KR101159097B1 - Precast abutment for longitudinal continuous connection and construction method therefor - Google Patents

Abstract

PURPOSE: A precast abutment for enabling longitudinal sequence and a construction method thereof are provided to enable structurally-efficient and cost-efficient construction by integrally and longitudinally sequencing precast abutments previously manufactured. CONSTITUTION: A precast abutment for enabling longitudinal sequence comprises rear wall parts(210), front wall parts(220), inner decks(400), and continuous concrete(300). Upper hanging support blocks are longitudinally formed on the inner surfaces of the rear and front wall parts. The front wall parts are horizontally separated from the rear wall parts. Both ends of the inner decks are supported to the upper hanging support blocks of the rear and front wall parts. The continuous concrete is placed between the tops of the rear and front wall parts.

Description

PRECAST ABUTMENT FOR LONGITUDINAL CONTINUOUS CONNECTION AND CONSTRUCTION METHOD THEREFOR}

The present invention relates to a precast shift that can be continuous in the longitudinal direction and a construction method thereof. More specifically, a precast shift and a construction method of installing a plurality of rear wall parts and a front wall part in the longitudinal direction and constructing a vertically continuous shift by integrating the rear wall part and the front wall part through alternating upper concrete with each other It is about.

In order to construct a shift in general, ground excavation for the construction of the shift, the foundation pile is installed on the upper surface of the excavated ground, the shift structure is installed, and the construction is performed in such a manner as to fill the back space of the shift structure.

At this time, the shift structure 10 is generally constructed as a shift structure made of concrete as shown in Figure 1a.

Accordingly, the shift structure is designed, manufactured and constructed to resist such earth pressure because it receives earth pressure (horizontal direction) by backfilled earth and the like.

Therefore, the shift structure 10 is to excavate a considerable amount of the site in which the shift structure is constructed in consideration of the space to be constructed. In other words, it is common to secure the space in which the shift structure should be installed in advance, and install the formwork and then use the site-casting concrete.

In order to solve this problem, a lot of effort and time are needed to construct the shift structure through the trench in the fill section, the cut section, and both sides of the road in the complex.

When the height of the shift structure is increased, the cross-sectional size of the shift structure must be large because the earth pressure acting is large, and there is a problem that the installation of the precast shift structure has many problems to be solved in terms of constructability and economic efficiency.

Looking at the rapid construction method of the alternate structure introduced in order to solve this problem as shown in Figure 1b and 1c,

Install the foundation foundation 20 for the excavated ground, but installed so that the upper portion extends above the ground, and install the lower shift structure 11 is integrated with the foundation pile and backfill the destroyed space Installed so that the upper portion of the foundation pile 20 protrudes to the upper portion of the lower shift structure,

The upper pile 10 and the connecting pile 30 is coupled to the upper portion of the projected foundation pile is installed to protrude on the bottom, and the space between the upper portion of the foundation pile and the connection pile closed with a finishing material containing concrete A rapid construction method for shift structures has been introduced.

In this case, the lower shift structure 11 is constructed as a retaining wall structure, and the upper shift structure 12 is a block structure in which the connection pile 30 protrudes from the bottom, and is precast upper shift integrated with the connection pile 30. The structure 12 will be used.

This can be designed to have an effective cross-sectional size of the shift structure, it can be seen that the more economical shift structure construction, the faster the construction of the shift structure is possible.

However, even if the upper shift structure is manufactured by the precast method, there is a limitation in that it can be installed only in a limited range due to the limitation in manufacturing and transportation due to the weight.

In addition, in the case of the conventional precast shift structure (precast upper shift structure 12) when connecting the plurality in the longitudinal direction to each other, the sequencing problem is pointed out. If this continuity problem is not solved, each precast shift structure connection defect There was a problem that it may not be easy to cope with the occurrence of inequality.

Therefore, the present invention is to install the precast shift manufactured on the factory site by minimizing the self-weight, it can be continuous to each other in the longitudinal direction so that it can be integrated integrally precast shift and construction that can be more structurally efficient and economical Providing the construction method is the technical problem to be solved.

