JPH04115023A - Method of preventing pile to be abandoned from coming off and anchor body - Google Patents

Abstract

PURPOSE:To increase the resistance force against pulling-out of a pile to be abandoned, by fitting an anchor body on the lower end part of the pile to be abandoned at a first position of a hook holes, then by integrally coupling them at a second position, and by opening a wing part journalled to the anchor body in accordance with a pulling-out force. CONSTITUTION:A pile 12 to be abandoned is fitted in an anchor body 1 having a sharp end part at a first position where protrusions 6 are fitted respectively in receiving parts 5a of hook holes 5, and the pile 12 to be abandoned is driven into the ground by a predetermined depth. Thereafter, the pile 12 is rotated to a second position where the protrusions 6 are fitted in locking parts 5b of the hook holes 5, and accordingly, the pile 12 is coupled integrally with the anchor body 1. Further, when a pulling force is exerted to the anchor body 1 by way of the pile 12, a wing part 2 which is journalled to the anchor body 1 by a pin 3 is opened so that the area making contact with the foundation increases, resulting in an increase in the resistance force against pulling-out of the pile 12. Further, the pile 12 is returned preferably from the second position to the first position so as to be separated from the anchor body 1.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method for preventing a pile from falling off and an anchor body, and particularly to a method for preventing a pile from falling off for fixing temporary equipment such as a temporary fence, and an anchor body for increasing the pull-out resistance of a pile.

[Conventional technology]

As an example of temporary equipment, FIGS. 10 and 11 show a temporary enclosure 11 used during construction work. To remove the temporary fence 11 in the illustrated example, first embed the piles 12, then tighten the column pipes 13 to the piles 12, and then tighten the horizontal pipes 12.
4 is attached to the column vibrator 13, the frame is reinforced by attaching a backing vibrator 15 and a connecting vibrator 16, and the net 17 and steel plate 18 are fixed to the column vibrator 13 and the horizontal pipe 14 of the frame using appropriate metal fittings.

[Invention or problem to be solved]

However, the piles 12 of the conventional temporary enclosure 11 are only used to drive single pipes such as steel pipes into the ground, and even if other members are tied together in the ground, there is no resistance against external pulling force. Therefore, it was unavoidable to rely solely on the friction of the outer circumference of the single tube. For this reason, when strong winds blow on the temporary fence 11, the piles 11
There was a problem that the fences were pulled out of the ground, and there were even cases where temporary fences 11 collapsed and caused other problems. Since there have been records of accidents resulting in injury or death due to the collapse of steel plate enclosures, measures are expected to be taken to increase the drag force against the removal of the piles 12. Another problem with single pipes was that they were difficult to drive into the ground because their tips were not sharp. Accordingly, an object of the present invention is to provide a method for preventing piles from falling out by increasing the resistance against pulling out of piles. Another object of the present invention is to provide an anchor body suitable for increasing resistance to pulling out of piles.

[Means to solve the problem]

Referring to the embodiments shown in FIGS. 1 to 4, the method for preventing a pile from falling out according to the present invention is to attach an anchor body 1 to the lower end of a pile 12 for fixing temporary equipment to the first hole of the hook hole 5 of the anchor body. position, the pile 12 is integrally coupled with the anchor body 1 in the pile driving direction at the second position, and the wing part 2 pivotally supported on the anchor body 1 responds to the unbowing force of the pile 12. A configuration is used in which the drag force is increased by opening the valve. Preferably, the pile 12 can be freely separated from the anchor body 1 by returning the pile 12 in the second position to the first position. In the illustrated example, the first position is a position where the protrusion 6 on the pile 12 engages with the attachment/detachment part 5a of the hook hole 5 of the anchor body l, and the second position is the position where the protrusion 6 on the pile 12 or the anchor body 1
This is the position where it engages with the locking portion 5b of the hook hole 5. Referring to the embodiments shown in FIGS. 5 to 8, the anchor body 1 according to the present invention has a hook that engages with a protrusion 6 fixed to the lower end of a pile 12 for fixing temporary equipment shown in FIG. A base 4 having a hole 5, a detachable portion 5a at a first angular position of the hook hole 5, and a locking portion 5b at a second angular position. In addition, a configuration including a wing portion 2 pivotally supported by a pin 3 perpendicular to the pile driving direction is used. Preferably, the lower end of the anchor body 1 is provided with a pointed head 10 .

[Effect]

