KR101877436B1 - Tunnel construction method for non-cutting natural ground - Google Patents

Abstract

The present invention relates to a method for constructing a tunnel without cutting a natural ground. The method comprises the steps of: inserting steel pipes while or after performing punching in a tunnel shape on a natural ground where a tunnel starts, and grouting either the inside or the outside, or both the inside and the outside of the steel pipes; regularly adjusting the lengths of the rear ends of the steel pipes; coupling the steel pipes and a guide beam; assembling and coupling a tunnel portal structure; installing a steel plate on the tunnel portal structure; installing a steel rib; and depositing lining concrete. The economic feasibility is improved.

Description

Tunnel construction method for non-cutting natural ground

TECHNICAL FIELD The present invention relates to a tunnel construction method without slab cutting.

Generally, when tunnels are excavated, the slope is cut at the viewpoint of the tunnel and a gantry is installed. Therefore, the natural environment is damaged by slitting the upper and lower slopes of the tunnel shaft, the slope around the tunnel shaft becomes unstable, additional slope reinforcement is necessary to prevent the slope collapse, and the construction cost is increased. In addition, since a considerable area of paper is additionally required in order to stabilize the cut slope, the slope construction cost is excessive.

In order to solve the above problem, a technique of inserting a plurality of steel pipes in an arch form into a ground to be excavated in a state of not cutting the ground sheet and grouting, and reinforcing the tunnel excavation surface in advance, .

For example, Korean Patent No. 10-1665515 discloses "a method and a construction for a seamless perforated steel pipe multistage tunnel without a ground cut" (refer to Figs. 3a, 3b and 3c). The above-mentioned prior art discloses a method for tunneling a tunnel, comprising the steps of: displaying perforation points in a tunnel shape on a ground 10 where a tunnel starts, as registered by the present applicant; Inserting the steel pipes (30) to the rock layer while drilling the drilled holes at the above-mentioned drilled holes; Grouting (40) the ground (10) using the steel pipes (30); Extending the steel pipes (30) to the rear and protruding from the ground (10), and placing the rear ends of the steel pipes (30) on a vertical plane; Installing steel stocks (50) inside the steel pipes (30); And drilling the tunnel by piercing the inner ground 10 of the steel pipes 30. The steel pipes 30 and the steel pipes 30 supported by the steel pipe supports 50, The present invention relates to a method for constructing a multi-stage tunnel construction method of a seamless perforated steel pipe (Claim 1), which is used as a structure of a tunnel shaft portion to prevent collapse or fall of the ground 10 of the tunnel shaft portion and to secure the construction of the tunnel shaft portion, The horizontally installed steel pipes 30 may be extended to the rear of the steel pipe 30 to the opened tunnel by a coupler or the like and the steel pipe supports 50 may be installed under the extended steel pipe 30, A steel pipe multi-stage tunnel method in which the steel pipes 30 supported by the steel pipes 30 are used as a structure of a tunnel shaft to prevent collapse or fall-off of the ground 10 of the tunnel shaft, Structured There is a purpose to do.

However, referring to FIG. 3C, in the case of the conventional art, the thickness of the lining concrete of the tunnel opening section (the tunnel structure section) and the tunnel excavation section should be different by 50 cm and 30 cm, The steel pipe installed on the ground is not supported by the steel pipe, and thus the steel pipe is structurally very unstable.

In addition, the above-described prior art gantry structure is excellent in securing the workability, such as preventing the fall of the shaft portion during the tunnel construction and smoothly entering the equipment, but after the lining concrete is laid, the structural function is lost and the material is wasted There is a problem that the economy is poor.

In addition, steel pipes projected to the outside by connecting couplers or the like when connecting steel pipes projected outwardly are not formed accurately in a tunnel shape in the drilling process, so that they must be constructed in a state where irregular errors are generated. It is difficult to install the steel pipe support in the irregularly shaped steel pipe. Accordingly, the steel pipe support is not integrated with the steel pipe, thereby deteriorating the structural stability.

Patent 1: Korean Patent No. 10-1665515

In order to solve the above problems, the present invention provides a tunnel construction method in which the inner line of the steel pipes inserted into the paperboard coincides with the outer line of the steel support in the tunnel excavation section, thereby dramatically increasing the structural stability of the tunnel shaft portion. .

