WO2022085973A1

WO2022085973A1 - Lower foundation construction method using mold-integrated pc panel, lower foundation structure using strut-and-tie stiffeners, and construction method therefor

Info

Publication number: WO2022085973A1
Application number: PCT/KR2021/013290
Authority: WO
Inventors: 신정열; 이안호; 여인호; 이성혁; 엄기영
Original assignee: 한국철도기술연구원
Priority date: 2020-10-22
Filing date: 2021-09-29
Publication date: 2022-04-28

Abstract

The present invention relates to a lower foundation construction method using a mold-integrated PC panel and, more specifically, to a lower foundation construction method using a mold-integrated PC panel, comprising the steps of: inserting a plurality of piles after a hole is bored in the ground, and then placing a PC panel on the piles to construct a PC wall; excavating the ground of a foundation part, and then pressing-in the PC panel to form a lower foundation structure wall; providing, on the upper end of the PC panel, a temporary construction panel for an earth-retaining structure; arranging reinforcing bars inside the foundation structure wall, and then pouring concrete to construct a lower foundation structure; and removing the temporary construction panel and the piles.

Description

Lower foundation construction method using formwork-integrated PC panel, lower foundation structure using strut tie reinforcement and its construction method

The present invention relates to a lower foundation construction method using a formwork-integrated PC panel, and a lower foundation structure using a strut tie reinforcement and a construction method thereof.

As a general construction method when constructing an underground structure in a building or civil engineering project, a vertical H-beam (thumb pile, hereinafter referred to as a thumb pile) is press-fitted or typed before the underground excavation work, and the wooden earth plate is placed in the thumb pile in the horizontal direction while excavating. The underground is excavated by installing them in a stacked manner.

At this time, the excavation site is to be excavated at a position that is separated by about 500mm or more from the outline of the structure for a space for the formwork of the underground outer wall.

After the underground excavation is completed, vertical and horizontal reinforcing bars are installed according to the installation location of the underground outer wall, and after formwork is done on the front/rear side of the wall, concrete is poured to complete the underground structure.

However, the construction method of forming a retaining wall by forming an earth wall with H-beam steel and wooden earth plate increases the amount of excavation work as it requires a considerable amount of free space to install and work the formwork for the wall of the underground structure. There is a wasteful factor that increases the amount of work, so the combined wall construction method in which a form is installed only on the front of the outer basement wall is used in the field. When concrete is poured, lateral pressure is applied to the formwork, and there were disadvantages such as the need to tightly install a support on the front side of the front formwork to support it.

1 shows a plan sectional view of KR Patent Publication No. 2003-10407 (published in 20030205). In order to solve the wasteful element of the retaining wall method for forming an earth wall using a conventional H-beam and a wooden board, in KR Patent Publication No. 2003-10407 (published on February 5, 2003), a thumb pile made of H-beams was built underground as shown in the drawing. After installing it vertically, place the fiber-reinforced cement containing reinforcing fibers so that the connecting hardware can be embedded in the concrete of the outer basement wall, and then apply the fiber-reinforced cement to the thumb piles and between the thumb piles. It has been known that a retaining structure construction method characterized in that it is poured so as to be filled, and the retaining structure can be synthesized with the underground outer wall of the building to replace the formwork.

However, in the above configuration, a retaining wall to be filled with fiber-reinforced small cement must be formed around and between the thumb piles, and the H-beam must be permanently buried underground together with the retaining wall, so there is a problem that the construction cost is excessive.

According to an embodiment of the present invention, when constructing a lower foundation structure using a cast-in-place foundation and a PC wall to which a PC panel and H-pile are applied, it is possible to use the PC wall as a formwork while simultaneously constructing it as the main wall of the lower foundation structure. have a purpose

According to the embodiment of the present invention, it is possible to reduce the area occupied by the temporary facility by applying the cast-in-place foundation and the integrated PC panel, and it is possible to reduce the amount of excavation by reducing the depth of the foundation, thereby reducing the construction period and the depth of the temporary facility. , The purpose of this is to provide a lower foundation construction method using a formwork-integrated PC panel that can reduce construction costs and shorten the formwork dismantling period by reusing H-pillars.

According to an embodiment of the present invention, along with a hybrid PC wall, struts that can reduce the depth of the foundation-to provide a lower pier foundation structure having a tie reinforcement and a construction method thereof

According to an embodiment of the present invention, there is an object of reducing the depth of the foundation and reducing the thickness of the foundation structure and the amount of excavation to achieve the reduction of the construction period and the reduction of the depth of temporary construction in the city center construction.

