KR20050066024A - Construction method of temporary apparatus of thnnel for direct digging - Google Patents

Abstract

The present invention can shorten the air and minimize environmental damage by maintaining excavation without maintaining the shaft slope during construction of the tunnel shaft using a temporary structure, and can minimize the environmental damage, and after the tunnel formation some pressure It relates to a tunnel shaft construction method to achieve the stability of the shaft slope.

The present invention includes a structural carbon steel pipe, H-shaped steel, earth plate, wale (WALE), removable anchor is installed in the tunnel shaft portion, the structural structure using a support in the H-shaped steel After joining the carbon steel pipe by welding, close the temporary facility 20 to the excavation scheduled part and perform steel pipe multi-stage grouting on the top end part to perform excavation after reinforcement to prevent damage to the slope of the shaft part. It is possible to stabilize the slope by applying the sedimentary soil effect on the natural slope by forming the ground from the formation part of the gang gate.For the small scale collapse of the natural slope due to the vibrations during tunnel excavation, it is supported by structural carbon steel pipe and earth plate. Construction of a direct excavation tunnel shaft facility that enables the excavation of a tunnel immediately by using the temporary facility without forming a shaft slope Provide a method.

Description

CONSTRUCTION METHOD OF TEMPORARY APPARATUS OF THNNEL FOR DIRECT DIGGING}

The present invention relates to a direct excavated tunnel shaft provisional facility for maintaining a natural slope and to enable the excavation of the tunnel without the formation of a separate shaft slope, and more specifically to protect the slope slope of the tunnel shaft using a structural carbon steel pipe In order to prevent damage to natural slopes in an eco-friendly manner, the steel pipes for multi-stage grouting are joined to the pre-shaft provisional facilities, and then moved to the excavation scheduled part to reinforce the excavation top end by grouting to enable immediate excavation. The present invention relates to a method of constructing a direct excavation tunnel shaft refurbishment that has been supplemented to minimize damage and shorten air.

In general, the excavation work is performed after the preliminary shaft slope is formed for the tunnel excavation, and after the temporary facility is installed at the site of the shaft portion, a considerable time is required when the shaft slope is formed, and most of the work damages the natural slope. This is a very disadvantageous condition in terms of environment.

1 is a view showing the state of the composition of the shaft slope to be pre-executed during the general tunnel excavation, the natural slope 1 is cut, the interference pile (2) and the surface protection hole (3) is installed on the cut slope do.

At this time, the cut surface is often provided with a concrete retaining wall in the lower portion.

Barring a substantial portion of the natural slope (1) proceeds to the cutting, the stress is released due to the excavation and will contain the possibility of collapse in the relaxed portion.

Figure 2 is a view showing the form of the temporary installation to be installed in the tunnel shaft portion, it is common to proceed with the excavation after installing the temporary facility using the rod 5 and the log 4 after the shaft slope is formed.

As in the conventional conventional method described above, in order to damage the pre-natural slope and form the shaft slope, and when the tunnel excavation is performed after the installation of the shaft provisional provision, the artificially formed slope is additionally secured. As construction of reinforcement and surface protection is required, construction costs are high, and a considerable amount of air is required to create a slope.

The present invention, in order to solve the above-described problems, the present invention relates to a shaft provisional provision of a ready-made product to maintain the natural slope and to enable the excavation of the tunnel without the formation of a separate shaft slope, more specifically for structural Carbon steel pipe is used to protect the sloped slope of the tunnel shaft and to prevent the damage of natural slope as much as possible. The purpose of the present invention is to provide a method of constructing a direct excavation tunnel shaft rehabilitation system which is supplemented to minimize the environmental damage and to shorten the air since it can be immediately excavated.

The present invention, in order to achieve the above object, the present invention, structural carbon steel pipe, H (H) -beam, earth plate, wale (WALE), including a removable anchor is installed in the tunnel shaft, (H)-After joining the structural carbon steel pipe by welding using the support, weld the temporary facility 20 to the excavation scheduled part and perform steel pipe multi-stage grouting on the top end to perform excavation after reinforcement. After the lining is installed, the soil is formed from the forming part of the gang to stabilize the slopes by exerting the soil effect on the natural slopes. In case of collapse, it can be supported by structural carbon steel pipe and earth plate so that tunnel can be excavated immediately by using temporary facility without forming shaft slope. It provides direct drilling shaft gasiseol Tunnel construction method.

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation state of the present invention.

FIG. 3A is a view showing a situation in which the structural carbon steel pipe 6 is installed in the temporary facility and moved to the excavation scheduled part, FIG. 3B is a perspective view of the temporary facility, FIG. 3C is an enlarged view of part “A” of FIG. 3A, and FIG. 3D Is an enlarged view of a portion “B” of FIG. 3B.

Structural carbon steel pipe (6) to the prefabricated shaft part provisional facility 20 by welding at regular intervals to be bonded to move to the excavation scheduled portion to be reinforced by using the steel pipe multi-stage grouting.

The temporary facility 20 is formed in the form of a tunnel so that a plurality of H-shaped steel 7 is rounded on the top of the concrete foundation 11, and the earth plate 10 is inserted between the H-shaped steels 7 to be coupled. The wale 12 is reinforced on the outside of the H-beam 7 to support the temporary facility.

In addition, as can be seen in Figures 3b and 3c, the temporary facility 20, the reinforcing bar 8 is welded between the upper end formed so that the H-shaped steel 7 is rounded, structural carbon to the H-shaped steel (7) When the steel pipe 6 is welded, the support 9 is abutted on both sides of the structural carbon steel pipe 6 to weld more firmly.

