KR102298436B1 - Vertical concrete structure and method for constructing the same - Google Patents

Abstract

Disclosed are a concrete vertical structure and a construction method thereof, which enable a PC slab to be strongly coupled to a vertical wall to improve anti-vibration stability, improve constructability by use of a temporary fixing device and application of a slip form method for holding the PC slab without installation of an additional bracket, reduce a construction period, and improve economic efficiency. The concrete vertical structure comprises: a vertical wall installed in a vertical direction on the ground or the underground; and the PC slab installed on an inner circumferential surface of the vertical wall in a horizontal direction. A connection space unit for post-application of concrete is formed between the PC slab and the vertical wall, a rebar for a connection unit is installed in the connection space unit, and the concrete is applied to enable the PC slab and the vertical wall to be strongly coupled.

Description

Concrete vertical structure and its construction method

The present invention relates to a concrete vertical structure and a construction method thereof, and more particularly, to a concrete vertical structure such as an underground power outlet, a communication port, a vertical entrance of a subway, a connecting passage and a ventilation opening, and a construction method thereof.

In general, various concrete vertical structures are constructed in underground power outlets, communication ports, vertical entrances and exits of subways, connecting passages and ventilation ports, underground storage facilities, and the like. For example, in order to prevent pollution due to various harmful gases and fine dust generated during subway line construction, it is mandatory to have a passage connecting the ground and the basement so that air is circulated at every predetermined section.

To explain the construction method of such a concrete vertical structure as an example, first excavate a vertical hole from the ground to the basement, install a steel structure on the inner circumferential surface of the vertical hole, or pour concrete mortar to prevent the vertical tunnel structure from collapsing. After installing the formwork by arranging the reinforcing bars from the bottom of the craftsman and pouring the base concrete, when the base concrete is cured, the formwork is dismantled and the waste materials are collected from the ground to complete the construction.

Meanwhile, Korean Patent Laid-Open Publication No. 10-2009-0047575 (2009.05.13), which was previously applied for, discloses a slip form for an underground vertical tunnel structure and a construction method for an underground vertical tunnel structure using the same. However, in the conventional concrete vertical structure and its construction method, since a bracket for supporting the PC slab must be additionally installed on the vertical wall, the workability is poor, the construction period is long, the economic feasibility is low, and the vertical wall and the PC slab are rigidly joined. There is a problem that seismic safety is deteriorated because there is no seismic safety.

Patent Literature: Republic of Korea Patent Publication No. 10-2009-0047575 (2009.05.13)

In order to solve the conventional problems, in the present invention, the seismic safety is improved by strengthening the PC slab with a vertical wall, and a temporary fixing device for mounting the PC slab without installing a separate bracket to support the PC slab is used and the slip form method To provide a concrete vertical structure that can improve constructability by application, etc., shorten construction period and improve economic feasibility, and a construction method thereof.

The concrete vertical structure according to the present invention is a concrete vertical structure including a vertical wall installed on the ground or underground in a vertical direction, and a PC slab installed in a horizontal direction on an inner circumferential surface of the vertical wall, between the PC slab and the vertical wall. A connection space is formed for concrete post-casting, and a connection reinforcing bar is installed in the connection space, and concrete is poured to strengthen the connection between the PC slab and the vertical wall.

A coupler is pre-buried in the vertical wall, and a headed bar is installed in the coupler later, so that the vertical wall and the PC slab are rigidly connected.

A coupler is pre-buried in the vertical wall, and after installing a connecting reinforcing bar in the coupler, the connecting reinforcing bar is welded or overlapped to strengthen the vertical wall and the PC slab.

A coupler is pre-buried in the PC slab, and a connection reinforcing bar is installed in the coupler of the PC slab to be coupled with the connecting reinforcing bar installed in the vertical wall.

In addition, a bracket portion is formed to protrude from the end of the PC slab facing the inner circumferential surface of the vertical wall, and the bracket portion covers the lower portion of the connection space portion.

A chamfer is formed at the end of the bracket to be inclined, and a spacer is formed between the end of the bracket and the inner wall surface of the vertical wall, and a sealing material for preventing the loss of concrete is inserted into the spacer, the cross-sectional shape of the sealing material is It is made in a wedge shape to correspond to the chamfer.

