KR101636261B1 - Pipe roof tunnel construction method using guide beam and protrusion-type steel rib which enables pressurization - Google Patents

Abstract

The present invention relates to a steel pipe multistep tunnel construction method using a guide beam, and a protruding steel rib capable of pressurization. The steel pipe multistep tunnel construction method using the guide beam, and the protruding steel rib (50) capable of pressurization comprises: a first step of cutting a tunnel portal (10) in a vertical direction; a second step of installing a tunnel-shaped guide beam (20) in the cut tunnel portal (10); a third step of drilling insertion holes (30) in parallel with a progression direction of the tunnel at regular intervals in a longitudinal direction of the guide beam (20); a fourth step of inserting and installing steel pipes (40) having grouting holes in the insertion holes (30); a fifth step of injecting a grouting material into the steel pipes (40) to grout the steel pipes (40) and the vicinity of the steel pipes (40); and a sixth step of excavating the inside of the tunnel, and installing the steel ribs (50) to support the steel pipes (40). According to the present invention, the tunnel portal (10) of the tunnel is cut in the vertical direction to install the guide beam (20) and drill the insertion holes (30) at regular intervals in the longitudinal direction of the guide beam (20) to improve a drilling precision of the insertion holes (30) to install the steel pipes (40) in the tunnel at regular intervals. Since long distance drilling is able to be performed to reinforce the tunnel using the steel pipes (40) of a sufficient length, a reinforcing effect of the tunnel is increased.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for constructing a steel pipe multi-stage tunnel using a protruding steel support member capable of being pressurized and a guide beam,

The present invention relates to a steel pipe multi-stage tunnel construction method using a press-able protrusion-type steel support and a guide beam.

As shown in FIGS. 1A and 1B, in the case of a tunnel with a shallow tunnel portion or a shallow tunnel, a small diameter or large diameter steel pipe is inserted at an appropriate interval on the outer circumference of a tunnel to be constructed and grouting is performed, And the tunnel was pierced step by step, and the inner surface of the tunnel was supported by a steel support such as H-shaped beam or lattice support to excavate the tunnel.

However, in the above-mentioned prior art, the precision of the perforation for inserting the steel pipe during the installation of the multi-end steel pipe in the outer circumference of the tunnel is deteriorated due to the installation error and the like, and the steel pipes are arranged irregularly The reinforcement effect decreased.

In addition, since it is not possible to drill a long distance in the perforation operation on the outer circumference of the tunnel, there is a limit in the length of the steel pipe which can reinforce the tunnel.

In addition, reinforcing effect was remarkably reduced because the steel pipe and the steel material were separated from each other during construction of the steel pipe support on the inner surface of the tunnel.

In addition, when the inner surface of the tunnel is supported by the steel support, the steel support is constructed with a simple joint structure, so it can not be pressed in the axial direction after the installation, and the steel pipe and the inner surface of the excavated tunnel can not be tightly installed. Therefore, the steel pipe can not firmly support the inner surface of the steel pipe and the excavated tunnel.

Patent 1: Korean Patent No. 10-1233794

In order to solve the above-mentioned problems, according to the present invention, a guide beam is cut by vertically cutting a tunnel mouth portion of a tunnel, and puncturing accuracy of the insertion hole is improved by puncturing the insertion holes at appropriate intervals along the longitudinal direction of the guide beam Since the steel pipes can be installed at regular intervals in the inside of the tunnel, and the tunnel can be reinforced with a sufficient length of steel pipe due to the long hole, it is possible to pressurize the projected steel pipe supporting member, And to provide a multi-tier tunnel construction method.

Also, it is intended to provide a method of constructing a multi-stage steel pipe tunnel by using a protruding steel support member and a guide beam which can pressurize the guide beam to an end portion of the steel pipe to increase the reinforcing effect of the tunnel portion.

Also, since the projections are formed in the steel support to firmly support the steel pipes between the projections of the steel support, the reinforcing effect of the tunnel is enhanced, and the projected steel supports can be pressurized to prevent fall- And to provide a multi-tier tunnel construction method.

Further, by dividing the steel backing material into a plurality of pieces to provide a screw jack at a separate point and / or an end portion of the steel backing material and operating the screw jack to press the steel backing material axially and expanding in the radial direction, The present invention is to provide a method of constructing a steel pipe multi-stage tunnel using a projection beam and a guide beam capable of being pressurized so that a fall-off and excavation is prevented, and the ring closing effect of the tunnel is maximized.

It is also intended to provide a method for constructing a steel pipe multistage tunnel using a projection beam and a guide beam capable of being pressurized so as to prevent clogging of grouting holes caused by stones, sand, or the like when the steel pipe is inserted, by forming the grouting holes of the steel pipe to be inclined rearward .

