JPH0694563A - Method and apparatus for detecting leak of water steel pipe sheet pile joint part - Google Patents

Abstract

PURPOSE:To certainly detect the leak of water from the joint part of a steel pipe sheet pile within a short time without relying on the visual observation and examination by touch of a diver CONSTITUTION:A traveling truck 22 having a lift truck 32 received therein is allowed to be self-traveled on a rail 20 to be stopped at the joint part 14 of a steel pipe sheet pile 10. Next, a jack 26 is operated to allow a guide 24 to fall and a winch 36 is driven to allow the lift truck 32 to rise and fall and the presence of the leak of water from the joint part 14 and the leak amt. of water are continuously detected over the range from the surface of the sea to the bottom of the sea by a flow rate detector 30. The data of the leak amt. and leak position (depth) of water detected by the flow rate detector 30 are sent to the operation and control panel 50 mounted the traveling truck 22 to be analyzed. Further, the operation control of the traveling and stop of the traveling truck 22 and the rising and falling of the lift truck 32 is also synthetically performed by the command of the operation and control panel 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting water leakage from a joint portion of a steel pipe sheet pile and a water leakage detection device.

[0002]

2. Description of the Related Art For example, in a reclamation work in a coastal area, a temporary cutoff with a steel pipe sheet pile is performed when constructing a revetment. Steel pipe sheet pile joint methods include pipe-pipe type,
Pipe-T type, etc. are known and all are 30-35.
Although a slit of about mm is cut and the slits are connected through the slit, the joint itself has no waterproofness.

Therefore, it is necessary to detect water leakage from the joint portion of the steel pipe sheet pile prior to the drainage work. FIG. 5: is a conceptual diagram which shows the conventional water leak detection work, and when draining with the pump 12 from the area temporarily cut off with the steel pipe sheet pile 10 (the same figure (a)), if the processing of the joint part 14 is bad, water leak will occur. Therefore, the leakage of water is detected by visual inspection and palpation of the diver 16 ((b) of the same figure) ((c) of the same figure).

The above-mentioned water leakage detection work is an important factor that affects the construction period of the drainage work, but generally the visibility in the sea is very poor, and it is easy to be restricted by the weather and diving time. Was also desired to be improved.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for surely detecting water leakage from a joint portion of a steel pipe sheet pile in a short time without relying on visual inspection and palpation work of a diver, and is most suitable for the detection work. A water leak detection device is provided.

[0006]

The water leakage detecting method of the present invention is to detect water leakage from a joint portion of a steel pipe sheet pile by moving a flow rate detector close to the joint portion.

Further, the water leakage detection device of the present invention comprises a carriage capable of traveling on the top end of a steel pipe sheet pile, and a lifting carriage equipped with a flow rate detector. The lifting carriage suspends a wire or the like from the traveling carriage. It is characterized in that it can be lifted up and down along the joint portion of the steel pipe sheet pile by being suspended by a tool.

[0008]

EXAMPLES The present invention will be specifically described below with reference to preferred examples. FIG. 1 shows a front view (the same figure (b)) and a side view (the same figure (a)) of the device of the present invention during water leakage detection work, in which a rail 20 is laid at the top end of the steel pipe sheet pile 10. A traveling carriage 22 is mounted on the rail 20.

A guide 2 is provided at a substantially central portion of the traveling carriage 22.
Lifting truck 3 in which 4 is provided vertically and the flow rate detector 30 is mounted
2 is stored in the guide 24. As the flow rate detector 30,
A known one such as a submersible type electromagnetic flow meter, an ultrasonic fluid flow meter, a propeller type (turbine type) flow meter can be adopted.

Reference numeral 26 is a jack provided for moving the guide 24 up and down, and when the traveling carriage 22 is traveling,
This is to prevent the guide 24 from hitting the sleepers 21 supporting the rails 20. In FIG. 1 (b),
Reference numerals 27, 28, and 29 are a cable reel for a flow rate detector, a cable reel for a power supply, and a hydraulic hose reel, respectively.

The lifting carriage 32 is suspended by a wire 34, and the other end of the wire 34 is connected to a winch 36 fixed on the traveling carriage 22. This will be described with reference to an enlarged side view of the lift truck 32 shown in FIG.
Reference numeral 8 denotes an L-shaped arm, one end of which is rotatably connected to the upper front part of the lift truck 32 by a support shaft 38a.
The lower end of the wire 34 is connected via a suspending metal 39 rotatably connected to a support shaft 38b of the bent portion of the arm 38.

A counterweight 40 having an appropriate weight is attached to the other end of the arm 38 via a support shaft 38c to prevent the wheels 33 of the lift truck 32 from being lifted, as shown in FIG. The lift truck 32 is vertically movable along the outer peripheral surface of the steel pipe sheet pile 10. FIG. 2B is a front view of the counterweight 40 viewed from the direction B in FIG. 2A, in which the cylindrical counterweight 40 has the arm 38,
It is shown rotatably supported at 38.

