JPS5817789Y2 - Pile joining equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a joining device for steel pipe piles or concrete piles.

Traditionally, steel pipe piles or concrete piles are often used for the foundations of major structures, and since these are used as support piles, considerably long pile lengths are required to reach deep support foundations, but this is difficult in terms of manufacturing, transportation, and construction. It is difficult to satisfy this requirement with a single pile due to the
Construction work is carried out by joining several piles of approximately 100 to 100 ml on site, and in addition to welding, various mechanical joints have been devised for this joining.

However, welding is limited by the weather, takes a long time to complete, and the quality is easily affected by the skill of the worker, resulting in uneven quality. Especially in the case of concrete piles, due to the heat during welding, There are drawbacks such as a decrease in the strength of the end of the pile.

In addition, in order to eliminate the above-mentioned drawbacks, JP-A-54-
As shown in Figure 1, Publication No. 4411 discloses a first connecting member 1 that is attached to the end of one pile and has a tapered inner surface and a retaining surface, and a first connecting member 1 that is attached to the end of the other pile and has a tapered outer surface. A pile connecting device is described, which is characterized by comprising a second connecting member 2 having an engagement surface to be engaged with the above-mentioned retaining surface, but in this case, the connecting member is provided with a groove. Therefore, the pile becomes weak against the bending load applied to the pile, and if you try to make it able to withstand the bending load, the thickness of the connecting member will increase and the elasticity will decrease, making it extremely difficult to push in when connecting. Otherwise, there are drawbacks such as the connecting member breaking.

In order to eliminate the above-mentioned drawbacks of the conventional methods, the present invention connects the piles not by welding, but by securing male and female joining members pre-installed at the joining ends of the upper and lower piles, and the said joining members can withstand bending loads. This invention provides a pile joining device characterized in that it is reinforced from the inner periphery with a reinforcing ring for durability, and will be described below based on drawings showing embodiments.

Figures 2 to 4 show one embodiment of the present invention, Figure 2 is a longitudinal cross-sectional view of the bonded state, Figure 3 is a cross-sectional view taken along the line III-III in Figure 2, and Figure 4 is the state before bonding. In the vertical cross-sectional view, at the joint between the lower branch 3 driven first as a steel pipe pile and the upper pile 7 joined thereon, the upper end of the lower branch 3 has an upwardly expanding inner periphery. A cylindrical male joint member 4 having a conical surface 5 and an annular convex portion 6 for fitting into an annular recess of an upper pile described later is fixed together by welding.

A male connecting member 8 is fixed to the lower end of the upper pile 7 by welding, and the structure of the male connecting member 8 includes a conical surface 9 corresponding to the conical surface 5 on the outer periphery of the lower end of the cylindrical body, and an upper portion thereof. An annular recess 10 into which the annular protrusion 6 of the lower branch fits is provided on the outer periphery, and is locked in the compression and tension directions in the joined state shown in FIG.

Then, a plurality of notches are provided from the lower end surface of the male joining member 8, and a plurality of tongue pieces 11 and 11' are protruded from each other.
has elasticity in the radial direction and is capable of reducing and restoring its diameter dimension, and furthermore, on the inner circumference of each tongue piece 11, 11', one place on the circumference of the cylindrical ring is attached in the axial direction. A reinforcing ring 12 is cut into two pieces and has abutment surfaces 13 that abut each other at the ends. A stopper piece is fixed to the inner circumference of the tongue piece so that the reinforcing ring 12 can be slid in the circumferential direction but not moved in the axial direction. It is held by 14.

a tongue piece 11' located outside one end of the reinforcing ring 12;
The tip (lower end) of the reinforcing ring 12 is provided so as to protrude from the other tongues 11, and the other end of the reinforcing ring 12 is riveted or welded to prevent it from sliding in the circumferential direction with the tongues 11 located outside of the reinforcing ring 12. It may be fixed by

