KR20170141895A - Arch structure with reinforced arch rib segment and arch structure construction method therefor - Google Patents

Abstract

The present invention relates to a rib-reinforced precast arch structure to construct an arch structure by continuously connecting segmented segments to a base portion in a longitudinal direction and a transverse direction; and to a construction method thereof, wherein the rib-reinforced precast arch structure is formed such that a segmented arch formed in a hat-shaped cross-section having an arched bent rib portion protruding to one side between both arch flange portions are connected to each other at a ceiling connection portion (A) in a transverse direction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rib-reinforced precast arch structure,

The present invention relates to a rib-reinforced precast arch and a construction method thereof. More particularly, the present invention relates to a rib-reinforced precast arch structure for connecting an arch structure by continuously connecting segment segments in a longitudinal direction and a transverse direction at a base portion, and a construction method thereof.

1A shows a construction diagram of a conventional precast arch tunnel (arch structure).

That is, the left and right split arch members 11 and 12, which are divided into precast members so that both lower ends thereof are supported by the foundation structure 1, are connected at the ceiling to form an arch structure 10, ) Are connected in series in a longitudinal direction.

At this time, the ends of the ceiling portions of the left and right segment arch members 11 and 12 are formed on both longitudinal sides of the ceiling portion with cutouts 20 cut out concavely from the end surface and the longitudinal side surface, The protruding portion 21 is formed at both ends of the ceiling portion of the right segmental arch members 11 and 12 by the formation of the cutouts 20 on both sides and the bottom portion of the cutout portion 20 is formed in the lower portion of the cutout 20 22) is present.

Further, in a state in which the left and right split arch members 11, 12 are continuously arranged in the longitudinal direction, the connecting rods 30 are longitudinally arranged between the segment arch members arranged longitudinally in the longitudinal direction, And the connecting rod (30) is fixedly fixed to the projecting portion (21) of the segmented arch member arranged so that the longitudinally spaced segmental arch members are bound;

When the ceiling end portions of the left and right segment arch members 11 and 12 are disposed to be in contact with each other, the projections 21 of the left and right segment arch members 11 and 12 are in contact with each other, The bottom plate portions 22 of the members 11 and 12 are also brought into contact with each other,

The cutouts 20 of the left and right segmental arch members 11 and 12 are also communicated between the left and right sides and the space of the communicated cutouts 20 is filled with filler (not shown) It can be seen that the arch members 11 and 12 are integrally connected to each other in a steel structure at the ceiling portion.

In this case, the left and right segment arch members 11 and 12 can be regarded as the most conventional sectional shape in which the cross-sectional shape is formed as a square cross-section.

However, the case where the left and right split arch members 11 and 12 are formed in a T-shaped section is also disclosed.

In other words, as shown in FIG. 1B, two of the T-shaped sectioned arch members 40a and 40b are provided so that the end faces directly contact with each other at the ceiling portion, and the arch flange portion 41 and the arch flange portion are provided with the arch block portion 42, Are formed, and it can be seen that they form a T-shaped cross section.

It can be seen that the arch block members 42 are formed with transverse holes so that the arch members 40a and 40b are made strong by using the transverse PC steel members 43. [

In the longitudinal direction, the longitudinal through holes 44 are formed in the arch flange portion 41, so that the longitudinal through holes 44 are tightened to each other by using the lateral PC steel (not shown).

1C, it can be seen that the arch block 42 can be formed on both the upper and lower surfaces of the arch flange 41 (hereinafter referred to as a double T shape).

That is, the conventional segmented arch members 11, 12, 40a, and 40b have been shown to have a connection by combining filler materials such as a connecting reinforcing bar and concrete at the ceiling, and a connecting method using lateral and longitudinal PC steels Considering the economical efficiency, it is preferable to make a connection by combining filler materials such as a connection reinforcing steel and concrete, and it is also advantageous in quality control and maintenance.