A jack 42 is rotatably provided at the center of the front of the lift truck 32 by a support shaft 42a provided in the middle thereof. The movable lower end of the jack 42 has a support shaft 31.
Via a, it is rotatably connected to the rear end of a support 31 for attaching the flow rate detector 30 to the lift truck 32,
Moreover, the front end of the support 31 is rotatably connected to the lift truck 32 by a support shaft 31b. Therefore, FIG.
As shown in (a), the mounting angle of the flow rate detector 30 with respect to the lift truck 32 can be adjusted by expanding and contracting the jack 42, which facilitates downward detection on the seabed.

FIG. 4 is a detailed sectional view of the lower end portion of the lift truck 32. A stopper 44 having a slight vertical stroke S is horizontally arranged. In addition, a proximity switch 46 is juxtaposed to the lower end of the lift truck 32, and
On the upper surface of 4, the dog 4 is opposed to the proximity switch 46.
I have attached 7.

The amount of water leakage detected by the flow rate detector 30,
The data such as the position (depth) is sent to the operation / control panel 50 mounted on the traveling vehicle 22 and analyzed. Further, the operation / stop of the traveling carriage 22 and the operation control such as the raising / lowering of the lifting carriage 32 are also comprehensively performed by the instruction of the operation / control panel 50.

Next, the work of detecting water leakage using the above-mentioned detection device will be described. First, the traveling carriage 22 accommodating the lifting carriage 32 is self-propelled and stopped at the joint portion 14 of the steel pipe sheet pile 10. Next, after operating the jack 26 to lower the guide 24, the winch 36 is driven to raise and lower the lift truck 32, and the flow rate detector 30 detects whether or not there is water leakage from the joint portion 14 and the amount of water leakage. , From the sea surface to the seabed,
Detect continuously.

When the lift truck 32 descends along the outer peripheral surface of the steel pipe sheet pile 10 and reaches the seabed, the stopper 44 lands on the seabed to protect the flow rate detector 30. Further, at this time, the stopper 44 is used for the lift truck 32.
When the distance δ between the proximity switch 46 and the dog 47 reaches the sensitive distance of the proximity switch 46, a detection signal is sent to the operation / control panel 50. In this way, it is possible to know on the sea that the lift truck 32 has reached the bottom of the sea.

When the work of detecting the joint portion 14 is completed,
After the lift truck 32 is pulled up and stored in the guide 24 of the traveling carriage 22, the jack 26 is operated to lift the guide 24, and the traveling carriage 22 is made to travel to the next joint portion 14 again, and the same detection work as above is performed. repeat.

[0019]

According to the method of detecting water leakage from a steel pipe sheet pile joint according to the present invention, while diving work by a diver is not necessary, water leakage can be detected by only one operator, and labor is saved. And the work time can be shortened. Furthermore, the time required for the detection work can be predicted, which is extremely useful for process control.

Further, according to the water leak detection device of the present invention, the amount of water leaked from the joint and the position (depth) data can be detected quantitatively and reliably in a short time.

The present invention, in addition to the above-mentioned seaside landfill construction,
It can be widely used for leak detection work from joints when shutting off with steel pipe sheet pile, such as revetment repair work on rivers and coasts.

[Brief description of drawings]

1 (a) is a vertical side view of a water leakage detection device cut along the line AA in FIG. 1 (b), and FIG.
[Fig. 2] is a vertical sectional front view cut along the line BB in Fig. 1 (a).

2A is an enlarged side view showing a lift truck 32, and FIG. 2B is a front view of a counterweight 40 seen from the direction B in FIG. 2A. .

3 is a cross-sectional plan view taken along a line III-III in FIG. 1 and enlarged.

FIG. 4 is a detailed cross-sectional view of a lower end portion of a lift truck.

FIG. 5 is a conceptual diagram showing a conventional water leak detection work.

[Explanation of symbols]

 10 Steel Pipe Sheet Pile 14 Joint Part 22 Traveling Carriage 30 Flow Detector 32 Lifting Carriage 34 Wire 40 Counterweight 50 Operation / Control Panel

Claims (2)

[Claims] 1. A method for detecting water leakage at a joint portion of a steel pipe sheet pile by moving the flow rate detector in close proximity to the joint portion. 2. A steel truck sheet pile comprising a carriage capable of traveling on the top end of the steel pipe sheet pile, and a lift truck equipped with a flow rate detector, the lift truck being suspended from the traveling carriage by a suspending tool, and a joint portion of the steel pipe sheet pile. Leakage detection device for steel pipe sheet pile joints that can be moved up and down along.