In addition, according to the embodiment of the present invention, the object of improving the load carrying capacity can be achieved even though the thickness of the lower foundation is reduced through the strut-tie reinforcement.

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly to those of ordinary skill in the art to which the present invention belongs from the description below. can be understood

A first object of the present invention, after inserting a plurality of piles after drilling the ground, mounting the PC panel on the pile to construct a PC wall; After excavating the ground of the foundation, press-fitting the PC panel to manufacture a lower foundation structure wall; Installing a temporary temporary panel for retaining on the top of the PC panel; After reinforcing reinforcement inside the wall of the foundation structure, pouring concrete to construct the lower foundation structure; and removing the temporary temporary panel and the pile; it can be achieved as a lower foundation construction method using a formwork-integrated PC panel, characterized in that it includes.

And the file may be characterized as an H file.

In addition, the PC panel includes a PC reference block, a PC corner block, and a PC panel block, wherein the PC panel block is assembled between the PC reference block and the PC corner block, and between the PC reference block and the PC reference block. can be done with

And the PC reference block may include a pile insertion end into which both ends of the flange of the H file are inserted along the longitudinal direction on one side of the side part, and a panel insertion end provided on each of both side end surfaces.

In addition, the PC corner block may have a L-shaped cross section, and may include a pile insertion end formed on the outer surface, and a panel insertion end formed on each of the inner surface.

And the PC panel block is in the form of a plate, protruding ends are formed on both end surfaces in the longitudinal direction, the H file is coupled to the pile insertion end of the PC reference block, and the H file is coupled to the pile insertion end of the PC corner block. and the PC panel block is fastened between the panel insertion end of the PC reference block and the panel insertion end of another PC reference block, and the PC panel between the panel insertion end of the PC reference block and the panel insertion end of the PC corner block It may be characterized in that the block is fastened.

And the step of manufacturing the lower foundation structure wall, the first step of mounting the PC corner block and the PC reference block to the upper end of each of the H pile after the penetration of the H pile; a second step of excavating the foundation; and sequentially press-fitting the PC corner block and the PC reference block, and inserting and assembling the PC panel block between the PC corner block and the PC reference block and between the PC reference block and other PC reference blocks adjacent to the PC reference block. Step 3; may be characterized as comprising.

In addition, it may be characterized by further comprising a fourth step of excavating the lower ground and repeating the steps of sequentially press-fitting the PC corner block, the PC panel block, and the PC reference block according to the basic grain size.

And in the step of constructing the lower foundation structure, it may be characterized in that the strut tie reinforcement is installed inside the wall of the foundation structure, the reinforcing bar is assembled, and then the concrete is poured to construct the lower foundation structure.

The second object of the present invention can be achieved as a lower foundation structure using an integrated PC panel, characterized in that it is constructed by the construction method according to the first object mentioned above.

According to the lower foundation construction method using the formwork-integrated PC panel according to the embodiment of the present invention, the PC wall is used as the formwork when constructing the lower foundation structure using the cast-in-place foundation, the PC panel and the PC wall to which the H-file is applied. At the same time, it has the effect that it can be constructed as the main wall of the lower foundation structure.

According to the lower foundation construction method using the formwork-integrated PC panel according to the present invention, the area occupied by the temporary facility can be reduced by applying the cast-in-place foundation and the integrated PC panel, and the amount of excavation can be reduced by reducing the depth of the foundation. It has the advantage of being able to shorten the reduction and the depth of temporary construction, and to reduce the construction cost and the period of dismantling the formwork by reusing the H-pillar.

Struts according to an embodiment of the present invention - According to the lower pier foundation structure having a tie reinforcement and its construction method, together with the hybrid PC wall, it has the effect of reducing the depth of the foundation.

According to an embodiment of the present invention, the lower pier foundation structure having a strut-tie reinforcement and a construction method therefor, reduce the thickness of the foundation structure and the amount of excavation by reducing the depth of the foundation in the downtown foundation construction, thereby reducing air and temporary depth has the advantage of being shortened.

According to an embodiment of the present invention, the strut-tie lower pier foundation structure having the reinforcement and the construction method thereof have the effect of improving the load-bearing capacity even though the thickness of the lower foundation is reduced through the strut-tie reinforcement.

