KR20060102622A - Arch-type underground structure system and construction method using frp panel - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to an arched underground structure system using a composite panel and a construction method using the same.

2. The technical problem to be solved by the invention

The present invention is to use a composite panel that is lightweight, excellent rigidity, formability and corrosion resistance for the arched underground structure, to improve the structural performance, construction performance, and maintenance performance of the underground structure It is an object of the present invention to provide an arched underground structure system and a construction method using the same.

3. Summary of Solution to Invention

Arch-type underground structure system using a composite panel according to the present invention, which is placed or assembled at both ends of the foundation ground, retaining wall foundation formed with a groove on the top; Inserted and fixed in the groove portion of the retaining wall foundation is connected in sequence to the arch shape of the underground structure, take the waveform of the right angle or trapezoidal valleys and mountains in the width direction, and in the longitudinal direction according to the arch shape of the underground structure Characterized in that the composite panel is produced in a curved shape with a constant curvature.

In addition, the arch structure construction method using the composite panel according to the present invention, the first step of uniformly crushing after breaking the ground to be constructed; A second step of placing or assembling the retaining wall foundation such that upper grooves are formed at both ends of the foundation ground where the compacting is completed; A third step of, when the construction of the retaining wall foundation is completed, temporarily fixing one end portion in the width direction of the composite panel in the groove portion of the retaining wall foundation, and then filling the groove portion with non-contraction concrete; A fourth step of sequentially assembling the remaining composite panel according to the curvature of the underground structure; A fifth step of filling high quality earth and sand on the outer surface of the assembled composite panel; And a sixth step of finishing the end of the underground structure.

4. Important uses of the invention

It is used to build small underground structures (small bridges, underground passages, drainage channels) using composite panels.

Underground structure, composite panel, corrugated steel sheet, FRP

Description

Arch-type underground structure system using composite panel and construction method using same {Arch-type underground structure system and construction method using FRP panel}

1 is a longitudinal sectional view showing an arcuate underground structure according to the present invention.

2 to 3 are perspective views showing various shapes of the composite panel according to the present invention.

4 to 5 is a perspective view showing a widthwise connection method of a composite panel according to an embodiment of the present invention.

Figure 6 is a perspective view showing a longitudinal connection method of the composite panel according to an embodiment of the present invention.

Figure 7 is a connection detail using the chord of the composite panel according to an embodiment of the present invention.

8 is a perspective view showing a method of installing a composite panel according to the present invention on a retaining wall foundation.

* Explanation of symbols for the main parts of the drawings

1: arched underground structure 10: retaining wall foundation

11: groove portion 12: non-contraction concrete

20: composite panel 21, 22: bone and acid

23: reinforcement plate 24: epoxy

25: bar 26: connection surface

27: convex portion 28: concave portion

The present invention relates to an arched underground structure system using a composite panel and a construction method using the same.

Reinforced concrete structures have been mainly applied to underground structures such as connecting passages, waterways and solid intersections, which are divided by new roads. However, these reinforced concrete underground structures have limitations in application area as their own weight is the dominant structure, and when the underground structures are wide, it is difficult to handle construction joints, and when the ground conditions are weak, structural problems due to uneven settlement There was a prone problem.

In addition, in terms of workability, due to the multi-stage composite construction of site casting, it is difficult to control air delay and uniform quality, and installation of copper bar during construction is inevitable for long-term traffic control or detour construction, and in the case of precast products, joint treatment And there was a problem that the transportation of the precast product is difficult.

In addition, in terms of maintenance, cracks may occur during construction and public use, resulting in poor aesthetics and long-term deterioration. Subsequent expansion of the underground structure may result in complex structural details and construction, and defects in expansion joints. In addition, the construction joint and the precast connection portion, such as leaking problems occur, in the case of the box form there was a problem that the structural problems due to long-term uneven settlement is likely to occur.

Due to the above problems, the corrugated steel underground structure has recently been introduced to exhibit advantages such as air shortening and maintenance cost reduction compared to the concrete structure.

