KR101584070B1

KR101584070B1 - Loop steel bottom mounted precast bridge deck module

Info

Publication number: KR101584070B1
Application number: KR1020150065154A
Authority: KR
Inventors: 김영진; 김인규; 박세진; 신동호; 진병무; 오현철; 마향욱; 조준희
Original assignee: (주)대우건설
Priority date: 2015-05-11
Filing date: 2015-05-11
Publication date: 2016-01-11

Abstract

The present invention relates to a precast concrete bottom plate, and more specifically, to a precast concrete bottom plate mounted in a lower end of a loop rebar. The precast concrete bottom plate mounted in a lower end of a loop rebar forms uneven portions in a partition wall shape protruding on both sides of the precast concrete bottom plate at equal intervals to form pockets between the uneven portions, and forms a loop rebar horizontally protruding from the inside of each pocket to allow the loop rebar to intersect with a loop rebar formed on a neighboring precast concrete bottom plate to deposit a binding material between the uneven portions and in the pockets to improve resistance performance between the uneven portions.

Description

{LOOP STEEL BOTTOM MOUNTED PRECAST BRIDGE DECK MODULE}

The present invention relates to a precast concrete bottom plate. More particularly, the present invention relates to a precast concrete bottom plate. More particularly, the present invention relates to a precast concrete bottom plate, And the lower end of the loop reinforcement is embedded in the bottom of the pocket to form a structure that is safe and structurally safe, and a coupling material is placed between the concave and the convex portions and the pocket, The present invention relates to a pre-cast concrete bottom deck having a reinforced concrete structure.

A technique for constructing a pre-cast concrete bottom plate by dividing it into a plurality of pre-cast concrete bottom plate modules and then assembling the pre-cast concrete bottom plate module in the field is known.

In the assembly of the precast concrete bottom plate module in this way, it is known that a seamless connection is made between the precast concrete bottom plate modules by installing a loop reinforcement on one side of the precast concrete bottom plate module.

As an example of a precast concrete structure manufactured by assembly connection of the precast concrete bottom plate module, a bottom plate is disclosed in Korean Patent No. 10-0775580 and 10-1327982.

In the above-mentioned No. 10-0775580, a concave portion is formed in the joint portion of the bottom plate to unite the bottom plate in the field, and a loop reinforcement is projected to the concave portion so that the loop reinforcing bars of the adjacent bottom plates overlap each other at the concave portion. Then, the concave portion was filled with filler such as non-shrinkage concrete so that the looped reinforced reinforcing bars were embedded in the filling material so that the adjacent bottom plates were integrated with each other.

10-1327982 discloses a precast concrete bottom plate module in which a concave portion and a convex portion are sequentially formed in a transverse direction in a joint portion of the precast concrete bottom plate module, the loop reinforcement protrudes in the convex portion, and a through hole is formed, The respective concave portions formed in the concrete bottom plate module are displaced from each other in position; The concave portion formed on one side of the precast concrete bottom plate module faces the convex portion of the neighboring other precast concrete bottom plate module, and in a state where the loop reinforcement is positioned in the concave portion of the adjacent other precast concrete bottom plate module, A connecting rod is inserted through the through hole formed in the convex portion of the precast concrete bottom plate module so that the connecting rod is located inside the loop of the loop reinforcement; The concave portion is filled with the filler and hardened so that the two precast concrete bottom plate modules are integrally connected to each other so that the force from one precast concrete bottom plate module is transmitted to the other precast concrete bottom plate module through the loop reinforcement and connecting rod do.

However, in the above-mentioned No. 10-0775580, a loop reinforcement installed on a neighboring bottom plate is buried in a filler material. Since the joint length of a connection portion becomes long and the filler must be used as concrete, have.

In addition, the above-mentioned 10-1327982 is arranged such that the connecting rod is inserted through the connecting rod so that the connecting rod is located inside the loop of the loop of the loop. Likewise, since the connecting length of the connecting portion becomes long and the filling material must be used as concrete, .

Domestic patent registration 10-0775580 Domestic Patent Registration No. 10-1327982

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems described above, and it is an object of the present invention to provide a pneumatic tire which is characterized in that ribbed protrusions and protrusions are protruded at equal intervals on both sides thereof to form pockets between the protrusions and the pockets, It is structurally safe that the lower end of the loop reinforcement on one side is embedded in the bottom of the pocket, so that it is installed separately in the irregularities and in the pockets. The present invention has been made to solve the above problems and to provide a pre-cast concrete deck having a roof reinforced concrete structure capable of rapid construction without a formwork of the roof reinforcing bars and improving the resistance performance between the concave and the convex.

Further, since the loop reinforcing bars are located between the concave and the convex portions, a space capable of accommodating the reinforcing steel rods is ensured, and the bending resistance can be ensured by the cast iron rods. In addition, since the cast iron rope is embedded at the bottom of the pocket, The present invention has another object to provide a bottom reinforced concrete precast concrete floor slab.

