JPH09125404A - Excavating device for vertical shaft or foundation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To excavate the bottom ground of a working chamber including all corners by robots and increase the rigidity against the reactive force that an excavator suffers during excavation, in a small diameter pneumatic vertical shield or caisson. SOLUTION: A vertical shield 1 is installed at a position where a vertical shaft or a foundation for a structure is constructed and an excavator 12 is remotely controlled under a high pressure to excavate the ground G at the bottom of the working chamber and lower down the vertical shield 1. In this time, a ring-form beam 4 is formed between the working chamber 3 of the vertical shield 1 and an airtight chamber 5. A ring-form traveling rail 8 is fixed on the beam 4 to install a traveling body 9 receiving the reaction of the excavator so as to circularly run along the traveling rail 8. The excavator 12 is fixed to the traveling body 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic vertical shield or caisson construction method with a small diameter, in which the excavator is operated by remote control to excavate the ground at the bottom of the working room, sink it, and form a vertical shaft or structure. The present invention relates to an excavation device for constructing a foundation.

[0002]

2. Description of the Related Art A conventional technique for excavating the ground at the bottom of a vertical shield or caisson work chamber to sink the vertical shield or caisson to construct a shaft or a structural foundation is shown in FIGS. There is a technique shown in FIG.

In the technique shown in FIG. 7, a worker 60 excavates a natural ground G at the bottom of a working chamber 62 of a vertical shield or caisson 61, puts the excavated earth and sand into a sediment bucket 63, and lifts the equipment (see FIG. After the material is lifted to the ground by not shown) and the soil is discharged, the empty earth and sand bucket 63 is returned to the working chamber 62.

By repeating the above operations, the vertical shield or caisson 61 is submerged, segments are assembled above it, or cast-in-place concrete is poured to construct a vertical shaft or structure foundation.

In the technique shown in FIG. 8, the excavator 64 is carried into the working chamber 62 of the vertical shield or the caisson 61, and the excavator 64 is operated by the operator 65 to move the excavator 64.
The vertical shield or the ground G at the bottom of the working chamber 62 of the caisson 61 is excavated. Hereinafter, it is the same as the prior art shown in FIG.

In the technique shown in FIG. 9, the excavator 67 is suspended so that it can travel on the ceiling slab 66 of the work chamber 62 of the vertical shield or caisson 61, and another excavator 68 is carried into the work chamber 62. The excavators 67 and 68 are operated by remote control to excavate the ground shield G at the bottom of the work chamber 62 under high pressure of the vertical shield or the caisson 61. Less than,
This is similar to the prior art shown in FIG.

[0007]

However, in the case of manned construction shown in FIGS. 7 and 8, the safety and hygiene law restricts the working time under high pressure, and the work efficiency is very poor. There is a problem that hard work is inevitable.

In the unmanned construction of the conventional pneumatic vertical shield or caisson 61 shown in FIG. 9, the operating range of the excavators 67 and 68 is small in the case of a small diameter (planar area of 40 m ² or less, diameter of 7 m or less). However, there is a problem that it cannot be applied because of the small size.

The present invention has been made in view of the above circumstances, and an object of the present invention is, in a pneumatic vertical shield or caisson having a small diameter, to continuously cover the ground at the bottom of a work chamber by unmanned excavation. Another object of the present invention is to provide an excavating device for constructing a vertical shaft or a structure foundation, which can excavate efficiently and has high rigidity against the reaction force received by the excavator during excavation.

Another object of the present invention is to immediately respond to changes in the specifications of the shaft or structure foundation to be built, and disperse the reaction force acting on the excavator during excavation into a plurality of traveling body elements. An object of the present invention is to provide an excavating device for constructing a vertical shaft or a structure foundation that can be absorbed.

