KR102608601B1 - Sheet non excavation method for drilling a tunnel having a file reinforcing structure - Google Patents

Abstract

The present invention relates to a trenchless tunnel excavation system and its construction method. The trenchless tunnel excavation system of the present invention includes a plurality of sheet piles (SHEET PILE) that are sequentially press-fitted or pushed into the inner wall of a tunnel, which is an underground structure, and are constructed on the upper and side parts of the inner wall of the tunnel; A plurality of linear guide rectangular pipes that move in a straight line or curve from the thrust port of the tunnel to the arrival port by the action of a hydraulic jack for propulsion and guide the excavation of earth and stone and the installation of the sheet pile; An upper ground disturbance unit that is coupled to the upper part of the linear guide rectangular pipe and causes ground disturbance to proceed at the corresponding position when the linear guide rectangular pipe is pressed in or pushed in; A side ground disturbance unit coupled to a side of the linear guide rectangular pipe and causing ground disturbance in the corresponding position when the linear guide rectangular pipe is pressed in or pushed in; A plurality of earth pressure supports connected to the sheet piles and supporting the sheet piles; And a plurality of tunnel supports connected to the earth pressure supports and supporting the earth pressure supports, wherein the linear guide square pipe is recovered from the arrival port and reused.

Description

Excavation system for trenchless tunnel and method thereof {Sheet non excavation method for drilling a tunnel having a file reinforcing structure}

The present invention relates to an excavation system for a trenchless tunnel and its construction method, and more specifically, to an underground structure without digging in places where it is difficult to clear the ground surface and construct, such as places with a lot of buried underground stuff or a lot of traffic. Not only can construction be possible, but unlike previous construction methods, by using a linear guide square pipe, not only can linear straightness or curved work be performed smoothly, but safety issues can be effectively resolved, hydraulic jacks can be miniaturized, and linear guide pipes can be used. This relates to a trenchless tunnel excavation system and method that can reuse guided square pipes, thereby contributing to reducing construction costs.

Recently, the use of underground spaces is increasing in urban areas due to the saturation of above-ground buildings. Methods for constructing underground structures to utilize underground space can be broadly divided into trenchless construction methods and trenchless construction methods.

The cut-and-cover method is a method of constructing a wall for excavation (C.I.P., H-Pile + earth plate, sheet pile, etc.) and then installing support materials (struts, earth anchors, etc.) while excavating. It is most commonly used in general excavation work. . However, when the cut-and-cut method is applied to urban construction, problems such as traffic congestion and the cost of moving obstacles may occur.

Therefore, in recent years, there has been an increasing trend in the application of trenchless construction methods in urban construction to resolve civil complaints due to traffic inconveniences and minimize the cost of moving obstacles. There are various types of trenchless construction methods currently applied, and each has different characteristics, so it is necessary to carefully consider each site situation and apply it.

Introducing the trenchless construction method.

First, the Pipe Roof Method. This is the most widely used trenchless construction method, and many of the trenchless construction methods currently being applied are methods developed by improving the Pipe Roof method.

Second, it is the PRS method (Pipe Roof Structure). A groove is formed in the horizontal direction on one side of the steel pipe, and an angle is installed on the other side to engage with the horizontal groove, connecting several steel pipes next to each other to maximize lateral rigidity, which is performed without a separate lateral support material. It is a public method.

Third, it is the UPRS method (Upgrade Pipe Roof Structure). This is an improved method of the PRS method, and is a method of press-fitting a bundle of steel pipes using a bundle of ready-made steel pipes with rails attached.

Fourth, the STS method (Steel Tube Slab). At the factory, a roof is formed in the ground using small steel pipes with wing steel plates attached. After reinforcing the lateral connections of the steel pipes with rebar, mortar is poured to form a longitudinally and horizontally integrated ramen structure, and the structure is excavated using support materials. This is a construction method.

