KR20110013929A - Net type support device of monopile for supporting seaside or seabed soft ground - Google Patents

Abstract

PURPOSE: A net-type support tool of single support pile for weak ground for holding a marine structure is provided to decrease the pile-driving depth of single pile and to ensure greatest pile supporting force when the marine structure is installed on weak ground, such as a layer of mud. CONSTITUTION: A net-type support tool of single support pile for weak ground for holding a marine structure comprises a net-type support(20) and a support adapter(40). The net-type support is detachably fixed to a support pile(10) at a given height. The support pile is driven into weak ground. The support adapter is installed on the upper end of the support pile, fixes and supports an upper support structure horizontally. The net-type support comprises tubular through-holes, a plurality of radial plates and a plurality of outer plates. The support pile passes through the tubular through-holes. The radial plates are extended from the through holes radially. The outer plates are extended at intervals in the outer circumferential direction of the through hole to cross the radial plates to form a plurality of rooms.

Description

NET TYPE SUPPORT DEVICE OF MONOPILE FOR SUPPORTING SEASIDE OR SEABED SOFT GROUND}

The present invention relates, for example, to a net support mechanism of a single support pile for soft ground for installation of offshore structures. More particularly, the present invention relates to onshore or offshore support in the installation of structures such as wind power towers. If the ground is a soft ground such as a strata, the pile can be used to reinforce the bearing capacity of a single pile installed to reinforce the bearing capacity of the horizontal and vertical loads of the ground, to reduce the driving depth, and to obtain a stronger bearing capacity at a limited driving depth. It is related with the net type support mechanism which can be removable.

In general, in the case of installing various types of large-capacity structures such as wind power towers on land or offshore, a method of driving piles is used to fix the lower structure of the structure to the ground, and in particular, in the case of installation at sea, Considering various factors such as horizontal load and vertical load according to the shape, weight, and structural dynamics of offshore structures, the monopile type is similar to the case of Europe in the case of shallow water where the depth of the seabed is suitable for piling. A monolithic substructure is installed and an offshore structure is installed on top.

The monopile type (monopile type) has the advantage of being able to secure the lower structure firmly to the ground or the sea floor only by the simplicity of pile production and the single piling process, in accordance with the peculiarity of the single pile method. In the case of geological areas where the soft ground is developed, such as geological formations, it is necessary to carry out processes such as soil reinforcement or geological improvement in order to secure the required depth of navigation, or to increase the diameter of the pile or to carry out deeper depth. In order to do this, higher level manpower and equipment should be input.

For example, when installing a marine structure such as a platform on the sea, in consideration of various matters, a multi-leg pile type structure, such as a jacket, which is prepared in advance on the land, is manufactured at the land. There is a jacket method to install the upper structure to be transported to the installation, and piled through the piling sphere formed in the structure to the lower structure on the sea floor ground.

However, this jacket method has already proved the stability of the structure, but it takes a long time to manufacture, the structure is very complicated, and many welding sites require skilled technology and careful management of the process. Since it requires a structure that reaches the surface of the water, which is possible to install the structure, a large amount of materials and manpower must be input to manufacture the structure, and after the installation, various complicated preparation processes for installing the upper structure are required.

In addition, as in the case of a suction pile, an earth anchor is formed on the bottom of the deep sea surface, which is difficult to apply a direct pile method, to secure supporting force and to be connected to the lower part of the floating marine structure through a chain or wire. There is also a method of using the fixing method.

However, it is impossible to install an upper structure such as an offshore wind tower that requires vertical and horizontal loads simultaneously such as an offshore tower in the lower structure formed by the suction pile method. The fabrication of substructures is essential.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to reduce the depth of the driving of the single support pile that is installed on the soft ground when the marine structure is installed on the soft ground, such as a floor; It is to provide a net support mechanism of a single support pile for soft ground that can secure maximum pile support.

Another object of the present invention is to perform a conventional ground compaction method or geological improvement process to secure the bearing capacity of the pile, which is the original purpose of the filing, in a single pile that is installed at the time of installation of a large-scale structure on the soft ground on land or sea. The present invention provides a net support mechanism of a single support pile for soft ground, which can eliminate the filing capacity obtained through a conventional process.

