KR102065109B1 - Underground structure assembled by precast concrete structure and construction method thereby - Google Patents

Abstract

The present invention relates to an assembling underground structure using a PC structure and a construction method of the underground structure. According to an embodiment of the present invention, the assembling underground structure using the PC structure includes: a first PC structure having a predetermined shape; a second PC structure bonded to the first PC structure by a first bonding part in a first direction; a third PC structure individually bonded to the first PC structure and the second PC structure by a second bonding part in a second direction; and water stop members respectively provided on the first bonding part and the second bonding part so as to prevent a water leakage.

Description

UNDERGROUND STRUCTURE ASSEMBLED BY PRECAST CONCRETE STRUCTURE AND CONSTRUCTION METHOD THEREBY}

The present invention relates to a prefabricated underground structure using a PC structure and a construction method of the underground structure, and more specifically, for example, when constructing underground structures, such as underground roads and waterways using a PC (Precast Concrete) structure, The present invention relates to a prefabricated underground structure using a PC structure to completely prevent leakage of groundwater through the construction method of the underground structure.

Underground driveways are generally constructed by embedding heavy PC structures formed of one or more blocks in the basement and interconnecting them. The reason why the underground roadway is constructed by the unfavorable method of transportation and lifting is selected because safety is the top priority, such as underground investment, and when the PC structure is made in smaller units, the connection between adjacent blocks is not tight, resulting in structural defects. Because it becomes.

Recently, a new method of prefabricated underground roadway structure and construction technology has been introduced to fill such structural defects. However, the currently disclosed underground roadway construction method is not perfect for the watertightness and structural safety between adjacent PC blocks forming the outer wall. There is no problem.

In other words, while minimizing the cost of manufacturing, transporting and lifting each component constituting the underground driveway structure, it is easy to install and install, and it is a prefabricated basement using a new type of PC structure that guarantees the robustness and safety at completion. There is a need for structures.

Korea Patent Publication No. 10-1713674 (2017.03.02.) Korea Patent Publication No. 10-1888662 (2018.08.08.)

An embodiment of the present invention, for example, when constructing underground structures such as underground roads and waterways using PC structures, prefabricated underground structures using PC structures that completely prevent leakage of groundwater through water plates, etc. and construction methods thereof The purpose is to provide.

Prefabricated underground structure using a PC structure according to an embodiment of the present invention is a first PC structure of a predetermined shape, a second PC structure to be bonded by the first joining portion in the first direction with the first PC structure, the first PC And a third PC structure joined to the second PC structure by a second joining portion in the second direction, and an index member provided to prevent leakage at the first joining portion and the second joining portion, respectively.

The underground structure further includes a fourth PC structure joined to the first PC structure by a third joining part in a third direction, and the third joining part may be formed by caulking a sealing member.

The third joint part may include a ring fastening part including a first ring and a second ring respectively exposed from side surfaces of the first PC structure and the fourth PC structure, and the first ring and the second ring stacked on each other. A first steel part for fastening the first PC structure and the fourth PC structure to each other by a first steel material passing vertically, and an inner space of the third joint part including the ring fastening part and the first steel part; It may include a filling member to be filled.

The first to third directions may represent X, Z, and Y axis directions, respectively, with respect to the bottom surface.

The first to third junctions may be formed on the lower side, the upper side, and the side surfaces of the first PC structure and the second PC structure.

The first joining part may include a second steel part which connects the first PC structure and the second PC structure to each other by a second steel material, and the second steel part and the index member, and the bottom of the underground structure. It may include a filling member formed flat on the surface.

The second joining part may include a fastening part for fastening the third PC structure to the upper side of the first PC structure and the second PC structure, and a filling member filled in the inner space of the fastening part.

The fastening part may be formed in a second structure including a first structure or a slot including a screw and a bolt and a third steel material inserted into the groove.

The filling member may include anhydrous mortar or a rapid filler.

The index member may include a plurality of index plates provided in the first joint part as a first index member, and a water expansion index agent formed in the second joint part as a second index member.

In addition, the construction method of the prefabricated underground structure using a PC structure according to an embodiment of the present invention, the first PC structure of a predetermined shape and the second joint for joining the first PC structure in the first direction to prevent leakage 1. A method of providing a water repellent member, the method comprising: providing a water repellent member; and providing a second water repellent member for preventing leakage in a second joining portion of the third PC structure joined to the first PC structure and the second PC structure, respectively, in a second direction. Include.

