KR20100124165A - Shoe for phc pile - Google Patents
Shoe for phc pile Download PDFInfo
- Publication number
- KR20100124165A KR20100124165A KR1020090043276A KR20090043276A KR20100124165A KR 20100124165 A KR20100124165 A KR 20100124165A KR 1020090043276 A KR1020090043276 A KR 1020090043276A KR 20090043276 A KR20090043276 A KR 20090043276A KR 20100124165 A KR20100124165 A KR 20100124165A
- Authority
- KR
- South Korea
- Prior art keywords
- phc pile
- pile
- phc
- shoe
- ground
- Prior art date
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/58—Prestressed concrete piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/72—Pile shoes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/16—Shapes
- E02D2200/1692—Shapes conical or convex
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Description
The present invention relates to a shoe (Shoe) attached to the lower end of the PHC pile that is driven on the soft ground, and attaches the shoe to the lower end of the PHC pile being driven, the underground obstacle to the radially outer side of the PHC pile when the PHC pile is driven The present invention relates to a shoe for driving PHC piles that can improve driving stability of the PHC pile by reducing the running pressure by reducing the running resistance by improving the running stability of the PHC pile.
Generally, soft ground is a case in which the ground itself cannot tolerate the load from the upper structure or the predicted settlement exceeds the allowable value. Soft ground, loose sandy soil, organic soil, etc. belong to the soft clay, If roads, bridges, buildings, etc. are placed on the ground composed of organic soil, the sedimentation of shear surface is excessive, and there is a lack of support, causing safety problems. Recently, garbage has become an important environmental problem. Plans are also being made to use the ground as a basis for roads and buildings, and excessive ground subsidence and lack of support are expected in such grounds.
Among the countermeasures for the stability and settlement problems of structures based on such soft ground, the method of reaching the fill layer, which is commonly used, is the steel pipe pile, PHC pile, and PC pile RC, which are produced in advance at the factory. The pile is constructed by a method such as a type method (hit, vibration) or a buried method, and the pile is continuously blown after the blow according to the condition of the ground, and after being hit properly, the pile is projected to the upper part of the plan ground. Is appropriately cut, the bottom reinforcing bar in the horizontal direction on top, and the foundation concrete is poured to stably support the structure (building) by the piled and poured concrete.
There are two types of piles for driving: steel piles and concrete piles (hereinafter referred to as 'PHC piles'). Prestressed Spun High Strength Concrete Piles are provided. There are general concrete piles made by pouring concrete, high-strength piles and cylindrical steel piles which are placed inside the tension muscle called Ulbon, poured concrete, and forcedly tensioned to introduce stress and rapidly cure under stress conditions.
Recently, high strength piles are used which are much higher than ordinary concrete piles, and ordinary concrete piles are gradually being used except for lightweight construction.
In order to navigate the pile as described above in the ground, driving equipment such as a drop hammer, a steam hammer, a diesel pile hammer and a vibration pile driver are used, and the pile hitting the ground first by the driving equipment is a solid ground. If it does not reach by, connect another file on the embedded file and construct it.
At this time, the upper pile connected to the lower pile is flat so that the two piles are connected to the surface contact so that the driving pressure of the driving equipment is evenly transmitted to the lower pile.
Such a structure of the conventional file is registered utility model No. 20-0224734 "reinforcement band for concrete files" (registration date: March 09, 2001), registered utility model No. 20-0277683 "connection structure of the soft ground reinforcement file "(Registration date: 05/27/2002)," Joint cap of PA file, "registered utility model No. 258871, and JP 10-0687471," Bolt type joint shoe of PA file "(Registration date: 2007. 02.21). When looking at the file (Pile) published in the prior document as described above, it is characterized by a simple connection structure for linking two files at the top and bottom of the file.
On the other hand, since the contact surface of the steel pipe is very narrow in connecting the two piles, the method of integrating the diameter of the lower pile and the diameter of the upper pile by welding the connected portion is common.
However, when the PHC pile driven by the above-mentioned navigation equipment encounters obstacles such as rocks or rubble buried in the ground in the process of being placed into the ground, the pile does not get stuck well in the ground despite the impact of the navigation equipment.
As a result, the driving equipment for longer periods of time and the PHC pile must be priced with a stronger force, which increases the operating cost of the machinery and causes air delays.
The present invention has been invented to compensate for the problems caused by the conventional piloting operation as described above, an object of the present invention is to obstacles encountered at the lower end of the PHC pile when placing the PHC pile in the ground by the impact of the driving equipment. It is to provide a shoe for the driving PHC pile that can be easily overcome and allow the PHC pile to proceed underground.
The problem of shoe for PHC pile in accordance with the object of the present invention,
In the PHC pile driven under the ground by the driving equipment,
A lowering force and running resistance of the PHC pile being driven, guides the vehicle to stably run in the driving direction of the PHC pile, and attaches means for attaching a shoe body having a funnel shape attached to the lower end of the PHC pile to the lower end of the PHC pile. It can be implemented by providing.
The shoe according to the present invention pushes various obstacles (building waste or rocks and others) buried or buried in the ground by funnel-shaped inclined surfaces when the PHC pile is poured into the ground by the driving equipment to the radially outer side of the PHC pile. Since the traveling, the running stability of the pile can be improved, and the mobility of the PHC pile is improved by lowering the ground pressure per unit area acting on the PHC pile.
