Pressure support device for reinforcement of structures

Abstract

The present invention provides a pressure support device having improved pressure support force against a structure. The pressure support device according to one aspect of the present invention comprises: a body unit; and an injection unit coupled to one side of the body unit and configured to inject a filler for filling the inside of the body unit and an additive for congealing the filler, the injection unit being formed in at least one region inside the body unit.

Description

TITLE OF INVENTION PRESSURIZING SUPPORT DEVICE FOR REINFORCEMENT OF STRUCTURES TECHNICAL FIELD

[0001] The present disclosure relates to a pressurizing support device, and more particularly, to a pressurizing support device for reinforcement of structures such as tunnels.

[0002] This application is based on and claims priority from Korean Patent Application No. 10-2022-0069155, filed on June 7, 2022, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference. BACKGROUND ART

[0003] Generally, during subway construction or road construction, tunnel construction may be performed as needed to form a tunnel by excavation. During this tunnel construction, the tunnel is excavated to a size larger than the completed tunnel size in consideration of tunnel safety. At this time, as the excavation work progresses, an archshaped support member with a large section modulus is installed on the inner wall of the excavated tunnel, and a reinforcing layer such as shotcrete, rock bolts, wire mesh, lining concrete, or the like is constructed on the inner side to reinforce the tunnel.

[0004] At this time, the inner wall of the excavated tunnel forms an irregular surface, and the support member is installed in contact with the inner wall of the tunnel with this irregular surface, thereby reinforcing the inner surface of the excavated tunnel.

[0005] However, since the inner wall of the tunnel has an irregular surface, the inner wall of the tunnel and the support member may have partial contact rather than full contact. Accordingly, there is a problem in that it is difficult to obtain the best support performance expected from the arrangement of the support member.

[0006] Therefore, in order to solve this problem, in the conventional art, a pressing bag is installed between the inner wall of the tunnel and the support member to fill the noncontact area between the inner wall of the tunnel and the support member, so that the inner wall of the tunnel may be in contact with and supported by the entire surface of the support member.

[0007] However, the conventional pressing bag has disadvantage in that a filler such as cement milk is not uniformly filled therein and the cement milk does not cure properly. Accordingly, there is a problem that the inner wall of the tunnel is not stably supported. DISCLOSURE Technical Problem

[0008] The present disclosure is designed to solve the problems of the related art, and therefore the present disclosure is directed to providing a pressurizing support device with an improved pressurizing support force against a structure.

[0009] However, the technical problems to be solved by the present disclosure are not limited to the above, and other problems not mentioned herein will be clearly understood by those skilled in the art from the following description. Technical Solution

[0010] In one aspect of the present disclosure, there is provided a pressurizing support device comprising: a body unit; and an injection unit coupled to one side of the body unit and configured to inject a filler for filling an interior of the body unit and an additive for coagulating the filler into at least one area inside the body unit.

[0011] Preferably, the injection unit may include a first injection tube configured to inject the filler into the body unit; a second injection tube connected to the first injection tube in at least one area inside the body unit and configured to inject the additive into the first injection tube; and a connection tube configured to connect the first injection tube and the second injection tube.

[0012] Preferably, the first injection tube may have at least one injection hole formed in an outer circumference thereof to inject the filler and the additive into the body unit.

[0013] Preferably, the injection hole may be provided in plurality along a longitudinal direction of the body unit.

[0014] Preferably, the connecting tube may be provided in plurality along a longitudinal direction of the body unit.

[0015] Preferably, the pressurizing support device may further comprise a pair of sealing portions configured to seal both longitudinal ends of the body unit, and at least one of the pair of sealing portions may be configured such that the injection unit penetrates in a longitudinal direction of the body unit.

[0016] Preferably, the body unit may include a first portion; and a second portion coupled to at least a part of one side surface of the first portion along the longitudinal direction of the body unit to form an inner space for accommodating the filler and the additive.

