JPH068435U - Pile head reinforcement structure - Google Patents

Abstract

(57) [Abstract] [Purpose] The bottom plate is also used as a pile lid and is attached to the bottom of the cage reinforcement to reduce the number of construction members and processes to improve the construction performance of the pile head, its reliability and cost. It is to provide a pile head reinforcement structure that enables saving. [Structure] A plurality of bolts 3 are projectingly provided at a lower portion of a basket-like reinforcing bar 1 with a knitted bar 5 to be fitted and arranged in a pile head 10a at a circumferential interval so as to be fitted inside the pile head 10a. Bottom plate 7
A plurality of bolt holes 8 corresponding to the bolts 3, and a plurality of locking projections 9 which are bent and deformed upward at the peripheral edge of the bottom plate 7 are radially provided at circumferential intervals. It is characterized in that the bottom plate 7 is also used as a pile cover. Also,
The lower part of the cage-shaped reinforcing bar 1 with the kanzashi bar 5 which is fitted and arranged in the pile head 10a is fixed to the bottom plate 7 which is fitted inside the pile head 10a 4a, and at the periphery of the bottom plate 7. It is characterized in that a plurality of locking projections 9 which are bent and deformed upward are radially provided at circumferential intervals and the bottom plate is also used as a pile lid.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pile head reinforcement structure such as a PC pile that is widely used as a pile foundation for various structures.

[0002]

[Prior art]

 Explaining a conventional example of PC piles, a pile lid is placed on the head of the placed PC piles to prevent dirt and sand from entering, and the earthwork work such as backfilling around the area, chipping, and discarding concrete is completed. Then, the pile lid was removed, the bottom plate for concrete placement was fitted in the pile head, and it was hung and fixed with steel bars, etc., and the cage reinforcement consisting of multiple pile head reinforcements and hoop reinforcements was attached. It is installed in the pile head part, and concrete is placed inside and on the top of the pile head part to reinforce the pile head part and integrally join it to the foundation to construct the pile foundation.

[0003]

[Problems to be solved by the device]

 In the conventional construction of PC piles, in addition to the bottom plate and the cage-shaped reinforcing bars as described above, pile cover and bottom plate arranging members and the like are required, which requires a large number of steps and labor, resulting in high cost, and the bottom plate and the cage. There is a problem that the fitting and placement of the bar-shaped reinforcing bars are likely to vary, which causes a decrease in construction performance and reliability.

The present invention was developed in order to address the above-mentioned problems. The purpose of the present invention is to mount the bottom plate also as a pile lid and attach it to the lower part of the cage reinforcement, It is to provide a pile head reinforcement structure that reduces the number of construction parts and processes, improves the construction performance of the pile head, its reliability, and enables cost savings.

[0005]

[Means for Solving the Problems]

 Plural bolts are projected at the lower part of the cage-like reinforcing bar with kanzashi that is fitted and arranged in the pile head, and multiple bolt holes are formed in the bottom plate fitted inside the pile head. Are arranged in correspondence with the above bolts, and a plurality of locking projections that are bent and deformed upward at the peripheral edge of the bottom plate are radially arranged at circumferential intervals, and the bottom plate also serves as a pile cover. Or the bottom part of the cage-shaped reinforcement muscles with kanzashi muscles that are fitted to the head of the pile and fixed to the bottom plate that is fitted inside the head of the pile. A plurality of locking projections that are bent and deformed upward at the part are radially arranged at circumferential intervals, and the bottom plate is also used as a pile lid, so that the bottom plate also serves as a pile lid and cage reinforcement It can be attached to the bottom of the streak, reducing the number of construction members and processes, making pile construction easier and improving construction accuracy and reliability. It is fit.

[0006]

[Action]

 The bottom plate is placed on the pile head by a plurality of locking projections protruding from the periphery to serve also as a pile lid to prevent dirt and sand from entering the inside of the pile and to fold the locking projection upward. Attach the bent and deformed bottom plate to the bottom of the cage reinforcement with multiple bolts or fix them directly, and then fit the bottom plate together with the cage reinforcement into the pile head, and insert the middle part of the cage reinforcement. If you insert the kanzashi muscle into the pile and arrange it on the pile head, the bottom plate and the cage reinforcement are easily and accurately arranged at the predetermined positions on the pile head by the guide function of each locking projection. Concrete is placed inside and on the top of the head to make it easy and quick to construct a foundation.

[0007]

【Example】

 1 and 2 show a first embodiment of the present invention, and FIG. 3 shows a second embodiment. In the figure, 1 is a cage-shaped reinforcing bar which is fitted and arranged in the pile head portion 10a, 5 is a kanzashi reinforcing bar which holds the cage-shaped reinforcing bar fitted to the pile head at a predetermined height, and 7 is a pile A bottom plate 10 fitted into the inside of the head is a PC pile, and the cage reinforcement 1 is a pile head reinforcement 2 with a plurality of hooks 2a and a hoop reinforcement 3 as shown in FIGS. Is formed into a cage shape by welding, and a plurality of the knitting muscles 5 are inserted as shown in the drawing. In the first embodiment of FIG. A second embodiment shown in FIG. 3 has a structure in which the bolt 2b is projected by means of welding or the like (or the lower end portion itself is formed into a bolt), the bolt 2b is inserted into the bolt hole 8 of the bottom plate 7 and attached by the nut 4. Then, the lower end portions of the plurality of pile head reinforcing bars 2 are fixed to the bottom plate 7 by welding or the like. Further, the bottom plate 7 is formed into a saucer shape which is fitted inside the pile head portion 10a of the PC pile 10 to receive the concrete as shown in FIGS. 1 (A) and 3 (A). 2, a plurality of bolt holes 8 are arranged corresponding to the bolts 2b, and a plurality of locking projections 9 are circumferentially provided at the peripheral edge portion and radially project upward so that they can be bent and deformed. As shown in FIG. 3B and FIG. 3B, it is arranged on the pile head 0a and is also used as a pile lid.

