TWI780912B - foundation pile - Google Patents

Abstract

A foundation pile includes a pile pipe, a pile head, a pile tip and a pile core. The pile pipe is integrally formed of corrosion-resistant material, extends vertically along a straight line, and defines a core-filling space around it. The pile head includes an end cap that rests on the top of the pile pipe. The pile tip includes a tapered portion that rests on the bottom end of the pile pipe and tapers downward gradually. The pile core is made of concrete, which is filled into the core filling space and combined with the pile pipe, the pile head and the pile tip. The design of the foundation pile surrounding and covering the pile core by the pile tube can protect the pile core from cracking damage, and further improve the use safety of the foundation pile.

Description

foundation pile

The invention relates to a building engineering material, in particular to a foundation pile suitable for supporting buildings.

Foundation piles are generally suitable for the foundation structure of large or high-rise buildings. They must go deep into the soil or rocks to transfer the load of the building to the soil layer or site to increase the safety and stability of the building. The foundation pile is usually a long column made of concrete, which can be equipped with steel bars. However, it is directly exposed to soil, air, or even water during use without other protection measures. After a period of time, the surface Concrete is susceptible to degradation such as cracking or collapsing due to environmental influences, causing the steel bars to be exposed and corroded, especially when the foundation piles are used in special fields, such as port buildings, offshore platforms, offshore wind power buildings, bridges, farming Pool buildings, or special acid-etched environmental projects... etc., because the concrete of the foundation pile will be corroded or acid-etched by salt, sulfate, acid components, etc., which will affect the reliability, durability and safety of the concrete, resulting in the The reduction of the structural strength of the foundation pile may cause great harm to the use of the building, so the design of the foundation pile still needs to be improved.

Therefore, the object of the present invention is to provide a foundation pile which at least overcomes the disadvantages of the prior art.

Therefore, the foundation pile of the present invention includes a pile pipe, a pile head, a pile tip, and a pile core. The pile pipe is integrally formed of corrosion-resistant material, extends vertically along a straight line, and defines a core-filling space around it. The pile head includes an end cap that rests on the top of the pile pipe. The pile tip includes a tapered portion that rests on the bottom end of the pile pipe and tapers downward gradually. The pile core is made of concrete, which is filled into the core filling space and combined with the pile pipe, the pile head and the pile tip.

The effect of the present invention is that the foundation pile can prevent the pile core from being corroded if the pile tube with corrosion resistance is coated on the periphery of the pile core, so that the use safety can be improved.

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

Referring to FIGS. 1 , 2 and 3 , a first embodiment of the foundation pile of the present invention includes a pile pipe 1 , a pile head 2 , a pile tip 3 , and a pile core 4 .

The pile pipe 1 is a tubular body with a hollow circular cross-section, which extends vertically along a straight line 6 and defines a core-filling space 11 around it, but its cross-sectional shape is not limited thereto. The pile pipe 1 includes a straight pipe portion 12 whose top end leans against the pile head 2, and a bottom expansion portion 13 formed integrally at the bottom of the straight pipe portion 12 and whose bottom end leans against the pile tip 3. The outer diameter width of the expanded portion 13 is larger than the outer diameter width of the straight pipe portion 12 . The pile pipe 1 is integrally formed by corrosion-resistant materials, such as rigid polyvinyl chloride (PVC) plastics, which have excellent acid resistance, alkali resistance and corrosion resistance, are not affected by moisture and soil pH, and have good resistance Combustibility and stability can be used for resource recovery and reuse. Of course, the corrosion-resistant material can also be changed, not limited to this.

The pile head 2 includes an end cap 21 resting on the top of the pile pipe 1, and eight ribs protruding downward from the bottom of the end cap 21 into the core filling space 11 at equal angular intervals. twenty two. The material of the pile head 2 is steel, and the end cover 21 is a circular cover piece corresponding to the pile pipe 1, which can withstand the knocking and hammering of the machine tool. The top ends of the upper ribs 22 are welded to the end The cover part 21 and the bottom end are in the shape of a hook, which can increase the grip area and anchoring force between the pile core 4. Of course, the upper rib parts 22 can also be connected or locked to the end cover part. 21. It is not limited to the first embodiment. It should be noted that the shape and length of the upper rib part 22 can also be changed, and the number is not limited to eight. It can be one, two, or three according to actual needs. , four or more.

