KR101084615B1 - Lathe type breast wall structure for using PC wall plate and construction method thereof - Google Patents

Abstract

The present invention is a base concrete plate embedded in the bottom ground along the longitudinal direction of the lower end of the slope of the installation position and the base portion is formed so that the vertical reinforcing bar assembly for wall connection from the base concrete plate is long exposed, PC wall plate on the upper surface of the base portion In the shelf retaining wall structure in which the vertical portion is installed vertically connected to the left and right, and the shelf portion connected horizontally integrally from the wall portion buried in the slope ground, the wall portion is a projection jaw and the left and right corners, respectively, Left and right neighboring PC wallboards assembling and connecting concrete plates formed with fitting grooves and flat surfaces, and supporting walls and side projections, which are positioned in the vicinity of the left and right ends of the backplate, respectively, and are symmetrical with each other. It is formed so as to be integrally connected with the foundation by forming a column between the connection portion and The shelf part is installed so that one end is integrally assembled to the reinforcing bar assembly in the column formed between the connection part between the PC wall plates and is integrally connected to the wall part. The present invention has the effect that the bending moment acts on the plate body in the form of fixed ends at both ends of the concrete formed in the column formed in the connection joint portion between the PC wall plates to increase the support force to increase the stability of the structure.

Foundation, shelf, PC wall plate, plate, support wall, protrusion, column, bending moment

Description

Lathe type breast wall structure for using PC wall plate and construction method

The present invention relates to a shelf retaining wall structure using a PC wall plate and a construction method thereof, and more particularly, to form a support column embedded in the ground at both left and right ends of the PC wall plate in fixing the PC wall plate of the retaining wall in the ground. This improves the supporting force at the joints, facilitates the installation and construction of the PC wall plate, and reduces the manufacturing cost of the PC wall plate by forming fixed ends at both ends of the PC wall plate. It relates to a shelf retaining wall structure using a PC wall plate and a construction method thereof.

Generally, the retaining wall is a structure for stably supporting slopes formed naturally or artificially in mountainous areas or riversides to prevent the occurrence of collapse accidents.Greatly retaining wall, anti-gravity retaining wall, and T-type depending on its structure and shape It is divided into retaining wall, L-shaped retaining wall, subwall retaining wall, shelf retaining wall, and the like.

In general, the retaining wall structure is known to construct formwork at the installation location, reinforce the reinforcing bar assembly, and then to construct the retaining wall structure by the site casting concrete method by placing concrete, and such retaining wall construction technology requires a large installation cost such as installing a temporary material. In addition, there is a problem that the construction period is long.

In order to solve this problem, the present applicant manufactures the retaining wall PC wall board as a field product and installs the shelf retaining wall at the construction site in order to stabilize the slope. Patent No. 0824713 (registered on April 17, 2008) describes the "PC wall board." Shelf retaining wall and its construction method "have been proposed.

The technique of the shelf retaining wall and its construction method using the pre-patent PC wall plate is a horizontal shelf portion on the inner surface of the wall portion 2 erected on the base portion 1 as shown in FIG. (3), wherein the wall portion (2) is each formed of reinforced concrete and protruded in a tubular shape on the inner surface of the plate (2a), and erected up and down, the column having a connection support portion (2c) formed near the middle portion ( A plurality of PC wall plates (2A, 2B) having a 2b), the PC wall plates (2A, 2B) are continuously standing on the base (1) and assembled into a reinforced concrete filled in the column (2b) the base It is installed so as to be integrally connected with (1), the shelf portion (3) has one side end of the open passage-type connection support portion formed at a height higher than the middle portion of the PC wall plate (2A, 2B) of the wall portion (2) It is installed so as to be connected and supported with the reinforced concrete filled in the column (2b) through (2c) .

On the other hand, the PC wall plate 2A used for the shelf retaining wall, as shown in Fig. 2, a rectangular plate body 2a having a flat front face and a widthwise middle position perpendicular to the rear surface of the rectangular plate body 2a. A column 2b is formed so as to protrude into a tubular shape of a hollow rectangular cross section, and a passage-type shelf part connecting support part 2c is opened so as to be connected to the shelf part 3 at the middle part of the tubular shape.

In the shelf retaining wall structure using the PC wall plate, as shown in FIGS. 3A to 3E, the foundation reinforcing bars 1a are horizontally disposed in the foundation form A assembled after digging and compacting adjacent to the corresponding positions. By placing the vertical reinforcing bar assemblies (1b) for wall connection vertically at regular intervals while reinforcing, the foundation reinforcing bar (1a) is embedded and the concrete is cast in place so that the vertical reinforcing bar assemblies (1b) for wall connection are exposed. (1) installing the base portion to install;

Lower PC wall plates 2A each having a tubular protrusion protruding upward and downward on the inner surface of the rectangular plate body 2a, and forming a column 2b with the upper end of a position lower than the upper end of the plate body as the end-type connecting support portion 2c. And a PC wall plate formed of an upper PC wall plate 2B having a column 2b that protrudes in a tubular shape and stands up and down on the inner surface of the square plate body 2a, wherein the foundation form A is dismantled. The lower PC wall plate 2A is erected on the foundation 1 so that the vertical reinforcing bar assembly 1b for wall connection is fitted in the column 2b, and the concrete is connected to the end connection support 2c in the column 2b of the lower PC wall plate. A lower PC wall plate installation step of installing the lower PC wall plates 2A by pouring the same;

Lathe horizontal reinforcing bar assembly 3a from the vertical reinforcing bar assemblies 1b for wall connection in a lathe formwork assembled after backfilling and compacting the soil to the outer upper end of the connecting support part 2c formed in the lower PC wall plate 2A. The step of installing the shelf to install the shelf (3) is formed by connecting the reinforcement and pouring concrete;

The upper PC wall plate 2B is continuously placed on the shelf while the vertical wall assembly 1b for wall connection exposed to the upper part of the shelf part 3 is fitted in the column 2b, and the column of the upper PC wall plate ( 2b) the installation of the upper PC wall plate to complete the wall portion 2 by pouring concrete to the upper end; was done by sequentially.

