JP3076018U - Reinforcing tools for hollow pile rotating burial - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an economical hollow pile rotating and burying tool which can be applied to a plurality of types of hollow piles having different inner diameters and can surely suppress the deformation of the pile head due to torque. SOLUTION: A reinforcing tool 1 is fitted to a pile head of a steel pipe pile 11, a rotating cap 13 is put thereon, and fixed using a locking portion 12 protruding from an outer surface of the pile head. The reinforcement 1 has an outer diameter of a truncated cone having a larger diameter at the upper end and a smaller diameter at the lower end, and fits in the pile head at a portion where the outer diameter matches the inner diameter of the steel pipe pile 11. In this state, the torque from the rotary press-fitting device is transmitted through the rotary cap 13, and the steel pipe pile 11 is rotary-pressed into the ground. Since the reinforcing member 1 is fitted inside the pile head, deformation due to torque applied to the pile head at the time of rotary press fitting can be suppressed.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a hollow pile rotating burial reinforcement used to rotationally press a steel pipe pile or other hollow pile into the ground and suppressing deformation of the pile head due to torque for rotational press fitting. is there.

[0002]

[Prior art]

 As a method for constructing pre-formed piles, a method is widely used in which a rotating cap is put on the pile head, the torque of the rotary press-fitting device is transmitted to the pre-formed pile through the rotating cap, and the pile is buried in the ground.

[0003] In this case, as a rotating cap, two or more hook-shaped notches are provided in a cylindrical body having an outer diameter larger than the pile head, and the notches are previously provided on the outer peripheral surface of the pile head of the existing pile. There is a type that transmits the torque by locking to the locking portion that has been set. In addition, some have a locking part formed inside the pile head.

In this case, as the depth of the rotary burial becomes deeper, the torque on the pile head increases, and in the case of a thin steel pipe pile or the like, the pile head may be deformed.

On the other hand, Japanese Utility Model Registration No. 2572379 discloses a steel pipe pile 11 to be buried in a rotary embedding as a reinforcing tool for suppressing deformation of the steel pipe pile head due to torque, as shown in FIG. A reinforcing member as a rotational reinforcing body 21 is described in which a thick pipe 21b that is loosely fitted in the pile head of the steel pipe pile 11 is suspended from a circular plate 21a having a diameter placed on the head end of the steel pipe pile 11.

The rotating reinforcing body 21 is inserted into the head of the steel pipe pile 11, the disk 21 a is placed on the pile head, and the rotary cap 13 is put thereon from above, and the notch 14 of the rotary cap 13 is inserted into the steel pipe pile. 11 is engaged with a locking portion 12 protruding from the outer peripheral surface of the pile head 11, and in this state, torque from the rotary press device is transmitted to the steel pipe pile 11 via the rotary cap 13.

At this time, since the rotation reinforcing member 21 is inserted into the pile head, it is possible to suppress the deformation of the steel pipe pile 11 head inward when a large torque is applied.

[0008]

[Problems to be solved by the invention]

 However, in the above-mentioned conventional reinforcing tool, it is premised that the outer diameter of the thick pipe 21b is slightly smaller than the inner diameter of the steel pipe pile 11, and it cannot be applied to a plurality of types of piles having different diameters. In each case, corresponding reinforcement is required.

[0009] Such a reinforcement is relatively expensive because it must have sufficient rigidity to suppress deformation of the steel pipe pile head, and a large number of reinforcements are prepared for each steel pipe diameter. Doing so increases the construction cost and is inconvenient to handle.

[0010] Furthermore, when the present invention is applied to a steel pipe pile having a specific diameter as a target, if the difference between the inner diameter of the steel pipe pile and the outer diameter of the reinforcing tool is small, deformation of the steel pipe pile causes deformation of the steel pipe pile, etc. While loose fitting may be difficult, there is a problem that if the difference between the inner diameter of the steel pipe pile and the outer diameter of the reinforcement is large, deformation of the pile head due to torque cannot be sufficiently suppressed.

The invention of the present application is intended to solve the above-described problems of the conventional reinforcing device, and can be applied to a plurality of types of hollow piles having different inner diameters. The purpose is to provide an economical reinforcement for rotating hollow piles that can be reliably suppressed.

