Emergency grouting equipment and grouting method using an internal type stinger device

Abstract

The present invention relates to emergency grouting equipment and a grouting method using an internal stinger device, and more specifically, to equipment for grouting in the space between a first pile and a second pile when integrating a second pile located outside or inside a first pile, comprising: a stinger device inserted and positioned at the open upper portion of the first pile or the second pile; and a grouting pipe inserted and mounted into the input pipe of the stinger device, with its lower end positioned in the space between the first pile and the second pile; wherein the stinger device comprises: a central vertical frame arranged longitudinally along a central axis; a plurality of horizontal frames connected externally to the central vertical frame; and the input pipe located at the outer end of the horizontal frame. The present invention relates to an emergency grouting device using an internal stinger device, characterized by comprising: a drive wheel unit connected externally to the central vertical frame and driven by contacting the inner surface of the first pile or the second pile; wherein the drive wheel unit is configured to rotate the stinger device after the stinger device is seated inside the first pile or the second pile.

Description

Technology Field

[0001] The present invention relates to emergency grouting equipment and a grouting method using an internal stinger device. Background Technology

[0002] When offshore structures, such as offshore wind turbines or offshore drilling rigs, are installed underwater, they may be corroded or contaminated by seawater. Therefore, the lower portion of the support structure is installed on the seabed, a platform is prepared on the support structure exposed above the sea surface, and the offshore structure is installed on the platform.

[0003] The support structure includes a jacket structure, and the jacket structure includes a plurality of legs of a hollow body and a support plate formed at the lower end of the legs.

[0004] The support plate is in contact with the seabed, and the upper part of the leg is exposed above the sea surface to form a platform. Additionally, adjacent legs are interconnected by connecting bars.

[0005] FIGS. 1 to 3 illustrate cross-sectional views showing a conventional method of constructing an offshore jacket structure. The conventional method of installing an offshore jacket structure involves positioning a jacket leg, which is the lower structure of the jacket structure, on the seabed (1), inserting a jacket pile (pin pile (9)) into the jacket leg (11) to penetrate the seabed, fixing the space between the pin pile (9) and the jacket leg (11) by grouting (30), and filling the inside of the pile (9) with concrete.

[0006] If offshore structures are installed using the conventional method, it takes 48 days per unit, and the time may be extended further due to various variables such as weather conditions during the installation process.

[0007] In other words, this can be a factor leading to an increase in construction costs for offshore wind substructure foundations. For this reason, it has been determined that offshore support structures utilizing the installation methods of existing offshore wind farm substructures are economically inefficient, thus necessitating a stabbing system.

[0008] In addition, structures installed offshore consist of a substructure installed above the seabed and a foundation structure that penetrates below the seabed to secure ground support.

[0009] (A) Substructures exist in various forms such as jacket structures, tripods, and monopiles depending on their shape, and (B) foundation structures are classified into piles, direct foundations, suction foundations, etc.

[0010] Among these, the combination of jacket structure and piles has been used in the offshore oil drilling industry for a long time, and its utility is widely recognized.

[0011] When operating a single or small number of large jackets, the so-called "post-piling" method is used, in which the jacket structure is placed on the seabed and piles are driven into the ground through the legs of the jacket structure. However, in cases where multiple structures must be installed, such as in offshore wind farms, the installation process of the post-piling method is significantly affected by the marine environment.

[0012] When large-scale complexes need to be constructed, the “pre-piling” method is used to reduce costs and construction time. In this method, piles are pre-installed at specific intervals and heights at the installation locations on the seabed, and the structure is finally completed by combining supporting structures with the heads of the piles. As of 2021, this method has been widely implemented in Europe and Taiwan, and is being considered as a viable option for the Southwest Sea Complex in Korea.

[0013] FIGS. 4a to 4d illustrate cross-sectional views showing the process of pre-installing a foundation structure using a template in a conventional pre-piling method.

