KR790001349B1 - Process for anchoring multe-bulkheads - Google Patents

Process for anchoring multe-bulkheads Download PDF

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KR790001349B1
KR790001349B1 KR7802826A KR780002826A KR790001349B1 KR 790001349 B1 KR790001349 B1 KR 790001349B1 KR 7802826 A KR7802826 A KR 7802826A KR 780002826 A KR780002826 A KR 780002826A KR 790001349 B1 KR790001349 B1 KR 790001349B1
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casing rod
mortar
anchor
injection tube
rod
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KR7802826A
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Korean (ko)
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이범재
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이범재
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    • 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
    • E02D5/74Means for anchoring structural elements or bulkheads
    • E02D5/80Ground anchors
    • 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
    • E02D5/74Means for anchoring structural elements or bulkheads
    • E02D5/76Anchorings for bulkheads or sections thereof in as much as specially adapted therefor

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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)
  • Piles And Underground Anchors (AREA)

Abstract

An anchor construction method having a great resistance against pulling out has a process in which a hole is excavated by the casing rod, a pouring tube and anchor wire inserted, and mortar poured in under high press, then the whole casing rod is pulled out as far as the regular length before it becomes hard. Repeating this process, anchor wire is fixed in the ground firmly.

Description

다단정착형(多段定着型) 앵커공법Multi-stage anchoring method anchor method

제 1 도 내지 제 5 도는 본 발명의 실시예로서 공정순서를 표시한 일부단면 측면도이다.1 to 5 are partial cross-sectional side views showing the process sequence as an embodiment of the present invention.

본 발명은 토목공사에 있어서의 앵커공법에 관한 것으로, 간소화된 공정과 함께 빼내는 저항이 큰 앵커 정착을 가능하도록 한 것이다.The present invention relates to an anchor method in civil engineering, and to allow anchor anchors with high resistance to be pulled out together with a simplified process.

본 발명을 도면에 도시한 실시예에 따라 설명하면, 우선 앵커정착을 시행해야될 대상지반(a)에 케이싱 삭공기(削孔機)(1)를 사용하여 보우링공정을 행한다. 케이싱 삭공기(1)는 그 선단부에 대상지질에 대하여 효과적으로 작용할수 있는 비트(BIT)(2)를 장설하고 그비트(2)의 후부에는 굴삭(掘削)해야될 공경(孔經)에 알맞는 케이싱롯드(3)가 연결되어서 굴진작용체(掘進作用體)를 구성하고 있으며 그 굴진작용체에 적절한 회전내지 충격을 주면서 필요로하는 공경과 심도(深度)를 구비한 삭공부를 얻도록한 것이다. 굴진에 있어서는 단위 길이의 케이싱롯드(3)를 순차적으로 연결하고 필요로 하는 심도까지 도달하도록 한다. (제 1 도 참조)Referring to the present invention according to the embodiment shown in the drawings, a bowling process is first performed by using a casing cutting air 1 on the target ground a to be anchored. The casing cutting machine 1 installs a bit BIT 2 that can effectively act on the target lipid at its distal end, and is suitable for a hole to be excavated at the rear of the bit 2. The casing rod (3) is connected to constitute an excavating body, and to give the excavating body with appropriate rotational or impact, and to obtain a cutting hole having the required pore size and depth. . In drilling, casing rods 3 of unit length are sequentially connected to reach the required depth. (See Figure 1)

이와같은 상태에 있어서, 케이싱롯드(3)에 송수(送水)를 하여 케이싱롯드(3)속을 세정(洗淨)한다음 케이싱롯드(3)속에 몰탈압송용의 주입튜우브(4)를 삽입한다. 이주입튜우브(4)의 삽입에 있어서는, 탄성체(彈性體)를 사용하여 주입튜우브(4)의 축심(軸心)이 케이싱롯드(3)의 축심에 일치하도록 위치시키고 또, 주입튜우브(4)가 케이싱롯드(3)와 일체적으로 동작할수 있도록 연결시킨다.In such a state, water is supplied to the casing rod 3 to clean the casing rod 3, and then an injection tube 4 for mortar-feeding is inserted into the casing rod 3. do. In the insertion of the retracting tubing 4, an elastic body is used to position the axis of the injection tubing 4 so as to coincide with the axis of the casing rod 3, and the injection tubing ( 4) is connected to the casing rod (3) to operate integrally.