Such a shelf retaining wall structure using a conventional PC wall plate has the advantage that it can be installed without cutting the amount of soil cut off, traffic road blocking, as shown in Figure 4 connecting the PC wall plates (2A, 2B) The position of the joint is constructed in a structure located in the middle between the columns 2b serving as support pillars.

In other words, the column 2b is positioned at the middle of the PC wall plate 2a and becomes a fixed end, and the joint portions located at both ends of the plate 2a have a free-formed cantilever-shaped wall structure 2A. , 2B) caused an uneconomical problem of increasing the thickness of the PC wallboard due to the structural stability problem of weakening the support strength at the joint position.

In addition, the conventional retaining wall structure using the PC wall plate is formed by the position of the tubular support pillar to be fixed in the ground of the PC wall plate is located in the middle of the back of the plate body, thereby forming a column during the site fabrication of the PC wall plate Due to the narrow space for installation and demoulding of the formwork, there is a problem of difficulty in handling and construction efficiency.

In addition, the installation of the drainage drain board nonwoven fabric in the joint portion between the adjacent PC wall plates is required to closely adhere to the PC wall plate during the installation of the retaining wall, which leads to a decrease in the efficiency of construction and a problem of increasing the construction period. there was.

Accordingly, the present invention is to solve the conventional problems as described above, the object of the present invention is to form a column to integrally connect the structure of the wall portion and the shelf portion at the joint position which is a weak part of the retaining wall to be settled in the ground As a result, the retaining wall structure using the PC wall plate and its construction which improves the efficiency of construction due to the assembly and installation are not required because it not only has structural stability by improving the supporting force at the joint portion, but also no formwork for forming the support pillar. In providing a method.

Another object of the present invention is to be able to economically manufacture the plate thickness of the PC wall plate by forming the support pillar by the concrete is filled in the position of the connection portion with the adjacent PC wall plate on both sides of the PC wall plate to act the bending moment by the two fixed ends. The present invention provides a shelf retaining wall structure using a PC wall board and a construction method thereof.

Another object of the present invention is to increase the efficiency and productivity of the formwork installation and demoulding on both sides of the PC wall plate in forming the retaining wall concrete PC wall plate as a field product, easy to handle transportation, drainage during the construction process It is to provide a shelf retaining wall structure using a PC wall plate and its construction method that shorten the construction period and reduce the construction cost since there is no need to install drains, formwork, clubs and scaffolding.

Still another object of the present invention is to install a drainage gutter which does not need to install the joints of the upper and lower left and right joints and drains the surface of the retaining wall, thereby improving the aesthetics, and thus the shelf retaining wall structure using the PC wall plate which is easy to maintain and its construction. In providing a method.

In order to achieve the above object, the shelf type retaining wall structure using the PC wall plate of the present invention is fixed in the foundation concrete plate and the foundation concrete plate embedded in the bottom ground along the longitudinal direction of the lower end portion of the installation position at regular intervals. The base portion is formed so that the vertical reinforcing bar assemblies for wall connection to the upper side, the wall portion is installed vertically connected to the PC wall plate vertically on the upper surface of the base portion, and the vertical reinforcing bars for wall connection at a predetermined position of the wall portion In a shelf retaining wall structure in which a shelf part formed by pouring concrete into a horizontal rebar assembly integrally connected to the assembly is buried and fixed in sloped ground, the wall part has protrusion jaws and fitting grooves formed at left and right edges, respectively, and has a flat front surface. Plate and the symmetrical with each other while being positioned near the left and right both ends of the back While connecting and connecting concrete PC wall plates that form up and down support walls and side protrusions, a column is formed between connecting parts with left and right adjacent PC wall plates and installed to be integrally connected with the foundation part. It is characterized in that the concrete is placed in the column formed between the connecting portion between the PC wall plate is installed so as to be integrally connected with the wall portion.

Shelf type retaining wall structure using the PC wall plate of the present invention, the column formed between the connecting portion with the left and right adjacent PC wall plates to accommodate the vertical reinforcing bar assembly exposed to the upper side from the base by tubular protrusion projected into the slope ground, The concrete is poured into the internal space of the column, and the foundation portion and the wall portion are formed into an integral structure.

In the shelf retaining wall structure using the PC wall plate of the present invention, the wall portion is composed of a lower PC wall plate and an upper PC wall plate, the upper PC wall plate is assembled to the lower PC wall plate by the upper and lower step couplings, respectively near the rear end of the plate body, respectively. The upper reinforcing wall assembly of the shelf part is connected to the vertical reinforcing bar assembly for wall connection extending upward from the base between the upper and lower PC wall plates by the upper end of the supporting wall and the lateral protrusion of the PC wall plate located. It is assembled and cast concrete, characterized in that the wall portion and the shelf formed in an integral structure.