Next, to explain the action of the pile joining device having the above structure, the male joining member 4 is placed on the lower branch 3 fixed to the upper end.
The upper pile 7 with the male joining member 8 fixed to the lower end is erected, and the outer surface of the protruding tip of the tongue piece 11' is brought into contact with the inner circumferential surface of the annular convex portion 6 to reduce the weight of the suspended upper pile 7. Alternatively, the tongue piece 11' is manually pressed toward the center and suspended while being curved. At this time, as the tongue piece 11' moves toward the center, one end of the reinforcing ring 12 inside the tongue piece 11' is bent as shown in FIG. The mutual contact surfaces 13 are deformed into a letter shape, and in this state, the tips of the other tongues 11 reach the male joining member 4, and the mutual conical surfaces 5 and 9 separate the tongues 11°11. ' is reduced in diameter, and the reinforcing ring 12 is also not reduced accordingly, so the upper pile 7 descends and the annular recess 10 becomes the annular protrusion 6.
When the tongue pieces 11, 11', which had been reduced by fitting into each other, return to their original shape due to their elasticity, the inner reinforcing ring 12 also returns to its original annular shape due to its elasticity. The contact surfaces 13 come into contact with each other and the joining of the upper and lower branches is completed.

When a load is applied to the upper and lower branches 7, 3 joined as described above in the compression or tension direction, they will be locked at the upper and lower contact surfaces of the fitted annular protrusion 6 and annular recess 10, and When a load is applied in the bending direction, each tongue piece 11, 11
A force is applied to bend the tongues 11 and 11' inward, but the reinforcing ring 12 abuts its contact surface 13 to form an annular shape and supports the inner circumferential surface of each tongue piece 11, 11'. Each tongue piece 11
, 11' do not bend inward and therefore exhibit sufficient strength against bending loads.

The present invention is constructed as described above, with the upper and lower branches having the male joint member and the male joint member integrally processed at the end of the pile in advance at the factory, and the upper pile being erected on the lower branch at the construction site and delivered in the manner described above. It is extremely easy to join, as it can be joined by simply pulling it down, and can be completed in a short time regardless of the weather.Furthermore, the joined upper and lower branches are subjected to compressive, tensile and especially bending loads. It has excellent effects such as being able to exhibit sufficient strength against.

The present invention is not limited to the steel pipe pile in the above embodiment, but can also be applied to concrete piles, etc., and the male connecting member and the male connecting member may be installed upside down compared to the above embodiment. Since the male connecting member is the upper end of the lower branch, the lower branch may be driven in after covering with a protective cap (not shown).

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an example of a conventional pile connecting device, Figs. 2 to 5 show an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the connected state, and Fig. 3 is FIG. 2 is a sectional view taken along the line III, FIG. 4 is a longitudinal sectional view before joining, and FIG. 5 is a plan view of the reinforcing ring in FIG. 4. 1: First connecting member, 2: Second connecting member, 3: Lower branch, 4:
Male joining member, 5: conical surface, 6: annular convex portion, 7: upper pile,
8: Male joining member, 9: Conical surface, 10: Annular recess, 11
．． 11': Tongue piece, 12: Reinforcement ring, 13: Contact surface, 1
4: Stopping piece.

Claims (1)

[Scope of utility model registration request] At the joint of the pile, a cylindrical male joint member 4 having an annular projection 6 on the inner periphery is provided at one end of the pile, and an annular recess 10 that fits into the annular projection 6 is provided on the outer periphery of the cylindrical body. A plurality of tongue pieces 11, 11' having elasticity in the radial direction are provided with a plurality of notches at the ends thereof, and each tongue piece 11,
A reinforcing ring 12 having an abutment surface 13 at the end by cutting one part of the circumference is held on the inner circumference of the reinforcing ring 11', and a tongue piece 11' located outside one end of the reinforcing ring 12 is held on the inner circumference of the reinforcing ring 11'. The end of the other stake faces the male joining member 8 whose tip protrudes from the other tongue piece 11 and is capable of detaching and engaging the contact surface 13 of the reinforcing ring 12 by moving the tongue piece 11' in the radial direction. A pile joining device characterized in that it is provided in a section.