On the other hand, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

1 is a plan sectional view of KR Patent Publication No. 2003-10407 (published in 20030205);

2 is a flowchart of a lower foundation construction method using a formwork-integrated PC panel according to an embodiment of the present invention;

3 is a front view of a PC wall combined with an H file and a PC panel according to an embodiment of the present invention;

4 is a perspective view of a PC reference block according to an embodiment of the present invention;

5 is a plan view of a PC reference block into which an H file is inserted according to an embodiment of the present invention;

6 is a perspective view of a PC corner block according to an embodiment of the present invention;

7 is a plan view of a PC corner block into which an H file is inserted according to an embodiment of the present invention;

8 is a perspective view of a PC panel block according to an embodiment of the present invention;

9 is a perspective view of a state in which a PC panel block is assembled between a PC corner block and a PC reference block according to an embodiment of the present invention;

10 is a perspective view of an H file installed after ground drilling according to an embodiment of the present invention;

11 and 12 are a side cross-sectional view and a perspective view of a state in which the PC reference block and the PC corner block are mounted on the H file after the H file is installed according to an embodiment of the present invention;

13 is a side cross-sectional view of a state of primary excavation of the foundation ground according to an embodiment of the present invention;

14 is a side cross-sectional view of a state in which a PC corner block is first press-fitted according to an embodiment of the present invention;

15 is a side cross-sectional view of a state in which the PC reference block is first press-fitted and the PC panel block is press-fitted between the PC corner block and the PC reference block according to an embodiment of the present invention;

16 is a side cross-sectional view of a state in which the PC panel is sequentially first press-fitted according to an embodiment of the present invention;

17 is a side cross-sectional view of a state in which the primary press-fitted PC panel lower base part is secondary excavated according to an embodiment of the present invention;

18 is a side cross-sectional view of a state in which the PC panel is secondarily press-fitted according to an embodiment of the present invention;

19 is a side cross-sectional view of a state in which a PC corner block, a PC reference block, and a PC panel block are secondarily press-fitted, and a temporary temporary panel for retaining is installed on the top according to an embodiment of the present invention;

20 and 21 are a side cross-sectional view and a perspective view of a state in which a temporary temporary panel for retaining is installed on the upper end of the PC panel press-fitted sequentially according to an embodiment of the present invention;

22 is a perspective view of a lower foundation wall constructed according to an embodiment of the present invention;

23 is a side cross-sectional view of a state in which reinforcing materials and reinforcing bars are installed inside the lower foundation wall according to an embodiment of the present invention, and the foundation concrete is poured;

24 is a perspective view of a state in which the base unit of the strut tie reinforcement is installed inside the lower foundation wall according to an embodiment of the present invention;

25 is a perspective view of a base unit of a strut tie reinforcement inside a lower foundation wall according to an embodiment of the present invention;

26 is a front view of the foundation unit of the strut tie reinforcement inside the lower foundation wall according to an embodiment of the present invention;

27 is a plan view of a strut tie member of a base unit according to an embodiment of the present invention;

28 is a cross-sectional view taken along line A-A of FIG. 27;

29 is a sectional view taken along line B-B of FIG. 27;

30 is a perspective view of a steel box unit according to an embodiment of the present invention;

31 is an exploded perspective view of a base unit and a steel box unit according to an embodiment of the present invention;

32 is a perspective view of a strut tie reinforcement installed in a foundation structure wall according to an embodiment of the present invention;

33 is a plan view of a strut tie reinforcement according to an embodiment of the present invention;

34 is a cross-sectional view taken along line A-A of FIG. 33;

Fig. 35 is a cross-sectional view taken along line B-B of Fig. 33;

36 is a side cross-sectional view of a state in which the temporary panel and the H file are removed according to an embodiment of the present invention;

37 and 38 show a side cross-sectional view and a perspective view of a lower base structure constructed according to an embodiment of the present invention.

Hereinafter, a lower foundation construction method using a formwork-integrated PC panel according to an embodiment of the present invention according to an embodiment of the present invention will be described.

First, Figure 2 shows a flowchart of a lower foundation construction method using a formwork-integrated PC panel according to an embodiment of the present invention.

In the construction of the lower base structure 100 according to the embodiment of the present invention, the PC wall 1 integrated with the formwork and the base structure wall is used at the same time.

