KR20090054647A - Bundle type large diameter pile using small diameter pile - Google Patents

Abstract

A bundled large diameter pile structure using a small diameter pile is provided to replace the large diameter pile by assembling plural small diameter piles manufactured in the factory beforehand. A bundled large diameter pile structure using a small diameter pile comprises a bottom fixing member(10) arranged on the support layer of the soft ground, plural small diameter piles(20) contacting with each other with the inside diameter of the bottom pinned wall member of the bottom fixing member, an upper fixing bottom plate, and an upper fixing wall member which is vertically extended downward from the upper fixing bottom plate, and an upper fixing member(30) in which the upper end of a plurality of small caliber piles is inserted.

Description

Multiple large diameter pile structure using small diameter pile {BUNDLE TYPE LARGE DIAMETER PILE USING SMALL DIAMETER PILE}

The present invention relates to a multiple large-diameter pile structure, and more particularly, to a multiple large-diameter pile structure that can be installed in a simple and fast marine large-diameter pile using a plurality of small diameter pile.

In general, the structure is a bridge, or a port structure along the coast of a sea, to be installed in a sea or a river to construct a high-loaded superstructure or a super-large structure or a bridge that passes through the sea. The structure has a lot of difficulties in construction due to the soft layer or soft ground existing in the area where the structure is installed.

In particular, in the case of installing the structure at sea or underwater, not only the difficulty due to underwater work, but also in the case of the offshore bridges, most of the bridges are large-scale heavy bridges with weights of several thousand tons. It is composed.

Accordingly, in the case of structures, the settlement or floating settling of the structure seriously affects the stability of the structure, so that the improvement of the soft ground, as well as the pile supporting the structure, such as large diameter steel pipe piles with a diameter of 800 mm or more, and cast concrete piles, such as large diameter piles It is being constructed.

In the conventional reinforcement method for increasing the bearing capacity of the subsea soft ground, as shown in Figure 1, through the subsea soft ground through the subsea soft ground to the depth of the support layer through a vibro hammer, to excavate the inside of the steel pipe pile, large diameter The RCD is inserted into the steel pipe pile to excavate the lower ground to the rock bed. Then, the reinforcing bar is inserted into the RCD excavation section, the first time the underwater concrete is poured, and the second time the underwater concrete is poured.

However, since the conventional method is to excavate to the support layer of the soft ground and to place concrete at the site, it is difficult to transport various materials to the site as well as need various equipment for concrete mixing and placing at the site. There was a problem that this took a long time.

Accordingly, a method of lifting and assembling the foundation concrete structure manufactured after the foundation concrete structure on land has been proposed.

However, as described above, in the case of a structure such as a large structure or a long bridge, the weight of the foundation concrete structure itself is a large weight, so it is not easy to obtain equipment that can lift the structure of such a weight. There was a lot of inconvenience, such as the problem of transportation to move to.

The present invention is to solve the problems of the prior art described above, to replace a large diameter pile by assembling a plurality of small diameter piles manufactured in the factory, to solve the problem of having to cast concrete directly in the field The purpose.

In addition, the present invention is configured to easily assemble a small diameter pile in a plurality of sites, another object of the conventional large diameter pile is to solve the problems in construction and transportation caused due to the large-scale heavy objects.

In order to achieve the above object, the multiple large-diameter pile structure using the small diameter pile according to the present invention is composed of a lower fixed bottom plate and a lower fixed wall member which extends vertically from the lower fixed bottom plate. A lower fixing member disposed on the support layer, a plurality of small diameter piles inserted into the lower fixing member and tightly constrained by the lower fixing wall member, and vertically downward from the upper fixing bottom plate and the upper fixing bottom plate. Consists of an upper fixing wall member extending in the form, the upper end of the plurality of small diameter piles is characterized in that it comprises an upper fixing member tightly inserted and fixed.

The plurality of small diameter pile is characterized in that the PHC pile provided with a through-hole in the center along the longitudinal direction.

The lower fixed bottom plate and the upper fixed bottom plate is characterized in that it further comprises a plurality of lower fixing projections and a plurality of upper fixing protrusions are formed to protrude from the bottom plate is inserted into the through hole formed in the small diameter pile. .

