JPH08218767A - Construction method for horizontal slab-shaped structure in ground - Google Patents

Abstract

PURPOSE: To construct accurately and efficiently a horizontal slab-shaped structure with high rigidity in a banking structure by means of a horizontal slab- shaped shield machine. CONSTITUTION: Side working spaces are ensured in sides of a place on which a horizontal slab-shaped structure is constructed, a shield installation space is constructed in the ground, divided parts of a shield machine 18 are brought in the side working spaces, they are built up and are pulled in the shield installation space, and the horizontal slab-shaped shield machine 18 is constituted. A horizontal tunnel is excavated by the shield machine 18, it is driven, divided parts of materials forming the horizontal slab-shaped structure are brought in the side working spaces and are built up to insert it in a backward space of the shield machine 18. By the constitution, a plurality of materials are arranged, and they are connected to each otherto construct the horizontal slab- shaped structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a horizontal plate-shaped structure in the ground, and more specifically, a horizontal plate-shaped structure is provided in a filling structure by using a horizontal plate-shaped shield machine. The present invention relates to a building method for accurately and efficiently building.

[0002]

2. Description of the Related Art Conventionally, in order to build a horizontal plate-like structure in a fill structure, a propulsion unit 100 is installed on a propulsion base 101 as shown in FIGS. Excavating the inside of the propulsion pipe 102, pushing the propulsion pipe 102 against the propulsion pedestal 101 as a reaction force, and by repeating this work, the propulsion pipes 102a, 102b, 102c, ... .

[0003]

However, in the above-mentioned prior art, since the excavation is performed only at the tip of the propulsion pipe 102, the excavation speed is slow, and since the propulsion pipes 102 are installed one by one, the propulsion pipes are tightly connected to each other. It is difficult to obtain a structure with low rigidity and high rigidity. For example, when constructing a beam made of concrete other than steel pipe, it is necessary to replace it with a concrete beam after propelling the steel pipe. There are problems that the ground surface is raised and that a large work site is required on the side of the place where the horizontal plate-shaped structure is built.

The present invention has been made in view of the above circumstances, and its object is to construct a horizontal plate-like structure at a filling structure, on the upper surface of which a road, a railroad, or the like has already been formed. Even if it is laid, it can be constructed while avoiding the problems that the ground surface rises or collapses, and it is possible to efficiently construct a horizontal plate structure that is accurate and has high rigidity, and the work site is small. An object of the present invention is to provide a method for constructing a horizontal plate-shaped structure in the ground.

Another object of the present invention is to provide a method for constructing a horizontal plate-like structure in the ground, which can more reliably carry out earth retaining and can be safely constructed.

[0006]

In order to achieve the above-mentioned object, the present invention divides a shield machine 18 for excavating a horizontal shaft for constructing a horizontal plate-shaped structure into a plurality of parts in the width direction and assembles them. A side working space 6 which can be assembled by bringing the divided part of the shield machine 18 into the assembly type is secured at a place where a horizontal plate-shaped structure is constructed, and from this side working space 6, a predetermined position of the place is established. At the depth position, the shield installation space 11 is built, the divided part of the shield machine 18 is brought into the side working space 6, the shield installation space 11 is inserted, and the next part of the shield machine 18 is brought in. This shield machine main body 1 is connected to the portion inserted in the shield installation space 11 and this operation is repeated to assemble a shield machine main body 19 continuous in the width direction of the place.
The earth retaining plate 30 having a protruding shape is attached to both sides in the width direction of 9, and the excavator driving device 26 is attached to at least one side portion to form a horizontal plate-shaped shield machine 18.
The shield machine 18 excavates the ground horizontally, excavates the excavated earth and sand to the side and excavates the side shaft, and in the side working space 6, a horizontal plate shape divided into a plurality of parts. A portion in which the portion of the girder material for constructing a structure is brought in, the portion of the girder material is inserted into the space formed behind the shield machine 18, and the portion of the girder material brought in next is inserted into the space. , And this work was repeated to combine them into one girder material, and the girder materials were arranged in the horizontal direction along with the excavation of the shield machine 18, and the girder materials were connected to construct the horizontal plate-shaped structure 48. It is a thing.

