KR102185234B1 - Pre-piling template using spudcan and installation method of offshore structure using thereof - Google Patents

Abstract

The present invention relates to a pre-filing template using a spudcan base and a method for installing offshore structures using the same. To this end, a pile guide for guiding the direction of the piles constructed to penetrate into the seabed ground; Spudcan foundation for intruding into the submarine ground and generating a bearing force; A connection member configured to be coupled to one end of the spudcan base and configured parallel to the pile guide; An elevating module configured to receive the connecting member and driving the connecting member to slide in a direction parallel to the pile guide; And a frame for interconnecting and fixing the pile guide and the lifting module. It may be provided.

Description

Pre-piling template using spudcan and installation method of offshore structure using thereof

The present invention relates to a pre-filing template using a spudcan base and a method for installing offshore structures using the same.

The supporting structures of offshore wind power structures, oil or gas production structures, offshore science base structures, and port structures can be divided into fixed supporting structures and floating supporting structures. The floating support structure is not fixed to the ground but is floating on seawater. Various concepts have been proposed and are in the demonstration stage. In particular, the 2.3MW spa-type floating wind turbine installed on the west coast of Norway at a depth of 220m is the first floating offshore wind power generation structure in operation.

The fixed support structure refers to a support structure that is fixed to the seabed and supports the marine structure. For the fixed support structure, basic structures such as jacket support structure, monopile, tripod, longitudinal type, etc. are applied. The jacketed support structure has been operated for the longest time as a fixed oil and gas mining facility among offshore wind power support structures, and is relatively often installed at a depth between 20m and 50m compared to other support structures. In addition, the jacketed support structure is the most preferred support structure as a support structure for a large wind power generator of 5MW or more or a large offshore wind generator with a heavy tower weight. 1 is an exemplary view showing an exemplary structure of a jacket-type support structure. As shown in FIG. 1, the jacket-type support structure is generally composed of four legs and a plurality of braces connecting the legs, and these legs are supported on the ground by piles. It can be configured to be.

At this time, the jacket support structure is classified into post-piling and pre-piling according to the timing of the pile construction, and post-piling is a pile through driving and excavation by inserting the pile into the leg of the jacket after mounting the jacket. It means a method of constructing, and the first step of mounting the jacket on the sea floor using a marine crane, etc., the second step of driving the jacket pile into the inside of the leg of the jacket in a state of being mounted with a marine crane and fixing it to the ground, The third step of drilling through the jacket pile through the jacket pile using the RCD method, etc. to the rock mass, inserting a pin pile and performing grouting to fix the pin pile, jacket pile, leg, and ground to each other. It can be constructed through the fourth step.

Pre-filing refers to a method in which piles are first constructed before the construction of the jacket support structure, and then the jacket is mounted and combined.The first step of performing preparation work such as leveling the sea floor, placing a template on the sea floor It can be constructed through the second step of constructing the pile as a guide, and the third step of combining the pile and the jacket using grouting after mounting the jacket on the completed pile. 2 is a photograph showing an example of a template used in the pre-filing method. As shown in Figure 2, the template is a configuration for performing the guide of the pile construction in the pre-filing method. In general, the pre-filing method has a high overall construction speed and excellent economical efficiency compared to the post-filing method.

In order to construct the jacket support structure by applying this pre-pile method, the template must be mounted on the sea floor as a guide for controlling the position and verticality of the piles.

Korean Patent Registration 10-1691968, Apparatus and method for determining the location of spud cans for offshore structures, Samsung Heavy Industries Co., Ltd. Republic of Korea Patent Publication 10-2016-0035816, Jackup League Spud Can and ship or offshore structure including the same, Daewoo Shipbuilding & Marine Engineering Co., Ltd.

However, in this pre-filing template, it is difficult to adjust the horizontal or height of the template in response to the curvature or curvature of the sea floor because the bottom of the sleeve, which is a guide to the pile, is mounted on the sea floor and supports the entire structure. Therefore, there was a problem that the bearing capacity was relatively insufficient.

In addition, the support part may be settled by the self-weight and external force of the template, and since this support part settlement is fluid due to the ground conditions and external force conditions of the sea floor, there was a problem that it was difficult to predict or prepare in advance, and the sleeve itself was supported by the ground. There was a possibility of being damaged.

In addition, when amber stones exist on the sea floor or are composed of a gravel layer or a rock layer, there is a problem that the horizontal adjustment of the template becomes very difficult.

Accordingly, an object of the present invention is to provide a pre-filing template using a spudcan base and a method for installing offshore structures using the same in order to solve the above problem.

Hereinafter, specific means for achieving the object of the present invention will be described.

An object of the present invention is a pile guide for guiding the direction of the pile to be built to penetrate into the seabed ground; A spudcan foundation for generating a supporting force by being penetrated into the submarine ground; A connection member configured to be coupled to the spud can base at one end and configured in parallel with the pile guide; And a frame connecting the pile guide and the connecting member to each other, wherein the spud can foundation penetrates into the submarine ground to support the frame, and the pile during pre-piling construction of the pile for installation of an offshore structure It can be achieved by providing a pre-filing template using a spudcan base, characterized in that to guide the construction direction of.

