JPH07293189A - Shield machine and construction method for underground structure - Google Patents

Abstract

PURPOSE:To make an underground structure free in length, and construct the structure corresponding to change in its cross sectional shape by excavating undergrounds by a plurality of rotary cutters arranged in front, and constructing the underground structure made of segments utilizing a work head. CONSTITUTION:Rotary cutters 6 and 7 are rotated so as to allow a natural ground to be excavated, and a machine body is advanced by a reaction from an existing work head 9 and a connection lining body 10 with each shield jack extended. Segments 1 and 15 are then carried into the space of an end cylindrical body section 2 by utilizing the work head 9, and they are pushed aside while the upper and lower peripheries of the held segment 11 are being fixed by an erector device. In this case, the coupling section of each segment 11 is coupled with the coupling section of an existing segment 11. Each segment 11 is pushed in order from the inside of one end cylindrical body section 2 to the other end cylindrical body section 2 or from both end cylindrical body sections 2 and 2. Subsequently after the connection lining body 10 has been constructed, a circular arc segment 15 is assembled so as to allow a work head 9 to be additionally provided. The connection lining body 10 and the work head 9 are kept constructed in a specified length by repeating the aforesaid processes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield machine and a method of constructing an underground structure for constructing a skeleton of an underground structure such as a large-section tunnel, an underground river, an underground storage tank.

[0002]

2. Description of the Related Art Recently, from the viewpoint of effectively utilizing underground space, plans are underway to construct large underground structures such as rivers, storage tanks, and road / rail tunnels. For this type of construction, it has been attempted to employ the open-cut method, pipe roof method, shield method, and mountain tunnel method.

[0003]

[Problems to be Solved by the Invention] The above-mentioned underground construction technique has the following problems.

<B> In the excavation method, since it occupies the ground during the construction, it has a great influence on the ground traffic, etc., and the adoption of the method is restricted.

<B> In the pipe roof construction method, the construction length is limited due to the limitation of construction accuracy, and the construction method is limited.

<C> In the shield construction method, the shield excavator becomes larger as the construction cross section becomes larger, the construction cost is increased due to the cost increase of the shield excavator, and the face having a large cross section can be stabilized. Technically difficult.

<D> When the underground structure is a tunnel for roads or railroads, it is ideal if the construction can be performed by changing the width of the skeleton at the branching point or the merging point, but such construction is currently possible. Shield machine has not been proposed yet.

<E> In the mountain tunnel method, it is difficult to construct a large underground structure in soft ground.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points. The object of the present invention is that the construction can be carried out without being restricted by the construction length, and the construction can be carried out in response to changes in sectional shape. , To provide a method for constructing a shield machine and an underground structure.

[0010]

[Means for Solving the Problems] That is, the present invention is a shield machine for constructing a frame of an underground structure, which comprises a pair of end cylinders for excavating while constructing a working shaft, and the end cylinders. And a cylindrical steel shell and an intermediate box that constitute the end tubular body, which are configured by an intermediate box portion that is integrally connected with the work pits and proceeds with the work mine while constructing the skeleton of the underground structure. A box-shaped steel shell constituting the body is continuously formed by communicating the inner space, and a plurality of rotary cutters are provided in a row on the front surface of the steel shell of the end tubular body and the intermediate box, The shield machine is characterized in that the end cylinder body of (1) is equipped with an erector device capable of extruding a segment forming the skeleton of the underground structure toward the other end cylinder body in the intermediate box body portion.

Further, according to the present invention, the steps of constructing a skeleton of an underground structure by extruding a segment from the inside of the end cylinder part of the shield machine to the intermediate box part, and the inside of the end cylinder part of the shield machine. The process of assembling the segments to construct a work mine integrated with the underground structure, and the process of digging the shield machine with the reaction force from the existing segment, characterized by repeating each of the steps, underground It is a construction method of a structure.

[0012]

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings.

<A> Shield machine 1 FIG. 1 shows an example of the shield machine 1. The shield machine 1 is composed of left and right end cylinders 2 and 2 and an intermediate box 3 that integrally connects the end cylinders 2 and 2, and has an end cylinder having a C-shaped cross section. 2, 2 open ends of the steel shell 4,
Both edges of the respective steel shells 5 and 5 of the intermediate box body 3 which are positioned in parallel in the vertical direction are connected to form a continuous space inside.
A rotary cutter 6, is attached to the steel shell 4 which constitutes each end tubular portion 2, 2.
6 is attached, and the steel shells 5 and 5 that constitute the intermediate box portion 3
A plurality of rotary cutters 7 are lined up in the inside, and the rotary cutters 6 and 7 can excavate horizontally (or vertically). The main components will be described in detail below.

