KR101527431B1 - Block anchor with pre-bored multi-grout and method for constructing thereof - Google Patents

Abstract

The present invention relates to an anchor block for a multi-grout anchor, comprising: a multi-grout anchor installed on a submarine rock by preceding excavation; and an anchor block installed on the multi-grout anchor to form a large anchor, And a method of constructing the same. The grout hose for supplying grout is accommodated in a rod inserted therein, and as the rod is excavated on the rock bed of the sea bed, the rock is embedded in the rock plate. In a state where the grout is embedded in the rock plate, And a fusing portion formed by a grout supplied from the grout hose at a lower end portion of the steel wire embedded in the rock block, and a plurality of grout anchors having a hollow interior, And a plurality of pipe tubes through which the rod and the steel wire can pass, wherein the rod is inserted in the floating state, the rod is inserted, the steel wire is inserted, and the grout is supplied Is used as a work place where a forming operation of a fixing unit is performed, And an anchor block which is supplied to the inside of the multi-grout anchor through the water supply port and is settled on the rock on a vertical upper side of the multi-grout anchor, is implemented by a preceding excavated multiple grout block anchor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-grouting block anchors,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor for supporting a marine structure in a marine state by being installed on an undersea rock, and more particularly, to a multi-grout anchor installed on a submarine rock by a preceding excavation and an anchor block installed on the multi- The present invention relates to a pre-excavated multi-grout block anchor for increasing the supporting force for fixing and restraining a marine structure by constituting an anchor body and a construction method thereof.

Generally, anchors are installed on the sea bed rocks to support floating offshore structures such as oil drilling facilities or wind power facilities on the sea, or to restrain and limit the movement of offshore structures.

Particularly, in order to construct an anchor with a large bearing capacity on the sea floor, anchor is installed by excavating the bottom surface of the sea floor, placing the anchor, and performing the cover. However, this method has a problem that environmental pollution occurs due to excavation and cover.

Another method is to lower the file from the barge to the sea floor and install an anchor at the bottom of the file, but rotate the file to put the anchor on the sea floor. However, there is a problem in that the installation method of the anchor using the file is not possible in the area where the depth is deep.

On the other hand, in Patent Document 1 of the following prior art document, a hydraulic jack is fixedly installed at the lower end of a suction file, the upper end of the suction file is connected to a crane in the sea, the anchor is coupled to a suction file by a hydraulic jack, A suction pile anchor is provided in which the suction pail is separated and installed by the operation of the hydraulic jack. This suction file anchor can solve the problem of environmental pollution because it does not require excavation or cover, but it is difficult to construct an anchor of large capacity. Therefore, the supporting force (ie, anchor capacity) There is a limit.

In addition, in Patent Document 2, the hook member is inserted into the bottom of the seabed to an extent required for the suction file anchor, and then the hook member protrudes from the suction anchor to the side of the suction file anchor to penetrate the ground, thereby increasing the pull- The anchor is shown, but it is impossible to install it in the rocky area.

[Patent Document 1] Korean Registered Patent No. 10-0459985 (Name: Suction file anchor, Patent person: Daewoo Engineering & Construction Co., Ltd., Bang Sang Chul) [Patent Document 2] Korean Registered Patent No. 10-1220056 (entitled: Hook protruding suction file anchor and method of applying the same, Patent owner: Hyundai Engineering & Construction Co., Ltd.)

Conventional general anchors are difficult to construct large-capacity anchors, and it is difficult to install them in submarine rocky areas. Therefore, there is a problem that a bearing capacity (i.e., anchor capacity) capable of fixedly restraining a marine structure is limited.

In the case of an anchor that is installed using a file among conventional anchors, it is impossible to construct the anchor in a deep water depth region.

The main object of the present invention is to solve the above-mentioned problems of conventional anchors of the present invention. The main object of the present invention is to provide a large-capacity anchor, which is capable of greatly increasing a supporting force capable of restraining a marine structure, Block anchor and a construction method thereof.

Another object of the present invention is to provide a pre-excavated multi-grout block anchor which can be installed in shallow depths or deep water depths, and a construction method thereof.

In order to achieve the above object, according to the present invention, a grout hose for supplying grout is accommodated in a rod inserted therein, and as the rod is excavated on a rock of a sea bed, the grout is embedded in the rock, A plurality of steel wires connected to the sea structure while being extended into water and having a fixing portion formed by a grout supplied from the grout hose at a lower end of a steel wire embedded in the rock; And a plurality of pipe tubes through which the rod and the steel wire can pass, wherein the rod and the steel wire are inserted in the floating state, Into a work place where a forming operation of a fusing part is performed by filling and supplying the grout And an anchor block which is used to supply water to the inside through the water supply port when the waterfall sinks on the rock bed, and sinks on the rock on a vertically upper part of the multiple grout anchors.

