JPH06306865A - Underwater placing device - Google Patents

Abstract

PURPOSE:To simplify the constitution of an underwater placing device by installing a magnet and a piece of packing in a tip opening part peripheral edge of a vertical pipe provided with a solidifying earth pressing-in auger to lee placed underwater, and having a steel plate cover piece attracted to the magnet. CONSTITUTION:A magnet 5 and watertight packing 6 are installed in a tip opening part of a vertical underwater placing pipe. In addition, a steel plate cover piece is opposedly installed in a tip of the vertical underwater placing pipe 1, and this cover piece is attracted to the magnet 5, whereby a tip part of the pipe 1 is closed. When the vertical underwater placing pipe 1 is precipitated underwater in this state intact, the cover piece is yet more strongly pressed to the pipe 1 under pressure, and thereby no water is penetrated into the underwater placing pipe 1 owing to the packing 6. Likewise when an auger 4 in the vertical underwater placing pipe 1 is driven and rotated and an underwater placing device is lifted upward as pressurizing a mass of solidifying earth downwards, the steel plate cover piece 9 is left behind on a water bottom, so that this solidifying earth is placed on the water bottom.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an underwater driving apparatus as disclosed in JP-A-3-17910 and JP-A-3-17911 relating to the invention of the present inventors. Is.

[0002]

2. Description of the Related Art Conventionally, underwater concrete or the like has been placed in water by free fall using a tremie pipe. In the case of underwater concrete, a large amount of separation inhibitor is contained,
Almost no separation occurs in free fall in water. However, in the case of dredged soil consisting mainly of sludge, the unit weight is light and it is necessary to press it into water forcibly to pour it. May separate and generate turbid water.

For this reason, a placing device was initially developed which has a press-fitting device inside and prevents water from entering the device until the placing. As shown in FIG. 5 and FIG. 6, the conventional underwater placing device is a double pipe of an inner cylinder a and an outer cylinder b. By moving the outer cylinder b up and down by an electric jack c, the inner cylinder a is moved. It is crimped to the supported cone cap d to prevent water from entering the inside of the driving device. In the figure, e is a motor for driving an auger in the inner cylinder a, f is a hopper of a setting device, and g is a hopper.
Is an outer cylinder holder.

[0004]

The conventional underwater driving device is expensive because the device is complicated, and the weight of the driving device is heavy because the pipe is a double inner / outer pipe. While the casting pipe is gradually pulled up during casting, the treated soil under the corn cap is disturbed when the pipe is pulled up. Further, when the driving device is pulled out after the driving is finished, the treated soil may be disturbed at the tip of the cone cap to pollute the water quality.

The present invention has been proposed in view of the problems of the above-mentioned prior art, and the object thereof is to simplify the structure and to prevent the generation of pollution at the time of pulling out the driving device. The point is to provide the installation device.

[0006]

In order to achieve the above-mentioned object, a submersible pouring apparatus according to the present invention is provided with a tip end opening of a vertical pipe in which a solidified treated earth auger for pouring into water is installed. A vertical underwater casting pipe having a magnet and packing mounted around the periphery thereof, and an iron plate lid piece attracted to the magnet in the underwater casting pipe.

According to a second aspect of the present invention, pressure sensors are arranged at least at two positions, a tip portion and an upper portion of the vertical underwater casting pipe.

[0008]

As described above, according to the present invention, the magnet and the packing are arranged around the tip opening of the vertical underwater casting pipe in which the auger for press-fitting the underwater casting material is installed. By attaching the iron plate lid piece to the tip opening of the underwater casting pipe, the underwater casting pipe is closed by the iron plate lid piece. When the vertical submersible pipe is submerged in this state, since the inside is empty, it is more strongly crimped to the vertical submersible pipe by the water pressure, and the watertight state of the vertical submerged pipe tip is maintained by the packing. The water is prevented from entering the pipe, and the watertight state in the placing device is maintained until the start of the solidified soil placing.

At the time of pouring the solidified treated soil, the lid plate made of iron plate is detached from the placing device by the placing pressure, so that the solidified treated soil can be placed in water without causing pollution. According to a second aspect of the present invention, the pressure in the underwater casting pipe is detected by not disposing the pressure sensors at least at two points on the tip and the upper portion of the vertical underwater casting pipe, so that the underwater casting material is made smooth. It can be placed in water.