[0011]

In order to achieve the above-mentioned object, in the present invention, a vertical shield or caisson having at least a blade, a working chamber and an air chamber is installed from the lower part to the upper part, and under high pressure. And by operating the excavator by remote control, excavating the ground at the bottom of the working room, sinking the vertical shield or caisson, in the excavation device for building a shaft or structure foundation, the vertical shield or A ring-shaped beam is formed between the caisson's work room and the air chamber, and a traveling rail is fixed to this beam in a ring shape. It is installed and the excavator is attached to this traveling body.

Further, in order to achieve the above object, in the present invention, the traveling body is constituted by connecting a plurality of traveling body elements.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, an excavator is circulated together with a traveling body by a remote operation along a ring-shaped traveling rail fixed to a ring-shaped beam, and is moved to an arbitrary position.

At this arbitrary position, the revolving body, boom and jib of the excavator itself are also operated by remote control to freely move the excavation bucket, and the pneumatic vertical shield or the bottom of the caisson work chamber is operated. Excavate the mountain. The excavated sediment is put in a sediment bucket, lifted to the ground through a space that does not interfere with the excavator in the hole of the ring-shaped beam, discharged, and the empty sediment bucket is returned to the working chamber again.

During such excavation, the reaction force acting on the excavator is received and absorbed by the traveling body to which the excavator is attached.

After excavating the ground at the bottom of the work chamber, in the case of a vertical shield, a segment is assembled above the vertical shield, a reaction force is applied to the assembled segment to push the vertical shield, and the subsidence occurs. Let In the case of caisson, cast in-situ concrete is placed above the caisson and sinks due to the weight of the caisson and in-situ concrete.

The above operation is repeated to construct the desired shaft or structure foundation.

As described above, according to the present invention, since the excavator is operated by remote control, unmanned excavation in the working chamber can be performed in the pneumatic vertical shield or caisson, and the excavation can be performed efficiently. You can

Further, in the present invention, a ring-shaped beam is formed between the working chamber of the vertical shield or caisson and the air chamber, and the ring-shaped traveling rail is fixed to this beam, and the traveling body is installed on this traveling rail. However, since the excavator is attached to this traveling body and the excavator has a support structure that allows a small turn in the hole of the ring-shaped beam, in the small vertical vertical shield or caisson, the bottom of the working chamber Since the ground can be excavated without interruption and the traveling body receives and absorbs the reaction force that acts on the excavator during excavation, the excavator has a large rigidity against the reaction force during excavation. Trouble due to the reaction force of can be solved.

Further, according to the present invention, the traveling body which is the reaction force of the excavator is constructed by connecting a plurality of traveling body elements, and therefore, as the specifications of the shaft or the structure foundation to be constructed are changed, If the diameter of the Matic vertical shield or caisson has changed, it is sufficient to select the required number of traveling body elements according to the diameter and connect them, so the specifications of the shaft or structure foundation to be built have changed. In such a case, it is possible to immediately deal with it, and it is possible to disperse and absorb the reaction force acting on the excavator during excavation by dispersing it into a plurality of traveling body elements.

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

1 to 3 show a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is an enlarged vertical sectional view of a main part.

In the first embodiment shown in these drawings, the vertical shield 1, the pneumatic equipment, the excavator, and the earth and sand bucket 2 are provided.
2, a jack 24 for subsidence promotion, and a support slab 25,
Scaffold 27 and erector 29 for segment assembly
A guide / reaction force plate 30, a reaction force receiving girder 31, a shaft 34, an intermediate lock 36, a material lock 37, and the like are provided.

The vertical shield 1 has a blade opening 2, a working chamber 3, a ring-shaped beam 4, an air chamber 5 and a ring-shaped slab 6 from the lower part to the upper part, These are made of reinforced concrete or steel. Further, a steel outer shell body 7 is connected to the upper portion of the vertical shield 1 by anchor bolts.

The above-mentioned pneumatic equipment is equipped with a natural ground G at the bottom of the working chamber 3.
At the time of excavation, compressed air is supplied into the vertical shield 1 to form a predetermined high pressure state.

The excavator comprises a traveling rail 8, a traveling body 9, an excavator 12, and a control unit 21.

