KR101123036B1 - Method for installing waterproofing steel plate and soil-drop preventing plate in construction of undergound tunnel - Google Patents

Abstract

The present invention provides a method for installing underground tunnels to form underground tunnels by first installing tunnel-forming structures in the ground without having to excavate the earth and sand of the tunnel-excavated portion to endure sufficiently stress in advance and then excavating the inside of the structures. In particular, the present invention relates to a method of installing a earth-proof plate and a waterproof steel plate for connecting the upper and lower portions of the steel pipe to press the steel pipe for forming the structure and then to form the sidewalls.

Installing temporary earth pressure support for reinforcing steel pipe to excavate and cut inner soil of the upper and lower steel pipes pressed in the required position, and to press-fit waterproof steel plate and earthproof plate on the lower part of upper steel pipe and the upper part of lower steel pipe. A process of forming each of the incision grooves, and a step of press-ining the guide plate composed of a direction guide plate, a gap maintaining plate, and an earth leakage prevention plate in the propulsion direction by a hydraulic jack supported by a reaction table along the cut groove of the steel pipe, and a lower steel pipe Installing the excavated soil moving device in the inside and cutting the upper part of the lower steel pipe corresponding to the inner space of the two guide plates and excavating the space between the two guide plates to excavate the side wall space, and the excavated side walls between the two guide plates. The process of installing the earth pressure support beam that vertically connects the upper and lower steel pipes to the space part, and the earth prevention plate and waterproof plate on the beam, In the space where the plate and waterproof plate are installed, the reaction table is moved to the direction of propulsion and presses the guide plate in the direction of propulsion again by the hydraulic jack, and the process of repeatedly performing the above excavation process, earth prevention plate and waterproof plate installation process In that,

Unlike the conventional method that caused problems such as soil loss and delay of construction period, excavation is carried out inside the press-fitted guide plates, so there is no soil loss, and the cost of construction can be reduced by simplifying the process and shortening the construction period. The plate can be applied to curved curve forming section by moving the guide plate and hydraulic jack. Therefore, it is possible to reduce construction cost and safe construction without soil loss in curve section.

Steel pipe press-in, underground tunnel, side wall, earth prevention plate, waterproof steel plate

Description

Method for installing waterproofing steel plate and soil-drop preventing plate in construction of undergound tunnel}

The present invention provides a method for installing underground tunnels to form underground tunnels by first installing tunnel-forming structures in the ground without having to excavate the earth and sand of the tunnel-excavated portion to endure sufficiently stress in advance and then excavating the inside of the structures. In particular, the present invention relates to a method of installing a earthproof plate and a waterproof steel plate for connecting the upper and lower sides of the steel pipe to form sidewalls after pressing the steel pipe for forming a structure.

Existing underground tunnel formation structure installation method has a slight process difference depending on the type of construction, but most of the steel pipe press position measurement and track pipe installation process to complete the steel pipe press preparation by surveying the exact position along the planned tunnel construction surface and,

Steel pipe press-in process of placing the steel pipe in the position to press the steel pipe and press-fitting the steel pipe step by step using the hydraulic jack and the propulsion auxiliary pipe;

Digging soil and installing the earth prevention plate through the earth prevention plate inlet formed in the leading pipe in the steel pipe press-in process;

An out-of-gang grouting process that prevents soil leakage by cement grouting around the earth barrier;

Steel pipe connection process of cutting the side of the steel pipe to a predetermined width and connecting between the steel pipe and the steel pipe with an iron plate,

When the side wall formation is necessary, the process of installing the waterproof steel plate while installing the earth plate and the earth pressure support for forming the side wall,

The process of installing formwork in space such as steel pipe,

Process of reinforcing steel bars in steel pipes and formwork,

The process of pouring concrete in steel pipes and formwork,

After curing the concrete, the tunnel tunnel inside the structure was excavated and the underground tunnel formation was installed.

Looking more closely at the process of installing a waterproof steel plate to form a side wall followed by a vertical steel pipe,

The bottom of the steel pipe is cut at regular intervals in the pressurized upper and lower steel pipes to form the side wall, and the earth plate is installed at the lower part, excavating to the lower steel pipe and installing earth pressure support, and then installing waterproof steel plate on the outer side of the excavation part. After installing reinforcement in the inner space, install concrete sidewalls at regular intervals by placing concrete, and then incise the remaining parts again and install the earth plate and waterproof steel plate in the same way as above. By forming continuously, the upper and lower steel pipes formed sidewalls connected to each other.