Prior to the description of the lower foundation construction method using the formwork-integrated PC panel, the configuration of the PC wall 1 applied to the lower foundation structure construction will be described first.

3 shows a front view of the PC wall (1) to which the H-file (2) and the PC panel are combined according to an embodiment of the present invention. As shown in FIG. 3 , the PC wall 1 according to the present invention is configured to include an H file 2 and a PC panel 3 .

The PC panel 3 according to the embodiment of the present invention may be configured to include a PC reference block 10 , a PC corner block 20 and a PC panel block 30 . In addition, such a PC panel may be configured to include a fiber-reinforced cement composite, a fiber-reinforced mesh, and the like. And, the PC panel block 30 is assembled between the PC reference block 10 and the PC corner block 20, and between the PC reference block 10 and the PC reference block 10, to produce a base structure wall. there will be

4 is a perspective view of the PC reference block 10 according to an embodiment of the present invention. And FIG. 5 shows a plan view of the PC reference block 10 into which the H-file 2 is inserted according to an embodiment of the present invention.

4 and 5, the PC reference block 10 is provided on one side of the side part along the longitudinal direction with the pile insertion end 11 formed so that both ends of the flange of the H file 2 are inserted, and at each of both side end surfaces It can be seen that the panel is configured to include the insertion end (12).

6 is a perspective view of the PC corner block 20 according to an embodiment of the present invention. And Fig. 7 shows a plan view of the PC corner block 20 into which the H-file 2 is inserted according to an embodiment of the present invention.

6 and 7, the PC corner block 20 as a whole has a L-shaped cross-section, a pile insertion end 21 formed on the outer surface, and a panel insertion end 22 formed on each inner surface. It can be seen that it is composed of

And Figure 8 is a perspective view of the PC panel block 30 according to the embodiment of the present invention. And, FIG. 9 is a perspective view showing a state in which the PC panel block 30 is assembled between the PC corner block 20 and the PC reference block 10 according to an embodiment of the present invention.

As shown in FIG. 8 , the PC panel block 30 according to the embodiment of the present invention is in the form of a plate, and it can be seen that the protruding ends 31 are formed on both end surfaces in the longitudinal direction. Therefore, the H file 2 is coupled to the pile insertion end 11 of the PC reference block 10, and the H file 2 is coupled to the pile insertion end 21 of the PC corner block, as shown in FIG. Likewise, the PC panel block 30 is configured to be assembled and fastened between the panel insertion end 12 of the PC reference block 10 and the panel insertion end 12 of another PC reference block 10, and the PC It can be seen that the PC panel block 30 is configured to be assembled and fastened between the panel insertion end 12 of the reference block 10 and the panel insertion end 22 of the PC corner block.

Hereinafter, the construction method of the lower base structure 100 using the integrated PC panel will be described.

First, after the ground is drilled for each of the positions where the H-piles 2 are penetrated, the H-piles 2 are installed (sand-filled verticality is ensured) (S1). Figure 10 is a perspective view showing the H-pillar (2) is installed after the ground drilling according to an embodiment of the present invention.

And after transporting the PC reference block 10, the PC corner block 20, and the PC panel block 30, which are PC panels to the site, the PC corner block 20 is mounted on the H file (2) installed near the corner. , the PC reference block 10 is mounted on each of the remaining H files 2 (S2). 11 and 12 are a side sectional view and a perspective view of a state in which the PC reference block 10 and the PC corner block 20 are mounted on the H file 2 after the H file 2 is installed according to an embodiment of the present invention. it will be shown

When the mounting of the PC reference block 10 and the PC corner block 20 is completed, the foundation is first excavated. For example, about 2m is excavated (S3). 13 is a side sectional view showing a state of primary excavation of the foundation ground according to an embodiment of the present invention.

And, after completion of the first excavation, after the first press-fitting of the PC corner block 20 and the PC reference block 10, the PC panel block 30 is inserted and installed therebetween (S4).

14 is a side sectional view showing a state in which the PC corner block 20 is first press-fitted according to an embodiment of the present invention. 15 is a state in which the PC reference block 10 is first press-fitted, and the PC panel block 30 is press-fitted between the PC corner block 20 and the PC reference block 10 according to an embodiment of the present invention. A side cross-sectional view is shown. And FIG. 16 is a side cross-sectional view showing a state in which the PC panel is first press-fitted sequentially according to an embodiment of the present invention.