The traveling rail 8 is formed of I-shaped steel or H-shaped steel in a ring shape, and is fixed to the upper surface of the beam 4 of the vertical shield 1 concentrically with the beam 4.

In the first embodiment, the traveling body 9 is constructed by combining a plurality of traveling body elements 9a, 9b, 9c, ... In a ring shape and connecting them by fasteners such as bolts and nuts. Each traveling body element 9a, 9b, 9
c, ... Are formed in an inverted L-shaped cross section, and the excavator 12
The traveling body element 9a to which is attached has a web longer than the other traveling body elements 9b, 9c, .... A pair of wheels 10 is provided at the bottom of each traveling body element 9a, 9b, 9c, .... As can be seen from FIG. 3, the wheels 10 are attached so as to grip the traveling rail 8 from both sides thereof. As a result, the traveling body 9 can receive the reaction force received by the excavator 12 during excavation and can orbit the traveling rail 8. The traveling body element 9a to which the excavator 12 is to be mounted is provided with a bracket 11 for mounting the excavator on the surface of the beam 4 on the center side.

The excavator 12 includes a revolving structure 13, a boom 15, a boom operating jack 16, a jib 17, a jib operating jack 18, an excavation bucket 19, a bucket operating jack 20, and a control unit. 21 and 21. The revolving structure 13 is pivotally attached to a bracket 11 provided on the web of the traveling structure element 9a via a shaft 14.

The control unit 21 is mounted on the upper surface of the flange of the traveling element 9a. The control unit 21 is connected to a cockpit (not shown) installed on the ground with a signal cable, and the traveling body 9
The orbiting and the operation of each part of the excavator 12 are all performed by remote control.

The earth and sand bucket 22 is a wire rope 2
3 is linked to the lifting equipment (not shown) installed on the ground.

As can be seen from FIG. 1, a plurality of the subsidence jacks 24 are arranged at equal intervals in the circumferential direction, and are installed on the upper surface of the slab 6 above the air chamber 5. These sinking propulsion jacks 24 apply a reaction force to the guide / reaction force plate 30 via the segment 39 and the reaction force receiving girder 31 assembled above the vertical shield 1
It is designed to sink and propel

The support slab 25 is made of steel. The support slab 25 is installed on the slab 6 above the air chamber 5 and is fixed by anchor bolts 26.

The scaffold 27 for assembling the segment is
It is installed on the support slab 25.

The erector 29 is installed on an erector mount 28 which is erected above the scaffold 27.

The guide / reaction plate 30 is constructed of reinforced concrete or steel plate on the ground surface side.

The reaction force receiving girder 31 is formed in a ring shape, and an anchor bolt 32 is formed on the inner surface of the guide / reaction force plate 30.
It is fixed by.

The shaft 34 is built on the support slab 25, and an anchor lock 33 is provided on the lower portion of the shaft 34.

The intermediate lock 36 includes the shaft 34.
Is connected to the upper side of the shaft 34 and the intermediate lock 3
A lower hatch 35 is provided between the six.

The material lock 37 is connected to the upper portion of the intermediate lock 36, and an upper hatch 38 is provided on the upper portion of the material lock 37.

