KR20090105548A - Cut and Cover Tunnels by useing CSP and Geotextile and the Construction Method thereof - Google Patents

Abstract

PURPOSE: A cover tunnel using corrugated steel pipe and geotextile and a construction method thereof are provided to reduce the load and pressure applied on the side and top of the corrugated steel pipe structure and to reinforce the right and left slope surface of the cover tunnel by employing geotextile pocket type filling method and EPS block. CONSTITUTION: A cover tunnel(1) using corrugated steel pipe and geotextile comprises a corrugated steel pipe structure(10), a concrete pocket(20), a side banking part(30), and a top banking part(50). The corrugated steel pipe structure is installed on a road(5). The concrete pocket is installed on either side of the corrugated steel pipe structure. The side banking part is located above the concrete pocket. The top banking part is made up of multi-stage pocket type banking structure using geotextile and positioned above the side banking part and the corrugated steel pipe structure.

Description

Cut and Cover Tunnels by useing CSP and Geotextile and the Construction Method

The present invention relates to a ventilated tunnel and a construction method thereof, and more particularly, to form a tunnel structure using a corrugated steel pipe structure, and to apply efficiency and economic efficiency by applying a pocket landfill method using geotextiles when covered. The present invention relates to an open tunnel using corrugated steel pipes and geotextiles, and a construction method thereof.

In general, the open tunnel method is applied to the tunnel construction-related open cut and then re-filled to form an original ground that is close to the natural state, and is widely used in tunnel sites suitable for constructing eco-friendly tunnels and securing eco-mobile passages. Is one of. That is, as shown in Figure 1 by excavating the ground from the ground surface and the tunnel structure 200 after the construction of the top by restoring the ground state of the original state by laying the top, mountain tunnel, urban subway, public areas, underground roads It is widely applied in the construction of underground walkways, water supply and sewerage systems, and power communication districts.

Such a conventional method of mounting is a method of installing and refilling the structure after excavating the ground, the drilling depth is widely constructed as the most economical method in the range of about 15 to 20m. Types of installation methods include excavation only by excavation, non-removal method (damping method) to install mud wall along with excavation, and reclamation type to install perforated plate on mud ball (water and sewage pipe, tunnel, subway construction) It is a method often used on the back.

In addition, according to the shape of the excavation surface is divided into slope slope attachment method to stabilize the natural slope and earth wall type attachment method to prevent the collapse of the soil by installing the support ball, such as retaining wall, brace, strip.

When applying the opening method, most of the structures are used in the construction of the cover tunnel, which can secure the stability of the structure by the resistance of earth pressure and water pressure according to the strength of the concrete itself. However, formwork, reinforcement, Due to the construction step by step in the order of concrete pouring, there is a disadvantage in the required construction period because of the constraint that the next construction process can not proceed until the concrete is exhibited a certain strength. In addition, when the depth of penetration is shallow, the allowable resistive force is required to be significantly lower than the concrete strength, and because the alternative method is extremely limited, using the box-shaped concrete may increase the construction cost. In addition, since such box-type concrete is manufactured in a rectangular form for most of construction reasons, the earth pressure and hydraulic pressure are directly transmitted structurally after construction, so the necessity of maintenance and reinforcement is emerging.

In addition, most of the structure of the tunnel applied to the conventional mounting method is designed in the form of a box (Box Form) so that the structure receives the load and lateral earth pressure as it is, the wall must be installed very thick. Therefore, it has limitations such as limiting the amount of concrete pouring on site, increasing construction cost, and securing road margin.

In other words, the box-type concrete used in the conventional cover tunnel has its own resistance to earth pressure or hydraulic pressure when its strength is exerted, but structurally, maintenance difficulties occur in the long term due to concentration of load and side pressure.

In order to solve this problem, in recent years, the tunnel structure is formed in an arch shape to be structurally advantageous in cross section, thereby greatly reducing the thickness of the structure and reducing construction costs due to factory production and transportation of the tunnel structure, but still in the upper part of the tunnel There are limitations such as the problem of reducing the load on the load and the countermeasure against side pressure.

