KR101529268B1 - Gravity harbour increasing depth method using steel pile and excavation - Google Patents

Abstract

The purpose of the present invention is to provide gravity harbor structure depth increase structure and method using a steel pile and excavation to reinforce the front center of a gravity harbor structure and the gravity harbor structure in order to improve the productivity of an existing gravity harbor structure and to allow a ship to come alongside the pier or to be moored. To achieve this, the gravity harbor structure depth increase method using a steel pile and excavation comprises: a step (I) of boring capping concrete and a wall for predetermined diameter and depth to form a borehole; a step (II) of inserting a steel pile into the borehole and installing a hydraulic jack on the capping concrete of the steel pile to be fixated; a step (III) of embedding the steel pile into a rubble mound with the hydraulic jack and moving the wall upwards at the same time; a step (IV) of excavating the rubble mound to a predetermined depth; a step (V) of mounting the wall which has been moved upwards on the excavated rubble mound; and a step (VI) of pouring and curing concrete on the capping concrete to form additional capping concrete.

Description

Gravity harbor increasing depth method using steel pile and excavation.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gravity type harbor structure (including a gravity type harbor structure such as a quay wall, a waterslide, a shore, a breakwater, To adjust the position of the draft of the water.

Generally, the gravity type harbor structure 100 includes a foundation ground 110, as shown in Fig. 1; A sandstone mound 120 constructed on the foundation ground 110; A wall 130 installed on the silt mound 120; A back ground 140 supported by the silt mound 120 and the wall 130; And a capping concrete (150) installed at an upper end of the wall (130).

However, the conventional gravity type harbor structure 100 having the above-described structure has a problem in that, due to the recent enlargement of the ship, there is a need for additional dredging for securing the draft to the front wall of the sidewalk and the side of the shed and for increasing the height of the gravity type harbor structure 100 Is emerging.

In the case of the new gravity type harbor structure, the size of the gravity type harbor structure may be determined in consideration of future demand forecasts. However, when the conventional gravity type harbor structure 100 exists, considering the construction period and economical efficiency, It is indispensable to develop an efficient technique for changing and increasing the position of the structure 100.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a gravity type harbor structure and a gravity type harbor structure, The present invention is to provide a gravity type port structure structure using a steel file and excavation.

In order to accomplish the above object, a gravity type harbor structure guiding structure using a steel pile and excavation according to the present invention comprises: a foundation ground; A sandstone constructed on the foundation foundation; A wall disposed on the silt mound; A back ground supported by the stony mound and the wall; Wherein the capping concrete and the wall are punched to a predetermined diameter and depth to form a perforation hole, a steel material file is inserted into the perforation hole, and the steel material is inserted into the perforation hole, A hydraulic jack is fixedly installed on the capping concrete of the file, the steel pile is penetrated into the masonry mound by using the hydraulic jack, the wall is moved upward, the masonry mound is excavated to a certain depth, The wall is placed on the excavated masonry mound, and concrete is placed and cured on the capping concrete to form additional capping concrete.

According to another aspect of the present invention, there is provided a gravity type harbor structure remediation method using a steel pile and excavation according to the present invention includes a foundation ground; A sandstone constructed on the foundation foundation; A wall disposed on the silt mound; A back ground supported by the stony mound and the wall; (I) of forming a perforation hole by perforating the capping concrete and the wall to a predetermined diameter and depth, the gravity type port structure comprising capping concrete installed at an upper end of the wall; Inserting a steel material file into the perforation hole and fixing a hydraulic jack on the capping concrete of the steel material file (II); (III) moving the wall upwardly while penetrating the steel material pile into the masonry mound using the hydraulic jack; (IV) excavating the silt mound to a certain depth; (V) placing the upwardly moved wall on the excavated slate mound; And forming additional capping concrete by placing and curing concrete on the capping concrete (step VI).

INDUSTRIAL APPLICABILITY As described above, the gravity type harbor structure structure and drilling method using the steel file and excavation according to the present invention have the following effects.

First, the present invention can secure structural stability through integration with the lower ground.