In the first embodiment, the construction is carried out as follows. (1) At the position where a vertical shaft or structure foundation should be built, the guide and reaction plate 3 that serves as a guide and reaction force for the vertical shield 1
Set 0. (2) The blade opening 2 of the vertical shield 1 is installed inside the guide / reaction plate 30. (3) After installing the blade 2, as the first lot, the peripheral wall of the working chamber 3 and the ring-shaped beam 4 are constructed of reinforced concrete, steel, or the like. (4) As the second lot, the peripheral wall of the air chamber 5 and the slab 6 are also constructed of reinforced concrete or steel. (5) After constructing the working chamber 3, the beam 4, the air chamber 5 and the slab 6 on the upper part of the blade 2 of the vertical shield 1, the supporting work in the working chamber 3 used for the construction of the first lot was dismantled. ， Removed
The traveling rail 8 which is a constituent member of the excavator, the traveling body elements 9a, 9b, 9c, ... Of the traveling body 9, the excavator 12 and the control unit 21 are carried in. Then, the ring-shaped traveling rail 8 is set on the upper surface of the beam 4 and fixed. Further, the traveling body elements 9a, 9b, 9c, ... Are assembled in a ring shape, and the assembled traveling body 9 is assembled to the traveling rail 8 via the wheels 10. Traveling element 9a,
Of the 9b, 9c, ..., to the bracket 11 provided on the traveling body element 9a to which the excavator 12 is to be attached,
The revolving unit 13 of the excavator 12 is attached via the shaft 14 to support the excavator 12 on the traveling unit 9. Further, a control unit 21 is mounted on the upper surface of the traveling body element 9a. (6) A support slab 25 made of steel is placed on the upper surface of the slab 6 in the upper part of the instep chamber 5 and fixed with anchor bolts 26. (7) Place the steel outer shell 7 on the upper surface of the slab 6,
This is also fixed with anchor bolts. In addition, a plurality of sinking propulsion jacks 24 are installed on the upper surface of the slab 6. (8) A scaffold 27 for segment assembly and an erector mount 28 are installed on the support slab 25, and the erector 29 is installed on the erector mount 28. Further, the anchor lock 33, the shaft 34, the lower hatch 35, the intermediate lock 36, and the material lock 37 are provided on the support slab 25.
And the upper hatch 38 is outfitted. (9) As off-site equipment, pneumatic equipment, segment crane equipment, power equipment, lifting equipment for earth and sand buckets, and cockpit for remote operation will be provided. (10) Excavation of the ground G at the bottom of the work chamber 3 of the vertical shield 1 and subsidence of the vertical shield 1 are performed under high pressure in principle except during the initial excavation. (11) The traveling body 9 and the excavator 12 are operated by remote control from the ground, and the excavator 12 excavates the natural ground G at the bottom of the working chamber 3 of the vertical shield 1. The traveling body 9 receives and absorbs the reaction force acting on the excavator 12 during the excavation. (12) The earth and sand excavated by the excavator 12 is put into the earth and sand bucket 22. When the earth and sand bucket 22 is filled with the excavated earth and sand, the earth and sand bucket 22 is hoisted through the wire rope 23 by the hoisting equipment installed outside the mine, and the earth and sand bucket 22 is operated by the work chamber 3, the air chamber 5, the anchor lock 33, and the shaft 34. After passing through the lower hatch 35 and the intermediate lock 36, they are once housed in the material lock 37. (13) After accommodating the earth and sand bucket 22 in the material lock 37, the lower hatch 35 is closed and the inside of the material lock 37 is decompressed. (14) After depressurizing the material lock 37 to atmospheric pressure,
The upper hatch 38 is opened, the sediment bucket 22 is lifted to the outside of the mine, and the sediment in the sediment bucket 22 is discharged. (15) After discharging the earth and sand in the earth and sand bucket 22, it is returned to the working chamber 3 again by the lifting equipment, and the anchor lock 33 is closed. (16) After excavating the ground G at the bottom of the work chamber 3 to a predetermined depth, the jack 24 for subsidence promotion is extended to
9. A reaction force is applied to the reaction force receiving girder 31 and the guide / reaction force plate 30 to sink the vertical shield 1. When the vertical shield 1 sinks, the sinking propulsion jack 24 balances the atmospheric pressure in the working chamber 3. (17) After the vertical shield 1 sinks, the segment pieces are suspended inside the premises by crane equipment outside the mine, and the erector 2
9 is gripped, the submergence-propulsion jack 24 at the position where the segment piece is to be assembled is contracted, and the segment piece is inserted into that position for assembly. (18) The key segment is assembled by inserting it from the axial direction. (19) After assembling the segment 39, the segment 3
In order to increase the adhesion between 9 and the ground around it, a backfill injection material is injected. A cement-based material is used as the backfill injection material. (20) These series of operations are repeated to build a vertical shaft or structure foundation with a predetermined depth.