In the shelf retaining wall structure using the PC wall plate of the present invention, the side wall haunches on both sides of the PC wall plate at the upper and lower positions of the side haunches formed between the pair of support walls integrally formed on both sides of the inner surface of the plate body and the plate body. It characterized in that a plurality of double holes to penetrate through.

In the shelf type retaining wall structure using the PC wall plate of the present invention, the PC wall plate is formed with a drainage through hole penetrating back and forth through the plate body at the lower middle position of the plate body, and induces drainage perpendicular to the surface of the plate body directly below the drainage hole. A groove is formed.

In addition, in the construction method of the shelf retaining wall using the PC wall plate of the present invention, the trench concrete is laid along the bottom end of the slope, and then laid down the concrete to install the foundation formwork on the upper side to reinforce the reinforcing bar assembly in the interior And reinforce the concrete by laying vertically connected vertical reinforcing bar assemblies, which are connected vertically at equal intervals of the reinforcing bar assemblies, and the reinforcing bar assemblies are buried and the vertical reinforcing bar assemblies for wall connection are exposed upward. A step of installing a foundation in which concrete plates are embedded in the ground floor; By transporting a plurality of lower PC wall plates manufactured in the field so that the lower end of the plate body of the lower PC wall plate is seated in the fitting groove formed on the upper surface of the base concrete plate while assembling each other in the left and right direction with the plate fittings of the PC wall plate, The vertical reinforcing bar assembly for wall connection embedded in the base concrete plate is installed in a column formed in a tubular protrusion by a combination of a pair of support walls and lateral protrusions formed symmetrically on both sides of the inner surface of the plate. Thereafter, the installation step of the wall portion to install concrete connected to the left and right adjacent lower PC wall plates by placing concrete in the inner space of the column; After filling and compacting the earth and sand to the outer top of the column formed by the assembly of the lower PC wall plate, laying the discarded concrete, and then installing the formwork for the shelf to integrate the horizontal reinforcing bar assemblies for the wall connection from the vertical reinforcing bar assemblies for the wall connection Connecting, the installation step of the shelf portion formed by pouring concrete so that the horizontal reinforcing bar assemblies for embedding the shelves; characterized in that to perform sequentially.

In addition, in the method of constructing a shelf retaining wall using the PC wall plate of the present invention, after the shelf part installation step, the upper PC wall plate is carried to the upper side of the lower PC wall plate so that the lower end of the plate body of the upper PC wall plate to the upper plate body of the lower PC wall plate The lower PC is a column which is erected on the shelf and aligned with each other between the left and right adjacent upper PC wall plates, while the plates are chin-fitted to each other by a combination of both side support walls and side protrusions on the inner side of the plate. After assembling to match the column formed by the wall plate, it is characterized in that it further comprises the step of installing the upper PC wall plate to form the wall portion to the upper portion by placing concrete in the column.

Accordingly, in the present invention, concrete is poured into a column serving as a support pillar at both ends of the PC wall plates, and thus the shelf retaining wall using the PC wall plate is configured so that the bending moment acts on the PC wall plate in the form of the fixed end support. It is possible to improve the supporting force and supporting strength at the joint part than the shelf retaining wall using the PC wall plate configured to act the bending moment on the PC wall plate in the form of a cantilever beam, thereby increasing the stability of the structure.

In addition, as in the prior art, the column is not formed in a completed form at the inner middle portion of the PC wall plate, but the PC wall plate is assembled in the left and right directions by a pair of support walls and side protrusions formed on both sides of the inner surface of the PC wall plate. By being formed on both sides of the inner side of the PC wall plate in the process there is an advantage that the easy installation and demoulding, as well as easy handling in the field fabrication of the PC wall plate.

As described above, the present invention has the advantage of improving the efficiency and productivity of the production by manufacturing the formwork and demoulding, transport handling on both sides of the PC wall plate in forming the retaining wall concrete PC wall plate as a field product There is this.

In addition, the tubular column is formed by fitting with the adjacent PC wall plate at the left and right ends of the rear wall of the PC wall plate, and the concrete is poured into it and formed integrally, so that the wall part of the PC wall plate is acted by the bending moment action by both fixed ends. Since the thickness can be manufactured to an appropriate thickness, the manufacturing cost can be reduced.

On the other hand, in the joint part, which is a weak part of the retaining wall, it forms a support pillar that integrally connects the structure of the wall part and the shelf part to be fixed in the ground, thereby improving the supporting force at the joint part, and having structural stability as well as assembly and installation. It has the effect of improving the efficiency in construction.

In addition, it is not necessary to install drainage drains, formwork, bundling, scaffolding, etc. during the construction process, and it also has the effect of reducing the construction period and reducing the construction cost by reducing the amount of cut and backfill soil.

Other up and down joints are not required to install the joint, and by installing a drain gutter to induce drainage on the retaining wall surface to enhance the aesthetics, thereby ensuring the ease of maintenance.

The present invention is settled in the base concrete plate 11 and the base concrete plate embedded in the bottom ground along the longitudinal direction of the lower end of the slope of the installation position so that the vertical reinforcing bar assembly (B) for wall connection to the upper side at regular intervals long exposure The base part 10 is formed, the wall part 20 is installed on the upper surface of the base part is vertically connected and assembled to the left and right, and the wall reinforcement assembly (B) for wall connection at a predetermined position of the wall part In the point of forming the shelf retaining wall structure in which the molded shelf part 30 is embedded in the sloped ground by pouring concrete into the horizontal rebar assembly C connected to the shelf, the technical concept is the same as the prior patent technology. .