The lower fixed bottom plate is characterized in that a plurality of holes are formed.

In addition, the large-diameter pile structure according to the present invention comprises a middle fixed floor plate, a first middle fixed wall member extending vertically downwardly from the middle fixed floor plate, and a vertically extending upwardly formed from the middle fixed floor plate. It characterized in that it further comprises an intermediate fixing member having an intermediate fixing wall member.

The intermediate fixed bottom plate has a plurality of through holes corresponding to the through holes, and has a thickness corresponding to the through holes and the through holes and is inserted into the through holes and the through holes and is greater than the plurality of small diameter piles. It is characterized by further comprising a plurality of fixing rod having.

The intermediate fixed bottom plate is characterized in that it further comprises a plurality of intermediate fixed protrusions are formed to protrude vertically vertically inserted into the through-hole formed in the small diameter pile.

The lower fixed bottom plate is characterized in that it is configured to have a size that protrudes further outward from the lower fixed wall member.

According to the present invention having the configuration as described above, by assembling a plurality of small diameter piles pre-fabricated in the factory, it is possible to replace large diameter piles in the past when concrete is directly cast in the field of concrete in the workplace of the site In addition to the need for various equipment for mixing and pouring, there was a difficulty in transporting materials to the workplace, and it can solve the problem of a long construction period.

In addition, according to the present invention by configuring the small diameter pile to be easily assembled at a plurality of sites, it is possible to solve the construction and transportation problems caused by the conventional large diameter pile because of the large-scale weight.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to large diameter pile structure using a small diameter pile according to the present invention.

Figure 2 is a view showing a large diameter pile structure of the present invention, Figure 3 is a lower fixing member according to an embodiment of the present invention, Figure 4 is a small diameter pile, Figure 5 is an upper fixing member, Figure 6 is an intermediate fixing It is a figure which shows a member.

In the present specification, a large diameter pile means a pile having a diameter of at least 800 mm or more, and largely 2000 mm or more, and a small diameter pile means that the diameter is about 300 mm.

As shown in Figures 2 to 6, the large-diameter pile structure 1 according to the present invention, the lower fixing member 10, a plurality of small diameter pile 20 that is inserted and fixed to the lower fixing member, and the small The upper end of the caliber pile is configured to include an upper fixing member 30 is fixed.

The lower fixing member 10 is made of steel or plastic, infiltrates the steel pipe pile 2 to the depth of the support layer of the subsea soft ground, excavates the inside of the steel pipe pile, and excavates to the rock layer, the lower ground of the steel pipe pile tip. Inserted into a pile of steel pipe and disposed above the rock bed.

As shown in FIG. 3, the lower fixing member 10 includes a lower fixing bottom plate 11 and a lower fixing wall member 12. The lower fixed bottom plate 11 is formed in a substantially disk shape in this embodiment, but is not necessarily limited thereto, and may be configured in various shapes such as square and rectangular.

For example, as shown in FIG. 9A, the lower fixing member 10a is formed in a rectangular shape, and six small diameter piles may be arranged in two rows in the lower fixing member 10a having a rectangular shape. . In this configuration, when the structure is to be designed with stems in accordance with the construction conditions, as shown in Figure 9b it can be installed long according to the shape of the structure.

Near the edge of the lower fixed bottom plate 11, the lower fixed wall member 12 extends vertically upward along the longitudinal direction of the pile. Accordingly, the lower fixed wall member 12 is formed in a hollow cylindrical shape, and accommodates and constrains a plurality of small diameter piles to be described later.

In addition, the lower fixed bottom plate 11 is provided with a plurality of holes 14. Infiltrate the steel pipe pile to the depth of the support layer of the seabed soft ground, excavate the inside of the steel pipe pile, and insert the steel pipe pile into the steel pipe pile which is excavated to the rock layer, the lower ground of the steel pipe pile tip, and lay the ground improvement or the rock layer flat when placed on the rock layer. In order to fill the cement paste 3, the lower fixing bottom plate 11 is placed on the filled cement paste so that the cement paste 3 or sand filled through the holes 14 can be accommodated. The bottom plate 11 can be prevented from tilting.