To explain the operation, in order to drive the pile 12, first, as shown in FIG. After fitting the waste pile 12 to the anchor body 1, the waste pile 12 is driven together with the anchor body 1 in the driving direction indicated by the arrow to a predetermined depth. However, this fitting is not limited to the fitting between the projection 6 and the detachable portion 5a of the hook hole 5. After that, for example, arrow T in FIG.
By rotation in the direction, the pile 12 is moved to the second position where the protrusion 6 of the pile I2 fits into the locking part 5b of the hook hole 5 of the anchor body 10, and the pile 12 is connected to the anchor body 10. It is integrally connected in the direction of insertion. However, this fitting requires protrusion 6
The fitting between the hook hole 5 and the locking portion 5b of the hook hole 5 is not limited to this. When the pile 12 is in the second position, when a pulling force in the direction of arrow P in FIG. 3 is applied to the anchor body 1 via the pile 12, the pin 3 perpendicular to the pile driving direction The wing portion 2 pivotally supported by the anchor body 1 opens, increasing the contact area between the anchor body 1 and the ground, and increasing the resistance against pulling out. However, the wing part 2 can be attached to the anchor body 1 so as to be openable and closable 4-3.
It is sufficient that it can be rotated, and the pivot support is not limited to the pin 3. Preferably, by appropriately selecting the magnitude of rotation in the direction of arrow T in FIG. 2, the anchor body 1 is also shifted from the final position of the driving, and the blade tip 7 of the wing portion 2 is removed from the blade tip locus at the time of driving. To ensure the opening operation of part 2. In this way, one object of the present invention, ``providing a method J for preventing falling out of piles that increases the resistance to pulling out piles,'' has been achieved, and another object of the present invention, ``An anchor suitable for increasing the resistance to pulling out piles of piles'' has been achieved. The provision of "body" is also achieved. According to the present invention, the pile 12 can be freely separated from the anchor body 1 by returning the pile 12 to the first position as shown in FIG. That is, by pulling out the pile 12 in the direction of arrow P with a relatively small pulling force,
It becomes possible to easily remove and recover the pile 12 while leaving the anchor body 1 in the ground.

【Example】

In the embodiments shown in FIGS. 1 to 8, a pointed head 10 is formed at the lower end of the anchor body 1, and driving in the direction of the arrow in FIG. 1 is compared to the single pipe pile 12 in FIG. to make it significantly easier. FIG. 9 shows an example in which the protrusion 6 is formed by arranging hairpin-shaped bolts along the diameter of the pile 12. According to this pin-shaped bolt, a strong protrusion 6 can be provided. However, the present invention is not limited to the use of a hairpin bolt, as long as it is a projection protruding from the surface of the pile 12. In the above explanation, the hook hole 5 is L-shaped and the detachable part 5
a and a locking part 5b, the hook hole 5 of the present invention has an attachment/detachment part at the first position that engages with the protrusion 6 of the pile 12 and the protrusion 6 of the pile 12 when the hook hole 5 is pulled out of the pile 12. It is sufficient to have a locking portion that locks integrally in the direction, and is not limited to an L-shape. The inventor of the present invention slightly warped the wing tip 7 of the anchor body 1 outward, and rotated the pile 12 clockwise 1/4 turn from the driving end position in FIG. 1 in the direction of arrow T in FIG. 2. When the pile 12 was pulled up approximately 100 meters in the direction of arrow P in Figure 3, it was demonstrated that the wing section 2 could be sufficiently opened to generate a large pulling drag as shown in Figure 3. Ta. In this case, by rotating the pile 12 counterclockwise by 1/4 turn from the position shown in FIG. It was possible to remove and recover the pile 12 while leaving it in place.

【Effect of the invention】

As explained in detail above, the method and anchor body of the present invention for preventing a pile from falling off use the anchor body having a hook hole that can be freely attached to and detached from the pile, and a wing part that is pivotally supported so that it can be opened and closed. It has a great effect. (a) It is possible to obtain a significantly larger pull-out resistance than in the case of single pipe piles, and it is possible to prevent the collapse of temporary fences, etc. (b) By removing the pointed head, driving the pile can be made much easier than in the case of a single pipe pile.

[Brief explanation of drawings]

Figures 1 to 4 are explanatory diagrams of the method of the present invention, Figures 5 and 6 are side and plan views of the anchor body when the wing is closed, and Figures 7 and 8 are when the wing is open. FIG. 9 is an explanatory diagram of a pile protrusion, and FIGS. 10 and 11 are schematic explanatory diagrams of a temporary enclosure and a pile. 1... Anchor body, 2... Wing part, 3... Pin, 4
...Base, 5...Hook hole, 5a...Detachable part, 5
b...Locking part, 6...Protrusion, 7...Blade tip,
10... Pointed head, 11... Temporary fence, 12... Discard pile, 13... Pillar pipe, 14... Horizontal pipe,
15... Backup vibe, 16... Connecting pipe, 17
...Net, 18...Steel plate. Patent applicant: Kajima Corporation Patent application agent: Patent attorney: Tsugure Ichito

Claims (4)

[Claims] (1) The anchor body was fitted to the lower end of the pile for fixing temporary equipment at the first position, and the pile was integrally connected to the anchor body in the direction of pulling out the pile at the second position, and the pile was pivoted to the anchor body. A method for preventing a pile from falling out by increasing the drag force by opening the wings according to the pulling force of the pile. (2) In the method for preventing falling out of claim 1, by returning the driven pile in the second position to the first position, the pile can be freely separated from the anchor body, thereby preventing the pile from falling out. Method. (3) A hook hole that engages with a protrusion fixed to the lower end of a pile for fixing temporary equipment, a detachable part at the first angular position of the hook hole, a locking part at a second angular position, and a direction in which the pile is pulled out. An anchor body for dumping piles comprising wing parts pivoted by orthogonal pins. (4) An anchor body for dumping piles according to claim 3, comprising a pointed head at the lower end.