KR102692025B1 - Grouting method for water blocking using cip drilling holes and simultaneous pipes - Google Patents

Grouting method for water blocking using cip drilling holes and simultaneous pipes Download PDF

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KR102692025B1
KR102692025B1 KR1020230155684A KR20230155684A KR102692025B1 KR 102692025 B1 KR102692025 B1 KR 102692025B1 KR 1020230155684 A KR1020230155684 A KR 1020230155684A KR 20230155684 A KR20230155684 A KR 20230155684A KR 102692025 B1 KR102692025 B1 KR 102692025B1
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cip
simultaneous injection
grouting
injection pipe
simultaneous
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이규웅
이준표
이지은
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이규웅
이준표
이지은
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/02—Foundation pits
    • E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/06—Foundation trenches ditches or narrow shafts
    • E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for 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
    • E02D5/02—Sheet piles or sheet pile bulkheads
    • E02D5/03—Prefabricated parts, e.g. composite sheet piles
    • E02D5/10—Prefabricated parts, e.g. composite sheet piles made of concrete or reinforced concrete
    • E02D5/12—Locking forms; Edge joints; Pile crossings; Branch pieces
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
    • 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
    • E02D2600/00—Miscellaneous
    • E02D2600/20—Miscellaneous comprising details of connection between elements

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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)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

The present invention relates to a water-blocking grouting method using a cip perforation hole and a simultaneous injection pipe, wherein an h-pile or a reinforcing bar net in which the simultaneous injection pipe for grouting is assembled together is inserted into the cip perforation hole, and water-blocking grouting is constructed through the simultaneous injection pipe before curing concrete, thereby solving a conventional problem of having to perforate separately for water-blocking, securing excellent water-blocking performance by injection injection with injection pressure adjusted for each stratum, and reducing water-blocking construction costs and construction periods.

Description

CIP 천공홀과 동시주입관을 이용한 차수용 그라우팅 공법{GROUTING METHOD FOR WATER BLOCKING USING CIP DRILLING HOLES AND SIMULTANEOUS PIPES}Grouting method for water blocking using CIP drilling holes and simultaneous injection pipes {GROUTING METHOD FOR WATER BLOCKING USING CIP DRILLING HOLES AND SIMULTANEOUS PIPES}

본 발명은 흙막이 차수공사에 관한 것으로, 더욱 상세하게는 CIP 천공홀과 동시주입관을 이용한 차수용 그라우팅 공법에 관한 것이다.The present invention relates to earth retaining water blocking construction, and more specifically, to a grouting method for water blocking using CIP drilling holes and simultaneous injection pipes.

흙막이 차수공사는 주열식 흙막이 벽체시공으로 차수공사를 하는 것을 말한다. 여기서, 주열(柱列)식 흙막이 벽체시공이란 명칭에서 알 수 있듯이 땅속에 기둥(柱)을 열(列)지워 세워서 벽체를 만드는 공법으로, 대표적인 것으로 CIP(Cast In Placed Pile) 공법이 있다.Earth retaining water blocking construction refers to water blocking construction using main heat retaining wall construction. Here, as can be seen from the name of column-type retaining wall construction, it is a method of building a wall by erecting columns in the ground in rows. A representative example is the CIP (Cast In Placed Pile) method.

그런데, 종래 CIP 공법은, 한국 등록특허 10-1067707에 개시된 바와 같이, 현장타설 콘크리트말뚝을 연이어 시공한 후에 콘크리트말뚝 사이의 배면(흙막이 벽면 부분)에 차수용으로 그라우팅 기둥 천공을 별도로 형성하고 그라우트재를 충전하는 방식으로 이루어져 왔다. 따라서 차수 보조 시공이 필수적으로 요구되는 문제점이 있어 왔다. However, in the conventional CIP method, as disclosed in Korean Patent No. 10-1067707, after constructing cast-in-place concrete piles in succession, a grouting column perforation is separately formed for water blocking on the back surface (earth retaining wall portion) between the concrete piles, and the grout material is added. It has been done by charging. Therefore, there has been a problem where water auxiliary construction is essentially required.