In order to achieve the above-mentioned object, the present invention uses the steel sheet piles 4 and 4 as the earth retaining means by placing steel sheet piles 4 and 4 at a predetermined interval in the width direction of a place where a horizontal plate-like structure is built. The earth retaining plates 30, 30 of the shield machine 18 are replaced by the steel sheet piles 4,
4 is attached to the side of the shield machine main body 19 close to the outside of the shield machine 18, the steel sheet piles 4, 4 are cut at the lower part of the shield machine 18 when the shield machine 18 is digging, and the height of the shield machine 18 is advanced when the shield machine 18 is moving forward. Only the steel sheet piles 4, 4 are pulled up, and after passing through the shield machine 18, earth retaining material is used to hold down the ground.

[0008]

If necessary, earth retaining works such as steel sheet piles are placed on both sides in the width direction of the place where the horizontal plate-like structure is to be built, and in the present invention, both sides in the width direction of the shield machine main body 19,
Since the earth retaining plate 30 having a shape protruding vertically and forwardly of the shield machine main body 19 is attached, it is possible to receive earth pressure and water pressure when the shield machine 18 is excavating a side shaft, and prevent collapse of the face. A horizontal plate-shaped shield machine 18 is used to horizontally excavate a position at a predetermined depth of the place, and after excavating a horizontal shaft, a girder material such as a PC girder is inserted and connected to a space formed behind the horizontal shaft, Since the horizontal plate-shaped structure 48 is constructed, the case where the horizontal plate-shaped structure is constructed is the embankment structure and the road or the railroad is already laid on the upper surface thereof. However, the horizontal plate-shaped structure 4 while avoiding the problem that the ground surface rises or sinks
8 can be built.

Further, in the present invention, the shield machine 18 for excavating the side shaft is divided into a plurality of parts in the width direction and assembled into a divided / assembled type, which is secured in a place where a horizontal plate-like structure is built. The divided part of the shield machine 18 is brought into the side working space 6, and the part is inserted from the side working space 6 into the shield installation space 11 built at a predetermined depth position of the place, The part brought into the side working space 6 and the part inserted in the shield installation space 11 are connected to each other to be assembled, and the girder material for constructing the horizontal plate-like structure is also formed into a plurality of parts. And the divided part of the girder material is brought into the side working space 6 and inserted into the space formed behind the shield machine 18, and then the brought-in part and the shield machine 18
Since the portion inserted in the rear of the is connected to one girder material, the work site on the side of the place where the horizontal plate-shaped structure is built can be reduced.

Further, in the present invention, a horizontal plate-shaped shield machine 1
Since the horizontal shaft 8 is excavated horizontally to excavate the horizontal shaft and the horizontal plate-shaped structure 48 is constructed along the horizontal shaft, the horizontal plate-shaped structure 48 can be accurately constructed.

Further, in the present invention, after excavating the shaft, the divided parts of the girder material are brought into the space formed behind the shield machine 18 from the side working space 6 and assembled into one girder material. At the same time, the girders are arranged in the horizontal direction as the shield machine 18 is dug, and the girders are connected to construct the horizontal plate-shaped structure 48. , And the girders arranged in the horizontal direction can be firmly connected to each other, so that the horizontal plate-shaped structure 48 having high rigidity can be built.

In addition, according to the present invention, as described above, the work site on the side of the place where the horizontal plate-shaped structure is constructed can be small, and the horizontal plate-shaped shield machine 18 is used to dig into the ground. , You can increase the speed of digging,
Since the excavated earth and sand are discharged to the side of the shield machine 18, the earth removal does not interfere, and after excavating the side shaft, the girder material can be brought in immediately behind the shield machine 18 and assembled. Together, the horizontal plate-shaped structure 48 can be efficiently constructed.

Further, as the earth retaining plates, steel sheet piles 4 and 4 are driven at predetermined intervals in a width direction of a place where a horizontal plate-like structure is built, and the earth retaining plates 30 of the shield machine 18 are attached.
30 is attached to the side of the shield machine main body 19 so as to be close to the outside of the steel sheet piles 4 and 4, and the steel sheet piles 4 and 4 are cut at the bottom of the shield machine 18 when the shield machine 18 is being advanced, and the shield machine 18 is moved forward. At times, the steel sheet piles 4, 4 are pulled up by the height of the shield machine 18, and after passing through the shield machine 18, the earth retaining material is used to hold down the ground.
The earth retaining at the time of excavation by 8 can be performed more reliably and can be constructed safely.