In addition, by forming the gantry structure without cutting the ground slab, the outer slope of the tunnel shaft is prevented from being cut off, so that the slope is stable and there is no environmental damage. Further slab reinforcement is unnecessary in order to prevent collapse of the slope. The present invention provides a method of constructing a tunnel without slip-off of a slab, which is excellent in workability, such as falling-off of a shaft portion and smooth entry of equipment.

In addition, when the gantry structure is remained, the outside of the gantry structure is pressed and recorded early, so that the vegetation activated by the early greening at the time of completion of the tunnel matches the surrounding landscape. Therefore, .

The present invention also provides a method for constructing a tunnel without cutting a ground surface having excellent economic efficiency by collecting and reusing a gantry structure when collecting the gantry structure.

A method of constructing a tunnel without slabs according to an exemplary embodiment of the present invention includes the steps of inserting a steel pipe into a tunnel at a place where a tunnel starts, And grouting the outside; Cutting or extending the rear portion of the steel tubes to uniformly adjust the length of the rear end portion; Providing a guide beam at a rear end of the steel tubes and coupling the steel tubes with the guide beam; Assembling the gantry structure to the rear portion of the guide beam; Installing a steel support material while excavating a tunnel excavation section in front of the gimlet structure; Placing a lining concrete in the tunnel excavation section and the gimbals structure section; And installing a gantry at the rear of the gantry structure.

The method may further include the steps of assembling the reinforcing net assembly and the shotcrete on the brickwork structure between the step of assembling the brickwork structure and the step of installing the brickwork structure and the step of landscaping and landscaping on the outside of the brickwork structure can do.

In addition, the guide beams form through holes in the abdomen, and the steel pipes are inserted and coupled to the through holes, so that the inner line of the steel pipes coincides with the outer line of the steel support in the tunnel excavation section, .

Further, the gantry structure may include gantry guide beams disposed at a predetermined interval at a rear portion of the guide beam, through holes formed in the web of the gantry guide beam, and gantry steel tubes inserted into the through holes. can do.

A method of constructing a tunnel without slabs according to another exemplary embodiment of the present invention includes the steps of inserting a steel pipe into a tunnel at a place where a tunnel starts, Grouting inside and outside; Cutting or extending the rear portion of the steel tubes to uniformly adjust the length of the rear end portion; Providing a guide beam at a rear end of the steel tubes and coupling the steel tubes with the guide beam; Assembling the gantry structure to the rear portion of the guide beam; Installing a steel plate on the gull structure; Installing a steel support material while excavating a tunnel excavation section in front of the gimlet structure; And pouring the lining concrete into the tunnel excavation section and the gimbals structure section.

Further, after the step of pouring the lining concrete, there is a step of recovering the glen structure; And installing a gantry at a rear portion of the gantry structure section and pressing and landscaping the gantry structure section outside the gantry structure section.

In addition, the guide beams form through holes in the abdomen, and the steel pipe is inserted and coupled to the through holes, so that the inner line of the steel pipes coincides with the outer line of the steel support in the tunnel excavation section, .

The gantry structure may include gantry guide beams disposed at a predetermined interval at a rear portion of the guide beam, grooves formed at predetermined intervals on the outside of the gantry guide beams, and gantry steel tubes inserted into the grooves. can do.

Further, the combination of the gimbals guide beam and the gates of the gates may be a combination of bolts and nuts.

Further, a separating film may be attached to the inner side of the steel plate.

According to the present invention, since the inner line of the steel pipes inserted into the paperboard coincides with the outer line of the steel support in the tunnel excavation section, the structural stability of the tunnel shaft portion is remarkably increased.

In addition, by forming the gantry structure without cutting the ground slab, the outer slope of the tunnel shaft is prevented from being cut off, so that the slope is stable and there is no environmental damage. Further slab reinforcement is unnecessary in order to prevent collapse of the slope. It has an excellent effect on workability such as falling of the shaft portion is prevented and smooth entry of equipment is facilitated.

In addition, when the gantry structure is remained, the outside of the gantry structure is pressed and recorded early, so that the vegetation activated by the early vigor at the time when the tunnel is completed is in harmony with the surrounding landscape.

In addition, when the glenoid structure is recovered, the glenoid structure is recovered and used repeatedly, thereby providing an economical effect.

FIGS. 1A to 1I are views showing steps of a method of constructing a tunnel without slabs according to an embodiment of the present invention.
FIGS. 2A to 2I are views showing steps of a method of constructing a tunnel without slabs according to another embodiment of the present invention.
3 is a drawing of the prior art.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to refer to like elements throughout the drawings, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, May be "connected "," coupled "or" connected ".