[0012]

[Means for Solving the Problems]

 The hollow pile rotating embedding reinforcing device according to claim 1 of the present application is a reinforcement for suppressing deformation of a pile head due to the torque of a hollow pile rotatably embedded in the ground by applying a torque to the pile head. The outer diameter of the upper end is larger than the inner diameter of the target hollow pile, and the outer diameter of the lower end is smaller than the inner diameter of the hollow pile. In this state, the hollow pile is given sufficient rigidity to restrain the inward deformation of the pile head.

[0013] Since the outer surface of the reinforcement has a truncated conical shape that tapers from the upper end to the lower end, even if the pile head is slightly deformed, it can be easily inserted into the pile head, and It also has the function of correcting the deformation of the part.

[0014] Further, since the reinforcing member comes into close contact with the inner surface of the hollow pile at the height at which it stops, deformation due to torque applied via a rotary cap or the like, particularly deformation to the inside of the hollow pile, can be efficiently suppressed. Further, since the diameter changes from the upper end to the lower end of the reinforcement, the present invention can be applied to hollow piles having different diameters within the range of the diameter change.

The fact that the hollow pile is provided with sufficient rigidity to restrain the inward deformation of the pile head when fitted to the pile head is that the reinforcing member is torqued to make the hollow pile strong. Means that the head has sufficient rigidity to prevent the head from deforming inward.

For this purpose, a certain degree of hardness and a thickness corresponding to the material are required, but there is no particular limitation as long as the above-mentioned deformation of the pile head can be suppressed. As an example, castings such as cast iron are relatively inexpensive and easy to manufacture into any shape.

The hollow pile to be used is mainly a thin steel pipe pile having a relatively small diameter, but is generally applied to a hollow pile that may be deformed due to torque during construction by rotary burial. It is possible.

[0018] The reinforcing device for rotating and embedding a hollow pile according to claim 2 of the present application suppresses the deformation of the pile head caused by the torque of the hollow pile that is rotationally embedded in the ground by applying a torque to the pile head. And a truncated cone having an outer diameter at the upper end larger than the inner diameter of each of the plurality of types of hollow piles and an outer diameter at the lower end smaller than the inner diameters of the plurality of types of hollow piles. The hollow pile has a rigidity sufficient to restrain deformation of the hollow pile inside the pile head when fitted to the pile head.

The basic configuration is the same as that of the reinforcing device for rotating and embedding a hollow pile according to claim 1, and the outer diameters of the upper end and the lower end of the reinforcing device are set to a plurality of target objects, that is, the inner diameters of two or more hollow piles. Therefore, it is possible to apply it to multiple types of hollow piles with one reinforcement.

A third aspect of the present invention is the hollow pile rotary embedding stiffener according to the first or second aspect, wherein the first stiffener has a diameter smaller than the target hollow stake inside the cross section thereof. A second reinforcing tool for the hollow pile is detachably fitted.

In the case of the reinforcing tool according to the first and second aspects, the present invention can be applied to hollow piles having a plurality of diameters. In some cases, several types of these reinforcements must be prepared.

In the reinforcing device according to the third aspect, since the second reinforcing device can be stored inside the first reinforcing device, there is an advantage that the reinforcing device does not become bulky during transportation or the like. When the first reinforcement is used, the inner second reinforcement may be removed according to its rigidity and weight, or may be used integrally without being removed.

Similarly, it is conceivable that a third reinforcing member is detachably fitted inside the second reinforcing member so as to be applicable to a larger number of pile diameters.

[0024]

[Embodiment of the invention]

 FIG. 1 shows a use state in one embodiment of the invention according to claims 1 and 2 of the present application. In this example, the reinforcing tool 1 of the present invention is fitted to the pile head of the thin steel pipe pile 11, A rotating cap 13 is put on the steel pipe pile 11 from above, and a notch (not shown, see notch 14 in FIG. 3 (b)) of the rotating cap 13 is engaged with the locking portion 12 protruding from the outer surface of the pile head of the steel pipe pile 11. Combine.

The reinforcing device 1 has an outer diameter of a truncated cone having a larger diameter at the upper end and a smaller diameter at the lower end as shown in the figure, and a pile head at a portion where the outer diameter matches the inner diameter of the steel pipe pile 11. The torque from the rotary press-fitting device is transmitted via the rotary cap 13 in this state.