The lower fixing bottom plate 11 has a plurality of lower fixing protrusions 13 protruding upward from the bottom plate in the longitudinal direction of the pile. The plurality of lower fixing protrusions 13 are inserted into the through holes formed in the small diameter piles to be described later to fix the positions of the plurality of small diameter piles. The plurality of lower fixing protrusions 13 is formed to have a diameter approximately similar to the diameter of the through hole.

In addition, the lower fixed bottom plate 11 is configured to have a protruding length (d) further protruding in the circumferential direction from the lower fixed wall member 12. The bearing capacity of the pile is composed of the frictional force along the longitudinal direction of the pile and the tip support of the pile, it is preferable to increase the cross-sectional area of the tip of the pile to increase the tip bearing force of the pile, accordingly the lower fixed bottom plate (11) It is configured to further protrude in the circumferential direction.

On the other hand, as shown in Figure 5, the upper fixing member 30 is composed of an upper fixing bottom plate 31 and the upper fixing wall member 32. The upper fixed bottom plate 31 is formed in a substantially disk shape in this embodiment, but is not necessarily limited thereto, and may be configured in various shapes such as square and rectangular.

For example, as illustrated in FIG. 9A, the upper fixing member 30a is formed in a rectangular shape, and six small diameter piles may be arranged in two rows in the upper fixing member 30a having a rectangular shape. . In this configuration, when the structure is to be designed with stems in accordance with the construction conditions, as shown in Figure 9b it can be installed long according to the shape of the structure.

Near the edge of the edge of the upper fixing bottom plate 31, the upper fixing wall member 32 is formed vertically extending downward along the longitudinal direction of the pile. Accordingly, the upper fixed wall member 32 is formed in a hollow cylindrical shape, and accommodates and constrains a plurality of small diameter piles to be described later.

The upper fixing bottom plate 31 has a plurality of upper fixing protrusions 33 protruding downward from the bottom plate in the longitudinal direction of the pile. The plurality of upper fixing protrusions 33 are inserted into a through hole formed in the small diameter pile to be described later to fix the positions of the plurality of small diameter piles. The plurality of upper fixing protrusions 33 are formed to have a diameter approximately similar to the diameter of the through hole.

A plurality of small diameter piles 20 are inserted into the lower fixing member 10 and the upper fixing member 30. As shown in Fig. 2, the plurality of small diameter piles are tightly inserted adjacent to the inner diameter of the lower fixing wall member 12 of the lower fixing member. For example, six small-diameter piles of approximately 300 mm in diameter are tightly inserted into the lower fixed wall member having an inner diameter of approximately 800 mm.

Although the plurality of small-diameter piles 20 uses PHC piles as an example in the present embodiment, the plurality of small diameter piles 20 may be configured as reinforced concrete piles or steel pipe piles.

As shown in FIGS. 4A and 4B, the plurality of small-diameter piles 20 are provided with a PS steel wire 22 along the circumferential direction, and a through hole 21 is provided in the center along the longitudinal direction. In addition, the upper and lower front end of the small diameter pile is provided with a reinforcing band 23, the reinforcing band 23 may be further provided with a reinforcing plate 24 coupled by bolting or welding.

The construction of the large diameter pile structure of the present invention having the configuration as described above will be described. First, the steel pipe pile is introduced into the depth of the supporting layer of the subsea soft ground by vibro hammer on the ship's driving vessel, and the inside of the steel pipe pile is excavated. Then, the lower fixing member is inserted into the steel pipe pile which is excavated to the rock foundation, which is the lower ground of the steel pipe pile tip. At this time, when it is inserted and placed on the rock layer, cement paste or sand is filled to improve the ground or the rock layer, and the lower fixed bottom plate 11 is placed on the filled cement paste or sand. Since the cement paste or sand filled through the yoke 14 can be accommodated, the lower fixed bottom plate 11 can be prevented from tilting.

Then, the plurality of small diameter piles are sequentially inserted into the lower fixing member. At this time, the through hole 21 of the plurality of small diameter piles is inserted into the lower fixing protrusion 13 provided in the lower fixing bottom plate 11.