Another object of the present invention is a pile guide for guiding the direction of the pile to be constructed so as to penetrate into the sea floor; A spudcan foundation for generating a supporting force by intruding into the subsea ground; A connection member configured to be coupled to the spud can base at one end and configured in parallel with the pile guide; An elevating module configured to receive the connecting member and driving the connecting member to slide in a direction parallel to the pile guide; And a frame for mutually connecting and fixing the pile guide and the lifting module, wherein when the spud-can base is in contact with the submarine ground, the connecting member slides downward so that the spud-can foundation penetrates the submarine ground. After controlling the lifting module, comprising a control means for controlling the upward or downward driving of the connecting member of the lifting module so that the horizontal or height of the frame is adjusted, pre-filing using a spudcan base This can be achieved by providing a template.

In addition, the frame has a beam structure of a polygonal shape, further comprises an outer beam constituting the corner of the polygonal shape and an inner beam connecting the vertex and the center point of the polygonal shape, and the elevating module, the connection member, and the spur The scan base may be configured on one side of the inner beam.

In addition, an upper end lid configured to seal an upper end of the pile guide and open and close the upper end of the pile guide by the control means; A lower lid configured to seal the lower end of the pile guide and open and close the lower end of the pile guide by the control means; An inlet through the upper lead or the lower lead so that seawater flows into the inner space of the pile guide; And an opening/closing member configured at the inlet port so that the inlet port configured in the upper lead or the lower lead can be opened and closed by the control means, and when the upper lead and the lower lead are closed, the pile guide of the pile guide Buoyancy can be generated by the internal space.

In addition, a spudcan sensor module configured on the basis of the spudcan to generate spudcan tilt information, which is tilt information based on the spudcan; And a frame sensor module configured in the frame to generate frame tilt information, which is tilt information of the frame, wherein the control means receives the spudcan tilt information and the frame tilt information, and the spudcan tilt information It is possible to determine whether or not the spudcan-based punch through occurs based on a time-series change of the frame slope information.

Further, a grout outlet configured to penetrate the spud can base vertically, and is maintained in a closed state and opened when the spud can base is drawn out; It is configured in the form of a bag configured on the upper part of the spud can base to receive grout therein, and is connected to the grout outlet so that the grout flows downwards of the spud can base with the opening of the grout outlet. It further includes, and when the spud can base is drawn, the grout outlet is opened so that the grout accommodated in the grout bag may be discharged below the spud can base.

Another object of the present invention is a pile guide for guiding the direction of the pile to be constructed so as to penetrate into the sea floor; A spudcan foundation for generating a supporting force by being penetrated into the submarine ground; A connection member configured to be coupled to the spud can base at one end and configured in parallel with the pile guide; And a frame connecting the pile guide and the connecting member to each other; a pre-filing template descending step of lowering the pre-filing template including the subsea ground; A spud-can foundation penetration step of infiltrating the spud-can foundation into the submarine ground; A pile construction step of constructing the pile on the subsea ground by passing through the pile guide using a pile penetration device after the spudcan foundation of the pre-filing template is penetrated into the subsea ground; A spudcan foundation drawing step of drawing the spudcan foundation after the construction of the pile is completed; And a pre-filing template removing step of lifting and removing the pre-filing template after the drawing of the spud can foundation is completed; including, and installing a marine structure based on the piles pre-piled after the pre-filing template removing step It can be achieved by providing a method for installing offshore structures using a pre-filing template.

Another object of the present invention is a pile guide for guiding the direction of the pile to be constructed so as to penetrate into the sea floor; A spudcan foundation for generating a supporting force by being penetrated into the submarine ground; A connection member configured to be coupled to the spud can base at one end and configured in parallel with the pile guide; An elevating module configured to receive the connecting member and driving the connecting member to slide in a direction parallel to the pile guide; And a frame for connecting and fixing the pile guide and the lifting module to each other; a pre-filing template lowering step of lowering the pre-filing template including the subsea ground; A spud-can foundation penetration step of driving the elevating module after the spud-can foundation is in contact with the submarine ground to penetrate the spud-can foundation into the submarine ground; An adjustment step of adjusting the horizontal or height of the pre-filing template by controlling the elevating module according to the horizontal inclination or height of the pre-filing template after the spud can base is intrusively installed in the submarine ground; A pile construction step of constructing the pile on the subsea ground by passing through the pile guide using a pile penetration device after the horizontal or height of the pre-piling template is adjusted; A spudcan foundation drawing step of drawing the spudcan foundation after the construction of the pile is completed; And a pre-filing template removal step of lifting and removing the pre-filing template after the drawing of the spudcan foundation is completed; .

As described above, the present invention has the following effects.

First, according to an embodiment of the present invention, the template is firmly supported on the seabed by the spud can, and the template is easily pulled out after the template is used.

Second, according to an embodiment of the present invention, the effect of facilitating horizontal and height adjustment to cope with the curvature of the submarine ground and additional subsidence occurring after the initial settlement occurs.

