KR101018282B1 - Method for constructing fabric for undergound tunnel - Google Patents

Abstract

The present invention relates to a method for installing a structure for underground tunnel formation.

The process of press-ining steel pipe at the position corresponding to the loop of the tunnel scheduled surface, The process of cutting the side surface of the steel pipe, installing the upper waterproof plate and the lower support, and supporting it by earth pressure support to prevent waterproofing and earth leakage. After the installation is completed, the tunnel loop is formed by a grouting process that grouts the out-of-gang space, and then press-in one or more large diameter connecting steel pipes on the lower vertical space predetermined portions of both large diameter steel pipes, and cut the upper and lower large diameter bottom surfaces. And excavating the vertical space to be connected to the lower steel pipe while maintaining the earth wall by the earth plate and the earth pressure support in the downward direction, and installing the waterproof plate to connect the upper steel pipe and the lower steel pipe to the outer wall in the excavated vertical space. , The upper part of the large diameter connecting steel pipe is cut to penetrate the vertical space up and down and form the formwork to ship the rebar. The submerged process, the process of pouring concrete into the interior of the perforated roof steel pipe and the vertical space for the left and right walls to form tunnel loops and side walls, the process of excavating the soil inside the tunnel after concrete curing, and forming the formwork on the bottom surface After the reinforcement is reinforced, the concrete is poured to form the bottom surface to complete the structure, reducing the construction cost by reducing the number of presses of steel pipes, while allowing the inside of the steel pipes pressed in the middle of the vertical space to be used as the work space. It is possible to simultaneously work by dividing the work space, so it is possible to apply a large-scale tunnel construction and to shorten the construction period.

Underground Tunnel, Structure

Description

Installation method for underground tunnel formation {Method for constructing fabric for undergound tunnel}

The present invention is to install the structure for forming underground tunnels to form tunnels by underground tunnel structure by first to install the structure for tunnel formation in the ground without having to excavate the earth and sand of the tunnel excavation in advance and then to excavate the inside of the structure. Regarding,

Particularly, in forming the space for the side wall in the lower part of the underground steel pipe formed by the loop, the underground tunnel formation structure which enables deep excavation by installing the steel pipe for the work space at regular intervals while installing the earth plate for forming the side wall while digging the lower soil. It relates to the installation method.

In order to form an underground tunnel, a tunnel structure is installed to withstand the stress generated from the outside of the tunnel.

Precisely measure the position of steel pipe indentation along the tunnel construction plan before steel pipe indentation, and combine the leading pipe with the earth prevention plate inlet on the large diameter steel pipe tip with diameter of 1m ~ 3m and the indentation direction adjusting device. Steel pipe press position measurement and leading pipe installation process to complete the preparation work,

After fixing the steel pipe to the propulsion position correctly, press it in stages by using hydraulic jack and propulsion auxiliary pipe, perform position measurement every 1M, and construct it in the minimum error range by using the press-fitting direction adjusting device formed in the leading pipe. Steel pipe press process,

Steel pipe reinforcement process to install reinforcement plate and reinforcement frame inside steel pipe to endure earth pressure when cutting steel plate side to install girdle and top plate.

When the steel pipe is pressed in the steel pipe press-in process, the earth prevention plate installation process of digging the surrounding soil through the earth prevention plate inlet formed in the leading pipe and then connecting the earth prevention plate in sequence;

When the installation of the steel pipe pressurization and the earth prevention plate is completed, the grouting injection valve installed in every steel pipe grouts around the earth prevention plate and the steel pipe periphery to prevent the outflow of the earth at the time of the lower part of the steel pipe, as well as to serve as a water order. Out-of-gang grouting process,

When the out-of-gang grout is completed and the steel pipe injection is completed, the process of installing a girdle or beam for cutting the side of the steel pipe to form a pipe insertion hole and transmits the earth pressure to the horizontal,

