KR20110135224A - Method for installing soil nailing and tunnel prevent hole for tidal plant - Google Patents

Abstract

PURPOSE: A slope protection work for a tidal power station and a scour protection mounting method are provided to prevent the scour on a slope surface which is formed by high and strong waves. CONSTITUTION: A slope protection work for a tidal power station is composed like next. A levee riprap(11) and a wing wall(7) are formed on the slope surface. The steel reinforcement bars are arranged and the concrete is poured in the slope surface. A reinforced concrete weight material is connected to the bottom of the reinforced concrete covering(13). A scour preventive armor stone is piled on the slope surface.

Description

METHOD FOR INSTALLING SOIL NAILING AND TUNNEL PREVENT HOLE FOR TIDAL PLANT}

The present invention relates to a slope protection hole and scour prevention ball installation method for tidal power plant, and in detail, the slope is formed with a crushed stone on the side of the retaining wall, and the reinforced concrete cover is formed on the upper surface of the crushed stone, the solid stone and reinforced concrete Integrate the cladding, install a concrete weight structure on the bottom of the floor in connection with the reinforced concrete cladding, install a civil mat with a width twice the depth of scour in connection with the concrete weight structure, and install sandstone and cladding on the top of the civil mat. It relates to a slope protection work and scour prevention ball installation method for tidal power plant to form.

In general, a power generator that generates electricity using coal, oil, or nuclear power is typically a thermal power plant, a hydroelectric generator, and a nuclear power plant.

Thermal power plants use fossil fuels, which not only deplete fossil fuel resources, but also cause serious damage to the environment due to pollution, and hydroelectric power plants must submerge large areas. There is a problem that causes damage to the natural ecosystem. In addition, the nuclear power plant has a problem in safety due to the use of nuclear fuel, and is contaminated with the environment by the waste and pollutants of nuclear power generated in the power generation process has emerged as a serious threat to life.

In order to solve such a problem, a power generator using nature includes a solar power generator, a wind power generator using wind power, and an tidal power generator using a difference between tides of the sea.

The west coast of Korea has favorable conditions for tidal power generation, and began to examine feasibility of tidal power plant for Incheon sea area in 1929 when the governor-general government began. In recent years, Sihwa tidal power plant is under construction in Sihwa Lake, and eco-friendly energy development under the Taoist Protocol As part of this project, feasibility and detailed design have been achieved through active promotion of tidal power projects such as Incheon Bay and Garorim Bay.

Tidal power generation is a power generation method that uses the rising and falling phenomenon of sea level due to tides.It is a floating type that uses buoyancy received by floating bodies, and a compressed air type that uses compressed air in a closed room according to the rising and falling of tides. It can be classified as a seawater reservoir, that is, a Georgian formula that develops and develops George.

The only of these commercially available tidal-powered tidal power generations is the formation of georges on the coast where tidal-wave differences are remarkable, and the sluice waters are opened by opening water gates at high tide. It is a method of generating water by driving aberration in the process of flowing water into or outflow from George to the open sea when the open sea is low.

In this type of tidal power generation, the method of operating the aberration when the inflow of the seawater into the George and the drainage to the external sea is called the double-flow type, and the method of operating the aberration only in either the inflow or the drainage is called the single-flow type. The operation of the aberration at the time of inflow is called the creative expression, and the operation at the time of drainage is called the eruption.

1 is a plan view schematically showing the installation and arrangement of the entire tidal power plant system in which the aberration structure and the hydrologic structure are installed.

As shown in FIG. 1, the tidal power difference between the tidal power plant construction site and the tidal power station between the lake side (L) and the seaside (S) is installed in a block, between the surrounding park site and land. Numerous aberration structures (1), hydrologic structures (3) and connecting structures (5) are installed between them, so that the marine tourism function, access road function, power plant function, etc. coexist with the hydrological structure for nature-friendly creative tidal power plant. to be. The outermost aberration structure 1 and the outermost hydrological structure 3 are each provided with a wing wall 7.

This conventional tidal power plant has a high flow rate (3.5-5.0 kPa at the sea side, 3-4 kPa at the lake side) during generation and drainage at both ends of each wing wall 7, and the slope is connected to the wing wall because of the high water level. And scour occurs in the floor associated with the slope, in order to prevent the covering stone (0.1㎥ / EA or less) is covered on the slope and the floor.