Fifth, the TRcM method (Tubular Roof construction Method). A steel pipe equipped with a hydraulic adjusting device between the lead pipe and the follow-up pipe is pressed in with a hydraulic jack so that the line can be adjusted according to the longitudinal and cross-sectional gradients at the work area, and then the upper slab is completed by excavating the inside of the steel pipe, placing reinforcing bars, and pouring concrete. This is a method of constructing a structure by installing an underground vertical wall using a PC panel and support jack and then excavating the inside.

Sixth, the NTR method (New Tubular Roof). Install the earth pressure support in the steel pipe, cut the top, bottom, left and right sides of the press-fit pipe (D=2.2m), weld the outside or top of the cut with a steel plate to waterproof it, install form reinforcement to form the structure, and pour concrete to create the structure. This is a method of constructing a building and then excavating the internal soil.

Seventh, the TSM method (Tunnel of using Steel pipe Method). This is a method of installing reinforcing foam inside the steel pipe while press-fitting the steel pipe, forming a slot hole between the steel pipe and integrating it with a steel plate, and then excavating while installing a vertical support material on the formed roof.

Eighth, the DSM method (Divided Shield Method). This is an improved and developed method of the Messer Shield method, which was widely used in the mid-1900s. It solved the problem of the rear tail drooping during construction, which was a disadvantage of the Messer Shield method, and created a temporary roof and temporary roof by continuously press-fitting blade-shaped DSM panels (steel plates) by manpower. This is a method of forming a wall. In addition, the weak rigidity of the steel plate is reinforced with two-row ground reinforcement grouting to prevent ground loosening that may occur during excavation.

Ninth is the front jacking method. This is a method of forming a temporary roof using steel pipes and then towing the pre-fabricated structure using a hydraulic jack.

As briefly explained above, there are several types of trenchless construction methods, the biggest concept of which is to install temporary supports that can suppress surrounding deformation such as ground loosening before excavation, and then safely excavate to construct the structure.

Therefore, considering that the most important factors in selecting a construction method are field applicability and economic feasibility, there is a need for technological improvements to improve the existing construction method.

Korea Intellectual Property Office Application No. 10-2003-0072109

The purpose of the present invention is to be able to construct an underground structure without digging the ground in places where it is difficult to clear the ground surface and construct, such as places where there are a lot of underground structures or a lot of traffic, and, unlike previous construction methods, a linear guided square structure can be constructed. By using pipes, not only can linear straightness or curved work be performed smoothly, but safety problems can also be effectively resolved. Hydraulic jacks can be miniaturized and linear guide square pipes can be reused, which can contribute to reducing construction costs. The purpose is to provide an excavation system and construction method for trenchless tunnels.

The above purpose is to sequentially press-fit or propel the inner wall of a tunnel, which is an underground structure, and construct a plurality of sheet piles on the upper and side parts of the inner wall of the tunnel; A plurality of linear guide rectangular pipes that move in a straight line or curve from the thrust port of the tunnel to the arrival port by the action of a hydraulic jack for propulsion and guide the excavation of earth and stone and the installation of the sheet pile; An upper ground disturbance unit that is coupled to the upper part of the linear guide rectangular pipe and causes ground disturbance to proceed at the corresponding position when the linear guide rectangular pipe is pressed in or pushed in; A side ground disturbance unit coupled to a side of the linear guide rectangular pipe and causing ground disturbance in the corresponding position when the linear guide rectangular pipe is pressed in or pushed in; A plurality of earth pressure supports connected to the sheet piles and supporting the sheet piles; And a plurality of tunnel supports connected to the earth pressure supports and supporting the earth pressure supports, wherein the linear guide square pipe is recovered from the reach and reused. This is achieved by an excavation system for a trenchless tunnel. .

Both the upper ground disturbance portion and the side ground disturbance portion are provided so that a portion of the upper and side ends of the linear guide rectangular pipe is exposed, and when the linear guide rectangular pipe is pressed in or pushed, ground disturbance of the block progresses. Rotating saw blades for ground disturbance; a power generator that generates power to rotate the ground disturbance rotary saw blade; And it may include a motion transmission unit that connects the power generation unit and the ground disturbance rotating saw blade to transmit the motion so that the power generated by the power generation unit is transmitted to the rotational movement of the ground disturbing rotating saw blade.

