JP3483422B2 - Underground structure burying device and burying method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burying apparatus and a burying method for 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. 7, ground anchors (reaction force piles) 51 are driven into predetermined positions around the underground structure 50 to be buried, and the ground between the ground anchors 51 is surrounded by the bottom wall portion 50a. The subterranean structure 50 provided with the penetration projections 52 is placed.

Next, the beam member 5 is formed on the upper surface of the underground structure 50.
3 is hung so that both end portions 53a thereof project to the outside of the underground structure 50, and then the jack device 54 is arranged between both end portions 53a of the beam member 53 and the earth anchor 51. Of course, at this time, the jack device 54 is in a state of being connected to the ground anchor 51 and the beam member 53.

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

When the excavation is carried out by the press-fitting height of the underground structure 50, the underground structure 50 is again press-fitted by the jack device 54 through the beam member 53. This procedure was repeated and the underground structure 50 was buried in the ground.

[0006]

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

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

[0008]

In order to achieve the above-mentioned object, an underground structure burying device of the present invention is a burying device for burying a box-shaped underground structure, wherein A cylindrical body is removably provided on the upper surface around the opening formed in the bottom wall, and the vertical body and the excavator having a vertically rotatable cutter head are held in the cylindrical body through a lifting device. With this lifting device, the cutter head can be made to project downward from the bottom wall portion, and the landslide member and the landslide device are provided at the four corners of the bottom wall portion of the underground structure to provide the landslide device. Between the body and the tubular body
Forming a communication path for communicating the space room with the excavation site outside the bottom wall of the underground structure, and supplying water to the space room at the time of burying work, and the supplied water is the communication path. It is characterized in that it is equipped with a sediment discharging device for removing the mixture of water and excavated soil that is guided to the excavation site.

Further, in another underground structure burying device of the present invention, in the above structure, the landslide device swings around the first swing support portions in the horizontal axis direction provided at the lower four corners of the landslide member. The first cut beam provided movably, the second cut beam connected to the swing side end portion of the first cut beam via the second swing support portion, and the first cut beam in the vertical direction. And a urging member for urging the second cut beam upwards across the bottom wall portion and the second cut beam. is there.

Furthermore, another embedding device for an underground structure of the present invention is, in each of the above-mentioned constitutions, a leg body via a retracting device on bottom walls at four corners of the space chamber between the underground structure and the tubular body. Each of which is provided to be able to move downward and downward, a water level measuring device for measuring the water level injected into the space chamber is provided, and a controller for controlling the moving device according to the measured water level from the water level measuring device. It is characterized by having.

In order to achieve the above-mentioned object, the underground structure burying method of the present invention is a burying method for burying a box-shaped underground structure, which is first formed on the bottom wall of the underground structure. The above-mentioned underground structure is placed on the ground in a state where the excavator having the cutter head at the bottom is held via the lifting device in the cylindrical body attached to the upper surface around the opened opening, and then the above While the cutter head of the excavator is rotated, the excavator is projected downward from the bottom wall portion of the outer wall body by the lifting device, and the water supplied into the space between the underground structure and the tubular body is Through the communication passage formed in the structure or tubular body, lead to the excavation site, and excavate the ground while discharging the mixture of water and earth and sand out of the excavator,
When the underground structure subsides due to its own weight as the excavation by the cutter head progresses, the bottom wall of the underground structure
By the collapsing soil breaking member and sediment were provided at four corners device, while drilling range corresponding to the outer peripheral surface of the underground structure, sequentially, and is characterized in that embedded in the subsurface structures underground .

Further, another underground structure burying method of the present invention is, in the above-mentioned constitution, at the time of burying the underground structure, based on a measured water level from a water level measuring device provided in the space chamber, a bottom wall of the underground structure. It is characterized in that the posture of the underground structure is maintained in the vertical direction by separately controlling the amount of movement of the legs that are provided at the four corners of the section and downward from the bottom wall, respectively. .