However, such a covering stone is designed to prevent scouring only at a flow rate of less than 4.0 kPa, and there is a problem that the covering stone is lost at a flow rate of 4.0 kPa or more and high water level, thus preventing the scour of the slope and the bottom.

The present invention is to solve the problems as described above, by forming a slope with a body of stone on one side of the wing wall, by forming a reinforced concrete coating on the upper surface of the body of the body of the slopes integrating the body and reinforced concrete coating slope The purpose is to provide a slope protection and scour prevention installation method for tidal power plants to reliably protect the.

In addition, the present invention is to install a concrete weight structure on the bottom of the floor in connection with the reinforced concrete coating, and after installing a civil mat with a width of twice the scour depth in connection with the concrete weight structure, the sandstone and covering stone on the top surface of the civil mat It provides flexibility by forming and providing flexibility to cope with uneven sedimentation by scour at flow rate of 4.0㎧ or higher, and to provide slope protection work and scour prevention installation method for tidal power plants to prevent scouring after completion of uneven sedimentation. There is another purpose.

Features of the present invention for achieving the above object,

Claims [1] A method for installing a slope protection hole and a scour prevention ball installed on a wing wall of a tidal power plant, the method comprising: a first step of forming an inclined slope on a seaside or a lake side of the wing wall to form a slope; A second step of curing the reinforcing bar by reinforcing the reinforcing bar on the front surface of the body of stone; A third step of pouring and curing the reinforced concrete weight in connection with the lower end of the reinforced concrete covering; A fourth step of digging the bottom of the sea side or the lake side; A fifth step of installing a civil engineering mat in which the reinforced concrete weight and one end are integrated on the sea side or the lake side bottom which is formed in the bottom of the slope; A sixth step of stacking a scour-preventing stone on the top surface of the civil mat; And a seventh step of laminating an anti-washing coated stone on the upper surface of the anti-washing stone.

Here, in the second step, when the wing wall is the sea side, at least two layers of slope protection claddings of different specifications are stacked on the front upper end of the body of stone, and then the reinforced concrete cover is formed at the bottom of the slope protection cladding. .

Here, the reinforced concrete cover is formed in a unit of block.

Here, in the fourth step, the trench is made twice the width of the scour depth.

Here, in the seventh step, when the wing wall is the sea side, two or more layers of anti-washing coated stones of different specifications are stacked on the upper surface of the anti-washing stone.

Here, the anti-washing sandstone and the anti-washing coating stone are covered up to the height of the trench.

According to the method for installing the slope protection hole and scour prevention ball for tidal power plant of the present invention constituted as described above, the slope is formed on the one side of the wing wall, the reinforcement concrete coating on the upper surface of the body of the dead body and reinforcement By integrating concrete cladding, it is possible to reliably protect the slope at high water levels.

In addition, according to the present invention, the concrete weight structure is installed on the bottom of the floor in connection with the reinforced concrete coating, and the civil engineering mat is installed in the width of twice the scour depth in connection with the concrete weight structure, and then the top and bottom of the civil engineering mat By providing the flexibility to provide flexibility to cope with uneven settlement by scour at a flow rate of 4.0 kPa or more, it is possible to prevent the progress of scour after the end of the uneven settlement.

1 is a plan view schematically showing the installation and arrangement of the entire tidal power plant system in which the aberration structure and the hydrologic structure are installed.
Figure 2 is a plan view schematically showing the installation position of the slope protection hole and scour protection ball according to the installation method of the slope protection hole and scour prevention ball for tidal power plant according to the present invention.
3 is a cross-sectional view taken along AA of FIG. 2.
4 is a view showing a state of the scour prevention hole during the differential settlement in FIG.
5 is a cross-sectional view taken along line BB of FIG. 2.
6 is a view showing the appearance of the scour prevention hole during the differential settlement in FIG.
Figure 7 is a process chart for explaining the slope protection hole and scour prevention ball installation method for tidal power plant according to the present invention.