Further, it can be seen that the cross section of the conventional segment arch member 11, 12, 40a, 40b uses a square section, a T section or a double T section as shown in Figs. 1A and 1B. In order to compensate the sectional rigidity of the segment arch members, all of them have a limit to change the sectional shape on the premise of the arch flange portion of the rectangular cross-section, so that their own weight can be minimized, but the sectional shape maximizing the structural bending stiffness is not.

Although not shown, segmented arch members using corrugated steel plates are also introduced, but such corrugated steel plates are constructed by assembling steel plates and require separate concrete pouring, and the segmented arch members made of corrugated steel plates are merely used with connection bolts and nuts It is impossible to directly compare the arch arch members made of precast concrete as the fastening connection method.

Accordingly, it is an object of the present invention to provide a ceiling connection portion of a segmented arch capable of sufficiently securing connection rigidity and a lower support portion that is more stably supported on a base portion. However, if it is advantageous in manufacturing, The present invention provides a rib-reinforced precast arch structure and a method of constructing such a rib-reinforced precast arch structure.

In order to achieve the above object,

Sectional skeleton section arch formed with arched bent ribs protruding to one side between the both arch flange portions is connected to each other in the ceiling connection section A in the transverse direction, A horizontal connecting plate extending horizontally from a bottom surface of the hat-shaped end face A1 of the upper end of the cap-shaped end face A1 to form a space in which the ceiling connection portion concrete C1 is placed while being in contact with each other; And a connecting concave portion of a hat-shaped cross section integrally formed on the upper surface of the horizontal connecting plate and having a sectional height smaller than the sectional height of the segment arches as a solid cross section, Provided is a rib-reinforced precast arch structure capable of extending a plurality of ceiling connection connecting bars in an end connection plane (A1) and an expansion connection space (S1) formed by connecting spheres of a hat-shaped cross section.

Also preferably,

(a) supporting a lower end of a segmented arch of a hat-shaped cross-section in which arch bent ribs 120 are formed so as to protrude to one side between both arch flange portions at the base portion, and to be installed successively in the longitudinal direction; (b) The ceiling connection portion (A) connecting the upper ends of the segmental arches successively provided in the longitudinal direction extends from both the arch flange portions horizontally from the bottom surface of the hat-shaped end surface (A1) of the upper surface of the segmented arch of the hat- A horizontal connection plate for forming a space in which the ceiling connection concrete C1 is placed while being in contact with each other; And a connecting concave portion of a hat-shaped cross section integrally formed on the upper surface of the horizontal connecting plate and having a sectional height smaller than the sectional height of the segment arches as a solid sectional surface, Forming a plurality of ceiling connection connecting bars in the extended connection space S1 by the hat-shaped end face A1 and the connecting sphere of the hat-shaped cross-section; And (c) connecting the ceiling connection connecting reinforcing bars of the ceiling connecting portion A to each other so that the rib reinforcing precast arch structures are combined with each other in the longitudinal direction and the transverse direction by the ceiling connection concrete C1 A method of constructing a rib-reinforced precast arch structure is provided.

According to the present invention, it is possible to construct an arch structure that can not be designed and constructed so as to have a transverse width of 50 m or more in the past, and it is possible to reduce the amount of ground by reducing the rising ratio of the arch structure, And it is advantageous in securing the support rigidity of the lower support portion, thereby enabling more efficient construction management.

In addition, in the completed arch structure, it is more efficient in construction of openings for the provision of fire extinguishers and the like, and it is possible to determine a more reasonable installation position and number in installing the lighting facilities and the like.