In order to achieve the above technical problem

In order to reduce the weight of the first shift, a precast wall is formed for alternating hollows, and after the precast wall is installed in the field, alternating sequential concrete is installed on the upper part of the precast wall spaced apart from each other in the lateral direction. It is formed continuously to integrate the precast wall in the longitudinal direction and to make it continuous.

Second, an inner deck is installed to connect the precast walls spaced apart from each other in the lateral direction. The inner deck is placed on top of the inner deck to integrate the precast walls spaced apart from each other in the lateral direction. The thickness of the precast wall can be minimized by effectively resisting the earth pressure acting on the back of the precast wall.

To this end,

A rear wall portion having an upper locking support block formed on an inner side thereof;

A front wall portion having an upper locking support block formed on an inner side at a position corresponding to the upper locking support block of the rear wall portion to be spaced apart from the rear wall portion in a lateral direction;

An inner deck installed at both ends of the engaging support blocks;

Alternate sequential concrete formed between the rear wall portion and the upper wall portion as being poured and cured on the inner deck; The rear wall portion, the front wall portion and the inner deck are factory manufactured and installed in the field. Alternating sequential concrete provides precast shifts and construction methods that can be sequential in the longitudinal direction, which is directly constructed with cast-in-place concrete.

In addition, the rear wall portion formed in the longitudinal direction; A front wall part which is installed in a longitudinal direction at a position corresponding to an upper surface of the rear wall part and spaced apart from the rear wall part; An inner deck installed at both ends of the rear wall and the front wall to support both ends thereof; And

Alternate sequential concrete formed on the rear wall portion, the front wall and the inner deck; The rear wall portion, the front wall and the inner deck is factory-manufactured and installed in the field, the alternate sequential concrete is cast in place Provides a precast shift and its construction method that can be continuous in the longitudinal direction of the site.

The alternating precast walls which can be transported by the present invention are integrated with each other to be continuous in the longitudinal direction, thereby enabling alternating construction having structural continuity.

In addition, even if the shift increases in height, it is possible to effectively resist the earth pressure acting on the shift by the internal deck, thereby ensuring the structural stability of the shift due to the increase of the shift.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1A is a perspective view of a conventional shift,
Figure 1b and Figure 1c is a perspective view of the construction of the conventional precast shift and the excerpt of the precast upper shift structure,
2A and 2B are construction views and front views of a precast shift capable of sequencing of the present invention;
3a, 3b and 3c is a flow chart of a precast shift construction method capable of sequencing of the present invention,
4a and 4b is a connection detail view of the precast wall and the bottom plate,
Fig. 5 is another constructional perspective view of the precast shift in which the present invention can be serialized.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

[Precast Shift (A)]

2A and 2B are construction views and front views of a precast shift capable of being continuous in the longitudinal direction of the present invention.

The longitudinally continuous precast shift includes a bottom plate 100, a precast wall 200, alternate continuous concrete 300, and an inner deck 400.

The bottom plate 100 is formed as a base plate for the construction of the shift, such a bottom plate is to be formed of site-cast concrete with a predetermined thickness in the field.

Since the bottom plate 100 is a member which is constructed in the form of a horizontal plate, it is easy to continuously install in the longitudinal direction, so that the bottom plate 100 is formed of site-poured concrete using formwork in the field rather than precast construction.

The bottom plate 100 is a structure for supporting the precast wall 200, which will be described later, and may be constructed after breaking the ground of the site.

Furthermore, even if the base plate 100 is not installed, if the precast wall 200 can be constructed, the bottom plate 100 may be omitted, and thus, the base plate concrete may be interpreted as a meaning including the supporting concrete.

The precast wall 200 is divided into a rear wall part 210 and a front wall part 220 as a wall constituting an alternating front part and a rear part.

First, the rear wall part 210 is used to form an alternating rear part, and a precast product manufactured in the form of a vertical wall is used.