The bracket part may further include one or a plurality of ribs extending vertically from the end surface of the PC slab and the bottom surface of the bracket part.

A fixing device in the form of an eye bar is embedded in the PC slab and the vertical wall, and a length-adjustable bar member is connected to the fixing device of the PC slab and the vertical wall to temporarily fix the PC slab and the vertical wall.

The PC slab is composed of an outer panel positioned on both sides in the width direction by connecting a plurality of unit panels in the width direction and an inner panel positioned between the outer panel, and the inner panel has main reinforcing bars reinforced in one direction in the longitudinal direction, In the outer panel, the main reinforcing bars are reinforced in two directions in the longitudinal direction and the width direction in some sections facing the inner panel, and the main reinforcing bars are reinforced in one direction in the width direction in other sections located on both sides in the width direction.

The PC slab is composed of an outer panel positioned on both sides in the width direction by connecting a plurality of unit panels in the width direction, and an inner panel positioned between the outer panel, and a connecting reinforcing bar is installed in the vertical wall of the inner panel connecting part in the longitudinal direction. And, on the vertical wall of the outer panel connection part, the connecting part reinforcing bar is installed in some sections facing the inner panel in the longitudinal direction, and the connecting part reinforcing bar is installed in the other section located on both sides in the width direction in the width direction.

One or a plurality of intermediate walls may be further provided on the inside of the vertical wall.

A girder connected to the vertical wall in a horizontal direction is further provided inside the vertical wall, and the girder supports the PC slab.

The cross section of the PC slab is composed of one of a solid type with a filling inside, a hollow type with a space formed therein, an upward rib type with an uneven top, and a downward rib type with an uneven bottom, or a combination thereof.

On the other hand, the construction method of the concrete vertical structure according to the present invention comprises the steps of installing a connecting portion reinforcement to the vertical wall and the PC slab; Temporarily mounting the PC slab to the vertical wall by installing a length-adjustable bar member between the vertical wall and the PC slab; inserting a sealing material by spaced apart a predetermined distance between the inner wall surface of the vertical wall and the end of the bracket portion of the PC slab; And it includes the step of hardening by pouring concrete after the connection space between the vertical wall and the PC slab.

The concrete vertical structure and its construction method according to the present invention can improve seismic safety by rigidly bonding a vertical wall and a PC slab, minimize on-site work, improve workability, shorten construction period and improve economic feasibility, as well as ease of operation It is advantageous in terms of aspect and is a very useful invention that can stably implement the fixed state between the vertical wall and the PC slab.

In addition, the concrete vertical structure and its construction method according to the present invention can improve structural safety by optimizing and determining the reinforcement direction of the connection part between the PC slab and the vertical wall in consideration of the flow of force due to the rigidity between the PC slab and the vertical wall. .

1 is a partially cut-away perspective view showing a concrete vertical structure according to an embodiment of the present invention;
2 and 3 are enlarged cross-sectional views illustrating a connection structure between a vertical wall and a PC slab according to an embodiment of the present invention;
4 to 6 are enlarged cross-sectional views illustrating the connection structure of the vertical wall and the PC slab according to the modified example of FIG. 3,
7 is a perspective view showing a sealing material according to an embodiment of the present invention,
8 is a perspective view showing a PC slab according to a modified example of the present invention;
9 shows a cross-section of a PC slab according to a modified example of the present invention,
10 is a plan view of a vertical concrete structure according to an embodiment of the present invention;
11 is a plan view showing a PC slab reinforcement and a connection part of a vertical concrete structure according to an embodiment of the present invention;
12 is a plan view showing details of a vertical wall and a PC slab connection part according to an embodiment of the present invention;
13 is a plan view partially showing a rearrangement view of a PC slab according to an embodiment of the present invention;
14 is a partially cut-away perspective view showing a vertical concrete structure according to a modification of FIG. 1;
15 is a perspective view of a concrete vertical structure provided with a girder according to another modified example;
16 is a plan view of a concrete vertical structure provided with a girder according to another modified example;
17 is a cross-sectional view showing a shear connection between PC slabs according to an embodiment of the present invention;
18 is a cross-sectional view showing a connection method between PC slabs through pouring topping concrete according to a modified example of the present invention;
19 is a flowchart illustrating a method of constructing a vertical concrete structure according to an embodiment of the present invention.