Hereinafter, with reference to the accompanying drawings, the method of installing the slope protection hole and scour prevention ball for tidal power plant according to the present invention in detail as follows.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

Figure 2 is a plan view schematically showing the installation position of the slope protection hole and scour protection ball according to the installation method of the slope protection hole and scour prevention ball for tidal power plant according to the present invention, Figure 3 is a cross-sectional view AA of Figure 2, Figure 4 3 is a view showing the appearance of the uneven sinking scour hole in Figure 3, Figure 5 is a cross-sectional view BB of Figure 2, Figure 6 is a view showing the appearance of the uneven sinking scour hole in Figure 5, Figure 7 Process diagram for explaining the method of installing the slope protection and scour prevention ball for tidal power plant according to the invention.

2 to 7, the slope protection hole and scour prevention ball installation method for tidal power plant according to the present invention is inclined to cover the slope 11 to the seaside or the lake side of the wing wall (7) of the tidal power plant sloped A first step (S100) of forming and a second step (S110) of curing the concrete after covering the reinforcing bars on the front surface of the body of stone 11; A third step (S120) of placing and curing the reinforced concrete weight product 15 in connection with the lower end of the reinforced concrete sheath 13; A fourth step (S130) for digging the bottom of the sea side or the lake side; A fifth step (S140) of installing a civil engineering mat (21) in which the reinforced concrete weight (15) and one end are integrated on a sea side or a lake side bottom which is formed in the bottom of the slope; A sixth step (S150) of laminating the scour prevention stone 23 on the upper surface of the civil mat 21; And a seventh step S160 of stacking the scour-resistant coated stone 25 on the upper surface of the scour-resistant stone stud 23.

This will be described in more detail as follows.

`` First step-S100 ''

First, a slope is formed by obliquely stacking the body of stone 11 on the sea side or the lake side of the wing wall 7 of the tidal power plant. At this time, the specification of the body of stone 11 is 0.03 m 3 / EA or less.

<< the second process-S110 >>

Then, the reinforcing bar is placed on the entire surface of the body of stone 11 and the concrete is coated to cure the reinforced concrete cover 13. If the concrete is coated after reinforcing the rebar on the front of the body seat 11, part of the body seat 11 is penetrated into the body seat 11 when the concrete is poured, and the body seat 11 and the concrete are integrated, and the concrete is blue. It is possible to prevent the scour caused by.

At this time, when the wing wall 7 is the sea side (S), the slope protection cladding 13a, which is 0.1 m3 / EA, is laminated on the top of the front surface of the body building 11 in one layer, and then again 0.6m3 / EA standard. After the phosphorescent protective covering 13b is stacked in two layers, the reinforced concrete covering 13 is formed at the lower ends of the slope protective covering 13a and 13b.

In addition, since the reinforced concrete coating 13 is large in size, it is preferable to form the block unit of a predetermined unit, and it is preferable to form the thickness of the reinforced concrete coating 13 about 30 cm.

`` Step 3-S120 ''

In connection with the bottom of the reinforced concrete sheath 13, that is, the reinforced concrete weight 15 is poured to cure and complete the slope protection hole (10). At this time, the thickness of the reinforced concrete weight 15 is preferably formed to about 1m.

<< the fourth process-S130 >>

Then, the bottom of the sea side (S) or lake side (L) is excavated. At this time, the trench can also be made before stacking the cobblestone (11).

On the other hand, the trench has a depth of 2.5m on the sea side and 1.3m on the lake side, and forms a horizontal plane at the center and an inclined plane at both ends. The width W of the horizontal plane is defined by CEM (COSTAL ENGINEERING MANUAL). It is preferable to carry out at twice the width of the scour depth.

<< the fifth process-S140 >>

In such a state, the civil engineering mat 21 which integrated the reinforced concrete weight 15 and one end is installed in the sea side S or the lake side L which were dug from the bottom of the slope. At this time, one end of the civil engineering mat 21 can be integrated by placing the reinforcement of the reinforced concrete weight 15, or may be integrated with the reinforced concrete weight 15 using a separate anchor (not shown).

Herein, the civil engineering mat 21 has a strength of 10 t / m or more, and a general PP mat, PET mat, fiber mat, or the like is applied, and the laying method also follows the usual laying method.

