KR200305548Y1 - The diameter magnification equipment for ground cutting and consolidation - Google Patents
The diameter magnification equipment for ground cutting and consolidation Download PDFInfo
- Publication number
- KR200305548Y1 KR200305548Y1 KR20-2002-0033761U KR20020033761U KR200305548Y1 KR 200305548 Y1 KR200305548 Y1 KR 200305548Y1 KR 20020033761 U KR20020033761 U KR 20020033761U KR 200305548 Y1 KR200305548 Y1 KR 200305548Y1
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- Prior art keywords
- nozzle
- injection
- expansion
- pressure water
- ground
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- 238000007596 consolidation process Methods 0.000 title claims description 12
- 238000002347 injection Methods 0.000 claims abstract description 57
- 239000007924 injection Substances 0.000 claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 230000004308 accommodation Effects 0.000 claims description 15
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 239000002689 soil Substances 0.000 abstract description 9
- 239000004927 clay Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 239000003415 peat Substances 0.000 abstract description 3
- 239000010419 fine particle Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- 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
- E02D3/123—Consolidating by placing solidifying or pore-filling substances in the soil and compacting the soil
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/60—Slitting by jets of water or other liquid
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
본 고안은 점토나 실트와 같은 미세한 입자의 흙이나 간극이 큰 유기질토, 이탄토 등의 토층으로 구성된 연약지반의 개량을 위해 연약지반 개량 과정 중 확경작업 또는 확경작업과 동시에 주입제를 압밀함에 있어서, 확경하기 위해 주입관을 회전시켜주기 위하여 기존에는 보링기와 같은 별도의 장비를 사용하나 별도의 장비 없이도 확경작업 또는 확경작업과 동시에 주입제의 지반 압밀을 위한 확경용 선단장치에 관한 것이다.In order to improve the soft ground composed of soil of fine particles such as clay or silt, soil with large gap organic soil, peat soil, etc. In order to rotate the injection pipe to enlarge the diameter, conventionally, a separate equipment such as a boring machine is used, but it is related to the diameter expansion device for consolidating the ground of the injection material at the same time as the diameter expansion work or diameter expansion work without any additional equipment.
Description
본 고안은 점토(粘土;일축압축강도가 0.5㎏/㎠이하인 점토)나 실트(silt;모래보다는 미세하고 점토보다는 거친 퇴적토)와 같은 미세한 입자의 흙이나 간극이 큰 유기질토(有機質土;organic soil), 이탄토(泥炭土;peat soil) 등의 토층으로 구성된 연약지반의 개량을 위해 연약지반 개량 과정 중 확경작업과 주입제(시멘트 밀크 또는 몰탈)를 압밀주입함에 있어서, 주입관(확경관)을 회전시키기 위해 사용되는 별도의 장비없이도 확경작업 또는 확경작업과 동시에 주입제의 지반압밀주입을 동시에 실시하기 위한 확경용 선단장치에 관한 것이다.The present invention is an organic soil with large gaps or organic soils with large gaps, such as clay (uncomplicated compressive strength of 0.5 kg / cm 2 or less) or silt (finer than sand and coarse than clay). In order to improve the soft ground composed of soil such as peat soil and peat soil, in the expansion of the soft ground improvement process and in the consolidation of injection (cement milk or mortar), The present invention relates to a tipping device for expanding diameters to simultaneously carry out ground compaction injection of the injected material without expanding or expanding diameters without any additional equipment used to rotate it.
종래에는 통상 확경천공과 주입제의 지반 압밀주입 과정으로 구분하여 시공하며 각 과정을 통해서 지반의 전단특성, 압축특성, 동적특성 등이 개선되는 효과가 있었다.Conventionally, the construction is divided into the diameter consolidation process of diameter drilling and injection and the ground shear, compression, and dynamic properties are improved through each process.