In addition, various types of open tunnel methods are being developed, and there are typical methods using corrugated steel sheets. Corrugated steel sheet is a steel plate that forms corrugated bone on thin ductile steel sheet and has increased resistance to load. Its cross section coefficient is 10 ~ 30 times higher than that of general steel sheet. Steel plate. When the corrugated steel sheet is intended to be constructed in the cover tunnel, first, it is made in the order of the excavation work → foundation concrete casting → corrugated steel sheet structure assembly → fill.

The main use of corrugated steel sheet is used in the vent tunnel, ramen bridge, waterway, storage facility. However, when the corrugated steel sheet is used for the cover tunnel, concrete lining treatment should be performed in consideration of the effects of the loading load and the side pressure, and the cost of this increases the additional construction cost rather than the single cost of the corrugated steel sheet. have. Therefore, there is a structural stability when constructing the arched cover tunnel with corrugated steel sheet, but there is a disadvantage in that additional construction cost such as concrete lining treatment occurs during construction.

The present invention is to solve the conventional problems as described above, the purpose of which is structurally superior to the general box-shaped structure in the construction of the open tunnel by the opening method, it is cheaper than the concrete tunnel structure and light weight arch-shaped corrugated steel pipe By applying geotextile pocket embankment method and EPS block for load reduction, corrugated steel pipe can reduce the load on the corrugated steel pipe side and top, reduce lateral pressure, reinforcement effect on the left and right slopes of abdominal tunnel, and shorten construction period. The present invention is to provide a tunnel tunnel using geotextile and its construction method.

And another object of the present invention is to form an arcuate structure using a thinner and cheaper corrugated steel pipe than corrugated steel sheet, and to minimize the load and lateral pressure, such as pocket type earthwork and EPS ( Expanded Poly-Styrene) blocks the construction cost and the construction period, and provides a corrugated steel pipe and a geotextile using the corrugated steel pipe and geotextile that can be used to secure free space on the road.

In order to achieve the above object, the present invention, in the open tunnel made by excavating the ground,

Corrugated steel pipe structure installed on the roadway;

Concrete pockets respectively installed on both sides of the corrugated steel pipe structure;

A lateral fill portion located above the concrete pocket; And

And an upper fill portion positioned on an upper side of the lateral fill portion and the corrugated steel pipe structure, wherein the fill portion comprises a multi-stage pocket type fill structure using geotextiles. to provide.

In another aspect, the present invention preferably provides a corrugated steel pipe and a corrugated steel tunnel using a geotextile, characterized in that the base concrete portion is installed on each of the lower sides of the lower.

In another aspect, the present invention preferably provides a corrugated steel structure and a corrugated steel structure and geotextile is wrapped around the outer surface of the geotextile is configured to prevent the inflow of repair and fill material into the interior of the corrugated steel pipe structure do.

In another aspect, the present invention preferably provides a corrugated steel pipe and a cover tunnel using a geotextile, characterized in that the geotextile covered on its outer surface is extended to form the basis of the concrete pocket.

And the present invention preferably provides a corrugated steel pipe and a geotextile using the corrugated steel pipe, characterized in that extending the 3m to both sides of the corrugated steel pipe structure.

In another aspect, the present invention preferably provides a corrugated steel pipe and a geo-textile, characterized in that the concrete pocket is formed in each end of the drain hole.

And the present invention preferably the side fill portion is multi-stage construction up to the upper end of the corrugated steel pipe structure, each of the multi-stage pocket type fill structure using a geotextile having a fill height of 1m each, characterized in that the cover using a corrugated steel pipe and geotextile Provide a tunnel.

In addition, the present invention preferably the lateral fill portion is a corrugated steel pipe and geotextiles, characterized in that the construction of the reinforcement soil block or vegetation bag for preventing the loss of road and the aesthetics of the fill material at each end of the corrugated steel pipe structure, respectively to provide.

The present invention preferably provides a corrugated steel pipe and a geotextile using a corrugated steel pipe and a geotextile, wherein the side fill section is formed of a drainage layer by constructing a coarse aggregate toward the legal side.

In addition, the present invention preferably the upper fill portion is made of a multi-stage pocket type fill structure using geotextile, and provided with EPS (Expanded Poly-Styrene) block extending from side to side based on the top of the corrugated steel pipe structure of the load It provides a covered tunnel using corrugated steel pipe and geotextile, which is characterized by reducing and dispersing.