A side plate forming process for installing a sidewall forming earth plate by cutting a predetermined position where beams or sidewalls are to be installed at both bottom ends, digging soil through the incision surface, and installing a sidewall forming earth plate at a predetermined width;

Formwork installation process in steel pipes to install formwork inside the steel pipe according to the tunnel forming part and structure size,

Reinforcing bar reinforcement step of the reinforcement in the steel pipe and the earth plate for forming the side wall,

Injecting concrete into the steel plate inside the steel plate and the side wall forming earth concrete concrete pouring process on the steel pipe inside and the side wall forming earth plate,

When the concrete injected into the steel plate and the earth plate for forming the side wall is cured, there is a method for installing a structure for underground tunnel formation, which is a tunnel surface excavation process for digging a tunnel surface inside the steel pipe and the side wall.

Forming a vertical shaft from the ground to the construction position of the tunnel vertically; and forming the vertical shaft and pressing the main steel pipe in a vertical direction in the longitudinal direction of the tunnel from the left and right ends of the tunnel using a press-fit means in the vertical shaft. And pressing the sub-steel pipe from one main steel pipe to the other main steel pipe among the pressurized left and right main steel pipes, and forming a space for the tunnel side wall by excavating while maintaining the earth wall downward from the main steel pipe, and the main steel pipe Forming a tunnel side wall by pouring concrete in a space formed downward in the space; and sequentially filling and curing concrete in the other main steel pipe of the main steel pipe sub steel pipe on the one side, and the main steel pipe 110 of the sub steel pipe 120 Internal soil digging process of the tunnel (1) after the internal concrete hardening, tunnel (1) after completion of the earth excavation in the tunnel (1) There is a process how to install an underground tunnel structures for forming configured to install the concrete to shut.

In the conventional tunnel structure installation method described above, the method of press-fitting and connecting the former steel pipe can obtain a solid and stable installation, but the steel pipe having a diameter of 1.5-3 mm is relatively expensive, and the press-fitting method requires considerable technology. There is a problem of excessive installation cost and long construction period,

After the tunnel loop is formed by the latter steel pipe, the vertical space is formed by using the earth wall at both ends, which is an excavation type using the earth wall, which is relatively inexpensive. Therefore, the construction cost is low and the construction period can be shortened. If the length of the space becomes longer, deep excavation due to the increase in pressure of the soil and deterioration of workability is not suitable, and thus there is an unsuitable problem in forming a large tunnel.

The present invention focuses on the problems of the two methods of forming the tunnel structure described above, but the loop of the tunnel is formed in the conventional manner by the press-fitting of the steel pipe, but when the side wall is formed, the steel pipe is press-fitted at a predetermined distance and the space is excavated by the earth plate. By reducing the number of presses of steel pipes, the construction cost is reduced, and the steel pipes are pressed into the middle of the vertical space and used as a work space. Its purpose is to provide a tunnel structure formation method that can be applied simultaneously to the formation of large-scale tunnels and can shorten the construction period.

As a technical means for achieving the above object,

Press-fitting the steel pipe at a position corresponding to the loop of the tunnel plan surface;

After cutting the side of the steel pipe and installing the upper waterproof plate and the lower support, the process of supporting water by earth pressure support to prevent waterproof and earth,

After the installation of the waterproof plate is completed, after forming the tunnel loop by the grouting process to grout in the space outside the gang,

Press-fitting one or more large-diameter connecting steel pipes on a lower vertical space predetermined portion of both large-diameter steel pipes;

Cutting the bottom surface of the upper and lower large diameter and excavating the vertical space to be connected to the lower steel pipe while maintaining the earth wall by the earth plate and the earth pressure support in the lower direction;

Installing a waterproof plate on the outer wall of the excavated vertical space so that the upper steel pipe and the lower steel pipe are connected;

Cutting the upper part of the large diameter connecting steel pipe to penetrate the vertical space up and down and form the formwork to reinforce the reinforcing bar;

Forming tunnel loops and sidewalls by pouring concrete inside the perforated loop steel pipe and the vertical space for the left and right walls;

Excavating soil inside the tunnel after curing concrete,

Forming the form on the floor and reinforcement after reinforcing the concrete provides a method for installing the underground tunnel formation, characterized in that the process consists of forming the bottom surface to complete the structure.