The construction method may further include joining the first PC structure and the fourth PC structure by a third joining part in a third direction, wherein the third joining part may be formed by caulking a sealing member.

The construction method may include stacking the first and second rings exposed from the side surfaces of the first PC structure and the fourth PC structure, respectively, the first steel material as the first and second rings stacked. Fastening the first PC structure and the fourth PC structure to each other by vertically passing through the inner space of the third joint part including the first ring, the second ring, and the first steel material as a filling member. Filling may include.

The first to third directions may represent X, Z, and Y axis directions, respectively, with respect to the bottom surface.

The first to third junctions may be formed on the lower side, the upper side, and the side surfaces of the first PC structure and the second PC structure.

The construction method may include connecting the first PC structure and the second PC structure to each other by a second steel material, and filling the second steel material and the index member by a filling member, and a bottom surface of the underground structure. It may further comprise the step of forming a flat.

The construction method may further include fastening the third PC structure to the upper side of the first PC structure and the second PC structure by a fastening unit, and filling the filling member in the inner space of the fastening unit. can do.

The construction method may further include forming the fastening part in a first structure including a screw and bolt shape or a second structure including a groove and a third steel material inserted into the groove.

The filling member may include anhydrous mortar or a rapid filler.

The first joint part may include a plurality of index plates as the first index member, and the second joint part may include a water expansion index agent as the second index member.

On the other hand, the description of the technology disclosed herein is only an embodiment for structural or functional description, the scope of the disclosed technology is not to be construed as limited by the embodiments described in the text. That is, the embodiments may be variously modified and may have various forms, and thus the scope of the disclosed technology should be understood to include equivalents capable of realizing the technical idea. In addition, the objects or effects presented in the disclosed technology does not mean that a specific embodiment should include all or only such effects, and thus the scope of the disclosed technology should not be understood as being limited thereto.

In addition, the meaning of the terms described in the present invention will be understood as follows. The terms “first” and “second” are used to distinguish one component from another component, and the scope of rights should not be limited by these terms. For example, a first component may be named a second component, and similarly may be named a first component as a second component.

Further, when a component is referred to as being "connected" to another component, it should be understood that there may be other components in between, although it may be directly connected to the other component. On the other hand, when a component is referred to as being "directly connected" to another component, it should be understood that there is no other component in between. On the other hand, other expressions that describe the relationship between the components, such as "between" and "between," or "neighboring to," and "direct neighboring to" should be interpreted as well.

Singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as “include” or “have” refer to features, numbers, steps, operations, components, parts, or parts thereof described. It is to be understood that the combination is intended to be present and does not exclude in advance the possibility of the presence or addition of one or more other features or numbers, steps, operations, components, parts or combinations thereof.

According to an embodiment of the present invention, for example, minimizing the cost of the production, transportation and lifting of each component constituting the underground driveway structure, easy installation and construction, and robustness and safety can also be ensured at completion will be.

In other words, by improving the integrity of the joints of the PC structure to prevent the occurrence of water leakage from the groundwater from the outside, the construction between the PC structure is easy to shorten the construction, maintaining the same quality and waterproof effect To be excellent.

1 is a view showing the structure of an underground structure according to a first embodiment of the present invention,
2 to 4 are views for explaining the parts A to C of Figure 1,
5 is a view showing the structure of an underground structure according to a second embodiment of the present invention,
6 is a view for explaining a portion A of FIG.
7 is a view showing the structure of an underground structure according to a third embodiment of the present invention, and
8 is a flowchart illustrating a construction method of an underground structure according to an embodiment of the present invention.

Hereinafter, with reference to a preferred embodiment to which the present invention belongs will be described in more detail.

1 is a view showing the structure of an underground structure according to a first embodiment of the present invention, Figures 2 to 4 are views for explaining the parts A to C of FIG.

As shown in FIG. 1, the underground structure 90 according to the first embodiment of the present invention includes some or all of the main body 100, the slab 110, and the index members 200 and 310.

Here, "comprising part or all" means that the index members 200 and 310 can be formed integrally with the PC structure constituting the main body 100 or the slab 110, and the invention is sufficient. For the sake of understanding, the underground structure 90 will be described using separately formed index members 200 and 310.

The main body 100 includes a plurality of PC structures. According to the exemplary embodiment of the present invention, the main body 100 may refer to a PC structure which is formed vertically with respect to the basement floor surface when the base structure is formed under the ground 97. In other words, it is a PC structure forming a side wall. For convenience of explanation, a pair of PC structures coupled to each other will be taken as an example.