However, the shelf retaining wall structure using the PC wall plate according to the present invention is symmetrical in the vicinity of both ends of the rear surface of the plate body 21 of the PC wall plate 20A, 20B when the PC wall plate 20A, 20B is assembled by tucking the left and right directions. As the support walls 24a and 24b and the side protrusions 25a and 25b formed in the shape of the support walls 24a and 24b and the side protrusions 25a and 25b of the adjacent PC wall plate are connected and assembled to each other, (26) is characterized in that the vertical reinforcing bar assembly (B) for the wall connection is accommodated therein to serve as a support pillar that concrete is poured and embedded in the ground.

That is, the present invention does not form a column 26 in the PC wall boards 20A and 20B itself, but in a tubular shape in a tubular shape by connection assembly with adjacent PC wall plates at positions of both ends of the PC wall boards 20A and 20B. A protruding column 26 is formed to function as a support pillar, so that the bending moment acts on the PC wall plates 20A and 20B in a fixed end support form at both ends to compensate for the weakness of the joint portion, and a separate formwork is required. Its features are that it disappears.

Hereinafter, a shelf type retaining wall structure using a PC wall plate according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 5, the foundation 10 is provided with the foundation concrete plate 11 embedded in the bottom ground in the longitudinal direction along the lower end of the slope at the position where the retaining wall is installed. It is a structural part that stably supports the wall part 20 which is erected vertically to the upper side.

The foundation portion 10 is disposed along the lower end of the slope of the corresponding position, the discarded concrete is laid flat on the ground of the compacted base, there is provided a foundation formwork (F1) for forming the foundation concrete plate 11 thereon Next, reinforce the foundation reinforcing bar assembly (A) thereon and connected to the foundation reinforcing bar assembly (A) to vertically reinforce the vertical reinforcing bar assembly (B) for wall connection at a predetermined interval to protrude upwards, and then the concrete Pour.

At this time, by connecting the bar for forming the fitting groove 12 on the concrete pour surface at the front bottom of the vertical reinforcing bar assembly (B) for wall connection to the base formwork (F1) formed into the base concrete plate 11 formed with the fitting groove 12 Then, the periphery of the base concrete plate 11 is backfilled with earth and sand and installed to be embedded in the bottom ground.

This basic concrete plate 11 is a wall-mounted vertical reinforcing bar assembly (B) is revealed that it can be manufactured and installed as a PC base plate of the field product exposed to a certain length upwards,

The base concrete plate 11 is embedded in the reinforcement for the reinforcing bar (A) reinforcement in the cross-section of the base concrete, and the lower end of the plate body 21 of the PC wall plate 20A is seated on one side of the upper surface of the base concrete plate 11 The fitting groove 12 is formed, and the space remaining after the plate body 21 of the PC wall plate 20A, 20B is seated in the fitting groove 12 is filled with non-shrink mortar is fixed so as not to flow.

As such, when the fitting groove 12 is formed on the base concrete plate 11 to seat the lower end of the plate 21 of the PC wall plate 20A, the PC wall plates 20A are crooked when the wall portion 20 is installed. At the same time, the lower end of the plate body 21 of the PC wall plates 20A of the wall portion 20 which is subjected to earth pressure after installation is prevented from being displaced from the basic concrete plate 11.

On the other hand, the base concrete plate 11 is a plurality of vertical reinforcing bar assembly (B) for connecting wall reinforcement is embedded in the foundation reinforcing bar 12 reinforcement in the cross-section of the base concrete, and long exposed upward from the base reinforcing bar 12 ) To protrude. At this time, the length of the vertical reinforcing bar assembly (B) for wall connection has a length that is exposed to a certain height from the top of the wall portion 20 to be described later.

The wall portion 20 is installed as a PC wall plate (20A, 20B) of the field production so that the lower end of the plate body 21 is fitted into the upper side of the fitting groove 12 of the base concrete plate 11 of the base portion 10 As a structure for supporting the earth pressure acting in the ground, the plate body 21 is formed in a certain width and thickness on the front surface and the support wall (24a, 24b) protruding orthogonally toward the ground in the vicinity of both ends of the rear surface of the plate body, respectively; PC wall boards 20A and 20B having lateral protrusions 25a and 25b formed symmetrically with each other are manufactured as field products, and are fitted into the fitting grooves 12 of the base concrete plate 11, and the left and right adjacent PC wall boards 20A and 20B. The column 26, which is a connecting joint part, is formed between the c) and the concrete is poured therein, whereby the foundation 10 and the wall 20 are joined in an integral structure to support the ground of the slope.

The PC wall plates 20A and 20B are manufactured as on-site products, whereas the column is located at the center of the rear surface of the existing plate, so that the space for installing and demolding the formwork for forming the column is insufficient. The PC wall plates 20A and 20B of the present invention have support walls 24a and 24b for column formation at both ends, which are connection joints between the plates, so that the formwork and demolding space are sufficient in the field fabrication for easy handling. In addition, the column 26 is formed by fitting between the left and right adjacent PC wall plate is made of a structure that does not require a separate formwork for column molding.

As shown in FIGS. 6A to 6C, the PC wall plates 20A and 20B have side lateral portions 27 formed between the plate body 21 and the support walls 24a and 24b, and Double holes 28 penetrating both sides in the upper and lower sides are formed, respectively.