That is, as shown in FIGS. 14 to 16 , the PC corner block 20 is first press-fitted, the PC reference block 10 is first press-fitted, and the PC panel block 30 is installed therebetween, , after first press-fitting the PC reference block 10 in sequence, the PC panel block 30 is installed between the PC reference blocks 10 .

And after the primary press-fitting is completed (S5), the second excavation of the base of the PC panel lower side is performed (for example, about 1.5 m) (S6). Figure 17 shows a side cross-sectional view of a state in which the secondary excavation of the PC panel lower base part pressed in first according to an embodiment of the present invention.

Then, the second press-fitting of the PC corner block 20, the PC panel block 30, and the PC reference block 10 is sequentially performed (S7). Depending on the depth of construction foundation, this process may be repeated more. 18 is a side cross-sectional view showing a state in which the PC panel is secondarily press-fitted according to an embodiment of the present invention.

While the PC corner block 20, the PC panel block 30, and the PC reference block 10 are press-fitted sequentially, a temporary temporary panel 40 for retaining is installed at the upper end thereof (S8). 19 is a second press-fitting of the PC corner block 20, the PC reference block 10, and the PC panel block 30 according to an embodiment of the present invention, and a temporary temporary panel 40 for retaining is installed on the top. A side cross-sectional view of the state is shown.

20 and 21 are a side cross-sectional view and a perspective view of a state in which a temporary temporary panel 40 for retaining is installed on the upper end of the PC panel press-fitted sequentially according to an embodiment of the present invention. will be. 22 is a perspective view showing a lower foundation structure wall construction according to an embodiment of the present invention.

When the construction of the lower foundation structure wall is completed, after connecting the reinforcing bars into the inside before pouring the concrete (S9), pouring and curing the concrete (S10), the temporary panel 40 and the H file (2) It is demolished (S11), and the upper surface of the foundation is backfilled to construct the lower foundation structure 100 (S12). 23 is a side cross-sectional view of a state in which the reinforcement 110 and reinforcing bars are installed inside the lower foundation wall according to an embodiment of the present invention, and the foundation concrete is poured.

At this time, in the embodiment of the present invention before pouring the concrete, the strut tie reinforcement 110 is installed inside the wall of the foundation structure, and after assembling the reinforcing bars, the concrete is poured.

Hereinafter, the configuration and function of the strut tie reinforcement 110 according to an embodiment of the present invention will be described.

In the embodiment of the present invention, by applying the strut tie reinforcement 110, it is possible to increase the maximum load carrying capacity while reducing the thickness of the lower foundation structure (100). Due to the concrete filling effect in the strut and the role of the tie steel rod, the stress transfer in the lower foundation structure 100 is smoothly performed, so that the load carrying capacity can be improved even when the thickness of the lower foundation structure 100 is reduced.

The compression part is reinforced by the strut according to the embodiment of the present invention, and the tension part is composed of a tie using a steel bar, so that the concrete filling effect in the strut and the upper load transmitted from the tie steel copper column are more effectively transmitted through the strut to the lower part It is possible to improve the load-bearing capacity even when the thickness of the base structure 100 is reduced.

As a whole, the strut tie reinforcement 110 according to the embodiment of the present invention includes a base unit 50 having a strut tie member, and a steel box unit 90 anchored to the upper end of the base unit 50 . may be included.

24 is a perspective view showing a state in which the base unit 50 of the strut tie reinforcement 110 is installed inside the lower foundation wall according to an embodiment of the present invention.

In addition, Figure 25 is a perspective view of the base unit of the strut tie reinforcement inside the lower foundation wall according to an embodiment of the present invention, Figure 26 is the foundation of the strut tie reinforcement inside the lower foundation wall according to an embodiment of the present invention A front view of the sub-unit is shown.

First, the base unit 50 is configured to include a strut tie member, and a base anchor frame (80).

The base unit 50 according to the embodiment of the present invention is installed at the construction position of the main body 101 of the lower base structure 100 . And the strut tie member is composed of a plurality of longitudinal struts 60 and longitudinal ties 67, and a plurality of transverse struts 70 and transverse ties 77 are coupled.

27 is a plan view of a strut tie member of the base unit 50 according to an embodiment of the present invention. And Fig. 28 is a cross-sectional view taken along line A-A of Fig. 27, Fig. 29 is a cross-sectional view taken along line B-B of Fig. 27, and Fig. 30 is a perspective view of a steel box unit according to an embodiment of the present invention.