Another object of the present invention is to be stabilized by increasing the horizontal load and the vertical load as well as reducing the depth of rudder and being not affected by the geological and ground conditions of the ground formed in the soft ground such as the fault when installing the marine structure on the sea floor or the coast. It is to provide a net support mechanism of a single support pile for soft ground to secure a bearing capacity to form the substructure.

It is another object of the present invention to provide a net support mechanism of a single support pile for soft ground that can be applied to piles of existing structures requiring reinforcement as well as new installation piles in piles installed at the time of installation of onshore or offshore structures. It is.

Another object of the present invention is to form a plurality of compartments in the net support mechanism to expand the contact area with the soft ground such as a large floor to double the support performance in accordance with the increase in contact resistance and to improve the support performance through the adjustment and expansion of the inclination angle of the partition wall It is to provide a net support mechanism of a single support pile for soft ground that can be further doubled.

Another object of the present invention is to provide a net support mechanism of a single support pile for soft ground, which is installable and adjustable at a desired height position of the driven main support pile or at or above the ground of the soft ground.

Another object of the present invention is to provide a single support pile for soft ground having an adapter of flange type to replace the existing transition piece to ensure balance and stability of the structure installed on the driving pile and to facilitate installation. It is to provide a net type support mechanism.

In order to achieve the above object of the present invention, the present invention provides a net support mechanism of a single support pile for soft ground, the net support mechanism is a cylindrical through-hole through which the support pile is driven on the soft ground and the The support pile provided with a plurality of radial diaphragms extending radially from the through hole and a plurality of outer periphery plates spaced apart in the circumferential direction of the through hole so as to intersect the radial diaphragm to form a plurality of compartments, and installed on the soft ground; At least one net-type support is fixedly installed at a predetermined height position, characterized in that it comprises a support adapter which is installed on the top of the driven support pile is fixed to support the upper support structure horizontally.

In one embodiment, the support adapter has an upper open body consisting of an upper portion having an inner circumferential fixing flange to which the upper support structure is fixedly installed and a lower portion coupled to an upper portion of the support pile to communicate with the support pile. It features.

In one embodiment, the through-hole and the support pile is cylindrical, the through-hole is characterized in that larger than the diameter of the support pile through the through hole.

In one embodiment, between the through-hole and the support piles driven through it is characterized in that the reinforcing wedge for the sewage bonding using a hydraulic rod (reach rod) or a hydraulic pressure is applied for fixing each other.

In one embodiment, the through hole and the support pile driven therethrough are welded together.

In one embodiment, the overall shape of the net support including the plurality of compartments is characterized in that one of circular, oval, polygonal, cross, snow crystal, honeycomb, and combinations thereof.

In one embodiment, an end portion of at least one of the radial diaphragm and the outer circumferential plate of the net support is further characterized by a skirt portion.

In one embodiment, the plurality of partitions constituting the compartment is characterized in that arranged at a predetermined inclination angle with respect to the vertical axis.

In one embodiment, the inclination angle of the partition wall is characterized in that the range of 0 ° to 45 °.

In one embodiment, the net support is characterized in that it consists of a pair of half assembling each other divided around the through-hole.

In one embodiment, the netted support is arranged at a height position between the soft base top and a predetermined depth in the driven support pile.

In one embodiment, it characterized in that it further comprises a top closed net support including a cover for closing the top surface of the net support.

In one embodiment, the cover is characterized in that a plurality of receiving holes are formed.

In one embodiment, the upper closed netted support is arranged at a height position near the top of the soft base in the driven support pile.

According to the above-described configuration of the present invention, in carrying out the filing in a region where soft ground is widely developed, by using a single integrated net support mechanism, bearing capacity can be increased by increasing the contact area of the soft ground by a plurality of compartments. Compared to the prior art, in which a single pile of large diameters has to be driven for reinforcement of supporting force in soft geology, it is possible to support a large superstructure having a high load by using a support pile of a small diameter.