그러나 상기 종래의 기술은 확경작업시 확경관을 회전시켜 주는 보링기와 같은 별도의 대형ㆍ고가의 장비가 구비되어야 하고, 확경천공과 동시에 주입제를 압밀주입시공을 실시할 경우 확경관과 주입호스의 연결이 복잡해져 작업이 어렵거나 부정확해져 시공이 복잡해지는 등, 그에 따르는 공수와 시공비 등이 증가되는 문제점을 가지고 있었다.However, the conventional technology should be equipped with a separate large and expensive equipment, such as a boring machine that rotates the diameter tube during diameter expansion work, and when consolidation injection of the injection material at the same time as the diameter diameter puncture, As the connection becomes complicated, the work becomes difficult or inaccurate, and the construction becomes complicated, resulting in an increase in the labor and construction costs.
본 고안은 상술한 문제점을 해결하기 위하여 연구 끝에 다음의 기능을 가지는 획기적인 확경용 선단장치의 구조를 제공하도록 한 것에 목적이 있다.The object of the present invention is to provide a structure of a breakthrough expandable tip device having the following functions in order to solve the above problems.
즉, 첫째, 확경관 선단의 확경용 노즐부와 확경관을 분리하여 유동이 가능한 부쉬로 연결하고, 지반 절삭을 위한 고압 분사액의 고압 분사과정에서 분사액 반대방향으로 발생되는 탄발력 또는 반발력을 회전력으로 전용하여 보링기와 같은 별도의 고가 장비를 사용하지 않고도 지반 절삭을 가능하게 하며,That is, firstly, the expansion nozzle and the expansion pipe at the tip of the expansion pipe are separated and connected to the bush which can be flowed, and the elasticity or repulsive force generated in the opposite direction of the injection liquid in the high pressure injection process of the high pressure injection liquid for cutting the ground. Dedicated by torque, ground cutting is possible without the use of additional expensive equipment such as boring machines.
둘째, 상기의 작업시 확경관 안에 내관이 삽입된 2중관을 이용하여 지반 절삭과 동시에 주입제를 압밀주입할 수 있도록 하므로써 시공시간 단축, 시공의 정확성과 작업성을 동시에 향상케 한 것이다.Second, by using the double pipe inserted into the inner diameter pipe in the above work, it is possible to consolidate the injection of the injection with the ground cutting at the same time to shorten the construction time, improve the construction accuracy and workability at the same time.
도 1에서In Figure 1
도 1a는 본 고안상의 내관이 없는 경우의 확경용 선단장치의 사시도.Figure 1a is a perspective view of the tip for expanding diameter when there is no inner tube in the present invention.
도 1b는 본 고안상의 내관이 삽입된 확경용 선단장치의 사시도.Figure 1b is a perspective view of the distal end device for insertion of the inner tube according to the present invention.
도 2은 도 1a의 내관이 없는 경우의 확경용 선단장치의 분해 사시도.2 is an exploded perspective view of the distal end device for expansion in the absence of the inner tube of Figure 1a.
도 3은 도 1a에서의 A-A' 단면도로서 내관이 없는 때의 확경용 선단장치를 나타낸 단면도.3 is a sectional view taken along the line A-A 'in FIG. 1A, showing a tip device for expanding diameters when there is no inner tube.
도 4는 내관이 없을 때의 확경용 선단장치를 이용한 확경작업 및 주입제 압밀과정을 나타낸 시공순서도.Figure 4 is a construction sequence diagram showing the diameter expansion work and the injection unit consolidation process using the tip for expanding diameter when there is no inner tube.
도 5는 본 고안상의 내관이 삽입된 때의 확경용 선단장치의 단면도.5 is a cross-sectional view of the distal end device for expansion when the inner tube of the present invention is inserted.
도 6은 상기 내관이 삽입된 확경용 선단장치를 이용하여 확경작업 및 주입제 압밀과정을 나타낸 시공순서도.Figure 6 is a construction sequence diagram showing the diameter expansion work and the injection unit consolidation process using the diameter expansion tip device inserted into the inner tube.
도 7은 종래에 실시되고 있는 확경작업 및 주입제 압밀과정을 나타낸 시공순서도.Figure 7 is a construction sequence diagram showing the expansion process and the injection unit consolidation process is conventionally carried out.