In addition, the present invention preferably is the EPS block is made of at least two stages in accordance with the design performance, and covered with a corrugated steel pipe and geotextile, characterized in that extending to the left and right 2m relative to the top end of the corrugated steel pipe structure. Provide a tunnel.

In addition, the present invention is preferably the upper fill portion reinforcement block or vegetation bag at both ends of the corrugated steel pipe structure to prevent road loss and aesthetics of the fill material from the upper side of the corrugated steel pipe structure to the expanded poly-styrene (EPS) block, respectively It provides a ventilated tunnel using a corrugated steel pipe and geotextile characterized in that the construction.

And the present invention is preferably the upper fill portion is a corrugated steel pipe and a geotextile, characterized in that the geotextile from the EPS (Expanded Poly-Styrene) block to the design height is a multi-stage construction of a pocket surrounding the fill material to provide.

In another aspect, the present invention preferably provides a corrugated steel pipe and a geo-textile, characterized in that the upper fill portion is configured to achieve a smooth drainage by constructing a drainage layer consisting of a coarse aggregate at the portion in contact with the legal surface.

And the present invention preferably provides a corrugated steel pipe and a cover tunnel using a geotextile, characterized in that the corrugated steel pipe structure is replaced by a corrugated steel sheet structure.

In order to achieve the above object, the present invention, in the construction method of the cover tunnel made by excavating the ground,

Installing a corrugated steel pipe structure after the trench construction;

After installing the corrugated steel pipe structure, constructing a concrete pocket between the trench space and the structure;

Constructing a lateral fill portion on top of the concrete to the top of the corrugated steel pipe structure;

Constructing an upper fill portion from an upper end of the lateral fill portion and a corrugated steel pipe structure to a design height to an upper side; And

And determining whether the upper fill portion is completed up to a design height, wherein the fill portion comprises a multistage pocket type fill structure using geotextiles. do.

In addition, the present invention preferably the step of installing the corrugated steel pipe structure is a method of constructing a corrugated steel pipe and a geo-textile, characterized in that it comprises a step of installing each of the base concrete parts on the lower sides of the corrugated steel sheet structure To provide.

And preferably the step of installing the corrugated steel pipe structure is a corrugated steel pipe, characterized in that it comprises a step of wrapping the geotextile on the outer surface of the corrugated steel pipe structure to prevent repair and inflow of sediment material into the interior of the corrugated steel pipe structure And it provides a construction method of the open tunnel using geotextile.

In addition, the present invention preferably constructing the concrete pocket is a corrugated steel pipe, characterized in that it extends both ends of the geotextile wrapped around the outer surface of the corrugated steel pipe structure, the width of the left and right 3m of the corrugated steel pipe structure thereon And it provides a construction method of the open tunnel using geotextile.

In another aspect, the present invention preferably provides a method of constructing a cover tunnel using a corrugated steel pipe and geotextile, characterized in that the step of constructing the concrete pocket includes a step of forming a drain hole in each end surface.

In addition, the present invention preferably the step of constructing the side fill portion is made of a multi-stage pocket type fill structure using geotextiles each having a fill height of 1 m, corrugated steel pipe, characterized in that the compaction is made using a vibration hammer for compaction And it provides a construction method of the open tunnel using geotextile.

And preferably, the step of constructing the lateral fill portion includes a step of constructing a reinforcement block or vegetation bag to prevent road loss and aesthetics of the fill material at each end of the corrugated steel pipe structure, respectively, each 1m fill If it is done, it provides a construction method of the cover tunnel using corrugated steel pipes and geotextiles, characterized in that it covers the landfill material up to the surface as a spare of the already laid geotextiles.

In another aspect, the present invention preferably provides a method of constructing a corrugated steel pipe and the use of geo-textile, characterized in that the step of constructing the lateral fill portion comprises a step of forming a drainage layer by applying the coarse aggregate to the legal side. .