[0014]

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

FIG. 1 is a vertical sectional front view of a place where a horizontal plate-shaped structure is built.

The place shown in FIG. 1 is constructed by embankment 1. The railway 2 is already laid on the upper surface of the embankment 1, but it may be a road. In this embodiment, a horizontal plate-shaped structure is to be built at a predetermined depth of the embankment 1. In addition, 3 in the figure indicates a site boundary.

FIG. 2 is a vertical sectional front view showing a state in which a side working space is built in the width direction of the embankment.

As shown in FIG. 2, steel sheet piles 4 and 4 are driven by a conventional method at predetermined intervals in the width direction of the embankment 1, and the steel sheet piles 4 and 4 are fastened with tie rods 5, Build earth retaining. Next, both sides of the embankment 1 in the width direction are excavated to secure the side working space 6. Next, using the side working space 6, the structure foundation pile 7 is constructed by a conventional construction method such as a reverse construction method or an all casing construction method.
In the figure, 8 indicates a train.

FIG. 3 is a vertical sectional front view showing a state where the shield installation space is built, and FIG. 4 is a plan view of FIG.

As shown in FIGS. 3 and 4, track girder support piles 9 and 9 are placed outside the earth retaining plates 4 and 4 to temporarily receive the railway 2 and construct a construction girder 10. To do. Next, the earth which is the embankment 1 is excavated from the upper surface of the embankment 1 at a predetermined depth from the one side working space 6 toward the other side working space 6 and penetrates in the width direction of the embankment 1. Build a shield installation space 11.

FIG. 5 is a vertical sectional front view showing the process of suspending the shield machine part, retracting it into the shield installation space, and assembling process. FIG. 6 is a plan view of FIG.

As shown in FIGS. 5 and 6, a joint pillar 7'is added to the upper portion of the structure foundation pile 7 and a pier pile 12 is placed in one of the side working spaces 6.
Then, in one side working space 6, a lining 14 is temporarily installed between the rails 13a and 13b laid on the track girder support pile 9 and the joint pillar 7 ', and the joint pillar 7'and the pier pile 12 are provided. A lining 14 is temporarily installed between the laid rails 13c and 13d, and a guide rail 15 is laid on the upper part of the row of the joint columns 7 '. In the other side working space 6, a lining 14 is temporarily installed between the rails 13e and 13f laid on the joint column 7'and the track girder support pile 9, and the guide rail 15 is provided above the row of the joint columns 7 '. To lay.

Next, a traction device 16 for retracting the shield machine 18 into the shield installation space 11 is installed in the other side working space 6.

FIG. 7 is a plan view showing an example of the shield machine, FIG. 8 is a sectional view taken along line AA of FIG. 7, and FIG. 9 is a sectional view taken along line BB of FIG.

The shield machine 18 of the embodiment shown in FIGS. 7 to 9 is provided with a flat box-shaped shield machine body 19. A partition wall 20 and excavation tools 21a and 21b are attached to the front portion of the shield machine body 19. In addition, on both sides of the shield machine main body 19 in the front,
Excavator drive devices 26, 26 are provided. further,
The earth retaining plates 30, 30 are attached from the front end portion to the rear end portion of the shield machine main body 19. Furthermore,
A plurality of propulsion jacks 31 are provided on the front half side inside the shield machine main body 19, a girder material insertion portion 32 such as a PC girder is formed on the rear half side, and a tail seal 33 is formed on the rear end portion. Is attached.

The partition wall 20 is indicated by an arrow x in FIG. 7 and FIG.
It is formed in a concave arc toward the excavation direction of the shield machine 18 and is fixed to the front end portion of the shield machine body 19.

The excavation tools 21a and 21b are the shaft 2
2a, 22b and screws 23a, 23b. The shafts 22a and 22b are rotatably supported by bearings 24, and the excavator driving device 26,
It is connected to 26. The screws 23a, 23b
A large number of bits 25 are provided on the outer periphery of.