Hereinafter, the technical configuration of the concrete vertical structure and its construction method will be described in detail according to the accompanying drawings.

1 to 13 , a concrete vertical structure according to an embodiment of the present invention includes a vertical wall 10 and a PC slab 20 . In the following description, the left-right direction in FIG. 10 is the longitudinal direction, and the up-down direction is the width direction. The direction is arbitrarily set for convenience of explanation.

The vertical wall 10 is installed on the ground or underground in a vertical direction, and when installed underground, it can be formed by excavating a vertical tunnel space in the ground, pouring concrete to a predetermined wall thickness, and hardening. Preferably, the vertical wall 10 can shorten the air and secure the workability by applying the slip-form method.

On the other hand, the vertical wall 10 may further include one or a plurality of intermediate walls 19 on the inside as shown in FIG. 14 , and may be formed by various other methods without being limited only to the slip form method.

A coupler 35 and a fixing device 50 in the form of an eye bar are pre-embedded in the vertical wall 10 in advance. The coupler 35 may be formed in a single layer or a plurality of layers in the height direction. The fixing device 50 is disposed adjacent to the coupler 35 , and disposed so as to be positioned above the coupler 35 by a predetermined height.

The coupler 35 of the vertical wall 10 is for post-installation of the connector reinforcement 40 together with the coupler 30 embedded in the PC slab 20, and the fixing device 50 embedded in the vertical wall 10 is for connecting the length-adjustable rod member (60). For example, the rod member 60 may be implemented as a turnbuckle. The temporary fixing state between the vertical wall 10 and the PC slab 20 can be stably controlled by positioning the fixing device 50 of the vertical wall 10 above the coupler 35 and appropriately adjusting the separation distance therebetween. .

The PC slab 20 is installed on the inner circumferential surface of the vertical wall 10 in the horizontal direction, and has a disk shape as a whole and a plurality of unit panels are connected in the width direction. That is, the PC slab 20 is composed of an outer panel 22 positioned on both sides in the width direction and a plurality of inner panels 23 positioned between the outer panel 22 .

The coupler 30 and the fixing device may be pre-buried in the PC slab 20 so as to correspond to the coupler 35 and the fixing device 50 pre-embedded in the vertical wall 10 . In this way, the coupler is pre-buried in the PC slab 20 and the vertical wall 10, and the connecting part reinforcing bar 40 is installed and connected afterwards.

In this case, the connection space 72 is formed between the PC slab 20 and the vertical wall 10 . The connection space 72 is a space for concrete post-casting. A bracket portion 25 is formed to protrude from the end of the PC slab 20 facing the inner circumferential surface of the vertical wall 10 . That is, the bracket part 25 is a push-resistant support part, and extends from the lower end of the PC slab 20 toward the vertical wall 10 to cover the lower part of the connection space part 72 .

An inclined chamfer 26 is formed at an end of the bracket part 25 in the longitudinal direction. In addition, a spaced portion 71 is formed with a predetermined distance between the end of the bracket portion 25 and the inner wall surface of the vertical wall 10 to form a space. In this way, by forming the spaced portion 71 between the end of the bracket portion 25 and the inner wall surface of the vertical wall 10, it is possible to improve the workability.

In addition, the sealing material 80 is inserted into the separation portion 71 . The sealing material 80 is to prevent the loss of concrete, and is pre-fabricated to fill the gap between the end of the bracket part 25 and the inner wall surface of the vertical wall 10 to complete the preliminary preparation for pouring concrete. The cross-sectional shape of the sealing material 80 has a wedge portion 81 formed in a wedge shape to correspond to the chamfer portion 26 of the bracket portion 25 .