<< sixth process-S150 >>

When the installation of the civil engineering mat 21 is completed, the scour prevention stone 23 is stacked on the top surface of the civil engineering mat 21. At this time, the scour prevention stone 23 is a standard of 0.03 m 3 / EA, and preferably has a height of 1 m on the sea side and 50 cm on the lake side.

`` Seventh Step-S160 ''

When the lapping of the anti-washing stone 23 is completed, the anti-washing stone 25 is stacked on the upper surface of the anti-washing stone 23 to complete the anti-washing hole 20.

At this time, when the wing wall (7) is the sea side (S), the surface of the scour prevention stone 23 to the top of the scour prevention coating stone (25a) of 0.1 ㎥ / EA of a standard 50cm and then again 1.0㎥ / It is preferable to stack the scour-resistant coated stone 25b, which is the standard of EA, to a height of 1 m, and when the wing wall 7 is the lake side L, the specification of 0.5m3 / EA is applied to the top of the front surface of the scour-resistant sandstone 23. It is preferable to stack the phosphorus scour-resistant coated stone 25 to a height of 80 cm.

On the other hand, by integrating the body of stone 11, the reinforced concrete coating 13 and the reinforced concrete weight 15, it is possible to prevent the scour from occurring on the slope by the blue and high water level.

In addition, when the scour prevention hole 20 is formed through the civil mat 21 and the scour prevention stone 23 and the scour prevention coating 25, scour occurs according to the flow rate at the bottom of the civil mat 21, Some uneven settlement occurs, but because the civil mat 21, the anti-washing stone 23 and the anti-washing stone 25 are separated from each other as shown in Figures 5 and 6 Since they are settled together in a state in which they are in close contact with the generated surface, the civil engineering mat 21 and the space part of the floor are prevented from being generated, and thus, scour due to the occurrence of the cavity is rapidly prevented.

In addition, if scouring proceeds to a predetermined depth or more, the scour is no longer progressed by the civil engineering mat 21, the scour prevention sandstone 23, and the scour prevention coating stone 25. Scour can be prevented.

As those skilled in the art would realize, the described embodiments may be modified in various ways, all without departing from the spirit or scope of the present invention. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the description, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. Should be.

10: slope protector 11: carcass seat
13: reinforced concrete cover 15: reinforced concrete weight
20: scour prevention ball 21: civil engineering mat
23: anti-washing stone 25: anti-washing stone

Claims (6)

In the method of installing the slope protection and scour prevention ball installed on the wing wall of the tidal power plant,
A first step of forming an inclined surface by obliquely stacking the embankment seat on the sea side or the lake side of the wing wall;
A second step of curing the reinforcing bar by reinforcing the reinforcing bar on the front surface of the body of stone;
A third step of pouring and curing the reinforced concrete weight in connection with the lower end of the reinforced concrete covering;
A fourth step of digging the bottom of the sea side or the lake side;
A fifth step of installing a civil engineering mat in which the reinforced concrete weight and one end are integrated on the sea side or the lake side bottom which is formed in the bottom of the slope;
A sixth step of stacking a scour-preventing stone on the top surface of the civil mat; And
Slope protection ball and scour prevention method installation method for tidal power plant, characterized in that the seventh step of laminating the scour prevention coating stone on the upper surface of the anti-washing stone. The method of claim 1,
The second step,
When the wing wall is at the sea side, the slope of the reinforced power plant, characterized in that the reinforced concrete cover is formed on the lower surface of the slope protection cladding after the two or more layers of slope protection cladding of different specifications on the front top of the body building stone Protector and scourer installation method. The method of claim 2,
The reinforced concrete coating,
Slope protection work and scour prevention installation method for tidal power plant, characterized in that formed in a block unit of a predetermined unit. The method of claim 1,
The fourth step,
Slope protection hole and scour prevention installation method for tidal power plant, characterized in that the trench is made twice the width of scour depth. The method of claim 1,
The seventh step,
When the wing wall is the sea side slope protection ball and scour prevention method installation method for tidal power plant, characterized in that two or more layers of scour prevention coated stone of different specifications on the upper surface of the scour prevention stone. The method of claim 5, wherein
The scour-resistant stone and the scour-resistant coating stone,
Slope protection ball and scour prevention installation method for tidal power plant, characterized in that the cover up to the trench height.

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