KR101697017B1 - Underwater construction method of concrete-piling retaining-wall structure using automatic stripping formwork - Google Patents

Abstract

The present invention relates to a method of constructing a concrete diaphragm wall underwater using automatic separating molds to construct a quay wall of a port structure comprising: a first step of manufacturing a jig frame to install pin piles used as supporters at preset positions and preset intervals; a step of transferring the jig frame to sea; a third step of fixating jigs to the present parts of the transferred jig frame; a fourth step of hitting the pin piles on the seabed using the fixated jigs; a fifth step of excavating the seabed where a concrete diaphragm wall should be installed with a ground excavating device; a sixth step of installing molds in the excavated seabed; a seventh step of placing concrete into the molds wherein a concrete placing device is installed; an eighth step of curing the placed concrete; and a ninth step of separating the molds from the cured concrete.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a concrete wall by using an automatic demolding formwork,

The present invention relates to a method of constructing a continuous wall of underwater concrete. More specifically, a pin pile is fixed in the water by using a jig frame, and a concrete continuous wall is manufactured by submerging the concrete after the ground is poured, and the construction method for shortening the air by using the automatic deforma- tion form .

The quay wall is a wall moored to the ship at the time of unloading, and it is a wall structure that can withstand the earth pressure. It is a gravity type, sheet pile type, cell type, pierced type, Dolphin, and mooring buoys.

Conventionally, when constructing the concrete wall for the wall construction, generally, the construction area is buried and landed, the concrete wall is punched and the concrete is laid in the ground. However, there is a problem in that time and cost for landfilling the landfill and landfill are large.

In order to compensate for this, a method of installing a direct wall in the water has been proposed, and a method of constructing and installing a wall having a block-type structure has been proposed.

The gravity type wall having a block-type structure has a steel structure for moving a block inside a concrete block when the block is manufactured, a part of the steel structure is formed so as to protrude above the concrete block, To form a quay wall structure.

And concrete block is applied with construction method applying precast block. The precast block means that the construction is performed through additional fixation such as additional installation in the field after the predetermined divided structures are made in advance in the production process. However, also in the case of the precast block, there is a problem that it is difficult to be firmly coupled between the blocks, and there is a problem that a clearance is generated and the runoff penetrates or the gravel is collapsed to weaken the ground.

Therefore, there is a need for a concrete continuous wall construction method in which concrete is poured into water in order to shorten the air and reduce the construction cost by eliminating the pre-landing work.

Korean Patent Registration No. 10-1061984 U.S. Patent Application Publication No. 6,082,928

It is an object of the present invention to provide a method for constructing an underwater concrete continuous wall structure that does not require a pre-landing operation.

Also, it is an object of the present invention to provide a user with a method of constructing an underwater concrete continuous wall which is easy to install and dismantle concrete, curing and form using the automatic demolding formwork.

Also, it is an object of the present invention to provide a user with an underwater concrete continuous wall construction method capable of improving the accuracy of installation position of an automatic demolding formwork through construction of a pin pile using a jig.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

A concrete continuous wall underwater construction method for constructing a seam of a port structure in water, which is related to an example of the present invention for realizing the above-mentioned problems, A second step of moving the jig frame to the water phase, a third step of fixing the jig at a predetermined position in the moved jig frame, a step of fixing the jig frame to the underside by using the fixed jig, A fifth step of excavating the seabed ground where the concrete continuous wall is located, a sixth step of installing a concrete form on the excavated seabed ground, a fourth step of constructing the concrete installation device on the ground, A seventh step of pouring concrete into the cured concrete, an eighth step of curing the poured concrete, Standing that disassembly may include a ninth stage.

Also, the dies are connected to each other by a hinge structure, so that the dies are easily separated from the cured concrete continuous wall, and the cured concrete plate and the dowry are lifted, It can be an automatic demolding die.

In the third step, at least four pin files are used, and one end may be fixed to the seabed ground.

In the fifth step, the land stabilization device may further include the step of injecting the land stabilizer into the seabed ground.

The ninth step may further include a step of moving the die in which the die moving means has been disassembled.

In addition, a plurality of sets are provided with the pin and the form as a set, and the first set of the plurality of sets proceeds through the first through ninth steps to construct a concrete continuous wall, The second set of the plurality of sets can be moved from the first step to the ninth step at a position adjacent to the concrete continuous wall to construct the concrete continuous wall.