The wedge portion 81 of the sealing material 80 is caught by the chamfer 26 of the bracket portion 25 , and the sealing material 80 is coupled without leaving the lower portion of the bracket portion 25 . On the other hand, concrete is poured into the connection space 72 formed between the vertical wall 10 and the PC slab 20 to strengthen the connection between the PC slab 20 and the vertical wall 10 . In this way, by forming the rigid portion 90 between the PC slab 20 and the vertical wall 10, it is possible to improve seismic safety, improve workability, shorten construction period, and improve economic efficiency.

In addition, as described above, the fixing device 50 is embedded in the PC slab 20 and the vertical wall 10 . In addition, the bar member 60 is connected to the fixing device 50 of the PC slab 20 and the vertical wall 10 to temporarily fix the PC slab 20 and the vertical wall 10 . The bar member 60 is removed when the concrete hardening between the PC slab 20 and the vertical wall 10 is completed. As such, by implementing the temporary fixing and dismantling between the PC slab 20 and the vertical wall 10 through the pre-buried fixing device 50 and the rod member 60, it provides ease of construction and contributes to shortening the construction period. .

On the other hand, the connection part reinforcement 40 is installed in the connection space 72 formed between the vertical wall 10 and the PC slab 20, and concrete is poured, so that there is a gap between the PC slab 20 and the vertical wall 10. is hardened In this case, the coupling structure of the connecting part reinforcing bar 40 may be implemented by a method such as a headed bar coupling structure, a welding joint, or an overlapping joint.

That is, as shown in FIG. 3 , the coupler 35 is pre-buried in the vertical wall 10 , and the connection part reinforcing bar 40 composed of a headed bar or the like is installed in the coupler 35 afterward, and also in the PC slab 20 . The coupler 30 is pre-buried and the connection part reinforcement 40 composed of a headed bar is installed in the coupler 30, and the connection part reinforcement such as a headed bar installed in the vertical wall 10 and the PC slab 20, respectively ( 40), the vertical wall 10 and the PC slab 20 are connected.

In addition, as shown in Fig. 4, the coupler 35 is pre-buried in the vertical wall 10, and the connection part reinforcing bar 40 composed of a headed bar, etc. is installed in the coupler 35 afterward, and the PC slab 20 has It is also possible to connect the vertical wall 10 and the PC slab 20 through the coupling of the connecting part reinforcing bar 40 composed of a headed bar formed on the PC slab 20 without pre-buying the coupler.

In addition, as shown in FIG. 5 , the coupler 35 is pre-buried in the vertical wall 10 , and after installing the connector reinforcing bar 40 in the coupler 35 , the connecting reinforcing bar 40 is welded to the welded joint. It is also possible to connect the vertical wall 10 and the PC slab 20 by forming (45).

In addition, as shown in FIG. 6 , the coupler 35 is pre-embedded in the vertical wall 10 , and after installing the connecting portion reinforcing bar 40 in the coupler 35 , the connecting reinforcing bar 40 is overlapped to overlap the joint. It is also possible to connect the vertical wall 10 and the PC slab 20 by forming (46).

Meanwhile, as shown in FIG. 8 , one or a plurality of ribs 27 may be further provided in the bracket unit 25 . As shown, the number of ribs 27 may be appropriately increased or decreased according to the conditions of the PC slab 20 . The rib 27 is formed to extend vertically from the end surface of the PC slab 20 and the bottom surface of the bracket part 25 . The rib 27 serves to reinforce the rigidity of the bracket part 25 and prevent damage.

In addition, as shown in FIG. 9 , the cross section of the PC slab 20 is of a solid type with a filling inside, a hollow type with a space formed therein, an upward rib type with an uneven top, and a downward rib type with an uneven shape at the bottom. It may consist of one or a combination thereof.

On the other hand, in the inner panel 23, the main reinforcing bars 21 are reinforced in one direction in the longitudinal direction in consideration of the stress flow due to the rigidity with the vertical wall. In addition, in the outer panel 22, in consideration of the stress flow due to the rigidity with the vertical wall, the main reinforcing bars 21 are reinforced in two directions in the longitudinal and width directions in some section S2 facing the inner panel 23. and the main reinforcing bars 21 are reinforced in one direction in the width direction in another section S1 located on both sides in the width direction.

