JPH10266231A - Embedding device and embedding method for underground structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an embedding device and embedding method capable of eliminating the labor such as repeated work and reducing the period of construction. SOLUTION: An embedding device is constituted in such a way that a cylindrical body 2 is detachably provided to an underground structure 1, a shield excavator 5 is held inside the cylindrical body 2 through an elevating device 6, and the cutter head 4 thereof is projected downwards by means of this elevating device 6. Then, a cutting-edge beam 23 is provided around the bottom wall part 1a, and water jetting devices 25 are provided to the bottom wall part 1a at four corners of the space 24 between the underground structure 1 and the cylindrical body 2, so that each of the jetting nozzles 26 thereof is projected downwards from the bottom wall part 1a, and water is jetted through the jetting nozzles 26 to the excavation place at the time of embedding work, and further an earth/sand discharging device 16 is provided. Thus, excavation is facilitated, and also by repeating without labor settlement of the underground structure 1 due to its own weight, the construction period can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for burying an underground structure such as a basement.

[0002]

2. Description of the Related Art Conventionally, an underground structure is buried by repeating excavation by a civil engineering machine and press-fitting the underground structure into the ground using a hydraulic jack or the like. That is, as shown in FIG. 8, an earth anchor (reaction force pile) 51 is driven into a predetermined position around the underground structure 50 to be buried, and the ground anchor 51 is placed on the ground between the earth anchors 51 and around the bottom wall 50 a. The underground structure 50 provided with the protrusion 52 for penetration is placed on the underground structure 50.

[0003] Next, on the upper surface of the underground structure 50, a beam 5
3 is laid so that both ends 53 a protrude outside the underground structure 50, and then a jack device 54 is arranged between both ends 53 a of the beam member 53 and the ground anchor 51. Of course, at this time, the jack device 54 is connected to the ground anchor 51 and the beam 53.

Next, the jack device 54 is operated to pull the beam member 53 downward, and press-fit the underground structure 50 into the ground. Then, the inside of the underground structure 50 is excavated using, for example, a power shovel or the like.

[0005] When the excavation is performed by the press-fitting height of the underground structure 50, the underground structure 50 is press-fitted again by the jack device 54 through the beam 53 and excavation is performed. This procedure was repeated, and the underground structure 50 was buried underground.

[0006]

However, according to the above-described method of burying an underground structure, excavation work must be performed from the outside with a power shovel, and further, the excavation work and the underground structure are pressed into the ground. The work must be repeated, and in order to maintain the posture of the underground structure in the vertical direction, it is necessary to adjust each jack device while measuring the horizontal level every time the press-fitting work is performed. There are problems such as a long construction period.

An object of the present invention is to provide an apparatus and method for burying an underground structure, which does not require repetitive work or the like and shortens the construction period.

[0008]

In order to achieve the above-mentioned object, an underground structure burying apparatus of the present invention is a burying apparatus for burying a box-shaped underground structure, wherein the underground structure is buried. A cylindrical body is detachably provided on the upper surface around the opening formed in the bottom wall portion, and an excavator having a vertical and rotatable cutter head at a lower portion is held in the cylindrical body via a lifting device. At the same time, the cutter head can be made to protrude downward from the bottom wall by the elevating device, and around the bottom wall of the underground structure, a landslide member that breaks down the soil and moves toward the excavator is provided. A water injection device is provided on the bottom wall at the four corners of the space chamber between the underground structure and the cylindrical body, and the injection nozzle is projected downward from the bottom wall, and the water injection device is attached to the water injection device during embedding work. Water from the spray nozzle None and is characterized by comprising further injected drilling position the water sediment discharge device for discharging a mixture of drilling soil.

According to another aspect of the present invention, there is provided a device for burying an underground structure, wherein the water injection device has the above configuration, and the injection nozzle, a hose for supplying water to the injection nozzle, and the injection nozzle are turned around a vertical axis. It is characterized by comprising a turning drive device and a swing drive device for swinging the tip of the injection nozzle around a horizontal axis.

[0010] Further, according to another aspect of the present invention, there is provided a device for burying an underground structure in each of the above constructions, wherein a leg is provided on a bottom wall at each of four corners of a space between the underground structure and the cylindrical body through an extension device. Are provided so as to be able to retreat downward, respectively, a water level measuring device is provided for measuring the water level injected into the space chamber, and a controller for controlling the retracting device according to a measured water level from the water level measuring device. It is characterized by having.

