삽입하게 되면, 강관(10)의 내부는 그라우팅재주입관(40)(41)(42)(43)에 결합된 칸막이부재(30)에 의해 다수개의 구획실(20)(21)(22)(23)이 형성되는 것이다.
When the grouting reinforcement pipes 40, 41, 42 and 43 are inserted into the steel pipe 10, the inside of the steel pipe 10 is inserted into the grouting pipe 40, 41, 42 and 43 21, 22, and 23 are formed by the partitioning members 30 coupled to the partitioning members 30,

즉, 상기 그라우팅재주입관(40)은 간격을 두고 장착되는 칸막이부재(30)의 내부 중앙에 형성된 삽입구(33)를 통해 삽입하고, 나머지 그라우팅재주입관(41)(42)(43)은 도 3의 평면도에 나타내는 바와 같이, 시계방향으로 칸막이부재(30)의 중앙 삽입구(33)의 외주면으로 형성되는 삽입구(34)(35)(36)에 삽입하여 고정하면 된다.
That is, the grouting reinforcement pipe 40 is inserted through the insertion hole 33 formed at the center of the inside of the partitioning member 30 which is installed at intervals, and the remaining grouting reinforcement pipes 41, 42, 35 and 36 formed in the outer peripheral surface of the central insertion opening 33 of the partitioning member 30 in the clockwise direction as shown in the plan view of FIG.

그리고 각 구획실(20)(21)(22)(23)의 내부로 그라우팅재를 주입하기 위해서는 각각의 그라우팅재주입관(40)(41)(42)(43)을 칸막이부재(30)의 저면에 돌출하여 형성한다. 이때 맨 하부측의 구획실(20)에 형성되는 그라우팅재주입관(40)의 단부측은 밀폐캡(90)으로 밀폐시켜주고, 맨 하부측 구획실(20)에 삽입된 그라우팅재주입관(40)의 외주면에 다수개의 통공(40a)을 천공하여 그라우팅재가 맨 하부측의 구획실(20)에 주입되도록 구성한다.
In order to inject the grouting material into the interior of each of the division chambers 20, 21, 22 and 23, the grouting material inlet pipes 40, 41, 42 and 43 are provided on the bottom surface of the partitioning member 30 . At this time, the end side of the grouting re-take-in pipe 40 formed in the bottom compartment 20 is sealed by the sealing cap 90 and the outer circumferential surface of the grouting re-take-in pipe 40 inserted into the bottom- A plurality of through holes 40a are drilled so that the grouting material is injected into the compartment 20 at the bottom of the bottom.

그뿐만 아니라 칸막이부재(30)는 도 4에 나타내는 바와 같이, 사출품이나 강화고무로 형성하되 강관(10)의 내부면과 밀착하여 각 구획실(20)(21)(22)(23)에 주입되는 그라우팅재를 다른 구획실(20)(21)(22)(23)로 누출되지 못하도록 러버패킹(60)이 칸막이부재(30)의 외주면에 결합하도록 구성한다.
4, the partitioning member 30 is formed of a product of injection or reinforced rubber and is in close contact with the inner surface of the steel pipe 10 to be injected into the compartments 20, 21, 22, The rubber packing 60 is connected to the outer circumferential surface of the partitioning member 30 so that the grouting material is prevented from leaking to the other partitioning spaces 20, 21, 22,

즉, 칸막이부재(30)의 외주면에 형성된 삽입홈(30a)에 러버패킹(60)의 일측을 삽입하여 고정한다. 또한, 러버패킹(60)의 또 다른 일측에는 수평으로 돌출한 돌기(60a)를 다수개 형성하여 강관(10)의 내부면과 밀착되게 구성한다. 따라서 수평으로 돌출하는 다수개의 돌기(60a)에 의해 구획실(20)(21)(22)(23)로 주입되는 그라우팅재는 다른 구획실(20)(21)(22)(23)로 누출되지 않게 되는 것이다.
That is, one side of the rubber packing 60 is inserted into the insertion groove 30a formed in the outer peripheral surface of the partitioning member 30 and fixed. A plurality of horizontally protruding protrusions 60a are formed on the other side of the rubber packing 60 so as to be in intimate contact with the inner surface of the steel pipe 10. Accordingly, the grouting material injected into the compartments 20, 21, 22, and 23 by the plurality of projections 60a projecting horizontally is not leaked to the other compartments 20, 21, 22, will be.