In addition, in the vertical wall 10 of the connecting portion of the inner panel 23, the connecting reinforcing bar 40 is installed in the longitudinal direction in consideration of the stress flow due to the rigidity with the vertical wall. In addition, the vertical wall 10 of the connection part of the outer panel 22 is longitudinally connected to the reinforcing bar 40 in a partial section S2 facing the inner panel 23 in consideration of the stress flow due to rigidity with the vertical wall. ) is installed, and the connecting part reinforcing bar 40 is installed in the other section (S1) located on both sides in the width direction in the width direction.

In this case, the other sections S1 located on both sides in the width direction may set the section range to a diameter of 0.1D, which is approximately 1/10 of the inner diameter D of the vertical wall 10 . The diameter range of the S1 section can be appropriately changed in design. In the S2 section, the flow of stress occurs in both directions. That is, in the partial section S2 facing the inner panel 23, stress is generated in the longitudinal direction and the width direction.

On the other hand, if the force acting on the PC slab 20 is analyzed, the inner panel 23 receives a large force in the longitudinal direction after concrete hardening between the PC slab 20 and the vertical wall 10, and the outer panel 22 is It acts like a cantilever and receives a large force in the width direction. In the S1 section of the outer panel 22, the main reinforcing bars are densely reinforced in the width direction. In addition, the section S2 of the outer panel 22 is a section in which a large force is applied in the longitudinal direction, and the connecting reinforcing bars 40 are also installed in the longitudinal direction, and the main reinforcing bars are also densely reinforced in the longitudinal direction.

In addition, referring further to FIGS. 15 and 16 , a girder 99 connected to the vertical wall 10 in the horizontal direction may be further provided inside the vertical wall 10 . The girder 99 supports the PC slab 20, and when the opening 98 is required inside the PC slab 20 due to the installation of stairs or ventilation ducts, the girder 99 is vertically installed around the opening 98. By connecting and installing the wall 10 to support the PC slab 20, the structural safety of the PC slab 20 around the opening 98 can be secured.

In addition, as shown in FIG. 17 , the connection between the PC slabs 20 forms a recess formed in the cross-section facing the PC slabs 20, and the shear connection part through cement milk grouting, etc. between the PC slabs 20 (97) may be formed. On the other hand, as shown in FIG. 18 , in various cross-sectional structures of the PC slab 20 , it is also possible that the topping concrete 28 is poured on the PC slab 20 when the PC slabs 20 are connected. In addition, it is also possible to introduce a prestress to the PC slab 20 separately from the structure of the PC slab 20 described above.

Referring further to FIG. 19 , the construction method of a concrete vertical structure according to an embodiment of the present invention includes the steps of installing a connecting part reinforcing bar 40 on the vertical wall 10 and the PC slab 20 , and a rod with adjustable length. The step of temporarily mounting the PC slab 20 in the vertical wall 10 using the member 60, the step of inserting the sealing material 80, the step of pouring concrete into the connection space 72, and the PC It is made including the step of connecting the slabs.

First, after embedding the couplers 35 and 30 in the vertical wall 10 and the PC slab 20, a step of post-installing the connecting reinforcing bar 40 is performed. Thereafter, the bar member 60 is installed between the vertical wall 10 and the PC slab 20 , and the PC slab 20 is temporarily mounted on the vertical wall 10 . Thereafter, the sealing material 80 is inserted between the inner wall surface of the vertical wall 10 and the end of the bracket portion 25 of the PC slab 20 by a predetermined interval.

Thereafter, the connection portion between the vertical wall 10 and the PC slab 20 is reinforced by pouring concrete afterward. Thereafter, a step of shear connecting the outer panel 22 and the inner panel 23 to each other is performed. In the above, the construction of the vertical wall 10 can be performed by applying the slip-form method to shorten the air and secure the workability.

Up to now, the concrete vertical structure and its construction method according to the present invention have been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and it is understood that various modifications and equivalent other embodiments are possible by anyone skilled in the art. will understand Accordingly, the true technical protection scope should be determined by the technical spirit of the appended claims.

