KR102170804B1 - Construction method of underground structure using special guidance pipe - Google Patents

Abstract

The present invention, the first step of pushing the steel pipes to correspond to the shape of the upper slab of the underground structure between the reaching side and the starting side; A second step of coupling one side of the special lead pipes to the oscillation-side ends of the propelled steel pipes; A third step of installing an upper slab of an underground structure to the other side of the special lead pipes; A fourth step of simultaneously pushing the upper slab, the special lead pipes, and the steel pipes toward the arrival side while excavating the ground through the openings formed on the side surfaces of the special lead pipes; It relates to a method of constructing an underground structure using a special lead pipe, characterized in that it is constructed in order, by pushing the steel pipes from the originating side to the reaching side, and combining the special lead pipes with draw devices installed at the starting end of the propelled steel pipes. In the steps of excavating through the opening, connecting the upper slab to the ends of the special lead pipes, and propulsion, the drop of the upper ground is prevented by the draw device during excavation and propulsion, thereby preventing safety accidents from occurring. Construction stability can be increased when constructing an underground structure by the non-cracking method, and by making spaces above the upper slab to fill the space that occurs between the steel pipe and the upper slab, it is possible to prevent construction errors between the steel pipe and the upper slab. By preventing and preventing the disturbance of the surrounding ground, it is possible to provide an effect of preventing the occurrence of ground subsidence.

Description

Construction method of underground structure using special guidance pipe}

The present invention relates to a method of constructing an underground structure using a special lead pipe, and more particularly, to a technology capable of constructing an underground structure in a ground, particularly a rocky ground, using a special lead pipe.

In general, construction methods for constructing tunnels, underpasses, etc. through crossing work under existing roads or railroads include open-breaking construction and non-opening construction. The open ground method is a method of installing a structure after digging the ground from the surface and refilling the soil, and has the advantage of being easy to construct, but there is a problem that the social loss costs increase due to the need to control pedestrians and vehicle operation during the work period. Therefore, in order to solve the above problems, a number of non-cracking methods have been developed that do not occupy an upper road and can install an underground structure while maintaining the toffee.

A representative example of the non-cracking method is the case traction method in which a concrete case is manufactured and then the case is towed to a construction point using a reaction force and a hydraulic jack.

Since the enclosure traction method is pre-fabricated before installing the tunnel structure in the ground, quality control is easier than the method of assembling reinforcing bars inside and under a steel pipe roof and pouring concrete at the site as in the pipe roof method, thus ensuring high quality. There is an advantage that it is possible, and various construction methods have been proposed according to the shape of the pre-pressed steel pipe and whether or not the press-fit steel pipe is extracted.

Korean Patent Registration No. 10-0800028 "Tunnel construction method using the front jacking method" is disclosed as an example of the enclosure towing method. In this prior art, in a method of constructing a tunnel by pressing a concrete tunnel member in the lower ground of a track by a shielding method, a guide consisting of side shafts that forms oscillation bases on both sides of the lower ground of the track and connects the bottom of the oscillation bases on both sides. A tunnel construction method using the front jacking method (refer to claim 1), characterized by improving the mobility of the tunnel member in the ground by constructing a slaughter, and using a PC steel wire while excavating the lower part of a pre-pressed steel pipe roof. It is a method of installing an underground structure at a predetermined location by towing a structure with a front jack).

This front jacking method is a method of pressing a steel pipe outside the planned tunnel and pulling the externally manufactured enclosure to the inside of the pressed steel pipe structure.Since the concrete enclosure is manufactured in advance, quality control of the enclosure is easy and the concrete forming the enclosure is already Since the predetermined strength has been reached, there is an advantage of securing the safety of the structure and workers during tunnel construction.

However, in the front jacking method, the ground is disturbed as much as the gap caused by the construction error generated when the steel pipe is pressed into the outer circumferential surface of the case when the case is towed.Therefore, there is a risk of subsidence in the upper road or obstacles, and the pressed steel pipe is buried and cannot be recycled. There is a problem that the construction cost increases. In addition, there is a problem that is difficult to apply in the case of rocky ground.

Therefore, technology development of an underground structure construction method using a non-cracking method that can be usefully applied to rocky ground and has excellent constructability, stability, and economy is required.