[0014] As shown in FIG. 4a, first, a template (3) is transported and installed on the seabed (1) for the insertion of a pile (4). Then, as shown in FIG. 4b and FIG. 4c, a pile (4) is inserted into each of the pile insertion guide sections of the template (3). Then, as shown in FIG. 4d, the template (3) is removed to construct a pre-pile. After that, the substructure (10) is transported, and the joint of the jacket leg (11) of the substructure (10) is inserted into the insertion section of the insertion pile (4). Then, the gap between them is grouted (30) to connect them.

[0015] For the successful application of the pre-piling method, it is essential to use a template (3) in which the installation positions of the piles (4) are pre-set to ensure that multiple piles (4) forming the foundation supporting a single substructure (10) are installed in the correct positions with minimal error. To minimize the error between the piles (4), the template (3) is a type of marine robot in which various sensors and hydraulic equipment are integrated, and it is a very expensive piece of equipment. A special vessel is also required to operate the template (3).

[0016] In addition, when constructing penetration piles in the pre-piling method, first, the penetration piles are driven in, and then the pin piles are driven deep into the ground into the penetration piles.

[0017] After constructing the entire penetration pile and placing the jacket leg on the penetration pile, it is relatively easy to check the grouting in the space between the jacket leg and the penetration pile. However, since the pin pile is driven deep into the seabed, it is very difficult to check whether the grouting between the pin pile and the penetration pile has been completed to the designed height, and there is a disadvantage that it is not economical to use divers or monitoring underwater robots.

[0018] Furthermore, a pin pile is installed on the stratum and driven into the ground using a hammer. Afterward, a drilling device is inserted into the pin pile to bore through the bedrock, and an insert pile (penetration pile) is then inserted into the pin pile and installed in the bore. Subsequently, the interior of the bore and the space between the insert pile and the pin pile are grouted. However, a problem exists in that there are no means or methods to resolve the issue if the grouting fails. Therefore, there is a need to find a solution for cases where grouting fails when such conventional grouting equipment is deployed. Prior art literature

[0019] Republic of Korea Registered Patent 10-2761926, Japanese Published Patent JP 05025938, Republic of Korea Registered Patent 10-1747235 The problem to be solved

[0020] Accordingly, the present invention has been devised to solve the aforementioned conventional problems. According to an embodiment of the present invention, when grouting the space between the insert pile and the pin pile using conventional grouting equipment, a stinger device is installed on the top of the pin pile in a situation where grouting fails, and a grouting pipe is inserted into the input pipe of the stinger device and the end of the grouting pipe is inserted into the space between the insert pile and the pin pile to grout the drilled space and the space between the pin pile and the insert pile. The purpose of the invention is to provide an emergency grouting equipment and a grouting method using an internal stinger device.

[0021] According to an embodiment of the present invention, the purpose is to provide an emergency grouting equipment and grouting method using an internal stinger device, wherein the stinger device is seated inside the upper part of a casing located above the sea surface, the stinger device is stably lowered and lowered by guiding its vertical movement through a frame wheel, and after seating, the stinger device is rotated by driving a gear wheel through a drive wheel unit so that the grouting pipe can be accurately positioned in the space between the pin pile and the insert pile.

[0022] Meanwhile, the technical problems to be solved by the present invention are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention belongs from the description below. means of solving the problem

[0023] The first objective of the present invention can be achieved as an emergency grouting device using an internal type stinger device, wherein the device comprises: a stinger device inserted and positioned in the open upper portion of the first pile or the second pile, and a grouting pipe inserted and mounted into the input pipe of the stinger device, with the lower end positioned in the space between the first pile and the second pile, wherein the stinger device comprises: a central vertical frame arranged longitudinally along a central axis; a plurality of horizontal frames connected externally to the central vertical frame; the input pipe located at the outer end of the horizontal frame; and a driving wheel unit connected externally to the central vertical frame and driven by contacting the inner surface of the first pile or the second pile, wherein the stinger device is configured to rotate the stinger device after being seated inside the first pile or the second pile by the driving wheel unit.

[0024] And it may be characterized by including a stinger frame wheel that is spaced apart at a specific distance from at least one of the upper and lower sides of the drive wheel unit, is connected to the outside of the central vertical frame, and contacts the inner surface of the first pile or the second pile to guide the vertical movement of the stinger device.