FIG. 1A is a view showing a construction of a tunnel structure using a conventional segmented arch member,
1B and 1C are a perspective view, a cross-sectional view and a modified example of a conventional segmented arch member,
FIGS. 2A and 2B are a perspective view and a cross-sectional view of a segmented arch constituting a rib-reinforced precast arch structure of the present invention,
FIG. 2C is a perspective view showing the connection structure of the ceiling connection portion A of the present invention,
Figure 2d is a perspective view of a rib-reinforced precast arch structure in which the lower support (B) of the segmented arch of the present invention is shown.
FIGS. 3A, 3B and 3C show a flow diagram of a rib-reinforced precast arch structure construction method.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. 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 order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Rib reinforced precast arch structure (100)]

2A and 2B are a perspective view and a cross-sectional view of the divided arches 100a and 100b constituting the rib-reinforced precast arch structure 100 and FIG. 2C is a perspective view of the connection structure of the ceiling connection portions A of the divided arches 100a and 100b And FIG. 2D is a perspective view of a rib-reinforced precast arch structure 100 in which the lower support B of the segmented arch of the present invention is shown.

First, FIG. 2A shows a perspective view of the segmented arches 100a and 100b.

As shown in FIGS. 2A and 2C, the rib-reinforced precast arch structure 100 is formed such that the ceiling connecting portions A are connected to each other in the transverse direction, 200).

As shown in FIG. 2A, the arch arches 100a and 100b are formed by the arch bending ribs 120 protruded to one side between the two arch flanges 110. This form is referred to as a hat-shaped cross-section.

The split arches 100a and 100b of the hat-shaped cross-section are prefabricated by a factory in advance in the form of reinforced concrete products, and the flexural rigidity of the square arches of the same cross-sectional area of the same cross- There is a structural advantage.

More specifically, the arch flange 110 is formed in a curved plate shape so that a semicircular arch member can be formed when, for example, two arch flange portions 110 are laterally connected to each other at a ceiling connection portion. .

The arch flange 110 may be formed to have a thinner thickness than the conventional segmented arch so that its own weight can be reduced.

The arch bending rib portion 120 is bent between the arch flange portions 110 to form a space between the arch flange portions 110. The arch bending rib portion 120 reduces the weight of the arch arches 100a and 100b, (F / L, arch section height / transverse width) of the arch is decreased (further upwardly curved construction) to reduce the amount of soil on the upper part of the arch structure .

FIG. 2B shows a sectional view of the segment arches 100a and 100b. It can be seen that one or two or more continuous hat-shaped cross-sections may be used in which arch-bending ribs 120 are formed to protrude in one direction between the two arch flanges 110, It can be seen that the longitudinal widths of the first and second electrodes 100a and 100b can be easily adjusted.

FIG. 2C is a view showing a connection structure of the ceiling connection part A of the segment arches 100a and 100b, and FIG. 2d is a diagram showing a connection structure of the bottom support part B of the segment arch of the present invention.

That is, as shown in FIG. 2d, the segmented arches 100a and 100b of the hat-shaped cross section are formed by the ceiling connection portion A of the arch structure to connect the segmented arches to each other in the lateral direction, And a lower support portion B to support the segment arches 100a and 100b of the hat-shaped cross section on the base portion 200. [

First of all, it can be seen that the horizontal connecting plate 130 extending from both the arch flange 110 horizontally from the bottom of the hat-shaped end face A1 is formed. The horizontally connecting plate 130 extends horizontally and abuts against the horizontal connecting plate of the segmented arch 100b of the adjacent hat-shaped section at the ceiling connecting portion to form a space in which the ceiling connecting portion concrete C1 is installed as shown in FIG. 2d It acts as a form.

It will be appreciated that a connection member 140 having a hat-shaped cross section formed in a solid cross-section is integrally formed on the upper surface of the horizontal connection plate 130.

The connecting spheres 140 of the hat-shaped cross-section are integrally formed with the hat-shaped end surface A1 of the hatched section of the segment arches 100a and 100b while the other end thereof is integrally formed with the shear- And the ceiling connecting portion connecting reinforcing bar 160 extends from the hat-shaped end face A1 to the space above the connecting sphere 140 of the hat-shaped section.