Patent 1: Korean Patent Registration No. 10-0800028

In order to solve the above-described problem, the present invention propels the steel pipes between the launch side and the arrival side, combines the special lead pipes with a draw device installed at the starting end of the propelled steel pipes, and excavates the ground through the openings of the special lead pipes. By simultaneously promoting the upper slab of the underground structure, the special lead pipes and steel pipes, the work is quick and the upper slab is promoted to all ground, including rock mass, to provide an underground structure construction method using a special lead pipe that can construct the underground structure. .

In addition, it is intended to provide a method of constructing an underground structure using a special lead pipe, which is easy to excavate the ground and at the same time, it is efficient to propel the upper slab by preventing the fall of the upper ground by the draw device when the ground is excavated using a special lead pipe.

In addition, by providing a space above the upper slab, a gap between the steel pipe and the upper slab is eliminated to provide a method of constructing an underground structure using a special lead pipe that can prevent disturbance or subsidence of the upper ground.

In addition, it is intended to provide an underground structure construction method using special lead pipes that can increase economic efficiency by recovering and recycling steel pipes, special lead pipes, and upper slabs from the originating side to the arrival side after completing the promotion of the steel pipes, special lead pipes and upper slabs.

A method of constructing an underground structure using a special lead pipe according to an example of the present invention comprises: a first step of pushing the steel pipes to correspond to the shape of the upper slab of the underground structure between the reaching side and the starting side; A second step of coupling one side of the special lead pipes to the oscillation-side ends of the propelled steel pipes; A third step of installing an upper slab of an underground structure to the other side of the special lead pipes; A fourth step of pushing the upper slab while excavating the ground through the openings formed on the side surfaces of the special lead pipes, thereby simultaneously pushing the upper slab, the special lead pipes, and the steel pipes toward the arrival side; It can be characterized in that it is constructed in order.

In addition, it may further include a steel pipe multi-stage reinforcing step of supporting both sides of the upper slab propelled toward the reaching side.

In addition, it may further include the step of constructing the side wall and the lower slab by excavating the lower side of the upper slab propelled toward the reaching side.

In addition, the step of manufacturing spaces that are installed on the upper side of the upper slab to fill the space occurring between the upper side of the upper slab and the steel pipe, wherein the step of producing the spaces is vertical so that a part of the upper slab is buried. It is characterized in that the reinforcing bars to be installed are installed, an arc-shaped formwork and an injection pipe are installed to allow the space to be formed, and concrete is injected between the upper surface of the upper slab and the formwork through the injection pipe. I can.

In addition, it includes a draw device installed between the upper side of the opening and between the adjacent special lead conduit to prevent the upper ground from falling, and the draw device includes a lower draw unit coupled to both sides or one side of the adjacent special lead conduit. And an upper draw installed on the upper side of the lower draw and slidably coupled to the lower draw.

In addition, in the fourth step, the upper draw is gradually slid in the direction of the reaching side according to the degree of excavation of the ground through the opening, and then the upper slab is pushed and the special lead conduit is promoted accordingly, and the special lead conduit is It may be characterized in that the combined lower draw is slidingly moved to the lower side of the upper draw.

In addition, the upper draw may include a flat plate portion and a refractive portion refracted from both sides of the flat plate portion toward an upper side of the side of the special lead tube.

In addition, it may include a guide angle of an a-shaped shape that is coupled to the side surface of the special lead pipe while surrounding the bent portion to allow the upper draw to slide.

Through the present invention, the steel pipes are propelled between the starting side and the reaching side, and after combining the special lead pipes with a draw device installed at the ends of the starting side of the propelled steel pipes, excavating the ground through the openings of the special lead pipes, the upper slab and the special ship of the underground structure By simultaneously pushing the conduit and steel pipes, the work is quick and the upper slab can be pushed to all grounds including rock mass to construct an underground structure.

In addition, when the ground is excavated using a special lead pipe, the drop of the upper ground by the draw device is prevented, so that the ground excavation is easy and the propulsion of the upper slab is efficient.

In addition, by providing a space above the upper slab, a void between the steel pipe and the upper slab is eliminated, thereby preventing disturbance or settlement of the upper ground.

In addition, economic efficiency can be increased by recovering and recycling the steel pipes, special lead pipes, and upper slabs from the originating side to the arrival side after completing the promotion.