Corrugated steel plate underground structure is a circular or arched structure in which corrugation is formed on a galvanized steel plate and the entire corrugated steel plate is bolted and backfilled on site. Such corrugated steel underground structures have a thickness of about 1/20 to 1/40 and a weight of about 1/15 to 1/30 compared to conventional reinforced concrete culverts because the corrugated steel interacts with the backfill material (synthetic behavior). Since the same load capacity can be expressed, construction cases are gradually increasing.

However, although the corrugated steel underground structures also make up for the shortcomings of the existing reinforced concrete structures, they still have the following problems due to the limitations in terms of minimum toffee, construction limits, and repair performance during construction.

First, in terms of structural aspect, when the space is large, reinforcement for stiffness reinforcement is frequently installed, and when the toffee is small, fatigue problems at the steel plate connection and reinforcement connection due to the upper traffic load may occur. Therefore, if the span is large, it is necessary to improve the shape inevitably, and if the arch action effect is reduced despite the shape improvement, the flexural rigidity reinforcement is required.

Secondly, in terms of workability, careful construction is required to balance the backfill load after mounting the steel plate structure, and there are still difficulties in securing the quality of the connection part and the connection problem with the foundation, and in changing the shape of the factory manufactured steel plate structure during transportation. Special care is required.

Third, in terms of maintenance, there are problems to solve the problems of corrosion of the galvanized steel sheet, exposure to the environment harmful to the steel and fatigue of the steel.

The present invention is to solve the above problems, by using a composite panel of light weight and excellent rigidity, formability and corrosion resistance for the arched underground structure, structural performance, construction performance, and maintenance performance of the underground structure An object of the present invention is to provide an arched underground structure system using a composite panel and a construction method using the same.

In order to achieve the above object, the arched underground structure system using the composite material panel according to the present invention includes: a retaining wall foundation having a groove portion formed on the upper end of the foundation or being placed or assembled; Inserted and fixed in the groove portion of the retaining wall foundation is sequentially installed in accordance with the arch shape of the underground structure, taking the waveform of the right angle or trapezoidal valleys and mountains repeated in the width direction, in the longitudinal direction according to the arch shape of the underground structure Characterized in that the composite panel is produced in a curved shape with a constant curvature.

In addition, the arch structure construction method using the composite panel according to the present invention, the first step of uniformly crushing after breaking the ground to be constructed; A second step of placing or assembling the retaining wall foundation such that upper grooves are formed at both ends of the foundation ground where the compacting is completed; A third step of, when the construction of the retaining wall foundation is completed, temporarily fixing one end portion in the width direction of the composite panel in the groove portion of the retaining wall foundation and temporarily filling the groove portion with non-condensed concrete; A fourth step of sequentially assembling the remaining composite panel according to the curvature of the underground structure; A fifth step of filling high quality earth and sand on the outer surface of the assembled composite panel; And a sixth step of finishing the end of the underground structure.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a longitudinal cross-sectional view showing an arched underground structure according to the present invention, Figures 2 to 3 are perspective views showing various shapes of the composite panel according to the present invention, Figures 4 to 5 is one embodiment of the present invention 6 is a perspective view illustrating a widthwise connection method of a composite material panel according to an embodiment, and FIG. 6 is a perspective view illustrating a lengthwise connection method of a composite material panel according to an embodiment of the present invention, and FIG. Connection detail using the rod of the composite panel according to the example, Figure 8 is an attempt showing a method for installing the composite panel according to the present invention on the retaining wall foundation.

The arched underground structure (1) system using the composite panel according to the present invention is placed or assembled on the foundation ground, the retaining wall foundation (10) formed with a groove at the upper end and inserted into the groove portion of the retaining wall foundation (10) Consists of a composite material panel 20 that is connected in sequence according to the arch shape of the underground structure.

The composite panel 20 is made of a fiber-reinforced polymer composite material (Fiberglass Reinforced Plastics, hereinafter referred to as FRP) combining the concept of fiber reinforcement and polymer base material, the FRP is the most representative of the composite material Due to its high specific strength (strength and inelastic coefficient for unit weight and elastic modulus for unit weight) and excellent corrosion resistance and durability, the field of application is gradually spreading as a material for aviation, shipbuilding, space, automobile and leisure industries. have.