<B> End Cylindrical Body Section Each of the cylindrical end tubular body sections 2 and 2 is an excavator for constructing a cylindrical work pit 9 while excavating, and equipped with a rotary cutter 6 on the front surface thereof. As shown in FIG. 2, a plurality of shield jacks 17 and an erector device 8 are provided inside thereof.
The erector device 8 includes a grip portion 12 that grips a rectangular segment 11 that forms a connection lining body 10 located between the work shafts 9, 9, a cylinder portion 13 that pushes the segment 11 toward the side, and an end cylinder. And a traveling portion 15 which is freely movable along a guide rail 14 provided in the portion 2 in the circumferential direction,
Segment 11 carried in through work pit 9 which is a work pit
Can be gripped and extruded sequentially from one end cylinder part 2 toward the other end cylinder part 2 facing each other.
It should be noted that the arcuate segment 15 that constitutes the work shaft 9 is assembled by the erector device 8 or by using a separate erector device.

<C> Intermediate Box Body The intermediate box body 3 is an excavator for constructing the lining body 10 in a straight line, and is equipped with a plurality of rotary cutters 7 on the front surface thereof, and has an existing cover inside. Equipped with a plurality of shield jacks (not shown) for obtaining a reaction force from the work body 10 and proceeding. The steel shells 5 and 5 constituting the intermediate box body portion 3 are the above-mentioned end cylinder body portion 2
The steel shell 4 is communicated with the steel shell 4 and is sized to receive the segment 11 in the steel shell 4.

<D> Excavation Route As shown in FIG. 3, it is natural that the excavated soil generated from the rotary cutter 6 is discharged to the ground through the work pit 9.
The soil excavated by the rotary cutter 7 of the intermediate box 3 is also discharged to the ground through the work pit 9 in the same manner. As the soil discharging means, a well-known transportation means such as a pipe transportation means, a screw type / belt type conveyor transportation means, a trolley transportation means or the like can be adopted.

<E> Segments The segments 15 constituting the working pit 9 are steel or concrete segments having a known arc shape as shown in FIG. 1 or a composite segment of steel and concrete, and each segment 15 is a bolt. -It is rigidly connected by the nut.
Further, the segment 11 constituting the connecting lining body 10 is a rectangular parallelepiped made of steel or concrete, or a rectangular parallelepiped made of steel and concrete as shown in FIG. 4, and is a direction (transverse direction) orthogonal to the excavation direction of the shield machine 1 ) Front and rear surfaces 11a,
Fitting portions 11c and 11d that can be fitted to 11b are formed. The fitting portions 11c and 11d are configured to have a fitting structure that allows the segment 11 to slide in the transverse direction while restraining separation in the excavation direction. Further, joint boxes 11e are provided at the upper and lower edges of both ends of the segment 11. Generally, the joint box is provided only on the inner side of the segment, but in this embodiment, the segment 11 is assembled within the end tubular portion 2. Therefore, the joint box 11e is provided on the inner and outer surfaces (front and back surfaces) of the segment 11 to cross the direction. 11 segments can be combined. Segment 1
As for the structure of No. 1 and the structures of the fitting portions 11c and 11d, the invention already applied by the present inventor and the collaborators thereof, for example, as JP-A-5-239994, can be applied.

[0018]

[Operation] Next, a method of constructing an underground structure will be described.

<B> Excavation As shown in FIG. 1, the rotary cutters 6 and 7 of the shield excavator 1
And the excavation process of excavating the natural ground and the excavation process of advancing the machine body by applying reaction force to the existing work mine 9 and the connected lining body 10 by extending the inner shield jack.

<B> Assembly of segments The segments 11 and 15 are carried into the space of the end cylinder portion 2 formed by the advance of the shield machine 1 using the working pit 9 and the connection lining is carried out in the following manner. After the body 10 is assembled, the work shafts 9 are assembled. As shown in FIG. 2, after the direction of the segment 11 held by the erector device 8 in the end tubular portion 2 is corrected to the side, the segment 11 that has been assembled last time is completed.
While pushing the upper and lower edges of the, push it to the side. At this time, the fitting portion 11c of the segment 11 to be pushed is fitted to the fitting portion 11d of the existing segment. In this manner, the segment 11 is sequentially pushed from the inside of the one end tubular portion 2 toward the other end tubular portion 2, or from the inside of the both end tubular portions 2 and 2 to construct the connection cover body 10. Next, the arcuate segment 15 is assembled and the work pit 9 is added. By repeating the above steps, the connection lining body 10 and the working pit 9 are constructed to have a predetermined length, and the connection lining body 10 is provided to the skeleton of various underground structures.