According to another aspect of the present invention, there is provided a method for burying an underground structure in a box-shaped underground structure. The underground structure is placed on the ground in a state where an excavator having a cutter head at a lower portion is held via an elevating device in a cylindrical body attached to the upper surface around the opened portion, and then the While rotating the cutter head of the excavator to cause the excavator to protrude below the bottom wall of the outer wall body by the elevating device, inject water from a spray nozzle provided around the bottom wall to the excavation location, and When the ground is excavated while discharging the mixture of water and earth and sand outside the excavator, and as the excavation by the cutter head proceeds, the underground structure sinks due to its own weight, around the bottom wall of the underground structure. Landslide members provided More, while drilling range corresponding to the outer peripheral surface of the underground structure, sequentially, and is characterized in that embedded in the subsurface structure in the basement. Further, another method of embedding an underground structure according to the present invention, in the above configuration, when the underground structure is embedded, the four corners of the bottom wall of the underground structure are measured based on a water level measured by a water level measuring device provided in the space chamber. The height of the underground structure is maintained in the vertical direction by separately controlling the amount of retreat of the legs provided so as to be able to retreat from the bottom wall portion and downward.

Therefore, according to the underground structure burying apparatus and method of the present invention, when burying the underground structure, excavation work is not performed from the outside by a civil engineering machine or the like.
An excavator is installed in the underground structure, and a water injection device is installed on the bottom wall at the four corners of the space chamber to perform excavation.Therefore, earth and sand in a range corresponding to the outer peripheral surface of the underground structure can be easily excavated. It is not necessary to secure the ground (construction area) around the burial place necessary for loading, unloading, and excavation of the work, and the construction area can be reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, reference numeral 1 denotes an outer wall (an example of an underground structure) of a unit-type basement manufactured in a factory or the like, which is formed in a substantially rectangular shape (box shape) in plan view. With the bottom wall 1 of the outer wall 1
The cylindrical body 2 is detachably provided on the upper surface around the opening 1b formed at the bottom of the cylindrical body 2 via a flange 2a provided at the lower part thereof. Inside the cylindrical body 2, a shield excavator (an example of an excavator) 5 having a cutter head 4 that is a vertical type and has a cutter head 4 that is rotated by a rotary driving device 3 such as an electric motor or a hydraulic motor at a lower portion, and an elevating device 6. It is held so as to be able to protrude below the outer wall body 1 through.

The cutter head 4 has a shield body 5a.
Small-diameter portion 8 which is rotatably supported on its side via a slewing bearing 7 and is provided with an external gear 8a on its outer peripheral surface.
A large-diameter portion 9 connected to a lower end portion of the small-diameter portion 8 and having a conical earth and sand intake chamber 9a formed therein;
And a cutter unit 10 attached to a lower part of the cutter unit. Further, an annular seal member 11 is provided between the earth and sand intake chamber 9a and the shield main body 5a so that water and earth and sand do not enter the inside of the shield main body 5a.

The elevating device 6 includes an upper end 2b of the cylindrical body 2.
And a pair of right and left fixedly mounted on the support plate 12 in a vertical direction and having a tip end of a rod portion 13a thereof connected to an upper end portion of a shield body 5a of the shield machine 5. And a hydraulic cylinder device 13.

In order to prevent the shield main body 5a from rotating when it is moved up and down, an engaging projection is provided on the shield main body 5a side so as to be engaged and guided by a guide groove 14 formed in the cylindrical body 2 side in a vertical direction. 15 are provided. Of course, the guide groove 14 may be provided on the shield body 5a side, and the engagement protrusion 15 may be provided on the tubular body 2 side.

Further, a sediment discharging device 16 for discharging the sediment in the sediment intake chamber 9a of the cutter head 4 below the shield body 5a to the outside is provided. The earth and sand discharge device 16 has a lower end connected to the small diameter portion 8 via a rotary joint 17 and an upper flange portion 18a fixed to the upper surface of the support plate 12, and further extended upward. A casing screw 18, a conveying screw blade 19 with a shaft spirally provided in the tubular casing 18,
A rotary drive device (for example, an electric motor, a hydraulic motor, or the like) 21 is attached to the bent portion at the upper end of the cylindrical casing 18 and rotates the transport screw blade 19 via the rotary shaft 20.

