TWI625448B - Centrifugal pre-tensioned prestressed concrete foundation with anti-corrosion function - Google Patents

Abstract

A centrifugal pre-tensioned pre-stressed concrete pile device with anti-corrosion function, comprising a part of a first pre-stressed pile unit inserted under the ground and extending in the longitudinal direction, a longitudinal extension and located at the first pre-stressed pile a second pre-stressed pile unit above the unit, an engagement unit located between the first pre-stressed pile unit and the second pre-loaded pile unit and exposed on the ground, and a sacrificial unit disposed on the joint unit and sacrificed The anode principle prevents the joint unit from rusting the corrosion resistant unit. The joint unit includes a first end plate disposed at a top end of the first pre-stressed pile unit, and a second end plate disposed at a bottom end of the second pre-stressed pile unit and contacting the first end plate. The anti-corrosion unit protects the joint unit from corrosion by the sacrificial anode principle, and is easy to install and maintain.

Description

Centrifugal pre-tensioned prestressed concrete foundation with anti-corrosion function Pile device

The invention relates to a pre-stressed concrete pile, in particular to a centrifugal pre-tensioned pre-stressed concrete pile device with anti-corrosion function.

Centrifugal pre-tensioned concrete foundation piles, referred to as pre-stressed foundation piles, can be used as the lower structure of large or important buildings to transfer the building's load to the soil carrier layer or the harder ground to increase the building. The safety and stability of the structure. The pre-stressed pile has the advantages of high strength, high stability, high durability, and rapid construction. The pre-stressed piles are generally hollow tubular and are prefabricated in the factory and transported to the site for construction to the depth of the soil design. In the use of pre-stressed piles, due to the limitation of the length of the factory mold and the length limit of the transport vehicle, the single member of the pre-stressed pile has a length limit, generally about 8 to 18 meters in length. . In engineering use, the pre-stressed pile as a stable substructure supports the bulk of the superstructure load and needs to be placed deep into the soil layer to provide sufficient foundation bearing capacity. In the case where the length of the single member of the pre-stressed pile is limited, the pre-stressed pile often uses the method of connecting piles to extend the length of the pre-stressed pile as a whole to meet the requirements for the depth of the soil layer. Common pile types It is rare for two piles to be piled, followed by three piles and four piles.

Referring to FIG. 1 , a conventional pre-stressed pile 1 includes a surrounding wall 11 surrounding an axially extending space 110 and two end plates 12 respectively disposed on opposite axial sides of the surrounding wall 11 , and The pre-stress members 13 of the surrounding wall 11 and the end plates 12 are axially penetrated. The surrounding wall 11 is concrete. The end plates 12 are made of steel and are provided with a plurality of fitting holes 121. The pre-stress members 13 are steel wires or profiled steel bars, and the two ends are respectively embedded in the fitting holes 121 of the end plates 12.

Referring to FIG. 2, when the two pre-stressed piles 1 are connected to the two sections, the pre-stressed piles 1 are first stacked in the axial direction, so that the upper end of the pre-stressed pile 1 is at the bottom end. 12 is abutted against the end plate 12 at the top of the pre-stressed pile 1, and the corresponding end plates 12 of the two pre-stressed piles 1 are welded and joined. Since the welded joints are exposed to the external environment after the pre-stressed piles 1 are installed, the welded joints and the corresponding end plates 12 are prone to rust after a period of use.

The general rust prevention method is to apply a layer of epoxy resin coating along the welding surface to prevent rust. However, since the pre-stressed piles 1 are large in size, large machines are required to be moved, so coating and maintenance operations are not easy and The cost is high, and in addition, the rust-proof layer has a problem that it is easy to lose protection due to peeling.

Accordingly, it is an object of the present invention to provide a centrifugal pre-tensioned pre-stressed concrete pile device that does not require the application of an anti-corrosion layer and has an anti-corrosion function.

Therefore, the centrifugal pre-tensioned pre-stressed concrete pile device having the anti-corrosion function comprises a part of the first pre-stressed pile unit inserted under the ground and extending in the longitudinal direction, a longitudinal extension and located in the first pre-pre a second pre-stressed pile unit above the force-based pile unit, an engagement unit located between the first pre-stressed pile unit and the second pre-loaded pile unit and exposed on the ground, and a joint unit disposed at the joint unit An anti-corrosion unit that prevents corrosion of the joint unit by sacrificing the anode principle. The joint unit includes a first end plate disposed at a top end of the first pre-stressed pile unit, and a second end plate disposed at a bottom end of the second pre-stressed pile unit and contacting the first end plate. The first end plate and the second end plate are joined and fixed by welding.