The following drawings attached to the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in such drawings. And should not be interpreted.
1 is an exemplary view showing an exemplary structure of a jacket-type support structure,
2 is a photograph showing an example of a template used in the pre-filing method,
3 is a plan view showing a pre-filing template using a spudcan base according to an embodiment of the present invention;
4 is a front view showing a pre-filing template using a spudcan base according to an embodiment of the present invention;
5 is a flowchart showing a method of installing an offshore structure according to an embodiment of the present invention;
6 is a schematic diagram showing a pre-filing template descending step according to an embodiment of the present invention;
7 is a schematic diagram showing a spud can base 30 intrusion step (S12) according to an embodiment of the present invention,
Figure 8 is a schematic diagram showing a pile construction step (S13) according to an embodiment of the present invention,
9 is a schematic diagram showing a spud can basic drawing step (S14) according to an embodiment of the present invention,
10 is a schematic diagram showing a pre-filing template removing step (S15) according to an embodiment of the present invention;
11 is a flow chart showing the step S11 in the inclined submarine ground according to an embodiment of the present invention,
12 is a schematic diagram showing a plan view of a pre-filing template according to a first modified example of the present invention;
13 is a schematic diagram showing a plane of a pre-filing template according to a second modified example of the present invention;
14 is a schematic diagram showing the transport of a pre-filing template 1 according to a third modified example of the present invention;
15 is a schematic diagram showing a specific configuration of a pre-filing template 1 according to a third modified example of the present invention;
16 is a schematic diagram showing a shear force generated when a pile intrusion is constructed according to an embodiment of the present invention and a change in inclination of the pre-filing template 1;
17 is a schematic diagram showing a spud can base 30 according to a seventh modified example of the present invention.

Hereinafter, exemplary embodiments in which the present invention can be easily implemented by those of ordinary skill in the art will be described in detail with reference to the accompanying drawings. However, when 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.

In addition, the same reference numerals are used for parts having similar functions and functions throughout the drawings. Throughout the specification, when a specific part is said to be connected to another part, this includes not only the case that it is directly connected, but also the case that it is indirectly connected with another element interposed therebetween. In addition, the inclusion of a specific component does not exclude other components unless specifically stated to the contrary, but means that other components may be further included.

Pre-filing template using spudcan basis

Regarding the pre-filing template using the spudcan base according to an embodiment of the present invention, FIG. 3 is a plan view showing the pre-filing template using the spudcan base according to an embodiment of the present invention, and FIG. A front view showing a pre-filing template using a spudcan base according to an embodiment. As shown in Figures 3 and 4, the pre-filing template 1 using a spud can base according to an embodiment of the present invention includes a frame 10, a pile guide 20, and a spud can base 30 can do.

The frame 10 has a polygonal shape such as a square or a triangle in a plane, and each surface may be composed of a frame member having two or more parallel beam structures reinforced with a plurality of cross beam members. The specific configuration of the frame 10 has been described as at least two parallel beam structures reinforced with a cross beam member for convenience of explanation, and the range of the frame member form in the present invention is the structure of the frame member in FIGS. Is not limited to Each vertex of the frame 10 having a polygonal shape according to an embodiment of the present invention may be provided with a pile guide 20 serving as a piling guide. This polygonal frame 10 may be composed of an outer beam 11 and an inner beam 12, as shown in FIG. 3, and the outer beam 11 is a beam member constituting the outer edge of the polygonal shape. It may mean, and the inner beam 12 may mean a beam member constituting the inner reinforcing frame connecting the vertices of a polygonal shape. As shown in FIG. 4, the outer beam 11 or the inner beam 12 may have a structure of at least two parallel beams 101 reinforced with a cross beam member 100.

In addition, a lifting fixing part 13 for quoting a template may be configured at one side of the corner of the frame 10 according to an embodiment of the present invention. The lowering and lifting of the template are performed by the lifting fixing part 13.

In addition, at one side of the frame 10 according to an embodiment of the present invention, a sensor module 40 for measuring the horizontal, angular velocity, acceleration, height or depth of the template may be further included. The sensor module 40 according to an embodiment of the present invention includes an acceleration sensor and a gyro sensor to generate horizontal information, and includes a geomagnetic sensor, a depth measurement sensor, a sound wave distance sensor, etc. You can generate height information. The horizontal information, depth information, or height information generated by the sensor module 40 may be transmitted to a control unit on the sea or on the ground by a communication module connected to the sensor module 40, or of the elevating module 33 of the spudcan base 30. Can be used for control. Also, the sensor module 40 may include at least one camera module to generate underwater visual information. Such underwater time information may also be transmitted to a control unit on the sea or on the ground by the communication module, or may be used for control of the lifting module 33 of the spudcan base 30.

As shown in Figs. 3 and 4, the pile guide 20 may be composed of a hollow cylindrical member whose top and bottom are open, and the pile is inserted after the pre-filing template 1 is installed to guide the pile penetration direction to be. The pile introduction part located above the pile guide 20 may include a funnel-shaped sleeve 21 having a diameter wider than that of the pile guide 20 in order to increase the possibility of receiving the pile.

Spudcan foundation 30 is a foundation configuration in which the end in contact with the seabed is formed in an inverted cone shape to penetrate the seabed, and according to an embodiment of the present invention, at least one or more, preferably Three to four spudcan bases 30 may be configured. The spudcan foundation 30 may be configured to protrude lower than the lower end of the frame 10 and the pile guide 20 so as to contact the sea floor, and to adjust the relative distance between the seabed ground and the pre-filing template 1 . In addition, the spud-can base 30 may be configured on the inside of the frame 10, or the spud-can base 30 may be configured on the outside of the frame 10, as shown in FIGS. 3 and 4 However, differences in effect may occur. When the spudcan base 30 is configured on the inner beam 12 of the frame 10, even if a punch through of the specific spudcan base 30 occurs, the inclination of the prefiling template 1 is excessive. There is an effect that does not change significantly. In addition, when the spud can foundation 30 is configured on the outer beam 11 of the frame 10, it is configured to support at least two spud can foundations 30 on one pile guide 20, The effect of improving the horizontal support force of the pile guide 20 is generated.