또한, 강관(10)의 각 구획실(20)(21)(22)(23)에 주입된 그라우팅재가 연약한 지반으로 유입될 수 있게 각 구획실(20)(21)(22)(23)의 외주면 다수개의 배출공(11)이 천공되어 있고, 이들 배출공(11)은 각각 상, 하, 좌, 우 방향으로 천공하여 사방으로 배출되게 함으로써, 연약한 지반에 그라우팅재가 골고루 주입될 수 있도록 구성한다.
A plurality of outer circumferential surfaces of each of the compartments 20, 21, 22, and 23 are provided so that the grouting material injected into the respective compartments 20, 21, 22, and 23 of the steel pipe 10 can be introduced into the soft ground. The discharge holes 11 are perforated in the upper, lower, left, and right directions, respectively, so that the grouting material can be uniformly injected into the fragile ground.

그뿐만 아니라 도 5에 나타내는 바와 같이, 상기 강관(10)의 후단부측에는 밀폐부재(31)를 강관(10)의 내부측에 삽입하여 밀폐부재(31)와 각 구획실(20)(21)(22)(23)에 형성되는 그라우팅재주입관(40)을 서로 용접(32)하고, 나머지 그라우팅재주입관(41)(42)(43)에는 오링(41a)을 설치하여 밀폐와 동시에 움직이지 않도록 고정되게 구성하고, 또 구획실(20)(21)(22)(23)에 주입된 그라우팅재가 외부로 누출되는 것을 미연에 1차적으로 방지하기 위하여 밀폐부재(31)의 외주면에 형성된 삽입홈(31a)에 오링(100)을 삽입하여 구성한다.
5, the sealing member 31 is inserted into the inner side of the steel pipe 10 at the rear end side of the steel pipe 10 to seal the sealing member 31 and each of the compartments 20, 21 ( 22) 23 are welded to each other while the remaining grouting material receiving holes 41, 42, 43 are provided with an O-ring 41a so as to be fixed And the grooves 31a formed in the outer circumferential surface of the sealing member 31 to prevent the grouting material injected into the compartments 20, 21, 22, and 23 from leaking out to the outside, And the O-ring 100 is inserted into the O-ring.

또한, 그라우팅재 주입시 주입압력에 밀폐부재가 빠지지 않도록 강관(10)의 후단부 외부면에 앤드커버(70)를 삽입하여 고정되게 구성한다.
In addition, the end cover 70 is inserted and fixed to the outer surface of the rear end of the steel pipe 10 so as to prevent the sealing member from being poured into the injection pressure when injecting the grouting material.

상기 구성에 의한 본 발명의 실시 예에 의한 시공방법을 도 1을 통해 상세하게 설명하면 다음과 같다.
The construction method according to the embodiment of the present invention will be described in detail with reference to FIG.

본 발명은 도 1에 나타내는 바와 같이, 석탄층이나 모래자갈층과 같이 천공홀이 붕괴되는 지층의 상부에 위치한 구조물의 하부에 터널 또는 지중구조물을 설치하기 위하여 지반의 굴착에 앞서 굴착지반의 지지력(전단력)을 강화시켜 구축되는 구조물의 안정성을 강화시키거나 또는 지반 내에 함유된 지하수의 차단과 굴착면의 낙반과 여굴의 방지에 의한 굴착면의 안정성을 높이기 위하여 그라우팅시공을 한다.
As shown in FIG. 1, in order to install a tunnel or an underground structure in a lower part of a structure located on an upper part of a stratum such as a coal layer or a sand gravel layer, the supporting force (shear force) To strengthen the stability of the structure to be built or to prevent the groundwater contained in the ground and to prevent slope failure and excavation of the excavation surface to improve the stability of the excavation surface.

상기 지반에 본 발명에 따른 장치를 이용하여 그라우팅재를 주입하기 위해서는 공장에서 미리 주입배관 셋트를 조립한다. 여기서 주입배관 셋트는 강관(10)의 선단부에는 비트(80)가 장착되어 있고, 또 그라우팅재주입관(40)(41)(42)(43)에는 다수개의 칸막이부재(30)가 장착되어 있는 것이다.
In order to inject the grouting material into the ground using the apparatus according to the present invention, the injection piping set is assembled in the factory in advance. Here, in the injection piping set, a bit 80 is attached to the tip end of the steel pipe 10, and a plurality of partition members 30 are attached to the grouting receiving pipes 40, 41, 42 and 43 .

