JPS60181422A - Mucking device for pneumatic caisson process - Google Patents

Abstract

PURPOSE:To reduce construction cost, by a method wherein a mucking conveying device is mounted to the lower part of a hopper located in a material lock, a winder is hung down from a movable travelling device, and an earth bucket is hung down from the winder. CONSTITUTION:With a winder 13 operated, a clamshell bucket 14 is hung down to a working chamber 2 to load muck, after which the bucket 14 is hoisted up to the upper limit position of a mucking lock 10. With a traveling device 12 driven, the bucket 14 is horizontally moved along a rail 18 and is brought to a stop in a position above the hopper 19, the bucket 14 is opened to charge muck into the hopper 19. Subsequent to driving of a rotary valve 22 and opening of a slide gate 21, a screw conveyor 20 is operated, the muck is continuously discharged, and is thrown into an earth hopper 7 through a belt conveyor 23 to be stored therein.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sludge removal device for discharging excavated sludge to the atmospheric pressure side in the pneumatic caisson construction method.

The pneumatic caisson method has been used for a long time to construct sill foundations and underground structures.

In this construction method, the soil was removed by lifting an earth bucket from the pressurized work chamber at the bottom of the cane using a crane, transporting it in the air to a ground-mounted soil hopper, and removing the soil. Since the earth packet is transferred to the atmospheric pressure side by opening/closing the material lock door and supplying/exhausting the material, the time the earth packet remains stationary is long, leading to a decrease in work efficiency for removing sludge. In addition, this method requires a lock tender in addition to the crane driver, and even if automated operation is adopted, complicated movements are required to pass the earth bucket through the material lock. The disadvantage was that it did not lead to a reduction in V time. The purpose of this invention is to solve the above-mentioned drawbacks and provide a device that can efficiently remove the waste, and it lifts the waste without taking the ground packet in and out of the material lock. The material lock is characterized in that the waste is continuously discharged to the atmospheric pressure side by a waste discharge device provided inside the material lock.

The details will be explained below with reference to the attached drawings.

Before entering into the explanation of the present invention, the conventional method of removing slippage will be explained first.
This will be explained with the help of a diagram. The ground is excavated in the working chamber 2, which is the bottom of the caisson 1, and the ground is put into the earth packet 3.
It is lifted by a crane 4 such as a tripod derrick or skater or jib crane installed on the ground, and is moved from the pressure side A to the atmospheric pressure side B by passing through a material lock 6 mounted on the top of the caisson shaft 5,
The soil is directly discharged into the earth and sand hopper 7 installed on the ground. To explain in detail the process of passing the earth packet 3 through the material lock 6, the earth packet 3 is temporarily stopped inside the material lock 6, the lower door 8 is closed, and the pressure inside the material lock 6 is returned to atmospheric pressure. This was done by opening the door 9 and hoisting the earth packet 3 up again.

Next, the present invention will be explained with reference to FIG. A slip removal lock 1o according to the present invention is mounted on the top part of a caisson shaft 5 installed vertically inside the caisson 1.This slip removal lock 1o has an earth lifting device, an earth removal device, and a conventional material lock. It consists of upper and lower doors, air supply and exhaust equipment, and a locking device. First, the soil lifting device has one or more inner rails 11 installed on the ceiling surface or inner wall of the slip removal lock 10. A traveling device 12 consisting of an idler wheel and a driving wheel is engaged with the inner rail 11, and the vehicle can freely run along the inner rail 11. A hoisting machine 13 for lifting the earth packet 3 is fixed to the traveling device 12 via an underframe. Furthermore, the traveling device 12 can also be equipped with a cable reel 15, which is necessary if the ground packet 3 is replaced by a hydraulic taram shell bucket 14. Hoist 13 and hydraulic clamshell bucket 14
Power is supplied to the power supply by a power cable reel 16 installed horizontally on the wall of the scraper 10. Therefore, earth packet 3 or hydraulic clamshell bucket 1
4 is free to move vertically from the inside of the shear removal lock 10 to the working chamber 2 of the caisson 1, remove shear, and move horizontally within the lock 10. In addition, lock 1 for removing ground packet 3, etc.
0 When the upper door 17 provided on the wall of the shear removal lock 10 is opened, the shear removal lock 1 can be moved outside.
The outer rail 18 and the inner rail 11 are connected to each other, and the traveling device 12 can travel toward the outside of the slip removal lock 10. Next, the soil removal device has a hopper 19 for temporarily storing the soil next to the connection port with the caisson shaft 5 provided in the soil removal lock 10, and the bottom opening of this hopper 19 is provided with a hopper 19 for transporting the soil. A screw conveyor 20 is installed. A slide gate 21 is provided at the discharge port of the screw conveyor 20 to block the outflow of waste and air, and a rotary rotor is provided at the exit of the slide gate 21 to quantify the amount of soil discharged and to reduce air blow. The valve 22 is installed. Since the earth removal device is constructed by combining machines in this manner, it is possible to easily discharge the waste in the hopper 19 continuously to the atmospheric pressure side B in a sealed state. The waste discharged from the rotary valve 22 may be transported to the earth and sand hopper 7 installed on the ground via a belt conveyor 23 that has been prepared in advance. Finally, regarding the lock device, it is equipped with the same equipment as the conventional material lock 6, but in the shear removal lock 1θ according to the present invention, the upper door 1γ is provided perpendicularly to the wall surface of the shear removal lock 10, Hoisting machine 1 constituting the above-mentioned soil lifting device
It has an opening size that allows the entirety of the ground packet 3 or the hydraulic clamshell bucket 14 to pass through. The purpose of this upper door 17 is to take out the earth packet 3, etc., and move it to the outside of the lock 10, since it is difficult to pass through the earth removal device when the debris is a large lump such as a boulder or boulder. This is for directly discharging soil onto the conveyor 23. Other uses include access for workers and transportation of materials and equipment. A frame 24 is fixed to the caisson 1 to stably support the slip lock 10 provided with these various devices and prevent overload from being applied to the caisson shaft 5.