In this configuration, one side may further include a connector connected to a part of the steel wire extended in the water through the pipe tube of the anchor block, and the other side connected to the marine structure.

delete

In addition, in the above-described structure, the anchor block may be provided with pulleys for collecting the ends of a portion extending in the water of the steel wires at one point and connecting the steel wires to the sea structure, .

(A) constructing a worksite at a fixed location on the sea where the preceding excavated multi-grout block anchors are to be constructed; (b) placing the grout hoses for grouting, (C) inserting the rod into the rock in a state in which a portion of the steel wire is extended into the water as the rod is inserted, and then passing through the grout hose (D) drawing out the rod into which the grout hose has been inserted; (e) removing the grout hose from the anchor provided with the plurality of through holes, A block is formed on the ground and a part of the steel wire extending in the water is passed through the through hole, while vertically above the multi-grout anchor And (f) connecting a part of the steel wire passing through the through hole of the anchor block to the side of the sea structure. The present invention also provides a method of constructing a preceding excavated multiple grout block anchor.

In the step (f), the connecting member having one side fixed on the side of the marine structure, and a part of the steel wire is collected and fixed to the other side of the connecting member, As shown in FIG.

(G) disposing an anchor block in a floating state, the anchor block having a hollow pipe inside and a pipe through which pipes are installed, at a fixed position of the sea to be installed with the preceding excavated multi-grout block anchor; and (h) Inserting the rod into the rock bed of the seabed through the pipe through a perforator in a state where the grout hose for supplying grout receives the steel wire to the rod inserted therein and (i) Filling the grout with the grout through the grout hose to form a fusing part at the lower end of the steel wire to allow the steel wire to be partially embedded in the rock, (K) supplying water to the inside of the anchor block; (l) disposing the anchor block (M) connecting a part of the steel wire passing through the pipe of the anchor block to the side of the marine structure by the self weight of the anchor block and vertically above the multiple grouting anchors along the steel wire The present invention also provides a method of constructing a preceding excavated multi-grout block anchor.

In the step (m), a connecting body having one side fixed to the sea structure is provided, and a part of the steel wire is collected and fixed to the other side of the connecting body, so that a part of the steel wire is connected to the sea side As shown in FIG.

According to the present invention constructed as above, it is possible to construct a large-capacity anchor with multiple grout anchors and anchor blocks, thereby greatly enhancing a supporting force capable of restraining and fixing the sea structure. In accordance with the embodiment, Or an area with a deep water depth.

1 is a cross-sectional view of a perforator rod used in the construction of a multiple grout anchor in the present invention.
2 is a view illustrating a construction of a multiple grout anchor in a first embodiment of a construction method of the present invention.
3 is a view showing a marine structure moored according to a first embodiment of a construction method of the present invention.
4 is a view illustrating a construction of a multiple grout anchor in a second embodiment of the construction method of the present invention.
5 is a view illustrating an installation of an anchor block in a second embodiment of the construction method of the present invention.
6 is a view showing a marine structure moored according to a second embodiment of the construction method of the present invention.
7 is a process flow chart of the first embodiment of the construction method of the present invention.
Fig. 8 is a process flow chart of the second embodiment of the construction method of the present invention. Fig.
9 is a view illustrating a mooring method of a marine structure for a block anchor constructed according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it should be understood that the following embodiments are provided so that those skilled in the art can understand the present invention without departing from the scope and spirit of the present invention. It is not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, embodiments of the construction of a preceding excavated multiple grout block anchor according to the present invention will be described.

FIG. 1 is a sectional view of a perforator rod used for constructing a multiple grout anchor in the present invention, and FIGS. 2 and 3 illustrating a construction method of the present invention show an embodiment of a construction of a preceding excavated multiple grout block anchor of the present invention have.

As shown in these drawings, the first embodiment of the preceding excavated multi-grout block anchor according to the present invention comprises a multiple grout anchor 10 and an anchor block 20, and the detailed structure thereof is as follows.

The multiple grout anchor 10 includes a plurality of steel wires 11 that are embedded in the rock R of the seabed so that the upper part of the grout extends into the water and is connected to the side of the sea structure S, And a fixing portion 12 formed by grouting composed of a material such as cement milk or mortar at a lower end portion of the steel wires 11.

