JP2699153B2 - Construction method of underground plate-like structure and girder material for plate-like structure construction - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for constructing a horizontal plate-like structure or a vertical plate-like structure in the ground, and a girder material effective for carrying out this construction method.

[0002]

2. Description of the Related Art A shaft or shaft is excavated in the ground by an excavator, a girder material is inserted into the shaft, a backfill material is filled in a gap between the shaft and the girder material, and a horizontal plate-shaped structure or a vertical structure is formed. Techniques for building plate-like structures have been developed and are being put to practical use.

[0003]

However, in the prior art, tail voids generated when building a plate-like structure in the ground,
That is, when backfilling is performed in a gap between a horizontal shaft or a shaft and a girder material that is a material for building a plate-like structure, the following problem occurs, and the tail void cannot be reliably filled.

[0004] The backfill material flows out from both sides of the inserted girder material. A tail seal attached to the rear of the excavator is consolidated by the backfill material. Backfill material may get inside the excavator. If the cover is shallow, backfill material may erupt to the ground.

The present invention has been made in view of the above circumstances, and an object of the present invention is to improve the workability and work efficiency of filling a backfill material by reliably filling a tail void with a backfill material. It is an object of the present invention to provide a method of constructing an underground plate-like structure that can be made to work.

It is another object of the present invention to provide a girder material for building a plate-like structure capable of accurately implementing the above-mentioned building method.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a digging machine for digging a pit for constructing a plate-like structure, and providing a rear portion of the digging machine in a direction orthogonal to the digging direction of the pit. At least one of the beam members which stuck the empty back-filling injection bag to the outer surface was inserted in a direction perpendicular to the excavation direction, the
The excavator is propelled by a vertebral jack with a reaction force to the girder material.
Then, after the girder material is extruded to the rear of the excavator, the backfilling bag is filled with the backfill material to fill the gap between the pit and the girder material.

According to another aspect of the present invention, a groove is formed on at least one outer surface in a direction orthogonal to the longitudinal direction of the beam to penetrate the beam in the longitudinal direction of the beam. The backfill infusion bag is housed in the groove, and the inner surface of the backfill infusion bag is attached to the outer surface of the girder. Further, a narrow backing is formed in the groove formed on the outer surface of the girder. A plurality of infusion bags are placed side by side and attached.

[0009]

According to the construction method of the present invention, a pit for constructing a plate-like structure is excavated by an excavator. The girder is then inserted into the back of the excavator. To this girder material, an empty backfill bag is previously attached to at least one outer surface in a direction orthogonal to the digging direction of the pit with an adhesive or the like. After inserting the girder material with backfilling injection bag into the back of the excavator, push the girder material to the rear of the excavator with a propulsion jack etc. deployed on the excavator, and take a reaction force on the girder material to promote the excavator Let it.
As described above, the backfill material is filled into the backfill injection bag of the girder material extruded to the rear of the excavator, and the tail void which is a gap between the pit and the girder material is filled.

As described above, according to the construction method of the present invention, the backfill injection bag is attached to the outer surface of the girder in advance, and the girder is inserted into the rear portion of the excavator, and the girder is extruded to the rear of the excavator. After that, the backfilling bag is filled with backfill material to fill the gap between the pit and the girder material, so that the backfill material runs off, the tail seal is solidified by the backfill material, and the backfill material is removed. Eliminates all problems such as sneaking into the excavator and spilling of the backfill material to the ground. The tail void can be reliably filled with backfill material, and the workability and efficiency of filling the backfill material are improved. Can be done.

[0011] Further, in the girder for building a plate-shaped structure of the present invention, a groove having a U-shaped cross section and penetrating in the length direction of the girder is formed on the outer surface of the girder. The backfill injection bag is accommodated in the groove, and the inner surface of the backfill injection bag is adhered to the outer surface of the girder material with an adhesive or the like.

In order to build a plate-shaped structure using such a girder material with a back-filled injection bag, first, a pit for building a plate-shaped structure is excavated by an excavator.

Next, a girder material is inserted into the rear of the excavator with the back-filling injection bag empty. At this time, the backfilling bag is housed in a U-shaped groove formed on the outer surface of the girder material and the inner surface of the backfilling bag is attached to the outer surface of the girder material. Does not protrude from the girder material to be in the way, so that the girder material can be inserted smoothly.