4A is a view showing a side cross-sectional configuration of fixing the temporary structure to the excavation scheduled portion, and FIG. 4B is a view showing a state seen from the front of the temporary structure.

In order to smoothly work the multi-stage grouting of the steel pipe, a removable anchor 13 is used to fix the shaft provisional fixture 20 to the excavation scheduled part surface.

The removable anchor 13 is an anchor-type member on which one side is welded to the H-shaped steel, and is dismantled when the work of the tunnel is completed after using the temporary facility 20.

5 is a view showing a situation of carrying out excavation after installation of temporary installation.

After the shaft provisional installation 20 is installed, the excavation top end is reinforced while the natural slope 1 is maintained without forming the shaft slope, and the excavation of the tunnel is performed.

6 is a view showing the state of forming the surface after completion of the excavation and lining (15) installation.

When the excavation of the tunnel is completed and the lining 15 is installed, the shaft part temporary facility 20 is dismantled and the soil 16 is carried out from the shaft part 14 to the natural slope to secure additional slope stability. do.

<Example>

1. Structural Carbon Steel Pipe

  1) Diameter: 100mm

  2) Length: 2.0 ~ 5.0m (change according to natural slope)

  3) Installation interval: 200mm

  4) Mounting range: 120 °, 2 rows for ceiling ends

2. Removable Anchor

  1) Free field: 6m

  2) Settlement Site: 3m

  3) Strand: Diameter 12.7, 4 strands

3. Steel pipe support

  1) Size: Upper 50mm × 50mm, Lower 200mm × 200mm

  2) Height: 70mm ~ 200mm

4. H section steel

  1) Specification: 200 × 200 × 8 × 12

5. WALE

  1) Specification: 200 × 200 × 8 × 12

6. Earth plate

  1) Size: 700 × 150

  2) Thickness: 80mm

As can be seen in the above-described <Example>, using a structural carbon steel pipe 6 bonded to the shaft provisional provision 20 in advance, the drilling preliminary top end is reinforced to form tunnel excavation without forming a shaft slope. As it can be proceeded, it is very advantageous in terms of economics and disclosure, and the excavation is carried out without damaging the ground, which provides an environment-friendly movable shaft fitting facility.

The effects according to the configuration and operation state of the present invention described above will be described.

Directly drilled tunnel shaft temporary installation of the present invention, by joining the structural carbon steel pipe to the shaft temporary provision in advance to reinforce the drilling plan part to form a shaft slope can minimize environmental damage and can shorten the air The effect can be obtained.

In addition, since the movable shaft part temporary installation of the present invention, after the completion of the tunnel lining construction is carried out additional filling in the shaft part can be additionally secured the stability of the existing natural slope by using the crushed soil effect can contribute to the long-term stability of the slope Has an effect.

In addition, the direct drilling tunnel shaft temporary installation of the present invention, because it has a mobile structure can be changed in size and shape to suit the terrain is advantageous in terms of economics and has the effect of minimizing the generation of industrial waste.

In particular, due to the above-described reasons, it is possible to obtain an effect of providing a movable shaft provisional facility that can satisfy both the construction air shortening, construction cost reduction, stability of the natural slope and environmental aspects.

1 is a view showing a shaft slope formed state pre-executed during general tunnel excavation.

2 is a view showing a configuration of a temporary facility installed in a general shaft portion.

Figure 3a is a view showing a state moved to the excavation scheduled portion after installing the structural carbon steel pipe in the temporary facility, Figure 3b is a perspective view of the temporary facility, Figure 3c is an enlarged view "A" of Figure 3a, Figure 3d is a "B" of Figure 3b "Wealth of Magnification.

Figure 4a is a view showing a side cross-sectional configuration of fixing the temporary construction to the excavation scheduled portion, Figure 4b is a view showing a state seen from the front of the temporary construction structure.

5 is a view showing a situation of carrying out excavation after installation of temporary facilities.

Figure 6 is a view showing the state formed on the surface after completion of excavation and lining installation.

<Explanation of symbols for the main parts of the drawings>

1: natural slope 2: hard pile

3: surface protector 4: log

5: Stable 6: Structural Carbon Steel Pipe

7: H (H) 8: Rebar

9: support 10: earth plate

11: concrete foundation 12: WALE

13: removable anchor 14: face wall retaining wall

15: lining 16: fill

20: provisional facilities

Claims (2)

In the temporary installation including a structural carbon steel pipe (6), H-shaped steel (7), earth plate (10), wale (WALE) 12, removable anchor 13 and installed in the tunnel shaft portion, After joining the structural carbon steel pipe 6 by welding to the H-shaped steel 7 using the support 9, the temporary facility 20 is brought into close contact with the excavation schedule and the steel pipe is multi-stage grouted. Excavation should be carried out after reinforcement to prevent damage to the shaft slope, After the lining (15) is installed, the embankment (16) is carried out from the forming portion of the gang gate (14) to exert the effect of overpressure on the natural slope (1) to stabilize the slope, Under the influence of vibration during tunnel excavation, small scale collapse of natural slope (1) is supported by structural carbon steel pipe (6) and earth plate (10) so that tunnel can be excavated immediately by using temporary facility without forming shaft slope. Direct excavation tunnel shaft construction to allow construction. The method of claim 1, The structural carbon steel pipe (6) is to use the same material also used for general steel pipe multi-stage grouting, welded to the temporary facility by using a support (9) with a diameter of 100mm, to perform a multi-stage grouting of steel pipes after the close contact. To ensure that The removable anchor 13 is applied directly to support the temporary installation when the steel pipe multi-stage grouting and removed after installation of the lining (15) to remove the temporary facility 20, characterized in that the construction of a direct excavation tunnel shaft.