The effect of the invention is that in the case of rusting, the highly active corrosion-resistant unit will be rusted by itself, thereby protecting the first end plate, the second end plate and the welded joint of the joint unit from corrosion, and installing and Maintenance is easy, and there is no doubt that it will lose its protective effect due to easy peeling.

21‧‧‧First pre-stressed pile unit

22‧‧‧Second pre-stressed pile unit

23‧‧‧Joining unit

231‧‧‧ first end plate

232‧‧‧second end plate

233‧‧‧ joints

24‧‧‧Anti-corrosion unit

241‧‧‧Sacrificial anode metal parts

242‧‧‧Connecting parts

3‧‧‧Metal bolts

4‧‧‧Metal bolts

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a partial side cross-sectional view showing a conventional pre-stressed pile; Figure 2 is a side view FIG. 3 is a side cross-sectional view showing a first embodiment of a centrifugal pre-tensioned pre-stressed concrete pile device having an anti-corrosion function according to the present invention; FIG. 4 is a partial side cross-sectional view, a supplementary description of FIG. 3; FIG. 5 is a top cross-sectional view, assistance to explain FIG. 3; Figure 6 is a side cross-sectional view showing the first pre-stressed pile unit in a bottom end of the first embodiment; Figure 7 is a partial side cross-sectional view showing the anti-corrosion function of the present invention The second embodiment of the pre-tensioned pre-stressed concrete pile device of the centrifugal method; FIG. 8 is a top view, and FIG. 7 is a supplementary view; FIG. 9 is a partial side cross-sectional view showing the centrifugal method of the present invention having the anti-corrosion function A third embodiment of a pre-stressed concrete pile device; and FIG. 10 is a top view, and FIG. 9 is additionally explained.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 3 and FIG. 4, a first embodiment of a centrifugal pre-tensioned pre-stressed concrete pile device having an anti-corrosion function according to the present invention comprises a part of a first pre-stressed pile unit inserted under the ground and extending in the longitudinal direction. 21 . A second pre-loaded pile unit 22 extending longitudinally and located above the first pre-stressed pile unit 21 , between the first pre-stressed pile unit 21 and the second pre-loaded pile unit 22 . The joint unit 23 and an anti-corrosion unit 24 disposed on the joint unit 23. The joint unit 23 includes a first end plate 231 disposed at a top end of the first pre-loaded pile unit 21, and a bottom end of the second pre-loaded pile unit 22 and abutting against the first end plate 231. The second end plate 232, the first end plate 231 and the second end plate 232 are welded and fixed by a welding rod to form a joint 233, and the joint 233 is 5 meters or more above the ground.

Referring to FIG. 4 and FIG. 5 , the anti-corrosion unit 24 includes three joints 233 that are attached to the joint unit 23 and are fixed to the joint unit 23 . Sacrificial anode metal member 241 on the two end plates 232. The sacrificial anode metal members 241 are curved in an arc shape and are disposed around the joint unit 23 as shown in FIG. In this embodiment, the first pre-stressed pile unit 21 and the second pre-stressed pile unit 22 are hollow pre-stressed piles having an outer diameter of 600 mm and an inner diameter of 400 mm. The first end plate 231 and the second end plate 232 are both steel plates having a thickness of 22 mm. Each of the sacrificial anode metal members 241 is a zinc plate having a width of 100 mm and a thickness of 40 mm. Each of the sacrificial anode metal members 241 is fixed to the second end plate 232 by two metal bolts 3 having a diameter of 12 mm.

The invention can be placed at the beach and partially exposed to the salt-rich air. Since the potential activity of the sacrificial anode metal members 241 is higher than that of the first end plate 231, the second end plate 232, and the joint 233, the sacrificial anode metal members 241 will take precedence over the first end plate. 231. The second end plate 232 and the welding material of the joint 233 are rusted, thereby achieving the effect of protecting the joint unit 23 from corrosion. Since the sacrificial anode metal members 241 are exposed to the air, the maintenance personnel can view the sacrificial anode metal members 241 by visual or telescopic means to confirm whether the anti-rust measures are continuously effective. According to the foregoing configuration and specifications, the anti-rust time of the sacrificial anode metal members 241 can be about 10 to 15 years, and the thickness or the number of the sacrificial anode metal members 241 can be increased as required to prolong the anti-rust time. When the sacrificial anode metal member 241 is exhausted and cannot be rustproof, the sacrificial anode metal member 241 can be detached and replaced.

It should be noted that, in the first embodiment, the bottom end of the first pre-stressed pile unit 21 is set as shown in FIG. 3, but may also be as shown in FIG. Buried setup, and can be placed at the bottom A steel plate is added to take up the pile with another pre-stressed pile (not shown). The sacrificial anode metal members 241 of the anti-corrosion unit 24 may be fixed to the first end plate 231 of the joint unit 23 by a plurality of metal bolts 3. The material of the sacrificial anode metal members 241 may be aluminum, magnesium or zinc. , or its alloy, is not limited to this.

