KR200241026Y1 - Tunnel Construction Structure for using Wave Profile Type Steel Plate - Google Patents

Abstract

The present invention relates to a tunnel construction structure that is constructed in a shallow toffee area such as tunnel entry and exit, and particularly, a support for supporting formwork and formwork for constructing lining concrete after excavating a large-scale tunnel construction site. In order to solve the problems of the conventional construction method, the earth walls are installed on both sides of the tunnel construction site, and the upper half section is small-sized, and the corrugated steel sheet is assembled into the upper half section tunnel shape. By shooting shotcrete on the side, excavating the remaining lower half section and placing the shotcrete on the inner side, constructing the same condition as the excavated rock tunnel, and constructing the continuous tunnel with the steel tunnel form made once To create and install a separate tunnel form for placing lining concrete Since it is unnecessary, the construction period can be shortened and construction cost can be reduced, and the work space is secured only by the small pit excavation, so that the damage and destruction of the natural environment can be minimized, and the waveform can be restored to the natural state in a short time. Provide tunnel construction structure using steel plate.

Description

Tunnel Construction Structure for using Wave Profile Type Steel Plate}

The present invention relates to a tunnel that is constructed in a shallow toffee area such as a tunnel entrance or valley. Especially, the earth walls are installed on both sides of the tunnel construction site, and after the small-scale installation, the corrugated steel sheet is assembled in a tunnel shape. The shotcrete is shot on to create the same conditions as the excavated rock tunnel, so that a continuous tunnel can be constructed with the steel tunnel form that has been manufactured once, so that separate tunnel form production and installation work are unnecessary to cast the lining concrete. Therefore, the construction cost can be reduced while shortening the construction period, and the work space is secured only by the small-scale excavation work, so that the damage and destruction of the natural environment can be minimized, and the corrugated steel sheet can be restored to the natural state in a short time. The tunnel construction structure using the present invention.

In general, in order to excavate a tunnel, the toffee layer on the upper part of the tunnel must be thicker than a certain thickness so that the tunnel can be constructed without collapsing by the arching action.

However, as shown in FIG. 1, there is a case where the tunnel T is inevitably required to be constructed in a section in which the toffee of the entrance / exit A or the valley B of the tunnel is shallow.

This shallow toffee area cannot be arched because the ground itself is not strong. Therefore, in this case, the tunnel had no choice but to construct the tunnel by the open tunnel method as shown in FIG.

Tunnel construction method of the conventional toffee shallow area, as shown in Figure 2, the ground (1) to the ground enough to build the front surface lining concrete (3) of the tunnel, the slope of the left and right sides (2) After the opening work is carried out to a large extent so as to have a safe slope not to collapse, a formwork and a support for forming the lining concrete 3 are installed, and concrete is laid on the formwork to form the lining concrete 3, After the lining concrete 3 has been cured, the support and the formwork are dismantled, and construction has been carried out by filling the soil 4 again on the upper part of the lining concrete 3.

In the conventional tunnel construction method, a formwork for forming lining concrete is installed and installed in order to construct a tunnel at an entrance or a valley of a toffee having a shallow topographic condition, and many supports are installed to firmly support the formwork. Thereby, there was a problem that a lot of economic time is lost in the installation and dismantling work of the formwork.

In addition, due to large-scale cutting work in consideration of safety such as the stability of the excavation part and securing the working space, damage and destruction of the natural environment occurs in large units, and therefore, restoration to the natural state is difficult and economically problematic. .

Accordingly, the present invention has been made to solve the problems shown in the conventional tunnel construction method.

Therefore, the purpose of the present invention is to reduce the construction cost by reducing the construction period by using corrugated steel sheet without installing the formwork for supporting the formwork and the formwork to build the lining concrete, and through the installation of small earth oysters It is to provide a tunnel construction structure using corrugated steel sheet that minimizes the damage and destruction of the natural environment by restoring sufficient working space with earthwork only and restores it to the natural state in a short time.

In order to achieve the above object, the present invention installs the earth walls on both sides of the tunnel construction point and installs small-scale, and installs the corrugated steel sheet in the tunnel shape, and shot shotcrete inside the corrugated steel sheet assembly, such as the rock tunnel which is excavated. It creates a condition and provides a technical configuration to construct a continuous tunnel in a tunnel form made once.

1 is a view showing the topographical conditions of the section in which the tunnel is installed

Figure 2 is a cross-sectional view of the tunnel constructed by the conventional open method

3 to 8 are diagrams showing a construction example of the tunnel construction structure using a corrugated steel sheet according to the present invention step by step

<Description of Symbols for Major Parts of Drawings>

1: Ground 2: Slope

3: lining concrete 4: earth and sand

31: upper half cross-section excavation 32: shotcrete

33: lower half section excavation 34: inner lining concrete

35: Bracket 36: H steel

A: entrance and exit B: valley

p: waveform steel sheet h: H file

w: wire mesh

Hereinafter, look at in detail through the construction examples of the present invention shown in the accompanying drawings the technical configuration of the present invention.