Therefore, when transporting the field-produced PC wall plates 20A, 20B to assemble on the base 10, the bolts are inserted in the double holes 28, and the chain is connected to both ends of each bolt to hoist the crane. By hooking it, the PC wall boards 20A and 20B can be transported and handled.

Further, in the PC wall plates 20A and 20B according to the present invention, as shown in FIGS. 6B and 6C, a drain through hole 28a penetrating the plate 21 in the front-rear direction is formed in the middle lower side of the plate 21. In addition, a vertical induction groove 28b is formed on the outer surface of the lower plate 21 of the drainage through hole 28a to drain the water penetrated into the slope.

At this time, by assembling the drainage hole 28a in the middle lower side of the plate body 21 of the PC wallboard 20A, 20B and adhering the drainage drain board nonwoven fabric to the inner surface in advance, the conventional PC wallboard assembly is performed. During the construction, additional installation work that requires the drainage drain board nonwoven fabric to be installed in close contact with the inside of the plate body is not required. Therefore, the workability can be improved, and the water permeated into the slope ground is applied to the PC wall boards 20A and 20B. This prevents the hydraulic pressure.

As shown in FIGS. 5, 7A, and 7B, the connecting assembly is assembled near both ends of the plate body 21 of the PC wall plates 20A and 20B, thereby connecting the PC wall plates 20A and 20B to the upper and lower and left and right connections. It is possible to assemble. That is, PC wall plate 20A between left and right and up and down by assembling the left and right up and down protruding jaws 22a and 22b and the left and right up and down fitting grooves 23a and 23b along the periphery of the outer surface of the plate body 21 to be aligned with each other. 20B) is connected and installed.

As described above, the PC wall boards 20A and 20B manufactured in the field are continuously assembled to the left and right on the base concrete plate 11, so that the left and right PC wall boards 20A and 20B are positioned at the rear end portions of the PC wall boards 20A and 20B. Hollow squares for receiving wall-mounted vertical reinforcing bar assemblies B extending upward from the base concrete plate 11 by fitting the support walls 24a and 24b and the lateral protrusions 25a and 25b therebetween. A column 26 of cross-sectional shape is formed.

In this way, the horizontal shelf for the wall to be described later in the vertical reinforcing bar assembly (B) for wall connection accommodated in the column 26 formed at the rear end portions of the PC wall plates (20A, 20B) exposed to the upper end of the PC wall plates (20A, 20B) By connecting and reinforcing the reinforcing bar assembly C, concrete is poured into the space part and the shelf part 30 in the column 26 so that the wall part 20 and the shelf part 30 are embedded in the ground in an integrated structure. .

Therefore, both end joint portions of the PC wall plate 20A are connected in an integral structure by a column 26 serving as a support pillar, and an upper end portion of the PC wall plate 20A is horizontally buried and fixed in the ground. It is connected and supported integrally with 30.

Accordingly, each of the PC wall plate 20A, 20B is subjected to the action of the bending moment that both ends are supported in the form of a fixed end, thereby improving the supporting force at the joint portion.

As shown in FIG. 5, the shelf part 30 is installed in the sloped ground so as to hold the entire structure of the wall part 20 on both sides of the PC wall plates 20A and 20B. As a structural part that does not fall, when the PC wall boards 20A and 20B are installed on the foundation concrete plate 11, the slope of the ground side is flattened near the height of the upper end of the PC wall boards 20A and 20B. After laying, connecting the horizontal reinforcing bar assembly (C) for the shelf to the vertical reinforcing bar assembly (B) for wall connection projecting in the column 26, and cast concrete to the column 26 of the wall portion 20 It is joined by the structure of integration with.

That is, as shown in FIGS. 5C and 8, the left and right fitting grooves 22b formed in the plate body 21 of one side PC wall plate 20A, 20B are formed in the plate body 21 of the other side PC wall plate 20A, 20B. The left and right protruding jaws 22a are tucked together to assemble the PC wall plates 20A and 20B in the left and right directions, and as shown in FIG. 7D, the upper and lower parts of the upper plate 21 of the lower PC wall plate 20A are formed. The upper and lower projection wall 23a formed at the lower end of the plate body 21 of the upper PC wall plate 20B is chin-fitted to the direction fitting groove 23b, thereby assembling between the upper and lower PC wall plates 20A.

The PC wall plates 20A and 20B according to the embodiment of the present invention are mounted on the fitting groove 12 formed on the upper surface of the base concrete plate 11 at the lower end of the plate body 21 of the lower PC wall plate 20A. The lower PC wall plate 20A is assembled on the base portion 10 in the lateral direction by the chin alignment between the left and right protruding jaws 22a and the fitting grooves 22b formed along the outer circumference of the 21.

At this time, inside the PC wall plate 20A, a pair of support walls 24a and 24b and side projections 25a and 25b which are symmetrical to both sides of the inner surface of the plate body 21 of the lower PC wall plate 20A are provided on the other side. A hollow rectangular cross-sectional column 26 is formed while contacting the support walls 24a and 24b and the side protrusions 25a and 25b formed on both sides of the inner plate 21 of the assembled lower PC wall plate 20A. The vertical reinforcing bar assembly (B) for wall connection extending from the base portion 10 is positioned in the inner space of the column 26, and is connected between the lower PC wall plates 20A by pouring concrete.

