JPS58110756A - Apparatus for preventing vibration of concrete - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION When pouring concrete, the most important thing is to pour solid concrete without air bubbles.

Generally, when pouring underwater concrete, a tremie tube is used, but when the pouring depth reaches a depth of 1kb, it is impossible to use a vibrator, and many air bubbles occur in the poured concrete.

The strength of such concrete decreases due to the presence of air bubbles, the adhesion to the reinforcing bars decreases, concrete clogging occurs in the tremie pipe, and a balanced difference in hardening occurs at concrete joints. In the case of cast-in-place concrete, there are drawbacks such as the reinforcing bars coming together when the tremie pipe is pulled out.

The present invention has been proposed to eliminate these drawbacks, and involves installing a vibration device at the tip of a tremie pipe for concrete pouring, and vibrating the poured concrete using the vibration device. This is a book about a concrete vibratory compaction device that is configured to perform compaction.

In the present invention, as described above, since the excitation device is built into the tip of the tremie tube, the tremie tube is inserted into a hole drilled in the ground with a reinforcing bar cage inserted into the hole. When concrete is poured into the prepared hole through the concrete and the vibration device installed at the tip of the concrete is driven, vibrations are imparted to the poured concrete, air bubbles in the concrete are floated upward, and the concrete is It will be tightly compacted and concrete will be poured. In this way, when concrete is continuously poured into the prepared hole and vibration is applied, the hardening time of the poured concrete that has already begun to harden is extended, and even and homogeneous concrete is poured at the concrete pouring joint. That will happen.

In this way, when the poured concrete in the prepared hole is tightly compacted, the adhesion force between the concrete and the reinforcing bars increases,
The horizontal vector of reinforcing bars when moving or pulling out a train pipe,
This prevents co-increase.

The present invention will be described below with reference to the illustrated embodiments.

(1) is a tremie tube, and a chisel ibrator (3) is installed at each predetermined position in a ring cavity (2) provided on the outer periphery of the tip of the tremie tube, and is securely fixed at the corresponding position by a mounting bracket (4). .

Note that (5) in the figure is a cap tire cord connected to the chisel ibrator (3)K and led to the power supply device (6)K on the ground.

After drilling a hole (G) in the ground with an excavator, a reinforcing bar cage (B) is erected inside the hole, and then a tremie pipe (1) is inserted.

Next, concrete 0 is poured into the hole (G) through the same tremie pipe (1), and the pipe lake (3)
is activated to impart vibration to the poured concrete 0, causing the air bubbles in the concrete 0 to float upward and eliminate them, thus ensuring that dense concrete 0 is placed. Furthermore, when concrete 0 is continued to be poured, the curing time of the concrete 0, which has already begun to harden, is re-vibrated by the chisel ibrator (3), and the curing time is extended, and even and homogeneous concrete 0 is poured at the joint location. That will happen.

When the poured concrete 0 is tightly compacted in this way, the adhesion force with the reinforcing bars (1) increases, and when the tremie pipe (1) is moved or pulled out, the reinforcing bars often slip or cross over, which often occurs with conventional construction methods. is prevented.

Thus, according to this device, air bubbles in concrete cast by a tremie tube, which were difficult to eliminate in the past, can be effectively eliminated by the vibration action of the vibrator (3) installed at the tip of the tremie tube (1). , tightly compacted,
It is possible to place high-strength concrete.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing a state of concrete placement by an embodiment of the vibration compaction device for concrete according to the present invention;
FIG. 2 is a cross-sectional plan view of the distal end of the device. (13...Toremi tube, (3)...Vibrator agent, 2 patent attorneys and non-Kaihon important documents)

Claims (1)

[Claims] 1. A concrete vibratory compaction device, characterized in that a vibrating device is installed at the tip of a tremie pipe for concrete pouring, and the vibrating device vibrates and compacts poured concrete.