<도면의 주요부분에 대한 부호설명><Code Description of Main Parts of Drawing>
d. 절삭경 G. 연약지반 I. 주입제d. Cutting diameter G. Soft ground I. Injection
L. 절삭깊이 P. 확경관 S. 공간L. Depth of cut P. Expanded tube S. Clearance
W. 고압수W. high pressure water
1. 확경용 선단장치 2. 확경관 선단부 3. 노즐수용부1. Expanding tip device 2. Expanding pipe tip 3. Nozzle receiving part
4. 확경관 말단부 5. 부쉬 6. 고압수 주입관4. End of expansion pipe 5. Bush 6. High pressure water injection pipe
7. 주입제 주입관 8. 내관 9. 외관7. Infusion tube 8. Inner tube 9. Appearance
10. 지중확대기둥 11. 케이싱 12. 내관 고정연결부10. Magnification column 11. Casing 12. Inner tube fixing connection
13. 리세스부(간격) 21. 걸림턱 22. 노즐연결공13. Recessed part (spacing) 21. Locking jaw 22. Nozzle connection hole
30. 분사노즐 31. 분사노즐 삽입공30. Injection nozzle 31. Injection nozzle insertion hole
이하, 본 고안에 따른 일 실시예를 첨부도면에 의거하여 보다 상세하게 설명한다.Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.
도 1은 본 고안상의 확경용 선단장치(1)의 사시도이고, 도 2는 본 고안상의확경관 선단부(2)와 노즐수용부(3)을 분해사시도로 알기 쉽게 나타낸 것이다.1 is a perspective view of the expansion device tip 1 for expansion of the present invention, Figure 2 is an exploded perspective view of the expansion pipe tip 2 and the nozzle accommodation portion 3 of the present invention.
본 고안상의 확경용 선단장치는 기본적으로 확경관 선단부(2), 노즐수용부(3) 및 부쉬(5)로 조합 구성된다.The expansion tip device according to the present invention is basically composed of a combination of the expansion pipe tip 2, the nozzle accommodation portion 3 and the bush (5).
도 3에 의거하여 본 고안장치를 구체적으로 보다 상세히 설명하면, 확경용 선단장치(1)는 확경관 선단부(2)에 유동이 가능한 부쉬(5;bush)가 걸림턱(21)에 의해 지지되어 있으며, 확경관 선단부(2)는 걸림턱(21)에 걸쳐져 외부로 돌출되어 있는 부쉬(5)를 노즐수용부(3)에 삽입하고, 확경관 선단부(2)와 노즐수용부(3)의 결합은 확경관 선단부(2)의 노즐연결공(22)과 노즐수용부(3)의 분사노즐삽입공(41)을 나사산이 형성되어 있는 분사노즐(30)로 결합하여 주고, 확경관 선단부(2)와 노즐수용부(3)는 고압수 분사시 마찰을 피하기 위한 일정한 리세스부(13;간격)를 가지게 한다.Referring to the present invention in more detail with reference to Figure 3, the expansion tip device 1 is supported by a latching jaw 21 bush (5; bush) that can be flowed to the expansion pipe tip (2) The expansion tube tip 2 is inserted into the nozzle accommodation portion 3 by inserting a bush 5 protruding outwardly across the locking jaw 21, and the expansion tube tip portion 2 and the nozzle accommodation portion 3 of the expansion tube tip portion 2 and the nozzle accommodation portion 3. Coupling combines the nozzle connection hole 22 of the enlarged tube end portion 2 and the injection nozzle insertion hole 41 of the nozzle accommodation portion 3 with the injection nozzle 30 having a thread, and the enlarged tube end portion ( 2) and the nozzle accommodating part 3 have a constant recess 13 (interval) to avoid friction during high pressure water injection.
