JPH01230810A - Spiral pile increasing buried-supporting force and buried-planting method thereof - Google Patents

Abstract

PURPOSE:To obtain a pile excellent in a holding force in the axial, falling and rotating directions even in a weak ground, with a simple planting construction by forming a spiral pile in such a way as rigidly mounting a spiral plate on a cylindrical main body while providing through-holes for press-discharging mortar on a cylindrical wall between the spiral plates. CONSTITUTION:One end of a cylindrical main body 2 made of hard material such as steel plate is drawn into a conical shape and is closed to form a tip 3 while the other end is rigidly provided with a connecting flange 5 mounting reinforcing ribs 4, 4.... Around the outer periphery of the cylindrical main body 2, there is rigidly provided a spiral plate 6 made of hard material such as steel plate while there is formed through-holes 8, 8..., interconnected to the inside, spaced at a suitable interval between a pitch of the spiral plate 6. Thus, the spiral pile is formed. Onto the connecting flange 5 of the spiral pile 1 buried in the earth is attached a connecting metal piece of a supply pile of a fluid press-feed device and high strength and quick- drying mortar is charged under high pressure into the inside thereof so as to discharge it into the earth via through-holes 8, 8..., thus forming underfined mortar block which is integrated with the spiral pile body in the circumference of the spiral pile.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a spiral pile with enhanced buried bearing capacity and a method for burying the spiral pile, which is related to tree support technology that requires high-altitude bearing capacity.

[Conventional technology]

Conventionally, stakes driven into the ground have been generally used to establish various pillars and stakes for fences, or to support pitched tents, vinyl houses, etc., but these stakes are simply driven into the ground and fixed. Since it is a soft ground, the gripping force in the axial direction is of course small, and the gripping force in the tilting direction and rotational direction is also small. Therefore, when burying a pile that requires a strong gripping force, use a pile with a structure in which a cross-shaped root frame is fixed to the buried part of the pile.

The gripping force in the tilting and rotational directions has been increased, or an anchor with a special structure has been used.

[Problem to be solved by the invention]

However, the anchors with the above special structure have the problem that not only the manufacturing cost of the anchor increases, but also the on-site construction cost when buried. When using piles with a structure in which a frame is fixed, the root frame must be buried, which has the problem of increasing the excavation work area during establishment.

However, in recent years, the demand for parabolic antennas for receiving satellite broadcasting radio waves has increased, and when establishing support columns for the parabolic antennas, there is a demand for stakes with strong gripping power that can support the parabolic antennas without changing their orientation. has been
Not only is tree construction easy, but it can also be used in the axial direction even on soft ground.
There has been a demand for a pile that can sufficiently exert gripping force in the tilting and rotational directions.

The present invention has been made in view of the above problems, and the present invention has been made in view of the above problems.
The present invention aims to provide a spiral pile having a structure with enhanced supporting capacity, and also to propose a method for burying and establishing a spiral pile having the structure.

[Means to solve the problem]

That is, the spiral pile with enhanced buried bearing capacity and the method for burying the spiral pile according to the present invention are characterized in that an amorphous mortar that is integrated with the pile body is placed in the soil around the spiral pile that is screwed and buried in the soil. A lump is formed to provide support for burial.

Therefore, the structure of a spiral pile is such that a lathe plate having an appropriate width is fixed around the outer periphery of a cylindrical body of an appropriate length with one end closed in the shape of a conical tip, and a lathe plate having an appropriate width is fixed around the entire length or a part of it. A plurality of through holes communicating with the inner cavity are formed in the cylindrical wall of the cylindrical body, and a connecting means such as a flange is provided at the open end of the cylindrical body.

[Effect]

After the conical tip of the spiral pile configured as described above is driven into the land surface at the buried location, when the spiral plate turns in a direction to dig into the soil, the pile body is buried by the surface direction drag of the spiral plate. When the pile body is buried to a predetermined depth and mortar is injected under high pressure from the end of the supply pipe of the fluid pumping device connected to the connecting means of the cylindrical body, the mortar is poured through the plurality of through holes drilled in the cylindrical wall. is extruded into the soil to form an amorphous mortar mass that is integrated with the pile body at 11 places around the pile body. Therefore, when a high-strength, quick-drying mortar is used, in addition to the surface resistance of the spiral plate, the amorphous hard structure formed by the mortar creates a strong force in the axial, tilting, and rotational directions of the pile body. Buried bearing capacity can be obtained.

Therefore, the spiral pile is useful in the establishment of support columns for satellite broadcasting radio wave receivers (R parabolic antennas, etc.) where maintenance stability in the direction of establishment is required.

〔Example〕

Hereinafter, one embodiment of a spiral pile with enhanced buried bearing capacity according to the present invention and a method for burying this spiral pile will be described with reference to the drawings.