In other words, on the upper surface of the horizontal connection plate 130, a connecting sphere (hat-shaped cross-section) integrally formed with a sectional height smaller than the sectional height (upper surface reference) of the segment arches 100a and 100b 140 and the extension connecting space S1 formed by the horizontal connecting plate 130, the hat-shaped end face A1 of the hat-shaped cross-section segment arch 100a, and the cap- It is possible to secure the connection rigidity of the ceiling connection part to a greater extent and to secure the connection rigidity of the ceiling connection part.

The present invention is characterized in that the partition arches 100a and 100b adjacent to each other in the ceiling connection portion A are set so as to be connected to each other in the transverse direction and the connecting spheres 140 of the hat- It can be seen that the shear key 151 and the front end groove 152 allow the mechanical connection of the segment arches 100a and 100b to each other,

At this time, the horizontal connection plates 130 of the hat-shaped sectional arches 100a and 100b are brought into direct contact with each other, and the ceiling connection portion connecting reinforcing bars 160 are connected to each other as shown in FIG. It can be seen that the rib-reinforced precast arch structures 100 in the ceiling connection portion are integrated with each other in the longitudinal direction and the transverse direction.

Further, the rib-reinforced precast arch structure 100 formed so that its side surfaces are in contact with each other in the longitudinal direction is integrally formed in the longitudinal direction by the upper concrete C2 installed integrally with the ceiling connection concrete C1. .

Although the upper concrete C2 may not be installed, it is very advantageous to integrate the rib-reinforced precast arch structure 100 when the upper concrete C2 is laid together with the height of the pile of the concrete C1.

2D, the hat-shaped end face A1 of the segmented arch 100a of the hat-shaped cross section is bent in a bending space (not shown) by the arch rib bend 120 S2 are also buried together to have a rectangular cross-section, the bending part embedded concrete 170 is integrally formed and the sectional area supported by the base part 200 is increased, so that the supporting rigidity can be increased.

As a result, the rib-reinforced precast arch structure 100 according to the present invention makes use of the advantages of the cross-sectional shape, so that the lower end support portion B can be used for a tunnel structure having a large transverse width, A more suitable structure is obtained.

It is preferable that the bending part embedded concrete 170 is integrally formed when the segment arches 100a and 100b are manufactured, but it may be formed by using a formwork or the like in the field.

The lower support part B is seated and fixed to the support groove 210 of the base part 200 by using a coupling member 220 such as an anchor rod and a non-shrinkage mortar, It is preferable that the support portion B further includes a waterproof sheet and a protection material on its inner surface to prevent water leakage and the like.

[Construction method of rib-reinforced precast arch structure (100)] [

FIGS. 3A, 3B, and 3C show a flowchart of a rib-reinforced precast arch structure 100 construction method. This will be described as an eco-bridge construction method.

First, as shown in FIG. 3A, the foundation 200 is constructed through a trowel or the like, and the foundation 200 is extended in the longitudinal direction.

Preferably, the base portion 200 is formed on the upper surface so that the support grooves are continuously formed in the longitudinal direction so that the lower support portion B of the rib-reinforced precast arch structure 100 is inserted and supported.

The segmental arches 100a and 100b are manufactured at a factory or the like and then transported to the site so that the lower support portion B of the two segmental arches 100a and 100b is inserted into the base portion 200 to be seated, And the connecting portions B are set in contact with each other in the lateral direction.

The lower support portion B of the segmental arch 100a or 100b is seated on the base portion 200 and the connection members 140 having a hat-shaped cross section in the lateral direction of the ceiling connection portion A are connected to the shear keys 151 And the front end groove 152 are mechanically connected to each other, and both horizontal connecting plates 130 are brought into horizontal alignment with each other.

Next, as shown in FIG. 3B, the segmented arches 100a and 100b are extended so as to contact each other in the longitudinal direction. As a result, the side surfaces of the segmented arches 100a and 100b are in contact with each other while the lower support portions B are stably installed continuously in the longitudinal direction, and the side surfaces of the ceiling connection portion A are also contacted with each other in the transverse direction and longitudinal direction, As shown in FIG. The number of longitudinally installed sections of these segmental arches 100a, 100b will be determined in consideration of the longitudinal extension length of the arch structure and the like.