In the first embodiment shown in FIGS. 1 and 2, on the pile head 10a of the PC pile 10 in which the bottom plate 7 is driven by the plurality of locking projections 9 as shown in FIG. 2 (A). It will be installed as a pile cover in the area to prevent the ingress of earth and sand during the earthwork work such as backfilling, chipping, and throwing away concrete. Further, the respective locking projections 9 are easily bent and deformed upward so that the bottom plate 7 can be fitted into the pile head 10a, and the bottom plate 7 is attached to the lower part of the cage-shaped reinforcing bar 1 by a plurality of bolts 2b and nuts. As shown in FIG. 1 (A), the bottom plate 7 is fitted in the pile head portion 10a together with the cage-shaped reinforcing bar 1, and the kanzashi muscle 5 is fitted and inserted in the middle portion of the cage-shaped reinforcing bar 1 as shown in FIG. When the bars are arranged on the head 10a, the locking projections 9 come into contact with the inner surfaces of the piles 10 to serve as guides, and the bottom plate 7 and the cage reinforcements 1 can be easily and accurately fitted at predetermined positions on the pile heads 10a. Then, concrete is placed on the inside and the upper part of the pile head 10a to be constructed as a foundation that is difficult to be easily constructed.

In the second embodiment shown in FIG. 3, the bottom plate 7 is fixed to the lower part of the cage-shaped reinforcing bar 1 by welding or the like, and the cage-shaped reinforcing bar 1 is attached to the pile head as shown in FIG. 3 (B). The bottom plate 7 is fitted into the inside of 10a, and the bottom plate 7 is arranged as the pile lid on the pile head 10a of the PC pile 10 by the plurality of locking projections 9, and the cage reinforcing bar 1 is used for the earthwork work. Etc. can be housed so as not to get in the way (the same can be used in the first embodiment described above), and as shown in FIG. 3 (A), the bottom plate 7 is fitted in the pile head 10a together with the cage-shaped reinforcing bar 1. Similarly, when the kanzashi muscle 5 is laid out, the bottom plate 7 and the basket-like reinforcing bar 1 can be easily and accurately fitted in a predetermined position of the pile head 10a to lay the concrete, as in the first embodiment. It is constructed as a shii foundation.

As described above, the present invention eliminates the need for a dedicated pile lid, a bottom plate fitting member, a fixing arrangement member, etc., and the bottom plate 7 also serves as a pile lid, and together with the cage-like reinforcing bar 1, the pile can be easily and accurately piled. By fitting the head 10a, the number of construction members and processes are reduced, and the construction process is remarkably simplified, resulting in significant cost savings. The structure of the cage-shaped reinforcing bar 1, the number of bolts provided at the lower end of the cage-shaped reinforcing bar 1, and the number of fixings can be appropriately modified.

[0011]

[Effect of device]

 According to the present invention, as described above, the bottom plate is arranged on the pile head by the plurality of locking projections protruding from the peripheral portion thereof to serve also as the pile lid to prevent the entry of earth and sand into the inside of the pile, and the locking. The bottom plate can be fitted into the pile head by bending and deforming the projecting protrusion upward, and the bottom plate is attached to the lower part of the cage reinforcement by a plurality of bolts or directly fixed, and the bottom plate is fixed. When the bottom plate and the cage reinforcement are fitted into the pile head together with the bar-shaped reinforcement, and the knotted reinforcement is inserted and arranged on the pile head, the bottom plate and the cage reinforcement are reinforced by the guide function of each locking projection. It is easily and accurately arranged in a predetermined position of the part, and concrete is placed inside and on the top of the pile for easy and quick construction on the pile foundation. Its reliability has been significantly improved, enabling significant cost savings.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view (A) showing the first embodiment of the present invention, its XX view (B), and an enlarged view of a Y portion (C).

FIG. 2 is a vertical cross-sectional view (A) using the bottom plate as a pile cover and its plan view (B).

FIG. 3 is a vertical sectional view (A) showing a second embodiment and a vertical sectional view (B) using a bottom plate as a pile cover.

[Explanation of symbols]

 1 Reinforcing Bar-shaped Reinforcing Bar 2b Bolt 4a Fixed 5 Kanzashiu 7 Bottom Plate 8 Bolt Hole 9 Projection for Locking 10a Pile Head

Claims (2)

[Scope of utility model registration request] 1. A bottom plate fitted inside a pile head, wherein a plurality of bolts are projected at a lower portion of a basket-like reinforcing bar with a knitted strip that is fitted and arranged in the pile head, and the bolt is fitted inside the pile head. A plurality of bolt holes corresponding to the bolts are provided, and a plurality of locking projections that are bent and deformed upward at the peripheral edge of the bottom plate are radially provided at circumferential intervals. A pile head reinforcement structure characterized in that the bottom plate is also used as a pile lid. 2. A lower part of a basket-shaped reinforcing bar with a knitted bar that is fitted and arranged on a pile head is fixed to a bottom plate fitted inside the pile head, and is attached to a peripheral portion of the bottom plate. A pile head reinforcement structure characterized in that a plurality of locking projections that are bent and deformed upward are radially provided at circumferential intervals and the bottom plate is also used as a pile lid.