[0021]

[Embodiment 2] FIG. 5 shows another embodiment in which an underground structure 20 having a rectangular cross section is constructed using the shield machine 1 of FIG.
In this embodiment, the roof portion 21 of the underground structure 20 is constructed in the ground by using the shield machine 1 of the first embodiment. Next, the shield machine 1 is used to construct the floor slab portion 22 in parallel with the roof portion 21. The roof portion 21 and the floor slab portion 22 are configured by the connecting body of the work shafts 9, 9 and the connecting lining body 10 as in the first embodiment. Next, the roof part 2
1, the shield machine 1 is oriented vertically and side walls 23, 23 connecting the roof part 21 and the floor slab 22 are constructed while preventing the top soil from collapsing. The side wall portions 23, 23 may be formed parallel to each other, but as shown in the figure, they may be constructed by changing the facing distance in accordance with the sectional shape of the underground structure.

[0022]

[Third Embodiment] The sidewalls 23 and 23 of the second embodiment are replaced with those of the first embodiment.
The shield machine 1 may be oriented vertically to construct an underground structure 20 having a rectangular cross section.

[0023]

[Embodiment 4] In the above-mentioned embodiment, the shield machine 1 has a case in which the intermediate box portion 3 has a planar shape.
The intermediate box body portion 3 may be formed in an arcuate cross section as shown in FIG. In this embodiment, since the segment 11 is extruded into the intermediate box body portion 3 from the side to construct the connection lining body 10, the segment 11 formed according to the curvature of the connection lining body 10 is used. There is a need to.

[0024]

[Fifth Embodiment] FIG. 7 shows another embodiment in which the curved roof portion 21 of the underground structure 20 is constructed using the shield machine 1 of the fourth embodiment. After constructing the curved roof part 21, the lower part of the roof part 21 is excavated and used for various underground structures. In this embodiment, when excavating below the roof portion 21, the roof portion 21 prevents the top soil from collapsing.

[0025]

Since the present invention is as described above, the following effects can be obtained.

<B> Since the skeleton of the underground structure is constructed by excavating with the minimum necessary excavation width, the burden of excessive earth pressure on the cutting face is eliminated, the stability of the cutting face is improved, and it is protected by the shield machine. Since the skeleton of the underground structure is constructed in the space, the construction length is not restricted and the construction can be performed with high accuracy.

<B> An underground structure can be three-dimensionally constructed by constructing a roof portion, a floor slab portion, and a side wall portion of the underground structure using a shield machine. In this case, the construction can be performed according to the cross-sectional shape of the underground structure by changing the facing distance of the side wall.

<C> Since the roof lining is constructed in advance, it is possible to construct a large-section underground structure without using an auxiliary construction method even on soft ground.

[Brief description of drawings]

FIG. 1 is a perspective view of a shield machine according to a first embodiment as viewed from a cutting face side.

FIG. 2 is a sectional view of II-II in FIG.

FIG. 3 is a conceptual diagram of a shield machine for explaining an earth discharging route.

FIG. 4 is a perspective view of segments that form a connection lining body.

FIG. 5 is an explanatory diagram of a second embodiment in which an underground structure is constructed by changing the cross-sectional shape.

FIG. 6 is an explanatory diagram of Example 4 in which the intermediate box portion of the shield machine is bent in an arc shape, the left half of the drawing is a front view of the shield machine seen from the face of the face, and the right half of the drawing is a connection cover. Front view of the structure

7 is an explanatory view of another embodiment in which the shield machine 1 of FIG. 6 is used to form an underground structure only with a curved roof portion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000231198 Japan Land Development Co., Ltd. 4-9-9 Akasaka, Minato-ku, Tokyo (71) Applicant 000236610 Fudo Construction Co., Ltd. 4-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka No. 16 (72) Inventor Toshiro Kakita 1-16-14, Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd. (72) Inventor Reie Iwasaki 1-16-14, Shibuya, Tokyo Tokyu Construction Co., Ltd. (72) Inventor Yuji Asakami 1-16-14, Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd. (72) Inventor Nobuyuki Takamatsu 1-1-16, Shibuya, Shibuya-ku, Tokyo Tokyu Construction Stock In-company (72) Inventor Kazuto Hamada 2-2-8 Koraku, Bunkyo-ku, Tokyo Goyo Construction Co., Ltd. (72) Inventor Masashi Kaneko 13 13 Araki-cho, Shinjuku-ku, Tokyo Sumitomo Construction Co., Ltd. ( 72) Inventor Tetsuoka Tsuruhide 31 Ichibancho, Chiyoda-ku, Tokyo Otaka Takagumi Co., Ltd. Tokyo head office (72) Inventor Koji Ninomiya 4-9-9 Akasaka, Minato-ku, Tokyo Within Japan Land Development Co., Ltd. (72 ) Inventor Toshiaki Oku 1-2-1 Taito, Taito-ku, Tokyo Within Fudo Construction Co., Ltd.