In order to drive the spudcan base 30, a motor, an electric wire, a battery, a hydraulic pump, a mechanical device such as a hose, a measuring device, and a control device may be provided.

Spud can base 30 according to an embodiment of the present invention may be configured to be coupled through a connection member 32 and a coupling member 31, and the connection member 32 is configured on one side of the frame 10 It is coupled to the module 33 and may be configured to slide or drive in the vertical direction by the lifting module 33. In this case, the connection member 32 according to an embodiment of the present invention may be configured as a beam member having a lattice structure including a cross beam reinforcing member or a member having a single beam structure. In FIGS. 3 and 4, the connecting member 32 is expressed as a member having a single beam structure, but the scope of the present invention is not limited thereto. The lifting module 33 may be configured as a structure of hydraulic cylinders having moving and stationary pins, or may be configured as a structure using a pinion gear.

In addition, with respect to the connection relationship between the spudcan base 30 and the frame 10 according to an embodiment of the present invention, the spudcan base 30 is a plane of the frame 10 at one side of each inner beam 12 It can be configured to face a vertical direction. Specifically, it may be configured on one side of the inner beam 12 between the vertex of the frame 10 and the center of the frame 10. According to this, the effect of being able to support the frame 10 using the minimum number of spudcan bases 30 is generated.

According to this, the template is firmly supported on the seabed by the spud can, and the template is easily pulled out after the template is used. In particular, compared to the case of mounting on the surface of the sea floor in the form of a mat foundation, since the spudcan foundation 30 penetrates into the submarine ground, the bearing capacity increases, so that the pre-filing template 1 resists external force and improves the guide performance during pile construction The effect occurs.

In addition, the importance of the planarization work to be carried out before descending of the template is lowered, and the horizontal and height adjustment to cope with the bend of the seabed and the additional settlement occurring after the initial settling is generated. That is, it is possible to adjust the height and the amount of protrusion of each spudcan foundation 30 and the load acting on the irregular and inclined seabed condition. Accordingly, it is possible to minimize preliminary work such as leveling work on the sea floor, facilitate pile construction, and improve construction quality. In addition, an effect that can be omitted or minimized by replacing a separate operation member for adjusting the horizontal and height of the pre-filing template 1 is generated.

In addition, compared to the case where the pile guide 20 itself is supported on the ground, according to an embodiment of the present invention, the roles of the pile guide 20 and the spudcan foundation 30 are separated, so that the purpose of supporting and drawing It can be simplified by optimization, and the effect of improving the ease of support and drawing occurs. When the pile guide 20 itself is supported on the ground as in the conventional method, the apparatus is complicated and the pile guide 20 may be dent in the ground, so that a problem may occur during pile construction.

In addition, since the length of the connection member 32 connecting the spudcan base 30 and the frame 10 can be set relatively freely, the effect of increasing the vertical operating range of the spudcan base 30 is generated. . Accordingly, it is possible to perform an optimal function using the spudcan foundation 30 according to various ground conditions and working conditions. In addition, after the pile construction work is completed, the spudcan foundation 30 is pulled out, the pre-filing template 1 is pulled out and removed, and the effect of immediately reusing at another location occurs.

Offshore structure installation method using pre-filing template

Regarding the method of installing an offshore structure using a pre-filing template, FIG. 5 is a flowchart illustrating a method of installing an offshore structure according to an embodiment of the present invention. As shown in Figure 5, the offshore structure installation method according to an embodiment of the present invention, the pre-filing template descending step (S10), the spudcan foundation penetration step (S12), horizontal and height adjustment step (S13), pile It may include a construction step (S14), a spudcan base drawing step (S15), and a pre-filing template removal step (S16).

The pre-filing template descending step (S10) is a step of fixing the lifting wire to the lifting fixing part 13 and lowering the pre-filing template 1 to the seabed by using an offshore crane or the like. 6 is a schematic diagram showing a step of descending a pre-filing template according to an embodiment of the present invention. As shown in FIG. 6, S10 may be configured to fix the lifting wire to the lifting fixing part 13 and lower the pre-filing template 1 to the submarine ground using a marine crane or the like.

The spud-can foundation penetration step (S11) is a step of intruding the spud-can foundation 30 into the submarine ground using the lifting module 33 after the spud-can foundation 30 comes into contact with the submarine ground. 7 is a schematic diagram showing a spud can base 30 intrusion step (S12) according to an embodiment of the present invention. As shown in Figure 7, S11 is to install the spud can base 30 intrusively into the submarine ground using the lifting module 33. At this time, as shown in FIG. 7, a through hole by the spud can base 30 is formed in the submarine ground. The through hole is formed in different degrees of back flow, shape, depth, and diameter according to the properties of the submarine ground.