1A to 1H are diagrams showing a construction sequence of an underground structure construction method using a special lead pipe according to an example of the present invention.
2 is a perspective view showing an underground structure construction method using a special lead pipe according to an example of the present invention.
3 is an exploded perspective view of an underground structure construction method using a special lead pipe according to an example of the present invention.
4A to 4C are cross-sectional views and side views showing a state in which an upper slab, a special lead pipe, and a steel pipe are simultaneously propelled while excavating the ground using a special lead pipe in the method of constructing an underground structure using a special lead pipe according to an example of the present invention.
5A to 5F are perspective views showing a state in which an upper slab, a special lead pipe, and a steel pipe are simultaneously propelled while excavating the ground using a special lead pipe in the method of constructing an underground structure using a special lead pipe according to an example of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, when it is determined that a detailed description of a related known configuration or function interferes with an understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the constituent elements of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but another component between each component May be “connected”, “coupled” or “connected”.

Hereinafter, a method of constructing an underground structure using a special lead pipe according to an example of the present invention will be described in detail with reference to FIGS. 1 to 5.

A method of constructing an underground structure using a special lead pipe according to an example of the present invention includes: a first step of pushing the steel pipes 10 to correspond to the shape of the upper slab 30 of the underground structure between the reaching side and the starting side; A second step of coupling one side of the special lead pipes 20 to the oscillation side ends of the propelled steel pipes 10; A third step of installing the upper slab 30 of the underground structure to the other side of the special lead pipes 20; By pushing the upper slab 30 while excavating the ground through the openings 22 formed on the side surfaces of the special lead pipes 20, the upper slab 30, the special lead pipes 20, and the steel pipes 10 are simultaneously Four steps of propulsion toward the reaching side; It can be installed in order.

This embodiment is a method of constructing an underground structure under a public road. This embodiment is also possible in the soil, but can be particularly usefully applied to the rocky ground. In addition, it is applicable even when some of the rocky ground is sediment.

The first step is a step of pushing the steel pipes 10. The steel pipe 10 can be pushed to correspond to the shape of the upper slab 30 of the underground structure between the reaching side and the starting side. Since the upper slab 30 of the underground structure is usually constructed in a flat plate shape, the propulsion of the steel pipes 10 in the first step may correspond to the shape of the upper slab 30, that is, a flat plate shape.

The propulsion of the steel pipe 10 may be propelled from the arrival side to the start side or from the start side to the arrival side. This can change the direction of propulsion according to the construction environment. In this embodiment, the propulsion of the steel pipe 10 will be described centering on a method of propulsion from the arrival side to the start side. This method can efficiently perform the operation by changing the propulsion position of the steel pipe 10 and the upper slab 30.

The propulsion of the steel pipe 10 may promote the steel pipe 10 while excavating by manpower within the steel pipe 10 when the ground is soil or weathered rock. In addition, when the ground is rock, the steel pipe 10 may be propelled through mechanical excavation such as a shield.

The second step is a step of coupling one side of the special lead pipes 20 to the oscillation-side end portions of the propelled steel pipes 10. That is, the second step is a step of preparing the propulsion of the upper slab 30 by combining the special lead conduit 20 manufactured in advance at the oscillation side end of the propelled steel pipes 10 by welding or the like.

An opening 22 may be formed on one side of the special lead conduit 20. The opening 22 is a configuration for excavating the ground on the side during the propelling of the special lead pipes 20.

A draw device may be installed between the special lead conduit 20 adjacent to the upper side of the opening 22 of the special lead conduit 20. The draw device includes a lower draw 24 coupled to both sides or one side of the adjacent special lead pipes 20, and an upper draw installed on the upper side of the lower draw 24 and coupled to the lower draw 24 in a sliding manner. (26) may be included.

The lower draw 24 may be coupled between the special lead pipes 20 by welding or the like. That is, the lower draw 24 may be welded to both sides of the special lead pipe 20, or may be welded to either side. When both sides are welded, it may be disadvantageous if the distance between the two special lead pipes 20 is changed during the propulsion of the special lead pipe 20. In the case of welding only to the special lead pipe 20 on either side, it can be well adapted even when the spacing between the two special lead pipes 20 is slightly different.