A transport pipe 22 for transporting slurry-like earth and sand, which is a mixture of water and excavated earth and sand, is connected to the upper end bent portion of the cylindrical casing 18. 2
2a is the connection end, and the other end is laid in the horizontal direction to the earth and sand discharge place.

Further, a blade beam (an example of a landslide member) 23
Along the outer periphery on the lower surface side of the bottom wall portion 1a of the outer wall body 1,
The cross section is formed in a triangular shape and provided.
It is configured so that the earth and sand can be cut down by 3a.

As shown in FIGS. 3 and 4, a water injection device 25 is provided on the bottom wall 1a at the four corners of the space chamber 24 between the outer wall 1 and the cylindrical body 2, and the injection nozzle thereof is provided. 26 is projected downward from the bottom wall 1a, and water is sprayed from the spray nozzle 26 to the excavation point during the embedding work to excavate the soil near the bottom wall 1a at the four corners where the shield excavator 5 cannot excavate. It is configured. This water injection device 25
Is a jet nozzle 26, a hose 27 for supplying water to the jet nozzle 26, a turning drive device 28 for turning the jet nozzle 26, and a nozzle portion 26a at the tip of the jet nozzle 26.
And an electric cylinder device (an example of an oscillating drive device) 29 for oscillating.

The injection nozzle 26 comprises a tubular nozzle body 26b and the nozzle portion 26a, and has water supply passages 26c and 26d therein.
The nozzle body 26b is rotatably supported around a vertical axis via a bearing 31 by a holding member 30 provided on the upper surface of the bottom wall 1a, and the nozzle part 26a is a tip of the nozzle body 26b. Are rotatably provided around a horizontal axis via a rotary joint 32. The rotation of the nozzle body 26b is performed by rotating a first gear 33 provided on the upper part of the nozzle body 26b and a motor 35 provided on the upper surface of the bottom wall 1a and rotating a second gear 34 meshing with the first gear 33. And the above-mentioned turning drive device 28.

The upper part of the nozzle body 26b and the hose 2
7 is connected via a rotary joint 36. One end of the hose 27 is inserted and supported in a hole 37a of a support plate 37 having an L-shaped cross section. The other end is connected to an external water supply device 44.

The electric cylinder device 29 is provided below the nozzle body 26b, and a rod portion 29a thereof is connected to the nozzle portion 26a so that the nozzle portion 26a can swing vertically.

On the bottom wall 1a at each of the four corners of the annular space 24, a leg 39 is provided via a retracting device 38 so as to be able to retract downward. Each of these access devices 38
Is a ball screw receiver 40 installed on the outer wall 1 side, a shaft body 41 having a ball screw groove fitted into the ball screw receiver 40 and capable of ascending and descending by rotation, and a rotary drive of the ball screw receiver. And a motor 42. Further, a water level detection sensor (an example of a water level measuring device) 43 for measuring the level of the water injected into the space chamber 24 is provided.
After the signal of the water level measured by the water level detection sensor 43 is input, the rotation drive motors 42 are controlled to adjust the amount of movement of each leg 39, and the posture of the outer wall 1 is adjusted. The controller is provided with a controller (not shown) that can be held vertically.

The operation of the above embodiment will be described below. As shown in FIG. 1, before embedding the outer wall 1, first, a cutting edge beam 23 is provided around the bottom wall 1 a of the outer wall 1, and is placed on the ground. Next, the water injection device 25 and the exit device 3
8 and the water level detection sensor 43 are installed at predetermined positions on the outer wall 1. On the other hand, at the factory or another place, the shield machine 5 is inserted into the cylindrical body 2 so that the engaging projections 15 provided on the shield main body 5a side are engaged and guided by the guide grooves 14 on the cylindrical body 2 side. After that, the earth and sand discharging device 16 is attached to the tubular body 2 side via the support plate 12,
2, a hydraulic cylinder device 13 is attached, and its rod portion 13a is connected to the shield body 5a. As described above, the cylindrical body 2 in which the shield machine 5, the earth and sand discharging device 16, and the hydraulic cylinder device 13 are incorporated is mounted on the upper surface around the opening 1 b formed in the bottom wall 1 a of the outer wall 1 by the flange portion. Attach via 2a. Thereafter, the transfer pipe 22
Is connected to the bent portion at the upper end of the cylindrical casing 18 and is laid to the place where the sediment is discharged.
Connect with

After attaching the cylindrical body 2 to the outer wall 1,
The shield machine 5 and the earth and sand discharging device 16 may be incorporated. Further, each device, the tubular body 2 and the like may be attached to the outer wall 1 at a factory or another place and moved to perform the following operation. Good.

