KR102908529B1 - Waveform Steel Sheet Structure with Improved Workability and Stability - Google Patents

Abstract

The present invention relates to a corrugated steel plate structure having secured constructability and stability.
The present invention relates to a corrugated steel plate structure having secured constructability and stability, which is formed by combining a plurality of corrugated steel plate segments having a plurality of peaks and valleys and bent at a predetermined curvature, and fixing both ends of an arch-shaped tunnel portion to a foundation concrete portion formed on the ground, the corrugated steel plate structure including: a plurality of lower support members that are bent in an arch shape to extend along the arch-shaped tunnel portion, are installed in inner valleys of the arch-shaped tunnel portion to support the arch-shaped tunnel portion from the inside, and are installed so as to be spaced apart from each other along the longitudinal direction of the arch-shaped tunnel portion; and fixing brackets that are installed so as to be spaced apart along the arch direction of the lower support members so as to fix the arch-shaped tunnel portion to the lower support members.
Accordingly, the present invention is a method in which the upper load acting on the arch-shaped tunnel section due to soil, etc. is transmitted and distributed to the foundation concrete section through the lower support member, the lower support member supports the upper load, and the corrugated steel plate forming the arch-shaped tunnel section performs the function of preventing soil, sand, and seepage water from flowing into the interior of the structure, thereby functionally completely separating the corrugated steel plate and the lower support member, thereby ensuring the structural stability and constructability of the corrugated steel plate structure.

Description

Waveform Steel Sheet Structure with Improved Workability and Stability

The present invention relates to a corrugated steel plate structure with secured constructability and stability, and more specifically, to a corrugated steel plate structure with secured constructability and stability, in which a plurality of lower support members bent in an arch shape are installed at the bottom of an arch-shaped tunnel section formed by joining a plurality of corrugated steel plate segments, so that the lower support members distribute the upper load applied to the corrugated steel plate to the foundation concrete, thereby enabling stable support of the arch-shaped tunnel section, and thus enabling the formation of a structurally stable structure using a corrugated steel plate of a relatively thin thickness.

In general, corrugated steel plates are formed to have a thin thickness but a corrugated cross-section with repeated, continuous peaks and valleys, so that they can exhibit significantly improved rigidity compared to general steel plates. Corrugated steel plate structures formed by combining multiple corrugated steel plates are superior in constructability compared to concrete structures, which can shorten the construction period. In addition, they are environmentally friendly and have excellent economic efficiency, so they are widely used in the construction of various structures such as bridges, passageways, waterways, utility tunnels, and tunnels.

Since these corrugated steel plate structures are basically structures completed by interconnecting corrugated steel plate segments, they can form corrugated steel plate structures of various sizes and shapes depending on the shape or combination of the corrugated steel plate segments. From the most basic cross-section, which is a circular cross-section, to the Pipe-Arch type with improved water permeability, as well as the oval, Underpass, Arch, High-Profile Arch, Low-Profile Arch, Pear, Pear Arch, and Box-Culvert types, various cross-sections of corrugated steel plate structures are being constructed according to the purpose and site conditions.

As illustrated in Fig. 1a, a conventional corrugated steel plate structure can be formed by pouring reinforced concrete in a lengthwise direction of the structure to form a pair of foundation concrete sections (1), installing an arch wall section (2) made of corrugated steel plates on top of each of the foundation concrete sections (1), and installing an arch roof section (3) made of corrugated steel plates to connect the upper ends of the arch wall sections (2) to each other.

Corrugated steel plate structures of this type have a problem in that the deformation caused by the load acting on the arch roof body (3) due to soil pressure, etc., is concentrated on both sides of the upper part of the arch wall body (2), resulting in excessive stress and excessive deformation. In other words, although excessive stress and excessive deformation occur in the part where the arch wall body (2) and the arch roof body (3) meet, since the corrugated steel plate is configured with the same stiffness as a whole and thus does not secure resistance capacity, there is a problem with safety, and there is a problem in that the corrugated steel plate structure may collapse.