Secondly, the present invention can solve the problem due to the existing marginal walls or the limitation of the built in restaurants.

Third, the present invention can secure economical efficiency by utilizing a conventional harbor structure.

Fourth, the present invention is advantageous in that seawater can be used to obtain the same initial strength and long-term strength without using a strong alkali promoter (water glass or the like), to reduce the cost of purchasing drugs, and to reduce the damage of environmental pollution have.

Fifth, by using sea water, the present invention is advantageous in that inconvenience and cost for separately transporting fresh water can be reduced.

Sixth, since the initial viscosity is generated due to the specific chemical action of seawater, the present invention has an advantage in that the material separation phenomenon is reduced even when sand is separately added, and the material is not separated.

1 is a cross-sectional view of a conventional gravity harbor structure,
FIGS. 2A through 2E are process drawings showing a process of growing a conventional gravity type harbor structure using a steel file and excavation according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
Before describing the gravity type harbor structure remediation method using the steel file and excavation according to the present invention, a gravity type harbor structure construction using a steel file and excavation and a gravity type harbor structure using excavation will be described first do.

As shown in FIG. 2E, the steel pipe structure according to the present invention is constructed by a steel pipe pile and a gravity type port structure piling method using excavation. A sandstone mound 120 constructed on the foundation ground 110; A wall 130 installed on the silt mound 120; A back ground 140 supported by the silt mound 120 and the wall 130; And a capping concrete (150) installed at an upper end of the wall (130), the gravity type port structure (100)

The capping concrete 150 and the wall 130 are drilled to a predetermined diameter and depth to form a perforation hole 160. A steel material file 170 is inserted into the perforation hole 160, The hydraulic jack 180 is fixedly installed on the capping concrete 150 of the concrete pipe 150 and the steel pile 170 is penetrated into the masonry mound 120 by using the hydraulic jack 180 and the wall body 130 is moved upward And the concrete is placed on the capping concrete (150), and the concrete is placed on the capping concrete (150) Curing to form additional capping concrete 190.

Here, the rigid wall 200 is fixed between the wall 130 and the back ground 140, and the rigid wall 200 is composed of a main heat shielding wall (CIP) or an underground continuous wall (slurry wall).

That is, the rigid wall body 200 is installed to prevent the collapse of the back ground 140 of the gravity type port structure 100, and the rigid wall structure 200 is formed of a main heat shield wall (CIP) Wall).

Also, the grout material is filled between the wall 130 and the masonry mound 120.

Here, the grout material is composed of 30 to 100 parts by weight of blast furnace slag, 3 to 25 parts by weight of lime, and 28 to 88 parts by weight of seawater.

The grout material is composed of 35 to 50 parts by weight of blast furnace slag, 6 to 8 parts by weight of lime, 40 to 70 parts by weight of sand or aggregate, and 28 to 88 parts by weight of seawater.

The grout material is composed of 40 to 60 parts by weight of sand, 5 to 60 parts by weight of clay, 5 to 60 parts by weight of bentonite, 5 to 60 parts by weight of tidal flats, 0.3 to 5 parts by weight of fly ash, and 0.2 to 0.4 parts by weight of calcium sulfate.

The grout material is composed of 35 to 50 parts by weight of a mixture of Portland cement and blast furnace slag in a weight ratio of 6: 4, 0.5 to 5 parts by weight of lime, 40 to 70 parts by weight of sand or aggregate, and 28 to 88 parts by weight of sea water do.

The reason for charging the grout material is to lower the wall 130 to a predetermined position and to grout the grout material between the wall 130 and the slate mound 120 when the curvature of the surface of the slate mound 120 is severe, In order to ensure that

When the iron ore is melted in the blast furnace at a high temperature, the above-mentioned blast furnace slag is separated from the heavy iron component and the remaining slag as the rock component. The slag flows out like a volcanic lava in the blast furnace. , It is rapidly cooled and crushed into sandy small particles, and these small particles are finely pulverized into a cement particle size in a pulverizer.

Such blast furnace slag has the property of hardening like cement when it reacts with water. Therefore, blast furnace slag is used as a substitute for cement.