Each PC structure, that is, the first PC structure 101 and the second PC structure 102 according to an embodiment of the present invention are disposed to be spaced apart from each other by being spaced apart from each other by facing each other, an extension portion formed extending from the lower end 101a and 102a, and thus may have an “L” shape. In general, since the PC structure is formed and transported in the production plant in consideration of this point, it may have an L-shaped shape, and thus may have various forms.

The first PC structure 101 and the second PC structure 102 are joined and joined by a (bottom plate) connecting portion 120, that is, a first joining portion A, which connects each of the lower portions 101a and 102a to each other. . As can be seen in Figure 2, the connection portion 120 includes a steel 121, such as a joint reinforcing bar connecting each extension portion (101a, 102a) with each other, and a filling member 123 for embedding the steel (121). do. The filling member 123 is preferably an anhydrous mortar as a basic concrete (for example, 25-27-15), but various filling materials such as a rapid filling agent may be used.

In this case, the first junction A may include an index member 200 to prevent the junction from being leaked by the groundwater. In an embodiment of the present invention, this may be referred to as a first index member. In addition, a separate waterproof member 99 may be further included between the bottom surface and the lower portion where the first PC structure 101 and the second PC structure 102 are coupled to each other separately from the water index member 200.

In addition, each of the extension portions 101a and 102a may be provided to the site in the production stage while the connecting reinforcing bars are connected in order to form the first joint part A, but the reinforcing bar may be arranged such that furrows may be arranged on the upper part. Various methods may be possible, such as forming a wealth and then reinforcing the reinforcing bar in the field.

In addition, the slab 110 is coupled to the upper side of the first PC structure 101 and the second PC structure 102 are arranged at a predetermined interval from each other coupled by the connecting portion 120. The slab 110 is not a narrow concept that refers to the bottom of the reinforced concrete structure, but may be understood as a planar member that receives a vertical load as a wider concept. The slab 110 may have a "C" shape according to an embodiment of the present invention, and in the embodiment of the present invention, the slab 110 may be referred to as a third PC structure. The slab 110 may have a thickness of about 500T (that is, about 500mm) like the PC structures constituting the main body 100. As shown in FIG. 1, the length may be 4700 mm, but the width is preferably the same as that of the first and second PC structures 101 and 102 constituting the main body 100. It is not necessarily limited thereto.

In other words, it may be twice as wide, which will ultimately be determined for the various purposes of the construction. However, for convenience of description, it is assumed that the embodiment of the present invention has the same width.

The slab 110, that is, the third PC structure is coupled to the main body 100, that is, the slab 110 is coupled to the upper side of the first PC structure 101 and the second PC structure 102 coupled to each other underground It can be seen that some of the long tunnels formed by the structure are formed. In this manner, when the plurality of main body parts 100 and the slab part 110 are continuously connected in a side, a desired underground structure is completed. 3 shows a coupling part, ie, a second coupling part B, to which the slab 110 is coupled, and the second coupling part B may be an upper connection part.

The second joint part B may also include the index member 310 according to the embodiment of the present invention like the first joint part A. FIG. The second index member may be named to distinguish it from the index member 200 of the first junction A. The index member 310 may be a PVC index plate (eg, T = 5mm) or a water expansion index agent. Of course, any member may be used as long as it can serve the purpose of preventing leakage. The member means additional material or additional means. For example, after placing the index plate on the upper side of the first PC structure 101 and the second PC structure 102, the thread formed on the upper side of the first PC structure 101 and the second PC structure 102. A bolt 300, for example an anchor bolt, is fastened to a groove (or sleeve) in the form of a groove. Then, after injecting the non-shrink mortar into the grooves formed on both sides of the slab 110, that is, the third PC structure, the grooves filled with the non-shrink mortar can be injected into the anchor bolt exposed to the outside. In this manner, the configuration of FIG. 3 may be completed. Of course, the index plate can be replaced by using the water expansion index.

In other words, the third PC structure is fastened to the first and second PC structures 101 and 102 in the above-described manner, and the water-expandable index agent is filled into the fastened portion to penetrate into the gap. The index agent soaked into the gap may form the index member 310 according to an embodiment of the present invention. In the embodiment of the present invention, although not particularly limited to any one of the methods, the latter method may be preferable for the purpose of the invention. As much as the second bonding portion (B) is that the water-expandable index agent may be preferred. Therefore, the index plate may be preferable at the first junction A. FIG.