[0010]

The present invention will be described below with reference to the illustrated embodiments. 1 is a vertical underwater placing pipe in the underwater placing device, 2 is a hopper, 3 is an auger 4 in the vertical underwater placing pipe 1.
A magnet 5 and a watertight packing 6 are provided at the tip opening of the vertical underwater casting pipe 1 by
Pressure sensors 7 are arranged at least at two locations, the tip and the top of the underwater casting pipe 1, so that the respective sensor portions are directed inside the pipe. Reference numeral 8 in the drawing is a tip end protective cover. (See FIG. 1) Then, as shown in FIG. 2A, an iron plate lid piece 9 is provided at the tip of the vertical underwater casting pipe 1, and the iron plate lid piece 9 is attracted to the magnet 5. As a result, the vertical underwater casting pipe 1 is closed and the vertical underwater casting pipe 1 is allowed to settle in the water in this state as shown in FIG. 2B. Since the inside is empty, the iron plate lid piece 9 is more strongly pressed against the vertical submersible casting pipe 1 by water pressure, and the packing 6 prevents water from entering the submersible casting pipe 1. (See FIG. 2C) In this state, as shown in FIG.
Is installed on the bottom of the water, and the underwater casting pipe 1 is filled with the solidified treated soil 10. At this time, the filling state of the solidified treated soil is monitored by the pressure sensor 7.

Next, as shown in FIG. 2 (e), the auger 4 inside the vertical underwater casting pipe 1 is driven to rotate to press the solidified treated soil 10 downward and raise the placing device as shown by an arrow. Since the solidified treated soil 10 is heavier than water, the downward pressure of the solidified treated soil 10 is stronger than the pressure force of the iron plate lid piece 9 due to water pressure, and the iron sheet lid piece 9 is left on the water bottom as it is and solidified. The treated soil 10 is placed on the bottom of the water. While the solidified soil 10 is being cast, the tip of the vertical submersible pipe 1 is always buried in the solidified soil 10 being cast.

At the end of the pouring, the treated soil in the vertical underwater pouring pipe 1 is taken out and then pulled up. Vertical underwater casting pipe 1
Since the tip of is has a tubular shape, the water in the upper part does not enter during extraction and the treated soil is not disturbed, and no pollution occurs during extraction.

[0013]

INDUSTRIAL APPLICABILITY As described above, the underwater placing apparatus according to the present invention mounts the magnet and the packing on the periphery of the tip opening of the vertical pipe which is placed in the water and in which the solidification-treated earth press-fitting auger is installed. Since it is composed of a vertical underwater casting pipe and an iron plate lid piece, the configuration of the underwater casting device is simplified,
The weight is reduced, and it is possible to prevent pollution when the casting pipe is pulled out.

According to a second aspect of the present invention, pressure sensors are provided at least at two points, namely, at the tip end and the upper portion of the vertical underwater placing pipe of the underwater placing device, so that the vertical underwater placing pipe is solidified. The filling status of soil can be monitored.

[Brief description of drawings]

FIG. 1 is an enlarged vertical sectional view showing a tip portion of a vertical underwater placing pipe in an embodiment of the underwater placing device according to the present invention.

2 (a), (b), (c), (d), (e), and (f) are vertical cross-sectional views showing the steps of a method for underwater setting of solidified treated soil using the apparatus of the present invention.

FIG. 3 is a front view of the underwater driving apparatus according to the present invention.

FIG. 4 is a side view of FIG.

FIG. 5 is a front view of a conventional device.

FIG. 6 is a side view of FIG.

[Explanation of symbols]

 1 Vertical submersible pipe 2 Hopper 3 Motor for driving auger 4 Auger 5 Magnet 6 Watertight packing 7 Pressure sensor 8 Tip protection cover 9 Iron plate lid 10 Solidified soil

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yasutaka Nakai 4-6-15 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd.

Claims (2)

[Claims] 1. A vertical submersible casting pipe in which a magnet and a packing are mounted on the periphery of the tip opening of a vertical pipe in which a solidification-treated soil press-fitting auger is placed, which is placed in water. An underwater casting device comprising an iron plate lid piece that is attracted to the magnet in the casting pipe. 2. The underwater placing apparatus according to claim 1, wherein pressure sensors are provided at least at two positions, a tip portion and an upper portion of the vertical underwater placing pipe.