KR20100132259A - Rock shed tunnel structure as retaining wall and contructing method for such rock shed tunnel structure - Google Patents

Abstract

PURPOSE: A rock shed tunnel for protecting a cut slope, a rock shed tunnel structure, and a construction method thereof are provided to remarkably reduce construction time because the installation of a retaining wall for protecting a slope is not required after cutting a slope. CONSTITUTION: A rock shed tunnel for protecting a cut slope comprises an L-shaped structure(10) and a reversed L-shaped structure(15). The L-shaped structure is installed in a cut slope and is composed of a bottom plate(11) and an inner wall(12). One side of an anchoring unit(101) is installed inside the slope through the inner wall. The reversed L-shaped structure is composed of a top plate(14) and an outer wall(13) and is integrally assembled in the L-shaped structure.

Description

Rock Shed Tunnel Structure as Retaining Wall and Contructing Method for Such Rock Shed Tunnel Structure

The present invention relates to a pit tunnel, a pit tunnel structure and a construction method of the combined use of the cut slope protection structure, specifically, in the construction of the pit tunnel by cutting a part of the slope of the slope, the cut slope protection after cutting the slope By not installing a retaining wall for the wall, the wall of the armed tunnel allows the wall of the retaining wall to function as well, and by enabling the double layered arm tunnel, it minimizes slope cutting and promotes construction efficiency by reducing the soil volume. The present invention relates to a Piam tunnel, a Piam tunnel structure and a construction method thereof that can improve the stability of the Piam tunnel passage.

In the construction of roads by cutting off one side of the slope, the armed tunnel is often installed on the cut slope to protect the road from dangers such as collapse of the slope and falling rocks.

1 and 2 show a schematic longitudinal stage shaving showing a conventional method for constructing a cancerous tunnel. First, as shown in FIG. 1, in order to construct a road on one side of a slope, the width of the road from the base 104 is increased. By setting the slope excavation line 100 to the inside, the cutting to the slope excavation line 100. In order to stabilize the slope in a cut state, general slope protection holes using anchoring fixtures 101, such as anchors and rock bolts, are constructed. After that, a tunnel structure 102 made of concrete is installed in the cut section to construct the arm cancer tunnel. do. In FIG. 2, reference numeral 103 denotes a panel 103 installed for slope protection.

However, in the conventional construction method as described above, first, the tunnel structure 102 may be installed only after the slope protection hole is completed after cutting. That is, after installing the panel or retaining wall for the slope protection, and to construct a tunnel structure 102 that is a separate structure from it. Since the sequential construction of the two separate structures is performed, the air is lengthened as much as it is, and there is a disadvantage in that a large amount of construction costs are required according to performing separate operations.

Second, there is a problem that the amount of slope cut. In the tunnel structure 102, the vehicle must travel in a reciprocating manner, in order to achieve a sufficient width of the tunnel structure, which results in cutting the base plate to a considerably wider width. Therefore, the amount of excavation due to cutting is increased, and for this, a considerable cutting work cost and cutting soil processing cost are consumed, as well as a long working period, and there is a problem that a great damage is applied to the natural environment.

The present invention was developed in order to overcome the limitations of the prior art as described above, and the time required for the construction of the arm-dam tunnel by unifying the slope protection work and the tunnel structure installation work that was composed of separate tasks into one operation The aim is to reduce costs.

In addition, an object of the present invention is to enable the cancer tunnel to be composed of a multi-layer, to minimize the amount of slope cut to achieve cost savings and air savings due to the reduction of earthwork.

In addition, an object of the present invention is to minimize environmental damage due to the construction of the Piam tunnel, to provide a sense of stability for the vehicle passing through the Piam tunnel, and to give an outside view to both the up and down traffic passing vehicles.

In order to achieve the above object, in the present invention, after cutting the base to form a slope cut portion, the N-shaped cross-section structure consisting of a lower plate and the inner wall, the lower plate to the outside and the inner wall toward the cut slope, the An installation step of the N-shaped cross-section structure installed on the slope cutout; To fix the earth pressure of the cut slope by the N-shaped cross-section structure, one side of the anchorage is settled in the cut slope to penetrate the inner wall, and the outer end of the anchorage is fixed to the inner wall, and the rear side of the inner wall Settlement and backfilling of the anchorage backfilling to the cut slope; And a tunnel structure manufacturing step of fabricating an arm-shaped cross-section structure composed of an upper plate and an outer wall integrally with the L-shaped cross-section structure to manufacture the arm-arm tunnel structure.