In addition, the first PC structure 101 constituting the main body portion 100 is coupled with the second PC structure 102 and the third structure 110 through the first junction (A) and the second junction (B). In addition to the above, the fourth PC structure 103 may be joined and coupled in a direction parallel to the first PC structure 101, that is, at a side surface thereof.

4 shows a side bond of the first PC structure 101. Side surfaces of the first PC structure 101 and the fourth PC structure 103 have a predetermined shape. The same applies to the second PC structure 102, of course. In the embodiment of the present invention, the portion where the first PC structure 101 is joined to the fourth PC structure 103 from the side is referred to as a third junction C.

The third joint C may form an SEG joint as a wall joint, and as shown in FIG. 4, the internal space is partitioned by caulking a sealing member 400 such as a sealant on the joint of the outer wall. More precisely, the formed internal space forms the third junction C by filling the high strength mortar with the binding bar (eg, U-shaped rebar) and the filling member 410. The binding of the first PC structure 101 and the fourth PC structure 103 is completed by the third joint portion C. As shown in FIG. Of course, high-strength mortar here may be used as a rapid filler.

In addition, the U-shaped reinforcing bars, which are binding bars, are inserted into the structure on one side and exposed to the outside in a ring shape, and the exposed rebar parts (eg, the ring parts) may be bound to each other. They may be stacked off each other. In addition, a vertical reinforcing bar may be inserted as the steel 420 in the center of the misaligned stacked rebar parts. It can be shaped like a latch on a doorknob. Since this binding process can be made in various forms, the embodiment of the present invention will not be specifically limited to the above manner. In addition, caulking, for example, using sealants as a waterproofing material may maintain watertightness from external groundwater.

The index members 200 and 310 according to the embodiment of the present invention include a first index member 200 and a second index member 310, and the first index member 200 and the second index member 310 A coating film is formed on the first PC structure 101 and the second PC structure 102 which are connected to each other on the inner and outer surfaces of the first PC structure 101 and the second PC structure 102 which are coupled to each other. It may also be shaped as formed or packaged.

Of course, since the waterproof member 99 is provided on the bottom surface, the waterproof member 99 may be completely waterproof if the watertight member is attached or combined. Such embodiments of the present invention will not be particularly limited to such forms.

A plurality of index plates 200 may be formed in the connection portion 120 of the first junction A, and the index plate 200 may be a PVC index plate, and one end may be configured inside the junction and the other end may be exposed to the outside. . At this time, by connecting the index plate 200 exposed to the outside, the underground structure may have a structure in which both the index plate 200 is formed inside and outside. This may be appropriately adopted depending on the purpose or cost of the construction.

5 is a view showing the structure of an underground structure according to a second embodiment of the present invention, Figure 6 is a view for explaining the portion B of FIG.

As shown in FIG. 5, the underground structure 490 according to the second embodiment of the present invention includes some or all of the main body 500, the slab 510 and the water stop member (not shown), where “some Or all inclusive " The index member may be provided only at the A site, but may also be provided at the B site.

There is no significant difference when comparing the underground structure 490 of FIG. 5 with the underground structure 90 of FIG. 1. However, the underground structure 490 of FIG. 5 is intended to show that the structure of a specific site, for example, the second junction part B, may vary slightly depending on how large the underground structure is to be formed. In FIG. 5, the height and width of the tunnel formed by the underground structure 490 may be different from those of the underground structure 90 in FIG. 1.

For example, for the above reason, the structure of the underground structure 490 according to the second embodiment of the present invention may be different from that of FIG. 1 in which the slab 510 of FIG. 5 is coupled to the main body 500 by the second junction B. FIG. Can be. As can be seen in Figures 5 and 6, the slab 510 may be shipped by including the reinforcing bar (for example 29mm) inside the production process, in this case exposed to the outside from both sides of the slab 510 The steel 510a, for example, the rebar, may be inserted into a groove or a sleeve 500a formed at upper portions of the first PC structure and the second PC structure, and then the filling member 600 may be filled in the sleeve 500a.

Filling member 600 may be injected with a rapid filler. Of course, before the bonding member 610, for example, an epoxy adhesive may be applied to the outer surface of each structure, and then the respective structures may be bonded to each other. The epoxy bonding agent may serve as an index member according to an embodiment of the present invention. You could do it. In other words, together with the index plate provided in the first bonding portion (A) serves to serve as an index member.