[0017] Preferably, the sealing portions may be disposed at both longitudinal ends of the second portion, and the pressurizing support device may further comprise a fastening unit configured to surround the first portion and the second portion at both longitudinal ends of the body unit to make the first portion and the second portion overlap each other so that both longitudinal ends of the body unit come into close contact with an outer surface of the sealing portion.

[0018] Preferably, the second portion may include a coupling part configured to be in surface contact with at least a part of one side surface of the first portion; and a bending part connected to the coupling part and configured to be bent to surround the sealing portion.

[0019] Preferably, the coupling part may be provided in a pair, and the pair of coupling parts may be configured to face each other in a direction perpendicular to the longitudinal direction of the body unit, and the bending part may be configured to be bent from ends of the pair of coupling parts facing each other. Advantageous Effects

[0020] According to an embodiment of the present disclosure, since the filler may be uniformly coagulated inside the body unit, the inner wall of the structure may be stably supported through the pressurizing support device.

[0021] In addition, since the structural rigidity of the body unit may be reinforced, there is an advantage that the structure may be more stably supported.

[0022] In addition, various additional effects can be achieved by various embodiments of the present disclosure. These various effects of the present disclosure are described in detail in each embodiment, or the effects that can be easily understood by those skilled in the art will not be described in detail. DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings illustrate a preferred embodiment of the present disclosure and together with the foregoing disclosure, serve to provide further understanding of the technical features of the present disclosure, and thus, the present disclosure is not construed as being limited to the drawing.

[0024] FIG. 1 is a drawing showing a pressurizing support device according to an embodiment of the present disclosure.

[0025] FIG. 2 is a projective drawing showing the inside of the pressurizing support device of FIG. 1.

[0026] FIG. 3 is a front view showing the pressurizing support device of FIG. 1.

[0027] FIG. 4 is a side view showing the pressurizing support device of FIG. 1.

[0028] FIG. 5 is a drawing showing the state in which the inside of the pressurizing support device of FIG. 1 is filled.

[0029] FIG. 6 is a drawing showing the state before the pressurizing support device of FIG. 1 is fastened.

[0030] FIG. 7 is an enlarged view showing part A of FIG. 1.

[0031] FIG. 8 is a drawing exemplarily showing the state in which the pressurizing support device of FIG. 1 is installed to a structure. BEST MODE

[0032] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Prior to the description, it should be understood that the terms used in the specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present disclosure on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation.

[0033] Therefore, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the disclosure, so it should be understood that other equivalents and modifications could be made thereto without departing from the scope of the disclosure.

[0034] FIG. 1 is a drawing showing a pressurizing support device 10 according to an embodiment of the present disclosure, FIG. 2 is a projective drawing showing the inside of the pressurizing support device 10 of FIG. 1, FIG. 3 is a front view showing the pressurizing support device 10 of FIG. 1, FIG. 4 is a side view showing the pressurizing support device 10 of FIG. 1, and FIG. 5 is a drawing showing the state in which the inside of the pressurizing support device 10 of FIG. 1 is filled.

[0035] In the embodiment of the present disclosure, the X-axis direction depicted in the drawings may mean a longitudinal direction of a body unit 100, explained later, the Y-axis direction may mean a width direction of the body unit 100 perpendicular to the X-axis direction on a horizontal plane (XY plane), and the Z-axis direction may mean an upper and lower direction perpendicular to both the X-axis direction and the Y-axis direction.

[0036] Referring to FIGS. 1 to 5, a pressurizing support device 10 according to an embodiment of the present disclosure may be installed to a structure 1 (see FIG. 8) to support an inner wall of the structure 1. The pressurizing support device 10 may restore ground displacement that has occurred during excavation of the structure 1 to its original state by applying pressure to the inner wall of the structure 1.

[0037] As an example, the structure 1 may be a tunnel, and the inner wall of the structure 1 may be an excavation face of the tunnel, but is not limited thereto.

[0038] The pressurizing support device 10 may include a body unit 100 and an injection unit 200.