The one manufactured integrally according to the alternating installation height H1 is used and is a reinforced concrete vertical wall having a predetermined transverse width W1 and W2 and a longitudinal width W4.

The rear wall portion 210 is pre-manufactured in the factory is brought into the field and installed vertically, so that the engaging block is formed on the inner surface to install the inner deck 400,

The locking block is formed of a block extending in the longitudinal direction. At least one of these latching blocks is installed at least up and down, and it can be seen that they are divided into upper locking blocks 212 and lower locking blocks 211, respectively.

The rear wall portion 210 may be formed such that the lower transverse width W1 is thinner than the upper transverse width W2, which effectively reduces the weight of the rear wall 210 and acts on the load. This is to form a cross section that can resist.

In addition, the lateral width of the rear wall portion is changed, the lower boundary portion (C) is tapered to form an alternate sequential concrete 300 to be described later.

The front wall portion 220 is to form an alternating front portion, and a precast product is also used in the form of a vertical wall.

It is a reinforced concrete vertical wall having the same longitudinal width W3 and the same longitudinal extension as the rear wall, depending on the alternating installation height.

However, the height H2 of the front wall portion 220 is to be formed to be smaller than the height (H1) of the rear wall portion 210.

The front wall part 220 is also pre-manufactured at the factory and is carried in the field, and is laterally spaced apart from the rear wall part 210 and installed vertically on the bottom plate 100.

In order to install the inner deck 400, the inner surface is formed so that the protruding engaging block is formed up and down, and the engaging block is formed as a block extending in the longitudinal direction, but the engaging block is on the rear wall portion (210) At least one of the upper and lower locking blocks 212 and 211 may be installed at least up and down on the inner surface.

In addition, it can be seen that the locking block of the front wall part 220 is also divided into an upper locking block 222 and a lower locking block 221, respectively.

Accordingly, the internal hollows S may be naturally formed as shown in FIG. 2B by the lateral separation of the rear wall part 210 and the front wall part 220, and each of the engaging blocks 211, 221, 212 and 222 has an internal deck. Both ends of the 400 are installed to be supported.

In addition, the front wall 220 may be formed with a hollow hole 223 to reduce its own weight.

The inner deck 400 is installed in the inner hollow (S) as a lower plate for forming the alternating sequential concrete 300 to be described later and serves to structurally integrate the rear wall portion 210 and the front wall portion 220 with each other It will play the role of.

First, since the rear wall portion 210 and the front wall portion 220 are spaced apart from each other in the lateral direction and are not connected to each other, the rear wall portion 210 and the front wall portion 220 must be connected to each other.

To this end, a normal horizontal plate is installed between the rear wall portion 210 and the front wall portion 220, and both ends of the horizontal plate are connected to the rear wall portion 210 and the front wall portion 220 to connect the rear wall portion. 210 and the front wall portion 220 may be connected to each other, but the integration performance is reduced.

Accordingly, the present invention uses the inner deck 400, as shown in Figure 2a and 2b in particular, such an inner deck 400 is a shear plate 420 formed on the upper surface of the lower plate 410 and the concrete lower plate 410 of the horizontal plate form , Retis reinforcing bar) is used to be formed integrally.

The lower plate 410 may be made of steel and may be made of concrete in consideration of economical aspects.

The lower plate 410 has a transverse width determined so that both ends are supported by the upper engaging blocks 211 and 221 of the rear wall portion 210 and the front wall portion 220 described above, and the rear wall portion 210 in the longitudinal direction. What is formed in accordance with the longitudinal width W4 of the front wall part 220 is used.

The shear reinforcing bar 420 (reticle reinforcing bar) is integrated with the lower plate and exposed upward. The inner reinforcement deck 420 is embedded in the upper portion of the inner wall 400 so that the shear reinforcing bar 420 is embedded.

Accordingly, when the inner deck concrete 430 is cured after being placed so that the shear reinforcement 420 is embedded, the lower plate 410, the rear wall portion 210, and the front wall portion 220 are integrated with each other by the shear reinforcement 420. Structurally integrated.