The pile tip 3 includes a tapered portion 31 that rests on the bottom end of the pile pipe 1 and gradually tapers downwards, and eight branches protrude upwards from the top surface of the tapered portion 31 at equal angular intervals. Enter the lower rib portion 32 of the core filling space 11. The material of the pile point 3 is steel, and the pointed cone portion 31 is conical, which is easy to drill into the soil layer or the formation. Increase the holding area and anchoring force between the pile core 4. Of course, the lower ribs 32 can also be connected or locked to the pointed cone 31 in the same body, which is not limited to the first embodiment. It should be noted that the shape and length of the lower rib portion 32 can also be changed, and the number is not limited to eight, but can be one, two, three, four or more according to actual needs.

The pile core 4 is cylindrical and made of concrete, which is filled into the core-filling space 11 during manufacture, and combined with the pile pipe 1, the pile head 2 and the pile tip 3, that is, the concrete and the pile tip 3 The inner peripheral surface of the pile pipe 1, the bottom surface of the end cover portion 21, the upper rib portions 22, the top surface of the tapered portion 31, and the lower rib portions 32 are fully bonded together. Of course, the concrete can be adjusted according to the actual required strength to meet the needs of different fields.

Referring to Figures 1 and 4, during manufacture, the pile tube 1, the pile head 2 and the pile tip 3 are first prepared in the factory, and then transported to the construction site and assembled at the construction site, of course, it can also be assembled directly in the factory. Carried to the construction site again, no longer explained here. When assembling, first place the pile head 2 upside down, turn the pile pipe 1 upside down and place it on the pile head 2 in reverse, then fill the core filling space 11 with the concrete, and then place the pile head 3 Reverse cover is placed on the pile tube 1, so that the concrete grips and combines the pile head 2, the pile tube 1 and the pile tip 3, and becomes the pile core 4 after the concrete is hardened, so that the foundation is completed. Pile assembly. When in use, hang the foundation pile upright on a mounting place (not shown), with the pile head 2 on the top and the pile point 3 facing down, and hammer into the mounting place by a machine tool (not shown). Placed in the soil layer or site, it can be positioned by the friction of soil and gravel. Since the pile core 4 is covered by the corrosion-resistant pile pipe 1, the pile core 4 can be protected from corrosion by foreign objects, the structural strength can be ensured, and the support safety can be improved. In addition, since the pile pipe 1 is designed to expand the outer diameter of the bottom expansion part 13, as the pile point 3 penetrates into the soil layer or formation, the bottom expansion part 13 can squeeze the soil and gravel out. Open and lead the straight pipe portion 12 to pass through quickly and smoothly, so as to reduce the frictional obstruction by soil or gravel, so as to facilitate the implantation and installation of the foundation pile.

Referring to Fig. 5, 6, 7, the structure of a second embodiment of the foundation pile of the present invention is roughly the same as that of the first embodiment, and the difference is that the foundation pile also includes a pile pipe 1 arranged along the straight line 6. The steel cage 5 inside can become a supporting skeleton to reinforce the mechanical structure, and the steel cage 5 extends into the core space 11 and is combined with the concrete of the pile core 4, so that the foundation pile structure has concrete compression resistance And the tensile performance of the reinforcement cage 5 can increase strength and safety. The reinforcement cage 5 includes several main bars 51 vertically extending up and down between the end cover portion 21 and the tapered portion 31, and several stirrup bars 52 spaced up and down and connecting the main bars 51 transversely. The reinforcing cage 5 can also include several tie bars (not shown in the figure), and even prestressed tendons, spiral stirrups, or horizontal stirrups can also be selected, which will not be described here. The reinforcement cage 5 of the second embodiment is welded and anchored to the bottom surface of the end cover portion 21. Of course, the reinforcement cage 5 can also be welded to the top surface of the pointed cone portion 31 in practice. In addition, the pile head The described upper rib portion 22 of 2 (see Fig. 1) and the described lower rib portion 32 of the pile tip 3 can also be selected or not provided with, and are not limited to this second embodiment.

Referring to Figures 5 and 8, when assembling, first place the pile head 2 upside down, hang the reinforcement cage 5 on the pile head 2 and carry out welding and anchoring, and then place the pile pipe 1 reversely on the pile head 2. The periphery of the reinforcement cage 5 is placed against the pile head 2, and then the concrete is poured to fill the core space 11, and then the pile head 3 is reversely covered on the pile pipe 1, and the concrete is wrapped Combining the pile head 2, the pile pipe 1, the reinforcement cage 5 and the pile tip 3, the assembly is completed after the concrete is hardened.

Referring to Fig. 9,10, the structure of a third embodiment of foundation pile of the present invention is roughly identical with this first embodiment, and its difference is: the shape of this pile pipe 1 is different, and the cross section of this pile pipe 1 is hollow square, Of course, the shapes of the pile head 2 and the pile point 3 will also change correspondingly. As shown in FIG. . In addition, this third embodiment is also applicable to this second embodiment.