The sheet pile is supported by a sheet pile support within the linear guide rectangular pipe, and a sheet pile connecting steel strip connecting the sheet pile is provided between the sheet pile support and the sheet pile, and the sheet pile connecting steel strip is provided. It is supported by this temporary support, and a linear retaining connector is provided on the inner wall of the linear guide rectangular pipe for maintaining the linear shape. A pushing pusher for press-fitting or pushing the linear guide rectangular pipe is provided on the inner wall of the linear guide rectangular pipe. The sheet pile is manufactured with a height (H) of 162 to 170 mm, a width (W) of 650 to 750 mm, and a thickness (T) of 12 to 20 mm. Immediately after installation of the sheet pile, the outside of the sheet pile is first filled with sand. After grouting is performed, secondary overburden filling grouting may be performed outside the primary sand filling grouting.

The purpose is to install a plurality of linear guide square pipes to move in a straight line or curve from the thrust port of the tunnel to the arrival port by the action of a hydraulic jack for propulsion; Excavating soil through the linear guide rectangular pipe and constructing a plurality of sheet piles (SHEET PILE); Constructing a plurality of earth pressure supports supporting the sheet piles; Constructing a plurality of tunnel supports supporting the earth pressure supports; And a step of recovering the linear guide square pipe from the arrival port, wherein immediately after installation of the sheet pile, primary sand filling grouting is performed on the outside of the sheet pile, and then performing primary sand filling grouting on the outside of the first sand filling grouting. It is also achieved by a trenchless tunnel excavation method, characterized in that secondary overburden filling grouting is performed.

According to the present invention, it is possible to construct an underground structure without digging the ground in places where it is difficult to clear the ground surface and construct, such as places where there are a lot of underground structures or a lot of traffic, and unlike previous construction methods, the linear guided square pipe By using , linear straightness or curved work can be performed smoothly and safety problems can be effectively resolved. Hydraulic jacks can be miniaturized and linear guide square pipes can be reused, which can contribute to reducing construction costs. there is.

1 is a schematic diagram of an excavation system for a trenchless tunnel according to an embodiment of the present invention.
Figure 2 is a detailed view of Figure 1 showing the process of propulsion of a linear guide square pipe and installation of sheet piles.
Figure 3 is a diagram showing a sheet pile coupled to the top inside a linear guided rectangular pipe.
Figure 4 is a diagram showing a sheet pile coupled to the side of the linear guide rectangular pipe.
Figure 5 shows the specifications of the sheet pile.
Figure 6 is a diagram showing the upper ground disturbance section and the side ground disturbance section of the linear guided rectangular pipe.
Figure 7 is a schematic diagram of the operation of linear guided rectangular pipe and sheet pile.
Figure 8 is a completed cross-sectional structural diagram of the tunnel.
Figure 9 is an enlarged view of the main part of Figure 8.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms.

In this specification, the present embodiments are provided to complete the disclosure of the present invention and to fully inform those skilled in the art of the scope of the invention. And the present invention is only defined by the scope of the claims.

Accordingly, in some embodiments, well-known components, well-known operations and well-known techniques are not specifically described to avoid ambiguous interpretation of the invention.

Like reference numerals refer to like elements throughout the specification. And the terms used (mentioned) in this specification are for describing embodiments and are not intended to limit the present invention.

In this specification, singular forms also include plural forms unless specifically stated in the phrase. In addition, components and operations (operations) referred to as 'including (or including)' do not exclude the presence or addition of one or more other components and operations.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings that can be commonly understood by those skilled in the art to which the present invention pertains.