In particular, the collapse of corrugated steel plate structures can be further accelerated by local buckling caused by stress imbalance during construction and by repeated live loads and soil compaction errors.

Considering the problems of the conventional corrugated steel plate structure as described above, a prior art document related to a corrugated steel plate structure with reinforced rigidity is proposed, Korean Patent No. 10-1167183 (registered on July 13, 2012, hereinafter referred to as “prior art document”). As illustrated in Fig. 1b, the corrugated steel plate structure according to the prior art document is composed of an arch corrugated steel plate (4) having one lower portion joined to the upper portion of one base portion (5a), the other lower portion of the arch corrugated steel plate (4) having one upper portion joined to the upper portion of the other base portion (5b), and a separate reinforcing arch member (6) installed on the outside of the arch corrugated steel plate (4).

The corrugated steel plate structure of the above prior art document can secure sufficient resistance capacity by increasing structural rigidity by preventing the deformation due to the load of the arch corrugated loop body (4b) from being concentrated on the upper sides of both sides of the arch corrugated wall body (4a) by the reinforcing arch member (6), thereby improving the safety of the corrugated steel plate structure.

However, in the corrugated steel plate structure of the prior art document, since the reinforcing arch member (6) is placed on the outside of the arch corrugated steel plate (4) and fixed to the arch corrugated steel plate (4) by a fixing bracket (7), a significant portion of the earth pressure is not effectively distributed and acts directly on the arch corrugated steel plate (4). Therefore, in order to prevent deformation or damage of the arch corrugated steel plate due to the earth pressure, it was inevitable to use a steel plate having sufficient thickness to construct the arch corrugated steel plate (4).

Ultimately, the corrugated steel plate structure of the prior art document has the problem of reduced economic feasibility due to the thick corrugated steel plate segment forming the arch corrugated steel plate, and reduced workability due to difficulty in transporting and handling due to the weight.

Korean Patent No. 10-1167183 (registered on July 13, 2012)

The present invention has been made to solve the above problems, and an object of the present invention is to provide a corrugated steel plate structure that is structurally stable and allows the use of corrugated steel plates of relatively thin thickness, by functionally separating the corrugated steel plate and the lower support member so that the corrugated steel plate performs a structural function of supporting an upper load applied to the corrugated steel plate and distributing it to a foundation concrete portion, and the corrugated steel plate performs a non-structural function of preventing soil and seepage water from flowing into the interior of the corrugated steel plate structure.

Another object of the present invention is to provide a corrugated steel plate structure in which adjacent lower support members are connected to each other by crossbeams to form a stable load transmission structure despite the spacing of the lower support members, thereby ensuring constructability and stability.

Another object of the present invention is to provide a corrugated steel plate structure in which a plurality of crossbeams connecting adjacent lower support members are connected to each other by wires to form a stable reinforcing structure regardless of the spacing between the crossbeams, thereby ensuring constructability and stability.

Another object of the present invention is to provide a corrugated steel plate structure having a synthetic reinforcing member formed in an outer rib located between adjacent lower support members, thereby ensuring constructability and stability while reducing the number of arch support members and stably supporting an arch-shaped tunnel section.

The present invention, which achieves the above-described purpose and performs the task of eliminating the problems of the prior art, relates to a corrugated steel plate structure having secured constructability and stability, in which an arch-shaped tunnel section (20) is formed by combining a plurality of corrugated steel plate segments (21) having a plurality of peaks and valleys and bent at a predetermined curvature, and both left and right ends of the arch-shaped tunnel section (20) are fixed to a foundation concrete section (10) formed on the ground, and comprises a plurality of lower support members (30) that are bent in an arch shape so as to extend along the arch-shaped tunnel section (20), are installed in an inner valley section (20a) of the arch-shaped tunnel section (20) so as to support the arch-shaped tunnel section (20) from the inside, and are installed so as to be spaced apart from each other along the longitudinal direction (D1) of the arch-shaped tunnel section (20); And it is characterized by including a fixing bracket (40) installed spaced apart along the arch direction (D2) of the lower support member (30) to fix the arch-shaped tunnel portion (20) to the lower support member (30).