The present invention also provides a method of constructing a steel pipe multi-stage tunnel using a projection beam and a guide beam capable of being pressurized so as to prevent clogging of a grouting hole by forming a grouting hole of a steel pipe as an endowment.

In addition, by forming a plurality of cutout grooves in the circumferential direction outside the grouting holes of the steel pipe, even if stones are caught in the grouting holes, the grout material can be ejected through the cutout grooves, And a method of constructing a steel pipe multi-stage tunnel using a guide beam.

A method of constructing a multi-tiered steel pipe construction using a press-able protrusion-type steel support and a guide beam according to an embodiment of the present invention is a tunnel construction method comprising: a first step of vertically cutting a gantry part; A second step of installing a tunnel-shaped guide beam on the cut gate portion; (B) puncturing the insertion holes at regular intervals along the longitudinal direction of the guide beam in parallel with the traveling direction of the tunnel; A fourth step of inserting steel tubes having grouting holes formed in the insertion holes; Grouting the periphery of the steel pipe and the steel pipe by injecting a grout material into the steel pipes; And supporting the steel pipes by installing steel supports while excavating the inside of the tunnel.

In the step 6, a part of the steel support members are divided into a plurality of pieces, a screw jack is installed at a separate point and / or an end of the steel support members, and the screw supports are operated to press the steel support members in the axial direction The steel supports extend radially so as to firmly support the steel pipe and the inner surface of the excavated tunnel.

After the step 6, the lower part of the lower steel supporting members is installed on the lower side of the steel supporting members while the lower part of the excavated part inside the tunnel is further excavated in the step 6, and a screw jack And then operating the screw jack to press the steel support and the lower steel support in the axial direction.

In addition, the guide beams may have through holes formed along the center line thereof, the insertion holes may be drilled at the positions of the through holes, and the steel pipes may be inserted into the insertion holes through the through holes.

In some of the steel supports, protrusions are formed between the positions of the steel pipes, and the protrusions can firmly support the steel pipes on both sides.

Further, a screw is formed at an end of the steel pipes, and the nuts are fastened to the screw, so that the guide beam can be firmly coupled to the end of the steel pipes.

Further, the grouting holes may be formed only on the upper half of the steel pipes, and the grouting may be performed mainly on the upper half of the steel pipes.

In addition, the grouting holes may be outer light-tight.

In addition, the grouting holes may have a plurality of cutouts formed on the outer side thereof.

Further, the grouting holes may be inclined rearward.

By inserting the guide beam in the vertical direction of the tunnel mouth of the tunnel and puncturing the inserting holes at appropriate intervals along the longitudinal direction of the guide beam, the puncturing precision of the inserting hole is improved, The tunnel can be installed at regular intervals, and the tunnel can be pierced by a long distance. Thus, the tunnel can be reinforced with a steel pipe having a sufficient length, thereby providing an effect of enhancing the reinforcing effect of the tunnel.

In addition, by firmly coupling the guide beam to the end portions of the steel pipes, it is possible to provide an effect of enhancing the reinforcing effect of the tunnel portion of the tunnel.

Further, by forming the protrusions on the steel support material, the steel pipes are firmly supported between the protrusions of the steel support material, the effect of reinforcing the tunnel is enhanced, and the effect of the fallout and the excrement is prevented.

Further, by dividing the steel backing material into a plurality of pieces to provide a screw jack at a separate point and / or an end portion of the steel backing material and operating the screw jack to press the steel backing material axially and expanding in the radial direction, And it is possible to provide the effect of maximizing the ring closure effect of the tunnel.

Further, by forming the grouting holes of the steel pipe to be inclined rearward, it is possible to prevent the clogging of the grouting holes by the stone, sand or the like when the steel pipe is inserted.

In addition, by forming the grouting hole of the steel pipe with the end of the inner light, clogging of the grouting hole can be prevented.

In addition, by forming a plurality of cutout grooves in the circumferential direction outside the grouting holes of the steel pipe, even if stones are caught in the grouting holes, the grout material can be ejected through the cutout grooves, It is possible to provide a preventive effect.