The excavator driving device 26 is attached to both sides of the shield machine body 19 in the width direction. Each excavator driving device 26 has a casing 27 fixed to a side portion of the shield machine main body 19 with the earth retaining plate 30 interposed therebetween, and motors 28a and 28b installed inside the casing 27. The motors 28a, 28b are provided with excavator tools 21a, 2
1b shafts 22a and 22b are drivingly connected.
Then, the excavator driving devices 26, 26 attached to both sides of the shield machine body 19 are driven synchronously, and the excavators 21a, 21b are synchronously rotated in the directions indicated by arrows a, b in FIG. It can be done.

Casing 2 of each of the excavator driving devices 26
A soil discharge port 29 is formed at 7, and the excavated earth and sand is discharged to the side work space 6 through the soil discharge port 29.

The earth retaining plate 30 is a shield machine main body 19
Of the shield machine main body 19 and is attached to both sides of the shield machine main body 19 in the width direction. The two earth retaining plates 30, 30 are arranged so as to be close to the outer side of the earth retaining by the steel sheet piles 4, 4 which have been previously cast on the embankment 1.

A plurality of the above-mentioned propulsion jacks 31 are provided in the upper and lower portions inside the shield machine main body 19, for example, two at a time, and the girder member 4 inserted closest to the propulsion jack 4 is provided.
The reaction force of 1 is applied to propel the entire shield machine 18.

The girder material insertion portion 32 is the shield machine main body 1
It is formed so that a girder member 41 such as a PC girder can be inserted from the side in the width direction in the latter half portion of 9.

The tail seal 33 is provided at the rear end portion of the shield machine main body 19 and prevents the back-filling injection material or the like from entering the shield machine main body 19.

The shield machine main body 19, members attached to the shield machine main body, and the excavation tools 21a, 21b are divided into a plurality of portions 34a, 34b, 34c, ... In the width direction. Then, the divided parts of the shield machine main body 19 and the members attached thereto are connected and assembled by the connecting metal fittings 35 on site, and the divided parts of the excavators 21a and 21b are cupped on site. The ring 36 is connected. The excavator driving device 26 and the earth retaining plate 30 are also assembled on the side of the shield machine body 19 on site.

Going back, as shown in FIGS. 5 and 6, the divided portion 34a of the shield machine 18 is hung by a crane, brought into one side working space 6, and placed on the guide rail 15. It is connected to the wire rope 17, pulled by the pulling device 16, and inserted into the shield installation space 11. Then, the next divided part 3 of the shield machine 18
4b is brought in in the same manner as the portion 34a, and is connected to the portion 34a inserted into the shield installation space 11 in the one side working space 6. The parts 34a and 34b are connected by the coupling 36 between the excavators 21a and 21b; 21a and 21b, and the connection fitting 35 between the shield machine main body 19 and members attached thereto. After connecting the portions 34a and 34b, the traction device 1 is again provided.
It is pulled in by 6 and inserted into the shield installation space 11.

By repeating the above operation, the shield machine main body 19 which is continuous in the width direction is assembled. Next, the earth retaining plate 30 and the excavator driving device 2 are provided on both sides of the shield machine body 19.
6 is attached to form a horizontal plate-shaped shield machine 18.

In the assembled state as described above, the shield machine 18 is placed on the guide rails 15 laid in the side working spaces 6 on both sides. Further, in this state, the earth retaining plates 30 attached to both sides of the shield machine body 19 are close to the outer side of the earth retaining member made of the steel sheet pile 4 and work together as an earth retaining member.

FIG. 10 is a side view showing a state in which various devices for excavating the embankment and assembling the girder material are provided, and FIG.
FIG. 11 is a plan view of FIG. 10.

As shown in FIGS. 10 and 11,
A belt conveyor 37 and a dump truck 38 are arranged in the side working spaces 6 on both sides. Further, a backfill injection device 44 and a lubricant injection device 45 are installed in one side work space 6, and a pulling device 39 for a girder material is installed in the other side work space 6.
Is installed. The towing device 39 is installed so as to be movable along the guide rail 15.

Then, a portion 41a of the girder material 41 such as a PC girder is brought into one of the side working spaces 6, and this portion 41a
Is pulled into the girder material insertion portion 32 behind the shield machine 18 by the pulling device 39 via the wire rope 40 and inserted. Similar to the portion 41a, the next portion 41b is brought into the one side working space 6 and is connected to the portion 41a inserted in the girder material insertion portion 32 via a connecting metal fitting (not shown), and the wire is again connected. It is retracted by the rope 40 and the traction device 39.