이에 본 발명은 종래 CIP 공법의 문제점을 해소하고자, 추가적인 차수용 그라우팅 천공 없이 CIP 천공홀과 동시주입관을 이용한 차수용 그라우팅 공법을 제공하고자 한다. Accordingly, in order to solve the problems of the conventional CIP method, the present invention seeks to provide a water blocking grouting method using a CIP drilling hole and a simultaneous injection pipe without additional water blocking grouting drilling.

상기 목적을 달성하기 위하여, 본 발명에 의한 CIP 천공홀과 동시주입관을 이용한 차수용 그라우팅 공법은 주열식 흙막이 벽체용으로 CIP 천공홀을 형성하는 단계; 상기 CIP 천공홀에 그라우팅용 동시주입관이 함께 조립된 H 파일(H-Pile) 또는 철근망을 삽입하는 단계; 상기 H 파일 또는 상기 철근망이 삽입된 CIP 천공홀에 트레미관을 통해 콘크리트를 타설하는 단계; 및 상기 콘크리트의 양생 전에 상기 동시주입관에 그라우트재를 주입하여 차수 그라우팅을 시공하는 단계를 포함하여 구성된 것을 특징으로 한다.In order to achieve the above object, the water blocking grouting method using CIP drilling holes and simultaneous injection pipes according to the present invention includes the steps of forming a CIP drilling hole for a column-type earth retaining wall; Inserting an H-Pile or reinforcing bar network assembled with simultaneous injection pipes for grouting into the CIP drilling hole; Pouring concrete through a tremie pipe into the CIP drilling hole into which the H pile or the reinforcing bar network is inserted; And it is characterized by comprising the step of injecting grout material into the simultaneous injection pipe before curing the concrete to construct water level grouting.

상기 동시주입관은 바닥과 길이 방향으로 가며 흙막이 벽면을 향해 복수 개의 분출구가 형성될 수 있다.The simultaneous injection pipe extends from the bottom in the longitudinal direction and may have a plurality of jets formed toward the retaining wall.

상기 복수 개의 분출구는 상기 길이 방향으로 가며 이격 거리가 다르거나, 분출구의 직경이 다르게 형성될 수 있다.The plurality of jets may have different spacing distances in the longitudinal direction or may have different diameters of the jets.

상기 복수 개의 분출구에는 각각 분출압을 조절할 수 있는 노즐이 더 체결될 수 있다.A nozzle capable of adjusting the blowing pressure may be further coupled to each of the plurality of blowing holes.

상기 차수 그라우팅을 시공하는 단계는 상기 동시주입관을 통해 지층별로 주입압을 조절하여 상기 그라우트재를 주입 분사시키는 것을 특징으로 할 수 있다.The step of constructing the water level grouting may be characterized by injecting and spraying the grout material by adjusting the injection pressure for each stratum through the simultaneous injection pipe.

상기 동시주입관은 복수 개의 관과 패커로 상기 지층별 주입압을 조절하도록 구비될 수 있다.The simultaneous injection pipe may be equipped with a plurality of pipes and packers to adjust the injection pressure for each stratum.

본 발명은 CIP 천공홀에 그라우팅용 동시주입관이 함께 조립된 H 파일(H-Pile) 또는 철근망을 삽입하고, 콘크리트의 양생 전에 동시주입관을 통해 차수 그라우팅을 시공함으로써, 종래 차수용으로 별도 천공해야 하는 문제점을 해소하고, 지층별로 주입압 조절한 주입 분사로 우수한 차수 성능 확보는 물론, 차수 공사비와 공기를 절감할 수 있는 효과가 있다. The present invention inserts an H-Pile or a reinforcing bar network assembled with simultaneous injection pipes for grouting into a CIP drilling hole, and performs water blocking grouting through the simultaneous injection pipe before curing the concrete, thereby replacing the conventional separate water pipe for water blocking. It solves the problem of having to drill, secures excellent waterproofing performance by controlling the injection pressure for each stratum, and also reduces the cost and construction period for waterproofing.