In addition, it can be installed at any height position of the driven support pile, and the deformation and installation number of the net type support can be adjusted, and the shape and angle of the entire support shape and the partition wall of the compartment can be adjusted. It has flexibility in installation which can secure the optimal support ability according to the back.

It can also replace processes such as lipid improvement to reinforce soft ground.

In addition, the driving depth of the file can be reduced during the filing operation.

In addition, it is possible to maximize the bearing capacity of the pile even at the same driving depth.

In addition, the skirt portion disposed at a predetermined inclination angle can further exclude scouring at the contact surface between the pile portion and the sea bottom surface caused by the vortex phenomenon of the water.

In addition, by the configuration of the net support mechanism of the divided structure, it is possible to install in order to increase the bearing capacity of the structure even in the pile in which the upper structure is already installed.

In addition, since the number of piles can be reduced, large equipment for filing large diameter steel pipe piles is not required.

In addition, by installing the support adapter, it is possible to secure the horizontal structure and stability of the upper structure without using the conventional expensive transition apparatus, and the installation is easy.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the net support mechanism of the support pile for soft ground according to the present invention is a support mechanism detachable from the support pile for supporting a large structure installed on the soft ground of the land or water (particularly at sea). It is to be understood that geologically improper grounds for the site of the structure, in particular can be characterized by the ocean floor or coastal faults, and large structures, for example, wind generators.

1 is a perspective view of a net support of a net support mechanism of a support pile for soft ground according to the present invention, and FIG. 2 is a perspective view of a modification in which a circumference is further formed at the outermost periphery of the net support of FIG. 3 is a perspective view illustrating an embodiment of a configuration in which a closing cover is further installed on the net support of FIG. 1.

Referring to these figures, the illustrated net support mechanism of the soft ground support pile is at least one net support 20 which is detachably fixed to a predetermined height of the support pile 10 driven on the soft ground such as a floor. And a support adapter 40 installed at an upper end of the driving support pile 10 installed to horizontally support the upper support structure.

The net support 20 is a cylindrical through-hole 21 through which the support pile 10 installed on the soft ground penetrates, and a plurality of radial diaphragms 25 extending radially from the through-hole 21 and the radial. It includes a plurality of outer peripheral plates (23a, 23b, 23c) spaced apart in the circumferential direction of the through-hole 21 so as to cross the diaphragm 25 to form a plurality of compartments.

The through hole 21 and the support pile 10 driven therethrough are usually cylindrical, and the through hole 21 is larger than the diameter of the support pile 10.

Between the through hole 21 and the support piles 10 and 13 driven therethrough, a reach rod into which an adhesive such as grout is injected may be disposed to fix each other.

In addition, the uneven wedge (not shown) is disposed between the through hole 21 and the support piles 10 and 13 driven therethrough to be mutually joined by swaging using a hydraulic actuator from the outside. This can be done simply by welding.

As shown, the overall shape of the net support 20 is circular, each compartment is approximately arc-shaped, the radial diaphragm 25 is eight rectangular plates, and the outer circumferential plates 23a, 23b, 23c are Although illustrated as three circular plates, the shape and number are not limited, and may be changed as necessary.

For example, the overall shape of the net support 20 including the plurality of compartments may be one of ovals, polygons, crosses, snow crystals, honeycombs, and combinations thereof, the choice of which shape may be a topographic map of soft ground, The optimal bearing capacity is calculated by considering various factors such as the geology and the driving depth of the main support pile and selected accordingly.

In order to increase the bearing capacity of the net-shaped support 20 embedded in the soft ground and contacting the ground such as a stratum, the plurality of partitions constituting the compartment may have a predetermined inclination angle with respect to the vertical axis, for example, an inclination angle in the range of 0 ° to 45 °. It can be arranged as.

Such an inclination angle is such that each compartment of the net support 20 embedded in the floor is contacted to support the floor at a predetermined angle, so that the load direction is dispersed to a degree corresponding to the inclination angle, and thus the net support 20 changes in the water. It helps to resist loads.