Therefore, according to each of the above inventions, when burying an underground structure, 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 a landslide member is provided around the bottom wall. Along with the provision of a landslide and a landslide device at the four corners of the bottom wall for excavation, it is possible to easily dig the range of soil corresponding to the outer peripheral surface of the underground structure, and to carry in, unload, and excavate the civil engineering machinery. It is not necessary to secure the ground (construction area) around the burial site, and the construction area can be reduced.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. As shown in FIG. 1 and FIG. 2, reference numeral 1 denotes an outer wall body (which is an example of an underground structure) of a unit type basement manufactured in a factory or the like, which is formed in a substantially square shape (box shape) in plan view. In addition, the bottom wall portion 1 of the outer wall body 1
The tubular body 2 is detachably provided on the upper surface around the opening 1b formed in a through a flange portion 2a provided at the lower portion thereof. A shield machine (an example of an excavator) 5 which is a vertical type and has a cutter head 4 which is a vertical type and which is rotated by a rotary drive device 3 such as an electric motor or a hydraulic motor in a lower portion thereof is provided with an elevating device 6. It is held so that it can be protruded below the outer wall body 1 via.

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

The lifting device 6 comprises an upper end 2b of the tubular body 2.
And a pair of left and right support plates 12 that are fixed to the support plate 12 in the vertical direction and the tip end of the rod portion 13a is connected to the upper end of the shield body 5a of the shield machine 5. It is composed of a hydraulic cylinder device 13.

In order to prevent the shield body 5a from rotating during its up and down movement, the shield body 5a side is provided with an engagement protrusion which is engaged and guided by a guide groove portion 14 formed in the vertical direction on the cylindrical body 2 side. 15 are provided. Of course, the guide groove portion 14 may be provided on the shield body 5a side, and the engagement protrusion 15 may be provided on the tubular body 2 side.

Moreover, a blade beam (an example of a landslide member) 16
Is provided at the four corners of the bottom wall portion 1a of the outer wall body 1 with a triangular cross section and the landslide device 17 is provided at the four corners of the bottom wall portion 1a. While excavating a range corresponding to (while excavating a range corresponding to the four corners of the outer wall body 1), the outer wall body 1 is sequentially
Is configured to be buried underground.

The landslide device 17 is shown in FIGS.
As shown in FIG. 1, a first swing shaft (an example of a first swing support portion) 1
8, a first cut beam 19, a second swing shaft (an example of a second swing support portion) 20, a second cut beam 21, a hydraulic cylinder device (an example of a cylinder device) 22, and a tension spring ( (An example of a biasing member) 23.

The first swing shaft 18 is provided below the blade beam 16 at the corner, and its axial direction is oriented in the horizontal direction. The first cut beam 19 is swingably provided with the first swing shaft 18 as a base end portion, and the shape thereof is adjacent to the blade beams 16 toward the tip end.
Is formed along the inner wall surface of, and is formed in the tip end portion in parallel with the axial direction of the first swing shaft 18 and the base end portion of the second cut beam 21, and has a substantially triangular shape in a plan view.

The second cut beam 21 is connected through a second swing shaft 20 provided at the above-mentioned tip portion, and its shape is the first.
A base end portion adjacent to the tip end portion of the cut beam 19 is formed parallel to the tip end portion, and is formed substantially parallel to the inner wall surface of the adjacent blade mouth beams 16 toward the tip end portion. It is formed in parallel with the portion and has a substantially trapezoidal shape in a plan view, and the cross section thereof has a shape that gradually warps toward the tip.

The hydraulic cylinder device 22 includes a bottom wall portion 1
A cylinder supporting member 24 installed on the upper surface of a is swingably supported in the vertical direction, and the rod side is inserted through an opening 25 formed in the bottom wall 1a. The rod end 22a is connected to the second swing shaft 20. Further, the opening 25 and the hydraulic cylinder device 22 are provided.
A ring-shaped elastic seal member 25a is provided in the gap between and to maintain hermeticity.

The tension spring 23 extends over the bottom wall portion 1a and the tip end portion of the second cutout beam 21 to form the second cutout beam 21.
Is urged upward. Therefore, by driving the hydraulic cylinder device 22, the first cut beam 19 and the second cut beam 21 are pushed downward and to the shield machine 5 side, respectively, to push the earth and sand at the four corners to the shield machine 5 side. Has been done.