Next, the operation of the shear removing device according to the present invention will be explained.

In FIG. 3, the hoisting machine 13 is remotely controlled to open and close to load the scraps, and the hydraulic clamshell packet 14b loaded with scraps is hoisted up to the upper limit position of the scraper lock 10. Next, the hopper 1 is moved horizontally by the drive of the traveling device 12.
Hydraulic clamshell packet 14C by stopping above 9.
is opened and the waste is put into the hopper 19. The empty hydraulic taram shell packet 14G is lowered into the work chamber 2 again, the above-mentioned operation is repeated, and the waste is lifted into the hopper 19 inches. To discharge the waste in the hopper 19 to the atmospheric pressure side B, after driving the rotary valve 22 and opening the slide gate 21, the screw conveyor 20 is operated to continuously discharge the waste in a sealed state. The soil is fed into the earth and sand hopper 7 for storage. When the sludge in the hopper 19 approaches empty, it is sufficient to stop each machine that constitutes the soil removal device and wait for the sludge to accumulate in the hopper 19 again. If the conventional grounding packet 3 is used instead of the hydraulic clamshell bucket 14, the bucket replacement work is done manually in the work room 2, and the slip-out lock 1 is used.
An automatic packet reversing device (not shown) may be provided on the hopper 19 in the 0th section. To prevent the caisson 1 from sinking, adding the caisson shaft 5 and the frame 24 can be done in the same manner as in the conventional method. Alternatively, a climbing device equipped with a vertical jack may be installed externally on the pedestal 24 to facilitate the installation work. In Fig. 4, in order to further improve the efficiency of removing waste, the height of the caisson shaft 5 is minimized, and the vertical transport of waste is carried out by a vertical conveyor 25. This is a method of automatically increasing the lifting height of the vertical conveyor 24.

As explained above, the shear removal device according to the present invention has the following effects compared to the conventional shear removal method.

(1) Since the earth packet only moves in pressure circles,
There is no need to open or close the lock door, and no lock tender is required.

(2) Lifting of waste in a pressurized air and transporting of waste using air pressure are performed by independent devices, improving work efficiency.

(3) Since there is no need to open or close a lock door, it is easy to use an automated driving system.

(4) Since the amount of shear removal per one shear removal lock increases, the number of equipment can be reduced.

Since the present invention has the above-mentioned effects, it can be used in the pneumatic caisson construction method, which will continue to increase in the future.
In place of the current sludge removal method, which has lagged behind the improvement in excavation capacity due to excavation mechanization, the sludge removal device according to the present invention not only improves sludge removal ability but also makes it possible to systemize excavation and sludge removal. Therefore, there are significant advantages such as reduced construction costs, shortened construction period, and improved safety.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of an embodiment of a conventional shear removal device. FIG. 2 is a cross-sectional side view of the shear remover according to the present invention, and FIGS. 3 and 4 are cross-sectional side views of embodiments of the shear remover according to the present invention. A...Pressure side B...Atmospheric pressure side 3...
... Earth packet 5 ... Caisson shaft 10 ... Slipping lock 11 ... Inner rail 15 ... Cable reel 17 ...
...Top door 18゜...Outer rail 19...
Hopper 20...Screw conveyor 21...Slide, gate 22...
... Rotary valve 23 ... Belt conveyor 24 ... Frame ￥, /I2] 2nd part 3rd item '$4 tai ゛

Claims (1)

[Claims] A hopper installed inside the material lock, a waste removal device consisting of a screw conveyor, a slide gate, and a rotary valve at the bottom of the hopper, and a traveling device that can be moved by engaging with a rail installed on the ceiling or inner wall of the material lock. A device for removing slippage in the pneumatic caisson construction method, which consists of a hoisting machine that is integrally suspended from the hoisting machine, and an earth bucket that is suspended from the hoisting machine.