Hereinafter, a method of constructing a tunnel without slabs according to an example of the present invention will be described in detail with reference to FIGS. 1 and 2. FIG.

In the following description, the front or back of the tunnel refers to the front in terms of the tunnel excavation direction, and the rear, back, and the like refer to the rear. Outside the outside, such as outside, refers to the outside of the tunnel, and inside, inside, etc. refer to the inside of the tunnel.

1, a method of constructing a tunnel without slabs according to an exemplary embodiment of the present invention includes the steps of inserting steel pipes 20 while drilling or drilling in the form of a tunnel on a ground plate 10 at the beginning of a tunnel, Grouting the inside, outside, or inside and outside of the steel pipe (20) using the openings (20); Cutting or extending the rear portion of the steel pipes 20 to uniformly adjust the length of the rear end portion; Installing a guide beam (22) at a rear end of the steel tubes (20) and coupling the steel tubes (20) with the guide beam (22); Assembling the gate structure (30) to the rear of the guide beam (22); Installing a steel girder (24) while excavating a tunnel excavation section in front of the gimlet structure (30); Placing a lining concrete (40) in a tunnel excavation section and a section of the gimp structure (30); And installing a gantry 50 at the rear of the gantry structure 30.

The step of assembling the reinforcing net (36) and the shotcrete (39) into the gimlet structure (30) between the step of assembling the gimlet structure (30) and the step of installing the steel support , A pressed soil (60) outside the gull structure (30), and landscaping.

Referring to FIG. 1A, in the present embodiment, steel pipes 20 are inserted into a tunnel 10 at a site where a tunnel starts, or pipes 20 are inserted into perforated holes can do. The tunnel shape may be an arch shape, a semicircular shape, or a spherical shape.

The method of inserting the steel pipes 20 while drilling the base sheet 10 may be a straight drilling method in which a bit or the like is provided in front of the steel pipes 20 and the steel pipe 20 is inserted at the same time as the drilling. As described above, when the steel pipe 20 is inserted by the direct drilling method, the steel pipe 20 can be constructed without collapsing the perforation hole up to the soil layer and the rock layer.

Also, it is possible to insert the steel pipe 20 into the cloth tool after drilling differently from the direct drilling method according to the ground condition.

The steel pipes 20 may be inserted into and supported by a soft rock layer (weathered rock) or a carcass layer (blasted rock), thereby enhancing the stability. A plurality of the steel pipes 20 may be connected to each other by a screw, a coupler, or the like in the longitudinal direction according to the depth of insertion. Further, the steel pipes 20 may be connected to each other by a connecting portion such as a concave-convex shape or an annular shape between adjacent steel pipes 20. [ As described above, when the adjacent steel pipes 20 are connected to each other, the bonding strength between the steel pipes 20 is increased, so that the ground reinforcement effect can be enhanced.

Further, the steel pipes 20 can be inserted and then grouted. That is, it is possible to grout the inside of the steel pipes 20, grout the outside of the steel pipes 20, or grout both the inside and the outside of the steel pipes 20. This can be selected in consideration of the condition of the ground in the tunnel shaft portion, the required strength, and the like. When grouting is performed on the inside of the steel pipe 20, the rigidity of the steel pipe 20 is increased. When grouting is performed on the outside of the steel pipe 20, the ground plate 10 and the steel pipe 20 are integrated, .

Referring to FIG. 1B, the step of matching the length of the rear end of the steel pipe 20 with a predetermined length may be performed by cutting the length of the rear end of the steel pipe 20 inserted into the perforated ground, And the rear ends of the steel tubes 20 are positioned on a vertical line. This facilitates coupling of the guide beam 22 and the gantry structure 30 to be described later.

Referring to FIG. 1C, the step of joining the guide beams 22 is a step of installing and joining a guide beam 22 in the form of a tunnel at the rear end of the steel tubes 20. FIG. That is, the structural stability of the steel tubes 20 can be increased by combining the guide beams 22 by welding or the like at the rear end portions of the steel tubes 20 having the uniform lengths, and integrating the steel tubes 20 together.