[0039] The body unit 100 may include a geotextile material. As an example, the geotextile may be made of a porous material formed by weaving synthetic fibers such as polypropylene, polyester, polyethylene, nylon, or the like. That is, the body unit 100 may be configured as a water-permeable body.

[0040] The injection unit 200 may be coupled to one side of the body unit 100. As an example, the injection unit 200 may be coupled to one longitudinal side of the body unit 100.

[0041] Also, the injection unit 200 may be configured to inject a filler C and an additive D into at least one area inside the body unit 100.

[0042] The filler C may be configured to fill the interior of the body unit 100. As an example, the filler C may be cement milk.

[0043] The additive D may be a composition for coagulating the filler C. As an example, the additive D may be an accelerating agent.

[0044] For example, if the additive D is mixed into the filler C, water may be discharged from the filler C filled inside the body unit 100. In addition, the water discharged in this manner escapes to the outside of the body unit 100, which is a water-permeable body, and only the cement component (e.g., cement particles) in the filler C may remain inside the body unit 100. Accordingly, the filler C may be coagulated. Specifically, the filler C may have increased strength compared to before coagulation. In addition, the coagulation time of the filler C may be shortened by the additive D.

[0045] The above-described injection unit 200 may inject the filler C and the additive D into the body unit 100 such that the filler C and the additive D may be mixed in at least one area inside the body unit 100. Specifically, the filler C and the additive D may be respectively injected into at least one area inside the body unit 100 through the injection unit 200 coupled to one side of the body unit 100. In addition, the filler C and the additive D may be mixed in at least one area inside the body unit 100 in a state of being injected into the body unit 100 through the injection unit 200. Accordingly, since the filler C and the additive D are not randomly injected into the body unit 100, the filler C may be uniformly coagulated inside the body unit 100.

[0046] According to this embodiment of the present disclosure, since the filler C may be uniformly coagulated within the body unit 100, the inner wall of the structure 1 may be more stably supported through the pressurizing support device 10.

[0047] Hereinafter, the specific structure of the pressurizing support device 10 will be described in more detail.

[0048] Referring to FIGS. 1 to 5 again, the injection unit 200 includes a first injection tube 210, a second injection tube 220, and a connection tube 230.

[0049] The first injection tube 210 may be configured to inject the filler C into the body unit 100. As an example, the first injection tube 210 may be configured in a pipe shape. In addition, the first injection tube 210 may receive the filler C from a filler supply tank (not shown) and inject the filler C into the body unit 100.

[0050] The second injection tube 220 may be connected to the first injection tube 210 in at least one area inside the body unit 100. In addition, the second injection tube 220 may be configured to inject the additive D into the first injection tube 210. As an example, the second injection tube 220 may be configured in a pipe shape. In addition, the second injection tube 220 may receive the additive D from an additive supply tank (not shown) and inject the additive D into the first injection tube 210.

[0051] The connection tube 230 may be configured to connect the first injection tube 210 and the second injection tube 220. As an example, the connection tube 230 may be configured in a pipe shape.

[0052] At this time, the additive D supplied to the second injection tube 220 may be injected into the first injection tube 210 through the connection tube 230. That is, the filler C and the additive D may be mixed at least partially inside the first injection unit 210 and injected into the body unit 100.

[0053] Meanwhile, the supply speed of the filler C into the first injection tube 210 may be faster than the supply speed of the additive D into the second injection tube 220. Accordingly, when the filler C and the additive D are supplied to the first injection tube 210 and the second injection tube 220, respectively, for the same amount of time, the amount of the filler C supplied to the first injection tube 210 may be greater than the amount of the additive D supplied to the second injection tube 220. Accordingly, the coagulation of the filler C by the additive D inside the first inj ection tube 210 before the filler C and the additive D are injected into the body unit 100 may be minimized. That is, due to this difference in supply speed, most of the filler C and the additive D may be mixed in the state of being injected from the first injection tube 210 into the body unit 100.