The horizontal and height adjustment step (S12) is elevating according to the horizontal slope and height of the pre-filing template sensed by the sensor module 40 for optimizing the construction of the pile after the spud can foundation 30 is penetrated and installed in the seabed This is a step of controlling the module 33 to adjust the level and height of the pre-filing template 1.

The pile construction step (S13) is a step of penetrating the pile guide 20 using a pile penetration device such as a hammer after the horizontal and height of the pre-filing template 1 are adjusted to construct a pile on the seabed. Figure 8 is a schematic diagram showing a pile construction step (S13) according to an embodiment of the present invention. As shown in FIG. 8, the pile is constructed on the seabed by passing through the pile guide 20 using a pile penetration device such as a hammer.

Spudcan foundation drawing step (S14) is a step of drawing the spudcan foundation 30 after the pile construction is completed. 9 is a schematic diagram showing a spud can basic drawing step (S14) according to an embodiment of the present invention. As shown in FIG. 9, it is a step of controlling the lifting module 33 to pull out the spudcan base 30 from the submarine ground.

The step of removing the pre-filing template (S15) is a step of lifting and removing the pre-filing template using the lifting wire and the lifting fixing part 13 after the drawing of the spudcan base is completed. 10 is a schematic diagram showing a pre-filing template removal step (S15) according to an embodiment of the present invention. As shown in FIG. 10, the pre-filing template is lifted and removed using the lifting wire and the lifting fixing part 13, and only piles elaborately constructed by the pre-filing template exist on the seabed. After step S15, a jacket foundation is installed on the pre-pile pile.

In the sloping seabed, the step of S11 can proceed as follows. 11 is a flow chart showing step S11 in the inclined seabed ground according to an embodiment of the present invention. As shown in FIG. 11, when the pre-filing template 1 descends in step S10 and the spudcan base 30 at a specific location first lands on the submarine ground, step S11 from the spudcan base 30 landed first Intrusion into the seabed can be carried out by performing Subsequently, when the remaining spudcan foundation 30 is landed on the submarine ground, the subordinated foundations also successively perform step S11 to intrude into the submarine ground.

Modification 1

In relation to the first modified example of the present invention, the frame 10 of the pre-filing template 1 according to the first modified example of the present invention includes a spudcan base 30, a connecting member 32, and an elevating module 33. In order to stably support the inner beam 12 may be designed as two or more parallel beams. 12 is a schematic diagram showing a plan view of a pre-filing template according to a first modified example of the present invention. As shown in FIG. 12, the inner beam 12 may be composed of two or more parallel beams, and a cross beam may be further included to reinforce the inner beam 12.

2nd modified example

In connection with the second modified example of the present invention, the spud can base 30, the connecting member 32 and the lifting module 33 of the pre-filing template 1 according to the second modified example of the present invention are frame 10 It can be configured on the outer beam 11 of. 13 is a schematic diagram showing a plan view of a pre-filing template according to a second modified example of the present invention. As shown in FIG. 13, the spudcan base 30, the connecting member 32, and the lifting module 33 may be configured on the outer beam 11 of the frame 10. According to this, since the two spud-can foundations 30 adjacent to one pile guide 20 impart a support force, an effect of improving the horizontal support force during pile construction occurs.

Third modified example

In connection with the third modified example of the present invention, the pre-filing template 1 according to the third modified example of the present invention is a fully automatic upper lid open/closed by a control unit at the upper and lower openings of the pile guide 20. ) And the bottom fully automatic opening and closing lead can be configured. In particular, in the lower fully automatic opening/closing lead according to the third modified example of the present invention, an inlet is configured to be opened and closed by a control unit so that seawater is introduced into the pile guide 20 while the fully automatic opening and closing lead is closed. Can be configured. According to a third modified example of the present invention, it is possible to transport the pre-filing template 1 to the lifting ship by using the buoyancy applied to the pile guide 20 in the closed state of the fully automatic opening and closing lead, and the pile By adjusting the buoyancy of the guide 20, the horizontal and height of the pre-filing template 1 can be adjusted, so that the role of the offshore crane is reduced or the offshore crane is not required.

Regarding the pile construction using the pre-filing template 1 according to the third modified example, FIG. 14 is a schematic diagram showing the transport of the pre-filing template 1 according to the third modified example of the present invention. As shown in FIG. 14, the pre-filing template 1 according to the third modified example of the present invention can be transported to a lifting vessel by the buoyancy of the pile guide 20.

15 is a schematic diagram showing a specific configuration of a pre-filing template 1 according to a third modified example of the present invention. As shown in FIG. 15, the pre-filing template 1 according to the third modified example of the present invention has an upper lead 22 at the top of the pile guide 20 and a hinge 24 at one side of the sleeve 21. Through it may be configured to be connected to be rotatable in a specific direction. In addition, the lower lead 23 at the bottom of the pile guide 20 may be connected to be rotatable in a specific direction through the hinge 24. In particular, the upper lead 22 or the lower lead 23 may be configured with an inlet 25 through which seawater is introduced, and the inlet 25 may be opened and closed by the opening and closing member 26. When the inlet 25 is closed by the opening/closing member 26, seawater does not flow into the inside of the pile guide 20, and when the inlet 25 is opened by the opening/closing member 26, the seawater of the pile guide 20 It is introduced to the inside and the buoyancy by the pile guide 20 is reduced. The pre-filing template 1 according to the third modified example of the present invention can be adjusted horizontally and in height by controlling the opening and closing member 26 of the control unit after being transported to the pile construction position. In particular, it is possible to adjust the buoyancy of the pile guide 20 so that the lower end of the pile guide 20 does not touch the submarine ground.