A draw guide angle may be installed between the lower draw 24 and the upper draw 26. The draw guide angle is provided in which a plurality of angles of a shape are installed to correspond to each other on the lower side of the upper draw 26 and the upper side of the lower draw 24, so that the separation of the upper draw 26 is prevented and the sliding movement is possible. I can.

The upper draw 26 may include a flat plate portion 262 and a refracting portion 264 refracted from both sides of the flat plate portion 262 toward the upper side of the side of the special lead conduit 20. That is, both ends of the upper draw 26 include the bent portions 264 in contact with the outer surface of the special lead conduit 20, so that the special lead conduit 20 can be closely contacted and slidably moved.

The upper draw 26 may be slidably coupled to the special lead conduit 20 by a guide angle 28 of an a-shaped shape. The a-shaped guide angle 28 may be coupled to the side of the special lead tube 20 by welding or the like while surrounding the bent portion 264 of the upper draw 26. By the guide angle 28, the upper draw 26 may be capable of sliding movement without being separated between the special lead conduits 20. In addition, the refraction part 264 refracted in the upper side of the side of the special lead pipe 20 and the guide angle 28 surrounding the refraction part 264 prevents the inflow of soil into the guide angle 28, thereby preventing the upper draw 26 ) Can be easily sliding.

The draw device facilitates excavation by preventing the fall of soil or rocks on the upper ground, and enables sliding propulsion of the upper slab 30.

Step 3 is a step of installing the upper slab 30 of the underground structure to the other side of the special lead pipes 20. The upper slab 30 may be installed by transporting a pre-fabricated one, or may be directly manufactured at the site by pouring concrete from the starting side. The upper slab 30 is installed so as to coincide with the excavation position of the special lead pipe 20, and is installed so as to be propelled in the direction of the excavation position.

In step 4, by pushing the upper slab 30 while excavating the ground through the openings 22 formed on the sides of the special lead pipes 20, the upper slab 30 and the special lead pipes 20 and the steel pipes 10 At the same time, it is a step of pushing in the direction of the arrival side. Propelling while excavating the ground can be said to mean propelling after excavating a certain part and then propelling after excavating a certain part. In this step, by excavating the ground through the openings 22 formed on the sides of the special lead pipes 20 and then pushing the upper slab 30, the upper slab 30, the special lead pipes 20 and the steel pipes 10 They can be pushed in the direction of arrival at the same time.

In this step, the upper draw 26 of the draw device is gradually slid in the direction of the reaching side according to the degree of excavation of the ground, and then the special lead pipe 20 and the steel pipe 10 are promoted when pushing the upper slab 30. And, the lower draw 24 coupled to the special lead pipe 20 can be slid to the lower side of the upper draw 26 stopped by the ground. Therefore, by pushing the upper slab 30, the upper slab 30, the special lead pipe 20, and the steel pipe 10 are simultaneously propelled to facilitate rapid propulsion, and the upper drawer 26 and the lower draw 24 The upper slab 30 can be easily promoted because the soil or rocks of the ground do not fall from there.

This embodiment may further include the step of manufacturing the spaces 40. In this step, spaces 40 may be installed on the upper side of the upper slab 30 to fill the space generated between the upper side of the upper slab 30 and the steel pipe 10. That is, by filling the space between the propelled steel pipe 10 and the upper slab 30 by the space 40, it is possible to prevent the surrounding ground, especially the upper ground, from being disturbed or settled.

The step of manufacturing the spaces 40 includes an arc-shaped formwork 42 that vertically installs reinforcing bars so that a part of the upper slab 30 is buried, and allows the space 40 to be formed to cover the reinforcing bars. An injection pipe 44 for injecting concrete into the formwork 42 may be installed, and concrete may be injected between the upper surface of the upper slab 30 and the formwork 42 through the injection pipe 44. The space 40 may be manufactured together when the upper slab 30 is manufactured, or may be manufactured on-site before the upper slab 30 is promoted.

After the step 4, it may further include a step of reinforcing multi-stage steel pipes. The steel pipe multi-stage reinforcement step is reinforced to support both sides of the upper slab 30 propelled toward the reaching side, so that the lower excavation of the upper slab 30 can be safely performed.