In addition, blast furnace slag is a cost-effective material compared to cement because it is a by-product of iron ore.

And, by using the characteristics of blast furnace slag, high value added high functional concrete with various applications can be manufactured as shown in Table 1.

In Korea, blast furnace slag is used in various ways, but in Korea, it is only used for simple applications, so it is necessary to prepare various application methods.

Uses of blast furnace slag
Characteristic

Usage
1. Fluidity

Highly dynamic concrete (low-energy construction, improvement of concrete quality, etc.)
2. Large delay effect

Large quantity continuous cast concrete etc.
3. Reheating

Mass concrete (large building foundation etc.)
4. Age 28 days strength

Reduction of unit cement amount etc.
5. Long term strength

Improvement of durability of buildings, reduction of unit cement amount, etc.

6. High Strength

High-rise reinforced concrete building
7. Large water tightness

Underground structures, underwater structures
8. Large salt barrier

Coastal buildings, underwater and underwater buildings, etc.
9. Inland Seawater Large

Marine and underwater structures
10. Chemical resistance

Chemical factory buildings, hot spring buildings, acid rain measures, etc.
11. Alkali reaction inhibition

High durability of buildings

Blast furnace slag, on the other hand, is a potential hydraulic material that can not initiate a self-triggered hydration reaction just by contacting water and an alkaline promoter like Portland cement.

That is, when the slag and water are in contact with each other, a dense impermeable gel thin film is formed on the surface of the slag particles, thereby preventing water from penetrating into the particles and causing no further reaction.

However, when stimulated by alkaline [Ca (OH) ₂ , KOH, NaOH] or sulfate (CaSO ₄ ), the thin film is broken and converted into a gel of the structure. The elution of ions from the slag and the precipitation of insoluble materials, This hydration mechanism is called latent hydraulics.

Slag is bound to Ca (OH) ₂ , which is about 10% of the slag mass in the long run, and Portland cement produces Ca (OH) ₂ at about 25%, so theoretically the blast- Even if it is substituted, the whole amount can be activated.

Characteristics of blast furnace slag concrete

1) Compressive strength

Compressive strength of concrete using blast furnace slag is influenced by blast furnace slag powder content and replacement rate in addition to water binding ratio, aging and curing method.

The compressive strength of concrete using blast furnace slag is almost linearly related to the water binding ratio (weight ratio of water / binder (cement + blast furnace slag)) and the initial strength increase tends to be smaller as the substitution rate is higher, Potential hydropsic reactions lead to a significant increase in strength over time.

However, when the degree of the powder is not less than 6,000 cm 2 / g, the initial strength can be obtained to the same extent as that of no blending.

On the other hand, as the substitution rate increases, the compressive strength generally decreases in early ages, but in long-term ages, the compressive strength increases even if the substitution ratio reaches 70%.

The effect of curing temperature on the compressive strength of concrete admixed with blast furnace slag is more significant than that without blast furnace slag.

That is, when the curing temperature is low, it is confirmed that the initial strength is slowed down, and the initial strength is high when the curing temperature is over 30 ° C.

This tendency is remarkable as the degree of powder is low and the substitution rate is high.

2) Dry shrinkage

The drying shrinkage of concrete using blast furnace slag is slightly different depending on the substitution rate and the degree of powder, but it generally shows a tendency to increase as the substitution rate and powder degree are increased until 5 weeks of drying.

However, after that, the drying shrinkage gradually slows down and shows almost the same tendency as that of ordinary concrete.

3) Neutralization

In concrete using blast furnace slag, the alkalinity of concrete is lowered due to the reaction of Ca (OH) ₂ and blast furnace slag components generated in the hydration reaction of cement, so that the neutralization of concrete proceeds faster than that of ordinary concrete.

Therefore, when using blast furnace slag, it is possible to neutralize the grout material and reduce alkaline contamination of the ground.

In the relation between powder and neutralization, as the degree of powder increases, the grout material becomes tight and the depth of neutralization tends to decrease.