상기와 같이 비트(80)가 장착된 강관(10)의 내부에 다수개의 칸막이부재(30)가 장착된 그라우팅재주입관(40)(41)(42)(43)(43)을 현장에서 조립하여 연약한 지반을 비트(80)가 천공해가면서 강관(10)을 지반에 매몰하게 되는 것이다.The grouting re-entrainment pipes 40, 41, 42, 43, and 43, in which the plurality of partition members 30 are mounted, are assembled in situ in the interior of the steel pipe 10 equipped with the bit 80 as described above The steel pipe 10 is buried in the ground while the bit 80 penetrates the weak ground.

이때 강관(10)의 내부에는 칸막이부재(30)에 의해 다수개의 구획실이 형성되어 있고, 각 구획실(20)(21)(22)(23)에는 그라우팅재주입관(40)(41)(42)(43)(43)이 결합되어 있기 때문에, 상기 그라우팅재주입관(40)(41)(42)(43)(43)을 통해 각 구획실(20)(21)(22)(23)에 그라우팅재가 동시에 주입되는 것이다.
At this time, a plurality of compartments are formed inside the steel pipe 10 by the partitioning member 30, and the grouting arelands 40, 41, and 42 are formed in the compartments 20, 21, 22, The grouting material is supplied to each of the compartments 20, 21, 22, and 23 through the grouting arelands 40, 41, 42, 43 and 43, It is injected at the same time.

상기와 같이 강관(10)의 내부에 형성되는 각 구획실(20)(21)(22)(23)에 그라우팅재를 동시에 주입하기 위하여 강관(10)에 주입배관 셋트를 조립하기 위한 방법에 대하여 설명하면,
As described above, a method for assembling an injection piping set to a steel pipe 10 for simultaneously injecting a grouting material into each of the compartments 20, 21, 22, and 23 formed in the steel pipe 10 if,

강관(10)의 하부측에 구획실(20)을 형성하기 위해 가장 긴 그라우팅재주입관(40)의 단부측을 밀폐캡(90)으로 밀폐시킨 다음, 간격을 두고 그라우팅재주입관(40)에 칸막이부재(30)를 다수개 결합한다. 이때 상기 칸막이부재(30)의 상부면과 하부면에는 스토퍼와셔(50)로 그라우팅재주입관(40) 고정하여 움직이지 않도록 한다.
The end portion of the longest grouting material 40 having the longest length is closed with the sealing cap 90 in order to form the division chamber 20 on the lower side of the steel pipe 10, (30). At this time, the grouting material 40 is fixed to the upper surface and the lower surface of the partitioning member 30 by the stopper washer 50 so as not to move.

또한, 상기 칸막이부재(30)의 삽입홈(30a)에는 다수개의 돌기(60a)를 수평으로 돌출하여 형성한 러버패킹(60)을 삽입하여 고정한다.
A rubber packing 60 formed by horizontally protruding a plurality of projections 60a is inserted and fixed in the insertion groove 30a of the partitioning member 30.

그뿐만 아니라 상기 그라우팅재주입관(40)에 간격을 두고 형성된 칸막이부재(30)의 외주면을 따라 시계방향으로 나머지 그라우팅재주입관(41)(42)(32)을 하부측에서 상부측으로 갈수록 긴 순서대로 결합한다.
In addition, the remaining grouting receiving tubes 41, 42 and 32 are formed in a clockwise direction along the outer circumferential surface of the partitioning member 30 formed at intervals in the grouting receiving tube 40 in a descending order from the lower side to the upper side .

그리고 현장에서 상기 간격을 두고 칸막이부재(30)가 결합된 그라우팅재주입관(40)(41)(42)(43)을 강관(10)의 내부에 삽입한다.
41, 42, and 43, into which the partitioning members 30 are coupled, are inserted into the steel pipe 10 at the above-mentioned intervals in the field.