[0025] In addition, it may be characterized by including a plurality of radial reinforcing members arranged radially outwardly on the central vertical frame; and a connecting reinforcing member connecting the radial reinforcing members.

[0026] It may be characterized by including a lower portion having a shape in which the diameter decreases toward the lower side.

[0027] In addition, the second pile is a pin pile that penetrates the stratum of the seabed, and the first pile is an insert pile that is inserted into the second pile and penetrates the bedrock layer of the seabed; after a casing is installed that is seated on the top of the pin pile, the stinger device is seated inside the top of the casing located above the sea surface, and then the frame wheel is driven to move the stinger device.

[0028] And the above drive wheel unit may be characterized by including a drive motor, a gearbox driven by the drive motor, and a gear wheel connected to the gearbox and driven by contacting the inner surface of the casing and the pin pile.

[0029] In addition, the gearbox may be characterized by comprising: a first bevel gear that rotates on a first rotation axis which is rotated by a drive motor and whose longitudinal direction is outward; a second bevel gear that rotates in mesh with the first bevel gear; a second rotation axis that is perpendicular to the first rotation axis and rotates by the rotation of the second bevel gear; a third gear that rotates on the second rotation axis; and a gear wheel that rotates in mesh with the third gear.

[0030] And the above frame wheel may be characterized by including an elastic unit provided between the central vertical frame and the wheel, which causes the wheel to make compressed contact with the inner surface of the first pile or the second pile.

[0031] The second objective of the present invention can be achieved by an emergency grouting method using an internal stinger device, characterized by comprising: a first step of settling a pin pile on the seabed and penetrating it into a stratum; a second step of settling a casing on the top of the pin pile and drilling a bedrock layer below the stratum into which the pin pile has been penetrated; a third step of inserting an insert pile into the pin pile and positioning it within the drilled hole; a fourth step of inserting and settling an internal stinger device according to the first objective mentioned above into the top of the casing located above the sea surface and mounting a grouting pipe through the insertion pipe of the stinger device; a fifth step of lowering the stinger device so that the lower end of the grouting pipe is positioned in the space between the pin pile and the insert pile; and a sixth step of grouting the space between the pin pile and the insert pile and the space inside the drilled hole.

[0032] And in the above fifth step, a plurality of stinger frame wheels connected to the central vertical frame at a specific distance apart from at least one of the upper and lower sides of the drive wheel unit may be in contact with the inner surface of the casing and pin pile to guide the vertical movement of the stinger device.

[0033] In addition, after the fifth step, the method may be characterized by including a step of rotating the stinger device inside the pin pile around the longitudinal axis of the central vertical frame of the stinger device by driving the gear wheel of the drive wheel unit so that the grouting pipe is positioned in the space between the pin pile and the insert pile. Effects of the invention

[0034] According to the emergency grouting equipment and grouting method using an internal stinger device according to an embodiment of the present invention, when grouting the space between the insert pile and the pin pile using conventional grouting equipment, in a situation where grouting fails, the stinger device is installed on the top of the pin pile, and a grouting pipe is inserted into the input pipe of the stinger device and the end of the grouting pipe is inserted into the space between the insert pile and the pin pile, thereby having the effect of grouting the space between the drilling space and the space between the pin pile and the insert pile.

[0035] According to the emergency grouting equipment and grouting method using an internal stinger device according to an embodiment of the present invention, after the stinger device is placed inside the upper part of a casing located above the sea surface, the stinger device is stably raised and lowered by guiding its vertical movement through a frame wheel, and after placement, the gear wheel is driven through a drive wheel unit to rotate the stinger device, thereby having the effect of accurately positioning the grouting pipe in the space between the pin pile and the insert pile.