The guide beam 22 may be any one, but it may be an H beam bent into a tunnel shape. Holes are formed in the abdomen portion of the H beam bent in the tunnel shape, and the steel tubes 20 are installed to be inserted into the through holes of the H beam abdomen, and then they can be joined by welding or the like. By inserting the steel pipes 20 into the abdomen of the guide beam 22 as described above, the inner line of the steel pipes 20 can coincide with the outer line of the steel support members 24 installed in a tunnel excavation section described later. That is, since the steel pipes 20 are supported by the steel support members 24, the stability of the tunnel shaft portion can be drastically increased. A detailed description thereof will be described later.

In the case of the conventional technique (see FIG. 3C), the steel pipes inserted into the ground plate are installed outside the guide beam. When the steel pipes are installed outside the guide beam, the steel pipe and the steel pipes in the tunnel excavation section are spaced apart from each other by a predetermined distance, It has additional structural uneasiness.

Referring to FIG. 1d, the step of assembling and coupling the gimbal structure 30 is a step of assembling and coupling the gimbal structure 30 to the rear portion of the guide beam 22. The gantry structure 30 is provided with tunnel-shaped gantry guide beams 32 having an H beam at regular intervals on the rear portion of the guide beam 22, through-holes are formed in the web of the gantry guide beam 32, After inserting the gangway steel pipes 34 into the through holes, the gangway pipe 34 and the gangway guide beam 32 can be joined together by welding or the like. That is, after the gantry guide beams 32, which are H-shaped beams having a plurality of through holes formed in the webs, are spaced apart from each other at regular intervals and then the gantry steel pipes 34 are inserted into the gantry guide beams 32 And are connected to each other by welding or the like, and the gates 34 can be joined to the steel pipe 20 inserted into the ground plate 10. In this case, the joints of the gates 34 and the steel pipes 20 provided on the base sheet 10 may be welded together or welded together using a coupling tube having a larger diameter, coupled with a coupler, . The gates 34 may be the same as the steel pipes 20 inserted into the ground plate 10, or may be square pipes, reinforcing bars, or the like.

Referring to FIG. 1E, the assembling of the reinforcing net 36 and the casting of the shotcrete 39 are the steps of assembling the reinforcing net 36 to the part of the net structure 30 and casting the shotcrete 39. The reinforcing net 36 may be welded to the inner flange of the gangway guide beams 32 to provide a shotcrete 39. The gangway guide beam 32 and the gangway steel pipe 34 constituting the gangway structure 30 and the reinforcing net 36 and the shotcrete 39 bonded to the gangway guide pipe 32 are integrated with each other, It is possible to prevent the collapse or fall of the ground and to proceed the construction of the main tunnel excavation section stably and promptly. Even if cracks occur in the shotcrete 39 due to the blasting caused by excavation of the main tunnel tunnel excavation section and vibration caused by the blasting, the long lining stability of the tunnel is not affected by constructing the lining concrete 40 later.

Referring to FIG. 1F, the pressurized soil 60 and landscaping step are performed to cover and record the outside of the gull structure 30 integrated with the shotcrete 39. In other words, after performing the cover on the outer side of the gull structure 30, that is, outside the shotcrete 39 surface, landscape watering etc. are planted to perform early recording. At the same time, the outside of the gantry structure (30) is photographed at an early stage, so that the vegetation that is activated at the time when the tunnel is completed is opened, So that the aesthetics around the tunnel shaft portion can be enhanced.

Referring to FIG. 1G, the step of installing the steel material support 24 is a step of installing the steel material support 24 while excavating a main-line tunnel excavation section in front of the gantry structure 30. The H-beam or the like may be used for the steel support 24 in general. The steel support 24 may be installed in contact with the inner surface of the steel pipe 20 inserted in the paperboard 10 as described above. Therefore, the stability of the shaft portion can be remarkably increased. The thickness of the lining concrete 40 required for the section of the gantry structure 30 and the tunnel excavation section is 50 cm and the thickness of the lining concrete 40 is the same as that of the lining concrete 40, 30cm can be adjusted to be effective.

That is, in the case of the prior art (refer to FIG. 3C), a steel pipe inserted into the paper sheet along the outer side of the guide beam is provided to meet the lining concrete thickness of 50 cm required for the gantry structure section and the lining concrete thickness of 30 cm required for the tunnel excavation section In this case, steel reinforcement material in the tunnel excavation section is spaced apart from the steel pipe to be inserted into the ground. Therefore, the structural stability of the tunnel shaft portion may be very weak due to failure of the steel pipe inserted in the paperboard to be supported by the steel support.