[0054] According to this embodiment of the present disclosure, the first injection tube 210 supplying the filler C and the second injection tube 220 supplying the additive D are connected so that the filler C and the additive D may be injected into the body unit 100 through the first injection tube 210. Accordingly, the filler C and the additive D may be prevented from being randomly injected into the body unit 100.

[0055] In particular, as illustrated in FIGS. 2 and 5, the first injection tube 210 may have at least one injection hole H in an outer circumference thereof.

[0056] The injection hole H may be configured to inject the filler C and the additive D, which are at least partially mixed inside the first injection tube 210, into the body unit 100. At this time, unlike the first injection tube 210, the second injection tube 220 does not have a separate injection hole.

[0057] Accordingly, directionality may be given to the injection direction of the filler C and the additive D into the body unit 100, and random injection into the body unit 100 may be prevented.

[0058] In addition, as shown in FIGS. 2 and 5, the injection hole H may be provided in plurality along the longitudinal direction of the body unit 100. That is, the filler C and the additive D may be injected from the first injection tube 210 into a plurality of areas inside the body unit 100.

[0059] According to this embodiment, the filler C may be uniformly coagulated in a plurality of areas inside the body unit 100.

[0060] In addition, as shown in FIGS. 2 and 5, the connection tube 230 may be provided in plurality along the longitudinal direction of the body unit 100. That is, the additive D may be injected from the second injection tube 220 to the first injection tube 210 in a plurality of areas. Accordingly, it is possible for the additive D to be quickly injected into an area of the first injection tube 210 that is far from the inlet of the first injection tube 210 in the longitudinal direction of the body unit 100.

[0061] According to this embodiment, since the additive D may be evenly injected into the first injection tube 210, it is possible to prevent the filler C from not being coagulated properly in some areas within the body unit 100. Accordingly, the filler C may be uniformly coagulated in a plurality of areas inside the body unit 100.

[0062] FIG. 6 is a drawing showing the state before the pressurizing support device 10 of FIG. 1 is fastened.

[0063] Referring to FIGS. 1 to 6, the pressurizing support device 10 may further include a pair of sealing portions 300.

[0064] The sealing portion 300 may be configured to seal both longitudinal ends of the body unit 100. As an example, the sealing portion 300 may be an elastic rubber, but is not limited to.

[0065] At this time, at least one of the pair of sealing portions 300 may be configured to be penetrated by the injection unit 200 in the longitudinal direction of the body unit 100. As an example, the injection unit 200 may be configured to inject the filler C and the additive D into the body unit 100 by penetrating both of the pair of sealing portions 300, or may be configured to inject the filler C and the additive D into the body unit 100 by penetrating only one of the sealing portions 300.

[0066] Specifically, the sealing portion 300 may include an insert hole 310 into which the injection unit 200 is inserted. At this time, the sealing portion 300 may support the injection unit 200 and may be in close contact with the outer circumference of the injection unit 200 by elastic force.

[0067] The insert hole 310 may include a first insert hole 310a and a second insert hole 310b.

[0068] The first injection tube 210 described above may be inserted into the first insert hole 310a. Also, the second injection tube 220 described above may be inserted into the second insert hole 310b.

[0069] According to this embodiment, the portion where the injection unit 200 is inserted into the body unit 100 may be sealed as stably as possible through the sealing portion 300.

[0070] Specifically, the body unit 100 described above may include a first portion 110 and a second portion 120.

[0071] The first portion 110 may constitute a lower portion of the body unit 100. As an example, at least a part of the first portion 110 may be formed in a flat mat shape.

[0072] The second portion 120 may be coupled to at least a part of one side surface of the first portion 110 (e.g., an upper surface of the first portion 110) along the longitudinal direction of the body unit 110 to form an inner space for accommodating the mixed filler C and additive D. As an example, the second portion 120 may be coupled to the first portion 110 by sewing, but the coupling method between the first portion 110 and the second portion 120 is not limited thereto. In addition, the first portion 110 and the second portion 120 may be coupled with a coupling strength sufficient to withstand an injection pressure of the filler C injected into the inner space by the first injection tube 210.