In addition, it may further include a plurality of cross beams (60) that extend along the longitudinal direction (D1) of the arch-shaped tunnel section (20) and connect adjacent lower support members (30) to each other and are spaced apart along the arch direction (D2) of the lower support members (30).

In addition, a pair of sockets (43) are formed in the above-mentioned fixed bracket (40), so that both ends of the crossbeam (60) can be inserted into and fixed to adjacent sockets (43).

In addition, the crossbeam (60) is divided into a large diameter portion (61) and a small diameter portion (62), and one end of the small diameter portion (62) can be inserted into the large diameter portion (61) and connected to each other.

In addition, the crossbeam (60) may be bent into a shape corresponding to the inner groove (20a) of the arch-shaped tunnel portion (20) to form a reinforcing bent portion (65) that additionally supports the arch-shaped tunnel portion (20).

Additionally, adjacent crossbeams (60) along the arch direction (D2) can be connected to each other via a wire (70).

And, it is preferable to connect the crossbeams (60) in an X shape via a second support (72) installed on the inside of the arch-shaped tunnel section (20) so that a pair of wires (70) connect the two ends of adjacent crossbeams (60) to each other, and the pair of wires (70) are positioned in the center between the adjacent crossbeams (60).

According to the corrugated steel plate structure of the present invention, in which the constructability and stability are ensured, the upper load acting on the arch-shaped tunnel section due to soil, etc. is transmitted and distributed to the foundation concrete section through the lower support member, so that the lower support member performs the structural function of supporting the upper load, and the corrugated steel plate forming the arch-shaped tunnel section performs a non-structural function such as preventing soil, sand, and seepage water from flowing into the interior of the structure, thereby functionally separating the corrugated steel plate and the lower support member, thereby further improving the structural stability of the corrugated steel plate structure.

In particular, corrugated steel plates, which are intended to prevent the internal inflow of soil and seepage water, can be formed with a relatively thin thickness, and thus, economic efficiency and constructability can be secured through weight reduction of the corrugated steel plates.

Furthermore, by connecting adjacent lower support members to each other by crossbeams to form a stable load transfer structure, deformation and buckling of the lower support members can be effectively suppressed, thereby ensuring improved structural stability.

In addition, since the crossbeam can be fixed to the arch-shaped tunnel section together with the lower support member by using a fixing bracket that fixes the lower support member to the arch-shaped tunnel section, no additional work is required for installing the crossbeam, thereby improving constructability.

In addition, since a plurality of crossbeams arranged between adjacent lower support members are connected to each other by wires, a structure is formed in which the lower support members, crossbeams, and wires are organically connected to each other, it is possible to secure a certain distance between the lower support members or the crossbeams to promote economy and constructability, and further improve the structural stability of the structure.

Figure 1a is a perspective view of a conventional corrugated steel plate structure;
Figure 1b is a perspective view of a corrugated steel plate structure according to prior art literature.
Figure 2a is a perspective view of a corrugated steel plate structure according to one embodiment of the present invention;
Figure 2b is a bottom perspective view of a corrugated steel plate structure according to one embodiment of the present invention;
Figure 3 is a cross-sectional view showing the joint structure of the arch-shaped tunnel portion, the lower support member, and the crossbeam according to one embodiment of the present invention.
Figure 4a is a perspective view showing a connection structure between unit pipes forming a lower support member according to one embodiment of the present invention.
Figure 4b is an exemplary diagram showing a connection structure between unit pipes forming a lower support member according to one embodiment of the present invention.
Figure 5a is an example diagram showing the structure of a gaboro consisting of a large diameter part and a small diameter part that are screw-connected to each other.
Figure 5b is an example diagram showing the structure of a crossbeam consisting of a large diameter part and a small diameter part joined by fastening bolts and nuts.
Figure 6a is an example diagram showing the structure of a crossbeam with a reinforcing bend formed.
Figure 6b is a cross-sectional view showing a state in which a synthetic reinforcing part is formed on the outer bone portion of an arch-shaped tunnel portion according to one embodiment of the present invention.
Figure 7a is a bottom perspective view showing a state in which a crossbeam is connected by a wire according to one embodiment of the present invention;
Figure 7b is a bottom view showing a state in which a crossbeam is connected by a wire according to one embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail based on matters illustrated in the drawings. However, if it is determined that a specific description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