이때 강관(10)의 상부측에는 밀폐부재(31)를 장착하여 그라우팅재주입관(40)과 밀폐부재(31)를 서로 용접하여 일체가 되게 고정하고, 또 나머지 그라우팅재주입관(41)(42)(43)은 밀폐부재(31)에 오링(41a)을 설치하고, 강관(10)에 밀착시켜서 강관(10)의 선단부측 외주면에 장착되는 앤드커버(70)로 밀폐부재를 고정한다.
At this time, a sealing member 31 is mounted on the upper side of the steel pipe 10 to weld the grouting material 40 and the sealing member 31 integrally to each other, and the remaining grouting material 41, 42 43 are provided with an O-ring 41a on the sealing member 31 and fixed to the steel pipe 10 to fix the sealing member with the end cover 70 mounted on the outer circumferential surface on the tip end side of the steel pipe 10.

또한, 상기 각 구획실(20)(21)(22)(23)에 형성된 그라우팅재주입관(40)(41)(42)(43)을 그라우팅주입펌프(110)와 연결하여 그라우팅재를 동시에 각 구획실(20)(21)(22)(23)에 주입할 수 있도록 한다. The grouting canals 40, 41, 42 and 43 formed in the respective compartments 20, 21, 22 and 23 are connected to the grouting injection pump 110 so that the grouting material is simultaneously supplied to the compartments (20), (21), (22) and (23).

따라서 강관(10)의 내부에 다수개 형성되는 각 구획실(20)(21)(22)(23)에 그라우팅재를 동시에 주입할 수 있으므로, 주입시간이 단축됨은 물론, 각 구획실(20)(21)(22)(23)에 주입된 그라우팅재는 강관(10)의 외주면에 다수 천공된 배출공(11)을 통해 석탄층이나 모래자갈층과 같이 천공홀이 붕괴되는 지층의 틈새로 유입되어 지반을 강화시켜주게 된다.
Therefore, the grouting material can be simultaneously injected into the plurality of compartments 20, 21, 22, and 23 formed in the steel pipe 10, so that the injection time is shortened and the respective compartments 20 The grouting material injected into the grooves 22 and 23 is introduced into the gap of the stratum such as the coal layer or the sand gravel layer through the plurality of drilled holes 11 on the outer circumferential surface of the steel pipe 10 to strengthen the ground .

이때 강관(10) 선단부측의 밀폐캡(90)과 후단부측의 밀폐부재(31)와 앤드커버(70)에 의해 강관(10)의 각 구획실(20)(21)(22)(23)에 주입된 그라우팅재는 배출공(11)을 통해서 지반에 유입되지만, 강관(10)의 선단부와 후단부로는 밀폐캡(90)과 밀폐부재(31)와 오링(100) 그리고 앤드커버(70)에 의해 외부로 누출되지 않게 되는 것이다.
At this time, each of the compartments 20, 21, 22, and 23 of the steel pipe 10 is sealed by the sealing cap 90 on the distal end side of the steel pipe 10, the sealing member 31 and the end cover on the rear end side, The sealing member 31, the O-ring 100, and the end cover 70 are connected to the front end and the rear end of the steel pipe 10 through the discharge hole 11, So that it is not leaked to the outside.

상기한 바와 같은 구성을 갖는 본 발명이 비록 한정된 실시 예에 의해 설명되었으나, 본 발명은 이것에 의해 한정되지 않으며 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술사상과 아래에 기재될 청구범위의 균등범위 내에서 다양한 수정 및 변형이 가능하다 할 것이다.Although the present invention having been described above has been described with reference to a limited number of embodiments, it is to be understood that the present invention is not limited thereto and that various changes and modifications may be made without departing from the spirit and scope of the present invention by those skilled in the art. Various modifications and variations are possible within the scope of the appended claims.

10. 강관 11. 배출공
20, 21, 22, 23. 구획실 30. 칸막이부재
30a. 삽입홈 31. 밀폐부재
32. 용접 31a. 삽입홈
33, 34. 삽입구
40, 41, 42, 43. 그라우팅재주입관 41a. 오링
40a. 통공 50. 스토퍼와셔
60. 러버패킹 60a. 돌기
70. 앤드커버 80. 비트
90. 밀폐캡 100. 오링
110. 그라우팅주입펌프10. Steel pipe 11. Emitter
20, 21, 22, 23. Compartment 30. The partition member
30a. Insertion groove 31. Closure member
32. Welding 31a. Insert groove
33, 34. Inlet
40, 41, 42, 43. Grouting < RTI ID = 0.0 > 41a. O-ring
40a. Through hole 50. Stopper washer
60. Rubber packing 60a. spin
70. End cover 80. Bit
90. Sealed cap 100. O-ring
110. Grouting injection pump

Claims (6)