On the lower surface of the flange 2a of the cylindrical body 2, a plurality of cutout grooves (an example of communicating passages) 26 are formed in the circumferential radial direction, and an annular shape between the outer wall 1 and the cylindrical body 2 is formed. Space room 2
The inside of 7 is communicated with the excavation site on the outer side (lower surface side) 1c of the bottom wall portion of the outer wall body 1. During burial work,
Water is supplied into the space chamber 27 by the water supply device 28,
The supplied water is guided to the excavation site through the cutout groove 26. Further, there is provided a sediment discharge device 29 for discharging the sediment in the sediment intake chamber 9a of the cutter head 4 below the shield body 5a to the outside. This earth and sand discharge device 2
9 is a tubular casing 33 whose lower end is connected to the small diameter portion 8 via a rotary joint 30 and whose upper flange portion 31 is fixed to the upper surface of the support plate 12 and which extends further upward. , A spiral screw-equipped transport screw blade 34 provided in the tubular casing 33, and the transport screw blade 34 attached to the upper end bent portion of the tubular casing 33 to rotate the transport screw blade 34 via the rotary shaft 32. And a rotary drive device (for example, an electric motor, a hydraulic motor, etc.) 35.

Further, a conveying pipe 36 for conveying slurry-like earth and sand which is a mixture of water and excavated earth and sand is connected to the bent upper end of the cylindrical casing 33. Three
6a is the connecting end, and the other end is laid in the horizontal direction up to the earth and sand discharge place.

The bottom wall portions 1a at the four corners of the annular space are
A leg body 38 is provided in each of the lower and upper portions so that the leg body 38 can freely move in and out. Each of these exit / entry devices 37,
A ball screw receiver 39 installed on the side of the outer wall body 1 and a ball screw receiver 39 that is fitted to the ball screw receiver 39 and can move up and down by rotation.
It is composed of a shaft body 40 having a ball screw groove and a rotation driving motor 41 of the ball screw receiver. Further, a water level detection sensor (an example of a water level measuring device) 42 for measuring the water level injected into the space chamber 27 is provided in the upper part of the space chamber 27, and after the signal of the measured water level of the water level detection sensor 42 is input. A configuration is provided in which a controller (not shown) that controls each of the rotation driving motors 41 to adjust the amount of withdrawal of each leg body 38 and can maintain the posture of the outer wall body 1 in the vertical direction is provided. There is.

As shown in FIG. 1, before embedding the outer wall body 1, first , the blade beams 16 are provided at the four corners of the bottom wall portion 1 a of the outer wall body 1.
In addition to the installation , the landslide device 17 is installed and placed on the ground. Next, the retracting device 37 and the water level detection sensor 42 are installed at predetermined positions on the outer wall 1. On the other hand, the engaging protrusion 15 provided on the shield body 5a side at the factory or another place
However, after the shield machine 5 is inserted into the tubular body 2 so that it is engaged with and guided by the guide groove portion 14 on the tubular body 2, the earth and sand discharging device 29 is inserted into the tubular body 2 side through the support plate body 12. And the hydraulic cylinder device 13 is attached to the support plate 12 and the rod portion 13a thereof 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 29, and the hydraulic cylinder device 13 are incorporated is attached to the upper surface around the opening 1b formed in the bottom wall 1a of the outer wall body 1 by the flange portion. Attach via 2a. After that, the transport pipe 36 is connected to the upper end bent portion of the cylindrical casing 33 to lay down to the earth and sand discharge place, and the water supply device 28 is installed.

After attaching the tubular body 2 to the outer wall body 1,
The shield machine 5 and the earth and sand discharging device 29 may be incorporated, and further, each device, the tubular body 2 and the like may be attached to the outer wall body 1 at a factory or at another place and moved to perform the following work. Good.