As illustrated in FIGS. 2a and 2b, a corrugated steel plate structure having constructability and stability according to an embodiment of the present invention includes a foundation concrete portion (10), an arch-shaped tunnel portion (20), a lower support member (30), and a fixing bracket (40), and the left and right ends of the arch-shaped tunnel portion (20) are fixed to the foundation concrete portion (10), and the lower support member (30) is fixed to the inside of the arch-shaped tunnel portion (20) by a fixing bracket (40), so that the upper load of the arch-shaped tunnel portion (20) is transmitted to the foundation concrete portion (10) through the lower support member (30). This is a major technical difference.

The above foundation concrete portion (10) supports the arch-shaped tunnel portion (20) and the lower support member (30), and is formed so that a pair of foundation concrete portions (10) are spaced apart from each other and extend in the longitudinal direction (D1) of the corrugated steel plate structure so that the left and right ends of the arch-shaped tunnel portion (20) can be fixed respectively.

This foundation concrete part (10) can be formed by a field casting method in which formwork and reinforcing bars are installed on site and concrete is poured, or by a precast method in which precast blocks manufactured in advance at a factory are transported to the site and installed.

Meanwhile, a groove (11) extending in the longitudinal direction (D1) is formed at the upper end of the foundation concrete portion (10), and a guide channel (12) having an open upper portion is installed in the groove (11), and an arch-shaped tunnel portion (20) and an end of a lower support member (30) that are mounted on the guide channel (12) can be fixed to the foundation concrete portion (10) by anchor bolts (not shown). To this end, a plurality of holes through which anchor bolts protruding from the foundation concrete portion (10) penetrate can be formed in the guide channel (12).

As illustrated in FIGS. 2A and 3, the arch-shaped tunnel section (20) is formed by combining a plurality of corrugated steel plate segments (21) to form a tunnel structure, and the plurality of corrugated steel plate segments (21) are combined to extend in the longitudinal direction (D1) and the arch direction (D2) of the corrugated steel plate structure. At this time, each corrugated steel plate segment (21) has a cross-section of a wave shape in which a plurality of peaks and valleys are repeatedly continuous, and is formed to be bent at a predetermined curvature so as to extend in the arch direction (D2), and adjacent corrugated steel plate segments (21) can be combined and fixed to each other by fastening with bolts and nuts in a state in which some of them overlap.

Such an arch-shaped tunnel section (20) can be fixed by anchor bolts with both left and right ends secured to the grooves (11) of the foundation concrete section (10), and a pair of foundation concrete sections (10) are connected by the arch-shaped tunnel section (20) to complete the arch-shaped tunnel structure.

As shown in FIGS. 2b and 3, the lower support member (30) supports the arch-shaped tunnel section (20) from the inside, and is installed along the inner groove (20a) of the arch-shaped tunnel section (20) so as to extend from one side of the foundation concrete section (10) along the arch direction (D2) to the other side of the foundation concrete section (10), and a plurality of lower support members (30) are selectively installed in the inner groove (20a) so as to be spaced apart along the longitudinal direction (D1) of the arch-shaped tunnel section (20) with the above structure.

As shown in FIG. 2b, FIG. 4a and FIG. 4b, the lower support member (30) can be formed using a hollow pipe, and preferably, a plurality of unit pipes (31) bent in the arch direction (D2) can be formed by being continuously joined along the arch direction (D2), and adjacent unit pipes (31) can be joined via a fastener (50).