In the present invention as described above, subsequent to the tunnel structure manufacturing step, the N-shaped cross-section structure is integrally installed on the upper part of the already made Fam tunnel structure, performing the fixing and back filling step of the anchorage, the tunnel structure By performing the manufacturing step, further manufacturing the additional cancer tunnel structure; it can also be to construct the cancer tunnel structure in multiple layers by including.

In addition, in the construction method of the present invention, in the installation step of the N-shaped cross-section structure, the N-shaped cross-section structure is pre-fabricated as a precast concrete member and transported to the site, may be assembled continuously assembled in the longitudinal direction to the slope cut portion,

In the tunnel structure fabrication step, the upper plate and the outer wall of the cross-section structure of each of the L-shaped cross-section is pre-fabricated by the precast member and transported to the site to be combined with each other, forming the L-shaped cross-section structure may be integrally assembled to the cross-sectional cross-section structure. .

In the present invention, as a means for achieving the above object, the base is cut is formed in the slope cut portion formed, consisting of a lower plate and the inner wall, one side of the anchorage through the inner wall is fixed in the cut slope, A c-shaped cross-section structure in which an outer end of the anchorage is fixed to the inner wall, and the back of the inner wall is back-filled to the cut slope, and the earth pressure of the cut slope is supported; A female arm tunnel is provided, comprising a tunnel structure comprising an upper plate and an outer wall and having an U-shaped cross-section structure integrated with the N-shaped cross-section.

In the armed tunnel of the present invention as described above, an additional tunnel structure consisting of an additional N-shaped cross-section structure and an L-shaped cross-section structure is further installed on the tunnel structure consisting of the N-shaped cross-section structure and the L-shaped cross-section structure, and the tunnel structure may be arranged in multiple layers. In addition, the N-shaped cross-sectional structure is made of a precast concrete member, it may be assembled to be continuously arranged in the longitudinal direction cut section.

In particular, in the armed tunnel of the present invention, the upper plate and the outer wall of the L-shaped cross-section structure may each be made of a precast member.

In addition, in the present invention, in order to achieve the above object, the cut section formed by cutting the base plate, the N-shaped cross-section structure consisting of the lower plate and the inner wall is installed; One side of the anchorage penetrates the inner wall so that the earth pressure of the cut slope is supported by the N-shaped cross-section structure, and one side of the anchorage is settled in the cutoff slope, and an outer end of the anchorage is anchored to the inner wall, and to the rear surface of the inner wall. Back fill up to cut slope; An arm-shaped cross-section structure consisting of a top plate and an outer wall is provided with a tunnel structure, characterized in that made of a tunnel structure integrally installed on the cross-section structure.

According to the present invention, since the tunnel structure itself functions as a retaining wall for the slope protection, there is no need to install the slope protection retaining wall or panel after the slope is cut, thereby significantly reducing the time and cost required for the construction of the arm cancer tunnel. Is exerted.

In addition, according to the present invention, it is easy to configure the arm cancer tunnel in a multi-layer, and if the arm cancer tunnel is configured in a multi-layer, it is possible to reduce the width of the arm cancer tunnel, thereby minimizing the amount of slope cut to secure the road width It is possible to reduce the amount of earthwork, it is possible to achieve the effect of reducing the cost and air due to the reduced amount of earthwork.

As such, the amount of slope cut can be minimized, and thus environmental damage due to the construction of the cancer tunnel can be minimized, thereby enabling environment-friendly tunnel construction.

In particular, the arm cancer tunnel can be easily configured in two layers, and if the arm cancer tunnel is formed in two layers, the upper and lower traffic vehicles can be separated during the passage of the tunnel, so that the upper and lower vehicles can be formed in one layer of tunnel. Due to this crossing, the driver's anxiety can be minimized to improve vehicle driving stability, and the up and down traffic can be given the right to view the outside for both.