According to the first embodiment described above, since the excavator 12 is operated by remote control, unmanned excavation of the ground G at the bottom of the working chamber 3 of the vertical shield 1 under high pressure. You can drill efficiently with.

Further, a ring-shaped beam 4 is formed between the working chamber 3 and the air chamber 5 of the vertical shield 1, and a ring-shaped traveling rail 8 is fixed to this beam 4 and the traveling body is mounted on this traveling rail 8. The traveling body element 9 in which the traveling body 9 is installed and constitutes the traveling body 9.
A pair of wheels 10 is provided at the bottom of a, 9b, 9c, ..., The traveling rail 8 is gripped from both sides by the wheels 10, and the excavator 12 is attached to the traveling body 9. Since 12 has a support structure that allows a small turning in the hole of the ring-shaped beam 4, even in the vertical shield 1 having a small diameter of 7 m or less, for example, the ground G at the bottom of the working chamber 3
Can be excavated without interruption, and the excavator 12
The reaction force acting on the traveling body 9 can be received by the traveling body 9, dispersed in the traveling body elements 9a, 9b, 9c, ... And absorbed.

Further, since the traveling body 9 is constructed by combining a plurality of traveling body elements 9a, 9b, 9c, ... And connecting them by fasteners such as bolts and nuts, the diameter of the vertical shield 1 is increased. Even if the number changes, it is possible to immediately deal with it by selecting and combining the required number of traveling element 9a, 9b, 9c, ....

Next, FIG. 4 is a plan view showing a second embodiment of the present invention, and FIG. 5 is an enlarged sectional view taken along line BB of FIG.

In the second embodiment shown in these figures, the first and second traveling rails 41, 42 are attached to the ring-shaped beam 4 formed between the working chamber 3 and the upper chamber 5 of the vertical shield 1. It is fixed. The first and second traveling rails 41 and 42 are both formed in a ring shape, the first traveling rail 41 is fixed to the upper surface of the beam 4, and the second traveling rail 42 is fixed to the inner peripheral surface of the beam 4. There is.

On the other hand, the running body 43 is composed of a single body having an inverted L-shaped cross section. Beam 4 in the web of this traveling body 43
On the surface of the center of the
4 are provided. Further, a pair of first wheels 45 is provided on the bottom of the flange of the traveling body 43. Further, a pair of second wheels 46 is provided on the surface of the traveling body 43 on the opposite side of the web on which the brackets 44 are provided. The first wheels 45 are assembled so as to grip the first traveling rail 41 from both sides thereof. The second wheels 46 are assembled so as to grip the second traveling rail 42 from both sides thereof. as a result,
The traveling body 43 is a set of the first traveling rail 41 and the first wheel 45,
And the second traveling rail 42 and the set of the second wheels 46 are supported at two places, and the first and second traveling rails 41, 4
It is mounted so that it can go round along 2.

Bracket 4 provided on the running body 43
The revolving structure 13 of the excavator 12 is attached to the shaft 4 via a shaft 14. The control unit 21 is mounted on the upper surface of the flange of the traveling body 43.

In the second embodiment, the excavator 12 is carried by the traveling body 43 formed of a single body, and the traveling body 43 is
And the excavator 12 together the first and second traveling rails 41, 4
Move along 2. Further, the reaction force acting on the excavator 12 during excavation is directly received by the traveling body 43.

The other structure and operation of the second embodiment are the same as those of the first embodiment.

Next, FIG. 6 is a vertical sectional view showing a third embodiment of the present invention.

In the third embodiment shown in FIG. 6, the caisson 48, the pneumatic equipment, the excavation equipment, and the earth and sand bucket 22.
A support slab 54, an inner scaffold 56, an outer scaffold 57,
A shaft 34, an intermediate lock 36, a material lock 37, etc. are provided.