1G), the steel pipe 20 to be inserted into the ground plate 10 is installed in the abdomen of the guide beam 22, so that the lining concrete 40 required in the section of the gimlet structure 30 is provided. The steel support member 24 of the tunnel excavation section can be installed in contact with the steel pipe 20 to be inserted into the ground sheet 10 while satisfying the thickness of 50 cm and the thickness 30 cm of the lining concrete 40 required for the tunnel excavation section. Accordingly, the steel pipe 20 inserted in the paperboard 10 is firmly supported on the steel support member 24, so that the structural stability of the tunnel shaft portion can be greatly increased.

In this step, since the steel pipe 20 is already inserted into the soft rock to the light rock and the grouting reinforcement is already performed in the above step, sufficient stability can be ensured even by installing the steel support 24 without additional reinforcement, Can have a shortening effect.

Referring to FIG. 1 H, the step of installing the lining concrete 40 is a step of installing the lining concrete 40 in the section of the gantry structure 30 and the tunnel excavation section. That is, the lining concrete 40 is installed so that the inside of the tunnel is equal to the interior of the tunnel structure 30 and the main tunnel tunnel excavation section in front of the tunnel structure 30, that is, the step is not formed on the surface of the lining concrete 40.

In addition, the lining concrete 40 should have the same inner hole and be formed to have a thickness of 50 cm in the section of the gantry structure 30 and a thickness of 30 cm in the tunnel excavation section. The steel pipe and the steel pipe inserted in the ground plate are spaced apart from each other to compromise the structural stability. In contrast, the present embodiment allows the steel pipe to be inserted into the ground plate 10 while satisfying the required thickness of the lining concrete 40 The steel pipe 20 is supported on the steel support member 24 to increase the structural stability.

In this embodiment, the lining concrete (40) is installed by utilizing the lumber concrete structure (30) as an outer form without being demolished, so that waterproofing and construction joining are unnecessary, the construction period is shortened and the lining concrete So that it is possible to have a quick and easy construction.

Referring to FIG. 1I, the step of installing the gantry 50 refers to a step of installing a gantry 50 at the rear of the gantry structure 30 to finish. That is, the gantry 50 can be installed at the rear of the gantry structure 30 to complete the tunnel construction.

Referring to FIG. 2, a method of constructing a nonwoven fabric 10 according to another exemplary embodiment of the present invention includes the steps of: (a) inserting the steel pipes 20 into the ground sheet 10 at the beginning of the tunnel, Grouting the inside, outside, or inside and outside of the steel pipes 20 using the steel pipes 20; Cutting or extending the rear portion of the steel pipes 20 to uniformly adjust the length of the rear end portion; Installing a guide beam (22) at a rear end of the steel tubes (20) and coupling the steel tubes (20) with the guide beam (22); Assembling the gate structure (30) to the rear of the guide beam (22); Installing a steel plate (38) on the gimlet structure (30); Installing a steel girder (24) while excavating a tunnel excavation section in front of the gimlet structure (30); And pouring the lining concrete 40 into the tunnel excavation section and the section of the gull structure 30.

Further, after the step of pouring the lining concrete (40), there is a step of recovering the grate structure (30); A step of installing a gantry 50 at the rear of the section of the gantry structure 30 and a step of landscaping the pressed gut 60 outside the section of the gantry structure 30.

A step of inserting and grouting the steel pipes 20 of this embodiment, a step of fitting the length of the rear end of the steel pipes 20, a step of joining the steel pipes 20 and the guide beam 22, The step of installing the support material 24, the step of placing the lining concrete 40, the step of pressing the pressed soil 60, the step of landscaping, and the like are the same as those of the above embodiment.

Therefore, the following description focuses on the steps different from the above-described embodiment.

Referring to FIG. 2D, the step of assembling and assembling the gimlet structure 30 is similar to the above-described embodiment. However, the gimlet structure 30 of this embodiment is a structure to be recovered.

That is, the gimlet structure 30 of the present embodiment is provided with gimbal guide beams 32 at regular intervals on the rear portion of the guide beam 22, and a plurality of grooves And the gates 34 are inserted into the grooves.

Assembly of the grate structure 30 may be achieved by joining the grate guide beam 32 and the gates 34 with bolts and nuts and welding as required. That is, after the gates 34 are inserted into the grooves of the gates 34, the gates are welded to each other, or the connecting plate is welded to the outside of the gates 34, (32) with bolt nuts. In the case of joining with the bolt nut, the gantry structure 30 can be easily recovered.