The present invention preferably includes the step of constructing the upper fill part by constructing an expanded poly-styrene (EPS) block that extends from side to side based on the top end of the corrugated steel pipe structure to reduce and distribute the load. It provides a method of constructing a ventilated tunnel using a corrugated steel pipe and geotextile characterized in that.

In addition, the present invention preferably the process of constructing the EPS block is made of at least two or more stages according to the design effort, and the corrugated steel pipe and geotech characterized in that for extending the left and right 2m relative to the top end of the corrugated steel pipe structure Provides the construction method of the open tunnel using style.

And preferably the step of constructing the upper fill portion using a corrugated steel pipe and geotextile, characterized in that it comprises a step of making a smooth drainage by constructing a drainage layer consisting of crude aggregates in contact with the legal surface Provides the construction method of the cover tunnel.

According to the present invention, according to the present invention, the corrugated steel pipe and the construction method using the geotextile have an arcuate corrugated steel pipe structure and an EPS block on the upper portion thereof, which disperses the load of the flooring material, and is relatively inexpensive. There is this.

In addition, the present invention is applied to the pocket earthwork method and EPS block using geotextile, which is a kind of geotextile, to compensate for the weakness of the corrugated steel pipe, so that the load and side pressure are distributed to the left and right as much as possible to influence the load. Minimize and achieve the reinforcement effect of the inundated soil on the left and right slopes, so that the stable cover tunnel structure can be constructed, and the construction cost and construction period can be shortened, and the road clearance can be obtained.

In addition, according to the present invention is obtained an excellent effect that can be suitably used in the ecological movement passage that does not significantly affect the load of the floor.

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

The corrugated steel pipe (1) using corrugated steel pipe and geotextile according to the present invention has a corrugated steel pipe (CSP) or corrugated steel plate (CSP) according to site conditions in a tunnel structure including an ecological passage. As a countermeasure against the loading load and slope side pressure, geotextiles are applied to the pocket embankment using geotextile and expanded poly-styrene blocks.

The open tunnel 1 using the corrugated steel pipe and the geotextile according to the present invention has a corrugated steel pipe structure 10 installed on the road 5, as shown in FIG.

In addition, the present invention preferably is the corrugated steel pipe structure 10 is made in the order of first excavation construction → foundation concrete casting → corrugated steel pipe structure assembly, is a steel structure that can be manufactured in advance in the factory and used in the field .

That is, the corrugated steel pipe structure 10 has foundation concrete parts 12a and 12b respectively installed at lower ends of the corrugated steel pipe structure 10, and a stable foundation is formed. The outer surface of the corrugated steel pipe structure 10 is surrounded by a geotextile 15. It is configured to prevent repair and inflow of fill material into the interior. The geotextile 15 covered on the outer surface of the corrugated steel pipe structure 10 extends to both sides to form the basis of the concrete pocket 20 to be described later.

Concrete pockets 20 respectively installed on both sides of the corrugated steel pipe structure 10 are made of a concrete material, which extends 3 m to both sides of the corrugated steel pipe structure 10, respectively, and a surface S is formed at the end thereof. . In addition, the concrete pocket 20 is formed by each of the drain holes 24 on both ends of the surface (S) to effectively drain the water flowing from the surface (S).

And the present invention has a side fill portion 30 which is located on the top of the concrete pocket (20). The lateral fill portion 30 is to use the geotextile 32, it is constructed in multiple stages to the top of the corrugated steel pipe structure (10). The side fill portion 30 is composed of a multi-stage pocket type fill structure using a geotextile 32 having a fill height of 1 m each, such a side fill portion 30 is shown in Figures 3 and 4, The landfill material 35 is located inside the geotextile 32, and the landfill material 35 is a reinforcement soil block or vegetation bag for preventing the loss of road and the appearance of the landfill material 35 at both ends of the corrugated steel pipe structure 10, respectively. Surrounded by (37).

As such, the reinforcement soil block or vegetation bag 37 is to surround the fill material 35 therein, such fill material 35 is corrugated steel pipe structure 10 based on the height of the reinforcement soil block or vegetation bag 37. Compaction in the direction of). At this time, the compaction method of the fill material 35 is executed by the compaction using the vibration hammer for compacting in order to minimize the influence of the vibration on the corrugated steel pipe structure (10).