The above-described operation is repeated to collect one girder material 41, and the girder material 41 is arranged behind the shield machine 18.

Next, the shield installation space 11 is backfilled with earth and sand, and the work girder 10 and the track girder support pile 9 are removed.

FIG. 12 is a side view showing a process of horizontally excavating a predetermined depth position of the embankment, assembling the girder material 41 behind the shield machine, and constructing a horizontal plate-like structure, and FIG.
It is a figure which shows only the half part of the top view of FIG.

As can be seen from FIGS. 12 and 13, when the shield machine 18 is excavating in the embankment, the steel sheet pile 4 is cut at the lower portion of the shield machine 18, and the cut steel sheet pile 4 is cut by the shield machine 18. Only pull it up and cut the part above the ground.

Then, the excavation tool 21a of the shield machine 18,
21b excavates a predetermined depth position of the embankment 1, and excavates the earth and sand from the earth discharge port 29 formed in the casing 27 of the excavator driving device 26 of the shield machine 18 to the side working spaces 6 on both sides. To do. Obstacles in the soil such as gravel and concrete debris are screw 2 of excavator 21a, 21b.
3a, 23b soil removal action, and screws 23a, 2
3b is swung back and forth or left and right in the excavation direction x to be taken into the screws 23a and 23b and discharged. The earth and sand discharged from the earth discharge port 29 are loaded on the dump truck 38 by the belt conveyor 37 and discharged outside the site.

Here, the shield machine 18 is provided with earth retaining plates 30 having a shape projecting vertically and forwardly of the shield machine body 19 on both sides of the shield machine body 19 in the width direction. Since the plates 30 and 30 are close to the outside of the steel sheet piles 4 and 4 that have been previously placed as earth retaining members, the two cooperate to receive earth pressure and water pressure,
Prevent the face from collapsing.

After excavating the embankment 1 which is the ground of a predetermined area, a plurality of propulsion jacks 31 installed in the shield machine 18 are set using the girder material 41 preassembled behind the shield machine 18 as a reaction force. The shield machine 18 is extended all at once, and the entire shield machine 18 is propelled in the direction of arrow x to excavate the horizontal shaft horizontally. Then, the propulsion jack 31 is reduced. At this time, the backfill material is supplied from the backfill injection device 44, and the gap between the girder material 41 and the horizontal shaft is filled and sealed.

As the shield machine 18 is propelled as described above, the shield machine 1 is placed outside the cut steel sheet piles 4 and 4.
After the soil retaining plates 30 and 30 of 8 pass, the cut steel sheet piles 4 and 4 are pushed in and the sandbag 46 is piled up, so that the sandbag 46 and the sandbag 46 are integrated to hold down the ground.

FIG. 14 is a side view showing the process of inserting and assembling the next girder material into the space formed behind the shield machine after propelling the shield machine, and FIG. 15 shows only a half of the plan view of FIG. FIG.

As shown in FIGS. 14 and 15,
After propelling the shield machine 18, the portion 42a of the girder material 42 is brought into the one side working space 6 by the crane 47, and the girder material insertion portion 32 formed in the rear part of the shield machine body 19 is carried out.
Then, the wire rope 40 and the pulling device 39 are pulled in and inserted. Then, the next portion 42b is brought into the side working space 6 in the same manner as the portion 42a, and the next portion 42b is inserted into the portion 42a inserted into the girder material insertion portion 32.
Are connected by connecting metal fittings, and are drawn in again by the wire rope 40 and the pulling device 39, and the parts 42a, 42
b, ... Are gathered in one girder material 42.

The above work is repeated to arrange the girder material 43 next to the girder material 42, arrange an appropriate number of girder materials 42, 43, ... And connect the adjacent girder materials to each other. The structure 48 is built.

FIG. 16 is a vertical sectional front view showing a horizontal plate-like structure built in the embankment structure and an underground structure built in association therewith.

As described above, the horizontal plate-shaped shield machine 18
To excavate horizontally in the embankment structure, excavate a side shaft,
The horizontal plate-shaped structure 48 built by pulling the girders 41, 42, 43, ... Into the side shaft and connecting them to each other is installed on the guide rails 15, 15 and the structure foundation piles 7, 7 used at the time of building. By integrating the row of the joint columns 7'and 7'that have been added together as the receiving beam 49, it is possible to safely support traffic on the ground. Along with this, it is possible to use the space under the girder 50 for other traffic or to build an underground structure 51.