주입튜우브(4)의 선단부에는 고무등의 탄성체로 된 패커(packer)(5)가 장착되어 있고 그 패커(5)는 케이싱롯드(3)의 선단의 비트(2)부분안쪽에 위치케한다. 다음에, 그 케이싱롯드(3)속에 삽입 설정된 주입튜우브(4)의 안쪽에는 인장용강재(引張用鋼材)인 앵커와이어(b)를 삽입한다. 이 앵커와이어(b)는 패커(5)의 선단개구부를 통하여 삭공된 구멍의 바닥부분에 위치하게 된다. (제 2 도 참조)The tip of the injection tube 4 is equipped with a packer 5 made of an elastomer such as rubber, and the packer 5 is positioned inside the bit 2 portion of the tip of the casing rod 3. . Next, an anchor wire b, which is a tensile steel material, is inserted into the injection tube 4 inserted into the casing rod 3. The anchor wire b is positioned at the bottom of the cut hole through the tip opening of the packer 5. (See Figure 2)

이러한 상태에 있어서, 주입튜우브(4)에 접속된 고압펌프(6)를 개재하여 주입튜우브(4)속에 하나가득히 몰탈(c)을 고압으로 압입한다. (제 3 도 참조)In this state, the mortar (c) is press-fitted at high pressure into the injection tube 4 through the high pressure pump 6 connected to the injection tube 4. (See Figure 3)

이렇게한후 이몰탈(c)이 유동상태에 있을때에 케이싱롯드(3)의 전체를 일정거리분(S1)만을 빼내면 상기의 삭공부에 압입된 몰탈(c)에 의해서 삭공부에서의 롯드(3) 및 튜우브(4)의 앞쪽에 노출된 공벽(孔壁)의 붕괴는 방지된다.After this, when the mortar (c) is in the flow state, the entire casing rod (3) is pulled out only a predetermined distance (S 1 ) by the mortar (c) pressed into the above-mentioned hole to the rod at the hole The collapse of the hollow wall exposed in front of the 3 and the tub 4 is prevented.

케이싱롯드(3)의 후퇴에 있어서, 주입튜우브(4)는 케이싱 롯드(3)와 함께 작동 하면 일정거리분(S1)이 빠지지만, 앵커와이어(b)는 당초의 점유위치를 그대로 유지하여 롯드(3) 및 튜우브(4)의 앞쪽에 돌출된 상태의 것으로된다.In the retraction of the casing rod (3), the injection tube (4) is removed by a certain distance (S 1 ) when operating together with the casing rod (3), the anchor wire (b) to maintain the original occupied position It will be in the state which protruded in front of the rod 3 and the tub 4.

여기서, 삭공부의 구멍부분에 있어서, 구멍과 케이싱롯드(3) 외벽과의 사이의 간극은 고압펌프(6)의 압입과 그라우트 패커등에 의해 밀전(密栓)한다.Here, in the hole of the cut hole, the gap between the hole and the outer wall of the casing rod 3 is tightly sealed by press-fitting of the high-pressure pump 6 and grout packer or the like.

이에의해, 이미 주입튜우브(4)속을 채우고 있는 앞서의 유입몰탈(c)을 포함하여 고압몰탈(c)이 패커(5)의 전방으로 압송케된다. (제 4 도 참조)Thereby, the high-pressure mortar (c), including the inlet mortar (c) already filled in the injection tube (4), is pushed forward of the packer (5). (See Figure 4)

이때, 주입튜우브(4)의 선단에 있는 패커(5)는 팽창하면서 비트(2)내벽에 밀착되어 압송몰탈(c)이 케이싱롯드(3)안에 역류하는 것을 저지하도록 작용한다.At this time, the packer 5 at the tip of the injection tube 4 is in close contact with the inner wall of the bit 2 while expanding, and acts to prevent the pressure feeding mortar c from flowing back into the casing rod 3.