Further, since the depth of neutralization becomes shorter as the initial curing period is longer, sufficient wet curing is important.

4) Water-tightness and water-resistance

The watertightness is improved as the concrete is dense, that is, the amount of pores is small, the pore diameter is small, and the pores are distributed discontinuously.

In grout materials incorporating blast furnace slag, water tightness is improved because the C-S-H gel produced by latent hydraulic properties improves the pore structure.

Such water-tightness enhances resistance to penetration of sulfate ions and chlorine ions.

On the other hand, blast furnace slag reacts with Ca (OH) ₂ in the grout material to form a CSH gel, so that the amount of swelling hydrate generated by the sulfate reaction in Ca (OH) ₂ and seawater can be reduced. Inside water resistance is improved.

This seawater aqueous solution can be improved by adding lime powder to the blast furnace slag, which is known to result from the formation of dense ettringite in the surface layer.

5) Other

[0070] As the replacement rate of blast furnace slag increases, the inhibiting effect of the alkali aggregate reaction is markedly increased, and the resistance to acid resistance and sulfate resistance is greatly improved by the increase of the blast furnace slag replacement rate, It is one of the great advantages of concrete using blast furnace slag.

Comprehensively using blast furnace slag as a grout material has a positive effect in terms of improvement of long-term strength, improvement of watertightness, suppression of hydration heat, improvement of chemical resistance and improvement of economy.

On the other hand, the lime includes calcium oxide (calcium oxide) and calcium hydroxide (calcium hydroxide), preferably calcium hydroxide, which is generally commercially available.

Here, the quicklime is a white lump or powder mainly composed of calcium oxide (CaO).

The limestone mined from the mountains is washed and sorted, and then baked at a high temperature of 900 ° to 1000 ° in a calcining furnace.

Main properties of quicklime

Main ingredient: calcium oxide

Chemical formula: CaO

Food: 56.1

Color: White with high purity, little gray with low purity, band yellow (colored by impurities)

Crystal structure: cubic system

True weight: 3.34

Apparent Specific Gravity: 1.6-2.8

Melting point: CaO 2,572 ° C

Boiling point: 2,850 ℃

Heat of hydration: Generates high temperature when reacted with water.

The slaked lime is produced by reacting calcium oxide (Ca (OH) 2) as a main component with white powder and by reacting the calcium oxide with water.

It is difficult to dissolve in water and shows strong alkalinity.

The main properties of lime

Main ingredient: Calcium hydroxide

Chemical formula: Ca (OH) ₂

Food: 74.1

Color: White powder, white powder than burnt lime

Crystal structure: hexagonal flat plate or prism phase

Specific gravity: 2.24

Appearance: Specific gravity 0.4 ~ 0.55

On the other hand, the seawater contains many kinds of salts dissolved therein, and the total amount of the salts contained in 1 kg of seawater is about 35 g.

Table 2 shows the major components of seawater having a salinity of 3.5%.

Here, the term 'salinity' means 'the total amount of solids contained in 1 kg of seawater in g', indicating that the total amount of NaCl occupies 80% or more of the salts in seawater.

Among these components, Cl, SO ₄ ^{2 -} and Mg ²⁺ strongly affect the hardened cement. Especially, the diffusion rates of these ions in the cured products are as follows.

Cl ^- > SO ₄ ^{2 -} > Na ⁺ > Ca ^{2 +} > Mg ^{2 +}

In other words, it is known that the penetration of the SO 4 ion in the hardened body, which means the penetration of the sulfate, is caused by the reaction with C ₃ A hydrate to generate a material called ettringite, which is an expandable material, to destroy the hardened cement body.

However, the penetration of SO4 ions from seawater into the hardened body is not only limited to the surface layer of the hardened body but also the diffusion rate is much smaller than that of Cl ^- ion. Thus, when the amount of penetration is converted into the amount of penetration, And the concentration in the seawater is about 1/7 of the chlorine ion, so the infiltration amount of the SO 4 ion becomes a small value of one tenth of the Cl ^- ion.