도 1과 도 2는 본 발명의 각 실시예에 의한 CIP 천공홀과 동시주입관을 이용한 차수용 그라우팅 공법을 보여주는 개념도이다.
도 3과 도 4는 각각 도 2의 AA'선을 따라 동시주입관(그라우팅용 노즐강관)을 수직 절단한 모습을 보여주는 일 실시 단면도이다.
도 5는 도 3과 도 4의 분출구와 이에 체결되는 노즐(지층별 노즐)의 모습을 보여주는 일 예시 사진이다.
도 6과 도 7은 각각 본 발명의 구체적 실시예에 의한 CIP 천공홀과 동시주입관을 이용한 차수용 그라우팅 공법을 보여주는 상세도이다.Figures 1 and 2 are conceptual diagrams showing a water blocking grouting method using CIP drilling holes and simultaneous injection pipes according to each embodiment of the present invention.
Figures 3 and 4 are cross-sectional views of one embodiment showing a simultaneous injection pipe (nozzle steel pipe for grouting) cut vertically along line AA' in Figure 2, respectively.
Figure 5 is an example photo showing the spouts of Figures 3 and 4 and the nozzles (nozzles for each stratum) fastened to them.
Figures 6 and 7 are detailed views showing a water blocking grouting method using a CIP drilling hole and a simultaneous injection pipe according to a specific embodiment of the present invention, respectively.

첨부한 도면을 참조하며 본 발명의 바람직한 실시예에 대하여 설명한다.Preferred embodiments of the present invention will be described with reference to the attached drawings.

본 발명의 일 실시예에 의한 CIP 천공홀과 동시주입관을 이용한 차수용 그라우팅 공법은, 도 1 또는 도 2로 참조되는 바와 같이, 주열식 흙막이 벽체용으로 하나 이상의 CIP 천공홀(12, 14, 16, 18)을 형성하는 단계; 상기 CIP 천공홀에 그라우팅용 동시주입관(40)이 함께 조립된 H 파일(H-Pile, 60) 또는 철근망(20)을 삽입하는 단계; 상기 H 파일(60) 또는 상기 철근망(20)이 삽입된 CIP 천공홀(12, 14, 16, 18)에 트레미관(미도시)을 통해 콘크리트를 타설하는 단계; 및 상기 콘크리트의 양생 전에 상기 동시주입관(40)에 그라우트재를 주입하여 차수 그라우팅(50)을 시공하는 단계를 포함하여 구성된다.The grouting method for water blocking using a CIP drilling hole and a simultaneous injection pipe according to an embodiment of the present invention includes one or more CIP drilling holes (12, 14, 16, 18) forming steps; Inserting an H-Pile (60) or a reinforcing bar network (20) assembled with a simultaneous injection pipe (40) for grouting into the CIP drilling hole; Pouring concrete through a tremie pipe (not shown) into the CIP drilling holes (12, 14, 16, 18) into which the H pile (60) or the reinforcing bar network (20) is inserted; And it includes the step of constructing water level grouting (50) by injecting grout material into the simultaneous injection pipe (40) before curing the concrete.

여기서, 상기 CIP 천공홀(12, 14, 16, 18) 형성은 통상과 같이 Auger 천공으로 이루어 질 수 있다. Here, the CIP drilling holes 12, 14, 16, and 18 may be formed through Auger drilling as usual.

그리고 상기 CIP 천공홀(12, 14, 16, 18)에는, 도 1과 같이 3개 천공홀마다 또는 1~2개, 4~6개 천공홀마다 H 형강인 H 파일을 넣어 주열식 흙막이 벽체를 보강할 수 있다. 물론, 실시예에 따라, 상기 CIP 천공홀(12, 14, 16, 18) 모두에 H 파일을 넣어 시공할 수도 있다. 여기서 사용된 H 파일은 나중에 버팀대(Strut)를 설치할 때 용접하는 부위로 이용될 수 있다.And in the CIP drilling holes (12, 14, 16, 18), as shown in FIG. 1, H piles, which are H-beam steel, are inserted every three drilling holes or every 1 to 2 or 4 to 6 drilling holes to form a column-type earth retaining wall. It can be reinforced. Of course, depending on the embodiment, construction may be performed by inserting H files into all of the CIP drilling holes (12, 14, 16, and 18). The H pile used here can be used as a welding area when installing a strut later.