In the method for installing a structure for forming an underground tunnel according to the present invention, in the press-fitting of steel pipes according to the tunnel-planned surface, the steel pipes are press-fitted at intervals at predetermined distances when the sidewalls are formed, and then connected between them by an excavation method using a soil plate. By reducing the number of presses of steel pipes, the construction cost can be reduced, and the inside of the steel pipes pressed in the middle of the vertical space can be used as the work space, allowing simultaneous work by dividing the work space. Yet it is effective to shorten the construction period.

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

First, as shown in FIGS. 1A to 1C, a process of injecting a large diameter steel pipe having a diameter of about 1.5 to 3 m into a position corresponding to a loop of a tunnel predetermined surface is performed.

Here, in order to press the large diameter steel pipe 100 into the ground, a vertical gang is built up to the entrance of the tunnel and a press-fitting means by hydraulic pressure is provided inside the vertical gang to press-fit the line pipe and the steel pipe in which the pressing direction adjusting device is formed, but supply the new steel pipe from the rear side. The steel pipe is press-fitted by the length of the tunnel to form a tunnel by inserting it, and the soil introduced into the steel pipe by the press-fit of the steel pipe 100 is removed to the outside of the steel pipe.

The tunnel loop formed by such a press-fitting and digging method has a steel pipe 100 on the other side of the steel pipe 100 on one side of the large-diameter steel pipe 100, 100 'press-fitted on both sides according to the shape of the loop. ') May be configured in such a way that the small-diameter steel pipes 110, 110' smaller in diameter than the large-diameter steel pipe is pressed in and connected.

As shown in FIG. 1B, a large diameter steel pipe 100 and 100 ′ may be press-fitted in a horizontal “−” shape to be connected to each other.

As shown in FIG. 1C, the large-diameter steel pipes 100 and 100 ′ may be formed by press-fitting in an arc shape, or may be connected to each other by cutting the side surfaces of the steel pipes 100 and 100 ′.

After the above-described loop forming steel pipe press-in process is finished, the side surface of the steel pipe 100 is cut as shown in FIG. 2, and the waterproof plate 120 is installed on the upper part thereof, and the support plate 130 is installed on the lower part to pressurize each other. While supporting the support 140 to perform a process for preventing waterproof and earth.

Here, the side surface of the large-diameter steel pipe 100 is cut, and the waterproof plate 120 is coupled to the upper portion of the cut surface, and the support plate 130 is coupled to the lower portion to support each other by the earth pressure support 140. While preventing, it is possible to prevent the inflow of groundwater leaking from the top.

After the waterproof plate installation is completed, a solid tunnel loop is completed by performing a grouting process of forming the grouting part 150 by performing cement grouting in the out-of-gang space.

After the formation of the tunnel loop as described above, one or more large diameter connecting steel pipes 200 and 200 are formed on the lower vertical space predetermined portions of the large diameter steel pipes 100 and 100 'on both sides as shown in FIG. The step of press-fitting ') is carried out.

Here, the press-in position of the large-diameter steel pipe 200 may be installed at one or more intervals in consideration of the depth of the tunnel side wall to be formed, that is, the vertical space portion 300 of the steel pipe 200 and the steel pipe 200 ' The spacing of the indentation position is appropriate to match the diameter of the large-diameter steel pipe 200, and since the internal space of the steel pipe 200 is utilized as a work space, the number of work can be distributed by the number of indentations, and thus the work speed at the same time. It will have an increasing effect.