Then, the concrete is placed so that the vertical reinforcing bar assembly B for wall connection is embedded inside the column 26 of the assembled lower PC wall plates 20A, and then the lower PC wall plates 20A are installed. ) Is connected to the upper reinforcing bar assembly (B) for wall connection exposed upward from the column (26) with the shelf part 30 is installed, and the upper assembly part of the upper plate 21 of the lower PC wall plate (20A) That is, the upper and lower projection jaw 23a and the fitting groove 23b of the plate body 21 of the upper PC wall plate 20B and the fitting groove 23b are chin-fitted to the vertical projection jaw 23a and the fitting groove 23b, and the left and right directions By assembling the plate body 21 of the upper PC wall plate 20B to each other.

At this time, the vertical reinforcing bar assembly B for wall connection on the shelf part 30 is assembled to fit in the column 26 formed while assembling the upper PC wall plates 20B in the left and right directions, and then the concrete in the column 26 again. By installing and assembling and installing the wall portion 20 to be stacked up and down and to the left and right to successively, by stacking the lower and upper PC wall plate 20B on the base portion 10 to the PC wall plate (20A, 20B) wall portion According to the height of (20) it is to allow easy and robust connection and installation.

As shown in FIG. 7A, in the process of assembling the PC wall plates 20A and 20B in a horizontal direction, the column 26 is formed at positions of both joint portions of the PC wall plates 20A and 20B. The bending moment acts on the plate body 21 of the PC wall plate 20A, 20B in a form in which both ends of the PC wall plate 20A, 20B are supported, i.e., fixed ends, thereby acting on the plate body 21. Significant reduction can be made to improve the bearing capacity.

For example, as shown in Fig. 7B, the PC wall plates 20A and 20B of the present invention have a length L of the plate body 21, at which both ends receive a bending moment as a fixed end, of 1.352 m. As shown in Fig. 4, 2B) is a fixed end in the center portion, and the length L of the plate receiving the bending moment as the free end is 0.676 m, and each bending moment is as follows.

PC wall plate (20A, 20B) of the present invention is applied to the bending moment formula according to the fixed end of both ends,

이고,

ego,

In the conventional PC wall boards 2A and 2B, when the bending moment formula according to the form of the cantilever information of the fixed end and the both fixed ends of the center part is applied,

가 된다.

Becomes

(W is the equal distribution of earth pressure acting on the plate.)

Therefore, when comparing the bending moment acting on the plate body of the present invention and the conventional PC wall plate, the present invention: conventional = 0.1523: 0.2284, since the present invention is supported even if the bending moment acts only 67% compared to the prior art, that is, Since the PC wall plate of the present invention has a 33% or more reduction in cross-sectional resistance due to earth pressure than conventional PC wall plates, the PC wall plate can be manufactured by lowering the cross-sectional thickness of the PC wall plate, thereby reducing the manufacturing cost.

On the other hand, the construction method of the shelf retaining wall structure using a PC wall plate according to an embodiment of the present invention, as shown in Figure 8a to 8e, the base portion installation step-lower PC wall plate installation step-shelf installation step-upper PC wallboard installation steps should be performed sequentially.

< Foundation  Installation Steps>

After digging the ground horizontally along the lower end of the slope at the position where the retaining wall is to be installed, the concrete is laid flat on the ground of the compacted foundation, and then the foundation formwork (F1) is assembled on the concrete. Reinforcing the rebar assembly (A) for the foundation in the foundation formwork (F1) while reinforcing the vertical reinforcing bar assemblies (B) for the vertical connection at equal intervals horizontally, placing the concrete reinforcement (A) Is embedded to form the base concrete plate 11 so that the vertical reinforcing bar assembly B for wall connection is exposed to install the base 10.

The base concrete plate 11 is the width of the lower PC wall plate 20A is embedded in the ground so that the column is buried in the bottom ground, a certain length protruding to form a front of the plate, and buried in the bottom ground vertically for wall connection The fitting groove 12 is formed at a position corresponding to the lower end of the plate body 21 of the lower PC wall plate 20A to be described later on the upper surface of the front fixed position where the rebar assembly B is exposed.

<Lower part PC wallboard  Installation Steps>

A plurality of lower PC wall plates 20A manufactured in the field are transported and vertically inserted into the fitting grooves 12 of the base concrete plate 11 so as to be connected in the left and right directions, and the other lower part adjacent to the lower PC wall plate 20A. At the connecting portion of the PC wall plate 20A, the supporting walls 24a and 24b and the lateral protrusions 25a and 25b which are formed symmetrically on both sides of the inner surface of the plate 21 are in contact with each other and are vertically connected to the wall exposed from the base concrete plate 11. While accommodating the reinforcing bar B, a square cross-sectional column 26 is formed, and concrete is poured into the column 26 to install the lower PC wall plate 20A to be integrally connected with the foundation 10. do.

The lower PC wall plate 20A is transported through a bar through a double hole 28 formed on both sides of upper and lower inner side haunches 27 of the lower PC wall plate 20A, and the ends of the chain are fastened to both ends thereof. It hangs on hoist hook of crane and lifts whole PC wall board.

When the PC wall plate is set up vertically, the bar is placed only on the double hole formed in the upper side and moved to the position where the hoist of double crane is installed by the chain.