In addition, the side fill section 30 constructs a coarse aggregate toward the left and right law surface S side to form a drainage layer 42 so that water flows smoothly along the law surface S toward the drain port 24 side of the lower side thereof. .

The present invention also includes an upper fill portion 50 on the upper side of the lateral fill portion 30 and the corrugated steel pipe structure 10. The upper fill portion 50 is formed from the upper side of the side fill portion 30 and the corrugated steel pipe structure 10 to the design height (H), which is the EPS (Expanded Poly-Styrene) block 60 in the middle It is provided to reduce and distribute the load on the floor. Expanded Poly-Styrene (EPS) block 60 extends 2m from side to side, respectively, based on the top of the corrugated steel pipe structure 10, and is made of at least two stages according to design performance. And the upper fill portion 50 is configured so that the smooth drainage by constructing the drainage layer 54 made of coarse aggregate in the portion in contact with the left and right sides (S) to the design height (H).

And the upper fill portion 50 is also made of a multi-stage pocket type fill structure using a geotextile 62 surrounding the fill material (65), the height of the EPS (Expanded Poly-Styrene) block 60 is 3 and As shown in FIG. 4, the landfill material 65 is positioned inside the geotextile 62, and the landfill material 65 may prevent road loss of the landfill material 65 at both ends of the corrugated steel pipe structure 10, respectively. Surrounded by reinforcement block or vegetation bag (67) for aesthetics, the compaction is executed. In addition, the EPS (Expanded Poly-Styrene) block 60 to the design height (H) is a multi-stage construction using the geotextile 62 and the fill material (65).

Therefore, the ventilated tunnel 1 using the corrugated steel pipe and the geotextile according to the present invention is provided with an EPS block 60 on the upper side of the corrugated steel pipe structure 10 so as to load the corrugated steel sheet, which is a tunnel structure, such as reducing loads and side pressure. Minimize the impact, and for the left and right slopes of the tunnel, the seismic reinforcing effect of the geotextiles (32) and 62 and the soil material (35) and (65) is achieved without the need for additional reinforcement. Lose. Therefore, not only can the stability of the open tunnel (1) than the conventional construction method, it is possible to obtain efficiency and economic efficiency through the reduction of construction cost and construction period.

In the present invention, the corrugated steel pipe structure 10 has a very high design height (H), so that the load on the load is large, or the instability is continuously observed on the left and right surfaces (S) so that the side pressure is only applied to the geotextiles (32) and (62). When it is judged to be unbearable, it can be replaced with a corrugated steel sheet structure.

In addition, the corrugated steel pipe structure 10 is replaced with a corrugated steel plate structure and can be applied to the same construction method even when it is determined that the influence of the floor load or the side pressure is very large in design.

Hereinafter, the construction method 100 of the ventilated tunnel using the corrugated steel pipe and the geotextile according to the present invention will be described in detail.

In the construction method 100 of the ventilated tunnel using the corrugated steel pipe and the geotextile according to the present invention, as shown in FIG. 5, a step 110 of installing the corrugated steel pipe structure 10 after the trench construction is performed. Step 110 of installing the corrugated steel pipe structure 10 is first made in the order of trench construction → foundation concrete pouring → corrugated steel pipe structure 10, when the assembly of the corrugated steel pipe structure 10 is completed, In order to prevent repair and inflow of fill material into the corrugated steel pipe structure 10, a process of wrapping the geotextile 15 in close contact with the corrugated steel pipe structure 10 is performed.

Next, after the installation of the corrugated steel pipe structure 10 as described above, a step 120 of constructing the concrete pocket 20 between the trench space and the structure is performed, and the step 120 is a trench space and The concrete pocket 20 is formed by pouring concrete up to 3 m in width between left and right sides of the corrugated steel pipe structure 10, and in this case, the geotextile 15 closely contacted with the corrugated steel pipe structure 10 is tensioned to concrete. It serves as the basis of the pocket 20. At this time, both ends of the concrete pocket (20) of the concrete surface (20) is constructed in the drain hole 24 of 0.3m in width, 0.3m in height to induce smooth drainage on the upper side, respectively.