Next, as shown in FIG. 3C, the ceiling-portion connecting concrete C1 is installed on the segment arches 100a and 100b set in the lateral direction and the longitudinal direction.

As described above, since the horizontal connecting plates 130 of the connecting spheres of the hat-shaped cross-section constituting each of the segmented arches 100a and 100b are in contact with each other, The connecting part connecting reinforcing bars 160 are connected to each other such as by using a wire or a coupler so that the ceiling connecting part concrete C1 is placed and cured in the extending connection space S1 so that the parting arches 100a and 100b are moved in the longitudinal direction So that they are integrated with each other in the lateral direction.

Next, the partition arches 100a and 100b, which are set to the same thickness as the ceiling connection concrete C1 and set in the lateral direction and the longitudinal direction, are integrated with each other in the longitudinal direction. Next, the bending space S2 formed by the hat-shaped cross-section of the end connecting portion B formed to contact the side surfaces in the longitudinal direction is filled with the bent portion filled concrete 170 to have a rectangular cross-section so that the lower supporting portion B So that the sectional area supported by the base portion 200 is increased, so that the support rigidity can be increased.

The rib-reinforced precast arch structure 100 of the present invention is configured to be mechanically connected by the shear keys 151 and the front end grooves 152 of the connecting member 140 of the hat-shaped cross section at the ceiling connection portion A And the ceiling connecting portion connecting reinforcing bars 160 are connected to each other so that the rib reinforcing precast arch structures 100 are combined with each other in the longitudinal direction and the transverse direction by the ceiling connecting portion concrete C1, (100) completes the arch structure (100) through an upper cover or the like.

As a result, the divided arches 100a and 100b constituting the rib-reinforced precast arch structure 100 according to the present invention are precast members having increased support rigidity based on the same cross-sectional area as a rectangular cross-section, It is possible to construct a structure having a transverse width of about 1 mm and a relatively large self weight so that it is suitable for transportation and construction.

In addition, since the bottom supporting portion B of the rib-reinforced precast arch structure 100 is provided with a space for installing a fire extinguisher or the like by the bending space S2,

And an anchor for installing a lighting facility around the ceiling connection portion is also installed using the bending space S2 so that the installation space can be efficiently utilized while using the non-structural member,

As the section rigidity increases, the rise ratio (F / L, arch section height / transverse width) of the arch can be relatively reduced, which minimizes the amount of soil, which makes it possible to construct arch structures with very economical efficiency.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a concatenated manner.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: rib-reinforced precast arch structure
100a, 100b: a segmented arch of a hat-shaped cross section
110: Arch flange portion 120: Arch bending rib portion
130: horizontal connecting plate 140: connecting sphere of hat-shaped section
151: Shear key 152: Shear groove
160: Ceiling connection connection reinforcing bar 170: Bent part filling concrete
200: foundation part A: ceiling connection part
A1: Hat-shaped end face B: Lower support
C1: Ceiling connection concrete C2: Upper concrete
S1: Extended connection space S2: Bending space

Claims (10)