The lower portion of the plate body 21 of the transported lower PC wall plate 20A is seated in the fitting groove 12 formed on the upper surface of the base concrete plate 11, wherein the PC wall plate 20A, which is seated in the fitting groove 12 The space inside the remaining fitting grooves 12 of the plate body 21 of 20B is filled with non-contraction mortar to fix the PC wall plates 20A and 20B.

In addition, the lower PC wall plate 20A on which the plate body 21 is seated and fixed to the fitting groove 12 of the base portion 10 is formed by the left and right projection jaw 22a and the fitting groove 22b of the connection assembly portion. Assembled in left and right direction by fitting.

The lower PC wallboard is formed by filling concrete into the column 26 containing the vertically reinforced bar assembly B for wall connection extending upward from the base steel bars formed on both inner sides of the assembled lower PC wallboard 20A. 20A) will be installed on the base 10.

< Shelf  Installation Steps>

After filling the earth and sand to the outer upper end of the column 26 formed by the assembly of the lower PC wall plate 20A and laying the discarded concrete flat on the compacted floor, assembling the shelf formwork (B) on the discarded concrete, The shelf 30 is installed by placing the horizontal horizontal rebar assemblies C in the assembled shelf formwork F2 and connecting the vertical rebar assemblies B for wall connection to cast concrete. After that, the soil is filled back. Accordingly, the shelf portion is embedded in the slope ground and the earth pressure is distributed up and down.

Although the retaining wall structure is completed by the above steps, it is clear that when the height of the retaining wall is high, the upper PC wall plate may be added and installed on the lower PC wall plate.

<Upper part PC wallboard  Installation Steps>

In this step, as in the case of installing the lower PC wall plate 20A, the upper PC wall plate 20B manufactured in the field is transported to stand on the shelf part 30 to complete the wall part 20, and the upper part carried by the crane The PC wall boards 20B are formed in the upper and lower projection jaw 23a and the fitting groove 23b formed at the upper end of the lower PC wall board 20A, and the vertical projection jaw 23a and the fitting groove formed at the lower end of the upper PC wall board 20B. (23b) is to be assembled up and down by fitting the jaw, and the left and right protruding jaw 22a and the fitting groove 22b of the other upper PC wall plate 20B to the left and right protruding jaw 22a and the fitting groove 22b. It is assembled left and right by fitting.

At this time, like the lower PC wall plate 20A, the upper PC wall plate 20B is also assembled in the left and right directions, and a pair of support walls 24a and 24b formed on both sides of the inner surface of the plate body 21 of the upper PC wall plate 20B and the side surfaces thereof. Hollow square cross-sectional shape where the protrusions 25a and 25b are combined while contacting the support walls 24a and 24b and the side protrusions 25a and 25b formed on both sides of the inner surface 21 of the adjacent upper PC wall plate 20B. To form a column 26.

After the vertical reinforcing bar assembly B for wall connection is received on the shelf part 30 in the column 26, the concrete is poured to connect the shelf part 30, the lower PC wall plate 20A, and the base part 10 integrally. By supporting it, the wall part 20 is completed, and after that, a series of retaining wall construction is completed by backfilling the earth and sand on the inner ground of the wall part 20 on the shelf part 30.

As described above, in the shelf retaining wall structure using the PC wall plate according to the present invention, the PC wall plate is formed in a column formed between the adjacent PC wall plate in the vicinity of both ends, so that both columns act as a supporting column in the form of a fixed end. The bending moment acts on the PC wallboard between the fixed ends of the joints to improve the bearing capacity of the joint part, which is a weak part of the retaining wall structure.

1 is a partially cut perspective view showing a shelf retaining wall using a conventional PC wall plate,

2A and 2B are perspective views showing PC wall plates installed in a conventional retaining wall;

3 is a cross-sectional view of a shelf retaining wall structure using a conventional PC wall plate,

4 is a view showing a bending moment acting on a conventional PC wall plate,

5 is a partially cutaway perspective view showing a shelf retaining wall structure using a PC wall plate according to the present invention,

Figure 6a is a perspective view of the PC wall plate installed in the retaining wall structure of the present invention,

6B is a front view of the PC wall board installed in the retaining wall structure of the present invention;

Figure 6c is a cross-sectional plan view of the PC wall plate installed in the retaining wall structure of the present invention,

Figure 7a is a cross-sectional view showing a state assembled between the PC wall board according to the present invention,

Figure 7b is a view showing the bending moment acting on the PC wall plate according to the present invention,

8a to 8e is a cross-sectional view showing a step-by-step construction process of a shelf retaining wall using a PC wall plate according to the present invention.

Description of the Related Art

10: foundation 11: foundation concrete plate

12: seating groove 20: wall portion

20A: Lower PC wall board 20B: Upper PC wall board

21: Plate 22a, 23a: (left and right, up and down) protruding jaw

22b, 23b: (left, right, up and down) fitting groove 24a, 24b: (left, right) support wall

25a, 25b: lateral protrusion 26: column

27a, 27b: Lateral haunting part 28: Double hole

29a: drainage through hole 29b: drainage guide groove

30: shelf A: foundation rebar assembly

B: Vertical rebar assembly for wall connection C: Horizontal rebar assembly for shelves

F1: Foundation Formwork F2: Shelving Formwork

Claims (7)