Claims (16)

[Claims] 1. A shield machine for constructing a skeleton of an underground structure, wherein a pair of end cylinder parts for excavating while constructing a work pit and the end cylinder parts are integrally connected to each other, and work is performed. A tubular steel shell configured by an intermediate box part that digs while constructing a skeleton of an underground structure integrally with a mine, and a tubular steel shell that constitutes the end tubular part and a box-shaped steel shell that constitutes the intermediate box part And are formed continuously by communicating the inner space, a plurality of rotary cutters are provided in a row on the front surface of the steel shell of the end tubular body portion and the intermediate box body portion, one end tubular body portion of the underground structure A shield machine, comprising an erector device capable of extruding a segment constituting a skeleton toward the other end tubular body portion in the intermediate box body portion. 2. A shield machine for constructing a skeleton of an underground structure, wherein a pair of end cylinders that are excavated while constructing a working pit and the end cylinders are integrally connected to each other to perform work. A tubular steel shell configured by an intermediate box part that digs while constructing a skeleton of an underground structure integrally with a mine, and a tubular steel shell that constitutes the end tubular part and a box-shaped steel shell that constitutes the intermediate box part And are formed continuously by communicating the inner space, a plurality of rotary cutters are provided in a row on the front surface of the steel shell of the end tubular body portion and the intermediate box body portion, one end tubular body portion of the underground structure A shield machine, comprising an erector device capable of pushing out a segment constituting a skeleton toward the other end tubular body portion in the intermediate box body portion, wherein the intermediate box body portion has a planar shape. 3. A shield machine for constructing a skeleton of an underground structure, wherein a pair of end cylinder parts for excavating while constructing a working pit and the end cylinder parts are integrally connected to each other, and work is performed. A tubular steel shell configured by an intermediate box part that digs while constructing a skeleton of an underground structure integrally with a mine, and a tubular steel shell that constitutes the end tubular part and a box-shaped steel shell that constitutes the intermediate box part And are formed continuously by communicating the inner space, a plurality of rotary cutters are provided in a row on the front surface of the steel shell of the end tubular body portion and the intermediate box body portion, one end tubular body portion of the underground structure A shield machine, comprising: an erector device capable of pushing out a segment constituting the skeleton toward the other end cylinder part in the intermediate box part, wherein the intermediate box part has an arc shape. 4. Using the shield machine according to claim 1, and constructing a skeleton of an underground structure by extruding a segment from inside an end cylinder part of the shield machine to an intermediate box body part, It consists of the steps of assembling the segments in the end cylinder part of the shield machine to construct a working mine integrated with the underground structure, and the step of digging the shield machine by obtaining the reaction force from the existing segment. A method of constructing an underground structure, characterized by repeating 5. Using the shield machine according to claim 2, and constructing a skeleton of an underground structure by extruding a segment from inside an end cylinder part of the shield machine to an intermediate box body part, It consists of the steps of assembling the segments in the end cylinder part of the shield machine to construct a working mine integrated with the underground structure, and the step of digging the shield machine by obtaining the reaction force from the existing segment. A method of constructing an underground structure, characterized by repeating 6. Using the shield machine according to claim 3, and extruding a segment from the inside of the end cylinder part of the shield machine to the intermediate box part to construct a skeleton of an underground structure, It consists of the steps of assembling the segments in the end cylinder part of the shield machine to construct a working mine integrated with the underground structure, and the step of digging the shield machine by obtaining the reaction force from the existing segment. A method of constructing an underground structure, characterized by repeating 7. A step of constructing a skeleton of an underground structure by using the shield machine according to claim 1, extruding a segment from inside an end cylinder part of the shield machine to an intermediate box body part, and a shield. The process includes the steps of assembling the segments in the end cylinder portion of the excavator to construct a work mine integral with the underground structure, and the step of digging the shield machine by obtaining a reaction force from the existing segment. The method for constructing an underground structure, comprising constructing a structure for an underground structure by fitting fitting portions formed on the front and rear surfaces of the frame structure segment of (1) to an existing segment. 8. A step of using the shield machine according to claim 2, and extruding a segment from inside an end cylinder part of the shield machine to an intermediate box body part to construct a skeleton of an underground structure; The process includes the steps of assembling the segments in the end cylinder portion of the excavator to construct a work mine integral with the underground structure, and the step of digging the shield machine by obtaining a reaction force from the existing segment. The method for constructing an underground structure, comprising constructing a structure for an underground structure by fitting fitting portions formed on the front and rear surfaces of the frame structure segment of (1) to an existing segment. 