[0036] Meanwhile, the effects obtainable from the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present invention belongs from the description below. Brief explanation of the drawing

[0037] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIGS. 1 to 3 are cross-sectional views showing a conventional method of constructing an offshore jacket structure. FIGS. 4a to 4d are cross-sectional views showing the process of pre-installing a foundation structure using a template in a conventional pre-piling method. FIG. 5 is a flowchart of a grouting method using emergency grouting equipment with a stinger device according to an embodiment of the present invention, FIG. 6a is a cross-sectional view of the space between the pin pile and the insert pile and the borehole after grouting is completed. FIG. 6b is a cross-sectional view of a grouting failure state, FIG. 7 is a cross-sectional view of a state in which a casing is seated on the top of a pin pile according to an embodiment of the present invention. FIG. 8 is a cross-sectional view showing an internal stinger device seated inside the upper part of a casing and a grouting pipe connected according to an embodiment of the present invention. FIG. 9 is a cross-sectional view of an internal stinger device entering the inside of a pin pile according to an embodiment of the present invention. FIG. 10 is a cross-sectional view showing a state in which an internal stinger device is positioned on the upper side of an insert pile and grouting is performed according to an embodiment of the present invention. FIG. 11 is a first cross-sectional view of an internal stinger device according to an embodiment of the present invention, FIG. 12 is a cross-sectional view of AA of FIG. 11, FIG. 13 is a cross-sectional view of BB of FIG. 11, FIG. 14 is a CC cross-sectional view of FIG. 11, FIG. 15 is a second cross-sectional view of an internal stinger device according to an embodiment of the present invention, FIG. 16 is a cross-sectional view of AA of FIG. 15, FIG. 17 is a cross-sectional view of the BB in FIG. 15, FIG. 18 is a CC cross-sectional view of FIG. 15, FIG. 19a is a side view of a gearbox according to an embodiment of the present invention, FIG. 19b is a plan view of a gearbox according to an embodiment of the present invention, FIG. 20a is a side view of a stinger frame wheel according to an embodiment of the present invention, FIG. 20b illustrates a plan view of a stinger frame wheel according to an embodiment of the present invention. Specific details for implementing the invention

[0038] The above objects, other objects, features, and advantages of the present invention will be easily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete and to ensure that the spirit of the invention is sufficiently conveyed to a person skilled in the art.

[0039] In this specification, when a component is described as being on another component, it means that it may be formed directly on the other component or that a third component may be interposed between them. Also, in the drawings, the thicknesses of the components are exaggerated for the effective description of the technical content.

[0040] The embodiments described herein will be described with reference to cross-sectional and / or plan views, which are exemplary illustrations of the invention. In the drawings, the thicknesses of films and regions are exaggerated for effective explanation of the technical content. Accordingly, the shapes of the exemplary drawings may be modified by manufacturing techniques and / or tolerances, etc. Accordingly, the embodiments of the invention are not limited to the specific shapes depicted but include variations in shape produced according to the manufacturing process. For example, a region depicted as a right angle may be rounded or have a certain curvature. Accordingly, the regions illustrated in the drawings have properties, and the shapes of the regions illustrated in the drawings are intended to illustrate specific shapes of the regions of the device and are not intended to limit the scope of the invention. Although terms such as first, second, etc., have been used to describe various components in the various embodiments of this specification, these components should not be limited by such terms. These terms are used merely to distinguish one component from another. The embodiments described and illustrated herein also include their complementary embodiments.

[0041] The terms used herein are for describing the embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used herein, 'comprises' and / or 'comprising' do not exclude the presence or addition of one or more other components to the mentioned components.

[0042] In describing the specific embodiments below, various specific details have been included to explain the invention more specifically and to aid understanding. However, a reader with sufficient knowledge in the art to understand the invention will recognize that it can be used without these various specific details. In some cases, it is noted in advance that commonly known aspects that are not significantly related to the invention have been omitted to prevent unnecessary confusion in describing the invention.

[0044] Below, the configuration, function, and grouting method using an emergency grouting device with an internal stinger device according to an embodiment of the present invention will be described.

[0045] Below, the configuration and function of an emergency grouting device using a stinger device according to an embodiment of the present invention will be described. In addition, a grouting method using such an emergency grouting device using a stinger device will be described.

