JPH022760Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a pile cap for driving piles, and the basic shape is a pile cap for a pile diameter of 600 mm (hereinafter referred to as the cap body). By fitting an adapter suitable for each pile diameter into the cap body, it is possible to construct piles with diameters of 300 to 1200 mm using the same pile driver without having to replace the cap body.

Conventionally, when constructing two or more types of piles with different outside diameters using the same pile driver, there are two methods: (1) Prepare cap bodies with dimensions that match the pile diameters.

(2) A method of preparing a pile fitting tube that matches the pile diameter on the bottom plate of the cap body, and screwing it to the cap body with bolts each time the pile diameter differs.

is adopted. The former is uneconomical because the cap itself is expensive, and the latter is dangerous because impact inertia and bending moment at the time of hanging the pile act on the connecting bolts, making the bolts more likely to loosen.

The purpose of the present invention is to eliminate the drawbacks of the conventional methods described above. For example, by using one basic cap body for piles with a diameter of 600 mm, it can be used for piles with a smaller diameter of, for example, 300 to 500 mm. For piles with diameters of 700 to 1200 mm, use adapters for small diameters with dimensions corresponding to the pile diameter. By manufacturing welded assemblies that can be fitted freely, using adapters for small or large diameters depending on the pile diameter, and mounting and attaching these without directly tightening bolts, 1.
This allows piles with diameters of 300 to 1200 mm to be constructed using the same pile driver as the basic cap body without changing the cap body.

An example of the implementation of the present invention will be explained below with reference to the drawings. Figure 1 shows a basic cap body 1 with a pile diameter of 600 mm, for example. A pile fitting cylinder 1c is attached to the lower part of a block body 1b having an air vent hole 1a. are integrally assembled by welding through the flange 1d and the reinforcing rib 1e, and are in opposing contact with the hammer 4 through the upper cushion 2 and the lower cushion 3, respectively, and the concrete pile 5 is fitted therein. FIG. 2 shows a state in which a small diameter adapter 6 with a pile diameter of 300 to 500 mm is attached, and the pile is attached to the top of a cylinder 6a adapted to the pile diameter that protrudes slightly downward from the pile fitting cylinder 1c of the cap body 1. A top plate 6b with a diameter slightly smaller than the inner diameter of the fitting cylinder 1c is welded, and a ring-shaped disc 6c with the same diameter as the top plate 6b is welded to the outer periphery of the cylinder 6a, so that the gap between the top plate 6b and the ring-shaped disc 6c is It is connected and reinforced with ribs 6d. A suitable number of adapter bolt insertion holes 1f are bored at the tip of the pile fitting cylinder 1c, and bolts 7 are screwed into the bolt insertion holes 1f to insert the small diameter adapter into the pile fitting cylinder 1c. The ring-shaped disc 6c of the adapter 6 is locked and prevented from falling off.

Figure 3 shows a state in which a large diameter adapter 8 with a pile diameter of 700 to 1200 mm is attached, and the pile fitting tube 1c
A rib 8c is welded between the top plate 8a, which has a diameter slightly smaller than the inner diameter of the pile, and the bottom plate 8b, which is adapted to the pile diameter, in a parallel straight line up to the tip of the pile fitting tube 1c, and further expanded into a shape that matches the pile diameter. Furthermore, a cylinder 8d is provided on the lower surface of the bottom plate, and a ring 8e for preventing the adapter from coming off is fixed to the intermediate position of the straight portion of the rib 8c. The right half of Figure 4 shows how the one in Figure 2 is used, and the left half shows how the one in Figure 3 is used. 9 is a guide gib to be attached to the leader of a pile driver, and 10 is a guide gib for attaching to the leader of a pile driver. Showing the soundproof cover.

According to this invention, approximately 1/1/2 of the cost of an expensive cap body
An inexpensive adapter that can be made for about 10 yen,
Moreover, since it is attached so that it can be easily removed, it can be installed inexpensively and easily, and the bolt that prevents the adapter from falling off is designed to prevent the adapter from falling off when the cap body is lifted. This method has the advantage that there is no danger at all because there is no impact inertia when driving the pile and no bending moment when lifting the pile.

[Brief explanation of the drawing]

The drawings show one example of the implementation of the present invention. Figure 1 is a sectional view of only the cap body, Figure 2 is a sectional view of the cap with a small diameter adapter attached, and Figure 3 is a sectional view of the cap with a large diameter adapter attached. FIG. 4 is a sectional view showing the state of use. The symbols in the drawings indicate the following members, respectively. 1: Cap body, 2: Upper cushion, 3: Lower cushion, 4: Hammer, 5: Concrete pile,
6: Adapter for small diameter, 7: Bolt, 8: Adapter for large diameter, 9: Guide gib, 10: Soundproof cover.

Claims (1)

[Scope of utility model registration request] At the bottom of the cap body 1 on which the upper cushion 2 is placed, for example, a basic pile fitting tube 1c compatible with a pile with a basic diameter of 600 mm is assembled, and a bolt insertion hole 1f is formed in the bottom of the basic pile fitting tube 1c. An appropriate number of cylinders 6a are provided to fit piles of various sizes with a smaller diameter than the basic diameter, and holes of a size that can slide inside the basic pile fitting cylinder 1c are provided on the top and sides of the cylinders 6a. A plate 6b and a ring-shaped disc 6c are fixed to form an appropriate number of sets of small diameter adapters, and an appropriate number of cylinders 8d each adapted to piles of various sizes with a diameter larger than the basic diameter, and a bottom plate fixed to the top thereof. 8b and a rib 8 on the top of the bottom plate 8b.
A suitable number of sets of large-diameter adapters are formed by fixing a top plate 8a and a ring plate 8e with dimensions that allow them to slide inside the basic pile fitting cylinder 1c through c, and a ring-shaped disc in the small-diameter adapter. 6c or a pile cap for driving piles in which a ring plate 8e in a large-diameter adapter is locked by a bolt 7 screwed into a bolt insertion hole 1f in the basic pile fitting tube 1c to prevent it from falling off.