The present invention eliminates the need for pre-landing operations, thereby reducing the construction time.

In addition, by using automatic deformation formwork, it is easy to install and dismantle concrete, curing and formwork, reduce construction time, and make construction easier.

Also, through the construction of the pin pile using the jig, it is possible to improve the accuracy of the installation position of the automatic demolding formwork.

In addition, it is possible to construct continuous walls more easily by using a plurality of sets with one set of pin files and a form.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate a preferred embodiment of the invention and, together with the description, serve to provide a further understanding of the technical idea of the invention, It should not be construed as limited.
Figures 1a and 1b are photographs and drawings of an automatic demolding formwork which can be used in the present invention.
FIG. 2 is a flow chart of a concrete continuous wall underwater construction method applicable to the present invention. FIG.
FIGS. 3A to 3E are diagrams for explaining each step of a concrete continuous wall underwater construction method applicable to the present invention. FIG.
4 shows a concrete continuous wall produced according to the method of the present invention.
5A to 5D illustrate an example of a method of successively constructing a concrete continuous wall according to the construction method of the present invention.

Conventionally, when constructing the concrete wall for the wall construction, generally, the construction area is buried and landed, the concrete wall is punched and the concrete is laid in the ground. However, there is a problem in that time and cost for landfilling the landfill and landfill are large.

Also, in the case of the precast block, there is a problem that it is difficult to firmly connect the blocks, and there is a problem that a gap is generated and the water is infiltrated or the soil is collapsed to weaken the ground.

Therefore, there is a need for a concrete continuous wall construction method in which concrete is poured into water in order to shorten the air and reduce the construction cost by eliminating the pre-landing work.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method of constructing an underwater concrete continuous wall that requires no land landing.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the contents of the present invention described in the claims, and the entire configuration described in this embodiment is not necessarily essential as the solution means of the present invention.

<Concrete continuous wall construction system configuration>

Figures 1a and 1b are photographs and drawings of an automatic demolding formwork which can be used in the present invention.

The concrete continuous wall construction system 10 includes a crane 100, a jig frame (not shown), a pin pile 200, an automatic demolding formwork 300, a ground excavator (not shown), a concrete pouring device (Not shown), and a land stabilization device (not shown).

A jig frame (not shown) is used for the pin file 200 to be installed at a designated position, and is made of a jig that assists the pin file to be installed at predetermined intervals in a predetermined position of the seabed ground .

The pin pile 200 is used as a support for underwater construction of the concrete continuous wall at a designated location. The pin pile 200 is constructed so as to be embedded in the bottom of the seabed and the pin pile 200 installed on the seabed ground serves to support the automatic deforma- tion formwork 300 used for manufacturing the concrete continuous wall 400 And after the concrete continuous wall 400 is manufactured, it serves to support the concrete continuous wall 400. That is, the pin file 200 has a role of designating the underwater production position of the concrete continuous wall 400, a role of supporting the cutter of the continuous concrete wall 400 to be manufactured, and a function of supporting the finished concrete continuous wall 400 It plays a role.

At this time, the interval, the construction depth, and the diameter of the pin piles 200 may vary depending on the size of the concrete continuous wall 400 to be installed, the ground condition of the seabed, the marine condition, and the installation purpose of the wall. When the pin file 200 is constructed, a membrane can be installed to prevent seawater from flowing between the pin files.

It is preferable that at least four or more pin piles 200 are used when one concrete continuous wall 400 is installed, and it is more preferable that the four pin piles 200 are located in a vertex region of a rectangle.

Referring to FIGS. 1A and 1B, the automatic demolding mold 300 is a mold for curing the concrete continuous wall 400 at a specified position using the pin pile 200 as a support. In the case of manufacturing the concrete continuous wall 400 in the water, the installation of the formwork and the demolding operation in the completed concrete have a high degree of difficulty and a great time and cost problem. When using the automatic deforma- tion mold 300 to solve this problem, it is possible to greatly shorten the time and cost of demoulding.

At this time, the automatic demolding formwork 300 can be constructed such that the form plate 330 and the formworks 310 and 320 are connected to each other by a hinge 311 structure or by a hinge 311 between the formworks 310 and 320, When the curing of the concrete is completed, the form plate can be quickly separated from the concrete continuous wall 400 using the hinge 311 structure. In addition, when the automatic demolding formwork 300 is lifted using a form moving means such as a crane 100, the automatic demolding formwork 300 can be demolded from the concrete continuous wall 400 quickly and safely.

