JPS6054457B2 - Pile driving method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pile driving method used when driving steel pipe sheet piles for shoring.

The purpose is to place the piles adjacent to the existing piles in parallel at regular intervals, and to drive the piles with extremely low noise. An example of equipment used in this invention method will be explained below with reference to FIGS. 1 and 2.

-、゛↓↓Kubi 1--11:: 1-M11fu・■
■■1, ゜IJ, J, -1-゛-J, ι, - A circumcision rod with a wing bit 2, which is attached to the outer circumferential surface of the ι-shaped part near the bit at regular intervals in the longitudinal direction of the rod. A flange 3 is provided.

Furthermore, a split bearing inner ring 4a is mounted on each opposing side. Reference numeral 5 designates a split flange connected to each bearing inner ring portion via a connecting rib body 6 for mounting, and by tightening bolts to the mounting flange 3, the bearing inner ring 4
This makes it possible to install a.

Reference numeral 4 designates a bearing in which a split bearing outer ring 4c is attached to a pair of inner bearing rings 4a with balls 4b interposed between a pair of inner bearing rings 4a which are attached to the circumcision rod 1 at intervals. The circumcision rod 1 further includes a split rotary cylinder body 7 with a bearing outer ring.
are bonded with a flange joint 8.

Reference numeral 9 denotes a rotation suppressing blade which is provided on such a rotary cylinder 7 and protrudes along the longitudinal direction of the rod, and is formed to be slightly longer than the radius of the circumcised hole, and is cut into the wall surface 10 of the hole to prevent the rotation cylinder in the split hole. Body 7 is prevented from rotating.

Further, reference numeral 11 denotes a guide blade provided protruding from the rotary cylinder 7 along the longitudinal direction of the rod, and a locking portion 12 is provided at the tip thereof.

Also, 13 is an existing pile, and next to this is the next pile 13.
A guide rail 14 along the longitudinal direction of the pile is provided on the side surface of the pile on the side where the pile 13' is driven, and has a structure that allows the engaging portion 12 to engage in the horizontal direction when driving the pile 13'. The construction method of the present invention is carried out as follows using the above-mentioned excavation equipment. First, place the pile 1 on the top of the existing pile 13 and on the side of the pile driving side.
A stand vibrator 15 that surrounds the drilling location of 3" is driven in with a pipe hammer (see Figure a). Next, insert the drilling rod 1 into this stand vibe 15, and insert the rod 1 on the side of the drilling rod. After the locking portion 12 along the longitudinal direction is engaged with the guide rail 14, the drilling rod 1 is rotated and lowered (see Figure b).The guide rail 14 is also cleaned with a water jet if necessary. This improves the sliding of the locking part 12.At this time, since the guide rail 14 has a locking part guiding function, drilling is performed using the existing pile 13 as a guide.After drilling to the support layer, the drilling rod 1
(see figure c). Next, a pile 13'' is built into the hole 16 using the guide rail 14 as a guide (see Figure d), and the stand vibrator 15 is removed from the existing shaft 13 (see Figure e).
If the above process is repeated using newly driven piles (pile 13'' in the figure) as existing piles, earth retaining etc. can be constructed with continuous piles.The stand vibe 15 used in this invention construction method is , as shown in Figures 4 to 6, the existing pile 1
Place the guide rail 14 on the upper side of 3 and follow the guide rail 14.
Book guide rails 17 are arranged side by side, and engaging portions 18 are provided on parallel side edges formed by notching the stand vibe side wall along the longitudinal direction of the stake up to near the upper end, and these are respectively engaged with the guide rails 17. As a result, it is attached to the top of the existing pile 13. Since this invention has the above configuration, it has the following effects. It can be effective.

(1) Since the method involves first drilling a hole using the existing pile as a guide, and then erecting the pile into the hole, the pile is placed parallel to and adjacent to the existing pile at a certain interval, and the noise generated is extremely low. , pile driving can be done reliably. This also prevents mutual damage to existing piles and drilling bits.

(2) A method of attaching a stand vibrator to the top of the existing pile and the side surface on the pile driving side to surround the pile driving area to prevent the hole from collapsing and to use it as a scaffold for erecting the hole rod and piles. Therefore, the positioning of the pile driving location and the erection of rods and piles can be done easily and quickly, thus improving the efficiency of pile driving.

``(3) A rotary cylindrical body with a drilling rod that rotates up and down on the existing pile,
Since the hole can be drilled while obtaining the guiding action of the locking portion of the guide rail by connecting through the locking portion and the guide rail, the drilling can be carried out reliably.

(4) In addition, rotation suppressing blades are provided protruding from the rotating cylinder and bite into the drilled wall surface to prevent rotation of the rotating cylinder, thereby preventing the tip of the rod from wobbling around the guide rail. This makes it possible to more reliably guide the hole drilling by the engaging portion guide of the guide rail.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view showing the device of the invention in partial cross section, FIG. 2 is a cross-sectional view taken along line A to A in FIG. 4 is an enlarged front view of the main part of FIG. 3, and FIGS. 5 and 6 are sectional views taken along lines B and C in FIG. 4. 1...Drilling rod, 2...Tri-wing bit, 3...Mounting flange, 4...Bearing, 5...
...Flange, 6...Connecting rib body, 7...
...Rotating cylinder, 8...Flange joint, 9...
...Rotation suppression blade, 10...Wall surface, 11...Guide wing, 12...Locking part, 13...Existing pile, 13''...Pile, 14...Guide rail, 1
5... Stand vibe, 16... Hole, 17
...Guide rail, 18...Engagement part.

Claims (1)

[Claims] 1. Prior to drilling holes and erecting piles, first attach a stand pipe that surrounds the pile driving point to the top of the already driven pile and the side of the pile driving side, and use this stand pipe to prevent the hole opening from collapsing and to protect the hole drilling rod and pile. Next, a rotary cylindrical body equipped with an engaging part along the longitudinal direction of the rod is attached to the drilling rod having a tip pit so as to be rotatable so as not to move in the longitudinal direction of the rod. Using an excavator with rotation suppression blades protruding along the rod longitudinal direction on the side surface of the rotary cylinder so as to bite into the drilled wall surface, a guide along the pile longitudinal direction on the pile driving side side surface of the existing pile is used. Engaging the engaging portion of the rotary cylinder with the rail, drilling a hole in the ground adjacent to the existing pile using the existing pile as a guide, and then erecting the pile into the hole. A distinctive pile driving method.