The construction method of the side wall is to repeat the partial incision and installation, and the earth plate and the earth pressure support must also be installed by repeating the narrow earth plate repeatedly. Therefore, the construction method is complicated and the secondary concrete must be poured again after curing the primary concrete. Due to the large amount of work, the increase of the construction cost causes not only the problem of increasing the construction cost but also the loss of earth pressure during the partial construction process.

In order to eliminate the above-mentioned problems, the applicant of the present invention forms a sidewall by continuous press-fitting of a waterproof steel plate, such as Patent Application No. 2009-55321, that is, forming an insertion groove for inserting a waterproof steel plate in upper and lower steel pipes. It has been invented a method of installing a waterproof steel plate for sidewall formation by continuously indenting the waterproof steel plate and the earth prevention plate, and excavating the inner space thereof and supporting them with a earth pressure support therebetween.

However, the continuous press-fit method of the waterproof steel sheet is a method of continuously press-fitting the insertion groove along the insertion groove by pushing the waterproof steel plate from the rear side by hydraulic pressure, so it is very efficient for the straight section, but in the section where the tunnel forms a curved curve in the rear side Since the pressure input does not reach the tip of the curve, it is difficult to apply the method.

The present invention eliminates the problems as described above when the side wall is formed by installing a waterproof steel plate and an earth leakage prevention plate connecting the upper and lower steel pipes in the steel pipe pressurized underground tunnel structure forming method, and continuously cutting the grooves in the upper and lower steel pipes as a whole After forming and promoting the guide plate, the waterproof steel plate and the earth prevention plate are installed in the inner space of the guide plate in sequence, and then the guide plate is again pushed and the earth prevention plate is installed in the pushed space. It is an object of the present invention to provide a method for installing a side wall forming waterproofing iron plate and an earthquake preventing plate, which can be applied to a curved curve section while preventing air loss and shortening the air by simplifying the process.

As a technical means for achieving the above object,

Installing a temporary earth pressure support for steel pipe reinforcement to excavate and cut the inner soil of the upper and lower steel pipes pressed into the required position;

Forming a cutout groove for press-fitting the waterproof steel plate and the earth prevention plate at the lower side of the upper steel pipe and the upper side of the lower steel pipe, respectively;

A step of press-fitting the guide plate composed of a direction guide plate, a gap maintaining plate, and an earth leakage prevention plate in the propulsion direction by a hydraulic jack supported by a reaction table along the cut groove of the steel pipe;

Installing an excavated soil moving device in the lower steel pipe, cutting the upper portion of the lower steel pipe corresponding to the inner space of the two guide plates, and excavating the space between the two guide plates to excavate the side wall space;

Installing a beam for earth pressure support that vertically connects the upper and lower steel pipes to the excavated side wall space between the guide plates on both sides and installing an earth leakage prevention plate and a waterproof plate on the beam;

The process of moving the reaction table to the direction of propulsion in the space where the earth prevention plate and the waterproof plate are installed, pressing the guide plate back into the pushing direction by the hydraulic jack, and repeating the previous excavation process, installation of the earth prevention plate and the waterproof plate to,

It is to complete the installation of the earth barrier plate and the waterproof steel plate for forming the side wall.

The installation method of the side wall forming waterproof steel plate and the earth prevention plate according to the present invention by installing a second part after the partial installation of the second part, unlike the conventional method that caused problems such as soil loss and construction period delayed both side guide plate Excavation from the inside of the building eliminates the loss of soil and reduces the cost of construction by simplifying the process and shortening the construction period. Also, the construction can be applied to the curved curve section by moving the guide plate's direction guide plate and the hydraulic jack. Thus, even in the curve section, there is an effect that can reduce the cost of safe construction and construction without loss of soil.

Hereinafter, embodiments of the present invention will be described in detail by the accompanying drawings.

1A to 1G are explanatory diagrams for each process of the installation method of the waterproof steel plate and the earth leakage prevention plate for sidewall molding according to the present invention.

Indentation of the steel pipe is the same as the existing method of installing the underground tunnel forming structure, that is, the steel pipe is positioned at the correct position along the tunnel construction plan and continuously presses the steel pipe using the hydraulic jack and the propulsion auxiliary pipe as shown in FIG. 1A. The upper and lower steel pipes 10 and 10 'are pressed into the portion where the side wall of the tunnel is formed, and the inside of the steel pipe is excavated.