상기 철근망(20)은 띠철근 또는 나선 철근 형태일 수 있고, 여기에 연결되는 응력재(30)는 주철근(예컨대, 이형철근)이 사용될 수도 있으나, 도 2와 같이 고강도 강관 또는 강봉으로 함이 무게, 원가절감 및/또는 품질향상 등을 고려할 때 바람직하다.The reinforcing bar network 20 may be in the form of strip reinforcing bars or spiral reinforcing bars, and the stress member 30 connected to it may be a main reinforcing bar (e.g., deformed reinforcing bar), but is made of a high-strength steel pipe or steel bar as shown in FIG. 2. This is desirable when considering weight, cost reduction, and/or quality improvement.

상기 동시주입관(40)은, 도 1과 같이 H 파일(60)과 철근망(20) 각각에 부착되도록 함이 바람직하나, 도 2와 같이 철근망(20)에만 부착되도록 할 수 있다. 흙막이 벽면을 향해 철근망(20)의 내부 또는 외부에 부착되며, 분출구(42)는 CIP 천공홀 사이를 향하도록 함이 바람직하다.The simultaneous injection pipe 40 is preferably attached to each of the H pile 60 and the reinforcing bar network 20 as shown in FIG. 1, but can be attached only to the reinforcing bar net 20 as shown in FIG. 2. It is preferably attached to the inside or outside of the reinforcing bar mesh 20 toward the retaining wall, and the outlet 42 is directed between the CIP drilling holes.

도 2 및 도 3을 참조하면, 상기 동시주입관(40)은 바닥과 길이 방향으로 가며 흙막이 벽면을 향해 복수 개의 분출구(41, 42, 44, 46)가 형성될 수 있다. 이렇게 함으로써, 콘크리트 양생 전 동시주입관(40)을 통한 그라우팅 실시로 CIP 이음부 틈새 채움을 확실하게 할 수 있고, 양생 완료시 차수 그라우팅(50)된 CIP 배면 보강을 할 수 있게 된다. 또한, 바닥 분출구(41)를 통해 종래 CIP 선단부의 품질관리 미흡에 따른 문제점을 선단부 그라우팅 주입으로 CIP 품질 확보가 가능하게 된다. 나아가, 상기 동시주입관(40)을 이용하면 CIP 강재 설치부에 근입장까지 사전 그라우팅 주입으로 굴착 저면에 지하수가 유입되는 유로도 효과적으로 차단할 수 있다.Referring to Figures 2 and 3, the simultaneous injection pipe 40 may have a plurality of jets 41, 42, 44, and 46 formed along the floor and the longitudinal direction toward the earthen wall. By doing this, it is possible to reliably fill the gap in the CIP joint by grouting through the simultaneous injection pipe (40) before curing the concrete, and to reinforce the back of the CIP that has been grouted (50) upon completion of curing. In addition, through the bottom spout 41, it is possible to secure CIP quality by injecting grouting at the tip of the conventional CIP, solving problems caused by insufficient quality control at the tip. Furthermore, by using the simultaneous injection pipe 40, it is possible to effectively block the flow path through which groundwater flows into the bottom of the excavation by pre-grouting injection up to the rooting area of the CIP steel installation part.

실시예에 따라, 흙막이 벽면의 지층별 특성 예컨대, 도 3과 같이 깊이에 따른 조밀한 지반(1), 보통 조밀한 지반(2), 느슨한 지반(3) 등의 특성을 고려하여, 상기 차수 그라우팅을 시공하는 단계는 동시주입관(40)을 통해 지층별로 주입압을 조절하여 그라우트재를 주입 분사시키는 것이 바람직하다. Depending on the embodiment, considering the characteristics of each layer of the retaining wall, such as dense ground (1), normal dense ground (2), and loose ground (3) according to the depth as shown in FIG. 3, the order grouting In the construction step, it is desirable to inject and spray the grout material by adjusting the injection pressure for each stratum through the simultaneous injection pipe 40.