Except for the above points, since the underground structure 490 of FIG. 5 is not significantly different from the underground structure 90 of FIG. 1, the details of the underground structure 490 of FIG. I will replace it with the relevant contents.

7 is a view showing the structure of an underground structure according to a third embodiment of the present invention.

As shown in FIG. 7, the underground structure 690 according to the third embodiment of the present invention includes some or all of the main body 100, the slab 110 and the water stop member (not shown), where “some Or all inclusive "

Comparing the underground structure 690 of FIG. 7 with the underground structure 90 of FIG. 1, the underground structure 690 of FIG. 7 has a protruding portion (or extension) of both sides of the slab 710. It can be seen that the projecting longer than the 110. This may be due to the different height and width of the tunnel formed by the underground structure 690. Accordingly, the length of the bolt of the second joint part B, for example, the anchor bolt, becomes long and is injected into the groove or the sleeve. There may also be a difference in the amount of the non-shrink mortar compared to FIG.

Except for these points, since the underground structure 690 of FIG. 7 is not significantly different from the underground structure 90 of FIG. 1, the details of the underground structure 690 of FIG. 7 are described in detail with respect to the underground structure 90 of FIG. 1. I will replace it with the contents.

8 is a flowchart illustrating a construction method of an underground structure according to an embodiment of the present invention.

For convenience of description, referring to FIG. 8 together with FIG. 1, the underground structure 90 according to the embodiment of the present invention is joined to the first PC structure 101 having a predetermined shape in a first direction (eg, X-axis direction). The first joint member A of the second PC structure 102 is provided with a first index member 200 for preventing leakage (S800).

Here, the first index member 200 may be provided with a plurality of index plates, for example, as a PVC index plate, one side may be located inside the first junction A, and the other side may be exposed to the outside of the first junction A. will be. For example, the index plates respectively exposed from both sides of the first junction A to the upper side may be connected to each other by another index plate to have a form in which the connection part 120 is coded or packaged. Of course, since the waterproof member 99 is located on the lower side, the index plate will not need to be exposed to the lower side.

In addition, the second bonding portion B of the third PC structure (eg, slab 110) bonded to the first PC structure 101 and the second PC structure 102 in the second direction (eg Z-axis direction), respectively. ) May be provided with a second index member 310 for preventing leakage (S810).

Here, the second index member 310 may be a water-expandable index agent, which is also exposed to the inner and outer surfaces of the structure wall to form another index member along the inner and outer surfaces of the structure wall, respectively. By connecting with the first index member 200, the first index member 200 and the second index member 310 are coded on the inner and outer surfaces of the underground structure 90, in particular, the body portion 100. It may have a form.

Of course, a variety of forms may be possible depending on the purpose of construction, but if you want to form a water-resistant member on the front in this way, when the PC structure is shipped out of the state in the production process coated with a waterproof material on both sides in the production process PC Bonding and joining structures may also be very useful.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below It can be done.

99, 499, 699: waterproof member 100, 500, 700: main body
110, 510, 710: slab 120, 520, 720: connection
121, 420, 510a: Steel 123, 410, 600: Filling member
200, 310: index member 400: sealing member
500a: sleeve 610: bonding member

Claims (10)