1A is a longitudinal sectional view showing a state in which a tunnel is constructed using a conventional technique.
Fig. 1B is a cross-sectional view taken along line AA of Fig. 1A.
FIGS. 2A to 2E are flowcharts showing a method of constructing a steel pipe multistage tunnel using a press-able protruding steel support and a guide beam according to an example of the present invention.
3 is a longitudinal sectional view showing a state in which a tunnel is constructed by performing Figs. 2A to 2E. Fig.
Figs. 4 and 5 are cross-sectional views taken along line AA and BB in Fig.
Fig. 6 is a perspective view of Fig. 3. Fig.
7A is a cross-sectional view showing a state in which a grouting hole of a steel pipe of FIG. 6 is formed on steel pipes.
Fig. 7B is a cross-sectional view showing a state in which the grouting holes of the steel pipe of Fig. 6 are formed to be inclined rearward.
Fig. 7C is a cross-sectional view showing a state in which the grouting holes of the steel pipe of Fig.
7D and 7E are a cross-sectional view and a front view showing a state in which a plurality of cut portions are formed outside the grouting hole of the steel pipe of Fig.

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 steel pipe multi-stage tunnel using a press-able projection-type steel material and a guide beam according to an example of the present invention will be described in detail with reference to the drawings.

2A to 2E, a method of constructing a steel pipe multi-step tunnel using a press-able protrusion-like steel support and a guide beam according to an embodiment of the present invention includes a step 1 for cutting the gimlet 10, Step 3 for inserting the steel tubes 40, step 5 for grouting, step 6 for installing the steel supports 50, and so on. do.

The first step of cutting the gates 10 is a step of vertically cutting the gates 10 of the tunnel to be constructed as shown in Fig. 2A.

The second step of installing the guide beam 20 is to install the tunnel-shaped guide beam 20 on the cut gate 10 as shown in FIG. 2B. 3 and 4) of the tunnel-shaped guide beam 20 and the arcuate guide beam 20 are pierced by using the guide beam 20 and the arcuate guide beam 20 as supporting members to improve the accuracy of the insertion hole 30 .

That is, through holes 21 are formed along the center line of the guide beam 20, and the insertion hole 30 is pierced by using the through holes 21 as a support, or the outside of the guide beam 20 is supported by the support And the tunnel can be pierced by a long distance, so that the tunnel can be reinforced with the steel pipe 40 having a sufficient length, so that the reinforcement effect of the tunnel is improved. Increase.

The third step of drilling the insertion holes 30 is to insert the insertion holes 30 along the longitudinal direction (axial direction) of the guide beam 20 at appropriate intervals, It is the stage of drilling. The insertion hole 30 may be formed to coincide with the through hole 21 formed at the center of the guide beam 20 or may be formed at an appropriate interval along the guide beam 20 on the outer side surface of the guide beam 20, .

Step 4 of inserting the steel pipes 40 is a step of inserting the steel pipes 40 having the grouting holes 41 in the insertion holes 30 as shown in FIG. 2C. The steel pipes 40 are installed in an arch shape according to the shape of the insertion holes 30 punctured in the above-mentioned step. The steel pipe 40 is inserted into the insertion holes 30 and then welded to the end of the steel pipe 40 by welding or the steel pipe 40 having the screw 43 formed at the end thereof, The guide beam 20 and the steel pipe 40 are fixed by tightening the guide beam 44 and the guide beam 20 to integrate the steel pipe 40 and the guide beam 20. As a result, 40 constitute a solid structure.

Meanwhile, the grouting holes 41 formed in the steel pipe 40 are formed by controlling the diameter and the interval of the grouting holes 41 in accordance with the ground conditions, etc., and the grout material is radiated through the grouting holes 41 in a step to be described later. The grouting holes 41 may be formed on the entire circumference of the outer circumferential surface of the steel pipe 40, but may be formed only on the outer half of the steel pipe 40 (see Fig. 7A). Here, the outer half refers to a semicircular part located on the outer side of the tunnel when the steel pipe 40 is installed, so that the grouting can be induced mainly toward the outer half of the steel pipes 40 in a step to be described later.

The grouting holes 41 formed in the steel pipe 40 may be formed so that the outside and inside diameters of the grouting holes 41 are constantly perpendicular to each other. However, the grouting holes may be inclined or the outside diameter and the inside diameter of the grouting tool May be formed differently.

For example, the grouting hole 41 may be formed to be inclined toward the rear of the steel pipe 40, that is, toward the tunnel gate 10 side (see FIG. 7B). In this case, the steel pipe 40 is inserted into the insertion hole 30 It is possible to prevent the grouting hole 41 from being clogged by a small stone or soil remaining in the insertion hole 30 when the insertion hole 30 is inserted.

7C). In this case, inflow of sand or stone having a large particle diameter into the grouting hole 41 is prevented, and even if the grouting holes 41 Even if sand or stone having a small particle diameter flows into the inner side of the grouting hole 41, the particle diameter smaller than that of the narrow outside hole of the inner light penetrates, and therefore the grouting hole 41 is not clogged and the grouting material . That is, when the diameter is constant, a phenomenon of irregular-shaped streaking may occur in the middle of the hole, but hardly occurs in the case of staking out the inner light.