이를 위해, 상기 복수 개의 분출구(41, 42, 44, 46)는 길이 방향으로 가며 이격 거리가 다르거나, 분출구의 직경이 다르게 형성될 수 있다. To this end, the plurality of jets 41, 42, 44, and 46 may be formed at different distances in the longitudinal direction or with different diameters of the jets.

다른 실시예로, 도 3과 같이, 상기 복수 개의 분출구(42, 44, 46)에는 각각 분출압을 조절할 수 있는 노즐(72, 74, 76)이 더 체결될 수 있다.In another embodiment, as shown in FIG. 3, nozzles 72, 74, and 76 capable of adjusting the blowing pressure may be further attached to the plurality of blowing holes 42, 44, and 46, respectively.

또 다른 실시예로, 도 4와 같이, 상기 동시주입관(40)은 복수 개의 관(48a, 48b)과 패커(49a, 49b)로 지층별 주입압을 조절하도록 구비될 수 있다.In another embodiment, as shown in FIG. 4, the simultaneous injection pipe 40 may be equipped with a plurality of pipes 48a and 48b and packers 49a and 49b to adjust the injection pressure for each stratum.

도 5는 도 3 또는 도 4의 실시예로 구현될 수 있는 분출구(42a, 42b)와 이에 체결되는 노즐(지층별 노즐 1, 2, 3; 70)의 모습을 보여준다. 이에 의하면, 동시주입관(40) 측면의 각 분출구(42a)는 흙막이 벽면을 향해, 바람직하게는 도 2와 같이 천공홀 내벽에 닿을 정도로, 일정 길이 연통되게 돌출 형성되고, 끝단에는 나사산(42b)이 형성될 수 있다. 상기 나사산(42b)에는 노즐(70)이 지층별로 적절한 분출압을 가지도록 체결될 수 있다. 즉, 노즐(70)이 나사산(42b)에 체결되는 정도에 따라 분사 압력이 달라지게 하여 예를 들어, 지층별 노즐 1, 2, 3(72, 74, 76)으로 구현할 수 있다. 이렇게 함으로써, 구체적인 예로 도 3의 실시예에서 조밀한 지반(1)에 위치하는 분출구(42)에는 지층별 노즐 1(72)을 통해 30kg/㎠ 이상의 분사 압력을 가지도록 하고, 보통 조밀한 지반(2)에 위치하는 분출구(44)에는 지층별 노즐 2(74)를 통해 10kg/㎠ 이상에서 30kg/㎠ 미만의 분사 압력을 가지도록 하며, 느슨한 지반(3)에 위치하는 분출구(46)에는 지층별 노즐 3(72)을 통해 10kg/㎠ 미만의 분사 압력을 가지도록 할 수 있다.Figure 5 shows the jets (42a, 42b) that can be implemented in the embodiment of Figure 3 or Figure 4 and the nozzles (nozzles 1, 2, 3 for each stratum; 70) fastened thereto. According to this, each spout (42a) on the side of the simultaneous injection pipe (40) protrudes toward the earth retaining wall, preferably in communication with a certain length, to the extent of reaching the inner wall of the drilling hole as shown in FIG. 2, and has a screw thread (42b) at the end. This can be formed. The nozzle 70 may be fastened to the screw thread 42b to have an appropriate blowout pressure for each stratum. That is, the injection pressure varies depending on the degree to which the nozzle 70 is fastened to the screw thread 42b, and can be implemented with, for example, nozzles 1, 2, and 3 (72, 74, and 76) for each stratum. By doing this, as a specific example, in the embodiment of FIG. 3, the jet nozzle 42 located in the dense ground 1 has a spray pressure of 30 kg / cm 2 or more through the nozzle 1 72 for each stratum, and usually the dense ground ( The outlet (44) located in 2) has a spray pressure of 10 kg/cm2 or more to less than 30 kg/cm2 through the nozzle 2 (74) for each stratum, and the outlet (46) located in the loose ground (3) has a spray pressure of less than 30 kg/cm2. It is possible to have a spray pressure of less than 10 kg/cm2 through star nozzle 3 (72).