Here, the steel pipe can be selected and used round or square tube on the cross-section according to the design, and the propulsion direction can be press-fitted in a straight line or curve.

Inside the excavated steel pipe as shown in Figure 1b by installing a temporary earth pressure support (20, 20 ') for reinforcing the steel pipe to have a load capacity against the earth pressure on the steel pipe.

At this time, between the cutting grooves to be formed in the next process to form a steel plate portion support bar 30 to weld with the cutting iron plate 40 to prevent separation of the iron plate due to the formation of the cutting grooves.

The lower surface of the upper steel pipe 10 corresponding to the portion where the waterproof steel plate and the earth prevention plate are to be positioned as shown in FIG. 1C inside the upper and lower steel pipes 10 and 10 'provided with the temporary earth pressure support 20, 20'. Cut the left and right in each of the upper surface of the lower steel pipe (10 ') and forms the incision grooves 50, 50' to be continuously formed in the front and rear directions.

In the front portion of the upper and lower steel pipes 10 and 10 'formed with the cutting grooves 50 and 50', guide plates 60 and 60 'are inserted into the cutting grooves 50 and 50' as shown in FIG. Press-fit along the incision grooves 50, 50 '.

Here, the guide plate 60, 60 'is a direction guide plate 61, the gap maintaining plate 62, the earth prevention plate 63 is joined by welding, as shown in Figure 2, for pressing in It is welded to the beam 64, and the hydraulic jack 70 is installed on the press-fit beam 64 to press in the pushing direction.

The direction guide plate 61 guides the propulsion direction of the guide plate 60 in a straight or curved line along the cut grooves 50 and 50 'while being inserted into the cut grooves 50 and 50'.

The gap maintaining plate 62 maintains the gap between the direction guide plate 61 and the earth prevention plate 63 to hold each other. The earth prevention plate 63 is a steel pipe having the thickness of the gap maintaining plate 62. Since it is located on the outside from the cutting groove 50 of 10) will be able to secure a space for installing the earth pressure supporting beam 80 on the outside of the cutting groove 50 of the steel pipe 10 in a subsequent process,

The earth prevention plate 63 abuts between the upper and lower steel pipes 10 and 10 'at the outside of the incision grooves 50 and 50' and receives the inside of the guide plate 60 and 60 'from the outside. It is to prevent the earth and sand to be lost to the inner space that is excavated while supporting the earth pressure.

By operating the hydraulic jack 70 supported on the reaction table 71 by the role of the guide plates 60, 60 'as shown in FIG. 3 while advancing the press-fit beam 64 in the pushing direction. The press-fit beam 64 and the fixed guide plates 60 and 60 'are press-fitted in a straight or curved propulsion direction along the cutouts 50 and 50'.

As described above, in the state where the guide plates 60 and 60 'are advanced by the front and rear width thereof, the excavated soil moving device 90 is installed and press-fitted in the lower steel pipe as shown in FIG. 1E. After cutting a portion of the lower steel pipe (10 ') corresponding to the front and rear width of'), excavation of soil between the two guide plates (60, 60 ') to form a space in which the side wall is to be formed.

Up and down protruding into the earth prevention plate 63 of the guide plate 60, 60 'in the side wall space formed between the two guide plates 60, 60' by excavation as shown in Figs. 1F and 4A. The earth pressure support members 83 and 83 'are welded to the left and right ends at the cutting ends of the steel pipes 10 and 10' and are supported by the earth pressure support beams 80 and 80 'at the left and right ends thereof. The steel pipes 10 and 10 'are welded in the vertical direction to provide a load resistance to earth pressure, and the earth-blocking plate 81 and 81 are inserted between the beams 80 and 80' as shown in FIG. 4B. ') Is inserted and installed on the surface of the portion corresponding to the outside of the side wall with respect to the tunnel as shown in Figure 4c to weld to the waterproof plate 82, 82'.

After the installation of the earth leakage prevention plates 81, 81 'and the waterproof plates 82, 82' is completed, the position of the reaction force 71 is moved forward based on the propulsion direction as shown in FIG. 4D. After mounting on the surface of 10 ', the guide plates 60 and 60' are again along the incision grooves 50 and 50 'in the same manner as the press-fitting process described above while operating the hydraulic jack 70 again with the support force thereof. It presses in the direction of underground propulsion.

If the repeated indentation process, excavation process, earth prevention plate and installation process are repeated, the upper and lower steel pipes 10 and 10 'are connected to the earth prevention plate 81, 81' and the waterproof plate (as shown in FIG. 1g). The side wall space between the tunnel construction sections designed in the state of through connection by 82 and 82 'is formed in a straight or curved direction.