7D and 7E). In this case, even if a large sand or a small stone is caught in the grouting hole 41, The grout material is ejected through the portion 411, and sand, stones, and the like sandwiched by the pressure can be released, and consequently clogging of the grouting hole 41 is prevented. The cutout portion 411 may be formed in any of the grouting holes 41 having a constant diameter or the grouting holes 41 having a diameter equal to or less than the inner diameter of the inner lining.

The fifth step of grouting is a step of grouting the periphery of the steel pipe 40 and the steel pipe 40 by injecting grout material into the steel pipes 40. [ Therefore, the grout material is infiltrated to the periphery of the steel pipe 40, so that the ground around the steel pipe 40 and the steel pipe 40 are integrated with each other, so that collapse of the ground can be prevented even if the excavation proceeds at a step 4). At this time, caulking is performed between the inlet of the insertion hole 30 and the steel pipe 40 to prevent the outflow of the grout material to be injected.

Step 6 of installing the steel support members 50 is a step of supporting the steel pipe 40 and the excavated tunnel by installing the steel support members 50 while excavating the inside of the tunnel as shown in FIG. 2D.

Protrusions 51 (see FIGS. 3 and 5) may be formed on the outer side of the steel support member 50 so as to be spaced apart from each other at an appropriate interval so that the steel pipes 40 are positioned between the protrusions 51. Therefore, the steel reinforcing member 50 formed with the protrusions 51 greatly supports the reinforcing effect of the tunnel by supporting the steel pipes 40 on the inside and the both sides.

That is, in the case of the related art, the direction of the steel pipe 40 is not correct and the steel pipe 40 and the steel pipe 50 are separated from each other and the steel pipe 50 can not support the steel pipe 40 properly. Since the steel pipe 40 is not supported in both side directions thereof, that is, in the circumferential direction of the tunnel, lateral flow can occur, and when the tunnel internal ground collapses, the steel pipe 40 also tends or flows together, ) Can not properly support the inside of the excavated tunnel.

However, in the case of the present invention, since the installation direction of the steel pipe 40 is correct and the steel pipe 40 is firmly supported in the radial direction by the steel support member 50 and the steel pipe 40 is supported by the protrusions 51 in the lateral direction, It is possible to stably support the excavated tunnel by being firmly supported also in the axial direction of the steel support material 50. [

The protrusions 51 may be formed on all the steel supports 50 installed in the tunnel, but they may be formed only on some steel supports 50 as required. The projecting portion 51 is not limited to the shape shown in the drawings, and any shape may be used as long as it can stably support the steel pipe 40 in the lateral direction.

Meanwhile, step 6 may include pressing the steel supports 50 in the axial direction. 3 and 5) may be provided on the steel support member 50 and the steel support members 50 may be actuated to press the steel support members 50 in the axial direction, that is, in the longitudinal direction of the steel support member 50 . Accordingly, the steel support members 50 are pushed by the screw jack 60 and expanded in the radial direction so that the arcuate phase is spread outward. Thus, the steel support members 50 are in close contact with the inner surface of the steel pipe 40 and the excavated tunnel Strongly supported. The screw jack 60 can be installed at the end of the steel support 50 or can be installed at a separate point where a plurality of steel supports 50 are separated in the longitudinal direction so as to facilitate the pressing of the steel support 50, , It may be installed at both of the end portions of the steel support 50 and the separated portions. In addition, although all of the steel stocks 50 installed inside the tunnel can be divided into a plurality of parts, only a part of them can be separated into a plurality of screw jacks 60.

In the case of the prior art, the steel support members 50 are designed to simply support the steel pipe 40 and the tunnel ground excavated, and can not apply pressure. Thus, the steel pipe support member 50 can reliably prevent cracks on the tunnel excavation surface, relaxation, collapse, I could not. On the other hand, in the case of the present invention, the steel pipe 40 is expanded in the radial direction by compressing the steel support 50 in the axial direction (longitudinal direction) by the screw jack 60 so that the steel pipe 40 and the tunnel ground, So that it is a very effective technique for preventing or restraining cracks in the tunnel, loosening, collapsing, falling down, etc. of the ground.

In the case of the present invention, the tunnel can be constructed by the steps described above without dividing the tunnel into the upper half and the lower half, and the tunnel is divided into the upper half and the lower half and only the upper half is constructed by the above- It is also possible to completely construct the tunnel by further constructing the lower half of the tunnel.