Therefore, the rear wall portion 210 and the front wall portion 220 is not only structurally integrated with each other by the inner deck 400, the important point is

The load supporting point P for the earth pressure V acting on the rear surface of the rear wall part 210 is further formed by the lower locking blocks 211 and 221 and the inner deck 400 as shown in FIG. 2B.

That is, the height H1 of the rear wall portion 210 varies depending on the alternation, but is approximately 10M, and the back earth pressure acting on this height becomes very large, in particular, the lateral widths W1 and W2 of the rear wall portion 210. ) Must have a width corresponding to the earth pressure.

However, in order to manufacture the rear wall portion 210 corresponding to the width, as the transverse width increases, the weight thereof can not but be increased, so there is a limit in manufacturing the rear wall portion 210 by precast.

Accordingly, when the load supporting point P is formed at the middle point of the height in consideration of the fact that the rear earth pressure increases with the height of the rear wall portion 210, the rear wall portion 210 is formed on the basis of the load supporting point P. Height is divided into (H11, H12, H13) it can be seen that the bending moment acting on the front wall portion 220 acts in a smaller size up and down.

Therefore, the transverse width W1 of the rear wall portion can be formed corresponding to the small earth pressure up and down, thereby minimizing its weight.

Accordingly, the load supporting points P may be formed by the lower locking blocks 211 and 221 and the inner deck 400 so that the transverse width according to the height H of the front wall part 220 may not be greatly increased. It can be seen that.

The alternating sequential concrete 300 is for forming the alternating upper portion in the longitudinally continuous structure.

That is, alternating sequential concrete 300 is formed on the upper locking blocks 212 and 222 of the precast wall 200.

The upper part of the shift is classified according to whether the shift is for railway or bridge, for example. However, whatever the use, the alternating upper surface is the part where the traffic load repeats, such as the support.

As a result, the fatigue load becomes very large due to the repetitive load, which may cause a problem in the longitudinal connection when the shift is segmented.

Even if the longitudinal connection does not cause problems, maintenance of the connection is not easy in the future.

In the present invention, the alternating upper portion is formed as a continuous structure in the longitudinal direction, which is to form the alternating upper portion integrally with concrete in the field.

However, since the rear wall portion 210 and the front wall portion 220 are laterally spaced apart from each other in the shift of the present invention, the rear wall portion 210 and the front wall portion 220 have the inner deck 400 described above on the upper side. Both ends are supported on the upper locking blocks 212 and 222.

Of course, it can be seen that the inner deck 400 acts as a lower plate for placing alternating sequential concrete 300. Of course, as described above, the rear wall part 210 and the front wall part 220 serve to integrate with each other, and also serve as a load supporting point P.

In addition, the inner deck 400 may use a lower plate 410 having a horizontal plate shape and a shear reinforcing bar 420 formed on the upper surface of the concrete lower plate 410 are integrally formed.

When the inner deck 400 is installed, the concrete for alternate continuous concrete 300 is poured. Such alternate continuous concrete 300 is positioned at the boundary between the upper and lower front wall parts 222 and 123 and the upper surface is outside. To be exposed.

The placing height of the alternate continuous concrete 300 is to have a sufficient up and down thickness corresponding to the repetitive load, the alternate continuous concrete 300 is the rear wall portion 210 and the front wall portion 220 in the longitudinal direction All of them are formed integrally with each other so that the upper part of the shift is integrated with each other.

As a result, the precast wall 200 of the present invention has internal hollows S formed therein, so that the weight of the rear wall 210 and the front wall 220 can be structurally integrated with each other, and the front wall portion ( It can be seen that it is possible to effectively resist the earth pressure acting on the 220), which enables highly efficient precast shift construction.

[Construction method of precast shift (A) that can be serialized]

3A to 3C sequentially illustrate a method of constructing a precast shift A that can be serialized according to the present invention.

First, as shown in FIG. 3a, the shift is to be broken and finished the ground of the site and to form the bottom plate 100.