As a result, considering the penetration depth, diffusion rate and concentration in seawater, the effect of Cl ^- ion is higher than that of SO ₄ ^- ion.

Therefore, in consideration of the corrosion resistance of concrete, resistance to chloride should be increased in preference to deterioration of the hardened body by the sulfate.

Major components and concentration of seawater (3.5% of seawater)
ingredient

Concentration (g / kg)
ratio(%) Cl ^- 19,353 55.10 Na ⁺ 10.76 30.60 S0 ₄ ^{2 -} 2.712 7.70 MG ^{2 +} 1.294 3.70 Ca ^{2 +} 0.413 1.20 K ⁺ 0.387 1.10 HCO ^{3 -} 0.142 0.40 Br ^- 0.067 0.19 Sr ^{2 +} 0.008 0.023 B (OH) ^4- 0.004 0.011 F ^- 0.001 0.003

The grout material having the above-described structure mixes the blast furnace slag and the lime with seawater to suppress the weakening of the grout material structure by the sulfate and to generate an initial hydration reaction by mixing calcium hydroxide and seawater to form a strong alkali promoter (water glass, etc.) There is the same effect as the addition.

In other words, it has become clear that there is always a danger that the hydration product of Portland cement will be decomposed in the ground grout material in the marine environment. Therefore, by preparing seawater in lime and blast furnace slag instead of Portland cement, .

1. Portland cement is not used as a grouting material, so that a hydration product, C ₃ A, is not generated, so that it does not make a material (ettringite) which reacts with sulfate to cause volume expansion (ettringite), and therefore does not destroy the microstructure of the ground grout material.

2. Potential hydraulic properties of lime and blast furnace slag change Ca (OH) ₂ into calcium silicate hydrate, which improves watertightness by enhancing strength, which increases resistance to penetration of corrosive substances.

3. The use of blast furnace slag has the advantage that the Friedel salt is formed in the surface layer and the adsorption effect of chloride is increased.

For this reason, it can be seen that a mixed material capable of achieving low heat generation and resistance to seawater at the same time as reducing the initial strength, long-term strength and environmental pollution damage, and particularly, a multi-component mixed type grout material containing blast furnace slag and an appropriate amount of lime is preferable.

On the other hand, sand, clay, tidal flats and the like can be used as an additive in the grout material.

That is, by preparing sand, clay, bentonite, tidal flats, fly ash, calcium sulfate and the like in an appropriate amount by mixing the above grout materials with additives, it is possible to further improve the durability and water resistance of the grout material mainly composed of blast furnace slag and lime There is an effect of strengthening.

The structure of the gravity type harbor structure using the steel file and excavation according to the present invention having the above-described structure can secure the structural stability by integrating the lower gravel mound 120 and the wall 130, It is possible to overcome the limitation of the built-up area and to secure the economical efficiency by using the conventional harbor structure.

Further, by using the steel material file and excavation according to the present invention, it is possible to obtain the same initial strength and long-term strength without using a strong alkali promoter (water glass or the like) by using seawater, It is possible to reduce the damage of environmental pollution and to reduce the discomfort and expense of separately transporting fresh water and the initial viscosity due to the unique chemical action of seawater. Therefore, even if sand is added separately, And there is an effect that the fire-splitting phenomenon of the material does not occur.

Hereinafter, the description will be made of the gravity type port structure using the steel pile and excavation according to the present invention having the above-described construction.

FIGS. 2A through 2E are process diagrams illustrating a conventional gravity type harbor structure using a steel file and excavation according to the present invention.

As shown in these drawings, a gravity type port structure remediation method using a steel file and excavation according to the present invention comprises a foundation ground 110; A sandstone mound 120 constructed on the foundation ground 110; A wall 130 installed on the silt mound 120; A back ground 140 supported by the silt mound 120 and the wall 130; And a capping concrete (150) installed at an upper end of the wall (130), the gravity type port structure (100)

(I) forming the perforation hole 160 by perforating the capping concrete 150 and the wall 130 to a predetermined diameter and depth; (II) inserting a steel pile (170) into the perforation hole (160) and fixing the hydraulic jack (180) on the capping concrete (150) of the steel pile (170); (III) of penetrating the steel pile (170) into the mudstone mound (120) while moving the wall (130) upward by using the hydraulic jack (180); (IV) excavating the stony mound 120 to a certain depth; (V) placing the upwardly displaced wall (130) on the excavated slate mound (120); And a step (vi) of forming additional capping concrete 190 by placing and curing concrete on the capping concrete 150.