The above fastener (50) is provided on both sides with a cylindrical insertion portion (51) that is inserted into the end of the unit pipe (31), and a pair of fastening grooves (52) bent in an L shape are formed in each insertion portion (51) to form a point-symmetrical structure based on the center of the insertion portion (51). A fastening rod (32) corresponding to the fastening grooves (52) may be provided at the end of the unit pipe (31), and the fastening rod (32) may be inserted into the fastening groove (52) by the movement of the unit pipe (31) in the arch direction (D2) and may be seated in the fastening groove (52) and fastened by the rotation of the unit pipe (31). At this time, the fastening rod (32) may be formed as a bolt that penetrates the end of the unit pipe (31) and is fastened with a nut.

According to the fastener (50) as described above, when forming a lower support member (30) by combining a plurality of unit pipes (31) in the field, no separate fastening work is required, so that quick and efficient work progress is possible, and since the unit pipes (31) and the fastener (50) can have an accurately specified relative rotation amount for hooking, when continuously connecting unit pipes (31) having a predetermined curvature, a lower support member (30) that smoothly extends in the arch direction (D2) without distortion can be formed.

Meanwhile, a first magnet (53) may be provided at the innermost part of the fastening groove (52), and a second magnet (54) that forms an attractive force together with the first magnet (53) may be provided at the fastening rod (32), so that the fastening rod (32) may be additionally fastened to the fastening groove (52) by the magnetic force of the first and second magnets (53, 54). At this time, the first magnet (53) may have a semi-cylindrical shape and may be provided in a form that is in close contact with the innermost part of the fastening groove (52), and the second magnet (54) may have a cylindrical shape that surrounds the fastening rod (32).

In addition, only one of the first magnet (53) or the second magnet (54) may be manufactured as a magnet, and the other may be manufactured as a magnetic material. It is also possible to omit the second magnet (54) and manufacture the fastening rod (32) as a magnetic material, so that the inner surface of the first magnet (53) is manufactured in a shape corresponding to the diameter of the fastening rod (32).

According to the first and second magnets (53, 54) as described above, the fastening rod (32) is guided to the correct position inside the fastening groove (52) by the magnetic force formed between the first and second magnets (53, 54) during the process of being inserted into the fastening groove (52), and is further fastened inside the fastening groove (52) by the magnetic force in a settled state, thereby strengthening the fastening force of the unit pipe (31) and the fastening member (50).

At this time, the additional fastening by the magnetic force applied between the fastening rod (32) and the fastening groove (52) functions to accurately specify the relative rotation amount of the unit pipe (31) and the fastening member (50), so that it is possible to provide a lower support member (30) that smoothly extends in the arch direction (D2) without distortion while continuously fastening the unit pipe (31) having a predetermined curvature by relative movement.

Meanwhile, when the fastening of the unit pipe (31) is completed and the lower support member (30) is formed, it is preferable to inject a filler into the interior of the lower support member (30) to form a composite structure. To this end, it is preferable that a filler injection hole be formed in each unit pipe (31) or some unit pipes (31). However, since the unit pipe (31) located at the top is less affected by gravity, an injection hole must be formed.

As shown in FIGS. 2b and 3, the fixing bracket (40) is installed to fix the lower support member (30) to the arch-shaped tunnel portion (20), and a plurality of fixing brackets (40) are installed at positions spaced apart along the arch direction (D2) to fix the lower support member (30) to the arch-shaped tunnel portion (20).

The above-mentioned fixed bracket (40) includes a main body (41) that is in close contact with the lower support member (30) in a form that wraps around a part of the lower support member (30), and a fixed piece (42) that is integrally formed at both left and right ends of the main body (41) and is fixed to the arch-shaped tunnel part (20) by bolt fastening, and can be installed to fix the lower support member (30) to the arch-shaped tunnel part (20).

In addition, the lower support members (30) adjacent in the longitudinal direction (D1) can be connected to each other by a plurality of crossbeams (60). The crossbeams (60) are installed to extend along the longitudinal direction (D1) of the arch-shaped tunnel portion (20) between the adjacent lower support members (30) so as to connect the adjacent lower support members (30) to each other, and the plurality of crossbeams (60) are spaced apart along the arch direction (D2) so as to connect the adjacent lower support members (30) at different positions.