도 6과 도 7은 각각 본 발명의 구체적 실시예에 의한 CIP 천공홀과 동시주입관을 이용한 차수용 그라우팅 공법을 보여주는 상세도이다. 여기서, 네모 박스 안의 숫자는 시공 순서를 의미한다.Figures 6 and 7 are detailed views showing a water blocking grouting method using a CIP drilling hole and a simultaneous injection pipe according to a specific embodiment of the present invention, respectively. Here, the numbers in the square box indicate the construction order.

이상으로 첨부한 도면을 중심으로 바람직한 실시예에 대하여 설명하였으나, 도면의 표현이나 상술한 표현에 한정되지 않고, 상술한 실시예를 참조하여 다양하게 응용하여 실시 될 수 있다. 기타 미설명된 내용은 종래 CIP 공법에 따르므로, 이를 참조할 수 있다.Although preferred embodiments have been described above with reference to the attached drawings, they are not limited to the representations in the drawings or the above-described representations, and may be implemented by various applications with reference to the above-described embodiments. Other unexplained information follows the conventional CIP method, so you can refer to it.

12, 14, 16, 18: CIP 천공홀
20: 철근망
30: CIP 응력재
40: 동시주입관
42: 분출구
50: 차수 그라우팅
60: H 파일
70: 노즐12, 14, 16, 18: CIP drilled holes
20: rebar mesh
30: CIP stress material
40: Simultaneous injection tube
42: vent
50: Water grouting
60: H file
70: nozzle

Claims (6)

삭제delete 삭제delete 삭제delete 주열식 흙막이 벽체용으로 CIP 천공홀을 형성하는 단계;
상기 CIP 천공홀에 그라우팅용 동시주입관이 함께 조립된 H 파일(H-Pile) 또는 철근망을 삽입하는 단계;
상기 H 파일 또는 상기 철근망이 삽입된 CIP 천공홀에 트레미관을 통해 콘크리트를 타설하는 단계; 및
상기 콘크리트의 양생 전에 상기 동시주입관에 그라우트재를 주입하여 차수 그라우팅을 시공하는 단계를 포함하여 구성되되,
상기 동시주입관은 바닥과 길이 방향으로 가며 흙막이 벽면을 향해 복수 개의 분출구가 형성되고,
상기 복수 개의 분출구에는 각각 분출압을 조절할 수 있는 노즐이 더 체결되고,
상기 복수 개의 분출구는 각각 상기 동시주입관의 측면에서 상기 천공홀의 내벽에 닿게 일정 길이 연통되게 돌출 형성되고, 상기 돌출 형성된 끝단에는 나사산이 형성되고, 상기 나사산에는 상기 노즐이 지층별로 분사 압력이 달라지도록 체결되는 정도를 달리하여 체결된 것을 특징으로 하는 CIP 천공홀과 동시주입관을 이용한 차수용 그라우팅 공법.
Forming a CIP drilling hole for a main heat retaining wall;
Inserting an H-Pile or reinforcing bar network assembled with simultaneous injection pipes for grouting into the CIP drilling hole;
Pouring concrete through a tremie pipe into the CIP drilling hole into which the H pile or the reinforcing bar network is inserted; and
It includes the step of injecting grout material into the simultaneous injection pipe before curing the concrete to perform water level grouting,
The simultaneous injection pipe runs along the floor and in the longitudinal direction and has a plurality of jets formed toward the earthen wall,
A nozzle capable of adjusting the blowing pressure is further attached to each of the plurality of blowing outlets,
The plurality of jets are each protruded from the side of the simultaneous injection pipe to communicate with the inner wall of the drilling hole for a certain length, and a screw thread is formed at the protruding end, and the nozzle is installed on the screw thread so that the spray pressure varies depending on the stratum. A grouting method for water blocking using CIP drilled holes and simultaneous injection pipes, characterized by fastening with different degrees of fastening.
 삭제delete 삭제delete
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KR102415389B1 (en) * 2022-02-08 2022-06-30 주식회사 세기엔지니어링 Simultaneous injection pipe for grouting and simultaneous injection method for grouting using the same

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KR102415389B1 (en) * 2022-02-08 2022-06-30 주식회사 세기엔지니어링 Simultaneous injection pipe for grouting and simultaneous injection method for grouting using the same

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