In addition, the present invention provides a pre-cast concrete bottom deck having a roof reinforced concrete bottom which can be vertically mounted by interference with neighboring precast concrete decks when the bottom deck is mounted, thereby improving workability. There is a purpose.

According to an aspect of the present invention,

A precast concrete deck comprising: a plurality of first pockets spaced apart from one another at regular intervals to form first concavities and convexities; A first precast concrete bottom plate protruding horizontally from the inner side of the pocket to the first loop reinforcement; And second pockets having a front surface opened at equal intervals so as to be symmetrical with respect to the first precast concrete bottom plate so as to form second irregularities so that the second irregularities are formed on one side of the second pockets, The first loop reinforcing bars and the second loop reinforcing bars overlap each other while being horizontally protruded from the first loop reinforcing bars and mutually intersecting with the first loop reinforcing bars and spaced apart from the first precast concrete deck by a predetermined distance, And a second precast concrete bottom plate for casting a cast iron into the first and second concave-convex portions and the first and second pockets after casting the cast iron rope on the upper portion of the portion.

Wherein a length of a first pocket of the first precast concrete deck is formed to be less than a length of a second pocket of the second precast concrete deck, The loop reinforcement is protruded outward and inserted into the second pocket.

Here, the second precast concrete deck is further provided with a plurality of reinforcing steel rods in the lateral direction at the lower portion of the second pocket.

Here, the second precast concrete deck is embedded in the step formed integrally with the concrete in the second pocket at the lower end of the second loop reinforcement.

Here, the first pocket and the second pocket may have a rectangular shape or a tapered shape.

Herein, the first loop reinforcement and the second loop reinforcement are reinforced with the rebar reinforcement at the bottom of the main reinforcement.

Here, the distance between the first precast concrete deck and the second precast concrete deck is 20 to 50 mm so that the cast iron and the coupling steel can be laid.

According to the present invention, the roof reinforced concrete bottom casting type pre-cast concrete deck has protrusions and protrusions in the form of barrier ribs protruding at equal intervals on both sides of the roof to form pockets between the protrusions and the pits, The loop reinforcement is horizontally protruded from the side so as to intersect the loop reinforcement formed in the pockets of the adjacent precast concrete decks and the lower end of the loop reinforcement on one side is embedded in the bottom of the pockets to secure the structure, By installing a coupling material in the pocket, it is possible to perform rapid construction without providing a separate formwork, and it is possible to improve the resistance performance between the concave and convex portions.

Further, according to the present invention, a loop reinforcement is positioned between the projections and depressions, a space for accommodating the reinforcement rods is ensured, and the bending resistance can be ensured by the reinforcement rods. Since the reinforcement rods are embedded at the bottom of the pockets, .

In addition, according to the present invention, interference with the neighboring precast concrete deck is not generated when the bottom plate is mounted, and vertical installation is possible, so that workability can be improved.

1 is a perspective view of a bottom reinforced concrete precast concrete floor according to the present invention.
2 is a plan view of Fig.
FIGS. 3A and 3B are front views of first and second precast concrete bottom slabs according to the present invention. FIG.
Fig. 4 is a plan sectional view of Fig. 1. Fig.
Fig. 5 is a longitudinal sectional view of Fig. 1; Fig.
FIG. 6 is a perspective view showing a bottom reinforced concrete precast concrete floor according to another embodiment of the present invention. FIG.
Fig. 7 is a plan view of Fig. 6. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

FIG. 2 is a plan view of FIG. 1, and FIGS. 3a and 3b are perspective views of the roof reinforced concrete bottom floor embedded type pre-cast concrete floor according to the present invention, Fig. 5 is a longitudinal sectional view of Fig. 1, Fig. 6 is a sectional view of the roof reinforced concrete bottom deck according to another embodiment of the present invention, Fig. Fig. 7 is a plan view of Fig. 6. Fig. 7 is a plan view of the pre-cast concrete bottom plate.

1 to 7, a roof reinforced concrete bottom cast type precast concrete floor 1 according to the present invention includes a first precast concrete floor 10, a second precast concrete floor 20, Lt; / RTI >

First, as shown in FIGS. 1, 2 and 3A, the first precast concrete bottom plate 10 is provided with first pockets 11, which are open at the same interval, 13), and the first loop reinforcement 15 is horizontally protruded from one side of the inner surface of each of the first pockets 13.

1, 2, and 3B, the second precast concrete bottom plate 20 is provided with a second pocket (not shown) (21) are equally spaced to form second irregularities (23), and the second loop reinforcement (25) horizontally protrudes from one side of the inner surface of each second pocket (21) The first loop reinforcing bars 15 and the second loop reinforcing bars 25 are overlapped with each other so that the first loop reinforcing bars 15 and the second loop reinforcing bars 25 are overlapped with each other while being spaced apart from the first precast concrete deck 10 by a predetermined distance, The joining material 40 is laid between the first and second concave and convex portions 13 and 23 and the first and second pockets 11 and 21 after the cast iron rope 30 is laid in the transverse direction so as to secure the resistance. At this time, it is preferable that the first and second irregularities 13 and 23 correspond one to one with each other, and it is preferable that a non-shrinkage mortar, concrete, adhesive or the like is applied to the binding material.