In addition, the next step 130 is the construction of the lateral fill portion 30 to the top of the corrugated steel pipe structure 10 on the top of the concrete. In the side fill section 30 construction step 130, when the left and right concrete pockets 20 exhibit a certain strength or more, using the geotextile 32 to the top of the corrugated steel pipe structure 10 as follows step by step Construct a pocket fill in multiple stages. First, as shown in FIG. 4, the geotextile 32 is laid on the upper surface of each concrete pocket 20 in the direction of the corrugated steel pipe structure 10 from the surface S. FIG. At this time, considering that the construction of the pocket type, the installation length of the geotextile 32 is more than twice the installation length of the upper surface of the concrete pocket 20.

And both ends of the corrugated steel pipe structure 10, that is, the front and rear entrances and exits of the abdominal tunnel prevents the loss of the roadway of the fill material 35 and selects and constructs the reinforcement soil block or the vegetation bag 37 for the exterior aesthetics. 4 is shown. After constructing the reinforcement soil block or vegetation bag 37 as described above, compaction is performed in the direction of the corrugated steel pipe structure 10 with respect to the fill material 35 located inside the geotextile 32 based on the height thereof. At this time, the compaction method is performed by the compaction using the vibration hammer for compacting in order to minimize the influence of the vibration on the corrugated steel pipe structure (10).

In addition, the side fill section 30 is in contact with the surface (S) for the drainage of each stage (공) to construct a coarse ash 0.3 m wide to form a drainage layer 42, the open tunnel (1) Ensure a smooth drainage of repairs from Such side fill section 30 repeatedly constructs the reinforcement soil block or vegetation bag 37 until the fill level is 1 m, and compacts the fill material 35. And when each stage togo of each side of the filling section 30 is 1 m each wraps the filling material 35 to the surface (S) by using the excess of the already laid geotextile (32).

When the construction of each stage of the side fill section 30 is completed, the upper fill section 50 is constructed from the upper end of the side fill section 30 and the corrugated steel pipe structure 10 to a design height H to the upper side. Step 140 is made. That is, when the lateral fill portion 30 is completed to the top end of the corrugated steel pipe structure 10 and the flat surface comes out, the upper fill portion 50 is constructed in multiple stages according to the general fill construction method up to the design height (H). At this time, the length of the left and right, respectively 2m relative to the top end of the corrugated steel pipe structure (10) by constructing the EPS (Expanded Poly-Styrene) block 60 to reduce the load and the dispersion of the load. The construction of the EPS block 60 is constructed according to the site conditions of at least two stages according to the design height (H). In addition, the upper fill portion 50 is repaired to occur in the open tunnel (1) by constructing a drainage layer 54 using a coarse ash of 0.3 m in the portion that is in contact with the surface (S) for drainage of each stage (段) Ensure a smooth drainage of the inlet. In addition, the upper fill portion 50 is formed as described above, including the step 150 of determining whether the design height H is completed as the upper fill portion 50 is formed.

As described above, the method 100 for constructing an open tunnel using a corrugated steel pipe and a geotextile according to the present invention uses geotextiles (32) and (62) instead of the soil using the earth and sand on the side and the upper side of the corrugated steel pipe structure (10). An EPS block 60 is constructed on the top of the pocket-shaped and arched corrugated steel pipe structure 10. Therefore, the present invention minimizes the influence of the load by distributing the floor load and the lateral pressure to the left and right as much as possible, and can achieve a reinforcing effect of the pressed soil on the left and right slopes, thereby making it possible to construct a stable cover tunnel (1) structure, and construction cost. And can shorten the construction period and secure the free space of the road (5). In addition, the present invention can be suitably used for ecological movement passages that do not significantly affect the load of the floor.

On the other hand, the present invention has a very high design height (H), the load on the load is great, or instability on the left and right surface (S) is continuously observed when it is determined that the geotextile (32, 62) alone can not withstand the side pressure waveform Instead of the steel pipe structure 10 can be constructed in the same way as a corrugated steel sheet structure. In addition, even when it is determined that the influence of the load and side pressure in the tunnel design is very large, the same construction method can be applied by replacing the corrugated steel pipe structure 10 with a corrugated steel sheet structure.

