JP2738505B2 - Pneumatic caisson method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic caisson method and, more particularly, to earth removal from a working room.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 11, excavated soil is loaded from a pneumatic caisson working chamber into a discharging bucket 40 in a working chamber C below a caisson A, and then is excavated by a winch 41. It is lifted and discharged to the atmosphere via a material lock 42. In this method, in order to improve the soil discharging efficiency, two earth discharging buckets 40 are used, and a submersible work 43 called bucket pushing is performing the work of suspending the bucket 40 in the compressed air. Therefore, this method cannot be applied to a deep caisson from the viewpoint of preventing decompression sickness.
Also, caisson excavators 4
4 and the like may collide with the submersible box 43.

As an alternative to the submersible box 43, an automatic loading device has been developed. However, in this device, a large-scale device is installed in the work room, so that the excavation work becomes difficult to that extent, and the time and labor for repair and inspection of the automatic loading device in the compressed air increase.

In recent years, as shown in FIG. 12, a method of picking up excavated soil D from a work chamber C using a telescopic clamshell 46 provided in a material shaft 45 has been proposed. However, in this method, the excavated soil D is inserted into the unloading bucket 47 so that the excavated soil D slides down the inclined pipe 48. It is expected that the soil removal efficiency will significantly decrease due to the adhesion.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a pneumatic caisson method for automatically and surely discharging excavated soil by eliminating work in the compressed air.

[0006]

According to the present invention, an upper door opening step of opening an upper door of a material lock, a clamshell inserting step of inserting a clamshell of a telescopic power shovel into the material lock, A gantry raising process for raising the positioning gantry, a positioning process for aligning the guide steel pipe of the power shovel with the positioning gantry, a child boom vertical holding process for keeping the child boom vertical according to the display of the vertical angle display indicator, and a material lock. An upper door closing step of closing the upper door, a pressurizing step of sealing the gap between the upper door and the tail steel pipe to pressurize the inside of the material lock, and opening a lower door of the material lock to extend the grandchild boom. The excavated soil grasping process of grasping the excavated soil collected immediately below with a clamshell and the clamshell Shrinking grandson boom to shrink the boom until it fits in Real Lock, depressurizing process to close the lower door and depressurize the inside of the material lock, seal loosening process to shrink the seal between the upper door and the tail steel pipe, and positioning It is characterized by including a gantry lowering step of lowering the gantry, and a child boom pulling out step of opening the upper door, pulling out the child boom out of the material lock and discharging the soil.

[0007]

According to the present invention, the telescopic clamshell is moved into and out of the working chamber under pressure through the material lock, and the excavated soil is reliably discharged.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of an apparatus for implementing the present invention.

This device comprises a telescopic excavator indicated by reference numeral 1 and a material lock indicated by reference numeral 20 which is provided on a slab B of a caisson A and into which a grandchild boom 5 of the excavator 1 is inserted. It is provided in the vicinity of the material lock 20 and roughly comprises a positioning pedestal indicated by reference numeral 30 for positioning the guide steel pipe 8 of the power shovel 1.

In FIG. 2, a child boom 4 is provided via a hydraulic cylinder 3 on a parent boom 2, which can be turned up and down, of a telescopic power shovel 1 so as to be able to go up and down.
A grandchild boom 5 is slidably provided on the child boom 4 and is slid by a telescopic mechanism 6. At the end of the grandchild boom 5, a clamshell 7 is provided. An ejector (not shown) for forcibly discharging the soil is provided inside the shell 7.

On the other hand, in the middle of the child boom 4, the flange 9
Is provided, and a seal steel pipe 10 is provided at the lower end. A pressure partition 11 is provided at the upper end of the child boom 4 in order to prevent air from leaking from a gap between the child boom 4 and the grandchild boom 5. The child boom 4 is provided with a vertical angle display indicator (not shown).

3 to 5, the main body 21 of the material lock 20 is formed as a cylindrical body. At the upper end thereof, upper and lower slide-type upper doors 22 and 23 are provided, and a sealing material 25 is provided at a peripheral portion of a tail steel pipe insertion hole 24 formed by the upper door 22 and the upper door 23. In addition, a lower door 26 (FIG. 1) that is opened downward is provided at a lower portion of the main body 21. Reference numeral 27 in the drawing denotes a work table.

Returning to FIG. 1, the operating device 31 of the positioning gantry 30 is fixed to the slab B. This operating device 3
A lower end of a vertical beam 32 is pivotally connected to 1, and a horizontal beam 33 that bends at a right angle is connected to the upper end of the vertical beam 32. And
At the end of the cross beam 33, a concave portion 34 that engages with the outer periphery of the guide steel pipe 8 and locks the flange 9 is fixed. The gantry 30 prevents the load due to the vibration of the power shovel 1 or the like from being transmitted to the material lock 20 and facilitates the positioning of the child boom 4.