These longitudinal struts 60 and transverse struts 70 are connected in a vertical direction to each other, and the number and size of the body portion 101 and the column connection portion 102 of the constructed lower foundation structure 100 are dependent on the size. will be decided

As shown in FIGS. 27 to 29 in the embodiment of the present invention, the longitudinal strut 60 can be seen that the two longitudinal struts 60 are spaced apart from each other at a specific distance. And each of the longitudinal struts 60 is configured to include a pair of longitudinal strut portions 61 and a pair of connecting members 69 for connecting the respective upper ends of the longitudinal strut portions 61 .

And the longitudinal tie 67 is configured to tensionly connect the lower ends of the pair of longitudinal struts 61 .

And the transverse strut 70 is connected in the vertical direction of the longitudinal strut 60, and in the embodiment of the present invention, as shown in FIGS. It can be seen that it can be arranged. Each of the lateral struts 70 has a pair of lateral strut portions 71 and a connecting member 79 for connecting the pair of upper ends of the pair of lateral strut portions 71 . In addition, the transverse tie 77 is to tensionly connect the lower end of the pair of transverse struts 71 .

In addition, as shown in FIGS. 28 and 29, the longitudinal strut portion 61 and the transverse strut portion 71 have a plate shape in which the plane direction is vertically positioned.

And, the rim portion of the strut portion (61, 71) has upper end surfaces (62, 72) in the planar direction, and lower end surfaces (65, 75) in the planar direction longer than the upper surface, and is connected to the connecting members (69, 79). It has a vertical inner surface and a vertical

outer surface

64 and 74 longer than this inner surface. And it can be seen that it is composed of outer

inclined surfaces

63 and 73 connecting the

upper surfaces

62 and 72 and the outer surfaces, and inner

inclined surfaces

66 and 76 connecting the inner surfaces and the

lower surfaces

65 and 75 .

In addition,

flanges

68 and 78 are installed on the

outer surfaces

64 and 74, respectively, and the

ties

67 and 77 are connected through these

flanges

68 and 78.

In addition, the base unit 50 of the present invention includes a base anchor frame 80 installed inside the lower end of the space between the pair of longitudinal struts 60, and is disposed in the vertical direction inside the base anchor frame 80 A plurality of anchor bolts 81 are installed through the anchor bolt connection portion (82).

The steel box unit 90 according to the embodiment of the present invention is installed at the construction position of the column connection part 102 of the lower basic structure 100, and as shown in FIG. 22, the steel box ( 91), the anchor frame 92 installed inside the steel box 91, and a plurality of anchor bolt insertion members 93 coupled to the anchor frame 92 and arranged vertically. .

31 is an exploded perspective view of the base unit 50 and the steel box unit 90 according to an embodiment of the present invention. 32 is a perspective view of the strut tie reinforcement installed in the foundation structure wall according to an embodiment of the present invention. And Figure 33 shows a plan view of the strut tie reinforcement 110 according to the embodiment of the present invention. Also, FIG. 34 is a cross-sectional view taken along line A-A of FIG. 33 , and FIG. 35 is a cross-sectional view taken along line B-B of FIG. 33 .

The connection between the base unit 50 and the steel box unit 50 according to an embodiment of the present invention is performed after the base unit 50 is installed in the inner space of the base structure wall, and then the anchor of the steel box unit 90 is performed. By inserting the anchor bolt 81 of the base unit 50 into each of the bolt insertion members 93, the steel box unit 90 is connected and fastened.

Then, the body part 101 is manufactured by pouring concrete on the side of the base unit 50 , and the column connection part 102 is manufactured by pouring concrete into the steel box unit 90 .

36 is a side cross-sectional view of a state in which the temporary panel 40 and the H-pillar 2 are removed according to an embodiment of the present invention. And FIGS. 37 and 38 show a side cross-sectional view and a perspective view of the lower basic structure 100 constructed according to an embodiment of the present invention.