선단부에 비트(80)가 장착된 강관(10)의 외주면에 다수개의 배출공(11)을 천공하여 형성하고, 상기 강관(10)의 내부에 삽입되어 다수개의 구획실(20)(21)(22)(23)을 형성하기 위해 간격을 두고 형성되는 칸막이부재(30)는 그라우팅재를 주입하는 그라우팅재주입관(40)(41)(42)(43)과 각각 결합하고, 상기 칸막이부재(30)의 상부면과 하부면을 스토퍼와셔(50)로 고정하고, 상기 칸막이부재(30)의 가장자리에 형성된 삽입홈(30a)에 러버패킹(60)을 삽입하여 고정되게 형성하고, 상기 러버패킹(60)의 외주면에 형성된 다수개의 돌기(60a)는 강관(10)의 내부면에 밀착하여 고정하면서 그라우팅재가 다른 구획실(20)(21)(22)(23)로 누출되지 못하도록 형성하고, 강관(10)의 후단부에는 밀폐부재(31)와 앤드커버(70)를 장착하여 구성한 것을 특징으로 하는 터널 보강용 직천공 강관 동시 주입장치.A plurality of discharge holes 11 are formed in the outer circumferential surface of a steel pipe 10 having a bit 80 at the tip end thereof and inserted into the steel pipe 10 to form a plurality of compartments 20, The partitioning member 30 formed to be spaced apart from the partitioning member 30 is joined to the grouting material receiving pipes 40, 41, 42 and 43 for injecting the grouting material, And the rubber packing 60 is inserted into the insertion groove 30a formed at the edge of the partitioning member 30. The rubber packing 60 is fixed to the upper surface and the lower surface of the rubber packing 60 by the stopper washer 50, A plurality of protrusions 60a formed on the outer circumferential surface of the steel pipe 10 are tightly fixed to the inner surface of the steel pipe 10 so that the grouting material is prevented from leaking to the other compartments 20, 21, 22, , A sealing member (31) and an end cover (70) are attached to the rear end of the tunnel Device. 제 1항에 있어서,
상기 칸막이부재(30)의 외부로 돌출한 그라우팅재주입관(40)의 선단부는 밀폐캡(90)으로 마감하고, 구획실(20)의 내부에 그라우팅재를 주입할 수 있게 구획실(20) 내부에 형성되는 그라우팅재주입관(40)의 외주면에 다수개의 통공(41)을 천공하여 구성한 것을 특징으로 하는 터널 보강용 직천공 강관 동시 주입장치.The method according to claim 1,
The front end of the grouting material inlet pipe 40 protruding outside the partitioning member 30 is closed by the sealing cap 90 and formed in the partitioning chamber 20 so that the grouting material can be injected into the partitioning chamber 20 Wherein a plurality of through holes (41) are formed in the outer circumferential surface of the grouting reentrant pipe (40). 제 1항에 있어서,
상기 구획실(21)(22)(23)의 내부에 그라우팅재를 주입할 수 있게 그라우팅재주입관(41)(42)(43)의 선단부는 칸막이부재(30)의 저면으로 돌출하여 구성한 것을 특징으로 하는 터널 보강용 직천공 강관 동시 주입장치.The method according to claim 1,
The front end portions of the grouting material receiving pipes 41, 42 and 43 protrude from the bottom surface of the partitioning member 30 so that the grouting material can be injected into the partitioning spaces 21, 22 and 23 Simultaneous Injection System of Straight Perforated Steel Tubes for Tunnel Reinforcement. 제 1항에 있어서,
상기 강관(10)의 외주면에 다수 천공된 배출공(11)은 상,하,좌,우로 각각 천공되어 연약지반으로 그라우팅재가 골고루 유입할 수 있도록 구성한 것을 특징으로 하는 터널 보강용 직천공 강관 동시 주입장치.The method according to claim 1,
Wherein a plurality of vent holes (11) formed in the outer circumferential surface of the steel pipe (10) are perforated upward, downward, left, and right, respectively, so that the grouting material can be uniformly introduced into the soft ground. Device. 제 1항에 있어서,
상기 강관(10)의 밀폐부재(31)에 장착된 그라우팅재주입관(40)의 외주면을 용접(32)하고, 그라우팅재주입관(41)(42)(43)의 밀폐부재(31)에 오링(41a)을 장착하여 앤드커버(70)로 밀폐부재(31)를 고정되게 구성한 것을 특징으로 하는 터널 보강용 직천공 강관 동시 주입장치.The method according to claim 1,