10: vertical wall 20: PC slab
21: main reinforcing bar 22: outer panel
23: inner panel 25: bracket part
26: chamfer 27: rib
28: topping concrete 30,35: coupler
40: connection reinforcing bar 45: welded joint
46: overlap joint 50: fixing device
60: bar member 71: spaced part
72: connection space 80: sealing material
81: wedge portion 90: rigid portion

Claims (14)

In the concrete vertical structure comprising a vertical wall installed in the vertical direction on the ground or underground, and a PC slab installed in the horizontal direction on the inner circumferential surface of the vertical wall,
A connection space for concrete post-casting is formed between the PC slab and the vertical wall, and a connection reinforcing bar is installed in the connection space and concrete is poured to strengthen the connection between the PC slab and the vertical wall,
A bracket part is formed to protrude from the end of the PC slab facing the inner circumferential surface of the vertical wall, and the bracket part covers the lower part of the connection space,
A chamfer is formed at the end of the bracket to be inclined, and a spacer is formed between the end of the bracket and the inner wall surface of the vertical wall, and a sealing material for preventing the loss of concrete is inserted into the spacer, the cross-sectional shape of the sealing material is A concrete vertical structure formed in a wedge shape to correspond to the chamfer. The method of claim 1,
A concrete vertical structure in which a coupler is pre-buried in the vertical wall, and a headed bar is installed in the coupler after the vertical wall and the PC slab are rigidly connected. The method of claim 1,
A concrete vertical structure in which a coupler is pre-buried in the vertical wall, and a connection reinforcing bar is installed in the coupler, and then the connection reinforcing bar is welded or overlapped to strengthen the vertical wall and the PC slab. 4. The method of claim 2 or 3,
A concrete vertical structure in which a coupler is pre-buried in the PC slab, and a connection reinforcing bar is installed in the coupler of the PC slab to be combined with a connecting reinforcing bar installed in a vertical wall. delete delete The method of claim 1,
In the bracket part,
A concrete vertical structure further comprising one or a plurality of ribs extending vertically from the cross-section of the PC slab and the bottom surface of the bracket. 4. The method according to any one of claims 1 to 3,
A concrete vertical structure in which a fixing device in the form of an eye bar is embedded in the PC slab and the vertical wall, and a rod member capable of adjusting the length is connected to the fixing device of the PC slab and the vertical wall to temporarily fix the PC slab and the vertical wall . 4. The method according to any one of claims 1 to 3,
The PC slab is composed of an outer panel located on both sides in the width direction by connecting a plurality of unit panels in the width direction, and an inner panel located between the outer panel,
In the inner panel, main reinforcing bars are reinforced in one direction in the longitudinal direction,
The outer panel is a concrete vertical structure in which the main reinforcing bars are reinforced in two directions in the longitudinal direction and the width direction in some sections facing the inner panel, and the main rebars are reinforced in one direction in the width direction in other sections located on both sides in the width direction. 4. The method according to any one of claims 1 to 3,
The PC slab is composed of an outer panel located on both sides in the width direction by connecting a plurality of unit panels in the width direction, and an inner panel located between the outer panel,
On the vertical wall of the inner panel connection part, the connection part reinforcing bar is installed in the longitudinal direction,
In the vertical wall of the outer panel connection part, the connecting part reinforcing bars are installed in some sections facing the inner panel in the longitudinal direction, and the connecting part reinforcing bars are installed in the other sections located on both sides in the width direction in the width direction. 4. The method according to any one of claims 1 to 3,
Concrete vertical structure further comprising one or a plurality of intermediate walls on the inside of the vertical wall. 4. The method according to any one of claims 1 to 3,
A concrete vertical structure further comprising a girder connected to the vertical wall in a horizontal direction inside the vertical wall, wherein the girder supports the PC slab. 4. The method according to any one of claims 1 to 3,
The cross section of the PC slab is
A concrete vertical structure composed of one of a solid type with a filling inside, a hollow type with a space formed inside, an upward rib type with an uneven top, and a downward rib type with an uneven bottom, or a combination thereof. delete

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