In the present invention, the composite panel 20 is applied to an arched underground structure. The arched underground structure is a structural type in which bending moment is generated the least and axial force is mainly operated among various structural types of underground structures. Since it is not required, there is no restriction in the configuration of the cross-section and it does not require a separate bending reinforcement. In addition, since the panel has a constant curvature, the panel is easy to manufacture and the connection of the manufactured panels is also easy.

2 to 3 show the various shapes of the composite panel 20 according to the present invention, using the excellent formability of the composite material can be produced in a rectangular or trapezoidal waveform that is almost impossible to manufacture in steel or concrete Has the characteristics.

Composite material panel 20 according to the present invention is to be assembled in the field by the length of the panel to be continuously manufactured in a predetermined length (about R / 10) according to the circumferential length of the arched underground structure (1), in the width direction Is formed in a waveform in which the valleys 21 and the peaks 22 of a right angle or trapezoid shape are repeated, and have a shape curved in a longitudinal direction in a longitudinal direction according to the arch shape of the underground structure.

Such a shape is a cross-sectional shape that can be sufficiently used even when curvature is not constant or a bending moment occurs in the cross section, so that flexural rigidity is required.The thickness and waveform size of the cross section can be arbitrarily adjusted according to the required flexural stiffness. Can be produced.

At this time, the cross-sectional shape in the width direction of the composite panel 20 has a shape in which one end is finished with a valley 21 and the other end is finished with a peak 22 according to the connection method of the composite panel (see Fig. 2). Or both ends are bent to a certain height from the middle of the valley 21 or the hill 22 to the top and finished (see FIG. 3).

4 to 5 show a method of connecting the composite panel 20 in the longitudinal direction of the underground structure (width connection method of the composite panel), the connection in the longitudinal direction of the underground structure is the transmission of force In connection with this almost no connection, it is connected by the epoxy 24 bonding method (refer FIG. 4), the coupling method by the wedge 25 (refer FIG. 5), etc.

6 shows a method of connecting the composite panel 20 along the circumferential direction of the underground structure (the longitudinal connection method of the composite material panel), and the connection method is sufficient to provide the axial force transmitted in the circumferential direction. Butt joints are connected in a negative manner by epoxy bonding. At this time, in the butt joint method, the bend angle of the two panels is the same as the curvature in the longitudinal direction of the composite material panel 20 is constant, so that there is no need for a separate joint device. However, in order to enhance the joint performance, it is preferable to add a separate reinforcement plate 23 to the valleys 21 and the peaks 22 of the composite panel to enlarge the joint cross section as shown in the drawing.

The connecting method by using the rod is a method of fitting the rod 25 to the adjacent connection surface 26 after adjoining the composite material panel of the shape shown in Figure 3, by the epoxy bonding method of FIG. It is used when some stretching is required rather than complete bonding.

At this time, in order to enhance the fastening effect of the rod 25, a convex portion 27 is formed on the other side of the connecting surface 26 of the composite panel as shown in Figure 7, the inside of the rod 25 to be fastened By forming the concave portion 28 corresponding to the convex portion 27 on the side surface, after the fastening 25 is fastened to the connecting surface 26 of the composite panel, the fastening 25 is not easily detached. It is desirable to.

In addition, it will be apparent to those skilled in the art to which the conventional bolt nut fastening method may be used as a method of connecting the composite panel.

Hereinafter, an arch-type underground structure construction method using a composite material panel according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

After destroying the ground on which the underground structure will be constructed according to the excavation regulations of the standard of road construction standard, it is uniformly made by using high quality basic materials such as sand or sandy soil according to the ground condition.

When the foundation ground compaction is completed, the retaining wall foundation 10 is placed or assembled on the foundation ground, and when the casting or manufacturing, the retaining wall foundation 10 is pre-installed with a formwork or styrofoam in the longitudinal direction to the retaining wall. The groove 11 is formed at the upper end of the base 10.

When the construction of the retaining wall foundation 10 is completed, the composite panel 20 is connected to the groove 11 of the retaining wall foundation so as to insert one end portion in the width direction of the composite panel in the width direction, and then into the groove 11. The non-condensed concrete 12 is filled and fixed. (See FIG. 8) In this case, the longitudinal connection method of the composite panel 20 is an epoxy bonding method (see FIG. 4), and a connecting method by a chock (see FIG. 5). , Or bolt nut fastening method (not shown).