The outer circumferential surface of the grouting material receiving pipe 40 mounted on the sealing member 31 of the steel pipe 10 is welded 32 and the sealing member 31 of the grouting material receiving pipe 41, 41a) is attached to the closure member (31), and the closure member (31) is fixed by the end cover (70). 1) 공장에서 강관(10)의 선단부에 비트(80)를 장착하고, 또 강관(10)의 내부에 삽입되는 그라우팅재주입관(40)의 단부측을 밀폐캡(90)으로 밀폐시킨 다음, 다수개의 돌기(60a)를 수평으로 돌출하여 형성한 러버패킹(60)을 삽입홈(30a)에 삽입하여 고정한 칸막이부재(30)를 하부에서 간격을 두고 다수개 결합하고, 나머지 그라우팅재주입관(41)(42)(43)은 간격을 두고 상부측으로 형성된 칸막이부재(30)의 외주면에 형성되는 삽입구(34)(35)(36)에 각각 시계방향으로 삽입하여 고정하고, 강관(10)의 내부에 다수개의 구획실(20)(21)(22)(23)이 형성되게 칸막이부재(30)를 장착한 그라우팅재주입관(40)(41)(42)(43)을 삽입하는 단계와,
2) 상기 강관(10)과 그라우팅재주입관(40)(41)(42)(43)을 각각 현장으로 이송하여 강관(10)의 내부에 그라우팅재주입관(40)(41)(42)(43)을 삽입한 후,
강관(10)의 상부측에 장착되는 밀폐부재(31)와 그라우팅재주입관(40)의 외주면을 용접(32)하고, 나머지 그라우팅재주입관(41)(42)(43)은 밀폐부재(31)에 오링(41a)을 장착하여 강관(10)의 선단부측 외주면에 장착되는 앤드커버(70)로 밀폐부재(31)에 고정하는 단계와,
3) 강관(10)의 내부 구획실(20)(21)(22)(23)에 형성된 각 그라우팅재주입관(40)(41)(42)(43)을 그라우팅주입펌프(110)와 연결하여 그라우팅재를 동시에 각 구획실(20)(21)(22)(23)에 주입하여 주입시간을 단축시킴과 동시에, 각 구획실(20)(21)(22)(23)에 주입된 그라우팅재는 강관(10)의 외주면에 다수 천공된 배출공(11)을 통해 연약한 지반의 틈새로 유입되어 지반을 강화시켜주는 단계를 포함하여 이루어지는 것을 특징으로 하는 터널 보강용 직천공 강관 동시 주입공법.The bit 80 is mounted on the tip end of the steel pipe 10 at the plant 1 and the end side of the grouting material 40 inserted into the steel pipe 10 is sealed with the sealing cap 90, A plurality of partitioning members 30 fixed by inserting the rubber packing 60 formed by horizontally protruding the projections 60a into the insertion grooves 30a are coupled at a distance from the bottom and the remaining grouting material accommodating pipes 41, 35 and 36 formed in the outer peripheral surface of the partitioning member 30 formed at the upper side with intervals therebetween so as to be fixed in the clockwise direction and fixed to the inside of the steel pipe 10 Inserting the grouting material 40, 41, 42, 43 having the partitioning member 30 to form a plurality of compartments 20, 21, 22, 23,
2) The steel pipe 10 and the grouting material receiving pipes 40, 41, 42 and 43 are respectively transported to the site so that the grouting material receiving pipes 40, 41, 42 and 43 ) Was inserted,
The sealing member 31 mounted on the upper side of the steel pipe 10 and the outer circumferential surface of the grouting reed pipe 40 are welded 32 and the remaining grouting pipe 41, 42 and 43 are welded to the sealing member 31, A step of mounting an O-ring 41a to the sealing member 31 by means of an end cover 70 attached to the outer peripheral surface of the front end of the steel pipe 10,
3) Each grouting re-entrainment pipe 40, 41, 42, 43 formed in the inner division chambers 20, 21, 22, 23 of the steel pipe 10 is connected to the grouting injection pump 110, The grouting material injected into each of the division chambers 20, 21, 22 and 23 is supplied to the steel pipe 10 And a plurality of holes (11) formed in the outer circumferential surface of the slab so as to penetrate into the gaps of the weak ground to reinforce the ground.
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