위의 제 1 단계의 고압몰탈(c)의 압입을 끝낸후, 이것이 굳어지기전에, 케이싱롯드(3)의 전체를 제차 일정거리분(S2)만 후퇴시켜서 다시 제 2 단계로서의 고압몰탈(c)의 압입을 한다. (제 5 도 참조)After the press-in of the high-pressure mortar (c) of the above first step is finished, before it hardens, the whole of the casing rod (3) is retracted only for a predetermined distance (S 2 ) and the high-pressure mortar (c) as the second step is again. Press). (See Figure 5)

위와같이 하여 케이싱롯드(3)의 일길이 마다 빼내는 것과 고압몰탈(c)의 압입을 반복하고 몰탈(c)에 의한 유효 정착부를 지반(a)속에 형성시킨후 케이싱롯드(3)의 빼내기와 양생, 긴장정착(緊張定着)등의 사후 시공처리가 행하여 진다.As above, the extraction of the casing rod 3 is repeated for each length of the casing rod 3, and the press-fitting of the high pressure mortar (c) is repeated, and the effective fixing part by the mortar (c) is formed in the ground (a), and then the casing rod (3) is removed and cured. Post-construction treatment, such as tension settlement, is carried out.

본 발명은, 상술한 실시예에 의하여서도 명백한바와 같이 삭공을 위한 기재로서 사용한 케이싱롯드를 삭공완성과 동시에 빼내는 것이 아니라 그 케이싱롯드안에 몰탈압입용 주입튜우브를 삽입함과 동시에 그 주입튜우브안에 앵커와이어를 삽입하여 앵커와이어의 선단부를 삭공의 구멍의 저부에 위치시킨다음 케이싱롯드를 주입튜우브와 함께 일정길이만큼씩 단계적으로 빼내고 단계적으로 빼내는 것에 병행하면서 주입튜우브를 개재하여 케이싱롯드의 빼내는 앞쪽에 고압몰탈을 압송하도록한 것으로서, 공정의 전체를 통하여 케이싱롯드는 몰탈압입에 의한 정착괴(塊)형성에 필요한 최소한도의 타설(打設) 부분을 제외한 삭공공벽의 전체를 전면적으로 지지하고 있게금 작용하고 공벽의 붕괴를 완전히 방지하는 것으로 되며 이리하여 케이싱롯드를 단계적으로 빼내면서 이것에 맞추어서 몰탈을 고압으로 압입하도록 하였기 때문에 흙속에 압입된 몰탈은 당초부터 고정적 위치에 설정유지 되어있는 앵커와이어에 따라서 팽괴부(膨塊部)를 만들면서 전체가 대략줄에 끼운 경단모양을 나타내는 것으로 되고 더욱이 케이싱롯드의 빼내는 거리를 적의가감(加減)하면 앵커와이어에 따른 소망의 개소에 경단 모양의 괴(塊)를 형성할수가 있으며 형성하려고하는 경단 모양의 수, 그 상호의 소밀(疎密)등을 임의로 조절하는 것도 용이하여 현장의 지질조건등에 적응한 앵커정착괴를 형성하여 앵커와이어에 충분한 빼내는 저항을 부여하는 것이 가능하게 된다.As is apparent from the above-described embodiment, the present invention does not remove the casing rod used as the substrate for the cutting hole at the same time as the cutting hole completion, but also inserts the injection mortar press injection tube into the casing rod. Insert the anchor wire and place the tip of the anchor wire at the bottom of the hole of the hole. Then, remove the casing rod with the injection tube stepwise by a certain length and take it out step by step while pulling out the casing rod through the injection tube. The high pressure mortar is pressed into the casing. Throughout the process, the casing rod fully supports the entire cutting hole wall except for the minimum casting part required for the formation of the fixed mass by the mortar indentation. To prevent the collapse of the vacant wall and thus completely eliminate the casing rod. Since the mortar was pressurized at high pressure in accordance with this step-by-step, the mortar pressed into the soil was initially inserted into a rough line while making a bulge part according to the anchor wire held at a fixed position. In addition, if the distance from the casing rod is pulled out, it can form dumplings in the desired position along the anchor wire, and the number of dumpling shapes to form. It is also easy to arbitrarily control the roughness and the like, so that anchor anchoring masses adapted to the geological conditions of the field can be formed, and the anchor wire can be given sufficient resistance to pull out.