In a similar vein, at least one end of the radial diaphragm 25 and the outer circumference plates 23a, 23b, 23c of the net support 20 ′ adds a skirt portion 23c ′ as shown in FIG. 2. (In FIG. 2, the skirt portion is formed only on the outermost outer circumferential plate 23c).

This skirt also brings about an increase in the area of contact with the soft ground.

On the other hand, although not shown, the net support 20 may be composed of a pair of half parts that can be assembled to each other divided around the through-hole 21.

This has the advantage that it can be easily installed at a desired height position in the support pile 10 driven on the soft ground, so that it can be easily attached to the support pile of the supporting equipment to repair and reinforce the supporting equipment already completed and in use. There are advantages to it.

The net support 20 is lowered by its own weight in the water due to its open compartment structure to dig into a soft ground such as a stratum, and is typically positioned at a height between the top of the soft ground (SB) and a predetermined depth in the driven support pile. Is placed on.

According to one embodiment of the invention, the net support mechanism of the present invention further comprises an upper closed net support 30 further comprising a cover 35 for closing the top surface of the net support 20. (See FIG. 3).

The cover 35 includes a through hole 31 through which the support pile 10 passes, and a plurality of receiving holes 33 are formed on an upper surface thereof.

The size and number of the receiving holes 33 are selected in consideration of the descending speed of the support itself, the desired height position and the like.

The upper closed net support 30 is mainly closed by the upper cover, which is almost closed even when installed in the support pile 10 as compared to the above-described net support 20 embedded by self-weight into the floor SB. Since the descending speed is low in water and self-weight is canceled by buoyancy, it is disposed at the height position of the support pile 10 corresponding to the upper surface side of the burial layer SB, and thus, the above-described net support 20 and In the case of the combination arrangement, the net support 20 is mainly embedded into the floor SB, and the upper closed net support 30 is positioned above the floor SB.

The combination and placement of these net supports are selected in consideration of the terrain, geology and desired bearing capacity of the soft ground.

On the other hand, referring to Figure 7, the support adapter 40 is fixed to the upper portion of the support pile 10 serves to horizontally support the upper support structure.

The support adapter 40 has an upper open type body having an upper portion having a fixing flange 41 in an inner circumferential direction in which the upper supporting structure is fixed and a lower portion coupled to an upper portion of the supporting pile 10. In the lower portion, a hole 43 communicating with the support pile 10 is formed.

The fixing flange 41 of the upper portion of the support adapter 40 has a fixing hole 41a for fastening the bolt with the upper supporting structure at regular intervals.

The support adapter 40 which is fastened to the upper portion of the driven support pile 10 is installed on the upper part by performing the adjustment after the horizontal adjustment by the wedge action between the pile guide and the main body if there is a deviation after measuring the horizontality. Ensure the installation stability of the upper support structure.

Figure 4 is a perspective view showing a support pile installed on the bottom of the bottom layer, Figure 5 is a perspective view showing a net support deeply installed below the bottom of the support pile installed on the sea bottom, Figure 6 is a bottom Fig. 7 is a perspective view showing a net closed support of the upper closed type installed on the upper side of the sea bottom in the supporting pile installed, and FIG. 7 shows the support of FIG. 5 and the upper closed type support of FIG. It is a perspective view which shows the state which installed the support adapter.

Hereinafter, the filing operation | work using the net support mechanism of the soft ground support pile of the structure mentioned above with reference to these drawings is demonstrated.

First, the main support pile main body to be press-fitted to the sea bottom of the water (S) to be inserted to a certain depth in the bulge (SB) by the weight of the pile itself, and then using a known helm to drive the head of the support pile Insert the file to the required depth (see Figure 4).

The through hole 21 of the net support 20 according to the present invention having the above-described configuration is inserted into the driven support file 10 and lowered to the position of the support file having a height below the floor SB by its own weight. In the case of the divided type in which the support 20 is divided, after assembling at the desired height position of the support pile 10 and lowering it into the floor SB by its own weight, the through-hole 21 and the support pile 10 are injected. The grout is fixed or swage bonded using hydraulic pressure (see FIG. 5).