[0046] FIG. 5 illustrates a flowchart of a grouting method using an emergency grouting device with a stinger device according to an embodiment of the present invention.

[0047] First, Fig. 6a shows a cross-sectional view of the space between the pin pile and the insert pile and the borehole after grouting is completed. Fig. 6b shows a cross-sectional view of the state where grouting failed.

[0048] FIG. 7 is a cross-sectional view showing the state in which emergency grouting equipment using a stinger device according to an embodiment of the present invention is installed.

[0049] First, the method of installing pin piles through pre-piling will be briefly explained. Before installing the substructure (10) of the offshore wind power structure, pin piles (9) are first installed in the correct position.

[0050] First, the pin pile (9) is accurately driven into the ground layer (5) at the installation location, then a casing is placed on top of the pin pile (9), and then a rock layer is drilled (8) through a drilling device below the pin pile (9), and then an insert pile (4) is placed on the drilled hole (8). Then, the space between the drilled hole (8), the insert pile (4), and the pin pile (9) is grouted through a grouting device (S70).

[0051] The grouting device is inserted into the pin pile (9) to inject grout. However, if this grouting operation fails, there is no way to resolve it.

[0053] As shown in FIG. 6b, a measuring unit (270) composed of a contact sensor, etc. is installed on the outer surface of the insert pile (4) or the inner surface of the pin pile (9), and if no grout material is detected by the measuring unit (270) for a specific period of time, it is determined that the grouting has failed (S71, S72). Alternatively, if the grout pipe is blocked (or if the pressure gauge on the grout pipe increases abnormally), it is determined that the grouting has failed.

[0055] Emergency grouting equipment using an internal stinger device according to an embodiment of the present invention is installed when grouting fails by a conventional grouting device (S73).

[0056] First, the casing is placed on top of the pin pile, and then an internal stinger device (200) is installed inside the top of the casing above the sea surface. FIG. 7 is a cross-sectional view of the state in which the casing is placed on top of the pin pile according to an embodiment of the present invention.

[0057] Then, the stinger device is mounted inside the upper part of the casing (S73), and the grouting pipe (160) is inserted into each of the injection pipes (141) of the stinger device (100) to inject it (S74).

[0058] FIG. 8 is a cross-sectional view showing an internal stinger device installed inside the upper part of a casing and a grouting pipe connected according to an embodiment of the present invention.

[0059] Then, the internal stinger device (100) is introduced into the casing (20) and the pin pile (8). FIG. 9 is a cross-sectional view showing the internal stinger device entering the pin pile according to an embodiment of the present invention.

[0060] The internal stinger device (100) is inserted until the lower end of the grouting pipe (160) is positioned in the space between the insert pile (4) and the pin pile (9) (S75).

[0061] At this time, an internal stinger device (100) is inserted and secured into the upper interior of a casing (20) located above the sea surface, a grouting pipe (160) is installed through the input pipe (141) of the stinger device (100), and the stinger device (100) is lowered so that the lower end of the grouting pipe (160) is positioned in the space between the pin pile (9) and the insert pile (4).

[0062] And a plurality of stinger frame wheels (130) connected to the central vertical frame at a specific distance from at least one of the upper and lower sides of the drive wheel unit (120) are in contact with the inner surface of the casing (20) and the pin pile (9) to guide the vertical movement of the stinger device (100).

[0063] Then, by driving the gear wheel (128) of the drive wheel unit (120), the stinger device (100) is rotated inside the pin pile (9) around the longitudinal axis of the central vertical frame (110) of the stinger device (100) so that the grouting pipe (160) is positioned in the space between the pin pile (9) and the insert pile (4).

[0064] And when the setting is complete, grout is injected through the grouting pipe (260) to grout the space between the hole (8), the insert pile (4), and the pin pile (9) (S76).

[0065] FIG. 10 is a cross-sectional view showing a state in which an internal stinger device is positioned on the upper side of an insert pile and grouting is performed according to an embodiment of the present invention.

[0067] Below, the configuration of the internal stinger device (200) according to an embodiment of the present invention will be described in more detail.

