JPH0463194B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to so-called sludge removal equipment at a caisson construction site, or equipment for charging earth and sand excavated in a caisson into an earth and sand receiving hopper.

[Prior art] In Fig. 4, the "neumatic caisson"
The structure of a construction site is shown using a pressurized caisson known as

This caisson has a frame 3 having a concrete frame side wall 1 and a working chamber ceiling 2, and a cutting edge 4 is provided around the lower part of the working chamber ceiling 2.
The space surrounded by the workroom ceiling 2 and the cutting edge becomes the workroom 5, and inside it, workers M, M...
are engaged in excavation work. Penetrating the workroom ceiling 2 are a workroom air supply pipe 6 and a blow pipe 7. The inside of the frame 3 is filled with 1W of water as a load.

A work room ceiling hanging girder 8 and a special shaft 9 are connected to the work room ceiling 2. This special shaft 9 has a hollow structure, and a caisson bucket 10 passes through the interior thereof. An air lock 11 is provided above the special shaft 9. The air pipe 12 is in the airlock 11.
and an exhaust pipe 13 are connected, and the air supply pipe 12
extends from an air conditioning room (not shown). A landing 14 is provided around the airlock 11, on which workers M ^- and M ^- are working.

Note that GL indicates the ground surface, WL indicates the groundwater level, and 15 indicates a climbing ladder provided inside the special shaft 9.

In the prior art as shown in FIG. 4, when discharging the excavated earth and sand, the earth and sand excavated by worker M (submerged boxer) in the work chamber 5 of the caisson is
It is housed in a caisson bucket 10. The caisson bucket 10 containing earth and sand is suspended by a wire rope 16 that is lowered from a heavy machine (not shown) installed outside the caisson, such as a crawler crane or a tripod derrick, through an aerodynamics 11 and a special shaft 9. , is hoisted out of the caisson by a winch (not shown). After hoisting the caisson outside, a rope for overturning the bucket is hooked to the lower part of the caisson bucket 10.
Next, by moving the heavy equipment, the caisson bucket 10 was moved above the earth and sand receiving hopper (not shown in Figure 4), and the winch was lowered to hook the bucket to the lower part of the caisson bucket 10, causing the bucket to fall over. Lower the caisson bucket until the rope is within reach of the worker. When the bucket overturning rope is pulled, the caisson bucket 10 rotates, and the earth and sand contained therein are thrown into the earth and sand receiving hopper. Here, if the site is narrow or there are two or more sets of aerodynamics, a skater or monorail is used instead of heavy machinery to dump the earth and sand stored in the caisson bucket into the earth receiving hopper.

However, since the caisson bucket 10 passes through the interior of the special shaft 9, no protrusions or the like can be formed on the side surfaces of the caisson bucket 10. Further, since the stability of the caisson bucket 10 is deteriorated, it is not possible to form a protrusion on the bottom of the caisson bucket. Therefore, it is not possible to attach an overturning rope or the like to the caisson bucket 10 in advance and suspend it inside the caisson to store earth and sand. Therefore, each time the caisson bucket is rolled up outside the caisson, the rope for overturning the bucket must be hooked onto the caisson bucket. The overturning rope must be removed from the caisson bucket each time the caisson bucket is suspended inside the caisson after soil has been added.

Furthermore, after moving the caisson bucket above the earth and sand receiving hopper, it is necessary to pull the rope for overturning the bucket in order to dump the earth and sand stored inside the caisson bucket.

For the above-mentioned reasons, in the prior art, the time required to discharge the earth and sand excavated in the caisson was long, and the labor required for this work was large.

[Object of the Invention] The present invention was created in view of the problems of the prior art described above, and provides an overturning method for overturning a caisson bucket, which can shorten the time for draining earth and sand, thereby saving labor and shortening the cycle time. It is an object of the present invention to provide a method and a caisson bucket overturning device.

[Structure of the Invention] The method for overturning a caisson bucket cart of the present invention includes:
In the method of overturning the caisson bucket containing soil in order to dump the excavated soil inside the caisson into the soil receiving hopper, there are two steps: lifting the caisson bucket containing soil to the upper part of the caisson, and horizontally moving the caisson bucket. a step of engaging an engaging member attached to the bottom of the caisson bucket via a connecting member with a receiving member attached to the earth and sand receiving hopper; and a step of lowering the caisson bucket to center the engaging member on the bottom of the caisson bucket. The process includes the step of rotating the caisson bucket.

Further, the caisson bucket overturning device of the present invention has the following features:
In a caisson bucket overturning device that overturns a caisson bucket containing earth and sand in order to dump earth and sand excavated in the caisson into an earth and sand receiving hopper, there is provided a means for raising and lowering the caisson bucket, and a means for horizontally moving the caisson bucket. an engaging member attached to the bottom of the caisson bucket via a connecting member, and a receiving member attached to the earth-receiving hopper for receiving said engaging member.

[Operations and Effects of the Invention] According to the present invention, the engaging member is attached to the bottom of the caisson bucket by the connecting member.
Therefore, when the caisson bucket cart passes through the special shaft of the caisson, the inner wall of the special shaft and the caisson bucket cart engagement member do not interfere, and the caisson bucket cart passes smoothly. Further, since the connecting member can be constructed of a chain or a string, the stability of the caisson bucket is not impaired when the caisson bucket is landed inside the caisson.

Based on these effects, the present invention eliminates the need for attaching or detaching the bucket overturning rope to the caisson bucket, and also eliminates the need for pulling the bucket overturning rope for dumping earth and sand. As a result, the work of putting earth and sand in (so-called work of removing dirt) can be omitted.