This embodiment may further include the step of constructing the sidewall and the lower slab. This step is a step of constructing an underground structure by excavating the lower side of the upper slab 30 after performing the multi-stage reinforcement step of the steel pipe and installing the side wall and the lower slab.

This step may include a process of reinforcing the ground by installing rock bolts on the ground while excavating the lower part of the upper slab 30, and preventing the collapse of the ground by placing shotcrete on the wall.

Before installing the sidewall and the lower slab, a column may be first installed below the center of the upper slab 30. As for the pillar, the lower part of the upper slab 30 is excavated in a V-shape, and the pillar is first installed to support the upper slab 30, and then the above-described lower excavation and construction of the sidewall and the lower slab may be performed. This enables the installation of the side wall and the lower slab to be carried out in a safe state by first supporting the center of the upper slab 30.

In the present embodiment, the tentative facilities of the reaching side and the oscillation side, H piles, etc. can be removed by cutting the steel pipe 10 by welding before propulsion.

In the above, even if all the constituent elements constituting an embodiment of the present invention are described as being combined into one or operating in combination, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all the constituent elements may be configured or operated by selectively combining one or more. In addition, terms such as "include", "consist of" or "have" described above mean that the corresponding component may be present unless otherwise stated, excluding other components Rather, it should be interpreted as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art, unless otherwise defined. Terms generally used, such as terms defined in the dictionary, should be interpreted as being consistent with the meaning of the context of the related technology, and are not interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, 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 interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

10: steel pipe
20: special lead conduit
22: opening
24: lower draw
26: upper draw
262: flat plate
264: refraction
28: guide angle
30: upper slab
40: space
42: arc-shaped formwork
44: injection tube

Claims (8)

A first step of pushing the steel pipes between the reaching side and the starting side to correspond to the shape of the upper slab of the underground structure;
A second step of coupling one side of the special lead pipes to the oscillation-side ends of the propelled steel pipes;
A third step of installing an upper slab of an underground structure to the other side of the special lead pipes;
A fourth step of pushing the upper slab while excavating the ground through the openings formed on the side surfaces of the special lead pipes, thereby simultaneously pushing the upper slab, the special lead pipes, and the steel pipes toward the arrival side; In order,
It includes a draw device installed between the upper side of the opening and between the neighboring special wire conduit to prevent the upper ground from falling,
The draw device is a special ship, characterized in that it comprises a lower draw coupled to both sides or one side of the adjacent special lead pipe, and an upper draw installed on the upper side of the lower draw and coupled to the lower draw so as to be slidably coupled to the lower draw. Construction method of underground structures using conduit The method according to claim 1,
A method for constructing an underground structure using a special lead pipe, characterized in that it further comprises a step of reinforcing multi-stage steel pipes supporting both sides of the upper slab propelled toward the reaching side. The method according to claim 1,
Construction method of an underground structure using a special lead pipe, characterized in that it further comprises the step of constructing a side wall and a lower slab by excavating a lower side of the upper slab propelled toward the reaching side. The method according to claim 1,
Further comprising the step of producing spaces installed on the upper side of the upper slab to fill the space occurring between the upper side of the upper slab and the steel pipe,
The step of manufacturing the spaces includes installing reinforcing bars vertically installed so that a part of the upper slab is buried, installing an arc-shaped formwork and an injection pipe to form the space, and the injection pipe. An underground structure construction method using a special lead pipe, characterized in that concrete is injected between the upper surface of the upper slab and the formwork. delete The method according to claim 1,
In the fourth step, after the upper draw is gradually slid in the direction of arrival according to the degree of excavation of the ground through the opening, the upper slab is pushed and the special lead conduit is propelled accordingly, and the special lead conduit is coupled. A method for constructing an underground structure using a special lead pipe, characterized in that the lower draw is slid to the lower side of the upper draw The method according to claim 1,
The upper draw is a method of constructing an underground structure using a special lead pipe, characterized in that the upper draw includes a flat plate portion and a refractive portion refracted from both sides of the plate portion toward the side of the special lead pipe. The method of claim 7,
A method of constructing an underground structure using a special lead pipe, characterized in that it comprises a guide angle of a shape that is coupled to a side surface of the special lead pipe while surrounding the bend to allow the upper draw to slide.

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