Since the position at which the reinforcement 1 stops depends on the inner diameter of the steel pipe pile 11, a hollow pile having an inner diameter in the range of the maximum diameter and the minimum diameter (actually slightly larger than the minimum diameter) of the reinforcement 1 is used. Applicable.

In this embodiment, a recess 2 is formed on the upper surface of the reinforcement 1, and a suspension 3 is attached to the center of the depression 2, and the reinforcement 3 is lifted and lowered using the suspension 3. I can do it.

FIG. 2 shows an embodiment of the invention according to claim 3 of the present application. As a reinforcing tool, a first reinforcing tool 1a on the outside and a second reinforcing tool 1a detachably fitted inside the first reinforcing tool 1a. This is a combination of two reinforcements 1b.

In this example, a longitudinal engaging projection 4 is formed on the inner surface of the first reinforcing member 1a, and an engaging concave portion 5 is formed on the outer surface of the second reinforcing member 1b. is there. As a configuration for making the both detachable, a wedge, a pin, or another fixing tool (not shown) may be provided.

The maximum diameter of the second reinforcing member 1a is smaller than the minimum diameter of the first reinforcing member 1b. For hollow piles having an inner diameter smaller than the minimum diameter of the first reinforcing member 1a, the reinforcing member 1b is Can be used.

[0031]

[Effect of the invention]

  Since the outer surface of the reinforcement has a truncated cone shape that tapers from the upper end to the lower end, it can be easily inserted into the pile head even if the pile head is slightly deformed, and the pile head It also has the function of correcting the deformation of.

Since the outer surface of the reinforcing member comes into close contact with the inner surface of the hollow pile at the height at which the reinforcing member stops, deformation of the hollow pile head due to torque can be suppressed efficiently.

By changing the diameter from the upper end to the lower end of the reinforcing member, the present invention can be applied to hollow piles having different diameters within the range of the change in the diameter.

In the reinforcing device according to the third aspect, since the second reinforcing device can be stored inside the first reinforcing device, it is not bulky at the time of transportation or the like, and the applicable range of the target hollow pile is expanded. .

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a use state in an embodiment of the invention according to claims 1 and 2 of the present application.

FIG. 2 is a perspective view showing an embodiment of the invention according to claim 3 of the present application.

3A and 3B show a conventional example, in which FIG. 3A is a vertical sectional view showing a use state, and FIG. 3B is an exploded perspective view thereof.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Reinforcing tool, 1a ... 1st reinforcing tool, 1b ... 2nd reinforcing tool, 2 ... recessed part, 3 ... hanging metal fittings, 4 ... engaging convex part, 5 ... engaging concave part, 11 ... steel pipe pile, 12 ... Locking part, 13 ... Rotating cap, 14 ... Notch, 21 ... Rotation reinforcing body (conventional example), 21
a: disk, 21b: thick tube

Claims (3)

[Utility model registration claims] 1. A reinforcing tool for suppressing deformation of a pile head caused by the torque of a hollow pile rotatably buried in the ground by applying torque to the pile head, the outer diameter of the upper end being a target. The inside diameter of the hollow pile is larger than the inner diameter of the hollow pile, and the outer diameter of the lower end is smaller than the inner diameter of the hollow pile. A stiffener for rotating and burying hollow piles, which has sufficient rigidity to restrain deformation of the pile. 2. A reinforcing tool for suppressing deformation of a pile head caused by the torque of a hollow pile rotatably buried in the ground by applying a torque to the pile head, the outer diameter of the upper end being a target. A plurality of different types of hollow piles having a truncated conical outer shape whose outer diameter at the lower end is larger than the respective inner diameters of the plurality of types of hollow piles and smaller than the respective inner diameters of the plurality of types of hollow piles, and is fitted to the pile head of the hollow pile. A reinforcing device for burying and rotating a hollow pile, which has sufficient rigidity to restrain deformation of the pile inside the pile head. 3. A hollow pile rotating and burying reinforcing device according to claim 1 or 2, wherein said first reinforcing device is a first reinforcing device inside said cross section.
A reinforcing member for rotating and burying a hollow pile, wherein a second reinforcing member for a hollow pile whose diameter is smaller than that of the target hollow pile is detachably fitted.