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

3 to 8 are schematic longitudinal cross-sectional views showing the structure of the arm cancer tunnel according to the present invention and each step of the construction method according to the present invention for constructing them, respectively, and in Fig. 9 the state shown in Fig. 8. A schematic perspective view of the is shown.

First, as shown in FIG. 3, the inclined base is excavated to the planned slope excavation line 100. When forming the arm-tunnel structure 1 in multiple layers as mentioned later, you may cut | disconnect only the excavation width | variety of the original ground only enough to the extent that a vehicle can pass one way. Therefore, the excavation width of the ground can be reduced as compared with the prior art, thereby not only reducing the time and cost required for earthwork, but also minimizing environmental damage.

After digging and cutting the base plate to the slope excavation line 100, as shown in FIG. 4, the c-shaped cross-section structure 10 composed of the lower plate 11 and the inner wall 12 is installed at the slope cutting portion. The N-shaped cross section structure 10 functions as a retaining wall with respect to the cut slope of the slope excavation line 100.

Specifically, after drilling the anchor hole that can be installed anchoring device 101, such as an anchor in the cut slope, the lower plate 11 is facing outwards and the inner wall 12 facing the cut slope 10 Is placed in the cutout. Then, the penetrating opening 101 penetrates into the cut surface and penetrates through the inner wall 12 of the N-shaped cross-sectional structure 10. Specifically, the fixing hole 101 is penetrated through the through hole formed in the inner wall 12 to be inserted into the anchor hole formed in the cut slope, and the outer end of the fixing hole 101 is fixed to the inner wall 12. . Subsequently, the back of the inner wall 12 is back filled to the cut slope. Such N-shaped cross-sectional structure 10 is preferably made of precast concrete member and transported to the site, it is preferable to be continuously assembled and assembled in the longitudinal direction. However, the present invention is not limited thereto, and the N-shaped cross-sectional structure 10 in which the lower plate 11 and the inner wall 12 are integrally formed by the cast-in-place concrete may be manufactured.

 In such a configuration of the present invention, the N-shaped cross-sectional structure 10 itself functions as a retaining wall that supports the earth pressure of the cut slope formed of the slope excavation line 100. Therefore, according to the present invention, it is not necessary to install a separate retaining wall or panel for cutting the cut slope in the height section in which the armed tunnel structure is installed.

Installing the c-shaped cross-section structure 10 on the slope cut portion so that the lower plate 11 faces the outside and the inner wall 12 faces the slope excavation line 100 (installation step of the c-shaped cross-section structure), and fixing the anchorage. And after performing the rear backfilling step, the tunnel structure manufacturing step is subsequently performed. Specifically, as shown in FIG. 5, the arm-shaped cross-sectional structure 15 including the upper plate 14 and the outer wall 13 is assembled to the N-shaped cross-section structure 10 to have the arm-shaped tunnel structure 1 having a box cross section. To form. The cross section structure 15 formed of the upper plate 14 and the outer wall 13 may also be made of precast concrete member and assembled to the cross section structure 10 of the cross section. The upper plate 14 and the outer wall ( 13 is each made of a separate plate, each may be assembled to the N-shaped cross-section structure 10, the upper plate 14 and the outer wall 13 is integrally formed from the beginning to form a cross-sectional structure (15) Afterwards, the one-sided cross-sectional structure 15 consisting of one structure may be assembled to the one-sided cross-sectional structure 10. Of course, the r-shaped cross-section structure 15 may be integrally installed by the cast-in-place concrete to complete the arm cancer tunnel structure 1.

As described above, in the present invention, after excavating the base to the slope excavation line 100, the members (lower plate and the inner wall) constituting the arm cancer tunnel structure 1 itself do not need to install a separate slope protection retaining wall or panel. Function as a retaining wall. Therefore, the construction step is simplified, and the cost and time required to install a separate slope protection retaining wall or panel after cutting the slope can be economical construction.

After constructing the cancerous tunnel structure 1, the upper portion of the cancerous tunnel structure 1 may be covered. However, by the configuration according to the present invention as follows, it is also possible to form a double layer cancer arm tunnel structure.