Foundation formed in the base concrete plate 11 and the base concrete plate embedded in the bottom ground along the longitudinal direction of the lower end of the installation position is formed so that the vertical reinforcing bar assembly (B) for wall connection to the upper side at regular intervals is long exposed The unit 10, the wall portion 20 is installed on the upper surface of the base portion is vertically connected and assembled to the left and right, the wall portion 20 is integrally connected to the vertical reinforcing bar assembly (B) for wall connection at a predetermined position of the wall portion In the shelf retaining wall structure in which the shelf part 30 formed by pouring concrete into the horizontal rebar assembly C for shelves is embedded in sloped ground, The wall portion 20 is formed with a projection jaw 22 and a fitting groove 23 on the left and right edges, respectively, and the front surface is flat, and the plate 21 is positioned near each of the left and right ends of the rear surface of the plate 21, respectively. Columns between the connection with the left and right adjacent PC wall plates while assembling and connecting the concrete PC wall plates 20A and 20B which form the support walls 24a and 24b and the side protrusions 25a and 25b symmetrically up and down. Formed to form a 26 to be integrally connected with the base portion 10, The shelf portion 30 is one side of the PC is installed so that the concrete is poured into the column 26 formed between the connection between the PC wall plate (20A, 20B) and integrally connected to the wall portion 20 Shelf retaining wall structure using wall plate. The vertical reinforcing bar assembly of claim 1, wherein the column 26 formed between the connection parts with the left and right adjacent PC wall plates 20A and 20B protrudes tubularly into the slope ground and is exposed upward from the base part 10. B) A shelf retaining wall structure using a PC wall plate, characterized in that the base portion 10 and the wall portion 20 are molded into an integral structure by accommodating concrete in the inner space of the column 26. The wall portion 20 is composed of a lower PC wall plate 20A and an upper PC wall plate 20B so that the upper PC wall plate 20B is mounted on the lower PC wall plate 20A by upper and lower projection jaws and fitting grooves. The upper ends of the supporting walls 24a and 24b and the side protrusions 25a and 25b of the PC wall plates respectively located near both ends of the rear surface of the plate body 21 are lowered from the upper end of the plate body 21 by a predetermined distance. The horizontal reinforcing bar assembly (C) of the shelf part 30 is connected to the vertical reinforcing bar assembly (B) for wall connection extending upward from the base portion 10 between the upper and lower PC wall plates to pour concrete. Shelf-type retaining wall structure using a PC wall plate, characterized in that the wall portion 20 and the shelf portion 30 was formed in an integral structure. The side wall portion 27a formed between the plate body 21 and the pair of support walls 24a and 24b integrally formed on both sides of the inner surface of the plate body 21 in the PC wall plates 20A and 20B. Shelf retaining wall structure using a PC wall plate, characterized in that formed in the upper and lower positions of the (27b) a plurality of double holes (28) penetrating the side haunch (27a, 27b) on both sides, respectively. The drainage hole 29a which penetrates the plate body 21 back and forth is formed in the PC wall plate 20A, 20B in the middle lower position of the plate body 21, and the drainage hole 29a Shelf retaining wall structure using a PC wall plate, characterized in that the vertical drain guide groove (29b) formed on the surface of the lower plate 21. After digging and compacting along the lower end of the slope, install the discarded concrete and install the foundation formwork (F1) on the upper side to reinforce the basic reinforcing bar assembly (A) inside the back of the reinforcing bar assembly (A) The reinforcing bar assemblies (A) for wall connection are vertically connected and vertically connected to each other, and the concrete is poured so that the foundation reinforcing bar assembly (A) is buried and the wall reinforcing bars (B) are exposed upward. An installation step of the foundation portion 10 in which the foundation concrete plate 11 is embedded in the bottom ground; The lower PC wall plate 20A manufactured in the field is transported so that the lower part of the plate body 21 of the lower PC wall plate 20A is seated in the fitting groove 12 formed on the upper surface of the base concrete plate 11. By assembling the plate body 21 of the PC wall plate 20A to each other by chin fit, a pair of support walls 24a, 24b and side projections 25a which are formed symmetrically on both sides of the inner surface of the plate body 21. After assembling the vertically reinforcing bar assembly (B) for wall connection embedded in the base concrete plate (11) and extending upward in the column (26) protruding in a tubular shape by the combination of (25b), the column ( A step of installing the wall part 20 in which concrete is poured into the inner space of the 26 to integrally connect the left and right adjacent lower PC wall plates 20A; Backfill the soil to the outer upper end of the column 26 formed by the assembly of the lower PC wall plate 20A, and then install the discarded concrete, install the formwork for the shelf (F2) and then install the vertical reinforcing bar assembly for wall connection (B) The horizontal reinforcing bar assemblies (C) for the integrated connection from the shelves, and the installation step of the shelf part 30 formed by pouring concrete so that the horizontal reinforcing bar assemblies (C) for the shelves are embedded; A construction method of a shelf retaining wall using a PC wall plate characterized in that. The lower PC wall board 20B of the upper PC wall board 20B is transported by carrying the upper PC wall boards 20B to the upper side of the lower PC wall board 20A after the shelf installation step. Standing on the shelf part 30 so as to fit the upper end of the plate 21, the plate 21 is assembled between the left and right adjacent upper PC wall plate 20B by chin fitting, but both support walls on the inner side of the plate 21 After assembling the column 26 protruding tubularly by the combination of the 24a, 24b and the lateral protrusions 25a, 25b to coincide with the column 26 formed by the lower PC wall plate 20A, The installation method of the shelf type retaining wall using a PC wall plate further comprises the step of installing the upper PC wall plate (20B) to form the concrete in the column 26 to extend the wall portion 20 upward.

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