상술한 본 고안의 목적에 따라 본 고안은 확경관 선단부(2)와 노즐수용부(3)를 유동이 가능한 부쉬(5;bush)로 연결하고, 고압의 분사액의 고압분사에 맞도록 분사노즐(30)를 구성하므로써, 고압의 분사액(이하 "고압수"라 함)을 주입하면 확경관 선단부(2)에 연결된 노즐수용부(3)에서 고압수(W)의 반발력이 생기므로 이를 이용하여 외부로 부터의 입력(일반적으로 보링기에 의한 회전력) 없이도 지반 절삭을 행한다.In accordance with the object of the present invention described above, the present invention connects the expansion pipe tip 2 and the nozzle accommodation portion 3 with a bush (5; bush) capable of flow, and is suitable for high pressure injection of high pressure injection liquid. By constructing 30, injection of a high pressure jet liquid (hereinafter referred to as "high pressure water") generates a repulsive force of the high pressure water (W) in the nozzle accommodation portion (3) connected to the expansion tube tip (2). Ground cutting is performed without input from the outside (generally by a boring machine).
또한, 도 5와 같이 내관(8)이 삽입된 2중관으로서의 확경용 선단장치(1)를 사용할 때에는 외관(9)에는 고압수(W)를 주입하여 지반 절삭을 하고, 동시에 내관에 주입제(I)를 압밀주입하여 지반에 주입한다.In addition, when using the expansion-diameter tip device 1 as a double pipe into which the inner pipe 8 is inserted, as shown in FIG. 5, high pressure water W is inject | poured into the exterior 9, and ground cutting is carried out simultaneously, Consolidate and inject I) into the ground.
상기의 분사노즐(30)은 고압수(2)의 압력 200~600㎏/㎠에 견딜 수 있는 것을 선정하고, 소모품으로 대략 100㎥ 작업에 한번씩 교체하여 주는 것이 바람직하며, 분사되는 고압수(W)의 량은 70~150ℓ/min 를 토출시켜주어야 한다.The spray nozzle 30 is selected to withstand the pressure of 200 ~ 600㎏ / ㎠ of the high pressure water (2), it is preferable to replace once every approximately 100㎥ work as consumables, high pressure water (W ) Should discharge 70 ~ 150ℓ / min.
상기의 확경용 선단장치(1)는 지반의 절삭을 위하여 확경용 분사노즐(30)이 장착된 확경관 선단장치(1)를 케이싱(11) 내에 삽입하여 고압펌프로 지반 절삭용 고압수(W)가 공급되는데, 여기에서 고압수(W)의 토출압력과 고압수(W)는 연약지반(G)의 종류에 따라 달라진다.The above-mentioned diameter-expansion tip device 1 inserts a diameter-diameter tip device 1 equipped with a diameter-spray injection nozzle 30 into the casing 11 so as to cut the ground with a high-pressure pump. ) Is supplied, where the discharge pressure of the high pressure water (W) and the high pressure water (W) depends on the type of soft ground (G).
연약지반(G)이 모래일 경우는 물과 흡착하여 팽윤(澎潤)하는 성질을 가진 벤토나이트(bentonite:몬모릴로나이트를 주로 한 점토)와 물을 혼합한 이수(泥水;stabilized liquid)를, 점토일 경우는 물을 사용하며, 일반적인 연약지반에는 시멘트와 물을 혼합한 현탁액이 고압수(W)로 사용된다.If the soft ground (G) is sand, bentonite (clay mainly composed of montmorillonite), which adsorbs and swells with water, and stabilized liquid mixed with water is clay. The water is used, and in the general soft ground, a mixture of cement and water is used as high pressure water (W).
개량할 지반의 특성에 따라 분사할 고압수(W)의 압력과 고압수(W)를 선택한 후 지상에 있는 확경관(1)의 말단부에서 고압수를 200~600㎏/㎠의 압력으로 주입하게 된다.Depending on the characteristics of the ground to be improved, select the pressure of the high pressure water (W) to be injected and the high pressure water (W), and then inject the high pressure water at a pressure of 200 to 600㎏ / ㎠ at the distal end of the expansion pipe (1) on the ground. do.