The caisson 48 has a blade 49, a working chamber 50, and a ring-shaped beam 51 from the bottom to the top.
, An instep chamber 52, and a ring-shaped slab 53. The blade 49 is made of reinforced concrete or steel. The peripheral wall of the working chamber 50, the ring-shaped beam 51, the peripheral wall of the air chamber 52, and the ring-shaped slab 53 are made of reinforced concrete.

The pressure equipment is the same as in the first embodiment.
At the time of excavating the natural ground G at the bottom of the working chamber 50, compressed air is supplied into the caisson 48 to form a predetermined high pressure state.

The excavator is also the same as in the first embodiment.
The traveling rail 8, the traveling body 9, the excavator 12, and the control unit 21 are provided, and the traveling rail 8 is arranged on the upper surface of the ring-shaped beam 51 concentrically with the beam 51 and fixed. There is. The other members are designated by the same reference numerals as those of the excavator of the first embodiment and will not be described further.

Like the first embodiment, the earth and sand bucket 22 is also linked to a lifting equipment (not shown) installed on the ground via the wire rope 23.

The support slab 54 is made of steel. The support slab 54 is installed on the upper surface of the slab 53 above the air chamber 52 and is fixed by anchor bolts 55.

The inner scaffold 56 is constructed on the premises every time the cast-in-place concrete 58 is cast at an appropriate height, and is used to assemble a formwork and a reinforcing bar for casting the next cast-in-place concrete.

The outer scaffold 57 is constructed on the ground as necessary as the cast-in-place concrete 58 is placed,
It is ready for the next pouring of concrete.

The anchor lock 33, shaft 34, lower hatch 35, intermediate lock 36, material lock 37.
The upper hatch 38 and the upper hatch 38 are also successively provided above the support slab 54, as in the first embodiment.

By the way, at the time of constructing the shaft or structure foundation according to the third embodiment, it is not necessary to construct the guide / reaction plate as in the first embodiment, but at the position where the shaft or structure foundation should be constructed. Install caisson 48.

Next, the traveling body 9 and the excavator 12 of the excavator are operated by remote control, and the working room 5 of the caisson 48 is operated.
Excavate the ground G at the bottom of 0. After putting the excavated earth and sand into the earth and sand bucket 22, and when the earth and sand bucket 22 is filled with earth and sand, after being lifted to the outside of the mine by the lifting equipment and discharged,
The empty earth and sand bucket 22 is returned to the working chamber 50.

Ground G at the bottom of the working chamber 50 of the caisson 48
After excavating the caisson 48, the caisson 48 is first sunk by its own weight.

In this way, after the caisson 48 is submerged to a predetermined depth, one lot of cast concrete 58 is cast on the upper part of the caisson 48.

After the cast-in-place concrete 58 is placed on the upper part of the caisson 48, the ground G at the bottom of the working chamber 50 of the caisson 48 is excavated, and at the same time, the weight of the caisson 48 and the cast-in-place concrete 58 placed therein is reduced. Use it to sink.

When scaffolding is required due to excavation of natural ground G at the bottom of the working chamber 50, pouring of cast-in-place concrete 58, and subsidence of caisson 48, inner scaffold 56 and outer scaffold 57 are constructed. , I will add the required height again.

The above work is repeated to construct a vertical shaft or structure foundation having a predetermined depth.

Therefore, the third embodiment is different from the first embodiment in that the segment 39 is assembled on the upper portion of the vertical shield 1,
Instead of the construction in which the submergence jack 24 takes the reaction force to the segment 39, the reaction force receiving girder 31 and the guide / reaction force plate 30, the concrete is placed on the upper part of the caisson 48 in accordance with a predetermined lot division. The construction is the same as that of the first embodiment except that the construction is adopted in which the caisson 48 and the cast-in-place concrete 58 are submerged and settled.

Further, in the third embodiment, in addition to the weight of the caisson 48 and the cast-in-place concrete 58, load water may also be used together.