Referring to Fig. 11, the structure of a fourth embodiment of the foundation pile of the present invention is substantially the same as that of the third embodiment, the difference being that the cross section of the pile pipe 1 is hollow hexagonal. Of course, the fourth embodiment is also applicable to the second embodiment.

Referring to Fig. 12, the structure of a fifth embodiment of the foundation pile of the present invention is substantially the same as that of the third embodiment, the difference being that the cross section of the pile pipe 1 is a hollow octagon. Of course, the fifth embodiment is also applicable to the second embodiment.

In summary, the foundation pile of the present invention is designed to completely cover the pile tube 1 on the outer surface of the pile core 4 without affecting the reliability, durability and safety of the concrete. The corrosion resistance of the foundation pile further improves the corrosion resistance of the foundation pile, has good weather resistance and long service life, meets the requirements of existing engineering specifications, and enables the foundation pile to be used in special fields that are prone to corrosion or acid corrosion, such as ports Buildings, offshore platforms, offshore wind power buildings, bridges, culture pond buildings, or special acid-etched environmental engineering... etc., have a wide range of applicability, so the purpose of the present invention can indeed be achieved.

But what is described above is only an embodiment of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

1: pile pipe 11: Filling space 12: Straight pipe part 13: Bottom expansion 2: pile head 21: End cover 22: upper tendon 3: pile tip 31: Tapered part 32: lower tendon 4: pile core 5: steel cage 51: main tendon 52: Stirrup 6: Straight line

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a three-dimensional exploded view, illustrating a state of a first embodiment of the foundation pile of the present invention that has not yet been provided with a pile core; Figure 2 is a fragmentary longitudinal sectional view illustrating the first embodiment; Fig. 3 is a sectional view taken along line III-III in Fig. 2; Figure 4 is a schematic diagram of a manufacturing process illustrating the first embodiment; Fig. 5 is a three-dimensional exploded view, illustrating a second embodiment of the foundation pile of the present invention without setting the state of the pile core; Figure 6 is a fragmentary longitudinal sectional view illustrating the second embodiment; Fig. 7 is a sectional view taken along line VII-VII in Fig. 6; FIG. 8 is a schematic diagram of a manufacturing process illustrating the second embodiment; Fig. 9 is a perspective view illustrating a third embodiment of the foundation pile of the present invention; Fig. 10 is a transverse sectional view illustrating the third embodiment; Fig. 11 is a transverse sectional view illustrating a fourth embodiment of the foundation pile of the present invention; and Fig. 12 is a transverse sectional view illustrating a fifth embodiment of the foundation pile of the present invention.

1: pile pipe

11: Filling space

12: Straight pipe part

13: Bottom expansion

2: pile head

21: End cover

22: upper tendon

3: pile tip

31: Tapered part

32: lower tendon

4: pile core

6: Straight line

Claims (8)

A foundation pile, comprising: a pile pipe integrally formed of corrosion-resistant materials, extending along a straight line and defining a core-filling space around it; a pile head including a top The end cover portion; a pile tip, including a pointed cone part that rests on the bottom end of the pile tube and gradually tapers downwards, and at least one protrudes upwards from the top surface of the pointed cone part into the The lower rib part of the core-filling space; and a pile core, which is made of concrete, is filled into the core-filling space and combined with the pile pipe, the pile head and the pile tip. The foundation pile according to claim 1, wherein the corrosion-resistant material of the pile pipe is polyvinyl chloride (PVC) plastic. The foundation pile as described in claim 2, wherein the material of the pile head and the pile tip are both steel materials. The foundation pile according to claim 1, wherein the pile head further includes at least one upper rib portion protruding downward from the bottom surface of the end cap portion into the core-filling space and gripped and combined with the pile core. The foundation pile according to claim 1, wherein the foundation pile further comprises a reinforcement cage arranged in the pile tube along the straight line, the reinforcement cage extends into the core filling space and is combined with the pile core, The reinforcement cage includes several main reinforcements vertically extending up and down between the end cover part and the pointed cone part, and several stirrups spaced up and down and horizontally connecting the main reinforcements. The foundation pile according to claim 5, wherein the reinforcement cage is welded and anchored to the bottom surface of the end cap. The foundation pile as claimed in claim 1, wherein the pile tube includes a straight pipe portion whose top end rests on the end cover portion, and is integrally formed on the bottom of the straight pipe portion and the bottom end rests on the pointed cone The bottom expansion part of the part, the outer diameter width of the bottom expansion part is larger than the outer diameter width of the straight pipe part. The foundation pile according to claim 1, wherein the cross section of the pile tube is hollow circular, hollow square, hollow hexagonal, or hollow octagonal.

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