The construction of the lower half of the tunnel by the second method will be described below.

After step 6 described above, the method may further include a step 7 of installing the lower steel support members 55 while further drilling the lower portion of the excavated part excavated in the above-described step.

In the step 7, as shown in FIG. 2E, the lower steel support members 55 are installed on the lower side of the steel support members 50 while further digging the lower portion of the excavation unit to support the steel support members 50. The lower side steel support material 55 is connected to the lower side of the steel support material 50 provided on the upper side to form a complete arch shape. A screw jack 60 may be provided at a position where the lower steel support member 55 and the steel support member 50 are connected to all or a part of the lower steel support members 55 so that the steel support member 50 and the lower steel support member 55 Can be pressed in the axial direction.

Also in the case of the guide beam 20, a lower guide beam may be additionally provided in the lower half portion. Further, in the second step, the guide beam 20 can be installed in consideration of the lower half portion in advance. In this case, it is not necessary to additionally provide the lower guide beam.

6, the guiding beam 20 is guided to the tunnel gate tunnel 10 by the guiding beam. The guiding beam 50 is guided by the guiding beam 50, And the grouting is performed after the steel pipes 40 are installed at an appropriate interval along the longitudinal direction of the guide beam 20, thereby enhancing the reinforcing effect of the ground before excavation of the tunnel, The steel pipe 40 and the steel pipe support 50 are integrally fastened to each other so that the steel pipe support 40 and the steel pipe support members 50 are tightly supported by the projections 51 and the screw jacks 60, The inner surface of the tunnel can be firmly supported.

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 of 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:
20: guide beam
21: Through hole
30: Insertion ball
40: Steel pipe
41: Grouting hole
411:
43: Screw
44: Nuts
50: Steel support
51: protrusion
55: Lower side steel support
60: Screw jack

Claims (10)

In the tunnel construction method,
A first step of vertically cutting the gates 10;
A step (2) of installing a tunnel-shaped guide beam (20) on the cut gate section (10);
(B) puncturing the insertion holes 30 at regular intervals along the longitudinal direction of the guide beam 20 in parallel to the traveling direction of the tunnel;
A step (4) of inserting steel pipes (40) having grouting holes (41) in the insertion holes (30);
Grouting the periphery of the steel pipe (40) and the steel pipe (40) by injecting a grout material into the steel pipe (40); And
And supporting the steel pipes (40) by installing steel supports (50) while excavating the inside of the tunnel,
The guide beams 20 are formed with through holes 21 along the center line thereof and the insertion holes 30 are drilled at the positions of the through holes 21 and the steel pipes 40 are inserted into the through holes 21 Into the insertion holes 30,
Some of the steel support members 50 are formed with protrusions 51 between the positions of the steel pipes 40. The protrusions 51 firmly support the steel pipes 40 on both sides,
A screw 43 is formed at an end of the steel pipe 40 and a nut 44 is fastened to the screw 43 so that the guide beam 20 is firmly coupled to the end of the steel pipe 40,
Wherein the grouting holes (41) are formed only on the upper half of the steel pipes (40) so that the grouting is performed mainly toward the upper half of the steel pipes (40) Tunnel construction method.
The method according to claim 1,
In step 6, a part of the steel support members 50 are divided into a plurality of parts, and a screw jack 60 is installed at a separate point or end of the steel support members 50, and the screw jack 60 is operated Characterized in that the steel support members (50) are radially expanded to firmly support the steel pipe (40) and the inner surface of the excavated tunnel, including pressing the steel support members (50) axially. Construction Method of Multi - Story Tunnel of Steel Pipes Using Pressurizable Projectile Steel Supports and Guide Beams.
The method according to claim 1,
After step 6,
The lower steel support members 55 are installed on the lower side of the steel support members 50 while the lower portion of the excavated portion inside the tunnel in the step 6 is further drilled, and a part of the lower steel support members 55 is screw- And the step of pressing the steel support member (50) and the lower steel support member (55) in an axial direction by operating the screw jack (60) Construction Method of Steel Tube Multistage Tunnel Using Guide Beam.
delete delete delete delete The method according to claim 1,
Wherein the grouting holes (41) are endowed with an endowment. The steel pipe multi-step tunnel construction method using the press-able projection-like steel support and the guide beam.
The method according to claim 1,
Wherein the grouting holes (41) are formed with a plurality of slits (411) on the outer side thereof.
The method according to claim 1,
Wherein the grouting holes (41) are formed to be inclined rearward. A method of constructing a multi-stage steel pipe tunnel using a pressurizable projection-like steel material and a guide beam.

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