이렇게 주입된 고압수(W)는 노즐수용부(3)에 도달하게 되면 분사노즐(30)을 통해서 지중으로 토출되고 토출되고, 토출되는 고압수(W)의 수압에 의한 탄발력 또는 반발력에 의한 회전력이 발생하여 확경관 선단부(2)에 장착된 노즐수용부(3)가 회전하면서 지반을 절삭하게 된다.When the high-pressure water W injected as described above reaches the nozzle accommodating part 3, the high-pressure water W is discharged and discharged into the ground through the injection nozzle 30, and the elastic force or repulsion force is generated by the hydraulic pressure of the high-pressure water W discharged. The rotation force is generated and the nozzle accommodation portion 3 mounted on the enlarged diameter tube tip portion 2 rotates to cut the ground.
이때 분사된 고압수(W)가 절삭하는 절삭경(d)의 크기는 고압수(W)의 분사시간과 고압수(W)의 분사압력에 따라 다르지만 지반 절삭경(d)은 최대 3m를 넘지 않으며 고압수(W)의 분사량과 압력은 지상에 구비된 전자유량계(공지된 기술이므로 도면 및 설명은 생략함)로 고압수(W)의 양과 압력을 작업할 여건에 따라 미리 정해 놓고, 분사노즐(30)도 미리 선정하여 확경 선단부(2)와 일정한 간격(13)을 유지하는 노즐수용부(3)와 부쉬(5)는 작업전에 체결된다.In this case, the size of the cutting diameter (d) cut by the injected high pressure water (W) depends on the injection time of the high pressure water (W) and the injection pressure of the high pressure water (W), but the ground cutting diameter (d) does not exceed a maximum of 3m The injection amount and pressure of the high pressure water (W) is an electronic flowmeter (not known in the drawings and explanations are omitted because it is a known technology) provided on the ground according to the working conditions of the amount and pressure of the high pressure water (W), and the injection nozzle (30) is also selected in advance and the nozzle accommodation portion 3 and the bush 5, which maintain the constant diameter gap 13 and the constant diameter 13, are fastened before operation.
도 4는 본 고안을 연약지반(G)의 확경과 주입제(I) 지반압밀과정을 나타내는 시공 순서도이다.Figure 4 is a construction flowchart showing the diameter of the soft ground (G) and the injection (I) ground consolidation process of the present invention.
우선, 연약지반(G)을 확경하기 위해서는 지중의 일정한 깊이까지 케이싱(11) 천공을한 후(①), 확경을 위해 사용되는 확경용 선단장치(1)가 장착된 확경관(P)을 케이싱(11) 내에 삽입한다(②).First, in order to enlarge the soft ground (G), after drilling the casing (11) to a certain depth of the ground (①), casing the diameter pipe (P) equipped with the diameter expansion tip device (1) used for diameter expansion (11).
삽입한 확경용 선단장치(1)를 통하여 고압수(W)를 분사하면 고압수(W)의 반발력에 의하여 부쉬로 연결된 노즐수용부(3)가 일정 방향으로 회전하면 분출된 고압수(W)는 지반을 절삭한다(③).When the high-pressure water (W) is injected through the inserted diameter expanding end device (1), the high-pressure water (W) ejected when the nozzle receiving portion (3) connected by bushing by the repulsive force of the high-pressure water (W) rotates in a predetermined direction Cuts ground (③).
이렇게 절삭된 절삭경(d)의 깊이가 20~30m정도 되면 확경용 선단장치(1)가 장착된 확경관(P)을 제거한 후(④), 인위적으로 이완된 공간(S)에 주입제(I)를 압밀주입으로 충진시켜면(⑤), 지중확대기둥(10)이 만들어져 연약지반(G)을 개량하게 된다(⑥).When the depth of the cut diameter (d) cut in this way is about 20 to 30 m, after removing the diameter pipe (P) on which the diameter expanding tip device (1) is mounted (④), the injection agent ( When I) is filled with consolidation injection (⑤), underground enlarged column (10) is made to improve the soft ground (G) (⑥).