As can be seen from the above description, according to this embodiment, earth retaining works by steel sheet piles 4 and 4 are placed on both sides in the width direction of a place where a horizontal plate-like structure is to be built, and a shield machine is used. The shield machine body 1 is provided on both sides of the body 19 in the width direction.
Earth retaining plates 30 and 3 having a shape projecting vertically and forwardly of 9
0 is attached, and at the start of the shield machine 18, the lower parts of the steel sheet piles 4, 4 are cut at the lower part of the shield machine 18, lifted by the height of the shield machine 18, and after passing through the shield machine 18, the cut steel sheet pile 4 , 4 and earth retaining material for earth retaining, and the earth retaining plates 30, 30 on the outside of the steel sheet piles 4, 4.
Are attached to both sides of the shield machine main body 19 so as to be close to each other, it is possible to reliably receive earth pressure and water pressure when the shield machine 18 is excavating the side shaft, and reliably prevent the face from collapsing. A sandbag, an L-shaped precast member, or the like is used as the soil retaining material, which is integrated with the girder material for soil retaining.

Further, in this embodiment, the horizontal plate-shaped shield machine 18 horizontally excavates a position of a predetermined depth of a place where the horizontal plate-shaped structure is to be built, and after the horizontal shaft is excavated, it is formed behind it. Girder materials 41, 42, 43, such as PC girders, in the created space
The horizontal plate-like structure 48 is constructed by inserting and connecting the ..., Further, the shield machine 18 is placed on the pre-laid guide rails 15 and 15, and is horizontally along the guide rails 15 and 15. Since it is propelled in the direction, even if the place where the horizontal plate-shaped structure is to be built is the embankment structure and the railway 2 or road has already been laid on it, The ground surface is raised,
Horizontal plate-like structure 48 while avoiding problems such as collapse
Can be built.

Further, in this embodiment, the shield machine main body 19 of the shield machine 18, members attached thereto, and the excavator 2
1a, 21b and a plurality of portions 34a, 34b, 34c,
It is divided into ... and assembled on site, and the earth excavator plate 30 is sandwiched between the excavator tool driving devices 26 to be mounted on both sides of the shield machine body 19 on site, and further, the girder material is used. , 41, 42, 43, ... are each divided into a plurality of parts, which are connected to the side working space 6 and inserted into the girder material insertion part 32 at the rear part of the shield machine body 19, so that the horizontal plate-like structure is provided. The side working space 6 at the place where the object is to be built can be made small, and the construction can be easily performed accordingly.

Further, in this embodiment, the horizontal plate-shaped shield machine 18 is horizontally propelled along the guide rails 15, 15 laid in the side working spaces 6, 6 on both sides to excavate the side shaft, Since the horizontal plate-shaped structure 48 is constructed along this side pit, the horizontal plate-shaped structure 48 can be constructed extremely accurately.

Further, in this embodiment, after excavating the shaft, the divided parts of the girders 41, 42, 43, ... Are brought into the space formed behind the shield machine 18 from the side working space 6, respectively. Assembling, one girder material 41, 4 respectively
, 43, ... Also, as the shield machine 18 is dug, the girders 41, 42, 43, ... Are arranged in the horizontal direction and connected to construct a horizontal plate-like structure 48. Therefore, the parts constituting one girder material and the girder materials 41, 42, 4 arranged in the horizontal direction are arranged.
.. can be firmly connected to each other, so that the horizontal plate-shaped structure 48 having high rigidity can be built.

Moreover, in this embodiment, the work site on the side of the place where the horizontal plate-like structure is built, that is, the side work space 6
Is small, and since the horizontal plate-shaped shield machine 18 is used to dig into the ground, the speed of digging can be increased, and the excavated earth and sand can be stored in the casing 27 of the excavator tool driving device 26 of the shield machine 18. Since the soil is discharged to the side of the shield machine 18 through the formed soil discharge port 29, the earth is not obstructed and the girder members 41, 42 are immediately behind the shield machine 18 after excavating the side shaft. , 43, ...
Combined with the fact that you can bring in and assemble,
The horizontal plate-shaped structure 48 can be constructed efficiently.