[0073] Since the second portion 120 may be configured to be coupled to the first portion 110 along the longitudinal direction of the first portion 110 in this way, the coupling requirement between the first portion 110 and the second portion 120 may be reduced.

[0074] In particular, the sealing portion 300 described above may be disposed at both longitudinal ends of the second portion 120.

[0075] In addition, the pressurizing support device 10 may further include a fastening unit 400. As an example, the fastening unit 400 may be a clamp, a high-pressure band, or the like, as a component that applies a tightening force to the body unit 100.

[0076] The fastening unit 400 may be configured to surround the first portion 110 and the second portion 120 at both longitudinal ends of the body unit 100 to make the first portion 110 and the second portion 120 overlap each other, so that both longitudinal ends of the body unit 100 come into close contact with the outer surface of the sealing portion 300. In addition, the sealing portion 300 made of an elastic material may be compressed by the tightening force of the fastening unit 400 and come into close contact with the outer circumference of the injection unit 200. Accordingly, both longitudinal ends of the body unit 100 may be sealed, thereby minimizing leakage of the filler C injected into the inner space to the outside.

[0077] As described above, the fastening unit 400 may surround the first portion 110 and the second portion 120 such that at least a part of the second portion 120 overlaps the first portion 110. Accordingly, the structural rigidity at both longitudinal ends of the body unit 100 where the sealing portion 300 is disposed may be reinforced, and both longitudinal ends of the body unit 100 may be stably sealed. Accordingly, the filler C may be stably coagulated within the body unit 100, so that the structure 1 may be more stably supported.

[0078] Referring to FIGS. 1 to 6 again, the second portion 120 may include a coupling part 122 and a bending part 124.

[0079] The coupling part 122 may be configured to make surface contact with at least a part of one side surface of the first portion 110.

[0080] The bending part 124 may be configured to be connected to the coupling part 122 and bent to surround the sealing portion 300.

[0081] Since a part of the second portion 120 (coupling part 122) is in surface contact with the first portion 110 as above, when the fastening unit 400 surrounds the first portion 110 and the second portion 120 so that the first portion 110 and the second portion 120 overlap each other, the first portion 110 and the second portion 120 may come into close contact with each other more easily. Accordingly, the structural rigidity at both longitudinal ends of the body unit 100 where the sealing portion 300 is disposed may be further reinforced. Accordingly, both longitudinal ends of the body unit 100 may be more stably sealed, thereby minimizing leakage of the filler C to the outside.

[0082] FIG. 7 is an enlarged view showing part A of FIG. 1.

[0083] Referring to FIGS. 1 to 7, the coupling part 122 may be provided in a pair, and the pair of coupling parts 122 may be configured to face each other in a direction perpendicular to the longitudinal direction of the body unit 100. That is, the coupling part 122 may be provided in a pair to face each other in the width direction of the body unit 100.

[0084] In addition, the bending parts 124 may be configured to be bent from ends of the pair of coupling parts 122 that are configured to face each other. Specifically, the bending parts 124 may be configured to be bent from ends of the pair of coupling parts 122 that face the center in the width direction of the body unit 100.

[0085] According to this embodiment, when the fastening unit 400 surrounds the first portion 110 and the second portion 120, the first portion 110 and the second portion 120 may be surrounded by the fastening unit 400 to be overlapped in multiple layers (e.g., three layers), as shown in FIG. 7. Specifically, when the fastening unit 400 surrounds the first portion 110 and the second portion 120, the first portion 110, the coupling part 122, and the bending part 124 may be surrounded by the fastening unit 400 to be overlapped. Accordingly, the structural rigidity at both longitudinal ends of the body unit 100 where the sealing portion 300 is disposed may be further reinforced, and both longitudinal ends of the body unit 100 may be more stably sealed.

[0086] FIG. 8 is a drawing exemplarily showing the state in which the pressurizing support device 10 of FIG. 1 is installed to a structure 1.