즉, 종래의 앵커공법에 있어서는 소위롯드 가공형 앵커나 그라우트 가압형앵커등, 앵커전체가 대략 일정한 단면으로 되고, 앵커 주면(周面)과 지반과의 사이의 마찰력에 의하여 힘을 지반에 전달시키는 따위의 소위 주면정착형 앵커와 삭공의 일부에 확공부(擴孔部)를 형성하여 그 개소에 앵커체

Figure kpo00001
의 돌기부분을 위치시키는 확공형앵커나 앵커와이어에 플레이트등의 돌기물을 각별히 부착하는 케카니칼앵커등, 앵커전체가 일정한 단면이 아니라 부분적으로 확대혹은 돌출된 걸림부분이 있고 그 특별한 부분에 집중하여 힘을 지반에 전달하는 등의 소위 국부정착형 앵커가 일반적이고 이들은 그 적응토질에 따라서 구분사용되고 있으나, 본발명에 관한 앵커공법은 상기의 주면정착형 앵커와 국부정착형 앵커를 겸비한 형의 정착제를 형성할수 있는 것으로서 더욱이 그 주면정착성과 국부정착성을 적절히 조절제어할 수 있기 때문에 대상지반의 토질이 가령 비교적 경질의 경우, 혹은 점성이 높은 장소나 비교적 연질일경우, 특히 토층이 복잡화되어 있는 경우등 각각 그것에 적응한 효과적인 빼내는 저항을 가지는 앵커정착을 할 수 있게되는 것이다.That is, in the conventional anchoring method, the whole anchor has a substantially constant cross section, such as a so-called rod-type anchor or grout pressurized anchor, and transmits a force to the ground by the frictional force between the anchor main surface and the ground. The so-called main surface anchoring anchor and the expansion part are formed in a part of the hole, and the anchor body is located at the location.
Figure kpo00001
Expansion anchors for positioning projections and mechanical anchors for attaching projections, such as plates, to anchor wires, such as anchors. So-called locally anchored anchors, such as the transfer of force to the ground, are generally used according to their adaptation soils. However, the anchoring method of the present invention has a type of anchorage having both the principally anchored anchor and the anchored anchor. In addition, since the main surface adhesion and local adhesion can be appropriately controlled and controlled, the soil is complicated, for example, when the soil is relatively hard, or when the soil is highly viscous or relatively soft. In each case, it is possible to anchor anchors with effective pull-out resistance adapted to it. .

따라서, 본 발명의 공법에 의하면 공정이 극도로 간소화 되므로 공사는 당연히 신속화되고 공사비의 저렴화에 도움이 되는 것이다.Therefore, according to the construction method of the present invention, since the process is extremely simplified, the construction is of course faster and helps to reduce the construction cost.

Claims (1)

대상지반에 대하여, 소정구경을 가진 케이싱롯드를 사용하여 굴삭을 시행하고 소요심도의 삭공을 얻은 상태에서 케이싱롯드안에 주입튜우브를, 주입튜우브안에 앵커와이어를 각각 삽입한다음 주입튜우브안에 몰탈을 유입시키고 그것이 굳어지기전에 케이싱롯드의 전체를 주입튜우브와 함께 일정길이 만큼 빼내고 앵커와이어 선단부를 삭공의 저부위치에 잔류위치시킨 그대로의 상태에 있어서, 케이싱롯드의 앞쪽튜우브를 개재하여 고압몰탈을 압송하고 그 압송몰탈이 굳어지기전에 케이싱롯드의 전체를 주입튜우브와 함께 재차 일정길이만 후퇴시키어 몰탈압송을 하게하고 동일한 케이싱롯드의 후퇴와 고압몰탈의 압송을 순차반복하면서 지반중에 대략끈에 메어달은 경단모양의 몰탈정착괴를 형성하고 앵커와이어에 소요의 빼내는 저항을 부여하는 것을 특징으로 하는 다단정착형 앵커공법.Excavation is carried out using a casing rod with a predetermined diameter and the injection tube is inserted into the casing rod and the anchor wire is inserted into the injection tube, and mortar is inserted into the injection tube. And the high pressure mortar through the front tube of the casing rod in the state that the entire length of the casing rod with the injection tube was pulled out together with the injection tube and the anchor wire tip was positioned at the bottom position of the hole before it solidified. Before the pressure mortar hardens, the entire casing rod is retracted with the injection tube again for a certain length, and the mortar is conveyed. Forms a tip-shaped mortar mass and imparts resistance to the anchor wires. Multi-type anchor fixing method wherein the.
KR7802826A 1978-09-16 1978-09-16 Process for anchoring multe-bulkheads KR790001349B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101152325B1 (en) * 2011-07-15 2012-06-13 백성진 Ground pressure anchor of multi-column

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101152325B1 (en) * 2011-07-15 2012-06-13 백성진 Ground pressure anchor of multi-column

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