[0060]

In the invention described in claim 1 of the present invention as described above, since the earth retaining plates 30 having the protruding shape are attached to both sides of the shield machine main body 19 in the width direction, the horizontal shaft by the shield machine 18 is attached. The earth pressure and water pressure at the time of excavation can be received, and the collapse of the face can be prevented. Furthermore, the horizontal plate-shaped shield machine 18 excavates the position at a predetermined depth in the horizontal direction, and after excavating the side shaft, PC in the space formed behind
Since the horizontal plate-shaped structure 48 is constructed by inserting and connecting the girder material such as the girder, the place where the horizontal plate-shaped structure is built is the embankment structure, and the road or the road is already on the upper surface. Even in the case where a railway or the like is laid, there is an effect that the horizontal plate-shaped structure 48 can be built while avoiding the problem that the ground surface rises or sinks. Further, in the present invention, the shield machine 18 for excavating the side pit is configured as a split / assemble type in which the shield machine 18 is divided into a plurality of parts in the width direction and assembled, and a lateral side secured at a place for constructing a horizontal plate-like structure Bring the divided part of the shield machine 18 into the work space 6, insert the part from the side work space 6 into the shield installation space 11 built at a predetermined depth position of the place, and then insert the side part. The part brought into the work space 6 and the part inserted in the shield installation space 11 are connected to each other to be assembled, and the girder material for building the horizontal plate-shaped structure is divided into a plurality of parts. The divided part of the girder material is brought into the side working space 6, and the shield machine 1
Since it is inserted into the space formed at the rear of 8, and the part brought in next and the part inserted at the rear of the shield machine 18 are connected to each other to be gathered into one girder material, The work site on the side of the place where the horizontal plate-shaped structure is built can be made small, and there is an effect that the construction can be performed easily by that amount. Further, in the present invention, a horizontal plate-shaped shield machine 18
Is horizontally excavated to excavate a horizontal shaft, and the horizontal plate-shaped structure 48 is constructed along the horizontal shaft.
There is an effect that can be built accurately. Further, in the present invention, after excavating the side shaft, the divided parts of the girder material are brought into the space formed behind the shield machine 18 from the side working space 6 and assembled, and are assembled into one girder material and shielded. Machine 1
Since the girders are arranged in the horizontal direction along with the excavation of 8 and are connected to each other to construct the horizontal plate-shaped structure 48,
The parts that make up one girder can be firmly connected to each other and the girders arranged in the horizontal direction can be firmly connected, so that there is an effect that a highly rigid horizontal plate-shaped structure 48 can be built.
Moreover, in the present invention, as described above, the work site on the side of the place where the horizontal plate-shaped structure is to be built is small, and the horizontal plate-shaped shield machine 18 is used to dig into the ground. Since the excavated earth and sand are discharged to the side of the shield machine 18, the earth removal does not interfere, and after excavating the side shaft, the shield machine 1
Along with the fact that the girder material can be immediately brought in to the rear of 8 to be assembled, there is also an effect that the horizontal plate-shaped structure 48 can be efficiently constructed.

In the invention according to claim 2 of the present invention, steel sheet piles 4 and 4 are driven as the earth retaining members at predetermined intervals in the width direction of the place where the horizontal plate-shaped structure is to be built,
The earth retaining plates 30 and 30 of the shield machine 18 are attached to the sides of the shield machine body 19 so as to be close to the outside of the steel sheet piles 4 and 4, and when the shield machine 18 is dug, the steel sheet piles 4 and 4 are attached below the shield machine 18. 4 is cut and the steel sheet piles 4, 4 are pulled up by the height of the shield machine 18 when the shield machine 18 moves forward,
Since the earth retaining material is used to hold down the ground after passing through the shield machine 18, there is an effect that earth retaining can be performed more reliably by the shield machine 18 during excavation, and the construction can be performed safely.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a place where a horizontal plate-shaped structure is built.

FIG. 2 is a vertical sectional front view showing a state in which a side working space is built in the width direction of the embankment.

FIG. 3 is a vertical sectional front view showing a state where a shield installation space is built.