After the above-mentioned mounting work is completed, as shown in FIG. 4, water is supplied from the water supply device 28 to the annular space chamber 27.
While supplying the inside of the shield excavator 5, while rotating the cutter head 4 of the shield machine 5, the shield cylinder 5 is lowered by the hydraulic cylinder device 13 to project the cutter head 4 downward from the bottom wall portion 1a for excavation. . The water supplied at this time is guided to the excavation site through the notch groove 26 and mixed with the sediment at the excavation site to form slurry-like sediment. While the cutter head 4 is rotating, the slurry-like earth and sand taken into the earth and sand intake chamber 9a is conveyed to the conveying pipe 36 by the conveying screw blades 34, and is subsequently discharged through the conveying pipe 36. The excavation work proceeds while being discharged to the place.

Then, as shown in FIGS. 4 and 5, after excavating to a predetermined depth, the shield body 5a (that is, the cutter head 4) is retracted by driving the hydraulic cylinder device 13. Next, by driving the hydraulic cylinder device 22 of the landslide device 17 and projecting the rod portion thereof,
The first cut beam 19 swings downward, and the second cut beam 21 is pushed toward the cutter head 4 side (shown by a virtual line in FIG. 4). When the rod part is retracted, the first
The cut beam 19 swings upward, and the second cut beam 21
Returns to its original position. By repeating this operation a predetermined number of times, the earth and sand in the range corresponding to the outer peripheral surface of the outer wall body 1 (shown by the phantom line in FIG. 4) are pushed and moved to the cutter head 4 side.
The second cut beam 21 also prevents the earth and sand excavated by the shield machine 5 from flowing back into a range corresponding to the outer peripheral surface of the outer wall body 1.

After this, the outer wall body 1 sinks due to its own weight (see FIG. 5). This subsidence action is efficiently performed because the subsidence becomes a slurry-like soil and the weight of the water supplied into the annular space chamber 27 facilitates the subsidence.

When the outer wall 1 sinks, the water level detection sensor 42 measures the water level injected into the space chamber 27, and the controller inputs a signal of the measured water level, and then the above-mentioned rotation drives The motor 41 is controlled to adjust the amount of withdrawal of each leg 38, and the posture of the outer wall body 1 is maintained in the vertical direction.

By repeating this series of operations, the outer wall body 1 can be buried in the ground. After that, as shown in FIG. 6, the tubular body 2, the shield machine 5, the elevating device 6, the leaving device 37, the landslide device 17, the water level detection sensor 42, and the like are removed from the outer wall body 1 to have a predetermined internal configuration. The unit type basement is completed by incorporating the members.

Therefore, the excavation work is not performed from the outside by a civil engineering machine such as a power shovel, but the shield machine 5 is provided in the outer wall body 1 and the landslide device 17 is provided at the four corners of the bottom wall portion 1a for excavation. The earth and sand in the range corresponding to the outer peripheral surface of the outer wall body 1 can be easily excavated, and the excavation work and the subsidence of the outer wall body 1 can be performed at substantially the same time, which saves the labor and shortens the construction period. it can.

In the above-described embodiment, the shield machine is used as an example of the excavator, but another excavator having an excavating portion may be used. In the above-described embodiment, the outer wall body 1 of the unit type basement is adopted as an example of the underground structure, but this may be a box-shaped basic structure, and further, a multi-layer structure of two or more basement floors. It can also be applied to the underground structure of the floor.

In the above-described embodiment, as an example of the communication passage, the plurality of cutout grooves 26 formed in the circumferential radial direction on the lower surface of the flange portion of the tubular body are adopted.
The bottom wall portion 1a may be provided with a hole to use as a communication passage.

In the above-mentioned embodiment, the leaving device 37 is used.
Is composed of a ball screw receiver 39 installed on the outer wall body 1 side, a shaft body 40 fitted to the ball screw receiver 39 and capable of moving up and down by rotation, and a rotation driving motor 41 of the ball screw receiver. However, a cylinder device may be adopted.

[0038]

According to the underground structure burying apparatus and method of the present invention described above, excavation work is not performed from the outside by a civil engineering machine or the like, but an excavator is provided in the underground structure, and the four corners of the bottom wall are further provided. Since a landslide device is provided for efficient excavation, it is not necessary to secure the ground (construction area) around the burial place necessary for loading, unloading, and excavation of the civil engineering machinery, and thus the construction area can be reduced. .