When the opening/closing member 26 is opened and seawater flows into the inlet 25, the buoyancy of the pile guide 20 is reduced, so that the pre-filing template 1 is lowered, and the level of the pre-filing template 1 is adjusted. For this purpose, it may be determined whether the opening/closing member 26 of each pile guide 20 is opened or closed. When a specific depth is measured by the sensor module 40, the opening/closing member 26 may be closed so that seawater does not flow into the inlet 25. After that, under the control of the lifting module 33, the spudcan foundation 30 descends and penetrates into the submarine ground, and each hinge is opened to open both the upper lead 22 and the lower lead 23 of each pile guide 20. After controlling (24), the pile construction is carried out. After the pile construction is completed, the spudcan foundation 30 rises under the control of the lifting module 33 and is separated from the submarine ground, and both the upper lead 22 and the lower lead 23 of each pile guide 20 are After controlling each hinge 24 to be closed, seawater existing in the inner space of each pile guide 20 is sucked to form buoyancy. The pre-filing template 1 after the pile construction may be configured to be removed by the pile guide 20 in which the buoyancy is formed.

Modification 4

In connection with the fourth modified example of the present invention, a spudcan sensor module, which is a sensor module such as an acceleration sensor and a gyro sensor, that communicates with the control unit may be further configured in the spudcan base 30 according to the fourth modified example of the present invention. In addition, spudcan slope information, which is slope information of the spudcan base 30, may be generated by the spudcan sensor module.

According to the spudcan sensor module configured on the spudcan base 30 according to the fourth modified example of the present invention, a control unit configured on the sea, onboard, on the ground or the frame 10 is provided in the spudcan tilt information and the sensor module 40. Eccentricity information or bending information of the connecting member 32 can be measured using the generated inclination information of the frame 10, and the lower the degree of eccentricity or bending of the connecting member 32, the lower the supporting force of the submarine ground. It is possible to further modify the design depth during pile construction by judging. According to this, by the construction of the spudcan foundation 30, precise soil information of the construction location of the piles is generated, so that more effective pile construction can be performed.

5th modified example

In connection with the fifth modified example of the present invention, a spudcan sensor module, which is a sensor module such as an acceleration sensor and a gyro sensor, that communicates with the control unit may be further configured in the spudcan base 30 according to the fifth modified example of the present invention. In addition, spudcan slope information, which is slope information of the spudcan base 30, may be generated by the spudcan sensor module.

According to the spudcan sensor module configured on the spudcan base 30 according to the fifth modified example of the present invention, a control unit configured on the sea, onboard, on the ground or the frame 10 is provided in the spudcan tilt information and the sensor module 40. It may be configured to determine whether or not a punch through occurs in a specific spudcan basis 30 based on a time-series change in slope information of the generated frame 10. When the stiffness of the submarine ground changes rapidly in the process of intrusion of the spud can foundation 30, it is referred to as a punch through that the spud can foundation 30 rapidly descends to a point having penetration resistance. When a punch-through occurs in one of the plurality of spudcan bases 30 configured in the pre-filing template 1, a problem arises that the horizontal of the pre-filing template 1 changes rapidly. Therefore, the control unit according to the fifth modified example of the present invention can determine that a punch-through has occurred in the specific spudcan base 30 in a section in which the spudcan inclination information and the inclination information of the frame 10 change significantly in time series. have.

The control unit according to the fifth modified example of the present invention, when the control unit determines that the punch-through has occurred in the specific spud can base 30, the spud-can base 30 in which the punch through has been generated is a lifting module 33 so as to descend. It is possible to control the elevating module 33 to control and the other spudcan base 30 to rise. The control unit lifts and lowers the module 33 so that the spud-can base 30 in which the punch through is generated is lowered until the inclination information of the frame 10 measured by the sensor module 40 of the frame 10 is measured as maintaining the horizontal level. ) And the other spudcan base 30 can control the lifting module 33 to rise.

Modification 6

In relation to the sixth modified example of the present invention, after the penetration of the spudcan foundation 30 is completed and the construction of the pre-filing template 1 is completed, the pile construction is performed and the pile is constructed on the specific pile guide 20 , A shear force is generated in the spud-can foundation 30 by the piles being penetrated into the submarine ground, so that displacement or deformation may occur in the spud-can foundation 30. 16 is a schematic diagram showing a change in the inclination of the pre-filing template 1 and the shear force generated when the pile penetration is constructed according to an embodiment of the present invention. As shown in Fig. 16, the displacement or deformation of the spudcan foundation 30 due to pile penetration causes a change in the slope of the pre-filing template 1.

According to the sixth modified example of the present invention, the sensor module 40 measures the change in inclination of the pre-filing template 1 when the pile is penetrated, and when a change in inclination above a certain level is measured, the control unit lifts and lowers each pile guide 20. By controlling the module 33, the intrusion side spud can foundation 30, which is the spud can foundation 30 close to the pile guide 20 through which the pile is penetrated, is fixed in height, and the remaining spud can foundation 30 is lowered to pre-filing. After adjusting the level of the template 1, when the level of the pre-filing template 1 is aligned, it may be configured to perform construction of another pile. According to the sixth modified example of the present invention, since the intrusion side spudcan foundation 30 is fixed in height, it is possible to adjust the horizontal level of the pre-filing template 1 without causing displacement or change in bearing force to the piles inserted into the engine. There is.