Additionally, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless they are defined.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 1 is a schematic diagram of an excavation system for a trenchless tunnel according to an embodiment of the present invention, Figure 2 is a detailed diagram of Figure 1 showing the process of propulsion of a linear guide square pipe and installing sheet piles, Figure 3 is a diagram showing the process of propulsion and installing sheet piles Figure 4 is a diagram showing sheet piles coupled to the top of the linear guided rectangular pipe, Figure 4 is a drawing of sheet piles coupled to the sides inside the linear guided rectangular pipe, Figure 5 is the specifications of the sheet pile, and Figure 6 is the upper part of the linear guided rectangular pipe. A drawing showing the ground disturbance section and the side ground disturbance section, FIG. 7 is a schematic diagram of the work of the linear guide square pipe and sheet pile, FIG. 8 is a completed cross-sectional structure of the tunnel, and FIG. 9 is an enlarged view of the main part of FIG. 8.

Referring to these drawings, the present invention not only allows construction of underground structures without digging in places where it is difficult to clear the ground surface and construct, such as places with many underground structures or heavy traffic, but also, unlike previous construction methods, By using the linear guide square pipe (110), not only can linear straightness or curved work be performed smoothly, but also safety problems can be effectively solved, hydraulic jacks can be miniaturized, and the linear guide square pipe (110) can be reused. This can contribute to reducing construction costs.

In particular, the present invention, which is constructed using the structure and method below, is a method of sequentially press-fitting and propelling the sheet pile (100, SHEET PILE) using the linear guide square pipe 110, so the small-scale driving force and press-fit time are short. In addition, it is possible to construct structures with a minimum cover height (less than 0.5m of subgrade and magnetic barriers), and rapid response to obstacles or ground changes is possible. In addition, sagging is prevented and safety is ensured by securing the bearing capacity of the support, excavation and embankment properties are advantageous, and quick action is possible when obstacles are encountered. In addition, it has a significant effect of shortening the construction period and reducing construction costs compared to the perforated method, and can provide excellent waterproofing effects.

The trenchless tunnel excavation system according to this embodiment that can provide such effects includes sheet piles 100 and linear guide square pipes 110, and includes the following structures and configurations for their construction.

The sheet pile 100 is sequentially press-fitted or pushed into the inner wall of a tunnel, which is an underground structure (see FIGS. 8 and 9), and is constructed on the upper and side parts of the inner wall of the tunnel. Sheet piles 100 are continuously constructed on both the top and sides except the bottom of the tunnel. Accordingly, there are a plurality of sheet piles 100.

The grouting valve 30 may later be coupled to the sheet pile 100. Through this, immediately after installation of the sheet pile 100, primary sand filling grouting 171 is performed on the outside of the sheet pile 100, and then secondary overburden filling grouting is performed on the outside of the primary sand filling grouting 171. This 172 can be performed. Therefore, complete waterproofing becomes possible.

The sheet pile 100 can be manufactured with a height (H) of 162 to 170 mm, a width (W) of 650 to 750 mm, and a thickness (T) of 12 to 20 mm, as shown in FIG. 5.

In addition, the sheet pile 100 is supported by a sheet pile support 151 within the linear guided rectangular pipe 110, and between the sheet pile support 151 and the sheet pile 100 is a connection between the sheet pile 100. A sheet pile connection band steel plate (152) is provided. Therefore, a plurality of sheet piles 100 can be connected and constructed. At this time, the sheet pile connecting steel strip 152 may be supported by the temporary support 153.

On the other hand, the linear guide square pipe 110 runs in a straight line from the thrust port (A) of the tunnel to the arrival port (B) by applying the hydraulic jack (10) for propulsion from the propulsion worktable (20) where the propulsion port (A) is located. As a curved moving structure, it allows excavation of earth and stone and installation of sheet piles 100.

A plurality of linear guide square tubes 110 may be connected to the side and rear. A plurality of linear maintenance connectors 111 are provided on the inner wall of the linear guide square tube 110 to maintain the linearity. In addition, a propulsion pusher 112 is provided on the inner wall of the linear guide rectangular pipe 110 for press-fitting or pushing the linear guide rectangular pipe 110.

The linear guide square pipe 110 is provided with an upper ground disturbance unit 120 and a side ground disturbance unit 130.

The upper ground disturbance unit 120 is coupled to the upper part of the linear guide rectangular pipe 110, and is a means for causing ground disturbance at the corresponding position when the linear guide rectangular pipe 110 is pressed in or pushed.