FIG. 6 shows a state in which an N-shaped cross-section structure 10a is further installed on the lower arm cancer tunnel structure 1 for the construction of the upper arm cancer tunnel structure 1 a subsequent to the state shown in FIG. 5. That is, after completing the lower arm cancer tunnel structure 1, an additional N-shaped cross-sectional structure 10a forming the upper arm cancer tunnel structure 1a is installed. The armed tunnel structure 1a installed on the upper layer also functions as a retaining wall for slope protection. Therefore, after installing the N-shaped cross-sectional structure 10a of the upper layer composed of the lower plate 11 and the inner wall 12, the cutting device 101 such as an anchor is cut through the inner wall 12a as described above. Penetration and fixation in the slope, the end is fixed to the inner wall 12, the back of the inner wall 12 is the back filling up to the slope excavation line (100). At this time, when the slope excavation line 100 is inclined, as shown in the figure, the N-shaped cross-sectional structure 10a of the upper layer is located inward of the armed tunnel structure 1 of the lower layer.

The upper cross-section cross-sectional structure 10a of the upper layer is integrally coupled with the upper plate 14 of the lower arm-mounted tunnel structure 1 already installed. The combination of the lower plate 11 of the upper cross-section structure 10a of the upper layer and the upper plate 14 of the lower armed tunnel structure 1 may use various known methods, for example, the upper plate 14 and Through-holes are formed in the lower plate 11, and both members can be integrally coupled by fastening a known fastening means such as a bolt to the through-holes.

FIG. 7 illustrates a state in which the upper arm cancer tunnel structure 1a is constructed after the state shown in FIG. 6. As shown in FIG. 6, after the upper portion of the N-shaped cross-sectional structure 10a is installed on the lower arm tunnel structure 1, as shown in FIG. 7, the upper plate 14 is formed on the upper-shaped N-shaped cross-sectional structure 10a. And the outer wall 13 are integrally assembled to complete the upper and lower arm tunnel structures 1a. If necessary, the above-described steps may be repeated to further stack the additional armed tunnel structure.

FIG. 8 shows a state in which the upper portion of the upper arm cancer tunnel structure 1a is covered after FIG. 7. 9 shows a schematic perspective view of the state shown in FIG. 8. As shown in the figure, after installing the upper layer of the armed tunnel structure (1a), if necessary, the soil may be covered with a cover 105 above.

As described above, when the cancer tunnel structure is constructed in multiple layers, when the cut slope is inclined, the upper arm cancer tunnel structure 1a is located inward more in the cut slope direction than the lower arm tunnel structure 1, A space having a predetermined width is formed on the upper surface of the underarm tunnel structure 1 below the tunnel structure 1a. Such a space can be utilized as an emergency evacuation space of a tunnel or a storage space of road facilities such as redness, and thus, the space utilization efficiency of the tunnel is further improved. If necessary, a handrail 17 may be provided outside the evacuation space.

As described above, the construction method according to the present invention can be easily installed in the upper and lower layers of the multilayer. In particular, when the cancer tunnel is installed in a double layer, even if the height of the slope drilling line is high, there is an effect that stabilization of the cut ground at the slope drilling line is possible only with the cancer tunnel structure.

In addition, when the cancer arm tunnel is installed in two layers as described above, the traffic can be divided into one-way by dividing the floor of the tunnel, and the vehicle is operated by minimizing the anxiety that the driver feels due to the intersection of the upper and lower vehicles in the tunnel of one floor. It can improve the sense of stability. In addition, if the opening 16 is formed in the outer wall 13 of the armed tunnel structure (1, 1a), it is possible to give a view right to the outside for both up and down traffic vehicles The effect is exerted.

In addition, the above-mentioned double layer arm cancer tunnel structure, compared to the conventional arm cancer tunnel in which both up and down lanes exist in one layer, can reduce the amount of cuts to secure the tunnel width, thereby minimizing environmental damage due to the construction of the arm cancer tunnel. It is possible to construct an eco-friendly tunnel.

1 and 2 is a schematic longitudinal cross-sectional view showing a conventional method for constructing a female arm tunnel.

3 to 8 are schematic longitudinal cross-sectional views showing each step of the construction method according to the present invention for constructing the structure of the arm and the tunnel according to the present invention, respectively.