The installation method of the side wall forming waterproof steel plate and the earth leakage prevention plate by the construction method is different from the conventional method in which the problems such as soil loss and construction period delay are caused by installing the second part after the partial installation. Excavation from the inside, there is no loss of soil, and the cost of construction is reduced by simplifying the process and shortening the construction period. In addition, the construction can be applied to the curved curve section by moving the guide plate's direction guide plate and hydraulic jack. Even in the curve section, it is possible to reduce the cost of safe construction and construction without losing soil.

1A to 1G are process explanatory diagrams of a method of installing a sidewall forming earth barrier plate and a waterproof plate of the present invention;

1A is an explanatory view of the upper and lower pipes

Figure 1b is a perspective view of the earth pressure support is installed inside the upper and lower pipes.

Figure 1c is a perspective view and some detailed description of the incision groove formed in the upper and lower pipes.

Figure 1d is a perspective view and a partial detailed view of the state in which the waterproof plate and the earth leakage prevention plate in the incision groove of the upper and lower pipes.

1E is a perspective view and a side cross-sectional view of a side wall space excavation state between guide plates;

Figure 1f is a perspective view and a partial detail and side cross-sectional view of the state in which the earth prevention plate and the waterproof plate is installed.

Figure 1g is a perspective view of the earth prevention plate and the waterproof plate is installed

Figure 2 is a detailed explanatory view of the guide plate of the present invention.

Figure 3 is a detailed explanatory view of the guide plate indentation state of the present invention.

Figure 4a to 4d is a detailed explanatory view of the installation of the earth prevention plate and waterproof plate of the present invention,

4A is an explanatory diagram of a state in which a earth pressure supporting beam is installed;

Figure 4b is a state explanatory diagram sandwiched in the earth pressure prevention plate to the earth pressure supporting beam.

Figure 4c is an explanatory diagram of a state in which the waterproof plate coupled to the earth leakage prevention plate.

4D is an explanatory diagram of a state in which the hydraulic jack and the reaction force port are moved and installed.

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

10,10 ': Steel pipe 20,20': Temporary earth pressure support

30,30 ': Supporting bar 40: Cutting iron plate

50,50 ': Incision groove 60,60': Guide plate

61: direction guide plate 62: gap maintaining plate

63: earth prevention plate 64: press-fit beam

70: hydraulic jack 71: reaction table

80: earth pressure supporting beam 81,81 ': earth prevention plate

82,82 ': Waterproof plate 90: Excavation soil moving device

83,83 ': Earth Pressure Support

Claims (2)

delete Installing temporary earth pressure support for reinforcing steel pipe to excavate and cut inner soil of the upper and lower steel pipes pressed in the required position, and to press-fit waterproof steel plate and earthproof plate on the lower part of upper steel pipe and the upper part of lower steel pipe. Forming the cutting grooves, pressing the guide plate along the cutting groove of the steel pipe in the pushing direction by the hydraulic jack supported by the reaction table, and installing the excavated soil moving device in the lower steel pipe and Cutting the upper part of the lower steel pipe corresponding to the space and excavating the side wall space by excavating the space between the two guide plates, and the cutting end of the upper and lower steel pipes of the excavated side wall space portion between the two guide plates by earth pressure support. Welded to the left and right, and the earth pressure support beam is installed at the left and right ends of the earth pressure support vertically to connect the upper and lower steel pipes. The process of installing the prevention plate and the waterproof plate, the process of moving the reaction table to the propulsion direction in the space where the earth prevention plate and the waterproof plate are installed, and pressing the guide plate back to the propulsion direction by the hydraulic jack, electrical excavation process, prevention of the earth In the installation method of the sidewall forming earth barrier plate and waterproofing steel plate in the steel pipe pressurized underground tunnel structure forming method characterized in that the process of repeating the plate and waterproof plate installation process, The guide plate is a direction guide plate for guiding the propulsion direction, the earth prevention plate for preventing the loss of soil between the upper and lower steel pipes, and the space between the aforementioned direction guide plate and the earth prevention plate to each other Side wall formation in steel pipe press-type underground tunnel structure forming method, characterized in that the gap retaining plate to be coupled and the lower part is welded to the press-fitting beam to install the hydraulic jack is pressed in the pushing direction by the hydraulic jack. Installation method of earth prevention plate and waterproof steel plate.

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