[0068] FIG. 11 illustrates a first cross-sectional view of an internal stinger device according to an embodiment of the present invention. FIG. 12 illustrates the AA cross-sectional view of FIG. 11, FIG. 13 illustrates the BB cross-sectional view of FIG. 11, and FIG. 14 illustrates the CC cross-sectional view of FIG. 11.

[0069] And FIG. 15 shows a second cross-sectional view of an internal stinger device according to an embodiment of the present invention. Also, FIG. 16 shows the AA cross-sectional view of FIG. 15, FIG. 17 shows the BB cross-sectional view of FIG. 15, and FIG. 18 shows the CC cross-sectional view of FIG. 15.

[0070] And FIG. 19a shows a side view of a gearbox according to an embodiment of the present invention, and FIG. 19b shows a top view of a gearbox according to an embodiment of the present invention.

[0071] In addition, FIG. 20a shows a side view of a Stinger frame wheel according to an embodiment of the present invention, and FIG. 20b shows a top view of a Stinger frame wheel according to an embodiment of the present invention.

[0072] The emergency grouting equipment using an internal stinger device according to an embodiment of the present invention is a device for grouting the space between the pin pile (9) and the insert pile (4) when grouting by a conventional grouting device fails, in the case of integrating the insert pile (4) located inside the lower part of the pin pile (9) overall.

[0074] In an embodiment of the present invention, the internal stinger device (100) may be configured to include a central vertical frame (110) overall, a horizontal frame (140) protruding radially outward from the central vertical frame (110), a radial reinforcing member (212), a driving wheel unit (120), a frame wheel (130), etc.

[0075] Accordingly, after the stinger device (100) is placed inside the upper part of the casing (20) located above the sea surface, the stinger device (100) is stably raised and lowered by guiding its vertical movement through the frame wheel (130), and after the stinger device is lowered to a desired position, the stinger device (100) is rotated inside the pin pile (9) around the longitudinal axis of the central vertical frame (110) of the stinger device (100) by the driving of the gear wheel (128) of the drive wheel unit (120) so that the grouting pipe (160) is positioned in the space between the pin pile (9) and the insert pile (4).

[0076] The central vertical frame (110) of the stinger device according to an embodiment of the present invention is cylindrical and arranged longitudinally along the central axis.

[0077] And the horizontal frame (140) is configured to be connected to the central vertical frame (110) on the outside in multiple ways. And an injection pipe (141) is located at the outer end of this horizontal frame (140). A grouting pipe (160) is installed in the injection pipe (141).

[0078] These horizontal frames (140) may be composed of multiple units spaced apart from each other along the longitudinal direction of the central vertical frame (110). Additionally, an inlet (142) with an increasing diameter toward the upper side may be installed at the top of the inlet pipe (141).

[0079] The drive wheel unit (120) according to an embodiment of the present invention is configured to be connected to the central vertical frame (110) externally at both ends or radially connected, and to be driven by contacting the inner surface of the casing (20) and pin pile (90). That is, by driving the gear wheel (128) of the drive wheel unit (120), the stinger device (100) is rotated inside the pin pile (9) around the longitudinal axis of the central vertical frame (110) of the stinger device (100), thereby adjusting the grouting pipe (160) so that it is positioned in the space between the pin pile (9) and the insert pile (4).

[0080] At this time, a measuring means composed of a vision sensor or the like can be included on one side of the stinger device (100) to photograph the space between the insert file (4) and the pin file (9), and the measured image data can be monitored and the stinger device (100) can be rotated through the drive wheel unit (120) to adjust the position of the grouting tube (160) in the space between the pin file (9) and the insert file (4).

[0081] After the casing (20) is installed on the top of the pin pile (9), the stinger device (100) is installed inside the top of the casing (20) located above the sea surface, and then the drive wheel unit (120) is driven to allow the stinger device (100) to enter.

[0082] And the stinger frame wheel (130) is configured to be connected radially outwardly to the central vertical frame at specific intervals on the upper and lower sides of the drive wheel unit (120).

[0083] The frame wheel (130) comes into contact with the inner surface of the casing (20) and pin pile (9) to guide the vertical movement of the stinger device (100).