Although the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to such a specific structure. Those skilled in the art will be able to variously modify or change the embodiments of the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. Nevertheless, it will be apparent that all such modifications or design modifications to such simple embodiments will clearly fall within the scope of the present invention.

1 is an external perspective view showing a covered tunnel structure according to the prior art;

Figure 2 is a cross-sectional view showing the abdominal tunnel using a corrugated steel pipe and geotextile according to the present invention;

3 is a cross-sectional view showing in detail the lateral fill portion provided in the ventilated tunnel using the corrugated steel pipe and geotextile according to the present invention;

4 is an explanatory diagram showing a process of constructing a reinforcement soil block and a vegetation bag at an entrance tunnel entrance to a side fill portion and an upper fill portion in an opening tunnel using a corrugated steel pipe and a geotextile according to the present invention;

Figure 5 is a flow chart showing a step-by-step construction method of the vent tunnel using the corrugated steel pipe and geotextile according to the present invention.

<Description of Symbols for Major Parts of Drawings>

1 ..... Open tunnel using corrugated steel pipe and geotextile according to the present invention

5 ..... road 10 ..... corrugated steel pipe structure

12a, 12b .... Foundation Concrete Parts 15,32,62 .... Geotextile

20 .... concrete pockets 24 .... drains

30 .... side fill 35,65 ... fill

37,67 ... Reinforced earth block or vegetation bag

42,54 .... drainage floor 50 .... upper fill

60 .... Expanded Poly-Styrene (EPS) Block

100. Method of constructing a ventral tunnel using corrugated steel pipe and geotextile according to the present invention

110 ... step of installing corrugated steel pipe structure

120 ... Steps to construct a concrete pocket between the trench and the structure

130 ... Construction of the lateral fill to the top of the corrugated steel pipe structure

140. Constructing the upper fill part to the upper side to the design height

150 ... step of determining whether the upper fill is up to the design height

200 .... conventional tunnel structure

H ..... design height S .....

Claims (26)

