JPH1193164A - Rotation drive concrete pile with end steel pipe cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method wherein environment pollution such as noise and vibration produced when a concrete pile is driven into the ground can be minimized and industrial wastes are not produced so that underground water is not contaminated. SOLUTION: In the rotation-drive concrete pile, an end steel pipe cap, in which a helical vane (b), excavation blades (c), and a recess (d) for driving a rotary main axis bar are provided on a steel pipe (a), is mounted integrally to the forward end of a concrete pipe 1. And the rotary main axis bar is inserted into the recess (d) of the cap to rotate the forward end of the pipe, causing the whole pile to rotate, whereby the torsion fracture of the pile can be prevented and the pile can be rotated and driven into the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation concrete pile for civil engineering construction.

[0002]

2. Description of the Related Art Concrete pile driving is roughly divided into hammer, hydraulic pressure, press-fitting with cement milk, and a certified construction method.

[0003]

[Problems to be Solved by the Invention] The construction method using a hammer and a hydraulic pressure has pollution such as noise and vibration. The construction method such as injection with cement milk uses a fixed solution around the pile.Therefore, pollutants are left around the piles buried underground, leaving the groundwater polluted. Must be processed.

[0004]

A tip cap (2) is attached to the tip of a concrete pile, and a square steel rotating spindle (3) is inserted into a concave portion (d) of the tip cap into an integrated pile, and rotated into a tip steel pipe cap. The method is a method of applying a force and rotating and press-fitting to reach a predetermined support layer, so there is little noise, vibration, etc., and no underground nature is destroyed because a pile circumference fixing liquid is not used.

[0005]

[Function] Since the tip is a spiral pile, it is possible to reach a predetermined support layer by press-fitting while rotating.

[0006]

【Example】

[Figure 1] Explanation (A) Drill down to the pile support layer using the auger attached to the pile driver as necessary. (B) When the pile is set up, cement milk and fixing liquid around the pile are not used at this time, so the side wall of the pile insertion hole collapses and cannot be pressed into the specified position. (C) Therefore, prepare a rotating spindle (3) made of square steel in the concrete pile of the present invention. (D) Attach the square steel rotating spindle rod, which is the method of the present invention, to the part (d) of the tip steel pipe cap (2). (E) Rotate the tip of the steel pipe cap and drive the concrete pile body into the planned support layer while rotating and press-fitting.

According to the present invention, since no fixing solution around the pile is used, there is no need to treat the industrial waste with no contaminating groundwater and the remaining soil. By changing the diameter of the tip steel pipe cap, the tip support force can be increased. Low noise and vibration due to rotary press fit.

[Brief description of the drawings]

FIG. 1 is a view showing a construction procedure of a pile driving method.

FIG. 2 is a view showing a concrete pile to which a tip steel pipe cap of the present invention is attached.

FIG. 3 is a longitudinal sectional view of a concrete pile to which a tip steel pipe cap of the present invention is attached. (B) shows the mounting of the rotating spindle in (A).

FIG. 4 is an enlarged view (A) of the tip steel pipe cap portion of the present invention, and FIG.

FIG. 5 is a longitudinal sectional view of a tip steel pipe cap portion of the present invention, (A) is an expanded bottom pile (B) is an ordinary pile.

[Explanation of symbols]

 (1) Concrete pile (2) Tip steel pipe cap (3) Square steel rotating spindle rod (A) Steel pipe pipe (B) Spiral blade (C) Drilling blade (D) Rotating spindle rod interlocking recess

Claims (2)

[Claims] 1. A spiral blade (b) is attached to a steel pipe (a).
A steel pipe cap (2) composed of an excavating blade (c) and a concave part (d) for interlocking a rotating spindle rod is used to concrete pile (1)
Of concrete pile pile attached to the tip of a concrete pile. 2. A method of inserting a rotating spindle rod (3) made of square steel into a concave portion (d) of a tip cap (2), rotating the tip of the pile and driving the entire pile into the ground by rotary press-fitting. .