After the completion of the above-described mounting operation, as shown in FIG. 5, while the cutter head 4 of the shield machine 5 is being rotated, the shield body 5 is
a, the cutter head 4 projects downward from the bottom wall 1a to excavate, and the water supply device 44 supplies water to the water injection device 25 while driving the turning drive device 28 and the electric cylinder device 29. , Its injection nozzle 2
By rotating and oscillating the nozzle part 26a of No. 6, water is evenly sprayed to the excavation site. At this time,
Water is also supplied into the annular space chamber 24.

The water sprayed to the outer side 1c of the bottom wall and the vicinity of the bottom wall 1a at the four corners excavates the earth and sand near the bottom wall 1a at the four corners, and mixes with the earth to form slurry earth and sand. During the rotation of the cutter head 4, the slurry-like sediment taken into the sediment intake chamber 9 a is conveyed to the conveying pipe 22 by the conveying screw blade 19, and the sediment is discharged through the conveying pipe 22. The excavation work proceeds while being discharged to the place.

Then, as shown in FIGS. 5 and 6, after excavating to a predetermined depth, the shield main body 5a is retracted by driving the hydraulic cylinder device 13. That is, when the cutter head 4 is retracted, the outer wall body 1 sinks due to the entire weight of the cutter head. In this subsidence action, subsidence is promoted by the soft ground that has been turned into slurry-like earth and sand by water injection and the weight of water supplied into the annular space chamber 24. That is, due to the cutting edge beam 23 and the water injected in a fan shape, the remaining earth and sand that could not be excavated by the above-described water injection among the earth and sand near the bottom wall 1a at the four corners indicated by phantom lines in FIG. It is collapsed inward and excavated into a shape corresponding to the outer wall 1 (see FIG. 6).

When the outer wall 1 sinks, the level of the water injected into the space chamber 24 is measured by the water level detection sensor 43, and a signal of the measured water level is inputted by the controller. The motor 42 is controlled to adjust the amount of retreat of each leg 39, and the posture of the outer wall 1 is held in the vertical direction.

By repeating this series of operations, the outer wall 1 can be buried underground. Thereafter, as shown in FIG. 7, the cylindrical body 2, the shield excavator 5, the water jetting device 25, the elevating device 6, the egress / retract device 38, the water level detection sensor 43, and the like are removed from the outer wall 1, and a predetermined internal configuration is obtained. The unit type basement is completed by incorporating the members.

Therefore, excavation work is not performed from the outside by an earth-moving machine such as a power shovel or the like. To excavate the outer wall 1
The earth and sand in a range corresponding to the outer peripheral surface of the outer wall 1 can be easily excavated, and the excavation work and the settlement of the outer wall 1 can be performed almost simultaneously, so that no labor is required and the construction period can be shortened.

In the above-described embodiment, the shield machine 5 is employed as an example of an excavator. However, another excavator having an excavation unit may be used. In the above-described embodiment, the outer wall 1 of the unit-type basement is used as an example of the underground structure. However, this may be a box-shaped base structure, and furthermore, a multi-layer structure of two or more basements. It can also be applied to underground structures on floors.

In the above-described embodiment, the electric cylinder device 29 is employed as an example of the swing drive device. However, this may be various types of cylinders such as a pneumatic cylinder.

In the above-described embodiment, the access device 38
Is composed of a ball screw receiver 40 installed on the outer wall 1 side, a shaft body 41 fitted to the ball screw receiver 40 and capable of moving up and down by rotation, and a motor 42 for rotating and driving the ball screw receiver. However, a cylinder device may be employed.