Referring to FIG. 7 and FIG. 8 , a second embodiment of a centrifugal pre-tensioned pre-stressed concrete pile device having an anti-corrosion function according to the present invention is different from the first embodiment in that the anti-corrosion unit 24 includes two The sacrificial anode metal piece 241 is symmetrically disposed, and the plurality of connecting pieces 242 of the sacrificial anode metal piece 241 and the joint unit 23 are respectively connected. The connectors 242 are metal connecting bars. Each of the sacrificial anode metal members 241 is joined to one end of the two connecting members 242 by welding, and the other ends of the two connecting members 242 are respectively welded and the first end plate 231 as shown in FIG. The second end plate 232 is joined, and when the sacrificial anode metal members 241 are exhausted, they can be detached and replaced by means of desoldering or the like. By this arrangement, the sacrificial anode metal members 241 can be disposed away from the joint unit 23, providing another configuration choice. It should be further noted that each of the sacrificial anode metal members 241 is 200 mm long, 100 mm wide, and 60 mm thick. One end of the connecting member 242 connected to the engaging unit 23 may also be coupled only to one of the first end plate 231 and the second end plate 232. The connecting member 242 can also be a metal cable, a metal plate or a metal tube, and is not limited thereto.

Referring to FIG. 9 and FIG. 10, a third embodiment of a centrifugal pre-tensioned pre-stressed concrete pile device having an anti-corrosion function according to the present invention is different from the second embodiment in that each connecting member 242 is a steel plate. And is shown in Figure 9. One end is welded to the first end plate 231, and the other end is a corresponding sacrificial anode metal piece 241. Each sacrificial anode metal piece 241 is locked by two 14 mm metal bolts 4. Fastened to the corresponding connector 242. It should be further noted that the connectors 242 may also be connected to the second end plate 232.

In summary, when the rust phenomenon occurs, the corrosion-resistant unit 24 with higher activity will be rusted by itself, thereby protecting the first end plate 231, the second end plate 232 and the welded joint 233 of the joint unit 23 from corrosion. It is easy to install and maintain, and there is no doubt that the protection effect is lost due to easy peeling. In addition, the number and thickness of the sacrificial anode metal piece 241 or the distance from the joint unit 23 may be adjusted according to requirements. It is universal, so it can achieve the object of the present invention.

However, the above is only the embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and the patent specification of the present invention are still It is within the scope of the patent of the present invention.

Claims (6)

A centrifugal pre-tensioned pre-stressed concrete pile device with anti-corrosion function comprises: a first pre-stressed pile unit, partially inserted under the ground and extending in the longitudinal direction; and a second pre-stressed pile unit, along the longitudinal direction An extension unit is disposed above the first pre-stressed pile unit; an engagement unit is disposed between the first pre-stressed pile unit and the second pre-loaded pile unit and exposed to the ground, and includes a first pre-force a first end plate at a top end of the pile unit, and a second end plate disposed at a bottom end of the second pre-stressed pile unit and contacting the first end plate, wherein the first end plate and the second end plate are Welding joint bonding; and an anti-corrosion unit disposed on the joint unit and preventing corrosion of the joint unit by a sacrificial anode principle, the corrosion resisting unit comprising a plurality of sacrificial anode metal members disposed around the joint unit at intervals, and plural The sacrificial anode metal members and the connecting members of the joint unit are respectively connected, and the sacrificial anode metal members are detachably disposed on the connecting members. The centrifugal pre-tensioned pre-stressed concrete pile device having the anti-corrosion function according to claim 1, wherein the material of the sacrificial anode metal members is selected from the group consisting of aluminum, magnesium, zinc, and alloys thereof. A centrifugal pre-tensioned pre-stressed concrete pile device having an anti-corrosion function according to claim 1, wherein one end of each connecting member is connected to one of the first end plate and the second end plate of the joint unit. . A centrifugal pre-tensioned pre-stressed concrete pile device having an anti-corrosion function according to claim 1, wherein each of the sacrificial anode metal members is detachably connected to one end of two of the connecting members, and the two connections are The other end of the piece is connected to the first end plate and the second end plate of the joint unit, respectively. The centrifugal pre-tensioned pre-stressed concrete pile device having the anti-corrosion function according to claim 3 or 4, wherein the connecting members are selected from the group consisting of a metal pipe, a metal bar, a metal plate, and a metal cable. The centrifugal pre-tensioned pre-stressed concrete pile device having the anti-corrosion function according to claim 3, wherein the connecting members are steel plates.