Sectional arches 100a and 100b of a hat-shaped cross section formed by arched bending ribs 120 formed to protrude to one side between both arch flange portions 110 are laterally connected to each other at a ceiling connection portion A,
The ceiling connection part A extends from both the arch flange part 110 horizontally from the bottom surface of the hat-shaped end surface A1 of the top surface of the segmented arch of the hat-shaped cross section and abuts against each other to define a space in which the ceiling connection part concrete C1 is installed A horizontal connecting plate (130) for forming a horizontal connecting plate; And a connecting member 140 having a hat-shaped cross-section integrally formed on the upper surface of the horizontal connecting plate 130 and having a sectional height smaller than the sectional height of the segment arches 100a and 100b, A plurality of ceiling connection connecting bars 160 are extended in the expansion connection space S1 formed by the plate 130, the hat-shaped end face A1 of the hat-shaped cross-sectional arch, and the connection sphere 140 of the hat- Rib-reinforced precast arch structures that allow for easy access. The method according to claim 1,
Wherein the segmented arch formed in the hat-shaped cross-section includes at least one arch-bend rib portion (120) between the two arch flanges (110). The method according to claim 1,
The arch arches 100a and 100b formed in a hat-shaped cross section having arch bent ribs 120 protruded to one side between the both arch flange portions 110 are connected to each other at the ceiling connection portion A in the lateral direction, And the side surfaces of the segmented arches (100a, 100b) are connected to each other in the longitudinal direction while being in contact with each other. The method of claim 3,
The lower ends of the longitudinally spaced segmented arches 100a and 100b are supported on the upper surface of the base portion 200 so that the portion supported by the base portion 200 is bent in the bending space S2) is filled with the reinforced concrete structure (170) so that the cross-sectional area supported by the foundation (200) is increased. The method according to claim 1,
The ceiling connection part connecting reinforcing bars 160 in the ceiling connection part A are connected to each other so that the rib reinforcing precast arch structures 100 are combined with each other in the longitudinal direction and the transverse direction by the ceiling connection part concrete C1. Precast arch structures. 6. The method of claim 5,
The segment arches 100a and 100b formed such that the side surfaces thereof are in contact with each other in the longitudinal direction are integrally formed in the longitudinal direction by the upper concrete C2 integrally installed with the ceiling connection portion concrete C1. structure. (a) The lower ends of the arch arches 100a and 100b of the hat-shaped cross section, in which the arch bending ribs 120 are formed so as to protrude to one side between both the arch flange portions 110, are supported on the base portion 200, So as to be continuously installed;
(b) The ceiling connection part (A) where the upper ends of the segment arches (100a, 100b) provided in the longitudinal direction are connected to each other is horizontally arranged from the bottom of the hat-shaped end surface (A1) A horizontal connection plate 130 extending from the flange portion 110 and contacting with each other to form a space in which the ceiling connection portion concrete C1 is installed; And a connecting sphere 140 having a hat-shaped cross-section integrally formed on the upper surface of the horizontal connecting plate 130 and having a sectional height smaller than the sectional height of the segment arches 100a and 100b, The ceiling connection connecting bar 160 is connected to the expansion connecting space S1 by the horizontal connecting plate 130, the hat-shaped end face A1 of the hat-shaped cross-section segment arch 100a and the connecting- To form a plurality of extensions; And
(c) connecting the ceiling connecting portion connecting reinforcing bars 160 of the ceiling connecting portion A so that the rib reinforcing precast arch structures 100 are combined with each other in the longitudinal direction and the transverse direction by the ceiling connecting portion concrete C1 The method comprising the steps of: (a) providing a rib-reinforced precast arch structure; 8. The method of claim 7,
In the step (b), the shear key 151 and the front end groove 152 formed on the side surfaces of the connecting sphere 140 of the hat-shaped cross section constituting the segment arches 100a and 100b adjacent to each other in the ceiling connection part A, A method of constructing a rib-reinforced precast arch structure that allows mechanical interposition between arches (100a, 100b). 8. The method of claim 7,
The lower ends of the segment arches 100a and 100b which are inserted into the upper surface of the base part 200 and contact with each other in the longitudinal direction after the step (c) are inserted into the bending space S2 by the arch rib bending part 120, (D) so as to increase the cross-sectional area of the bent part embedded concrete (170) integrally formed and supported by the base part (200) so as to form the rib-reinforced precast concrete structure. 10. The method of claim 9,
The lower support portion B is seated and fixed to the support groove 210 of the base portion 200 by using a coupling hole 220 including an anchor rod and a non-shrinkage mortar, (B) is further provided with a waterproof sheet and a protection material on the inner surface thereof.

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