Hereinafter, the gravity type harbor structure remediation method using the steel file and excavation according to the present invention will be described in detail.

First, step (I) is a step of preparing the lifting of the pre-installed gravity type harbor structure 100, comprising: a foundation ground 110; A sandstone mound 120 constructed on the foundation ground 110; A wall 130 installed on the silt mound 120; A back ground 140 supported by the silt mound 120 and the wall 130; The capping concrete 150 and the wall 130 of the conventional gravity type harbor structure 100 composed of the capping concrete 150 installed at the upper end of the wall 130 are punched to a predetermined diameter and the surface of the mudstone 120 Thereby forming a perforation hole 160.

Step II is a step of inserting a steel material file 170 into the perforation hole 160 and fixing the hydraulic jack 180 on the capping concrete 150 of the steel material file 170.

Next, step (II-1) fixes and installs the rigid wall 200 between the wall 130 and the back ground 140.

The rigid wall body 200 is installed to prevent collapse of the back ground, and is composed of a main heat-retaining wall (CIP), a slurry wall, and the like.

Subsequently, in step (III), the hydraulic file 180 is used to penetrate the steel material file 170 into the masonry mound 120 so that the weight of the wall body 130 acts on the lower outer circumferential surface of the steel material pile 170, And the sum of the reaction force against the lower outer peripheral surface of the steel material pile 170 and the reaction force against the lower end of the steel material pile 170 is larger than the self weight of the wall body 130 The hydraulic jack 180 which stops at the insertion limit point and rises and falls while pressing the outer circumferential surface of the steel material file 170 by the jacking force causes the hydraulic jack 180 to move toward the wall 130 So as to move upward.

That is, the steel material file 170 is penetrated by using the hydraulic jack 180 installed at the upper end of the steel material file 170, and the steel material file 170 is inserted until the bearing capacity of the steel material file 170 becomes equal to the own weight of the wall body 130 The wall 130 moves upward due to the jacking force when the supporting force of the steel material pile 170 is larger than the self weight of the wall body 130. [

Subsequently, step (IV) is the step of excavating to the required position of the rock mound 120 while advancing the pump dredger.

Step V gradually removes the jacking force of the hydraulic jack 180 while pressing the outer circumferential surface of the steel material file 170 so that the weight of the wall body 130 moved upward moves the wall body 130, Is placed on the excavated sandstone 120.

That is, while the wall 130 is lowered on the masonry mound 120 excavated by the weight of the wall body 130 while the jacking force of the hydraulic jack 180 is slowly removed, the mooring is completed.
For reference, the hydraulic jack 180 of the present invention is one of ordinary hydraulic jacks and is the same as a conventional hydraulic jack and its structure.
The hydraulic jack 180 of the present invention is configured to surround the outer circumferential surface of the steel material file 170 and to move the outer circumferential surface of the steel material file 170 in one direction Riding on the steel pile 170 while being pressed by means similar to sawtooth or one-way sawtooth.
The principle is the same as the principle that a monkey climbs on a tree, and the power of ascending is provided by a hydraulic mechanism.
The capping concrete 150 and the wall 130 are supported by the hydraulic jack 180 such that the hydraulic jack 180 rises and falls between the capping concrete 150 and the wall 130.
However, if the lower end of the steel material pile 170 is lowered below the capping concrete 150 and the wall 130, the capping concrete 150 and the wall 130 And the lower end of the steel material pile 170 penetrates through the mudstone mound 120. As shown in FIG.

Subsequently, step (V-1) adds a step (V-1) of filling the grout material between the wall 130 and the masonry mound 120.