When the composite panel 20 is fixed to the retaining wall foundation 10, the remaining composite panel 10 is sequentially assembled and assembled according to the curvature of the underground structure, and when the assembly is completed, the outer surface of the composite panel 20 is completed. After filling with high quality earth and sand, finish the construction by finishing the end.

On the other hand, in one embodiment according to the present invention has been described for the method of on-site construction by post-assembly on the foundation ground to complete the composite material panel 20, unlike the above embodiment, the trench and the foundation ground Simultaneously with the compacting step, after pre-assembling the composite material panel 20, the construction method of moving it to a crane or the like and connecting to the retaining wall foundation 10 will also be possible, having ordinary knowledge in the art. It will be obvious to him.

According to the present invention as described above, by constructing the underground structure in a composite material panel, the composite material has the advantages of the existing structural problems of steel and concrete, which are two major structural materials (light weight and excellent rigidity and formability and Corrosion resistance) can be overcome or supplemented to a large extent.

In more detail, in terms of structure, there is no problem in securing the ground length of the underground structure due to the high rigidity of the composite material and the characteristics independent of the shape, and since the shape such as the steel section is already manufactured at the factory, no additional reinforcement or connection is necessary. However, due to the size of the member or the nature of the material, there is an advantage that the problem of connection is less than other materials.

In addition, in terms of workability, it is easy to secure and carry the quality according to the factory production, easy to connect to the field, and the rigidity is not affected by the backfill load.

In addition, in terms of maintenance, there is no influence due to corrosion, cracks, etc., and may be exposed to poor environments.

Claims (5)

In arch type underground structure system using composite panel, A retaining wall foundation formed by placing or assembling at both ends of the foundation ground and having a groove formed at an upper end thereof; Inserted and fixed in the groove portion of the retaining wall foundation is connected in sequence to the arch shape of the underground structure, take the waveform of the right angle or trapezoidal valleys and mountains in the width direction, and in the longitudinal direction according to the arch shape of the underground structure Arch type underground structure system using a composite panel, characterized in that the composite panel is produced in a curved shape with a constant curvature. The method of claim 1, The composite panel has a composite material panel characterized in that one end of the width direction is finished with a valley and the other end of the width direction is finished with a mountain, or both ends of the width direction are bent to a certain height from the middle of the valley or the mountain to the top. Arched Underground Structure System. In the construction method of arched underground structure using composite panel, A first step of uniformly compacting after breaking the ground on which the underground structure is to be constructed; A second step of placing or assembling the retaining wall foundation such that upper grooves are formed at both ends of the foundation ground where the compacting is completed; A third step of, when the construction of the retaining wall foundation is completed, temporarily fixing one end portion in the width direction of the composite panel in the groove portion of the retaining wall foundation, and then filling the groove portion with non-contraction concrete; A fourth step of sequentially assembling the remaining composite panel according to the curvature of the underground structure; A fifth step of filling high quality earth and sand on the outer surface of the assembled composite panel; And Arch construction of the underground structure using a composite panel, comprising the sixth step of finishing the end of the underground structure. In the construction method of arched underground structure using composite panel, A first step of sequentially connecting and assembling the composite panel in accordance with the curvature of the arched underground structure in parallel with the operation of digging the ground where the underground structure will be constructed and then uniformly compacting; A second step of placing or assembling the retaining wall foundation such that upper grooves are formed at both ends of the foundation ground where the compacting is completed; A third step of, when the installation of the retaining wall foundation is completed, inserting and fixing the lower end portion of the composite material panel in which the assembly is completed to the groove portion of the retaining wall foundation, and temporarily filling the groove portion with non-condensed concrete; A fourth step of filling high quality earth and sand on the outer surface of the composite panel where the installation is completed; And Arch-structured construction method using a composite panel, characterized in that it comprises a fifth step of finishing the end of the underground structure. The method according to claim 3 or 4, The longitudinal connection method of the composite panel is an arc-shaped underground structure construction method using a composite panel, characterized in that the connection by any one method of the epoxy bonding method, the rod connecting method, and the bolt nut fastening method.

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