At this time, in another embodiment, instead of the net support 20, the upper closed net support 30 is installed in the same manner and lowered to the position of the support pile of the height of the upper side of the flat bottom SB by its own weight. After that, the through hole and the support pile 10 are fixed by using grout injected through the rich rod or swaging by using hydraulic pressure (see FIG. 6).

The net support 20 and the top closed net support 30 can be installed in combination with each other as shown in FIG. 7, and then leveling the support adapter 40 to level the superstructure. By fixing the upper portion of the support pile (10) by using the net support mechanism according to the present invention to complete the piling and adapter installation work.

1 is a perspective view of a net support of the net support mechanism of the support pile for soft ground according to the present invention;

FIG. 2 is a perspective view of a modification in which a circut portion is further formed on the outermost circumference of the net support of FIG. 1,

3 is a perspective view illustrating an embodiment of a configuration in which a closing cover is further installed on the upper portion of the net support of FIG. 1,

4 is a perspective view showing a support pile installed on the bottom of the bottom layer;

5 is a perspective view showing a net support deeply installed below the sea floor in the support pile installed on the sea floor;

FIG. 6 is a perspective view showing an upper closed net type support installed on the bottom of the sea bottom in a support pile installed on the sea bottom;

FIG. 7 is a perspective view illustrating a state in which the support of FIG. 5 and the upper closed support of FIG. 6 are installed together on a support pile and a support adapter is installed on the support pile.

Claims (14)

As a net support mechanism for single support piles for soft ground: A plurality of cylindrical through-holes through which the support piles installed on the soft ground penetrate, a plurality of radial diaphragms extending radially from the through-holes, and a plurality of radially spaced apart in the circumferential direction of the through-holes so as to form a plurality of compartments intersecting the radial diaphragms. At least one net-type support having an outer circumferential plate and fixedly installed at a predetermined height position of the support pile installed on the soft ground; Net support structure for a single support pile for soft ground, characterized in that it comprises a support adapter which is installed on the top of the driving support pile is fixed to support the upper support structure horizontally. The support adapter according to claim 1, wherein the support adapter has an upper open body having an upper portion having an inner circumferential fixing flange to which the upper supporting structure is fixedly installed and a lower portion coupled to an upper portion of the supporting pile so as to communicate with the supporting pile. Net-type support mechanism of single support pile for soft ground characterized in that it is. The net support mechanism of claim 1, wherein the through hole and the support pile are cylindrical, and the through hole is larger than a diameter of the support pile driven through the through hole. According to claim 3, wherein the through-hole and the support piles driven through it is a soft rod characterized in that the adhesive rod for the fixing of each other (reach rod) or the uneven wedge for the swaged joint using hydraulic pressure is installed Net support mechanism for single support pile for the ground. 4. The net support mechanism of claim 3, wherein the through hole and the support pile driven therethrough are welded together. The single support for soft ground according to claim 1, wherein the overall shape of the net support including the plurality of compartments is one of circular, elliptical, polygonal, cross, snow crystal, honeycomb, and combinations thereof. Net type support mechanism for files. The net support mechanism of claim 1, wherein the end portion of at least one of the radial diaphragm and the outer circumferential plate of the net support further includes a skirt portion. The net support mechanism of a single support pile for soft ground according to claim 1, wherein the plurality of partitions constituting the compartment are disposed at a predetermined inclination angle with respect to a vertical axis. The net support mechanism of claim 8, wherein the inclination angle of the partition wall is in the range of 0 ° to 45 °. 2. The net support mechanism of claim 1, wherein the net support is composed of a pair of assembleable halves divided about the through hole. The net support mechanism of claim 1, wherein the net support is disposed at a height position between a soft base upper end and a predetermined depth in the driven support pile. The net support mechanism of claim 1, further comprising a top closed net support comprising a cover for closing the top surface of the net support. The net support mechanism of claim 12, wherein the cover has a plurality of receiving holes. 14. The net support mechanism of claim 13, wherein the upper closed net support is disposed at a height position near the top of the soft base in the driven support pile.

Images