That is, if the surface of the masonry mound 120 is severely curved, the wall 130 may be lowered on the masonry mound 120 and then grout may be filled between the wall 130 and the masonry mound 120. That is, Grout to the ash to secure flatness.

Here, the grout material comprises 30 to 100 parts by weight of blast furnace slag, 3 to 25 parts by weight of lime, and 28 to 88 parts by weight of seawater.

The grout material is composed of 35 to 50 parts by weight of blast furnace slag, 6 to 8 parts by weight of lime, 40 to 70 parts by weight of sand or aggregate, and 28 to 88 parts by weight of seawater.

The grout material is composed of 40 to 60 parts by weight of sand, 5 to 60 parts by weight of clay, 5 to 60 parts by weight of bentonite, 5 to 60 parts by weight of tidal flats, 0.3 to 5 parts by weight of fly ash and 0.2 to 0.4 parts by weight of calcium sulfate.

The grout material is composed of 35 to 50 parts by weight of a mixture of Portland cement and blast furnace slag in a weight ratio of 6: 4, 0.5 to 5 parts by weight of lime, 40 to 70 parts by weight of sand or aggregate, and 28 to 88 parts by weight of sea water .

Next, step (VI) places and cures the concrete on the capping concrete (150) to form additional capping concrete (190).

That is, the additional capping concrete (190) is to further place the concrete on the existing capping concrete (150) in consideration of the purpose of preventing the overflow and utilizing the site.

Subsequently, step (VI-1) is a step of removing the steel file 170.

That is, the pre-installed steel files 170 are to be removed in consideration of the site conditions.

The gravity type port structure remediation method using the steel file and excavation according to the present invention having the above-described steps can ensure the structural stability by integrating the stone mound 120 and the wall 130, It is possible to overcome the limit, and it is possible to secure economical efficiency by constructing using conventional harbor structures.

In addition, the gravity type port structure remediation method using the steel file and excavation according to the present invention can achieve the same initial strength and long-term strength without using a strong alkali promoter (such as water glass) by using sea water, It is possible to reduce the damage of environmental pollution and to reduce inconvenience and expense of separately transporting fresh water and to generate initial viscosity due to the unique chemical action of seawater, And there is an effect that the fire-splitting phenomenon of the material does not occur.

100: gravity type port structure 110: foundation ground
120: Stony mound 130: Wall
140: Back ground 150: Capping concrete
160: perforation hole 170: steel file
180: Hydraulic Jack 190: Additional Capping Concrete
200: Rigid wall

Claims (4)

delete delete delete A foundation foundation 110; A sandstone mound 120 constructed on the foundation ground 110; A wall 130 installed on the silt mound 120; A back ground 140 supported by the silt mound 120 and the wall 130; And a capping concrete (150) installed at an upper end of the wall (130), the gravity type port structure (100)
(I) forming the perforation hole 160 by perforating the capping concrete 150 and the wall 130 to a predetermined diameter and depth;
(II) inserting a steel pile (170) into the perforation hole (160) and fixing the hydraulic jack (180) on the capping concrete (150) of the steel pile (170);
The hydraulic file 180 is used to penetrate the steel material file 170 into the sandstone mound 120 so that the weight of the wall body 130 is equal to the sum of the frictional force against the lower outer circumferential surface of the steel material pile 170 and the reaction force against the lower end And when the sum of the frictional force against the lower outer circumferential surface of the steel material file 170 and the reaction force against the lower end is larger than the self weight of the wall body 130, the steel material file 170 is inserted The hydraulic jack 180 which stops at the limit point and rises and rises while pressing the outer circumferential surface of the steel material file 170 by the jacking force causes the wall 130 to move upward by raising the wall 130, Moving upward;
(IV) excavating the stony mound 120 to a certain depth;
The jacket force of the hydraulic jack 180 is slowly removed while pressing the outer peripheral surface of the steel material file 170 so that the wall body 130 is lifted up by the weight of the upwardly moved wall body 130, (V);
And a step (vi) of forming additional capping concrete (190) by pouring and curing concrete on the capping concrete (150), and a step of gravity type port structure remediation using excavation.

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