[0087] Referring to FIG. 8, the pressurizing support device 10 of the present disclosure may be installed to a structure 1 to support an inner wall of the structure 1.

[0088] Specifically, the structure 1 may be perforated so that a plurality of support pipes 2 are inserted horizontally or nearly horizontally along an underground excavation line. That is, the support pipes 2 may be inserted along the outer edge of the excavation section of the structure 1. In addition, cement milk may be injected into the support pipes 2 to reinforce the rigidity of the support pipes 2.

[0089] In addition, while excavating the area of the structure 1 located at the lower part of the support pipes 2, a plurality of support members 3 may be installed to be spaced apart from each other in a direction orthogonal to the support pipes 2 sequentially at the lower part of the support pipes 2. The support member 3 may be configured in approximately an ‘IT shape as a whole. Also, the support members 3 may be arranged in a direction orthogonal to the support pipes 2 to support the lower part of the plurality of support pipes 2.

[0090] Meanwhile, the pressurizing support device 10 described above may be placed between the upper surface of the support member 3 and the inner wall of the structure 1. Thereafter, the filler C and the additive D may be injected into the body unit 100 of the pressurizing support device 10 using the injection unit 200. At this time, as the filler C is coagulated inside the body unit 100, the pressurizing support device 10 may apply pressure to the inner wall of the structure 1, thereby restoring ground displacement caused during the excavation of the structure 1 to its original state.

[0091] After that, a shotcrete 4 may be poured onto the excavation surface between the support members 3 to further reinforce the structural strength of the structure 1.

[0092] Meanwhile, the pressurizing support device 10 of the present disclosure may be configured such that the length of the body unit 100 and the injection unit 200 may be easily adjusted to correspond to the length of the support member 3 or the like.

[0093] As described above, according to an embodiment of the present disclosure, since the filler C may be uniformly coagulated inside the body unit 100, the inner wall of the structure 1 may be stably supported through the pressurizing support device 10.

[0094] In addition, since the structural rigidity of the body unit 100 may be reinforced, there is an advantage that the structure 1 may be more stably supported.

[0095] The present disclosure has been described in detail. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the disclosure, are given by way of illustration only, since various changes and modifications within the scope of the disclosure will become apparent to those skilled in the art from this detailed description.

[0096] Meanwhile, even though terms indicating directions such as upper, lower, left, right, front, and rear are used in the present disclosure, these terms are just for convenience of explanation, and it is obvious to those skilled in the art that the terms may change depending on the position of the stated element or an observer.

Claims

1. A pressurizing support device comprising:a body unit; andan injection unit coupled to one side of the body unit and configured to inject a filler for filling an interior of the body unit and an additive for coagulating the filler into at least one area inside the body unit.

2. The pressurizing support device according to claim 1,wherein the injection unit includes:a first injection tube configured to inject the filler into the body unit;a second injection tube connected to the first injection tube in at least one area inside the body unit and configured to inject the additive into the first injection tube; anda connection tube configured to connect the first injection tube and the second injection tube.

3. The pressurizing support device according to claim 2,wherein the first injection tube has at least one injection hole formed in an outer circumference thereof to inject the filler and the additive into the body unit.

4. The pressurizing support device according to claim 3,wherein the injection hole is provided in plurality along a longitudinal direction ofthe body unit.

5. The pressurizing support device according to claim 2,wherein the connecting tube is provided in plurality along a longitudinal direction of the body unit.

6. The pressurizing support device according to claim 1, further comprising:a pair of sealing portions configured to seal both longitudinal ends of the body unit, wherein at least one of the pair of sealing portions is configured such that the injection unit penetrates in a longitudinal direction of the body unit.

7. The pressurizing support device according to claim 6,wherein the body unit includes:a first portion; anda second portion coupled to at least a part of one side surface of the first portion along the longitudinal direction of the body unit to form an inner space for accommodating the filler and the additive.