A first PC (Precast Concrete) structure 101 having a predetermined shape; A second PC structure (102) bonded to the first PC structure (101) by a first joining portion (A) in a first direction; A third PC structure (110) joined to the first PC structure (101) and the second PC structure (102) by a second joining portion (B) in a second direction, respectively; A fourth PC structure (103) joined to the first PC structure (101) by a third joining portion (C) in a third direction; And a first index member 200 and a second index member 310 respectively provided to prevent leakage at the first junction A and the second junction B.
The first joining portion (A) may include a second steel portion connecting the first PC structure 101 and the second PC structure 102 to each other by a second steel material; And a filling member 123 that fills the second steel part and the first index member 200 and is formed flat on the bottom surface of the underground structure 90.
The second joining portion (B) may include a fastening portion for fastening the third PC structure 110 to the upper side of the first PC structure 101 and the second PC structure 102, respectively; A filling member 600 filled in the inner space of the fastening part; And joining members 610 applied to surfaces facing the first and second PC structures 101 and 102 and the third PC structure 110, respectively.
The third joint part C is formed by caulking the sealing member 400, and the first ring and the second ring exposed on the side of the first PC structure 101 and the fourth PC structure 103, respectively A ring fastening portion comprising; A first steel part which fastens the first PC structure 101 and the fourth PC structure 103 to each other by a first steel 420 vertically passing through the first ring and the second ring stacked on each other. ; And a filling member 410 filled in the inner space of the third joint part C including the ring fastening part and the first steel part.
The first index member 200 is a PVC index plate is provided with a plurality of index plates, the second index member 310 is provided with a water-expandable index agent, the first PC structure 101 and the second PC structure 102 is The lower portion is coupled is provided with a waterproof member 99 between the bottom surface,
One side of the plurality of index plates is located inside the first junction A, the other side is exposed to the outside of the first junction A, and the other side of the plurality of index plates exposed to the outside of the first junction A is Each is connected to each other by another index plate is configured to coat the first junction (A),
The second index members 310 are formed to be exposed to the inner and outer surfaces of the first and second PC structures 101 and 102, respectively, and the exposed second index members 310 are the first and second PC structures 101 and 102. Is connected to another index member formed along the inner surface and the outer surface of the, and another index member and the first index member 200 is connected to the inner surface and the outer surface of the underground structure 90 is the first index member ( 200) and the prefabricated underground structure using a PC structure, characterized in that the coating with a second index member (310).
The method of claim 1,
The first to third directions represent the X-axis, Z-axis and Y-axis directions with respect to the bottom surface, respectively.
The first to third junctions, prefabricated underground structure using a PC structure formed on the lower side, the upper side and the side of the first PC structure (101) and the second PC structure (102).
The method of claim 1,
The fastening part is a prefabricated underground structure using a PC structure formed of a second structure including a first structure or a groove (sleeve) and a third steel material is inserted into the groove including a screw and bolt form.
The construction method of the prefabricated underground structure using a PC structure according to any one of claims 1 to 3,
Providing a first index member (200) for preventing leakage at a first joining portion (A) of the second PC structure (102) joined to the first PC structure (101) having a predetermined shape in a first direction;
Second index member 310 for preventing leakage to the second bonding portion (B) of the third PC structure 110 which is bonded to the first PC structure 101 and the second PC structure 102 in the second direction, respectively Having a);
Connecting the first PC structure (101) and the second PC structure (102) to each other by a second steel material (121);
One side of the plurality of index plates is positioned inside the connection portion 120 of the first junction A, and the other side is installed to be exposed to the outside of the first junction A, and the other side of the plurality of index plates exposed to the outside, respectively. Another index plate is connected, and a waterproof member 99 is formed below the first joint portion A to coat the connection portion 120 of the first joint portion A, and the second index member 310 is first, 2 Another exponent formed along the inner and outer surfaces of the first and second PC structures 101 and 102 and installed so as to be exposed to the inner and outer surfaces of the PC structures 101 and 102, respectively. Connecting the member, and connecting the other index member and the first index member 200 to coat the inner and outer surfaces of the underground structure 90 with the first index member 200 and the second index member 310. In addition, the second steel 121 and the first index member 200 is buried by the filling member 123, the bottom surface of the underground structure 90 The step of forming the flat;
The first PC structure 101 is connected to the third PC structure 110 by a fastening part including a first structure including a screw and bolt, or a second structure including a third steel material inserted into the groove. And fastening to the upper side of the second PC structure (102), respectively;
Applying a bonding member 610 to a surface facing the first and second PC structures 101 and 102 and the third PC structure 110 and filling the filling member 600 in the inner space of the fastening part; ;
Bonding the first PC structure (101) to the fourth PC structure (103) by using a third joining portion (C) formed by caulking the sealing member (400) in a third direction;
Stacking the first and second rings exposed on the side surfaces of the first PC structure 101 and the fourth PC structure 103, respectively;
Fastening a first PC structure 101 and a fourth PC structure 103 to each other by vertically passing a first steel material 420 through the stacked first and second rings; And
Filling the inner space of the third joint portion (C) comprising the first ring, the second ring and the first steel with the filling member 410; Prefabricated underground structure using a PC structure comprising a Construction method.
The method of claim 4, wherein
The first joint portion A includes a plurality of index plates as the first index member 200, and the second joint portion B includes a water-expandable index agent as the second index member 310.
The filling member (123, 410, 600) includes an anhydrous mortar or rapid filler,
The first bonding portion (A) to the third bonding portion (C) is formed on the lower side, the upper side and the side of the first PC structure 101 and the second PC structure 102,
The first to third directions are the construction method of the prefabricated underground structure using a PC structure, characterized in that the X-axis, Z-axis and Y-axis direction with respect to the floor surface, respectively.
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