Further, also in the third embodiment, the excavator 12 may be attached to the single traveling body 43 as shown in the second embodiment.

[0071]

As described above, according to the first aspect of the present invention,
In the invention described, since the excavator is controlled by remote control, unmanned excavation in the working room is possible with the pneumatic vertical shield or caisson, and the worker is freed from the troublesome work under high pressure. There is also an effect that can be done, there is also an effect that can be excavated efficiently. Further, in the present invention, a ring-shaped beam is formed between the work chamber of the vertical shield or caisson and the air chamber, and the ring-shaped traveling rail is fixed to this beam, and the traveling body is installed on this traveling rail. Since the excavator is attached to the traveling body and the excavator has a support structure that makes a small turn in the hole of the ring-shaped beam, in a small diameter vertical vertical shield or caisson,
Rigidity of the excavator against reaction force at the time of excavation because the traveling body receives and absorbs the reaction force acting on the excavator at the time of excavation Therefore, there is also an effect that troubles due to reaction force during excavation can be eliminated.

Further, in the invention according to claim 2 of the present invention, since the traveling body which is the reaction force receiving of the excavator is constituted by connecting a plurality of traveling body elements, the shaft or structure foundation to be constructed. If the diameter of the pneumatic vertical shield or caisson changes with the specifications of, the required number of traveling body elements should be selected according to the diameter, and it is sufficient to connect them. Even if the specifications of the structure foundation are changed, there is an effect that it can immediately respond, and there is also an effect that the reaction force acting on the excavator can be dispersed and absorbed by the plurality of traveling body elements.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged vertical sectional view of a main part of the first embodiment.

FIG. 4 is a plan view showing a second embodiment of the present invention.

5 is an enlarged sectional view taken along line BB of FIG.

FIG. 6 is a longitudinal sectional view showing a third embodiment of the present invention.

FIG. 7 is an explanatory view showing a conventional art manual digging work in a pneumatic vertical shield or caisson.

FIG. 8 is an explanatory view showing manned machine excavation which is a conventional technique in a pneumatic vertical shield or caisson.

FIG. 9 is an explanatory view showing unmanned mechanical excavation which is a conventional technique in a pneumatic vertical shield or caisson.

[Explanation of symbols]

 1 Vertical Shield 2 Vertical Shield Blade 3 Vertical Shield Working Room 4 Vertical Shield Ring Beam 5 Vertical Shield Air Armor G Ground 8 Running Rail 9 Traveling Body 9a, 9b, 9c, ... Traveling body element 10 Wheels of traveling body 11 Bracket for mounting excavator 12 Excavator 21 Control unit for traveling body and excavator 22 Sediment bucket 24 Jack of vertical shield sinking promotion 29 Electa for segment 30 Vertical shield Guide / reaction force plate 31 Reaction force receiving girder 39 Segment 41 First traveling rail 42 Second traveling rail 43 Traveling body 44 Bracket for mounting excavator 45 First wheel of traveling body 46 Second wheel of traveling body 48 Caisson 49 Caisson Blade edge 50 Caisson working room 51 Caisson ring beam 52 Air chamber 58 Striking concrete G

Claims (2)

[Claims] 1. A vertical shield or caisson having at least a blade, a working chamber and an air chamber is installed from the bottom to the top, and the excavator is operated under high pressure and by remote control, and the bottom of the working chamber is installed. In the excavation device for excavating the natural ground, submerging the vertical shield or caisson, and constructing a vertical shaft or structure foundation, a ring-shaped beam is provided between the working chamber and the air chamber of the vertical shield or caisson. A traveling rail is fixed to the beam in a ring shape, a traveling body that is an excavator reaction force receiver is installed so that the traveling rail can orbit along the traveling rail, and the excavator is attached to the traveling body. An excavation device for building a vertical shaft or a structural foundation. 2. The excavating device for constructing a vertical shaft or a structure foundation according to claim 1, wherein the traveling body is configured by connecting a plurality of traveling body elements.