도 1b는 본 고안상의 내관이 삽입된 확경용 선단장치(1)의 사시도이고, 도 5는 본 고안상의 확경용 선단장치(1)를 단면도로 알기 쉽게 나타낸 것이다.Figure 1b is a perspective view of the diameter expansion front end device 1 is inserted into the inner tube according to the present invention, Figure 5 is a cross-sectional view of the diameter expansion front end device 1 according to the present invention.
도 5에 의거하여 상세히 설명하면, 확경관 선단부(2)에 유동이 가능한 부쉬(5;bush)가 걸림턱(21)에 의해 지지되어 있으며, 확경용 선단장치(1) 내에 삽입되는 내관(8)은 노즐수용부(3)를 포함한다. 이 내관은 확경관 선단부(2)의 걸림턱에 거치되어 외부로 돌출되어 있는 부쉬(5) 내부를 통해 삽입하여 확경관 노즐장치(1)의 말단부에 주입제(I)를 지반에 압밀주입할 때 흔들리지 않게 내관 고정연결부(12)에 의해 고정하고, 노즐수용부(3) 내에 삽입된 부쉬(5)는 나사로 된 분사노즐(30)로 확경관 선단부(1)와 노즐수용부(3)는 고압수(W) 분사시 회전에 의한 마찰을 피하기위해 일정한 간격(13)을 유지하면서 결합하여 준다.Referring to FIG. 5 in detail, a bush (5) that can flow to the enlarged tube end portion 2 is supported by the catching jaw 21, and the inner tube 8 inserted into the expanded diameter tip device 1 is inserted. Includes a nozzle accommodation portion (3). The inner tube is mounted on the locking jaw of the enlarged diameter tube tip 2 to be inserted through the inside of the bush 5 protruding outward to consolidate the injection agent I into the ground at the distal end of the enlarged diameter nozzle apparatus 1. When the tube 5 is fixed by the inner tube fixing connection part 12 and is inserted into the nozzle receiving part 3, the bushing 5 is a screw injection nozzle 30, and the enlarged tube end part 1 and the nozzle receiving part 3 are In order to avoid friction due to rotation when spraying high pressure water (W), it is combined while maintaining a constant interval (13).
또 다른 실시예로, 도 6은 확경을 위한 지반 절삭과 동시에 주입제(I)를 지반에 압밀주입으로 충진하는 과정을 나타낸 시공순서도이다.In another embodiment, Figure 6 is a construction sequence diagram showing a process of filling the ground with consolidation injection of the injection (I) at the same time as cutting the ground for diameter expansion.
지반 개량을 하기위한 연약지반(G)에 케이싱(11)을 천공(①)하는 것은 같으나, 내관(8)이 삽입된 확경용 선단장치(1)을 케이싱(11) 내에 삽입(②)한 후, 고압수(2)를 외관(9)에 주입하게 되면 내관(8)이 삽입된 확경용 선단장치(1)의 분사노즐(30)을 통하여 고압수(2)가 분사되면서 지반을 절삭하기 시작한다(③).It is the same to perforate the casing 11 in the soft ground G for improving the ground, but after inserting the expanding end device 1 into the casing 11 into the casing 11 with the inner tube 8 inserted therein. When the high pressure water 2 is injected into the exterior 9, the high pressure water 2 is injected through the injection nozzle 30 of the expansion tip 1 for insertion of the inner tube 8, and the ground begins to cut the ground. (③)
주입제는 고압수를 통한 지반 절삭 깊이(L)가 약 0.5m가 되면 지반 절삭과 동시에 지상에서 주입제(I)를 압밀주입으로 충진(④)하며 지반 절삭 깊이가 계획심도(20~30m)에 이르면 확경용 선단장치(1)의 고압수(W) 분사를 중지하고 주입제(I)를 내관(8)을 통해서 고압수(W)에 의해 인위적으로 이완된 공간(S)에 충진 완료하면 지중확대기둥(10)이 형성된다(⑤).When the ground cutting depth (L) through the high pressure water is about 0.5m, the ground cutting and filling the injection (I) with consolidation injection (4) from the ground at the same time, the ground cutting depth (20 ~ 30m) When it reaches to stop the injection of the high-pressure water (W) of the expansion tip device (1) and when the filling (I) is completed filling the space (S) artificially relaxed by the high-pressure water (W) through the inner tube (8) The underground magnification column 10 is formed (⑤).