Also, the water supply softens the ground at the construction site, and the underground structure easily sinks due to the increased weight of the water supply. Therefore, it is troublesome to press-fit the earth anchor after constructing it. Moreover, since the subsidence of the underground structure and the excavation work can be performed almost simultaneously, the construction period can be shortened.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an underground structure burying device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which an burying device is attached to the underground structure.

FIG. 3 is a horizontal sectional view of FIG.

FIG. 4 is a cross-sectional view showing a method of burying the underground structure.

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

FIG. 6 is a cross-sectional view showing a buried state of the underground structure.

FIG. 7 is a cross-sectional view of an underground structure showing a conventional example.

[Explanation of symbols]

1 outer wall 1a Bottom wall 1b opening 2 tubular 4 cutter head 5 shield machine 6 Lifting device 16 blade 17 Landslide device 18 First swing shaft 19 First cut beam 20 Second swing shaft 21 Second cut beam 22 Hydraulic cylinder device 23 Extension spring 26 Notch groove 27 space room 29 Sediment discharging device 37 Leaving device 38 legs 42 Water level detection sensor

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Claims (5)

(57) [Claims] 1. An embedding device for burying a box-shaped underground structure, wherein a cylindrical body is detachably provided on an upper surface around an opening formed in a bottom wall of the underground structure, While holding the excavator having a vertical and rotatable cutter head in the lower part through the elevating device in the shape body, the elevating device allows the cutter head to project downward from the bottom wall portion, On the four corners of the bottom wall of the underground structure, a landslide member and a landslide device are installed.
Forming a communication passage that connects the space room between the underground structure and the tubular body and the excavation site outside the bottom wall of the underground structure,
In addition, while supplying water to the space room at the time of burial work, the supplied water is guided to the excavation site through the communication passage, and a mixture of water and excavated soil guided to the excavation site. An underground structure burying device, comprising an earth and sand discharging device that eliminates 2. A landslide device comprising a first cut beam provided so as to be swingable about a first oscillating support portion in the horizontal axis direction, which is provided at a lower portion of four corners of a landslide member, and the first cut beam. The bottom wall includes a second cutting beam connected to the rocking side end of the cutting beam via a second rocking support portion, and a cylinder device for vertically rocking the first cutting beam. The apparatus for burying an underground structure according to claim 1, further comprising: a biasing member that biases the second cut beam upwardly between the portion and the second cut beam. 3. The legs are provided at the bottom wall portions at four corners of the space chamber between the underground structure and the tubular body so as to be able to move downward and forward through the retracting device, and the legs are injected into the space chamber. 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 access device according to the measured water level from the water level measuring device. Body burying device. 4. A burying method for burying a box-shaped underground structure, wherein a cylindrical body attached to an upper surface around an opening formed in a bottom wall of the underground structure is firstly provided with a cutter at a lower portion. The underground structure is placed on the ground in a state where the excavator having a head is held through the lifting device, and then the excavator is lifted by the lifting device while rotating the cutter head of the excavator. While protruding downward from the wall portion, the water supplied into the space between the underground structure and the tubular body, through the communication passage formed in the underground structure or the tubular body, to the excavation site. The bottom wall of the underground structure is guided when the ground structure is excavated while discharging the mixture of water and earth and sand out of the excavator, and the underground structure sinks due to its own weight as the excavation by the cutter head progresses. breaking sediment provided four corners member and soil Sunakuzure An underground structure burying method characterized by sequentially burying an underground structure underground while excavating a range corresponding to the outer peripheral surface of the underground structure by a shining device. 5. When burying an underground structure, it is provided at four corners of the bottom wall of the underground structure and downwardly retractable based on the water level measured by a water level measuring device provided in the space room. 5. The posture of the underground structure is maintained in the vertical direction by controlling the amount of withdrawal and withdrawal of each of the legs that are lifted separately.
The method of burying the underground structure described.