Referring to FIG. 2E, the step of installing the steel plate 38 is a step of installing the steel plate 38 in the section of the gimlet structure 30. That is, the step of joining the steel plate 38 to the inner flange of the gangway guide beam 32 by welding, bolt nut or the like. Therefore, the gantry guide beam 32, the gates 34, and the steel plate 38 are integrally joined to each other to have an excellent rigidity. Therefore, when the tunnel excavation section is excavated, collapse or fall of the shaft portion is prevented, The lining concrete 40 is installed in the inside of the gantry structure 30 even though cracks and defects occur due to the blasting caused by the excavation of the main tunnel tunnel excavation section and the vibration caused thereby and the long term stability of the tunnel is affected Not.

Further, a separation membrane can be attached to the inner side of the steel plate 38. By attaching the separation membrane, the gimlet structure 30 can be easily separated and recovered from the lining concrete 40 in a step to be described later.

Referring to FIG. 2G, the step of pouring the lining concrete 40 is a step of pouring the lining concrete 40 into the tunnel excavation section and the section of the gull structure 30. In the conventional tunnel excavation, the gangway structure 30 is removed as a temporary gang and the unfolded tunnel is formed. Therefore, it is necessary to take measures against watertightness and construction of the connection between the main tunnel tunnel excavation section and the opening tunnel. In this embodiment, It is not necessary to take measures against waterproofing and construction joining by using the lining concrete 40 as an outer form and continuously installing the sections of the gantry structure 30 and the main tunnel tunnel excavation section. Therefore, due to the continuous casting of the lining concrete 40, Construction is easy and construction period can be shortened.

Referring to FIG. 2H, the step of recovering the gimlet structure 30 is a step of recovering the gimlet guide beam 32, the gates 34 and the steel plate 38. Therefore, the gantry guide beam 32, the grate steel pipe 34 and the steel plate 38 made of expensive steel materials can be recovered and used repeatedly in future construction, so that an economical construction can be achieved.

2I, a gantry 50 is installed at the rear of the gantry structure 30, and the gypsum 50 is installed at the rear of the gantry structure 30 in the step of landscaping the pressed soil 60 outside the section of the gantry structure 30, And pressing the pressed soil 60 and the landscape outside the section. That is, the gantry 50 is installed at the rear of the section of the gantry structure 30 that has been recovered, and the pressurized soil 60 is advanced to the outside of the gantry structure 30 section to perform landscaping to record the appearance of the tunnel, .

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all the constituent elements may be constituted or operated selectively in combination with one or more. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Paperboard
20: Steel pipe
22: Guide beam
24: Steel support
30: Gantry structure
32: gantry guide beam
34: Steel pipe
36: Reinforcing mesh
38: Steel plate
39: Shotcrete
40: lining concrete
50: The gates
60: pressed soil

Claims (10)

delete delete delete delete Inserting steel pipes in a tunnel form at the site where the tunnel starts, or grouting the inside, outside, or inside and outside of the steel pipes using the steel pipes;
Cutting or extending the rear portion of the steel tubes to uniformly adjust the length of the rear end portion;
Providing a guide beam at a rear end of the steel tubes and coupling the steel tubes with the guide beam;
Assembling the gantry structure to the rear portion of the guide beam;
Installing a steel plate on the gull structure;
Installing a steel support material while excavating a tunnel excavation section in front of the gimlet structure;
And placing the lining concrete in the tunnel excavation section and the gimbals structure section,
After the step of pouring the lining concrete
Recovering the gull structure;
Installing a gantry at a rear portion of the gantry structure section, and pressing and landscaping the gantry structure section outside the gantry structure section,
The guide beam forms through holes in the abdomen, and the steel pipe is inserted into the through hole,
Wherein the inner line of the steel tubes coincides with the outer line of the steel support in the tunnel excavation section to increase the structural stability.
delete delete The method of claim 5,
Wherein the gimlet structure is provided with gimp guide beams at regular intervals on the rear portion of the guide beam, grooves are formed on the outside of the gimp guide beams at regular intervals, and gum steel pipes are inserted into the grooves, How to construct a tunnel without cutting.
The method of claim 8,
Wherein the combination of the gantry guide beam and the gangway steel tubes is a bolt and nut connection.
The method of claim 5,
And a separation membrane is attached to the inner side of the steel plate.

Images