Particularly, in order to construct the multiple grout anchor 10, a means to be mounted on a perforator as shown in Fig. 1 is used. This means includes an outermost rod 30 and an inner circumferential surface of the rod 30, And the grout hose 40 is also supplied with the steel wire 11. The steel wire 11 is accommodated in the rod 30 separately from the grout hose 40. [ Therefore, the steel wire 11 is buried together with the rock R as the rod 30 is excavated on the rock R of the sea bed in a state where the grout hose 40 is accommodated in the rod 30 inserted therein . The grout is supplied to the lower end side of the steel wire 11 along with the compressed air through the grout hose 40 and cured. When the curing is completed, a fixing part 12 of a spherical shape is formed at the lower end of the steel wire 11 . The grout hose 40 fixed to the inner circumferential surface of the rod 30 is pulled out together with the rod 30 when the rod 30 is pulled out from the sea bed rock R. On the other hand, And remains fixed on the rock R. The plurality of steel wires 11 and the fusing part 12 are provided on the rock R by using the rods 30 in which the steel wire 11 and the grout hose 40 are inserted respectively in this manner, 10).

The anchor block 20 is made of concrete on the land, for example, and is transported to an anchor construction site using a barge. The anchor block 20 is submerged on the rock R in the vertical direction above the multiple grout anchor 10 to function as an anchor. As shown in the enlarged view of FIG. 3, the anchor block 20 has a plurality of through holes 21 through which an upper portion of the steel rods 11 extending in the water of the multiple grout anchors 10 passes.

The upper portion of the steel wire 11 extending into the water is passed through the through hole 21 of the anchor block 20 while the multiple grouting anchor 10 is embedded in the rock R, The ends of the upper part of the steel wires 11 passing through the through holes 21 are gathered at one point and connected to the side of the sea structure R from the upper side of the multiple grout anchor 10 The multiple grouting anchor 10 and the anchor block 20 together act as a large anchor body with a greatly increased supporting force for fixing and restraining the sea structure S. [ On the other hand, the diver's input may be needed during this process.

When a distal end of an upper portion of the steel wires 11 is connected to the side of the sea structure S, a connecting body 50 such as a large chain or cable having one side fixed to the sea structure S is prepared The ends of the upper part of the steel wires 11 may be connected to the other side of the connecting body 50 and the ends of the upper part of the steel wires 11 may be collected at one point as shown in the right side of FIG. ). ≪ / RTI > On the other hand, by adjusting the number of multiple grout anchors and the aspect ratio of multiple grout anchors, it is possible to flexibly cope with mooring load and direction of anchor.

On the other hand, when the ends of a portion of the steel wires 11 extending in the water are collected at one point and connected to the side of the sea structure S, the steel wires 11 are smoothly bent Pulleys 22 may be provided.

The preceding excavated multiple grout block anchors of the first embodiment described above are suitable for mooring the offshore structure S at a shallow water depth.

4, 5 and 6 show a second embodiment of a preceding excavated multi-grout block anchor according to the present invention.

The preceding excavated multiple grout block anchors of the second embodiment are also composed of the multiple grout anchors 110 and the anchor blocks 120 as in the first embodiment described above.

The multiple grout anchors 110 include a plurality of steel wires 111 that are embedded in the rock R of the seabed and the upper portion of which extends into the water to be connected to the side of the sea structure S, And a fusing part 112 formed by a grout composed of a material such as cement milk or mortar at the lower end of the steel wires 111. This is the same as the multiple grout anchor 10 of the first embodiment described above.

The means for mounting the perforator for constructing the multiple grout anchor 110 also includes an outermost rod 30 and a grout hose 30 provided on the inner circumferential surface of the rod 30 for supplying grout, And the steel wire 111 is accommodated in the rod 30 separately from the grout hose 40 (see FIG. 1). Therefore, as in the first embodiment, the steel wire 111 is inserted into the rod 30 in which the grout hose 40 is inserted, and the rod 30 is excavated on the rock R of the seabed, ). When the grout is supplied to the lower end side of the steel wire 111 through the grout hose 40 together with the compressed air and curing is completed, a fixing part 112 having the same shape as the sphere is formed at the lower end of the steel wire 11. The grout hose 40 fixed to the inner circumferential surface of the rod 30 is pulled out together with the rod 30 when the rod 30 is pulled out from the sea bed rock R. On the other hand, And remains fixed on the rock R. The plurality of steel wires 111 and the fusing part 112 are installed on the rock R by using the rods 30 in which the steel wire 111 and the grout hose 40 are inserted respectively in this manner, 110).