After the girder material with the back-filled injection bag is inserted into the rear portion of the excavator, the girder material is pushed to the rear of the excavator, and the excavator is propelled by taking a reaction force on the girder material. Also at the time of pushing out the girder material, the backfill infusion bag is accommodated in the groove formed on the outer surface of the girder material, so that the girder material can be extruded smoothly.

After extruding the girder material with the backfill injection bag, the backfill material is filled with the backfill material, and the tail void is filled with the backfill material filled in the backfill material bag.

As described above, in the girder material for building a plate-shaped structure of the present invention, a groove having a U-shaped cross section is formed on the outer surface of the girder material. Since the inner surface is stuck to the outer surface of the girder, the backfill pour bag does not protrude from the girder material, and therefore, when inserting the girder material with the backfill pouch into the back of the excavator and from the back of the excavator Even when extruding, it can be performed smoothly.

Further, according to the present invention, a plurality of narrow back-filling injection bags are arranged in a groove formed on the outer surface of the girder material, and attached.

Therefore, when the girder material with the backfilling injection bag is inserted into the rear part of the excavator, and the girder material is pushed out to the rear of the excavator, the backfilling injection bag that appears in the gap between the pit and the girder material sequentially starts. By filling the backfill material, it is possible to reduce the time to release in the state where the void is generated,
This makes it possible to prevent collapse of the ground in the gap.

[0019]

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

FIG. 1 is a perspective view showing an example of a girder material with a back-filling injection bag, and FIG. 2 is an explanatory diagram showing a process of attaching the back-filling injection bag to the girder material.

In carrying out the construction method of the present invention,
The girder material 5 with backfill injection bag is used. The embodiment of the girder member 5 with back-filled injection bag shown in FIG. 1 has a cross section on both outer surfaces in a direction perpendicular to the length direction of the girder member 1 which is a main material for building a plate-like structure. A U-shaped groove 2 is formed. The beam member 1 may be made of concrete, plastic, metal, or a ceramic plate.

Three backfill injection bags 3a, 3b, 3c are housed side by side in a groove 2 formed in the beam member 1. The back-filled injection bags 3a, 3b, 3c are formed of an inflatable material such as a plastic tube. In addition, the back-filling injection bags 3a, 3b, 3c for building a horizontal plate-like structure may be cut into two sides, and the back-filling material may be injected from both ends. One end is closed and the other end is closed. A backfill material may be injected. Backfill infusion bag 3a,
The vertical plate-like structures 3b and 3c shall be closed at the side corresponding to the lower end. Further, the back-filling injection bags 3a, 3b, 3c have an inner surface adhered to an outer surface of the girder member 1, that is, a web in the groove 2 by an adhesive 4.

In manufacturing the girder member 5 with the backfill infusion bag, as shown in FIG. 2, the backfill infusion bag formed in advance in accordance with the width of the groove 2 of the girder member 1 and wound in a roll shape. 3 is fed out and cut in accordance with the length of the girder 1. On the other hand, an adhesive 4 is applied to the outer surface of the girder 1 in the groove 2, and the inner surface of the back-filling injection bag 3 cut to the predetermined size is applied to the outer surface of the girder 1 in the groove 2 via the adhesive 4. Attach to

This makes it possible to efficiently manufacture the girder member 5 with the back-filled injection bag using simple equipment.

Next, an example of a construction method for constructing a plate-like structure underground using the above-mentioned girder member 5 with a back-filling injection bag will be described.

FIG. 3 is a plan view showing a construction process of the horizontal plate-like structure, and FIG. 4 is a central longitudinal sectional view of FIG.

In the embodiment shown in these figures, a shaft 20 for constructing a horizontal plate-like structure is firstly used by a machine 10.
Digging.

In this embodiment of the excavator 10, an excavator main body 11 and excavating tools 14a,
14b, an earth removal device, a propulsion jack 17, a girder insertion portion 18, and a tail seal 19.

The excavator body 11 is formed in a flat box shape that is long in the front-rear direction. This machine 1
A substantially semi-circular partition wall 12 and a hood 13 are attached to the front end of the unit 1.

As the excavators 14a and 14b, so-called screw type with shafts are used, and two excavators are paired. A number of bits are provided on the outer peripheral surfaces of the screws of these excavators 14a and 14b, but the bits are omitted in the drawings.

The earth discharging device is provided with a plurality of screw conveyors 15 and a belt conveyor 16. The screw conveyor 15 is installed at a predetermined interval in a direction orthogonal to the direction of propulsion of the excavator 10, takes in the earth and sand excavated by the excavators 14a and 14b, and conveys it to the inside of the excavator body 11. . The belt conveyor 16 is installed below the discharge port in the row of the screw conveyors 15, and each of the screw conveyors 15
The excavated earth is received from the discharge port of the excavator 10 and is discharged to one side of the horizontal direction y orthogonal to the propulsion direction x of the excavator 10.