Figures 1 to 4 show the structure of a spiral pile 1 having a relatively long above-ground section, and one end of a cylindrical body 2 made of a hard material such as a steel pipe is conically closed or At the same time as forming the tip 3 by fixing another member of the shape,
A connecting flange 5 provided with reinforcing ribs 4.about.4 is fixedly attached to the other end.

The structure of this embodiment is such that spiral plates 6 of appropriate width and pinch size made of hard materials such as steel plates are fixed to the outer periphery of the cylindrical body 2 at intervals corresponding to the buried length of the pile body. Now, the outer diameter of the spiral plate near the tip side is gradually reduced toward the tip. Further, in the buried portion of the cylindrical body 2, there are through holes 8, 8, which communicate with the inner cavity 7 with an appropriate interval between the pinches of the spiral plate 6.
Preferably, the through holes 8 are arranged in parallel in the radial direction (in this embodiment, they are equally bored in three directions at 120 degree intervals).

The spiral pile 1 of the J-registered structure is connected to the erected column or the supply port of the fluid pumping device using bolt holes 9, 9, etc. drilled in the connecting flange 5, and is as follows. 4 to 6, on-site construction of a support column 10 for a parabolic antenna for receiving satellite broadcasting radio waves using the spiral pile will be explained.

(1) First, use the connecting flange 5 and spiral pile 1.
1 drive shaft end of hand ground auger or rotation jig 11
5 pillars with 10 standing positions with the center connecting end attached
A tip @3 is driven into the upper surface of the pile body, and the pile body is buried in the soil to a predetermined depth while turning the handle of the rotating jig 11 (see Fig. 4). When the spiral pile 1 rotates in the direction of the screw of the spiral plate 6, the spiral plate 6 bites into the underground soil, so that it can be easily buried even in fairly hard ground.

(2) Next, as shown in FIG. 5, attach the connecting fitting 12a configured at the end of the supply pipe 12 of the fluid pumping device (not shown) to the connecting flange 5 of the spiral pile 1 buried in the soil, and The inner cavity 7 is filled with strong, quick-drying mortar 14 under high pressure, and the mortar is forced out into the soil through the through holes 8, 8, etc., so that an amorphous mortar is formed around the spiral pile 1 and integrated with the pile body. A lump L4a is formed.

(3) In this state, the burial of the spiral pile 1 of the present invention is completed.
For example, as shown in FIG. 6, the flange loa, which is firmly recessed at the lower end of the support column 10 of the parabolic antenna for receiving satellite broadcast radio waves, is brought into contact with the end surface of the connecting flange 5, and fastened through bolts and nuts 13. Let it be established.

In addition, in Example 7+f, a disk-shaped flange was described as the structure of the spiral co-moving jig, the supply l of the fluid pumping device ift, and the connection part with the erected column, but the structure of this part may be different from other structures. Needless to say, it can constitute any type of connection means that connects things.

〔Effect of the invention〕

As described above, according to the spiral pile with enhanced buried bearing capacity and the method for burying the spiral pile according to the present invention, continuous irregular-shaped mortar lumps are extracted from the spiral pile buried in the soil. , since it forms in the soil surrounding the pile body, the underground gripping force of the amorphous hard structure formed by the mortar is added, and the spiral pile is buried in the axial direction, tilting direction, and rotation direction. The supporting capacity becomes stronger,
The effects after implementing the present invention are extremely large.

4. [, +1'- explanation of the drawing

Claims (4)

[Claims] (1) A spiral plate having an appropriate width is fixed around the outer periphery of a cylindrical body of an appropriate length with one end closed in the shape of a conical tip, and the cylindrical body is fixed between the spiral plates. This spiral pile has a plurality of through holes in the cylindrical wall that communicate with the inner cavity, and a connecting means such as a flange at the open end of the cylindrical body, thereby increasing the buried support capacity. (2) The spiral pile with enhanced buried bearing capacity according to claim 1, wherein the connecting means is a flange. (3) A pillar for supporting a parabolic antenna for receiving satellite broadcast radio waves, in which the spiral pile according to claim 1 is removably connected to the lower end of a pillar of an appropriate length via a connecting means. (4) Burying position After driving the tip of a pile body, which is made up of a spiral plate fixed around the outer periphery of a cylindrical body with one end closed in the shape of a conical tip, into the land surface, the spiral plate digs into the soil. The cylindrical body is buried to a predetermined depth by the surface direction resistance of the spiral plate, and mortar is injected under high pressure from the supply pipe end of the fluid pumping device connected to the open end of the cylindrical body. A buried support characterized by forcing mortar into the soil through a plurality of through holes drilled in a cylindrical wall to form an irregularly shaped mortar mass in the soil surrounding the pile body that is integrated with the pile body. A method for burying spiral piles with increased strength.