The automatic demolding mold 300 can transmit data for judging the degree of curing of the concrete laid in the formwork and can be demolded and demolded in the cured concrete when the curing of the concrete is completed. It is possible to estimate the maturity and compressive strength of the concrete using the poured concrete temperature data transmitted to the outside and the poured concrete temperature data received from the outside, and to determine the demolding time. At this time, the maturity of the concrete is calculated by the Nurse-Saul function or the equivalent age by the Arrhenius equation, and the compressive strength of the concrete can be calculated by the formula of the ACI strength estimation equation. After the concrete is poured roughly, it is demolded for 7 to 10 days.

The ground excavation apparatus (not shown) is an apparatus for excavating the seabed ground where the concrete continuous wall 400 is to be located. The bottom of the seabed can be excavated and released to the ground. It is also desirable to excavate the seawater contained in the seabed soils at the time of excavation of the seabed. At this time, the depth of excavation of the ground layer may vary depending on the size of the concrete continuous wall 400 to be installed, the ground condition of the seabed, the marine condition, and the installation purpose of the quay wall. However, since there is a problem that the bottom of the seabed can be weakened during excavation, it is desirable to judge the condition of the seabed ground in real time and to excavate it in real time.

A land stabilization device (not shown) is a device for inputting land stabilizers to stabilize the seabed ground when the excavator digs the seabed. The land stabilizer removes the instability of the seabed so that the concrete continuous wall 400 can be stably installed and maintained on the seabed. In addition, the land stabilizer injecting apparatus can put the land stabilizer into the seabed while replacing the seawater existing in the automatic deforestation form with the land stabilizer after the automatic deforma- tion formwork 300 is installed.

The concrete pouring device (not shown) is a device for pouring the concrete 420 into the automatic pouring mold 300. At this time, the reinforcing cage 410 can be installed before the concrete is poured.

The components of such a system may be composed of a plurality of, and at the same time, be configured to produce two or more concrete continuous walls 400. As an example, a plurality of sets of the pin file 200 and the automatic demold formwork 300 can be formed, and a plurality of concrete continuous walls 400 can be simultaneously or sequentially manufactured and constructed.

<Concrete continuous wall construction method>

Referring to the drawings, a construction method of the concrete continuous wall 400 will be discussed.

FIG. 2 is a flow chart of a concrete continuous wall underwater construction method that can be applied to the present invention, and FIGS. 3A to 3E are operation diagrams for each step of a concrete continuous wall underwater construction method applicable to the present invention.

Referring to the flow chart of FIG. 2, when the concrete continuous wall 400 is examined, the concrete continuous wall 400 is manufactured by forming a jig frame 110 for constructing the pin pile 200 used as a support (S110) . The jig frame 110 may be used to fix the pin file 200 to a designated position and may include a jig to assist the pin file to be installed at predetermined intervals in a predetermined position of the submarine ground.

After the frame 110 is manufactured, a step of moving the jig frame to the pre-set water level to which the concrete continuous wall 400 is to be installed is performed (S120).

After the jig frame is moved to the pre-set water level, the step of fixing the jig to the predetermined position in the moved jig frame 110 (S130) is proceeded.

After the jig is fixed at the predetermined position, step (S140) of applying the pin pile (200) to the seabed ground using the jig (see Fig. 3A) proceeds. At this time, the pin pile 200 is used as a support to construct a concrete continuous wall in a designated position in water. It is preferable that the pin piles 200 are installed so as to be partially embedded in the bottom of the seabed and the size of the concrete continuous wall 400 to be installed and the size of the pin piles 200 The spacing, the construction depth, and the diameter of the pin piles 200 may vary. In addition, a membrane may be installed to prevent the seawater from flowing into the pin piles 200 when the pin piles 200 are installed.

After finishing the fin 200 on the seabed, the ground excavator proceeds to excavate the seabed 150 (see FIG. 3B). The bottom of the seabed can be excavated and released to the ground. It is also desirable to excavate the seawater contained in the seabed soils at the time of excavation of the seabed. At this time, the digging depth of the ground excavating device may vary depending on the size of the concrete continuous wall 400 to be installed and the installation purpose of the seabed ground condition, the marine condition, and the quay wall. In addition, it is desirable to inject the land stabilizer to stabilize the seabed ground when excavating the ground.