9 is a schematic perspective view of the state shown in FIG. 8.

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

1: Fiam tunnel structure

10: cross section structure

11: bottom plate

12: inner wall

13: outer wall

14: top plate

15: A cross section structure

Claims (9)

After cutting the base to form a slope cut portion, the N-shaped cross-section structure 10 consisting of a lower plate 11 and the inner wall 12, the lower plate 11 is facing outwards and the inner wall 12 is cut to the cut surface To face, the installation step of the N-shaped cross-section structure 10 to be installed in the slope cutting portion; The one side of the fixing unit 101 is fixed in the cut surface to penetrate the inner wall 12 so that the earth pressure of the cut surface is supported by the N-shaped cross-section structure 10, and the outer end of the fixing unit 101 is in the inner side. Fixing to the wall (12), the back of the inner wall (12) fixing and back filling step of back anchoring to the cut slope; And And a tunnel structure manufacturing step of manufacturing the arm-shaped tunnel structure 1 by assembling and installing the L-shaped cross-section structure 15 having the upper plate 14 and the outer wall 13 integrally with the N-shaped cross-section structure 10. Fam tunnel construction method characterized by. The method of claim 1, Following the tunnel structure manufacturing step, By installing the N-shaped cross-sectional structure 10 integrally on top of the already-made female tunnel structure (1), performing the fixing and back filling step of the fixing device 101, and performing the tunnel structure manufacturing step, And further comprising the step of manufacturing an additional arm tunnel structure (1a). The method according to claim 1 or 2, In the installation step of the N-shaped cross-section structure 10, The cross section structure 10 is a pre-cast concrete member is pre-fabricated and transported to the site, the arm-dam tunnel construction method characterized in that the longitudinally arranged to be continuously arranged in the cut portion. The method according to claim 1 or 2, In the tunnel structure manufacturing step, the upper plate 14 and the outer wall 13 of the L-shaped cross-section structure 15 are each pre-fabricated as a precast member and transported to the site to be bonded to each other, thereby forming the L-shaped cross-section structure 15 The arm construction method, characterized in that the assembly is integrally assembled to the N-shaped cross-section structure (10). The base plate is installed on the cut surface formed by cutting, the bottom plate 11 and the inner wall 12 is formed, through the inner wall 12, one side of the fixing unit 101 is fixed in the cut slope, the The outer end of the fixing unit 101 is fixed to the inner wall 12, the back of the inner wall 12 is filled back to the cut slope, the cross-section structure 10 supported by the earth pressure of the cut slope 10 )and; A female arm tunnel comprising an upper plate (14) and an outer wall (13), the tunnel structure comprising an L-shaped cross-sectional structure (15) integrally assembled to the N-shaped cross-sectional structure (10). The method of claim 5, On top of the tunnel structure consisting of the N-shaped cross-section structure 10 and the L-shaped cross-section structure 15, an additional tunnel structure consisting of an additional N-shaped cross-section structure 10 and an L-shaped cross-section structure 15 is further installed, so that the tunnel structure is formed in multiple layers. A female arm tunnel having a structure arranged. The method according to claim 5 or 6, The N-shaped cross-section structure 10 is made of a precast concrete member, the arm cancer tunnel, characterized in that the assembly is continuously arranged in the longitudinal direction to the cut portion. The method according to claim 5 or 6, The upper plate (14) and the outer wall (13) of the L-shaped cross-section structure 15, respectively, characterized in that the arm of the precast member. An N-shaped cross-section structure 10 composed of a lower plate 11 and an inner wall 12 is provided at a slope cut portion formed by cutting the base plate; One side of the anchorage 101 penetrates through the inner wall 12 so that the earth pressure of the cut slope is supported by the N-shaped cross-section structure 10, and is fixed in the cut slope, and the outer end of the anchor 101 is inner. It is fixed to the wall (12), the back of the inner wall (12) is the back filling up to the cut slope; A U-shaped cross-sectional structure (15) consisting of a top plate 14 and the outer wall (13) is a female tunnel structure, characterized in that made of a tunnel structure integrally installed on the N-shaped cross-section structure (10).

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