[0084] And a plurality of radial reinforcing members (111) are arranged radially outwardly on the central vertical frame (110). And a connecting reinforcing member (112) is configured to connect these radial reinforcing members (111). A reinforcing unit formed by combining these radial reinforcing members (111) and connecting reinforcing members (112) may be composed of a plurality of units spaced apart from each other along the longitudinal direction of the central vertical frame (110).

[0085] And the internal stinger device according to an embodiment of the present invention includes a lower portion (150) having a shape in which the diameter decreases toward the lower side. In this lower portion (150), plate-shaped lower plates (151) having tapered surfaces may be arranged radially to each other.

[0087] A drive wheel unit (120) according to an embodiment of the present invention may be configured to include a housing (121), a drive motor (122), a gearbox, and a gear wheel (128).

[0088] That is, the drive wheel unit (120) may be configured to include a drive motor (122), a gearbox driven by the drive motor (122), and a gear wheel (128) connected to the gearbox and driven by contacting the inner surface of the casing (20) and pin pile (9).

[0089] It can be seen that the gearbox according to an embodiment of the present invention can be configured by applying a bevel gear, as shown in FIGS. 19a and 19b.

[0090] The first bevel gear (124) is rotated by a drive motor (122) and is configured to rotate on a first rotation axis (123) in which the longitudinal direction is the outer direction.

[0091] And the second bevel gear (125) rotates in mesh with the first bevel gear (124).

[0092] And the second rotation axis (126) is perpendicular to the first rotation axis (123) and is configured to rotate by the rotation of the second bevel gear (125).

[0093] And the third gear (127) is configured to rotate on the second rotation axis (126), and the gear wheel (128) is configured to rotate by engaging with this third gear.

[0094] Accordingly, the stinger device (100) is rotated inside the pin pile (9) by the driving of the gear wheel (128) of the driving wheel unit (120) with respect to the longitudinal axis of the central vertical frame (110) of the stinger device (100), thereby adjusting the grouting pipe (160) to be positioned in the space between the pin pile (9) and the insert pile (4).

[0095] In addition, the frame wheel (130) according to an embodiment of the present invention may be configured to include an elastic unit between the central vertical frame (110) and the wheel (131). Thus, the wheel (131) may be configured to make compressed contact with the inner surface of the casing (20) and the pin pile (9) by means of the elastic unit.

[0096] As illustrated in FIGS. 20a and 20b, an elastic unit according to an embodiment of the present invention comprises a cylinder portion (132) connected to a central vertical frame (110), a piston portion (133) placed inside the cylinder portion (132), and a spring (134) placed between the inside of the cylinder and the inner surface of the piston portion (133), and a wheel (131) is installed on the outer surface of the piston portion (133). Accordingly, the wheel (131) can be configured to make compressed contact with the inner surface of the casing (20) and pin pile (9) by means of this elastic unit. Explanation of the symbols

[0097] 1: Seafloor 3: Template 4: Intrusion file, Insert file 5: Stratigraphy 6: Rock layer 8: Sky 9: Pin file 10: Substructure 11: Jacket Leg 20: Casing 30: Grouting 100: Stinger device 110: Central vertical frame 111: Radial reinforcing member 112: Connecting reinforcement member 120: Drive wheel unit 121: Housing 122: Drive motor 123: First rotation axis 124: First bevel gear 125: Second bevel gear 126: Second rotation axis 127: 3rd gear 128: Gear wheel 130: Frame Wheel 131: Wheel 132: Cylinder section 133: Piston part 124: Spring 140: Horizontal frame 141: Injection tube 141: Input 150: Bottom part 151: Paper Plate 160: Grouting pipe 170:Measurement section