Therefore, the running speed of the PHC pile is fast, the energy cost according to the operation of the driving equipment can be reduced, and the air according to construction can be shortened.
Hereinafter, with reference to the accompanying drawings for the PHC pile shoe according to the present invention will be described in detail.
1 is a sectional view of the main part of a shoe for a PHC pile illustrating the first embodiment according to the present invention, Figure 1b is a sectional view of the main part showing a construction example according to the shoe for a PHC pile of the present invention, Figure 2a is a An exploded perspective view illustrating a shoe for a PHC pile illustrating a second embodiment according to the present invention, and FIG. 2B is a bottom view of the shoe for the PHC pile shown in FIG. 2A, and FIGS. 3A and 3B are a third embodiment according to the present invention. It is a principal part perspective view which showed the shoe for PHC piles which illustrated the example, and the principal part sectional drawing by the construction of a pile.
As shown in Figures 1a to 2b, the
The
As an example of employing the attachment means 13, as shown in Figs. 1A and 1B, the joints are welded so as to connect the upper surface of the shoe to the reinforcement plate 3 (provided in manufacturing the PHC pile) of the PHC pile, or to Figs. 2A and 2B. As shown, the through hole parallel to the axis of the
The outer diameter of the connecting
As described above, when the
That is, the obstacle is pushed outward in the radial direction of the
Therefore, the length of the
On the other hand, while the
3A and 3B illustrate a shoe structure that is supplemented such that the ground retracting force applied to the circumferential surface of the PHC file does not increase even if the depth of the PHC file in which the PHC file is driven into the ground increases.
That is, as shown in the figure, by configuring the outer diameter (D2) of the connecting plate (13a) larger than the outer diameter (D1) of the PHC pile (1b), the grounding resistance of the PHC pile running only acts on the edge of the connecting plate, It does not work on the circumferential surface of the PHC pile.
In other words, since the outer diameter D2 of the connecting
Therefore, the grounding force of the
As described above, in the present invention, the PHC pile is placed into the ground using the driving device. By attaching a shoe to the lower end of the PHC pile, the PHC pile is driven while the inclined surface of the funnel shape pushes the obstacle radially outward of the PHC pile. Therefore, the ground pressure of the PHC pile per unit area is reduced, which improves the mobility of the pile.
Figure 1a is a perspective view of the main portion excerpts illustrating the shoe for the PHTA pile exemplifying the first embodiment according to the present invention,
1B is a sectional view showing the main parts of a construction example of the shoe for PHC pile shown in FIG. 1A;
Figure 2a is a perspective view of the main portion excerpts illustrating the shoe for the PHTA pile exemplifying a second embodiment according to the present invention,
Figure 2b is a bottom view of the shoe for driving PHC pile shown in Figure 1a
Figure 3a is a perspective view of the main portion excerpts illustrating an application example of the shoe for PHC pile exemplifying a third embodiment according to the present invention,
FIG. 3B is a sectional view showing the principal parts of an example of attachment and construction of the shoe for the PHC pile shown in FIG. 3A. FIG.
<Description of the symbols for the main parts of the drawings>
1b: PHC file
2: screw hole 3: gusset
10: Shoo 11: Shoo body
12: inclined surface 13: attachment means
13a: connecting plate 14: welded part (welding bead)
16: through hole 17: bolt
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020090043276A KR20100124165A (en) | 2009-05-18 | 2009-05-18 | Shoe for phc pile |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020090043276A KR20100124165A (en) | 2009-05-18 | 2009-05-18 | Shoe for phc pile |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20100124165A true KR20100124165A (en) | 2010-11-26 |
Family
ID=43408512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020090043276A KR20100124165A (en) | 2009-05-18 | 2009-05-18 | Shoe for phc pile |
Country Status (1)
Country | Link |
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KR (1) | KR20100124165A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101253051B1 (en) * | 2012-09-05 | 2013-04-10 | 주식회사 에이스올 | Arching pile |
CN104947664A (en) * | 2015-06-30 | 2015-09-30 | 辽宁新天宇业水泥制品有限公司 | Thick stone sea-filling layer prestressing force high-strength concrete square pile construction method |
CN105274989A (en) * | 2014-06-26 | 2016-01-27 | 中国二十冶集团有限公司 | Pile sinking method for PHC pipe pile in clayey-soil-containing medium-coarse sand layer |
-
2009
- 2009-05-18 KR KR1020090043276A patent/KR20100124165A/en not_active Application Discontinuation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101253051B1 (en) * | 2012-09-05 | 2013-04-10 | 주식회사 에이스올 | Arching pile |
CN105274989A (en) * | 2014-06-26 | 2016-01-27 | 中国二十冶集团有限公司 | Pile sinking method for PHC pipe pile in clayey-soil-containing medium-coarse sand layer |
CN104947664A (en) * | 2015-06-30 | 2015-09-30 | 辽宁新天宇业水泥制品有限公司 | Thick stone sea-filling layer prestressing force high-strength concrete square pile construction method |
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A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E601 | Decision to refuse application |