[0036]

According to the underground structure burying apparatus and method of the present invention, excavation work is not performed from the outside by a civil engineering machine or the like, an excavator is provided in the underground structure, and the bottom of the four corners of the space room is further provided. Since the excavation is provided by installing a water injection device on the wall, it is not necessary to secure the ground (construction area) around the burial place required for carrying in, unloading and excavation of the civil engineering machine, so that the construction area can be reduced. it can.

Further, the water injection by the water injection device facilitates excavation of earth and sand in a range corresponding to the outer peripheral surface of the underground structure, and softens the ground at the construction site, so that the underground structure sinks by its own weight. It will be easier. This eliminates the need for labor such as press-fitting work after the earth anchor is constructed, and the subsidence of the underground structure and the excavation work can be performed almost simultaneously, thereby shortening the construction period.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which an embedded device according to an embodiment of the present invention is attached to an underground structure.

FIG. 2 is a sectional view of the embedding device in FIG.

FIG. 3 is a sectional view taken along the line AA in FIG.

FIG. 4 is a horizontal sectional view in FIG.

FIG. 5 is a sectional view showing a method of burying the underground structure.

FIG. 6 is a sectional view showing a method of burying the underground structure.

FIG. 7 is a cross-sectional view showing an embedded state of the underground structure.

FIG. 8 shows a conventional example and is a cross-sectional view of an underground structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer wall body 1a Bottom wall 1b Opening 2 Tubular body 4 Cutter head 5 Shield excavator 6 Elevating device 16 Sediment discharging device 23 Blade beam 24 Annular space 25 Water jetting device 26 Injection nozzle 27 Hose 28 Rotating drive device 29 Electric cylinder device 38 Retraction device 39 Leg 43 Water level detection sensor

Claims (5)

[Claims] 1. A burying device for burying a box-shaped underground structure, wherein a tubular body is detachably provided on an upper surface around an opening formed in a bottom wall of the underground structure. In the body, an excavator having a vertical and rotatable cutter head at the lower portion is held via an elevating device, and the elevating device allows the cutter head to protrude downward from the bottom wall portion. Around the bottom wall of the underground structure, a landslide member that breaks down the sand and approaches the excavator is provided, and water is sprayed on the bottom wall at the four corners of the space between the underground structure and the tubular body. A device is provided to make the injection nozzle protrude downward from the bottom wall portion, and water is injected from the injection nozzle to the excavation site during the embedding work, and a mixture of water and excavated earth and sand injected at the excavation site That the earth and sand discharge device that discharges Characteristic underground structure burying equipment. 2. A water injection device comprising: an injection nozzle; a hose for supplying water to the injection nozzle; a turning drive device for turning the injection nozzle around a vertical axis; and a tip of the injection nozzle about a horizontal axis. 2. The underground structure burying device according to claim 1, further comprising a swing drive device for swinging. 3. A leg is provided on the bottom wall at each of the four corners of the space between the underground structure and the cylindrical body via an egress / retreat device so as to be able to move down and up, respectively. The underground structure according to claim 1 or 2, further comprising a water level measuring device for measuring the water level, and a controller for controlling the exit device according to the measured water level from the water level measuring device. Body burying equipment. 4. An embedding method for embedding a box-shaped underground structure, wherein a cutter is mounted in a cylindrical body attached to an upper surface around an opening formed in a bottom wall of the underground structure. The underground structure is placed on the ground while the excavator having the head is held via the elevating device, and then the excavator is moved to the bottom of the outer wall body by the elevating device while rotating the cutter head of the excavator. While projecting below the wall, water is jetted from a jet nozzle provided around the bottom wall to the excavation site, and the ground is excavated while discharging a mixture of the water and the earth and sand outside the excavator. When the underground structure sinks due to its own weight as the excavation by the cutter head progresses, a landslide member provided around the bottom wall of the underground structure causes the area corresponding to the outer peripheral surface of the underground structure to fall. While drilling, A method of burying an underground structure, wherein the underground structure is buried underground. 5. When the underground structure is buried, it is provided at four corners of the bottom wall of the underground structure and downwardly from the bottom wall based on a measured water level from a water level measuring device provided in the space chamber. 5. The posture of the underground structure is maintained in a vertical direction by separately controlling the amounts of movement of the legs that have been set.
The method for burying an underground structure according to the above.