In this way, the crossbeam (60) connecting the adjacent lower support members (30) can be fixed to the arch-shaped tunnel section (20) by a fixing bracket (40) so as to be in contact with the lower support member (30), thereby ensuring convenience in the installation work of the crossbeam (60).

More specifically, the fixed bracket (40) may be formed with a pair of sockets (43) into which the ends of the crossbeams (60) are inserted, and the pair of sockets (43) protrude in different directions symmetrically with respect to the center of the fixed bracket (40). For example, when one of the pair of sockets (43) protrudes forward of the fixed bracket (40), the remaining socket (43) is formed to protrude backward of the fixed bracket (40).

As shown in Fig. 5a, the crossbeam (60) is divided into a large diameter portion (61) and a small diameter portion (62) for ease of installation, and one end of the small diameter portion (62) can be inserted into and joined to the large diameter portion (61).

That is, in the crossbeam (60) according to another embodiment of the present invention, a first screw portion (63) formed of a female screw is formed at one end of a large-diameter portion (61), and a second screw portion (64) formed of a male screw is formed at one end of a small-diameter portion (62), so that one end of the small-diameter portion (62) can be inserted into the large-diameter portion (61) and connected to the large-diameter portion (61) by screwing together the first and second screw portions (63, 64). According to this structure, the crossbeam (60) can be installed by inserting one end of the crossbeam (60) into the socket (43) of one side fixing bracket (40) while the crossbeam (60) is contracted by adjusting the length of the crossbeam (60), and then extending the crossbeam (60) so that the other end of the crossbeam (60) is inserted into the socket (43) of the opposite fixing bracket (40).

As shown in FIG. 5b, a crossbeam (60) according to another embodiment of the present invention can be fixed by being connected to a large-diameter portion (61) by a bolt (B) that penetrates the large-diameter portion (61) and the small-diameter portion (62) and is fastened to a nut (N) while one end of the small-diameter portion (62) is inserted into the large-diameter portion (61). In this case, the expansion and contraction of the crossbeam (60) can be adjusted, so that easy installation of the crossbeam (60) is possible.

As illustrated in Fig. 6a, a reinforcing bend (65) for additionally supporting the arch-shaped tunnel portion (20) may be formed in the crossbeam (60). The reinforcing bend (65) may be formed by bending the central portion of the crossbeam (60) into a shape corresponding to the inner groove (20a) of the arch-shaped tunnel portion (20) so that the central portion of the crossbeam (60) is in close contact with the inner groove (20a) of the arch-shaped tunnel portion (20). According to the crossbeam (60) including such a reinforcing bend (65), by utilizing the crossbeam (60) connecting adjacent lower support members (30), the arch-shaped tunnel portion (20) can be supported with a wider contact surface without a gap due to the groove, thereby further improving the structural stability of the corrugated steel plate structure.

As illustrated in Fig. 6b, a composite reinforcing member (80) may be provided between adjacent lower support members (30). At this time, the composite reinforcing member (80) is composed of a steel structure (81) and reinforced concrete (82), and may be selectively positioned on the outer groove (20b) of the arch-shaped tunnel section (20), but may be fixed into a sturdy structure by the reinforcing bend (65) of the crossbeam (60). To this end, a reinforcing bend (65) may be formed on the crossbeam (60) to be inserted into and closely fitted into the inner groove (20a), and the organic combination of the composite reinforcing member (80) and the crossbeam (60) increases the gap between the lower support members (30), thereby reducing the number of lower support members (30) used, while enabling stable support of the arch-shaped tunnel section (20). At this time, the reinforcing bending portion (65) may be formed as a pair in one crossbeam (60) and inserted into each of the two adjacent inner ribs (20a) to support the load.

The above-mentioned reinforcing bar structure (811) includes main reinforcing bars (813) arranged in the arch direction (D2) and a plurality of fixed reinforcing bars (811) and supporting reinforcing bars (812) for fixing the main reinforcing bars (813). At this time, the plurality of fixed reinforcing bars (811) can be fixed by penetrating or welding to multiple locations of the outer rib (20b), and depending on the embodiment, can be fixed to penetrate multiple locations of the lower crossbeam (60).