The propulsion jack 17 includes excavating tools 14a,
After excavating the ground at 14b, the girder 5 with the backfilling injection bag inserted into the rear part of the excavator main body 11 is pushed out, and a reaction force is applied to the girder 5 with the backfilling injection bag to remove the entire excavator 10. It is designed to be promoted.

The beam insertion portion 18 is formed at the rear of the machine body 11. The girder member 5 with the back-filled injection bag is inserted into the girder member insertion portion 18 from the side in the horizontal direction y orthogonal to the propulsion direction x of the excavator 10.

The tail seal 19 seals muddy water and the like from the rear part of the machine 11 through the gap between the excavated shaft 20 and the girder member 5 with backfill bag. .

In constructing the horizontal plate-shaped structure 21, the excavators 14a, 14b of the excavator 10 are used.
The ground is excavated, and the excavated earth and sand is taken in by a screw conveyor 15 of an earth removal device, and then delivered to a belt conveyor 16. The belt conveyor 16 discharges the received excavated earth and sand to one side of a horizontal direction y orthogonal to the propulsion direction x of the excavator 10.

While excavating the ground, the excavator body 11
An empty girder material 5 with a back-filled injection bag is inserted into the rear girder material insertion portion 18 from the side in the horizontal direction y orthogonal to the propulsion direction x of the excavator 10. The back-filled injection bags 3a, 3b, 3c in such an empty state are housed in the grooves 2 formed in the spar 1 and are adhered to the outer surfaces of the grooves 2 with an adhesive 4 so as to protrude from the grooves 2. Therefore, the girder member 5 with the back-filled injection bag can be smoothly inserted into the girder member insertion portion 18.

After excavating the ground by a predetermined amount, the plurality of propulsion jacks 17 are simultaneously extended, and the girder material 5 with the back-filled injection bag inserted into the girder material insertion portion 18 at the rear of the excavator main body 11. Is pushed out to the rear of the excavator main body 11, and the entire excavator 10 is propelled by applying a reaction force to the girder member 5 with the backfilling injection bag.

In this embodiment, when the girder material 5 with the backfilling injection bag is extruded, as shown in FIG. 4, one of the three backfilling injection bags 3a, 3b, 3c that appeared in the horizontal shaft 20. Fill the backfill material in order from Accordingly, the time for releasing the gap between the horizontal shaft 20 and the girder member 5 with backfilling injection bag can be shortened, and the collapse of the ground in the gap can be prevented.

As described above, after pushing out the girder member 5 with the back-filling injection bag and propelling the entire excavator 10, the propulsion jack 17 is reduced. Then, the empty girder member 5 with the backfill injection bag is inserted into the girder member insertion portion 18 which is a space newly formed in the rear part of the excavator body 11.

As described above, excavation of the ground, insertion of the girder material 5 with an empty backfilling bag, pushing of the girder material 5 with the backfilling bag to the back of the excavator body 11 and propulsion of the excavator 10 as described above. By repeatedly performing the work of filling the backfilling material into the backfilling injection bags 3a, 3b, 3c, the horizontal shaft 20 is dug, and the horizontal plate-like structure 21 is safely and efficiently built in the horizontal shaft 20. It is possible to do.

The excavator used in the construction method of the present invention is not limited to the embodiment shown in FIGS.

Next, an example in which a vertical plate-like structure is constructed by using the girder member 5 with backfilling injection bag in the ground will be described.

FIG. 5 is a vertical sectional side view showing a process of building a vertical plate-like structure, FIG. 6 is a front view of FIG. 5, and FIG. 7 is a cross-sectional plan view of FIG.

In the embodiment shown in these figures, the excavator 22
Is used to excavate a shaft 34 for building a vertical plate-like structure.

The excavator 22 includes an excavator main body 23, a vertical auger 26 mounted on a front portion thereof, a propulsion jack 30, a girder insertion portion 31, a backfilling device 32, and a tail seal 33. It has.

The excavator body 23 is formed in a flat box shape that is long in the vertical direction. The excavator body 23 is provided with a partition wall 24 having a substantially three-dimensional cross section at the front. Further, a hood 25 is formed at the front of the partition wall 24.