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

FIG. 5 is a vertical cross-sectional front view showing the process of suspending the shield machine, retracting the shield machine into the shield installation space, and assembling the shield machine.

FIG. 6 is a plan view of FIG.

FIG. 7 is a plan view showing an example of a shield machine.

8 is a cross-sectional view taken along the line AA of FIG.

9 is a cross-sectional view taken along the line BB of FIG.

FIG. 10 is a side view showing a state in which various devices for excavating the embankment and assembling the girder are provided.

11 is a plan view of FIG.

FIG. 12 is a side view showing a process of horizontally excavating a position of a predetermined depth of the embankment, assembling the girder material behind the shield machine, and constructing a horizontal plate-shaped structure.

FIG. 13 is a diagram showing only a half part of the plan view of FIG. 12;

FIG. 14 is a side view showing a process of inserting and assembling the next girder material in a space formed behind the shield machine after propelling the shield machine.

15 is a diagram showing only a half of the plan view of FIG.

FIG. 16 is a vertical cross-sectional front view showing a horizontal plate-like structure built in the embankment structure and an underground structure built accompanying it.

FIG. 17 is a side view showing a conventional technique.

FIG. 18 is a view on arrow CC of FIG.

[Explanation of symbols]

 1 Embankment where horizontal plate structure is built 2 Railroad laid on the embankment 4 Steel sheet pile that constitutes earth retaining 6 Side work space 7 Structural foundation pile 7'Addition to structural foundation pile Connected pillars 9 Track girder support piles 10 Construction girders 11 Shield installation space 12 Pier piles 13a to 13f Rails 14 Lining 15 Guide rails 16 Traction devices for divided parts of the shield machine 17 Wire ropes 18 Shield machines 19 Shield machine body 21a, 21b Excavator 26 Excavator drive 29 Discharge port 30 Earth retaining plate 31 Propulsion jack 32 Girder material insert 34a, 34b, 34c Divided part of shield machine 37 Belt conveyor for excavation 38 Similarly dump truck 39 Traction device for divided parts of girder 40 Wire wire 41, 42, 43 PC girder such as girder 46 Earth retaining material 47 Crane 48 Horizontal plate-like structure

Claims (2)

[Claims] 1. A horizontal plate-shaped structure is constructed by constructing a shield machine 18 for excavating a horizontal shaft for constructing a horizontal plate-shaped structure into a plurality of parts divided in the width direction and assembled. Side work space 6 where the divided parts of the shield machine 18 can be brought in and assembled in place
And a shield installation space 11 is built at a predetermined depth from the side working space 6 to bring the divided part of the shield machine 18 into the side working space 6, 11, the next part of the shield machine 18 is brought in, connected to the part inserted in the shield installation space 11, and this work is repeated to assemble the shield machine main body 19 continuous in the width direction of the place. The earth retaining plate 30 having a protruding shape is attached to both sides of the shield machine main body 19 in the width direction, and the excavator driving device 26 is attached to at least one side portion to form a horizontal plate-shaped shield machine 18. 18 excavates the ground in a horizontal direction, and excavates the excavated soil to the side while advancing the side shaft, and in the side working space 6, a horizontal plate shape divided into a plurality of parts. Bringing said portion of spars for creation construction, insert the portion of the spar rearwardly to form a space of the shield machine 18,
Next, the part of the girder material brought in is connected to the part inserted in the space, and this work is repeated to collect one girder material, and the girder material is horizontally moved as the shield machine 18 is dug. Arrange and connect to build a horizontal plate-like structure 48,
A method of constructing a horizontal plate-like structure in the ground, which is characterized by the above. 2. The steel sheet piles 4, 4 as the earth retaining members, at predetermined intervals in the width direction of a place where a horizontal plate-shaped structure is built.
Is placed, the earth retaining plates 30, 30 of the shield machine 18 are brought close to the outside of the steel sheet piles 4, 4, and the shield machine body 1
9 is attached to the side of the shield machine 18 and the steel sheet piles 4 and 4 are cut at the bottom of the shield machine 18 when the shield machine 18 is being dug.
The horizontal plate-like structure to the ground according to claim 1, characterized in that the steel sheet piles (4) and (4) are pulled up by the height of the shield machine (18) at the time of advancing of (8), and the ground is held down by soil retaining material after passing through the shield machine (18). How to build things.