Modification 7

With respect to the seventh modification of the present invention, between the pile and the pile in which the spud can foundation 30 was penetrated after the drawing of the spud can foundation 30 in the spud can foundation drawing step (S14) according to an embodiment of the present invention As the support force is lost in the space of, a shear force may be generated on the piles piled in the inner direction of the pre-piling template 1, or a problem may occur that the ground supporting the piles is settled.

The spud can base 30 according to the seventh modification of the present invention may further include a grout outlet and a grout bag. 17 is a schematic diagram showing a spud can base 30 according to a seventh modified example of the present invention. As shown in FIG. 17, a grout outlet 34 and a grout bag 35 may be further configured in the spud can base 30 according to the seventh modification of the present invention. The grout outlet 34 is a through hole configured to penetrate the spud can base 30 up and down, a method configured to be controlled by a control unit, and a method configured to be opened and closed by pressure acting on the grout bag 35 Or it may be configured in a manner configured to open and close together with the drawing of the connecting member 32 of the lifting module 33. The grout bag 35 is configured on the upper part of the spud can base 30 and can be connected to the grout outlet 34, and the grout is configured to flow below the spud can base 30 with the opening of the grout outlet 34 Can be. As shown in FIG. 17, when the spud can base 30 is pulled out, the grout outlet 34 is opened, and the grout provided inside the grout bag 35 passes through the grout outlet 34 to the spud can base ( It will flow down to 30). When the grout flows below the spud can base 30, the through hole formed by the penetration of the spud can base 30 is filled by the grout, and the effect of supporting the through hole is generated.

According to the spud can foundation 30 according to the seventh modified example of the present invention, when the penetration of the pile is completed and the spud can foundation 30 is drawn in the spud can foundation drawing step (S14), the spud can foundation 30 ) Rises, the grout outlet 34 is opened, and the grout is discharged below the spud can base 30. The penetration hole formed by the penetration of the spudcan foundation 30 is supported by the outflow grout and the settlement is prevented. After the submarine ground is stabilized by grout, the pre-piling template 1 is lifted and removed, and the offshore structure is constructed on the pre-piled piles.

In the driving of the spud can base 30 according to the seventh modification of the present invention, in particular, when the grout outlet 34 is driven in a manner configured to open and close by the pressure acting on the grout bag 35, the lifting module ( 33) by the vertical upward pressure acting on the upper surface of the spud-can base 30 and the penetration of the spud-can base 30 to the upper surface of the spud-can base 30. It can be configured to act on the grout outlet 34 through the grout bag 35 by the vertically downward self-weight pressure acting on the upper surface of the spudcan foundation 30 by the accumulated weight of the back flow of the submarine ground. The grout outlet 34 may be opened by the sum of the rising pressure of the decan base 30 and the backflow self-weight pressure. According to this, there is an effect that grouting of the through hole generated by penetration of the spud can base 30 is possible without any other mechanical device or control device.

Modification 8

In connection with the eighth modified example of the present invention, the pre-filing template 1 using the spud can base according to the eighth modified example of the present invention is provided with a frame only with the connecting member 32 and the spud can base 30 without a lifting module. 10) can be supported. In this case, the connecting member 32 may be fixed to the inner beam or the outer beam of the frame 10, and the spudcan base 30 is formed by the weight of the pre-filing template as the pre-filing template 1 is lowered. It can be configured to penetrate into the submarine ground and have a bearing capacity.

In the case of the eighth modified example of the present invention, the pile guide 20 may be configured to rotate in a plurality of angles and directions to adjust the construction direction or angle of the pile. According to the eighth modified example of the present invention, the beams of the frame 10 connected to the pile guide 20 for rotation of the pile guide 20 may be respectively connected by universal joints, and the beam of the frame 10 is at least 2 It may be composed of more than one sliding beam, and the length may be adjusted by sliding the beam. Accordingly, according to the eighth modified example of the present invention, the angle and direction of the pile guide 20 positioned at the vertex of the frame 10 may be adjusted through length adjustment of each beam of the frame 10.

As described above, those skilled in the art to which the present invention pertains will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, the above-described embodiments are illustrative in all respects and should be understood as non-limiting. The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention.