The bottom plate 100 may be formed in the form of a horizontal plate having a predetermined thickness by using the formwork, and the reinforced concrete bottom plate is constructed in the field.

The bottom plate 100 may be hardened to each other so that the lower portion of the rear wall portion 210 and the front wall portion 220 may be connected to each other, or may be hinged (not shown).

First, FIGS. 4A and 4B show an example in which the bottom plate 100, the rear wall portion 210, and the front wall portion 220, that is, the precast wall 200 are firmly bonded to each other.

First, referring to FIG. 4A, the inner reinforcement 230 of the precast wall 200 extends downward to be embedded to be embedded when the bottom plate 100 is constructed.

In this case, when the precast wall 200 having the internal reinforcement extending downward is set, the internal reinforcing steel for the bottom plate is reinforced, and the concrete for the bottom plate 110 is formed to have a predetermined thickness. The bottom plate 100 may be integrated with each other and hardened.

Figure 4b is an example of using the sleeve to the precast wall 200 to the internal reinforcement 120 of the bottom plate 100 made of cast-in-place concrete.

That is, the internal reinforcing bar 230 is set in advance (approximately about half) inside the sleeve 240 formed in the bottom of the precast wall 200,

After the inner reinforcement 120 of the bottom plate 100 is also inserted into the sleeve 240 from the bottom, due to the grouting material inside the sleeve

The inner reinforcement 120 of the bottom plate may be rigidized by being integrated with the precast wall 200 by the sleeve 240.

Accordingly, the rear wall portion 210 which is manufactured at the factory and brought into the site is first installed on the outer upper surface of the bottom plate 100.

The rear wall portion 210 is in contact with each other in the longitudinal direction and the connecting portion is installed so as to be able to stand on the bottom plate in the longitudinal connection such as grouting.

Next, the front wall 220 is installed on the inner upper surface of the bottom plate 100 so as to be spaced apart from the rear wall 210 in the lateral direction.

Of course, the front wall portion 220 is also manufactured at the factory to install the rear wall portion 210 brought into the site first.

On the inner side of the front and rear wall portion (110, 120) it can be seen that the engaging support blocks 211, 212, 221, 222 are formed in the middle and top, respectively, so that the inner deck 400 can be installed up and down.

Next, as shown in Figure 3b is installed so that the inner deck 400 is supported on the lower engaging support blocks (211,221) formed in the front and rear wall parts (110,120).

First, the lower inner deck 400 is installed to be in contact with each other in the longitudinal direction, then the inner deck concrete 430 is poured and cured, and the upper inner deck 400 is also installed to be in contact with each other in the longitudinal direction.

First, as shown in FIG. 3c, the interior deck concrete 430 is poured onto the lower locking support blocks 211 and 221 and the inner deck concrete 430 is cured to integrate the front and rear wall parts 110 and 120.

Next, the concrete for alternating continuous concrete 300 is placed and cured on the inner deck 400 installed on the upper locking support blocks 212 and 222 to integrally install the alternating continuous concrete 300 longitudinally.

As a result, it can be seen that it is possible to construct a shift A that is simply structurally integrated with each other in a precast manner.

[Other Embodiments of Precast Shift Enabled for Continuous]

FIG. 5 is particularly similar to the precast alternating of FIGS. 2A and 2B but shows other forms of the inner deck 400 and the front wall portion 220.

That is, it can be seen that the rear wall portion 210 is formed of a vertical wall formed with a lower locking block 211,

It can be seen that the front wall portion 220 is formed of a vertical wall having a lower locking block 221 corresponding to the lower locking block 211.

In this case, the front wall part 220 may be manufactured by installing the upper and lower front wall parts 220a and 220b in consideration of size and the like.

For example, the lower front wall portion 220b having the vertical pillar portion formed on the upper surface thereof is connected and installed in the longitudinal direction,

The upper front wall portion 220a of the cross section may be set to be placed on the upper surface of the lower front wall portion 220b as a whole.