After the submarine ground is excavated, a step (S160) (see FIG. 3C) is performed in which the formwork is installed on the excavated submarine ground. At this time, the form is preferably used by the automatic deforma- tion formwork 300 in terms of construction time and cost. And, when the form is installed, the sea water in the form can be removed by putting the land stabilizer.

After the formwork 300 is installed, the concrete pouring apparatus advances the step (see FIG. 3E) of placing the concrete in the formwork 300 (S170). At this time, a reinforcing cage can be arranged (see Fig. 3d). Whereby the concrete continuous wall 400 can be manufactured which has strength in the water.

After the concrete is poured, the step of curing (S180) of the poured concrete proceeds, and generally, it takes 7 to 10 days after pouring the concrete. The degree of curing can be judged by using the maturity and compressive strength of the concrete calculated using the pouring concrete temperature data. At this time, the maturity of the concrete is calculated by the Nurse-Saul function or the equivalent age by the Arrhenius equation, and the compressive strength of the concrete can be calculated by the formula of the ACI strength estimation equation.

After the concrete is cured, a disassembly process (S190) proceeds in the concrete in which the mold is cured. At this time, the formwork 300 can be rapidly formed by using the structure of the hinge 311 when the curing of the concrete is completed, ). &Lt; / RTI &gt; In addition, when the automatic demolding formwork 300 is lifted using a form moving means such as a crane 100, the automatic demolding formwork 300 can be demolded from the concrete continuous wall 400 quickly and safely.

Meanwhile, referring to FIG. 4, the manufactured concrete continuous wall through the construction method as described above is constructed such that the pin pile 200 is installed on the seabed ground and then the automatic demolding formwork 300 and the manufactured concrete continuous wall 400 are supported .

5A to 5D illustrate an example of a method of successively constructing a concrete continuous wall according to the construction method of the present invention.

Referring to FIG. 5A, in the method of constructing the concrete continuous wall 400, a plurality of concrete continuous walls 400 may be simultaneously constructed.

A plurality of sets can be provided with one set of the pin file 200 and the form 300 and the concrete continuous wall 400 can be constructed adjacent to the plurality of sets. At this time, each of the sets proceeds through steps S110 to S190 to construct the concrete continuous wall 400.

Referring to FIGS. 5B and 5C, when the concrete continuous wall 400 is completed by completing steps S110 through S190 among the plurality of sets, the set moves to a position adjacent to the last installed set.

Referring to FIG. 5D, the moved set is newly formed through the steps S110 to S190 to generate the concrete continuous wall 400. FIG.

Through the construction system and the construction method as described above, it is possible to provide a user with an underwater concrete continuous wall construction system and a construction method which do not require a pre-landing work.

100: Crane
200: Pin File (Pin Pile)
300: Automatic demolding formwork
310:
311: Hinge
320:
330: Die plate
400: Concrete continuous wall
410: reinforced cage
420: Concrete

Claims (6)

A method of constructing a concrete continuous wall underwater for constructing a port wall of a port structure in water,
A first step of fabricating a jig frame for constructing a pin file used as a support at a predetermined position at predetermined intervals;
A second step of moving the jig frame to the awards;
A third step of fixing the jig at a predetermined position in the moved jig frame;
A fourth step of directing the pin piles to the seabed using a fixed jig;
A fifth step of excavating a seabed ground on which the concrete continuous wall is placed by a ground excavating device;
A sixth step of installing the formwork on the excavated submarine ground;
A seventh step of pouring concrete into the mold provided with the concrete pouring device;
An eighth step of curing the poured concrete; And
And a ninth step in which the mold is disassembled in the cured concrete,
The mold,
The form plate and the dice are connected by a hinge structure so that the form plate is easily separated from the cured concrete continuous wall,
And an automatic demolding die for demolding the cured concrete continuous wall by lifting the separated form plate and the form dhow,
In the fifth step,
Further comprising the step of introducing the land stabilization liquid into the above-mentioned submarine ground,
In the ninth step,
And moving the die, wherein the die moving means disassembled,
A plurality of sets are provided by using the pin piles and the form as a set,
The first set of the plurality of sets proceeds from the first step to the ninth step to construct the concrete continuous wall,
Characterized in that the second set of the plurality of sets performs the first to ninth steps at a position adjacent to the concrete continuous wall in which the first set is installed to construct the concrete continuous wall. Construction method.
The method according to claim 1,
In the third step,
Characterized in that at least four of said pinfiles are used and one end is fixed to said seabed ground.
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