Next, the manner of earth removal will be described with reference to FIGS. (1) Upper door opening process (FIG. 6). The upper door 22 and the upper door 23 of the material lock 20 are opened. (2) Clamshell insertion step (FIG. 6). By operating each of the booms 2 to 4, the clamshell 7 is inserted into the material lock 20. . (3) A gantry raising process (FIG. 6). The positioning gantry 30 is turned in the direction of the arrow and raised to the vertical position. (4) Positioning step (FIG. 7). Operate the parent boom 2 and the child boom 4, and
4, the outer periphery of the guide steel pipe 8 is deposited, and the flange 9 is locked and positioned. (5) Child boom vertical holding process (FIG. 7). According to the display of the vertical angle display indicator, the child boom 4 is held vertically. (6) Upper door closing step (FIG. 7). The upper door 22 and the upper door 23 of the material lock 20 are closed. (7) Pressurizing step (FIG. 8). The gap between the upper door 22 and the upper door 23 and the tail steel pipe 10 is sealed with the sealing material 12, and the inside of the material lock 20 is pressurized. (8) Excavated soil grasping process (Fig. 8). The lower door 26 of the material lock 20 is opened, the grandchild boom 5 is extended, and the excavated soil D previously collected immediately below the material lock 20 in the work room C is gripped by the clamshell 7. (9) Grandchild boom shortening step (FIG. 8). Until clamshell 7 fits inside material rock 20
Shrink grandchild boom 5. (10) Decompression step (FIG. 9). The lower door 26 is closed, and the inside of the material lock 20 is depressurized. (11) Seal loosening step (FIG. 9). Seal material 1 between upper door 22, upper door 23, and tail steel pipe 9
Loosen 2. (12) The gantry falling process (FIG. 9). The positioning base 30 is turned down in the direction of the arrow. (13) Child boom pull-out step (FIG. 10). The upper door 22 and the upper door 23 are opened, the parent boom 2 is operated, the child boom 4 is pulled out of the material lock 20, and the child boom 4 is discharged into a vessel (not shown) placed on the slab B.

[0016]

As described above, according to the present invention, the conventional pneumatic work can be eliminated, the excavated soil can be automatically and reliably discharged, and a discharge capacity two to three times that of the conventional one can be obtained. it can.

[Brief description of the drawings]

FIG. 1 is a side view showing an apparatus for implementing the present invention.

FIG. 2 is a side view showing the telescopic power shovel of FIG. 1;

FIG. 3 is a side view showing the material lock of FIG. 1;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a top view showing the operation of the upper door of FIG. 3;

FIG. 6 is a side view illustrating an upper door opening step, a clamshell insertion step, and a gantry raising step.

FIG. 7 is a side view illustrating a positioning step, a child boom vertical holding step, and an upper door opening step.

FIG. 8 is a side view illustrating a pressing step, an excavated soil grasping step, and a grandchild boom shrinking step.

FIG. 9 is a side view illustrating a pressure reducing step, a seal loosening step, and a gantry falling down step.

FIG. 10 is a side view illustrating a child boom pull-out step.

FIG. 11 is a perspective view illustrating an example of a conventional method.

FIG. 12 is a side sectional view illustrating another example of the conventional method.

[Explanation of symbols]

 A ... Caisson B ... Slab C ... Work room D ... Excavated soil 1 ... Telescopic excavator 2 ... Parent boom 3 ... Hydraulic cylinder 4 ... Child boom 5.・ ・ Sun boom 6 ・ ・ ・ Expansion mechanism 7 ・ ・ ・ Clam shell 8 ・ ・ ・ Guide steel pipe 9 ・ ・ ・ Flange 10 ・ ・ ・ Tail steel pipe 11 ・ ・ ・ Pressure bulkhead 12 ・ ・ ・ Seal material 20 ・ ・ ・ Material Lock 21 ・ ・ ・ Main body 22 ・ ・ ・ Top door 23 ・ ・ ・ Fixed door 24 ・ ・ ・ Tail steel pipe insertion hole 25 ・ ・ ・ Seal material 26 ・ ・ ・ Bottom door 27 ・ ・ ・ Work table 30 ・ ・ ・ Positioning Stand 31 ・ ・ ・ Operation device 32 ・ ・ ・ Vertical beam 33 ・ ・ ・ Transverse beam 34 ・ ・ ・ Concave surface

Claims (1)

(57) [Claims] An upper door opening step of opening an upper door of a material lock, a clamshell inserting step of inserting a clamshell of a telescopic power shovel into the material lock, and a gantry raising step of raising a positioning gantry;
A positioning step of aligning the guide steel pipe of the power shovel with the positioning base, a child boom vertical holding step of keeping the child boom vertical according to the display of the vertical angle display indicator, and an upper door closing step of closing the upper door of the material lock; A pressurizing step of sealing the gap between the upper door and the tail steel pipe to pressurize the inside of the material lock; opening the lower door of the material lock, extending the grandchild boom, and excavating the excavated soil collected immediately below the material lock in advance. Excavating soil grabbing step and a grandson boom shrinking step of shrinking the grandson boom until the clamshell fits in the material lock,
The decompression process of closing the lower door and depressurizing the inside of the material lock, the process of loosening the seal that shrinks the seal between the upper door and the tail steel pipe, the process of lowering the gantry to lower the positioning gantry, and opening the upper door to lower the child boom A pneumatic caisson method, comprising a step of pulling out a child boom to pull out the material lock and discharge the soil.