After the press-fitting process of the connecting steel pipe as described above, as shown in FIG. 4, the lower surface of each of the large-diameter steel pipes 100, 100 ′, each of the connecting steel pipes 200, 200 ′ is cut out, and through the cut-out thereof, in the lower direction thereof. The process of excavating the vertical space 300 to maintain the earth wall 330 by the earth plate 310 and the earth pressure support 320 supported by the magnetic steel 370 to be connected to the upper portion of the lower steel pipe.

Here, since large diameter steel pipes 100, 100 'and large diameter connecting steel pipes 200, 200' are divided into several places, simultaneous excavation or interconnection work is possible in several places, and thus, work speed is compared with excavation in one place. Can be faster.

After the excavation of the vertical space as described above, the waterproof plate 340 is installed so that the upper steel pipe and the lower steel pipe are connected to the outer wall in the excavated vertical space 700.

Here, the waterproof plate 340 is welded to the iron plate across the front surface of the earth plate 310 of the outer wall between the upper and lower steel pipes to prevent the inflow of leaking water from the earth and sand and the waterproof plate 340 to earth pressure support 320 It is supported by the H-shaped steel 370 by the endurance to earth pressure. The inner wall is to cast concrete in subsequent processes without the need for a separate waterproof plate.

After installing the waterproof plate, the process of cutting the upper part of the large diameter connecting steel pipe (200, 200 ') through the vertical space 300, as shown in Figure 5 and forming the form 350 to reinforce the reinforcement 360 Is carried out.

Here, the formwork 350 is made by the earth wall 330 and the waterproof plate 340, and is formed by separately assembling only within the large diameter steel pipes 100 and 100 'for connection.

After reinforcement, concrete is poured into the perforated roof steel pipe and the left and right vertical spaces to form tunnel loops and sidewalls.

Here, the vertical vertical space excavation process, waterproof plate installation process, formwork and reinforcement process, and concrete placing process to form the sidewall,

In order to maintain the resistance to the upper earth pressure, as shown in FIG. 6, the vertical space 300 formed below the large diameter steel pipes 100 and 100 ′ is separated from the front and rear without being separated from each other in the first vertical space ( 300) (300 ') is formed to be connected to the upper steel pipe upper portion and the first tunnel through the installation process of the waterproof plate, the formwork and reinforcement process, concrete pouring process, and the first vertical space (300) (300') The secondary tunnel side wall is formed by forming the side wall to form the primary load bearing section, and repeating the second vertical space excavation, waterproof plate installation process, formwork and reinforcement process, and concrete casting for other parts where the tunnel side wall is not formed. By forming the first and second tunnel side walls continuously and integrally, it is possible to carry out a safe work in a state where the strength of the upper earth pressure is continuously maintained.

When the concrete is cured by the concrete pouring, the excavation process is carried out to excavate the soil inside the tunnel as shown in FIG. 7, and then, as shown in FIG. 7, form a form on the bottom surface and reinforce the concrete after reinforcement. By forming a surface, a tunnel structure as shown in FIG. 8 is completed.

As described above, in the method of installing the structure for forming an underground tunnel according to the present invention, in press-fitting steel pipes according to the tunnel-planned surface, the steel pipes are press-fitted at intervals at regular distances when the sidewalls are formed and connected between them by an excavation method using a earth plate. By reducing the number of press-fits of steel pipes by reducing the cost of construction, the inside of the steel pipes pressed in the middle of the vertical space can be used as the work space, allowing simultaneous work by dividing the work space. It can be applied, but the construction period can be shortened.

1A to 1C are explanatory views of a large diameter steel pipe propulsion of the tunnel roof surface of the present invention;

   1a is an exemplary embodiment in which both large diameter steel pipes are connected by small diameter steel pipes.

   1b is an exemplary embodiment in which a large diameter steel pipe is press-fitted in a horizontal "-" shape

   1c shows an embodiment in which large diameter steel pipes are press-fitted in an arc shape.