At this time, a bottom (not shown) may be further installed so that the upper front wall portion 220a of the cross section is not conductive.

In addition, an inner deck 400 may be installed between the rear wall portion 210 and the upper surface of the front wall portion 200 or the upper front wall portion 200b.

The inner deck 400 may use the lower plate 410 and the shear connector 420 as described above, but may be formed in the form of a horizontal plate, and in Figure 5 the inner deck 400 is bent at both ends downward It can be seen that the horizontal plate is used.

It can also be seen that the inner deck 400 made by using the lower plate 410 and the shear connector 420 between the rear wall and the lower engaging support blocks 211 and 221 of the front wall.

Furthermore, the alternate continuous concrete 300 is formed on the upper wall portion 210, the front wall portion 220 and the inner deck 400 of the horizontal plate form, or

The rear wall portion 210, the upper front wall portion (220a) and can be formed on the upper portion of the inner deck 400 in the form of a horizontal plate.

In addition, it can be seen that the upper and lower front wall portions 220a and 220b may be further integrated with each other by using alternate continuous sequential concrete 300.

100: bottom plate
200: precast wall
210: back wall part
211: lower locking support block
212: upper locking support block
220: front wall
221: lower locking support block
222: upper locking support block
300: alternate sequential concrete
400: internal deck
410: bottom plate
420: shear rebar
430: internal deck concrete

Claims (14)