A plurality of main reinforcing bars (813) are installed so as to be connected to two or more fixed reinforcing bars (811) at different locations by means of reinforcement bars (812) that extend in the arch direction (D2) and are arranged in the longitudinal direction (D1), and the fixed reinforcing bars (811) and reinforcement bars (812) can be tied to each other by being tied with wire.

Such a steel structure (81) can be formed into a structure extending along the arch direction (D2).

The above-mentioned reinforced concrete (82) is formed by pouring concrete around the steel structure (81), and can be formed by pouring and curing concrete inside a formwork (83) installed on the outside of the arch-shaped tunnel section (20) so as to accommodate the steel structure (81) inside and extend in the arch direction (D2).

Meanwhile, the formwork (83) can be fixed to the outer ridge (20c) of the arch-shaped tunnel section (20) by a bolt (84), and the bolt (84) penetrates the outer ridge (20c) of the arch-shaped tunnel section (20) and is fastened to the reinforcing bend (65), thereby fixing the formwork (83) to a more solid structure, and since the upper load of the arch-shaped tunnel section (20) is distributed to the lower support member (30) through the reinforcing bend (65) of the crossbeam (60), the stability of the corrugated steel plate structure can be further improved.

In such a formwork (83), one or more injection holes (831) for injection of concrete are formed, and the formwork (83) can be removed after curing of the reinforced concrete (82) is completed, or can be maintained as is to form a reinforcement structure together with the reinforced concrete (82).

As shown in FIGS. 7a and 7b, a plurality of crossbeams (60) that are spaced apart in the arch direction (D2) between adjacent lower support members (30) and connect the lower support members (30) to each other can be connected to each other by wires (70).

More specifically, the crossbeams (60) adjacent in the arch direction (D2) are connected at both ends by a pair of wires (70), and for this purpose, first supports (71) for installing the wires (70) are respectively provided at both ends of the crossbeams (60). At this time, the first support (71) may be formed by integrally forming a support ring (712) at the outer end of a fixing rod (711) that is installed to be fixed to the crossbeam (60), and the wire (70) may pass through the support ring (712) and pass through the first support (71) or be fixed to the support ring (172) and then be fixed to the first support (71).

In addition, a second support (72) may be included to support a pair of wires (70) so that the pair of wires (70) can connect the ends of adjacent crossbeams (60) in an X shape, and the second support (72) is composed of a fixing rod and a support ring like the first support (71), but is installed on the inside of the arch-shaped tunnel portion (20) so as to be located in the center between the adjacent crossbeams (60) in the arch direction (D2), and a pair of wires (70) extending from the first support (71) installed at both ends of one crossbeam (60) extend to the first support (71) installed at both ends of the other crossbeam (60) via the second support (72).

Meanwhile, a pair of wires (70) connecting both ends of adjacent crossbeams (60) may or may not intersect each other. For example, a wire (70) extending from a first support (71) installed at a left end of one crossbeam (60) may extend to a first support (71) installed at a right end of the other crossbeam (60) via a second support (72), and in this case, the pair of wires (70) intersect each other and form an X-shape. On the other hand, if a wire (70) extending from a first support (71) installed at a left end of one crossbeam (60) extends to a first support (71) installed at a left end of the other crossbeam (60) via a second support (72), the pair of wires (70) do not intersect each other and form an X-shape.

As described above, a pair of wires (70) that form an X shape and connect both ends of the crossbeams (60) has the advantage of being able to effectively restrain both the longitudinal (D1) and arch direction (D2) behavior of the crossbeams (60). That is, when a pair of wires (70) extend in a direction parallel to the arch direction (D2) and connect both ends of adjacent crossbeams (60), the wires (70) connected to the crossbeams (60) are orthogonal to the longitudinal direction (D1), making it difficult to effectively restrain the longitudinal direction (D1) behavior of the crossbeams (60), whereas when a pair of wires (70) pass through a second support (72), each wire (70) extends diagonally and is connected to the crossbeams (60), so that not only the arch direction (D2) movement of the crossbeams (60) but also the longitudinal direction (D1) behavior can be effectively restrained.