Further, according to the present invention, the earth and sand contained in the caisson bucket is inevitably thrown into the earth and sand receiving hopper by the movement and overturning (rotation) of the caisson bucket. Time decreases. In addition to this, according to the invention:
This makes it possible to completely automate the removal work.

[Preferred embodiment] As mentioned above, the connecting member can be a chain, a string, etc.
It is preferable to use a member that appropriately bends or curves to deform when the engaging member lands on the ground.

Further, when carrying out the present invention, it is preferable to install a dedicated gantry crane as a means for hoisting up or lowering the caisson bucket and moving it horizontally.

Furthermore, it is preferable that the bottom of the caisson bucket is raised so that the connecting member and the engaging member can be accommodated in the raised bottom. This is to improve the sitting position of the caisson bucket.

The engaging member is preferably a metal disk, and the receiving member is preferably configured in a generally π-shape. The receiving member is installed at an appropriate distance from the input port of the earth and sand receiving hopper, and the connecting member and the caisson bucket rotate around the metal disk to remove the earth and sand from inside the caisson bucket. Preferably, it is constructed so that it can be placed into a receiving hopper.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In FIG. 1, reference numeral 20 indicates a caisson bucket, and the caisson bucket 20 is a cylindrical steel bucket, the upper part of which is reinforced with a cylindrical iron plate. Caisson bucket 20 is wire rope 2
2, it is suspended from a portal crane 24. A moving member 2 is provided at the bottom of this portal crane 24.
6 and 26 are provided to allow the portal crane 24 to move horizontally as shown by arrow A. Note that the airlock 28 is located below the caisson bucket 20, and the earth and sand receiving hopper 30 is located on the left side of the caisson bucket 20.

An engaging member or metal disc 34 is attached to the bottom of the caisson bucket 20 via a connecting member or chain 32. This engaging member 34 is adapted to be received in a π-shaped (see FIG. 3) receiving member, that is, a metal disk receiver 36 attached to the earth and sand receiving hopper 30.

2 and 3 show the caisson bucket 20 and the earth and sand receiving hopper 30 in detail. A bucket pin 38 is formed at the upper edge of the caisson bucket 20, and the bucket pin 38 is connected to a string 40, which is connected to a clevis pin 42.
It is connected to the wire rope 22 via.

The procedure for putting the earth and sand contained in the caisson bucket 20 into the earth and sand receiving hopper 30 is as follows.

First, the aerobics 28 are moved by the gantry crane 24.
The engaging member 34 connects the caisson bucket 20 from below.
Wind it up until it is located slightly below the receiving member 36. Next, the portal crane 24 is horizontally moved to the left in FIG. 1 by the moving member 26, and the caisson bucket 20 is also horizontally moved as shown by arrow B in FIGS. 2 and 3. let The engaging member 34 engages the receiving member 36 at a position immediately preceding the position shown in FIG. When the wire rope 22 is unwound, the caisson bucket 20 and the connecting member 32 rotate about the engagement position 44 as shown by the position in FIG. When the caisson bucket 20 is tilted to a certain extent, the opening 46
Sediment is discharged downward.

To return the caisson bucket 20 to below the air lock 28 after discharging the earth and sand, the procedure described above can be reversed. That is, first, wire rope 2
2 and rotate the caisson bucket 20 in the order of , in FIG. Next, the gate type crane 24 is moved horizontally to the right in FIG.
is moved horizontally to above the aerodynamics 28.
At this time, the engaging member 34 comes out of the receiving member 36 due to the movement of the caisson bucket 20 to the right. Then, as shown in Fig. 1, the wire rope 2
By lowering the caisson bucket 20, the caisson bucket 20 is returned to below the air lock 28.

[summary] The effects of the present invention explained above are listed below.

(1) Even if an engaging member for overturning (rotation) is attached to the caisson bucket, there will be no hindrance to the excavation work inside the caisson and the operation inside the special shaft below the aerodynamics.

(2) By attaching the receiving member to the earth and sand receiving hopper and moving the caisson bucket horizontally, the engaging member hooks (engages), ensuring reliable operation.

(3) When the receiving member is hooked and the wire rope of the portal crane is lowered, the caisson bucket is reversed (rotated) and the earth and sand are automatically discharged, reducing the labor required for discharge work.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the arrangement of various members in an embodiment of the present invention, Fig. 2 is a front view showing details of the caisson bucket and the earth and sand receiving hopper, and Fig. 3 is a front view showing the details of the caisson bucket and the earth and sand receiving hopper. The plan view and FIG. 4 are cross-sectional front views for explaining the caisson construction site. 20...Caisson, 22...Wire rope, 2
4... Gate type crane, 28... Aerotsuku, 30
... Sediment receiving hopper, 32 ... Connection member, 34 ...
Engagement member, 36...receiving member.

Claims (1)

[Scope of Claims] 1. In a method of overturning a caisson bucket cart containing earth and sand in order to dump earth and sand excavated within the caisson into an earth and sand receiving hopper, the method includes the steps of lifting the caisson bucket cart containing earth and sand above the caisson; , a step of horizontally moving the caisson bucket, a step of engaging an engaging member attached to the bottom of the caisson bucket via a connecting member with a receiving member attached to the earth and sand receiving hopper, and lowering the caisson bucket. and rotating the caisson bucket cart around the engaging member. 2. In a caisson bucket overturning device that overturns a caisson bucket containing earth and sand in order to dump earth and sand excavated inside the caisson into an earth and sand receiving hopper,
means for raising and lowering the caisson bucket, means for horizontally moving the caisson bucket, an engaging member attached to the bottom of the caisson bucket via a connecting member, and a dirt receptacle for receiving the engaging member. A caisson bucket tipping device comprising a receiving member attached to a hopper.