Unlike the anchor block 20 of the first embodiment, the anchor block 120 has a hollow structure, and has a water supply port 121 for supplying seawater or the like to the inside of the hollow block . In addition, pipe tubes 122 through which the rod 30 and the steel wires 111 can pass are provided in the vertical direction of the anchor block 120. Therefore, the anchor block 120 can be formed by embedding the rod 30 to construct the multi-grout anchor 110 in the floating state, forming the fusing portion 112 by embedding the steel wire 111 and supplying grout, It is also used as a workplace where work is done. After the construction of the multiple grout anchors 110 is completed, water is supplied to the inside through the water supply port 121 and is settled on the rock R in the vertical direction above the multiple grout anchors 110, thereby forming the multiple grout anchors 110 ) To function as an anchor.

That is, when the multiple grout anchors 110 are installed in the rock R, if water is supplied to the inside of the anchor block 120 through the water supply port 121, the anchor block 120 sinks into the water due to its own weight At this time, the anchor block 120 is submerged on the rock R from above the multiple grout anchor 110 along the steel wire 111 passing through the pipe tube 122 of the anchor block 120. The ends of the upper part of the steel wires 111 passing through the pipe pipes 122 are collected at one point and connected to the side of the sea structure S so that the multiple grout anchor 110 and the anchor block 120 together The large anchor body which has a greatly increased supporting force for restraining and fixedly holding the movable body S is obtained. A method of connecting the distal end of an upper portion of the steel wires 11 to the side of the sea structure S is the same as that of the first embodiment. In FIG. 6, a connection such as a large chain or cable having one side fixed to the sea structure S The body 50 is prepared and the distal ends of the upper portions of the steel wires 111 are connected to the other side of the connector 50 to connect them.

In the anchor block 120, the ends of a portion of the steel wires 111 extending in the water are gathered at one point and connected to the side of the sea structure S. In the second embodiment, Pulleys 123 may be provided for smoothly bending the pulleys.

In the following, embodiments of a construction method of a preceding excavated multiple grout block anchor according to the present invention will be described.

Fig. 7 is a process flow chart of the first embodiment of the construction method of the present invention, and will be described with reference to Figs. 2 and 3. Fig.

In the first step (a) of the first embodiment of the construction method of the present invention, the work site W is constructed at a fixed position of the sea where the preceding excavated multiple grout block anchor of the present invention is to be installed (S1). This work site (for example, jack-up pants) is fixed to the undersea rock R by the support table W1, and equipments such as the perforator M are mounted.

In the second step (b), the rod 30 for embedding the steel wires 11 constituting the multiple grout anchor 10 to be used in the present invention in the rock R is inserted into the rock R (S2). A grout hose 40 for supplying grout is inserted into the rod 30 and the steel wire 11 is inserted into the rod 30. The insertion of the rod 30 is performed by a perforator M ) Is used for excavation.

In the third step (c), as the rod 30 is inserted into the rock R, a portion of the steel wire 11 is embedded together with the rock R in a state of being extended into the water (S3-1). A grout (for example, cement milk or mortar) is supplied through the grout hose 40 inserted into the rod 30 to form a spherical-shaped fixing part 12 to form the multiple grout anchor 10 (S3-2). According to this method, the grout is supplied to the lower end of the steel wire 11 while feeding compressed air to the grout such as cement milk or mortar, and the grout is supplied through the grout hose 40, After the compressed air is discharged, the curing is performed for a predetermined period of time, thereby forming the fixing unit 12.

In the fourth step (d), the rod 30 inserted in the rock R is taken out to the outside (S4). The grout hose 40 fixed to the inside of the rod 30 is drawn out together with the rod 30 and the steel wire 11 is fixed to the rock R by the fixing portion 12 at the lower end thereof And remains in a fixed state. The steps (b) to (d) are repeated to form a plurality of fixing units 12.

In the fifth step (e), the anchor block 20 is submerged on the rock R in the vertical direction above the multi-grout anchor 10 completed in the step (c) (S5). The anchor block 20 is previously manufactured on the land and is transported to a construction site by using a barge or the like and the anchor block 20 has a plurality of through holes 21 so that the anchor block 20 is connected to the multi- The upper portion of the steel rods 11 extending through the water of the multiple grout anchors 10 penetrates through the upper portion of the grout R when it sinks above the rock R in the vertical direction above the upper grooves 10.