The length (for example, 50 mm) of the first pockets 11 of the first precast concrete deck 10 is equal to the length of the second pockets 21 of the second precast concrete deck 20 The first loop reinforcement 15 of the first precast concrete bottom plate 10 is protruded outward and inserted into the second pockets 21. [

Further, a plurality of reinforcing steel reinforcing rods 29 are laid horizontally in the lower part of the second pockets 21 of the second precast concrete bottom plate 20 to reinforce the transverse strength.

The second precast concrete bottom plate 20 is formed by embedding the lower end of the second loop reinforcing bar 25 in the second pocket 21 into the step 27 formed integrally with the concrete to increase the structural safety.

The first pockets 11 of the first precast concrete bottom plate 10 and the second pockets 21 of the second precast concrete bottom plate 20 may have a rectangular shape or a shape It may be formed in a tapered shape as shown in Figs. 6 and 7 so as to facilitate demoulding.

The first loop reinforcing bars 15 and the second loop reinforcing bars 25 are reinforced by the connecting reinforcing bars 50 at the bottom of the main reinforcing bars 30.

It is preferable that the distance between the first precast concrete bottom plate 10 and the second precast concrete bottom plate 20 is 20 to 50 mm so as to be able to accommodate the main reinforcement 30 and the coupling steel 50 Do.

The first reinforced concrete precast concrete bottom plate 1 according to the present invention has first and second pockets 11 and 21 on both sides thereof so that the first precast concrete bottom plate 10 can be installed continuously, First and second concave and convex portions 13 and 23 and first and second loop reinforcing bars 15 and 25 are formed.

Hereinafter, the joining process of the roof reinforced concrete bottom embedded type precast concrete deck according to the present invention will be described in detail with reference to the accompanying drawings.

The first precast concrete bottom plate 10 manufactured and transported to the installation site is lifted and installed.

Then, the second precast concrete bottom plate 20 is lifted and spaced apart from the side surface of the first precast concrete bottom plate 10, and at this time, the first pockets of the first precast concrete bottom plate 10 11 to be inserted into the second loop reinforcing bars 25 of the second precast concrete deck 20. Then, the first loop reinforcement 15 of the first precast concrete bottom plate 10 is inserted into the second pockets 21 of the second precast concrete deck 20 as well. At this time, the first and second loop bars 15 and 25 are formed horizontally to each other because they are positioned so as not to interfere with each other.

In this state, the main reinforcement 30 is laid horizontally between the first loop reinforcement 15 and the second loop reinforcement 25 so as to secure bending resistance at the top.

Subsequently, the first loop reinforcement 15 and the second loop reinforcement 25 are connected to each other by using a binding steel bar 50.

Subsequently, the bonding material 40 is poured into the first and second concavities 13 and 23 and the first and second pockets 11 and 21 to be integrated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

10, 20: first and second precast concrete bottom plates
11, 21: first and second pockets 13, 23: first and second unevenness
15, 25: first and second loop reinforcing bars 30:
30: binder 50:

Claims

A precast concrete bottom plate (1) assembled and connected to each other to form a precast concrete structure,
The first pockets are opened at the joints of one side and the first pockets are formed in a rectangular shape or a tapered shape in a planar shape at regular intervals to form first irregularities. A first precast concrete bottom plate which horizontally protrudes one loop reinforcement;
And second pockets having a rectangular shape or a tapered shape are installed at regular intervals to form a second concavo-convex shape so as to be symmetrical with the first precast concrete deck, Wherein the second loop reinforcement is horizontally protruded from one side of the inner side surface of the second pocket of the second pockets of the first pocket, The first and second loop reinforcing bars are symmetrically spaced apart from each other so as to secure a bending resistance on the upper portion of the first loop reinforcing bar and the second loop reinforcing bar, A plurality of reinforcing castings for reinforcing the strength in the transverse direction at the lower portion of the second pocket, And a lower end of the second loop reinforcement is embedded in a step formed integrally with the concrete in the second pocket,
The length of the first pockets of the first precast concrete deck,
Wherein the first precast concrete deck is formed with a relatively smaller length than the second pockets of the second precast concrete deck, the first loop reinforcement of the first precast concrete deck is protruded outwardly and inserted into the second pockets,
The first and second precast concrete decks are arranged in a first,
Wherein the first and second pockets, the first and second unevennesses, and the first and second loop reinforcing bars are formed on both sides of the roof reinforcing bar so as to allow continuous installation.

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