A rear wall portion 210 in which an upper locking support block 212 is formed in a longitudinal direction on an inner side thereof;
The front wall is formed to be spaced apart from the rear wall portion 210 in the transverse direction, the upper locking support block 222 in the position corresponding to the upper locking support block 212 of the rear wall portion 210 in the longitudinal direction on the inner surface Wall portion 220;
An inner deck 400 installed at both ends of the engaging support blocks 212 and 222 to support the ends; And
Including; alternating sequential concrete 300 formed between the rear wall portion 210 and the front wall portion 220 of the upper portion of the inner deck 400;
The rear wall portion 210, the front wall portion 220 and the inner deck 400 is factory-manufactured and installed in the field, the alternating continuous concrete 300 is characterized in that the construction of the site directly in the cast concrete Precast shift that can be continuous in any direction. The method of claim 1,
The lower locking support block 211 is further formed in the longitudinal direction below the upper locking support block 212 of the rear wall portion 210, and the upper locking support block 221 of the front wall portion 220. The lower locking support block 221 is further formed in the longitudinal direction on the inner side corresponding to the position of the lower locking support block 211 in the rear wall,
An inner deck 400 is further installed on the lower locking support blocks 211 and 221 so that the inner deck concrete 430 may be further formed on the inner deck 400. rotation. 3. The method according to claim 1 or 2,
The inner deck 400, the lower plate 410 and the precast shift that can be continuous in the longitudinal direction, characterized in that the shear reinforcing bar (420, retis reinforcement) formed on the upper surface of the concrete lower plate (410) is formed integrally. A rear wall portion 210 formed in the longitudinal direction;
A front wall part 220 installed in a longitudinal direction at a position corresponding to an upper surface of the rear wall part 210 to be spaced apart from the rear wall part 210 in a lateral direction;
An inner deck 400 installed at both ends of the rear wall part 210 and the front wall part 220 so as to support both ends thereof; And
Including; alternating sequential concrete 300 formed on the rear wall portion 210, the front wall portion 220 and the inner deck 400,
The rear wall portion 210, the front wall portion 220 and the inner deck 400 is factory-manufactured and installed in the field, the alternating continuous concrete 300 is characterized in that the construction of the site directly in the cast concrete Precast shift that can be continuous in any direction. The method of claim 4, wherein
The front wall portion 220 is installed above the lower front wall portion 220a and the lower front wall portion 220a, the upper surface of which is disposed below the upper surface of the rear wall portion 210 of the rear wall portion 210. Continuously arranged in the longitudinal direction characterized in that it further comprises an alternate sequential concrete (300) formed in the upper front wall portion 220b having an upper surface positioned at a position corresponding to the upper surface; Angry precast shift. 6. The method of claim 5,
The lower locking support block 211 is further formed in the longitudinal direction below the upper locking support block 212 of the rear wall portion 210, and the front wall portion 220 or the lower front wall portion 220a. The lower locking support block 221 is further formed in the longitudinal direction on the inner side corresponding to the position of the lower locking support block 211 in the rear wall,
An inner deck 400 is further installed on the lower locking support blocks 211 and 221 so that the inner deck concrete 430 may be further formed on the inner deck 400. rotation. The method according to claim 6,
The inner deck 400, the lower plate 410 and the precast shift that can be continuous in the longitudinal direction, characterized in that the shear reinforcing bar (420, retis reinforcement) formed on the upper surface of the concrete lower plate (410) is formed integrally. Installing a precast rear wall portion 210 on the bottom plate 100 having an upper locking support block 212 formed in a longitudinal direction on an inner side thereof;
On the bottom plate 100, the upper locking support block 222 is formed at a position corresponding to the upper locking support block 212 of the rear wall portion 210, and the rear surface of the precast front wall portion 220 formed in the longitudinal direction on the rear surface. Spaced apart from the wall portion 210 in the transverse direction;
Installing a precast inner deck 400 to support both ends of the engaging support blocks 212 and 222;
Forming alternately continuous concrete 300 in the field between the back wall portion 210 and the front wall portion 220 of the upper portion of the inner deck 400; longitudinal continuity possible Precast shift construction method. The method of claim 8,
Further forming a lower locking support block 211 in the longitudinal direction on the inner side below the upper locking support block 212 of the rear wall portion 210,
By further forming a lower locking support block 221 on the inner side in the longitudinal direction below the upper locking support block 221 of the rear wall portion 220,
An inner deck 400 is further installed on the upper locking support block 212 and the lower locking support block 221 so that the inner deck concrete 430 is further formed on the inner deck 400. Precast shift construction method that can be continuous in the direction. The method according to claim 8 or 9,
The inner deck 400, the lower plate 410 and the precast shift construction method that can be continuous in the longitudinal direction, characterized in that the shear reinforcement (420, retis reinforcement) formed on the upper surface of the concrete lower plate (410) is formed integrally. Installing a rear wall portion 210 formed in a longitudinal direction;
Installing a front wall part 220 formed in a longitudinal direction at a position corresponding to an upper surface of the rear wall part 210 in a lateral direction from the rear wall part 210;
Installing an inner deck (400) such that both ends are supported on upper surfaces of the rear wall portion (210) and the front wall portion (220); And
Alternate continuous longitudinal precast construction, comprising the step of installing; alternate sequential concrete 300 on the rear wall portion 210, the front wall portion 220 and the inner deck 400; Way. 12. The method of claim 11,
The front wall portion 220 is installed above the lower front wall portion 220a and the lower front wall portion 220a, the upper surface of which is disposed below the upper surface of the rear wall portion 210 of the rear wall portion 210. It is divided into an upper front wall portion 220b having an upper surface positioned at a position corresponding to the upper surface and alternate sequential concrete 300 formed on the lower and upper front wall portions; Precast shift construction method that can be serialized. 13. The method of claim 12,
Further forming a lower locking support block 211 in the longitudinal direction on the inner side below the upper locking support block 212 of the rear wall portion 210,
By further forming a lower locking support block 221 on the inner side in the longitudinal direction below the upper locking support block 221 of the rear wall portion 220,
An inner deck 400 is further installed on the upper locking support block 212 and the lower locking support block 221 so that the inner deck concrete 430 is further formed on the inner deck 400. Precast shift construction method that can be continuous in the direction. The method according to claim 12 or 13,
The inner deck 400, the lower plate 410 and the precast shift construction method that can be continuous in the longitudinal direction, characterized in that the shear reinforcement (420, retis reinforcement) formed on the upper surface of the concrete lower plate (410) is formed integrally.

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