In the sixth step (f), a part of the steel wire 11 passing through the through hole 21 of the anchor block 20 is connected to the side of the sea structure S (S6). At this time, a separate connecting body 50 such as a large chain or a cable as shown in the left side of FIG. 3 or FIG. 9 is provided so that one side of the connecting body 50 is fixed to the sea structure S, A method of collecting and fixing a part of the steel wire 11 at one point on the other side of the body 50 can be used. Or the ends of the upper portions of the steel wires 11 may be collected at one point and connected directly to the sea structure S as shown in the right side of FIG.

By providing the pulleys 22 as many as the number of the steel wires 11 on the anchor block 20, it is possible to collect a portion of the ends of the steel wires 11 extending to the water and connect them to the side of the sea structure S. So that the steel wires 11 are smoothly bent to the above-mentioned point.

The construction method described above is suitable for mooring the sea structure (S) at a shallow water depth.

Next, Fig. 8 is a process flow chart of the second embodiment of the construction method of the present invention, and will be described with reference to Fig. 4, Fig. 5, and Fig.

In the first step (g) of the second embodiment of the construction method of the present invention, an anchor block 120 having a hollow pipe and having a pipe pipe 122 in a vertical direction is manufactured on the land, The anchor block 120 is moved to a fixed position on the sea floor where the preceding excavated multi-grout block anchor is to be installed and placed in a floating state (S10). At this time, it is preferable to fix the anchor block 120 to other adjacent anchor or marine fixture using a cable C or the like so that the anchor block 120 does not move arbitrarily in the sea. The anchor block 120 disposed in a floating state at the fixed position is provided with a water supply port 121 for supplying seawater to the inside of the hollow, and the multi-grout anchor 110 is installed in a floating state It is also used as a work site where insertion of the rod 30 using the perforator and embedding of the steel wire 111 and formation of the fusing unit 112 by supplying grout are performed.

In the second step (h), on the anchor block 120, the rods 111 constituting the multi-grout anchor 110 to be constructed according to the present invention are loaded on the rock bed R Is inserted into the rock bed R of the seabed through a pipe tube 122 of the anchor block 120 by using a perforator (S20). The grout hose 40 for grout feeding is inserted into the rod 30 and the steel wire 111 constituting the multiple grout anchor 110 is accommodated. A perforator M placed on the anchor block 120 is used to insert the rod 30 into the rock R. [

In the third step (i), as the rod 30 is inserted into the rock R, a portion of the steel wire 111 is embedded together with the rock R in a state of being extended into the water (S30-1). A grout (for example, cement milk or mortar) is supplied through the grout hose 40 inserted in the rod 30 to form a spherical-shaped fixing portion 112 to complete the multiple grout anchor 110 (S30-2). When the grout is supplied through the grout hose 40, the pressure grouting method as described above can be applied.

In the fourth step (j), the rod 30 inserted in the rock R is taken out from the rock R (S40). At this time, the grout hose 40 fixedly inserted into the rod 30 is pulled out together with the rod 30, and the steel wire 111 is fixed to the rock R by the fixing portion 112 at the lower end thereof Lt; / RTI > The steps (h) to (j) are repeated to form a plurality of fixing units 112.

In the fifth step (k), water is supplied into the hollow anchor block 120 through a water supply port 121 provided in the anchor block 120 (S50). At this time, it is preferable to use seawater around the anchor block 120 as the water supply.

In step (l), which is the sixth step, the anchor block 120 is submerged on the rock R in the vertical direction above the multiple grout anchors 110 due to the self weight increasing as the water is supplied into the anchor block 120 (S60). At this time, since the steel wire 111 penetrates through the respective pipe tubes 122 provided in the anchor block 120, the anchor block 120 sinks along the steel wires 111. Also, before the anchor block 120 is submerged by its own weight, the cable (C) or the like fixed to the adjacent anchor or marine fixture is removed so that the anchor block 120 does not move arbitrarily in the sea.

In the seventh step (m), a part of the steel wire 111 extending through the pipe tube 122 of the anchor block 120 is connected to the side of the sea structure S (S70). At this time, a separate connecting body 50 such as a large chain or a cable as shown in the left side of FIG. 6 or FIG. 9 is provided so that one side of the connecting body 50 is fixed to the sea structure S, A method of collecting and fixing a part of the steel wire 111 at one point to the other side of the steel wire 50 can be used. Alternatively, as shown in the right side of FIG. 9, the ends of upper portions of the steel wires 111 may be collected at one point and directly connected to the sea structure S.