3 to 8 show a construction example in which the tunnel construction structure using the corrugated steel sheet of the present invention is applied to the ground of the tunnel construction site.

As shown in these drawings, the present invention excavates the earth and sand of the point where the tunnel is to be constructed up to the designed upper half cross section, and is formed in the upper half cross section excavation portion 31 in the form of a cross section of a wave shape that is curved in an arc shape. Assemble and install the steel sheets (p) into the upper half-section shape of the tunnel, place shotcrete inside the corrugated steel sheet assembly, backfill the soil to the outside of the corrugated steel sheet assembly, and excavate the remaining lower half section of the tunnel construction site. In addition, the shot concrete is poured into the lower half-section excavation portion 33, and the inner lining concrete 34 construction is performed on the inner surface of the entire cross-section shot concrete portion 32, which is a basic feature in technical construction.

In carrying out the present invention of the above characteristics, as shown in Figure 3 so as to excavate only the minimum size when excavating the upper half-section at the tunnel construction point, the H pile (h) at both sides of the excavated portion It is preferable to install the earth wall using the vertical and at right angles.

The present invention does not have any problem in proceeding the tunnel construction by securing only the minimum upper half-section excavation portion 31 as described above, and the excavation of the soil layer at a right angle while forming the earth wall as described above is the excavation amount and excavation portion of the soil. The purpose is to reduce the width to minimize the destruction of the natural environment and to achieve quick restoration.

However, in carrying out the present invention, the earth wall is not necessarily provided and may be formed in a large range with a constant slope so that the left and right slopes do not collapse depending on the site situation.

After excavating the upper half end surface of the tunnel as described above, as shown in FIG. 4, the brackets 35 protruding into the excavation portion near the bottom surface of the upper half end excavation portion 31 are H piles (h) of the earth wall. ) Side by side, and fixed by mounting the H steel 36 on the bracket 35, and then supporting the lower end of the corrugated steel (p) on the top of the H steel 36, the upper half of the tunnel Assemble and install in cross-sectional shape.

At this time, the assembly of the corrugated steel sheets (p), it is advantageous to arrange the corrugated steel sheets (p) in a zigzag form to each other to increase the structural strength of the corrugated steel sheet assembly.

After completing the upper half-section corrugated steel sheet assembly as described above, shotcrete is poured on the inner surface of the corrugated steel sheet p as shown in FIG.

At this time, the wire mesh w is placed on the inner surface of the corrugated steel sheet p so that the shotcrete is attached well, and then the shotcrete is poured.

After the shotcrete portion 32 is constructed on the upper half end surface, the soil refilling is performed around the outer side of the corrugated steel sheet p as shown in FIG.

Next, as shown in FIG. 7, the remaining lower half end surface of the tunnel construction point is excavated evenly, and shotcrete is poured into the lower half end surface excavation portion 33 to complete the shotcrete portion 32 for the entire cross section.

Here, the shotcrete portion 32 may be formed only on the corrugated steel sheet assembly installed on the upper half end surface, but it is advantageous in terms of the structure to extend to the lower half end surface.

Finally, as shown in FIG. 8, the inner lining concrete 34 is constructed and finished on the inner surface of the entire cross-section shotcrete 32 to complete the tunnel construction.

According to the present invention, after installing the corrugated steel sheet assembly having the upper half section tunnel shape using the corrugated steel sheet as described above, the shotcrete surface which is poured after rock excavation is formed by forming shotcrete on the inner half of the upper half section corrugated steel sheet assembly and the lower half section. By providing the same on-site conditions, the tunnel lining concrete can be continuously installed in the tunnel form once manufactured.

According to the present invention configured as described above has the following effects.

By forming the tunnel-shaped assembly using corrugated steel sheet to create the same conditions as the rock tunnel, the construction period is greatly shortened, the construction quality is improved, and construction efficiency, economic feasibility, and stability are greatly improved.

The construction cost is greatly saved because there is no need for a separate formwork and support for placing lining concrete.

Since the cut area is greatly reduced compared to the conventional method, it is possible to minimize the damage and destruction of the natural environment and at the same time quickly restore to the natural state.

As described above, the present invention can shorten the construction period, improve construction efficiency, economic feasibility and construction quality, and minimize natural damage and destruction in the construction of tunnels in shallow toffee, It is a very useful design that allows for quick restoration.

Claims (1)

The earth and sand of the point where the tunnel is to be constructed is excavated to the designed upper half section, and the corrugated steel sheets (p) which are curved in an arc shape while being formed in the cross section of the waveform in the upper half section excavation portion 31 are in the upper half section shape of the tunnel. And install shotcrete inside the corrugated steel sheet assembly, backfill the earth and sand to the outside of the corrugated steel sheet assembly, excavate the remaining lower half end surface of the tunnel construction point, and shotcrete the lower half end excavation portion 33 The tunnel construction structure using a corrugated steel sheet, characterized in that it is constructed by performing the internal lining concrete 34 construction on the inner surface of the shotcrete section (32).