Then, align the position of the upper fixing projection of the upper fixing member to the position of the through hole 21 of the plurality of small diameter piles, and the upper fixing member to insert the plurality of small diameter piles into the upper fixing member. Cover.

Then, the construction of the large diameter pile structure is completed by removing the steel pipe pile.

On the other hand, depending on the conditions in which the large-diameter pile structure is installed, there is a case where a plurality of the small-diameter piles must be installed in the longitudinal direction. In this case, an intermediate fixing member is provided between the plurality of small diameter piles connected in the longitudinal direction.

As shown in FIG. 6, the intermediate fixing member 40 is composed of an intermediate fixing bottom plate 41 and intermediate fixing wall members 42a and 42b. The intermediate fixed bottom plate 41 is configured in a substantially disk shape in this embodiment, but is not necessarily limited thereto, and may be configured in various shapes such as square and rectangular.

For example, the intermediate fixing member may be formed in a rectangular shape, and six intermediate diameter piles may be arranged in two rows in the intermediate fixing member having a rectangular shape. By configuring in this way, if the structure is to be designed with stems in accordance with the conditions of construction, it can be installed long according to the shape of the structure.

Near the edge of the middle fixed bottom plate 41, the first middle fixed wall member 42a extending vertically downwardly from the middle fixed bottom plate along the longitudinal direction of the pile, and upwardly from the middle fixed bottom plate. It is composed of a second intermediate fixed wall member 42b extending vertically to receive and restrain the plurality of small diameter piles.

The intermediate fixing bottom plate 41 has a plurality of intermediate fixing protrusions 43 protruding from the bottom plate in the longitudinal direction of the pile in both directions. The plurality of intermediate fixing protrusions 43 are inserted into the through holes formed in the small diameter piles to fix the positions of the plurality of small diameter piles. The plurality of intermediate fixing protrusions 43 are formed to have a diameter approximately similar to the diameter of the through hole.

On the other hand, in place of the intermediate fixing projections 43, may be composed of a plurality of fixing rods (45). That is, the intermediate fixed bottom plate has a plurality of through holes 44 corresponding to the through holes, and has a thickness corresponding to the through holes and the through holes, and is inserted into the through holes and the through holes, and the plurality of small diameters. It can be comprised by the several fixed rod 45 which has a length larger than a pile.

The construction of the large diameter pile structure according to another embodiment of the present invention having the configuration as described above will be described. Inserting the steel pipe pile, excavating the inside of the steel pipe pile, inserting the lower fixing member, and inserting a plurality of small diameter piles into the lower fixing member is the same as the above-described embodiment.

Then, in accordance with the position of the through hole of the plurality of small diameter piles, after adjusting the position of the intermediate fixing protrusion protruding toward the first intermediate fixed wall member 42a, the plurality of small diameter piles on the intermediate fixing member Cover the intermediate fixing member to be inserted.

Then, in accordance with the position of the intermediate fixing protrusion protruding toward the second intermediate fixed wall member 42b, the position of the through holes of the plurality of small diameter piles in the next stage is adjusted, and the plurality of small diameter piles are closed in sequence. Insert it. Then, the upper fixing member is installed in the same manner as in the above-described embodiment.

At this time, when constructing a fixed rod in place of the intermediate fixing projection, the position of the through holes of the plurality of small diameter piles in the through holes, and then insert the fixed rods into the through holes and through holes, The plurality of small-diameter piles of the next stage are arranged on the fixing rods protruding from the fixed bottom plate by positioning the through holes of the plurality of small-diameter piles of the next stage.

Thereby, a plurality of small diameter piles can be assembled in multiple stages along the longitudinal direction.

Small-diameter piles are made of the same material, but the static load is less, so it is possible to use them with a small amount of money and time. However, when using a large diameter pile using a plurality of small diameter piles according to the present invention it can facilitate a test to check the bearing capacity through each test.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings attached to this specification clearly show some of the technical ideas included in the present invention, and modifications that can be easily inferred by those skilled in the art within the scope of the technical ideas included in the specification and drawings of the present invention. It is obvious that both and specific embodiments are included in the scope of the technical idea of the present invention.