상술한 바와 같이 이루어진 본 고안에 따른 효과는 다음과 같다.Effects according to the present invention made as described above are as follows.
첫째, 연약지반의 지반 개량을 위해서 실시되는 확경작업시 확경선단부와 노즐수용부를 연결해주는 유동이 가능한 연결부재로 인하여 지반 절삭을 위한 고압수의 주입만으로도 확경관을 회전시켜줄 별도의 장치 없이도 지반 절삭을 할 수 있어 시공이 간단해 지면서도 지반 확경작업을 할 수 있다.First, the ground cutting can be done without additional device to rotate the diameter pipe only by the injection of high pressure water for cutting the ground due to the flowable connecting member that connects the diameter expansion tip and the nozzle receiving part during the expansion operation conducted to improve the ground of the soft ground. The construction can be simplified and the ground can be expanded.
둘째, 연약지반에 지중확대기둥을 형성함에 있어서, 내관이 삽입된 확경용 선단장치는 지반 절삭과 동시에 주입제를 지반에 압밀줄입하여서 지중확대기둥을 형성하고, 간단한 시공절차에 의하여 연약지반을 개량하는 효과를 나타낼 수 있게 한다.Second, in the formation of underground expansion pillars in the soft ground, the expansion tip device with the inner tube inserted forms the ground expansion pillar by consolidating the injected material into the ground at the same time as the ground cutting, and improves the soft ground by simple construction procedure. To have the effect of doing so.
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| KR20-2002-0033761U KR200305548Y1 (en) | 2002-11-12 | 2002-11-12 | The diameter magnification equipment for ground cutting and consolidation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100846092B1 (en) | 2008-02-12 | 2008-07-14 | 주식회사 한국 지오텍 | Two step injection monitor of grouting for soft ground improvement |
| KR20200001678A (en) * | 2018-06-28 | 2020-01-07 | 이종운 | Water jet and Rock cutting method using the same |
| KR102225882B1 (en) * | 2019-12-17 | 2021-03-09 | 류시일 | Double casing and compaction grouting method using the same |
| CN117307156A (en) * | 2023-11-28 | 2023-12-29 | 中煤科工开采研究院有限公司 | Dual high pressure jet and method of use |
| KR102647114B1 (en) * | 2023-02-02 | 2024-03-14 | 중앙지오텍 주식회사 | Jet grouting equipment with ground cutting function |
-
2002
- 2002-11-12 KR KR20-2002-0033761U patent/KR200305548Y1/en not_active IP Right Cessation
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100846092B1 (en) | 2008-02-12 | 2008-07-14 | 주식회사 한국 지오텍 | Two step injection monitor of grouting for soft ground improvement |
| KR20200001678A (en) * | 2018-06-28 | 2020-01-07 | 이종운 | Water jet and Rock cutting method using the same |
| KR102174313B1 (en) * | 2018-06-28 | 2020-11-04 | 이종운 | Water jet |
| KR102225882B1 (en) * | 2019-12-17 | 2021-03-09 | 류시일 | Double casing and compaction grouting method using the same |
| KR102647114B1 (en) * | 2023-02-02 | 2024-03-14 | 중앙지오텍 주식회사 | Jet grouting equipment with ground cutting function |
| CN117307156A (en) * | 2023-11-28 | 2023-12-29 | 中煤科工开采研究院有限公司 | Dual high pressure jet and method of use |
| CN117307156B (en) * | 2023-11-28 | 2024-04-09 | 中煤科工开采研究院有限公司 | Dual high pressure jet and method of use |
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