1: Prefiling template
10: frame
11: outer beam
12: inner beam
20: pile guide
21: sleeve
22: top lead
23: bottom lead
24: hinge
25: inlet
26: opening and closing member
30: Spudcan Basics
31: coupling member
32: connecting member
33: lifting module
34: grout outlet
35: grout bag
40: sensor module

Claims (8)

A pile guide for guiding the direction of the piles constructed to penetrate into the seabed ground;
A spudcan foundation for generating a supporting force by being penetrated into the submarine ground;
A connection member configured to be coupled to the spud can base at one end and configured in parallel with the pile guide; And
A frame for interconnecting and fixing the pile guides;
Including,
The spud can foundation protrudes lower than the lower end of the frame and the pile guide,
The connecting member is configured on one side between the pile guide and the center of the frame,
The spud can foundation is penetrated into the submarine ground to support the frame, and guide the construction direction of the pile during pre-piling construction of the pile for installation of an offshore structure,
Pre-filing template using spudcan basis.
The method of claim 1,
The frame has a beam structure of a polygonal shape, and further includes an outer beam constituting the corner of the polygonal shape and an inner beam connecting the vertex and the center point of the polygonal shape,
The connection member and the spud can base is characterized in that configured on one side of the inner beam,
Pre-filing template using spudcan basis.
The method of claim 1,
Control means;
An upper lid configured to seal the upper end of the pile guide and open and close the upper end of the pile guide by the control means;
A lower lid configured to seal the lower end of the pile guide and open and close the lower end of the pile guide by the control means;
An inlet through the upper lead or the lower lead so that seawater flows into the inner space of the pile guide; And
An opening/closing member configured at the inlet port to open and close the inlet port configured in the upper lead or the lower lead by the control means;
Including more,
When the upper lead and the lower lead are closed, buoyancy is generated by the inner space of the pile guide,
Pre-filing template using spudcan basis.
The method of claim 1,
Control means;
A spudcan sensor module configured on the basis of the spudcan to generate spudcan tilt information, which is tilt information based on the spudcan; And
A frame sensor module configured in the frame to generate frame tilt information that is tilt information of the frame;
Including more,
The control means receives the spudcan slope information and the frame slope information, and determines whether or not a punch through based on the spudcan occurs based on a time series change of the spudcan slope information and the frame slope information Characterized in that,
Pre-filing template using spudcan basis.
The method of claim 1,
A grout outlet configured to penetrate the spud-can base vertically, and configured to remain closed and open when the spud-can base is pulled out;
It is configured in the form of a bag configured on the upper part of the spud can base to accommodate the grout therein, and is connected to the grout outlet so that the grout flows below the spud can base with the opening of the grout outlet. Configured grout bag;
Including more,
When the spud can base is pulled out, the grout outlet is opened so that the grout accommodated in the grout bag is discharged below the spud can base,
Pre-filing template using spudcan basis.
The method of claim 1,
An elevating module configured to receive the connecting member and driving the connecting member to slide in a direction parallel to the pile guide;
Including more,
The frame is configured to connect and fix the pile guide and the lifting module,
When the spud-can base is in contact with the submarine ground, the connecting member slides downward to control the elevating module so that the spud-can base penetrates the submarine ground, and then the elevating module so that the horizontal or height of the frame is adjusted. It characterized in that it comprises a control means for controlling the upward or downward driving of the connecting member,
Pre-filing template using spudcan basis.
A pile guide for guiding the direction of the piles constructed to penetrate into the seabed ground; A spudcan foundation for generating a supporting force by being penetrated into the submarine ground; A connection member configured to be coupled to the spud can base at one end and configured in parallel with the pile guide; And a frame for interconnecting and fixing the pile guides; wherein the spud can base protrudes lower than a lower end of the frame and the pile guide, and the connection member is at one side between the pile guide and the center of the frame. A pre-filing template descending step of lowering the configured pre-filing template onto the seabed;
A spud-can foundation penetration step of infiltrating the spud-can foundation into the submarine ground;
A pile construction step of constructing the pile on the subsea ground by passing through the pile guide using a pile penetration device after the spudcan foundation of the pre-filing template is penetrated into the subsea ground;
A spudcan foundation drawing step of drawing the spudcan foundation after the construction of the pile is completed; And
A pre-filing template removal step of lifting and removing the pre-filing template after the drawing of the spud can base is completed;
Including,
It characterized in that installing the offshore structure based on the piles pre-piled after the step of removing the pre-filing template,
How to install offshore structures using pre-filing templates.
A pile guide for guiding the direction of the piles constructed to penetrate into the seabed ground; A spudcan foundation for generating a supporting force by being penetrated into the submarine ground; A connection member configured to be coupled to the spud can base at one end and configured in parallel with the pile guide; And a frame configured to receive the connecting member, the lifting module for driving the connecting member to slide in a direction parallel to the pile guide, and a frame for interconnecting and fixing the pile guide, and the spudcan base includes the frame and the pile guide. The lifting module protruding below the lower end of the pile guide and receiving the connecting member includes a pre-filing template lowering step of lowering the pre-filing template configured at one side between the pile guide and the center of the frame to the submarine ground;
A spud-can foundation penetration step of driving the elevating module after the spud-can foundation is in contact with the submarine ground to penetrate the spud-can foundation into the submarine ground;
An adjustment step of adjusting the horizontal or height of the pre-filing template by controlling the elevating module according to the horizontal inclination or height of the pre-filing template after the spud can base is intrusively installed in the submarine ground;
A pile construction step of constructing the pile on the subsea ground by passing through the pile guide using a pile penetration device after the horizontal or height of the pre-piling template is adjusted;
A spudcan foundation drawing step of drawing the spudcan foundation after the construction of the pile is completed; And
A pre-filing template removal step of lifting and removing the pre-filing template after the drawing of the spud can base is completed;
Including,
It characterized in that installing the offshore structure based on the piles pre-piled after the step of removing the pre-filing template,
How to install offshore structures using pre-filing templates.

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