In addition, since stable load distribution is realized, the longitudinal (D1) spacing between the lower support members (30) or the arch direction (D2) spacing of the crossbeam (60) can be secured to a certain level or more, thereby promoting economy and constructability.

As described above, the corrugated steel plate structure of the present invention, which has secured constructability and stability, is formed by a plurality of lower support members (30) being arranged at the bottom of an arch-shaped tunnel section (20) formed by joining a plurality of corrugated steel plate segments (21) in the longitudinal direction (D1) and the arch direction (D2), thereby forming a reinforcing structure that supports the arch-shaped tunnel section (20), thereby not only enabling effective reinforcing of the arch-shaped tunnel section (20), but also enabling the construction of the arch-shaped tunnel section (20) using corrugated steel plate segments (21) having a relatively thin thickness, thereby ensuring constructability and stability.

It will be understood by those skilled in the art that the corrugated steel plate structure having the constructability and stability secured according to the present invention described above can be implemented in other specific forms without changing the technical idea or essential features of the present invention.

Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive, and the scope of the present invention is indicated by the claims described below rather than the detailed description described above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention.

10: Foundation concrete section 20: Arch-shaped tunnel section
20a: Inner groove 21: Corrugated steel plate segment
30: Lower support member 40: Fixed bracket
60: Crossbeam 43: Socket
61: Large intestine 62: Small intestine
65: Reinforcement bend 70: Wire
71: First support zone 72: Second support zone

Claims (7)

The present invention relates to a corrugated steel plate structure formed by fixing the left and right ends of an arch-shaped tunnel section (20) formed by combining a plurality of corrugated steel plate segments (21) having a plurality of peaks and valleys and bent at a predetermined curvature to a foundation concrete section (10) formed on the ground.
A plurality of lower support members (30) that are bent in an arch shape to extend along the arch-shaped tunnel section (20), are installed in the inner groove (20a) of the arch-shaped tunnel section (20) to support the arch-shaped tunnel section (20) from the inside, and are installed to be spaced apart from each other along the longitudinal direction (D1) of the arch-shaped tunnel section (20); and
A fixing bracket (40) installed spaced apart along the arch direction (D2) of the lower support member (30) to fix the above arch-shaped tunnel portion (20) to the lower support member (30);
Including, but extending along the longitudinal direction (D1) of the arch-shaped tunnel section (20) and connecting adjacent lower support members (30) to each other, and including a plurality of cross beams (60) spaced apart along the arch direction (D2) of the lower support members (30);
A corrugated steel plate structure with improved constructability and stability, characterized in that a pair of sockets (43) are formed in the above-mentioned fixed bracket (40), and both ends of the crossbeam (60) are inserted into and fixed to adjacent sockets (43).
delete delete In the first paragraph,
A corrugated steel plate structure with improved constructability and stability, characterized in that the above crossbeam (60) is divided into a large diameter portion (61) and a small diameter portion (62), and one end of the small diameter portion (62) is inserted into the large diameter portion (61) and mutually connected.
In the first paragraph,
A corrugated steel plate structure with improved constructability and stability, characterized in that the crossbeam (60) is bent into a shape corresponding to the inner groove (20a) of the arch-shaped tunnel section (20) to form a reinforcing bent section (65) that additionally supports the arch-shaped tunnel section (20).
In the first paragraph,
A corrugated steel plate structure with improved constructability and stability, characterized in that adjacent crossbeams (60) along the arch direction (D2) are connected to each other via wires (70).
In paragraph 6,
A corrugated steel plate structure with improved constructability and stability, characterized in that a pair of wires (70) connect the two ends of adjacent crossbeams (60) to each other, and the pair of wires (70) are positioned in the center between the adjacent crossbeams (60) by passing through a second support (72) installed on the inside of an arch-shaped tunnel section (20) to connect the crossbeams (60) in an X shape.