The vertical auger 26 has vertically long cutters 27a and 27b, earth discharging devices 28a and 28b, and rotary driving devices 29a and 29b for the cutters 27a and 27b and the earth discharging devices 28a and 28b. It is configured.
The cutters 27a and 27b and the earth discharging devices 28a and 28b are housed in a space surrounded by the hood 25 and the partition 24.

The cutters 27a and 27b are paired by two and excavate the ground.

The earth discharging devices 28a and 28b are configured to discharge the excavated earth and sand upward z.

The propulsion jack 30 is mounted on the machine body 23
Are installed at intervals in the vertical direction. The propulsion jack 30 pushes the girder material 5 with the back-filled injection bag inserted into the girder material insertion portion 31 to the rear of the excavator main body 23, and takes a reaction force on the girder material 5 with the back-filled injection bag to take the excavator 22 as a whole.

The girder insertion portion 31 is formed at the rear of the machine body 23. The girder member 5 with backfill bag can be inserted into the girder member insertion portion 31 from above z.

The back-filling device 32 is provided with a pipe extending from the inside of the machine body 23 to the outside and extending in the direction of the tail seal 33, and the back-filled girder with the back-filling injection bag pushed out from the girder insertion portion 31. Backfilling injection bag 3a, 3b, 3 for material 5
The back filling material can be filled in c.

The tail seal 33 seals the excavator body 23 so that muddy water or the like does not enter the excavator main body 23 through a gap between the excavated shaft 34 and the girder member 5 with backfilling injection bag.

In constructing the vertical plate-like structure, the shaft 34 is first dug.

In order to excavate the shaft 34, the ground is excavated by the cutters 27a and 27b of the vertical auger 26 of the excavator 22, and the excavated earth and sand is conveyed upward by the earth discharging devices 28a and 28b. To be discharged.

As described above, while excavating the ground, the empty girder member 5 with the back-filled injection bag is inserted from above z into the girder member insertion portion 31 formed at the rear portion in the excavator body 23. I do.
At the time of insertion of such an empty girder material 5 with a backfill infusion bag, the backfill infusion bag 3a, 3b is inserted into the groove 2 formed in the girder material 1 as in the case of the construction of the horizontal plate-shaped structure 21 described above. , 3
Since c is housed and adhered to the outer surface in the groove 2 with the adhesive 4 and does not protrude, the girder material 5 with backfill bag can be inserted smoothly.

After excavating the ground by a predetermined amount, the plurality of propulsion jacks 30 are extended at the same time, and the girder 5 with the back-filled injection bag inserted into the girder insertion portion 31 is pushed out to the rear of the excavator main body 23. Then, the entire excavator 22 is propelled by taking a reaction force on the girder material 5 with the backfilling injection bag.

As described above, the propulsion jack 30
When the girder material 5 with an empty backfilling injection bag is pushed out to the rear of the machine body 23, the backfilling device 32 is sequentially arranged from the backfilling injection bags 3a, 3b, 3c that appear in the shaft 34.
Fill the backfill material with Thereby, the shaft 34
In this case, the time for keeping the gap between the girder members 5 with the backfilling injection bag open can be reduced, and the collapse of the ground in the shaft 34 can be effectively prevented. In this embodiment, the excavator 2
By providing the backfilling device 32 in 2, the piping for injecting the backfill material can be shortened, and the workability can be improved.

After pushing out the girder member 5 with the backfilling injection bag by the propulsion jack 30 and propelling the excavator 22, the propulsion jack 30 is reduced, whereby the excavator body 2
In the space formed at the rear part of the excavator 3, the empty girder member 5 with the backfilling injection bag is inserted again from above the excavator 10.

By repeatedly performing the above-described operation, the shaft 34 is dug by the excavator 22, the girder member 5 with the backfilling injection bag is inserted into the shaft 34, the backfill material is filled, and the vertical plate-like structure is formed. 35 can be safely and efficiently constructed.

When the vertical plate-like structure 35 is constructed, the excavator is not limited to the one shown in FIGS.
What is necessary is just to have an expected function.

The back-filling injection bag is also provided on the outer surface of
Not only the backfilling injection bags 3a, 3b and 3c are arranged and attached but also a thin and contracted state when the girder material 1 is inserted, expands as the backfill material is filled, and expands with the horizontal shaft 20 or shaft. What is necessary is just to have the function to fill the gap between the beam 34 and the beam 1.