Figure 2 is an explanatory view of the connection of the steel pipe by the waterproof plate of the present invention

Figure 3 is an explanatory drawing of the present invention large diameter connecting steel pipe

Figure 4 is an explanatory view of the vertical space excavation of the present invention large diameter steel pipe and connecting steel pipe

5 is an explanatory view of the reinforcement of the present invention steel pipe and vertical space

6 is a diagram illustrating the first and second division operations of the vertical space of the present invention.

Figure 7 is an explanatory view of the excavation inside the tunnel of the present invention

8 is an explanatory view of formwork and reinforcement of the floor surface in the tunnel of the present invention

9 is a diagram illustrating the final completion of the present invention tunnel structure

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

100,100 ': Large diameter steel pipe 110,110': Small diameter steel pipe

120: waterproof plate 130: support plate

140: earth pressure support 150: grouting portion

160: girder 200,200 ': large diameter connecting steel pipe

300,300 ': Vertical space part 310: Earth plate

320: earth pressure support 330: earth wall

340: waterproof plate 350: formwork

360: reinforcing bar 370: H-shaped steel

Claims (6)

Press-fitting the steel pipe at a position corresponding to the loop of the tunnel plan surface; After cutting the side of the steel pipe and installing the upper waterproof plate and the lower support, the process of supporting water by earth pressure support to prevent waterproof and earth, After the installation of the waterproof plate is completed, after forming the tunnel loop by the grouting process to grout in the space outside the gang, Press-fitting one or more large-diameter connecting steel pipes on a lower vertical space predetermined portion of both large-diameter steel pipes; Cutting the bottom surface of the upper and lower large diameter and excavating the vertical space to be connected to the lower steel pipe while maintaining the earth wall by the earth plate and the earth pressure support in the lower direction; Installing a waterproof plate on the outer wall of the excavated vertical space so that the upper steel pipe and the lower steel pipe are connected; Cutting the upper part of the large diameter connecting steel pipe to penetrate the vertical space up and down and form the formwork to reinforce the reinforcing bar; Forming tunnel loops and sidewalls by pouring concrete inside the perforated loop steel pipe and the vertical space for the left and right walls; Excavating soil inside the tunnel after curing concrete, A method for installing an underground tunnel, characterized in that the form of formwork on the floor and reinforcement after reinforcing the concrete to form the floor to complete the structure. The method of claim 1, When press-fitting the tunnel loop steel pipe, the large diameter steel pipe is pressed into the both sides at the position of the tunnel planned surface loop, and the small-diameter steel pipe smaller in diameter than the large-diameter steel pipe is formed from one steel pipe to the other steel pipe to form a connection. How to install the structure for tunnel formation. The method of claim 1, A method of installing an underground tunnel forming structure, wherein a large diameter steel pipe is press-fitted in a horizontal "-" shape to form a connection at the position of a tunnel predetermined surface loop when the steel pipe for tunnel loop is press-fitted. The method of claim 1, Method of installing underground tunnel forming structure, characterized in that the large diameter steel pipe is press-fitted in an arc shape at the position of the tunnel plan surface loop when press-fitting the tunnel loop steel pipe. The method of claim 4, wherein A method of installing a structure for forming an underground tunnel, characterized in that the arcuate pressurized steel pipe is connected and formed by a girder. The method of claim 1, In forming the sidewalls, The vertical space formed on the lower side of the large-diameter steel pipe is formed to be connected to the upper portion of the lower steel pipe, and the primary vertical space formed to be separated from each other is not separated from the front and rear. The primary tunnel side wall is formed through the reinforcement process and the concrete pouring process to form the primary strength part, and the second vertical space excavation and waterproof plate installation process, formwork and reinforcement reinforcement process for the other parts where the tunnel side wall is not formed. Underground tunnel formation structure installation, characterized in that the secondary tunnel side wall is formed through the repetition of concrete casting, the secondary tunnel side wall is continuously formed integrally so that the strength of the upper earth pressure is continuously maintained. Way.

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