9. A step of using the shield machine according to claim 3, and constructing a skeleton of an underground structure by extruding a segment from inside an end cylinder part of the shield machine to an intermediate box body part; The process includes the steps of assembling the segments in the end cylinder portion of the excavator to construct a work mine integral with the underground structure, and the step of digging the shield machine by obtaining a reaction force from the existing segment. The method for constructing an underground structure, comprising constructing a structure for an underground structure by fitting fitting portions formed on the front and rear surfaces of the frame structure segment of (1) to an existing segment. 10. The shield machine according to claim 1, wherein the segment is extruded from the end cylinder part of the shield machine to the intermediate box part to construct a skeleton of an underground structure and an end cylinder. The segments are assembled in the body to construct a work mine integrated with the underground structure, and the roof part and floor slab of the underground structure of the underground structure are constructed to face each other, and between the roof part and the floor slab. In the method for constructing an underground structure, a side wall portion having the same facing distance is constructed using the shield machine to construct an underground structure having a closed cross section. 11. The shield machine according to claim 2, wherein the segment is extruded from the end cylinder part of the shield machine to the intermediate box part to construct a skeleton of an underground structure and an end cylinder. The segments are assembled in the body to construct a work mine integrated with the underground structure, and the roof part and floor slab of the underground structure of the underground structure are constructed to face each other, and between the roof part and the floor slab. In the method for constructing an underground structure, a side wall portion having the same facing distance is constructed using the shield machine to construct an underground structure having a closed cross section. 12. The shield machine according to claim 3, wherein the segment is extruded from the end cylinder part of the shield machine toward the intermediate box part to construct a skeleton of the underground structure and the end cylinder. The segments are assembled in the body to construct a work mine integrated with the underground structure, and the roof part and floor slab of the underground structure of the underground structure are constructed to face each other, and between the roof part and the floor slab. In the method for constructing an underground structure, a side wall portion having the same facing distance is constructed using the shield machine to construct an underground structure having a closed cross section. 13. The shield machine according to claim 1, wherein the segment is extruded from the end cylinder part of the shield machine toward the intermediate box part to construct the skeleton of the underground structure and the end cylinder. The segments are assembled in the body to construct a work mine integrated with the underground structure, and the roof part and floor slab of the underground structure of the underground structure are constructed to face each other, and between the roof part and the floor slab. In addition, using the shield machine, to construct an underground structure having a closed cross section by constructing a side wall portion whose facing distance changes in accordance with the sectional shape of the underground structure, Construction method. 14. The shield machine according to claim 2, wherein the segment is extruded from the end cylinder part of the shield machine to the intermediate box part to construct a skeleton of an underground structure and an end cylinder. The segments are assembled in the body to construct a work mine integrated with the underground structure, and the roof part and floor slab of the underground structure of the underground structure are constructed to face each other, and between the roof part and the floor slab. In addition, using the shield machine, to construct an underground structure having a closed cross section by constructing a side wall portion whose facing distance changes in accordance with the sectional shape of the underground structure, Construction method. 15. The shield machine according to claim 3, wherein the segment is extruded from the end cylinder part of the shield machine toward the intermediate box part to construct a skeleton of an underground structure and the end cylinder. The segments are assembled in the body to construct a work mine integrated with the underground structure, and the roof part and floor slab of the underground structure of the underground structure are constructed to face each other, and between the roof part and the floor slab. In addition, using the shield machine, to construct an underground structure having a closed cross section by constructing a side wall portion whose facing distance changes in accordance with the sectional shape of the underground structure, Construction method. 16. The shield machine according to claim 3, wherein the segment is extruded from the end cylinder part of the shield machine toward the intermediate box part to construct the roof part of the underground structure, and Construction of an underground structure having a closed cross section by assembling a work mine integrated with an underground structure by assembling segments in a tubular body, and excavating below the roof part to construct an underground structure having a closed cross section. Method.