[0063]

As described above, in the construction method of the present invention, a pit for building a plate-like structure is digged by a digging machine, and at least one of the directions orthogonal to the digging direction of the pit is provided at the rear of the digging machine. Girder material with an empty backfill infusion bag attached to the outer surface of
Inserted in a direction perpendicular to the excavation direction, the reaction force on the spar
Take the excavator with a propulsion jack, push this girder material to the back of the excavator, fill the backfill infusion bag with backfill material, and fill the gap between the pit and the girder material This eliminates all problems such as runoff of backfill material, solidification of tail seal by backfill material, spilling of backfill material into the excavator, and ejection of the backfill material to the ground, and backfilling of tail void There is an effect that the material can be reliably filled, and the workability and work efficiency of filling the backfill material can be improved.

Further, in the girder material for building a plate-shaped structure according to the present invention,
A groove is formed on at least one outer surface in a direction orthogonal to the length direction of the girder material so as to have a U-shaped cross section and penetrates in the length direction of the girder material. Since the inner surface of the injection bag is stuck to the outer surface of the girder, when inserting the girder with the backfill injection bag into the back of the excavator, the backfill injection bag may protrude from the girder and get in the way. Therefore, it is possible to insert the girder material smoothly, and when pushing out the girder material with backfill infusion bag to the back of the excavator, the backfill infusion bag is in the groove formed on the outer surface of the girder material. Because it fits, it is possible to push out the girder material smoothly, and after extruding the girder material with backfill infusion bag, fill the backfill infusion bag with backfill material and fill the backfill infusion bag. The tail void can be reliably filled with the backfill material There is an effect.

Further, in the girder material for building a plate-shaped structure according to the present invention, a plurality of narrow back-filling pouches are arranged in a groove formed on the outer surface of the girder material, and are stuck together. When the girder material with a bag is inserted into the rear part of the excavator and the girder material is extruded to the back of the excavator, the backfill material is filled sequentially from the backfilling injection bag that appears in the gap between the pit and the girder material. This can shorten the time for releasing the air gap with the air gap being generated, and thereby has an effect of preventing collapse of the ground in the air gap.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a girder material with a back-filled injection bag used in the construction method of the present invention.

FIG. 2 is an explanatory view showing a manufacturing process of the girder material with a back-filled injection bag shown in FIG.

FIG. 3 is a plan view showing a process of constructing a horizontal plate-like structure using the girder material with a back-filled injection bag shown in FIG.

FIG. 4 is a central longitudinal sectional view of FIG. 3;

5 is a vertical sectional side view showing a process of constructing a vertical plate-like structure using the girder material with a back-filled injection bag shown in FIG. 1.

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a cross-sectional plan view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Girder material for plate-like structure construction 2 Groove formed in girder material 3a, 3b, 3c Backfilling injection bag 4 Adhesive 5 Girder material with backfilling injection bag 10 Dig machine for horizontal shaft excavation 11 Body for excavator 14a, 14b Excavating tool 15 Screw conveyor of earth removal device 16 Belt conveyor 17 Propulsion jack 18 Girder material insertion portion 20 Horizontal shaft 21 Horizontal plate-like structure 22 Excavator for shaft excavation 23 Excavator main body 26 Vertical auger 27a, 27b Cutters 28a, 28b earth removal device 30 propulsion jack 31 girder insertion part 32 backfilling device 34 shaft 35 vertical structure

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masami Inoue 1-44-2 Shinkawa, Chuo-ku, Tokyo Inside Taitoyo Construction Co., Ltd. (56) References JP-A-58-58395 (JP, A)

Claims (3)

(57) [Claims] An excavator is used to excavate a pit for building a plate-like structure, and an empty backfill infusion bag is attached to a rear portion of the excavator on at least one outer surface in a direction orthogonal to the excavation direction of the pit. insert the spar in a direction perpendicular to the excavation direction, the
The excavator is propelled with a propulsion jack by taking a reaction force to the girder material.
Was, after extrusion the spars rearward excavator, said filled with back-filling material into the back-filling injection bags, ground plate-like structure, characterized in that to fill the gap between anti and spar construction Method. 2. A groove is formed on at least one outer surface in a direction perpendicular to the length direction of the girder material and has a U-shaped cross section and penetrates in the length direction of the girder material. A girder material for building a plate-like structure, characterized in that the girder material is housed and the inner surface of the back-filling injection bag is attached to the outer surface of the girder material. 3. A girder for building a plate-like structure according to claim 2, wherein a plurality of narrow back-filling pouches are arranged in a groove formed on the outer surface of the girder material and stuck together. Wood.