This upper ground disturbance portion 120 is provided so that a portion of the upper end of the linear guide rectangular pipe 110 is exposed, and when the linear guide rectangular pipe 110 is pressed in or pushed in, the ground disturbance causes the ground disturbance to proceed. A power generator 122 that generates power to rotate the rotary saw blade 121 for ground disturbance, and the power generated from the power generator 122 to rotate the rotary saw blade 121 for ground disturbance. It includes a motion transmission unit 123 that transmits the motion by connecting the power generation unit 122 and the rotating saw blade 121 for ground disturbance to be transmitted as a rotational motion.

The side ground disturbance unit 130 is coupled to the side of the linear guide rectangular pipe 110 and is a means for causing ground disturbance at the corresponding location when the linear guide rectangular pipe 110 is pressed in or pushed.

This side ground disturbance portion 130 is provided so that a portion of the side of the linear guide rectangular pipe 110 is exposed, and when the linear guide rectangular pipe 110 is pressed in or pushed in, the ground disturbance causes the ground disturbance to proceed. A power generator 132 that generates power to rotate the rotary saw blade 131 for ground disturbance, and the power generated from the power generator 132 to rotate the rotary saw blade 131 for ground disturbance. It includes a motion transmission unit 133 that transmits the motion by connecting the power generation unit 132 and the rotating saw blade 131 for ground disturbance to be transmitted as a rotational motion.

As described above, the linear guide square pipe 110 moves in a straight line from the propulsion port (A) of the tunnel to the arrival port (B) by applying the hydraulic jack (10) for propulsion from the propulsion worktable (20) where the propulsion port (A) is located. Or it is a structure that moves along a curve. Accordingly, the linear guide square tube 110 that has reached the arrival port B can be recovered and reused. Therefore, it can contribute to cost reduction.

Hereinafter, the use of the trenchless tunnel excavation system will be described.

First, a plurality of linear guide square pipes (110) are installed to move in a straight line or curve from the thrust port (A) of the tunnel to the arrival port (B) by the action of the hydraulic jack for propulsion (10).

Next, the soil is excavated through the linear guide square pipe 110, and a plurality of sheet piles 100 are constructed. Sheet piles 100 are constructed on both the top and sides of the tunnel. When construction is completed, the linear guide square pipe 110 is recovered from the arrival port (B).

Next, after constructing a plurality of earth pressure supports 150 supporting the sheet piles 100, a plurality of tunnel supports 160 supporting the earth pressure supports 150 are constructed.

In this way, immediately after installation of the sheet pile 100, primary sand filling grouting 171 is performed on the outside of the sheet pile 100, and then secondary overburden filling grouting is performed on the outside of the primary sand filling grouting 171 (172). ) is performed, construction can be completed.

According to this embodiment, which operates based on the structure described above, it is possible to construct an underground structure without digging a site in places where it is difficult to clear the ground surface and construct, such as in places where there are a lot of buried underground items or a place with a lot of traffic. Of course, unlike previous methods, by using the linear guide square pipe 110, not only can linear straightness or curved work be performed smoothly, but safety problems can also be effectively solved, and hydraulic jacks can be miniaturized and linear guide square pipes can be used. The pipe 110 can be reused, contributing to reducing construction costs.

In particular, in the case of this embodiment, small-scale driving force and press-in time are short, construction of a structure with a minimum cover height (0.5 m or less for subgrade and self-covering) is possible, rapid response to obstacles or ground changes is possible, and the bearing capacity of the support is secured. This prevents sagging and ensures safety, has advantageous excavation and topping properties, allows quick action when encountering obstacles, has a significant effect on shortening the construction period and reducing construction costs compared to the perforated method, and can provide excellent waterproofing effects.

As such, the present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and changes can be made without departing from the spirit and scope of the present invention. Therefore, it should be said that such modifications or variations fall within the scope of the claims of the present invention.