8. The pressurizing support device according to claim 7,wherein the sealing portions are disposed at both longitudinal ends of the second portion, andwherein the pressurizing support device further comprises a fastening unit configured to surround the first portion and the second portion at both longitudinal ends ofthe body unit to make the first portion and the second portion overlap each other so that both longitudinal ends of the body unit come into close contact with an outer surface of the sealing portion.

9. 5 The pressurizing support device according to claim 8,wherein the second portion includes:a coupling part configured to be in surface contact with at least a part of one side surface of the first portion; anda bending part connected to the coupling part and configured to be bent to surround 10 the sealing portion.

10. The pressurizing support device according to claim 9,wherein the coupling part is provided in a pair, and the pair of coupling parts are configured to face each other in a direction perpendicular to the longitudinal direction of the 15 body unit, andwherein the bending part is configured to be bent from ends of the pair of coupling parts facing each other.INTERNATIONAL SEARCH REPORT International application No. PCT / KR2023 / 095022A. CLASSIFICATION OF SUBJECT MATTER E21D ll / 10(2006.01)i; E21D ll / 36(2006.01)i; E21D 9 / 00(2006.01)i According to International Patent Classification (IPC) or to both national classification and IPC B. FIELDS SEARCHED Minimum documentation searched (classification system followed by classification symbols) E21D 11 / 10(2006.01): E02D 17 / 04(2006.01): E02D 17 / 08(2006.01); E21D 11 / 14(2006.01); E21D 11 / 36(2006.01); E21D 9 / 00(2006.01); E21D 9 / 04(2006.01) Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched Korean utility models and applications for utility models: IPC as above Japanese utility models and applications for utility models: IPC as above Electronic data base consulted during the international search (name of data base and, where practicable, search terms used) eKOMPASS (KIPO internal) &keywords: "-(body part), ir ¢1 (filler), 7^1](additive), r ‘a “-(injection part), 7}^ x] (pressure support device) C. DOCUMENTS CONSIDERED TO BE RELEVANT Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. Y A KR 10-1190117 Bl (LEE, HakKun) 11 October 2012 (2012-10-11) See paragraphs [0012] and [0052]-[0075] and figures 3-6. 1,6-10 2-5 Y JP 2005-060925 A (ASI IIMORI IND. CO., LTD.) 10 March 2005 (2005-03-10) See paragraph [0037] and figure 12. 1,6-10 A KR 10-2022-0003846 A (S.GEO-TECH CO., LTD.) 11 January 2022 (2022-01-11) See claim 1 and figures 3-4. 1-10 A KR 10-2020-0026342 A (DONG MYEONG ENGINEERING CONSULTANTS &ARCHITECTURE CO., LTD.) 11 March 2020 (2020-03-11) See claim 1 and figure 1. 1-10 | | Further documents are listed in the continuation of Box C. | J | See patent family annex. * Special categories of cited documents: “A” document defining the general state of the art which is not considered to be of particular relevance “D” document cited by the applicant in die international application ‘4E” earlier application or patent but published on or after the international filing date *4L” document which may throw doubts on priority claim(s) or which is cited to establish the publication date of another citation or other special reason (as specified) “O” document referring to an oral disclosure, use, exhibition or other means “P” document published prior to the international filing date but later than the priority date claimed “T” later document published after the international filing date or priority date and not in conflict with the application but cited to understand the principle or theory underlying the invention “X” document of particular relevance; the claimed invention cannot be considered novel or cannot be considered to involve an inventive step when the document is taken alone “Y” document of particular relevance; the claimed invention cannot be considered to involve an inventive step when the document is combined with one or more other such documents, such combination being obvious to a person skilled in the art document member of the same patent family Date of the actual completion of the international search 08 August 2023 Date of mailing of the international search report 08 August 2023 Name and mailing address of the ISA / KR Korean Intellectual Property Office Government Complex-Daejeon Building 4,189 Cheongsa-ro, Seo-gu, Daejeon 35208 Facsimile No. +82-42-481-8578 Authorized officer Telephone No.

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