Claims

After inserting a plurality of files after drilling the ground, installing a PC panel on the piles to construct a PC wall;

After excavating the ground of the foundation, press-fitting the PC panel to manufacture a lower foundation structure wall;

Installing a temporary temporary panel for retaining on the top of the PC panel;

After reinforcing reinforcement inside the wall of the foundation structure, pouring concrete to construct the lower foundation structure; and

Removing the temporary temporary panel and the file; lower foundation construction method using a formwork-integrated PC panel, characterized in that it comprises a.
The method of claim 1,

The file is a lower foundation construction method using an integrated formwork PC panel, characterized in that it is an H file.
3. The method of claim 2,

The PC panel includes a PC reference block, a PC corner block and a PC panel block,

The PC panel block is a lower foundation construction method using a formwork-integrated PC panel, characterized in that it is assembled between the PC reference block and the PC corner block, and between the PC reference block and the PC reference block.
4. The method of claim 3,

The PC reference block includes a pile insertion end into which both ends of the flange of the H file are inserted along the longitudinal direction on one side of the side part, and a panel insertion end provided on each of both side end surfaces,

The PC corner block has a L-shaped cross section, and includes a pile insertion end formed on an outer surface, and a panel insertion end formed on each inner surface,

The PC panel block is in the form of a plate, and protruding ends are formed on both end surfaces in the longitudinal direction,

The H file is coupled to the file insertion end of the PC reference block, the H file is coupled to the file insertion end of the PC corner block, and between the panel insertion end of the PC reference block and the panel insertion end of another PC reference block. A PC panel block is fastened, and the PC panel block is fastened between the panel insertion end of the PC reference block and the panel insertion end of the PC corner block.
5. The method of claim 4,

The steps of manufacturing the lower foundation structure wall,

After penetrating the H file, a first step of mounting the PC corner block and the PC reference block to the top of each of the H files;

a second step of excavating the foundation; and

A third assembling by sequentially press-fitting the PC corner block and the PC reference block, and inserting the PC panel block between the PC corner block and the PC reference block and between the PC reference block and another PC reference block adjacent to the PC reference block A lower foundation construction method using a formwork-integrated PC panel, comprising: a.
6. The method of claim 5,

Using a form-integrated PC panel, characterized in that it further comprises a fourth step of excavating the lower ground and repeating the steps of sequentially pressing the PC corner block, the PC panel block, and the PC reference block according to the basic grain size How to construct the lower foundation.
The method of claim 1,

In the step of constructing the lower foundation structure,

A lower foundation construction method using a formwork-integrated PC panel, characterized in that the strut tie reinforcement is installed inside the wall of the foundation structure, reinforcing bars are assembled, and then concrete is poured to construct the lower foundation structure.
8. The method of claim 7,

The strut tie reinforcement is

a foundation unit having a strut tie member; and a steel box unit anchored to the upper end of the base unit.

The base unit includes at least two longitudinal struts installed at the construction location of the main body of the lower foundation structure and having a pair of longitudinal struts and a connecting member for connecting the upper ends of the pair of longitudinal struts; , a longitudinal tie for tensionally connecting the lower ends of the pair of longitudinal struts, and a connecting member for connecting a pair of transverse struts and respective upper ends of the pair of transverse struts, the longitudinal strut and A method of constructing a lower foundation using a formwork-integrated PC panel, comprising: at least two cross-connected transverse struts;
9. The method of claim 8,

Each of the longitudinal strut portion and the transverse strut portion,

The plane direction is vertically positioned and has a plate shape, and the edge portion has an upper surface in a planar direction, a lower surface in a planar direction longer than the upper surface, an inner surface in a vertical direction connected to the connecting member, and a vertical direction longer than the inner surface. A lower foundation construction method using an integrated formwork PC panel, characterized in that it consists of an outer surface, an outer inclined surface connecting the upper surface and the outer surface, and an inner inclined surface connecting the inner surface and the lower surface.
10. The method of claim 9,

A foundation anchor frame installed inside the lower end of the base unit, and a plurality of anchor bolts disposed in the vertical direction inside the foundation anchor frame,

The steel box unit is installed at the construction position of the column connection part of the lower base structure,

Using a form-integrated PC panel comprising: a steel box with open upper and lower portions; an anchor frame installed inside the steel box; and a plurality of anchor bolt insertion members coupled to the anchor frame and arranged vertically. How to construct the lower foundation.
11. The method of claim 10,

The connection between the base unit and the steel box unit is

Formwork integration, characterized in that after the foundation unit is installed in the inner space of the foundation structure wall, the anchor bolt of the foundation unit is inserted into each anchor bolt insertion member of the steel box unit to connect and fasten the steel box unit A method of constructing a lower foundation using a PC panel.