A: Propulsion port B: Reach port
10: Hydraulic jack for propulsion 100: Sheet pile
110: Linear guide square tube 111: Linear retaining connector
112: Propulsion push bar 120: Upper ground disturbance section
121: Rotating saw blade for upper ground disturbance 122: Upper power generation unit
123: upper motion transmission unit 130: side ground disturbance unit
131: Rotating saw blade for side ground disturbance 132: Side power generation unit
133: side motion transmission unit 151: sheet pile support
152: Sheet pile connection steel plate 153: Temporary support
150: earth pressure support 160: tunnel support
171: 1st sand filling grouting 172: 2nd overburden filling grouting

Claims (4)

delete A plurality of sheet piles (SHEET PILE) sequentially press-fitted or pushed into the inner wall of a tunnel, which is an underground structure, and constructed on the upper and side parts of the inner wall of the tunnel;
A plurality of linear guide rectangular pipes that move in a straight line or curve from the thrust port of the tunnel to the arrival port by the action of a hydraulic jack for propulsion and guide the excavation of earth and stone and the installation of the sheet pile;
An upper ground disturbance unit that is coupled to the upper part of the linear guide rectangular pipe and causes ground disturbance to proceed at the corresponding position when the linear guide rectangular pipe is pressed in or pushed in;
A side ground disturbance unit coupled to a side of the linear guide rectangular pipe and causing ground disturbance in the corresponding position when the linear guide rectangular pipe is pressed in or pushed in;
A plurality of earth pressure supports connected to the sheet piles and supporting the sheet piles; and
It is connected to the earth pressure supports and includes a plurality of tunnel supports supporting the earth pressure supports,
The linear guide square tube is recovered from the arrival port and reused,
Both the upper ground disturbance unit and the side ground disturbance unit,
A rotating saw blade for ground disturbance, which is provided to expose a portion of the upper and side ends of the linear guide rectangular pipe, and which causes ground disturbance to proceed when the linear guide rectangular pipe is pressed in or pushed in;
a power generator that generates power to rotate the ground disturbance rotary saw blade; and
A trenchless tunnel comprising a motion transmission unit that connects the power generation unit and the ground disturbance rotary saw blade to transmit the motion so that the power generated by the power generator is transmitted to the rotational movement of the ground disturbance rotary saw blade. For excavation system.
A plurality of sheet piles (SHEET PILE) sequentially press-fitted or pushed into the inner wall of a tunnel, which is an underground structure, and constructed on the upper and side parts of the inner wall of the tunnel;
A plurality of linear guide rectangular pipes that move in a straight line or curve from the thrust port of the tunnel to the arrival port by the action of a hydraulic jack for propulsion and guide the excavation of earth and stone and the installation of the sheet pile;
An upper ground disturbance unit that is coupled to the upper part of the linear guide rectangular pipe and causes ground disturbance to proceed at the corresponding position when the linear guide rectangular pipe is pressed in or pushed in;
A side ground disturbance unit coupled to a side of the linear guide rectangular pipe and causing ground disturbance in the corresponding position when the linear guide rectangular pipe is pressed in or pushed in;
A plurality of earth pressure supports connected to the sheet piles and supporting the sheet piles; and
It is connected to the earth pressure supports and includes a plurality of tunnel supports supporting the earth pressure supports,
The linear guide square tube is recovered from the arrival port and reused,
The sheet pile is supported by a sheet pile support within the linear guide rectangular pipe,
A sheet pile connecting steel plate is provided between the sheet pile support and the sheet pile,
The sheet pile connecting steel plate is supported by temporary supports,
A linear maintenance connector is provided on the inner wall of the linear guide rectangular pipe to maintain the linearity,
A propulsion pusher is provided on the inner wall of the linear guide rectangular pipe to press-fit or propel the linear guide rectangular pipe,
The sheet pile is manufactured with a height (H) of 162 to 170 mm, a width (W) of 650 to 750 mm, and a thickness (T) of 12 to 20 mm.
Immediately after installation of the sheet pile, primary sand filling grouting is performed on the outside of the sheet pile, and then secondary overburden filling grouting is performed on the outside of the primary sand filling grouting. An excavation system for a trenchless tunnel. .
delete

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