Claims

Claim 1 Emergency grouting equipment using an internal stinger device, wherein the equipment for grouting the space between the first pile and the second pile, wherein the second pile located outside or inside the first pile is integrated with the first pile, comprises: a stinger device inserted and positioned at the open upper portion of the first pile or the second pile; and a grouting pipe inserted and mounted into the input pipe of the stinger device, with its lower end positioned in the space between the first pile and the second pile; wherein the stinger device comprises: a central vertical frame arranged longitudinally along a central axis; a plurality of horizontal frames connected externally to the central vertical frame; the input pipe located at the outer end of the horizontal frame; and a drive wheel unit connected externally to the central vertical frame and driven by contacting the inner surface of the first pile or the second pile, wherein the stinger device is configured to rotate the stinger device after being seated inside the first pile or the second pile by the drive wheel unit. Claim 2 Emergency grouting equipment using an internal type stinger device, characterized in that, in claim 1, it includes a stinger frame wheel that is spaced apart at a specific distance from at least one of the upper and lower sides of the drive wheel unit, is externally connected to the central vertical frame, and contacts the inner surface of the first pile or the second pile to guide the vertical movement of the stinger device. Claim 3 Emergency grouting equipment using an internal stinger device, characterized in that, in claim 2, it comprises: a plurality of radial reinforcing members arranged radially outwardly on the central vertical frame; and a connecting reinforcing member connecting the radial reinforcing members. Claim 4 Emergency grouting equipment using an internal stinger device, characterized by including, in claim 3, a lower portion having a shape in which the diameter decreases toward the lower side. Claim 5 Emergency grouting equipment using an internal stinger device according to claim 4, wherein the second pile is a pin pile driven into the stratum of the seabed, the first pile is an insert pile inserted into the second pile and driven into the bedrock layer of the seabed, and after a casing is installed that is seated on the top of the pin pile, the stinger device is seated inside the top of the casing located above the sea surface, and the stinger frame wheel is driven to drive the stinger device. Claim 6 Emergency grouting equipment using an internal stinger device, characterized in that, in claim 5, the drive wheel unit comprises a drive motor, a gearbox driven by the drive motor, and a gear wheel connected to the gearbox and driven by contacting the inner surface of the casing and the pin pile. Claim 7 Emergency grouting equipment using an internal stinger device according to claim 6, wherein the gearbox comprises: a first bevel gear that rotates on a first rotation axis which is rotated by a drive motor and whose longitudinal direction is outward; a second bevel gear that rotates in mesh with the first bevel gear; a second rotation axis that is perpendicular to the first rotation axis and rotates by the rotation of the second bevel gear; a third gear that rotates on the second rotation axis; and a gear wheel that rotates in mesh with the third gear. Claim 8 Emergency grouting equipment using an internal stinger device, characterized in that, in claim 2, the stinger frame wheel comprises an elastic unit provided between the central vertical frame and the wheel to cause the wheel to make compressed contact with the inner surface of the first pile or the second pile. Claim 9 Emergency grouting method using an internal stinger device, characterized by comprising: a first step of settling a pin pile on the seabed and penetrating it into a stratum; a second step of settling a casing on top of the pin pile and drilling a bedrock layer below the stratum into which the pin pile has been penetrated; a third step of inserting an insert pile into the pin pile to position the insert pile within the drilled hole; a fourth step of inserting and settling an internal stinger device according to any one of claims 1 to 8 into the upper part of the casing located above the sea surface and mounting a grouting pipe through the insertion pipe of the stinger device; a fifth step of lowering the stinger device so that the lower end of the grouting pipe is positioned in the space between the pin pile and the insert pile; and a sixth step of grouting the space between the pin pile and the insert pile and the internal space of the drilled hole. Claim 10 An emergency grouting method using an internal stinger device, characterized in that, in the fifth step, a plurality of stinger frame wheels connected externally to the central vertical frame and spaced apart at a specific interval from at least one of the upper and lower sides of the drive wheel unit contact the inner surface of the casing and pin pile to guide the vertical movement of the stinger device. Claim 11 An emergency grouting method using an internal stinger device, characterized in that, in claim 10, after the fifth step, the stinger device is rotated inside the pin pile by driving the gear wheel of the drive wheel unit with respect to the longitudinal axis of the central vertical frame of the stinger device so that the grouting pipe is positioned in the space between the pin pile and the insert pile.

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