By providing the pulleys 123 as many as the number of the steel wires 111 on the anchor block 120, it is possible to collect a portion of the ends of the steel wires 111 extending to the water and connect them to the side of the sea structure S. So that the steel wires 111 are smoothly folded to the above-mentioned point.

The construction method described above is suitable for mooring the sea structure (S) at a deep water depth.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, This is possible.

10, 110: Multiple grout anchors 11, 111: Steel wire
12,112: Fusing unit 20,120: Anchor block
21: through hole 30: rod
40: grout hose 50: connecting body
22,123: pulley 121: water inlet
122: pipe tube C: cable
M: Perforator R: Rock bed
S: Offshore structure W: Workshop
W1: Support

Claims (8)

A grout hose for supplying grout is accommodated in a rod inserted into the rocket, and the rod is embedded in the rocket as it is excavated on the rock of the sea bed, while a part of the rod is embedded in the rocket and connected to the sea structure A plurality of grouting anchors formed by a plurality of steel wires and a fusing portion formed by a grout supplied from the grout hose at a lower end of a steel wire embedded in the rock;
And a plurality of pipe tubes having a water inlet for supplying water to the inside and a rod and a steel wire through which the rod and the steel wire can pass, Wherein the grout is used as a work site where embedding of the steel wire and formation of a fusing part by the grout feeding is performed and when it sinks on the rock, water is supplied into the inside through the water supply port, A preceding excavated multiple grouting block anchor comprising an anchor block.
The method according to claim 1,
Wherein the anchoring block further comprises a connector connected to the sea structure at one end and to a portion of the steel wire extending through the pipe at the other end of the anchor block in the anchor block.
delete The method according to claim 1,
Wherein the anchor block is provided with pulleys for collecting the ends of a portion extending in the water of the steel wires at one point and connecting the steel wires to the sea structure, Pre-excavated multi-grouting block anchors.
(a) constructing a worksite at a fixed location on the sea where a preceding excavated multi-grove block anchor will be installed;
(b) inserting the rod into a rock bed of a submarine using a perforator in a state where a grout hose for grout supply accommodates a steel wire on a rod inserted therein;
(c) the grout is supplied through the grout hose to form a fusing part at the lower end of the steel wire after the steel wire is inserted into the rock in a state where the steel wire extends partly into the water as the rod is inserted, thereby completing the multiple grout anchor ;
(d) withdrawing the rod into which the grout hose is inserted;
(e) fabricating an anchor block having a plurality of through holes on the ground and sinking a portion of the steel wire extending through the water through the through-hole while vertically above the multiple grout anchor on the rock;
(f) connecting a part of the steel wire penetrating the through hole of the anchor block to the side of the marine structure.
6. The method of claim 5,
In the step (f), a connecting body having one side fixed to the side of the sea structure may be provided and a part of the steel wire may be collected and fixed to the other side of the connecting body so that a part of the steel wire is connected to the sea structure Wherein the anchors are installed on the anchors of the preceding excavation multi-grout block anchors.
(g) disposing an anchor block having a hollow pipe inside and a pipe pipe at an upper position and a lower pipe in a floated state at a fixed position of the sea where the pre-excavated multi-grout block anchor is to be installed;
(h) inserting the rod into the rock bed of the seabed through the pipe through the pipe using a perforator in a state where the grout hose for grout supply is received in the rod inserted in the anchor block on the anchor block;
(i) the grout is supplied through the grout hose to form a fusing part at the lower end of the steel wire after the steel wire is inserted into the rock in a state where the steel wire extends partly into the water as the rod is inserted, thereby completing the multiple grout anchor ;
(j) withdrawing the rod into which the grout hose is inserted;
(k) watering the inside of the anchor block;
so that the anchor block sinks on the rock in the vertical direction above the multiple grout anchors along the steel wire by the weight of the anchor block supplied in the inside of the multi-grouting anchor;
(m) connecting a part of the steel wire penetrating the pipe pipe of the anchor block to the side of the marine structure.
8. The method of claim 7,
In the step (m), a connecting body having one side fixed to the sea structure may be provided, and a part of the steel wire may be collected and fixed to the other side of the connecting body so that a part of the steel wire is connected to the sea structure Wherein the anchors are installed on the anchors of the preceding excavation multi-grout block anchors.

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