1 is a view showing a method for constructing a marine large diameter pile according to the prior art.

2 is a view showing a marine large diameter pile structure according to the present invention, Figure 2a is a perspective view, Figure 2b is a sectional view thereof.

 3 is a view showing a lower fixing member according to an embodiment of the present invention.

4 is a view showing a small diameter pile according to an embodiment of the present invention, Figure 4a is a perspective view, Figure 4b is a sectional view thereof.

5 is a view showing an upper fixing member according to an embodiment of the present invention.

6 is a view showing an intermediate fixing member of the present invention.

7 is a view showing the construction of the marine large diameter pile structure according to the present invention.

8 is another view showing the construction of the marine large diameter pile structure according to the present invention.

9A and 9B illustrate another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

1: offshore large diameter pile structure

2: steel pipe pile

3: Filling member

10: lower fixing member 11: lower fixing bottom plate

12: lower fixing wall member 13: lower fixing protrusion

14 holes

20: small diameter pile 21: through hole

22: PS steel wire 23: lower shoe plate

24: reinforcement plate

30: upper fixing member 31: upper fixing bottom plate

32: upper fixing wall member 33: upper fixing protrusion

40: middle fixing member 41: middle fixing bottom plate

42a: first intermediate fixed wall member 42b: second intermediate fixed wall member

43: middle fixing protrusion 44: through hole

45: fixed rod

Claims (10)

In the pile structure, A lower fixing member comprising a lower fixing bottom plate and a lower fixing wall member extending vertically from the lower fixing bottom plate and disposed on a support layer of the soft ground; A plurality of small diameter piles having a lower end inserted into the lower fixing member and tightly constrained by the lower fixing wall member; Consists of an upper fixed bottom plate and an upper fixed wall member extending vertically downward from the upper fixed bottom plate, the upper end members of the plurality of small diameter piles are tightly inserted and fixed. Large-diameter pile structure using small-diameter piles. According to claim 1, wherein the plurality of small diameter pile multiple large diameter pile structure using a small diameter pile, characterized in that the PHC pile is provided with a hole in the center along the longitudinal direction. According to claim 2, The lower fixed bottom plate and the upper fixed bottom plate, each of the plurality of lower fixing projections and the plurality of upper fixing projections protruding from the bottom plate is inserted into the through hole formed in the small diameter pile Multiple large diameter pile structure using a small diameter pile, characterized in that further comprises. The multiple large diameter pile structure using a small diameter pile according to claim 1, wherein a plurality of holes are formed in the lower fixed bottom plate. The method according to claim 1 or 2, An intermediate fixing member having an intermediate fixed bottom plate, a first intermediate fixed wall member extending vertically downwardly from the intermediate fixed bottom plate, and a second intermediate fixed wall member extending vertically upwardly from the intermediate fixed bottom plate Multiple large diameter pile structure using a small diameter pile, characterized in that further comprising. The method of claim 5, wherein The intermediate fixed bottom plate is formed with a plurality of through holes corresponding to the through hole, The multiple type using a small diameter pile having a thickness corresponding to the through hole and the through hole further includes a plurality of fixing rods inserted into the through hole and the through hole and having a length greater than that of the plurality of small diameter piles. Large diameter pile structures. The method of claim 5, wherein the intermediate fixed bottom plate protrudes vertically vertically multiple large diameter using a small diameter pile characterized in that it further comprises a plurality of intermediate fixed protrusions inserted into the through-hole formed in the small diameter pile Pile structure. The method of claim 1, The lower fixed bottom plate is a multiple large diameter pile structure using a small diameter pile, characterized in that configured to have a size further protrudes outward from the lower fixed wall member. According to claim 3 or 4, wherein the lower fixing member and the upper fixing member is composed of a square or rectangular, the pile structure is characterized in that used as stem stems are installed differently depending on the shape of the structure Multiple large diameter pile structure using small diameter pile. According to claim 5, The intermediate fixing member is composed of a square or rectangular, the pile structure is a large diameter pile structure using a small diameter pile, characterized in that used as stem stems are installed long according to the shape of the structure.

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