In the open tunnel made by excavating the ground, Corrugated steel pipe structure installed on the roadway; Concrete pockets respectively installed on both sides of the corrugated steel pipe structure; A lateral fill portion located above the concrete pocket; And And an upper fill portion located at an upper side of the lateral fill portion and the corrugated steel pipe structure, wherein the fill portion is formed of a multi-stage pocket type fill structure using geotextiles. According to claim 1, wherein the corrugated steel sheet structure is a corrugated steel pipe and geotextile, characterized in that the foundation concrete portion is installed on each of the lower end of both sides. The corrugated steel pipe structure of claim 2, wherein the corrugated steel plate structure is wrapped around the outer surface of the corrugated steel structure to prevent repair and inflow of the fill material into the corrugated steel pipe structure. The corrugated steel pipe structure as claimed in claim 3, wherein the corrugated steel sheet structure is extended to form a foundation of the concrete pocket. According to claim 1, wherein the concrete pocket is a corrugated steel pipe and geotextile using the open tunnel, characterized in that extending to both sides of the corrugated steel pipe structure. The method according to claim 5, wherein the concrete pocket is a corrugated steel pipe and geotextile, characterized in that the drain holes are formed in each of the end surface respectively. The method of claim 1, wherein the lateral fill portion is multi-stage construction up to the top of the corrugated steel pipe structure, a multi-stage pocket type fill structure using a geotextile having a fill height of 1m each, the open tunnel using a corrugated steel pipe and geotextile . The corrugated steel pipe and geotextile of claim 7, wherein the lateral fill portion is constructed of reinforcement soil blocks or vegetation bags at both ends of the corrugated steel pipe structure to prevent road loss and aesthetic appearance of the fill material. The corrugated steel pipe and the geotextile of claim 8, wherein the lateral fill portion is formed of a drainage layer by constructing a coarse aggregate toward the legal side. The method of claim 1, wherein the upper fill portion is made of a multi-stage pocket type fill structure using geotextile, and has a EPS (Expanded Poly-Styrene) block extending to the left and right with respect to the top end of the corrugated steel pipe structure to reduce the load The open tunnel using corrugated steel pipes and geotextiles, characterized in that it forms a dispersion with. 11. The method of claim 10, wherein the EPS block is made of at least two stages in accordance with the design effort, and extends to the left and right with respect to the top end of the corrugated steel pipe structure, characterized in that the corrugated steel pipe and geotextile using a tunnel. 11. The method of claim 10, wherein the upper fill portion from the upper side of the corrugated steel pipe structure to the expanded poly-styrene (EPS) block, respectively, the reinforcement block or vegetation bag at both ends of the corrugated steel pipe structure to prevent road loss and aesthetics of the fill material An open tunnel using corrugated steel pipes and geotextiles, characterized by being constructed. The cover tunnel of claim 10, wherein the upper fill portion is formed in a multi-stage structure in which a geotextile wraps the fill material from the EPS (Expanded Poly-Styrene) block to a design height. The corrugated steel pipe and the geotextile according to claim 10, wherein the upper fill portion is configured to construct a drainage layer made of coarse aggregate at a portion in contact with the legal surface so that smooth drainage occurs. The method of claim 1, wherein the corrugated steel pipe structure is a corrugated steel pipe and geotextile using an open tunnel, characterized in that replaced by a corrugated steel sheet structure. In the construction method of the cover tunnel made by excavating the ground, Installing a corrugated steel pipe structure after the trench construction; After installing the corrugated steel pipe structure, constructing a concrete pocket between the trench space and the structure; Constructing a lateral fill portion on top of the concrete to the top of the corrugated steel pipe structure; Constructing an upper fill portion from an upper end of the lateral fill portion and a corrugated steel pipe structure to a design height to an upper side; And And determining whether the upper fill part is completed up to a design height, wherein the fill part comprises a multi-stage pocket type fill structure using geotextiles. The method of claim 16, wherein the installing of the corrugated steel pipe structure comprises installing a concrete unit on each of lower ends of the corrugated steel sheet structure. 18. The method of claim 17, wherein the step of installing the corrugated steel pipe structure corrugated steel pipe, characterized in that it comprises a step of wrapping the geotextile on the outer surface of the corrugated steel pipe structure to prevent repair and inflow of sediment material into the interior of the corrugated steel pipe structure and Construction method of the open tunnel using geotextile. 17. The method of claim 16, wherein the construction of the concrete pocket is a corrugated steel pipe, characterized in that extending both ends of the geotextile wrapped around the outer surface of the corrugated steel pipe structure, the width of the right and left 3m of the corrugated steel pipe structure thereon Construction method of the open tunnel using geotextile. 20. The method of claim 19, wherein the step of constructing the concrete pocket comprises a step of forming a drain in each end surface of the concrete pocket. 17. The method of claim 16, wherein the construction of the lateral fill portion is made of a multi-stage pocket type fill structure using a geotextile having a fill height of 1m each, and corrugated steel pipe, characterized in that the compaction is made using a vibration hammer for compaction Construction method of the open tunnel using geotextile. 22. The method of claim 21, wherein the construction of the lateral fill portion includes a step of constructing a reinforcement block or a vegetation bag at each end of the corrugated steel pipe structure to prevent road loss and aesthetic appearance of the fill material, respectively. The construction method of the cover tunnel using corrugated steel pipes and geotextiles, which wraps up the soil material to the surface as an extra of the geotextiles already laid on the ground. 22. The method of claim 21, wherein the construction of the lateral fill portion comprises a step of forming a drainage layer by applying a coarse aggregate to the front side. 17. The method of claim 16, wherein the construction of the upper fill portion includes a process of reducing and dispersing the load on the floor by constructing an Expanded Poly-Styrene (EPS) block extending from side to side with respect to the top of the corrugated steel pipe structure. Method of constructing the open tunnel using corrugated steel pipe and geotextile. The corrugated steel pipe and geotextile according to claim 24, wherein the EPS block is constructed in at least two stages according to design performance and extends 2m to the left and right relative to the top of the corrugated steel pipe structure. Construction method of the open tunnel. 25. The method of claim 24, wherein the construction of the upper fill portion comprises a step of constructing a drainage layer made of coarse aggregate in a portion in contact with the normal surface to ensure a smooth drainage of the corrugated steel pipe and geotextile Construction method of the tunnel.

Images