JPH06221089A - Steel pipe erecting method in tunnel - Google Patents

Abstract

PURPOSE:To construct a tunnel for underground river efficiently. CONSTITUTION:A steel pipe erector 12 with welding device 15 and propelling jack 21 is located in a shaft 20 connected to a lining internal section 30 inside a lining 3, and a steel ring 61 formed in ring-shape is welded jointly to the rearmost end 6a of a steel pipe 6 by a welding device 15 in a manner that a welding robot 16 is moved around on the outer periphery 6c of it. Also the erector 12 is propelled smoothly through the rotational action of a roller 12 which supports the bottom 6d by pushing forcibly the steel pipe 6 connected to the steel ring 61 into the lining internal section 30 by the propelling jack 21 to erect the steel pipe 6 on the inside of the lining 3. Thus connecting operation of the steel ring 61 in the lining internal section 30 is not required.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a steel pipe in a tunnel suitable for use in constructing an underground river tunnel.

[0002]

2. Description of the Related Art Conventionally, in a shield tunnel, a segment made of concrete or the like is lining by connecting a plurality of segments along the tunnel circumferential direction so that the earth pressure applied from the outer peripheral side can be supported as an external pressure. There is a way to build. By the way, recently, as a flood prevention measure in urban areas, a tunnel has been constructed in a relatively deep underground by the shield construction method, and when raining, the amount of rainwater exceeding the drainage capacity of rivers, drainage channels, etc. It has been proposed to prevent rainwater from spilling over the ground by treating the wastewater as an underground river. In such underground river tunnels, it is expected that a large internal pressure will occur in the tunnel cross section due to the water head difference or the water pressure due to the impact of the inflow of rainwater. Therefore, when the internal pressure is applied, tensile force acts on the lining along the tunnel circumferential direction, and as a result, the tightened state of bolts between adjacent segments is applied to the tensile force. It is expected that there is a risk that the segment joint part, that is, a part of the lining will be broken in the form of breaking without being able to withstand it, leading to water leakage. Therefore, a method of building a steel pipe formed by connecting steel plates along the circumferential direction of the tunnel on the inner side of the cross section of the lining by the segment as a lining for supporting the internal pressure separately from the lining by the segment Is being considered.

[0003]

However, in order to build a steel pipe in such a tunnel, in order to connect a plurality of steel plates, which are the constituent materials of the steel pipe, in the circumferential direction of the tunnel, the Some equipment and facilities are required for transportation, installation, and welding, but since a very limited working space is formed in the tunnel section of the shield tunnel, such equipment and facilities are required. There is a fear that sufficient functionality will not be obtained because the type is limited to the size of the tunnel cross section. Further, welding is the most versatile joining method for such steel plates, but in tunnels where the ventilation capacity is smaller than the size of the tunnel cross section, it is not possible to weld steel plates inside the pit of the tunnel. Since it is dangerous, it is necessary to newly install ventilation equipment corresponding to the welding length of the steel sheet, and such a ventilation equipment further disadvantageously narrows the tunnel cross section. Therefore, in view of the above circumstances, the present invention eliminates steel pipe construction work such as steel plate welding in a tunnel cross-section when building a steel pipe for supporting an internal pressure on the inner side of a lining for supporting earth pressure by the ground. The present invention provides a method for building a steel pipe in a tunnel.

[0004]

Means for Solving the Problems That is, the present invention provides a steel ring in a shaft (20) which is in communication with an inner space (30) of a tunnel lining (3) capable of supporting earth pressure by the ground (2). A joining means (15) and a steel ring pushing means (21) are provided, and a steel ring (61) formed in a predetermined length in the shaft (20) is attached to the tunnel lining (3).
The steel ring joining in which the steel ring joining means (15) joins to the tail end (6a) of the steel ring joined body (6) in a state of being pushed in, and the steel ring (61) is newly joined. The body (6) is fitted with the steel ring pushing means (2
1) the inner space (3) of the tunnel lining (3)
0), and the steel ring joined body (6) to which the steel ring (61) is newly joined is built in the lining (3). Further, a steel ring guide member (11) is provided in the inner space (30) of the tunnel lining (3), and an invert portion (3) of the tunnel lining (3) is provided.
The plurality of steel ring guide members (6) are arranged side by side in the tunnel axial direction so as to be rotatable with respect to b), and the steel ring guide member (6) is pushed during the pushing operation of the steel ring joined body (6) by the steel ring pushing means (21). The steel ring bonded body (6) is fed toward the inner space (30) of the tunnel lining (3) through the rotating operation of (11).
The numbers in parentheses () indicate the corresponding elements in the drawings for the sake of convenience, and therefore the present description is not limited to the description in the drawings. The same applies to the following action columns.

[0005]

With the above structure, the joined steel ring (6)
Through its steel ring joining means (15) to its tail (6
It is pushed into the inner space (30) of the tunnel lining (3) via the steel ring pushing means (21) while being extended in the shaft (20) by joining a new steel ring (61) to a). As a result, it acts so as to sequentially propel the inside space (30) of the tunnel lining (3). Further, the steel ring joined body (6) fed into the inner space (30) of the lining (3) through the rotation operation of the steel ring guide member (11) is an invert portion (3b) of the tunnel lining (3). It propels in the inner space (30) of the tunnel lining (3) without contacting it.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional side view showing an example of a tunnel under construction using the steel pipe erection method for a tunnel according to the present invention, FIG. 2 is a sectional view taken along the line II and II in FIG. 1, and FIG. II
FIG. 4 is a cross-sectional view taken along arrows I and III, and FIG. 4 is a diagram showing a construction procedure of the tunnel shown in FIG.

The tunnel 1 for the underground river under construction is shown in FIG.
Alternatively, as shown in FIG. 3, there is a lining 3 which is a tunnel lining formed in a rollover cylindrical shape in the ground 2 so as to extend in the directions A and B which are the digging direction. Is
In the excavation tunnel 2s formed in the ground 2 in the direction of the arrow A from the shaft 20 dug down in the ground 2 in the direction of the arrow A, the shape of the rollover cylindrical shape along the outer periphery of the excavation tunnel 2s is formed. Is built to form. Therefore, in the lining 3, the lining inner cross section 30 in the form of a tumbling column as an inner space of the lining 3 communicates with the vertical shaft 20 through the pit wall 20b of the vertical shaft 20 which is the transmission pit mouth of the tunnel 1. The lining 3 is shaped like an erector of the shield device,
A plurality of segments 31, which are connected along the direction of arrows C and D in the circumferential direction of the tunnel and arranged in a torus shape, are arranged along the direction of the tunnel. The excavation tunnel 2s has a width L1 in the B direction and a predetermined winding thickness L3 in the arrow E and F directions, which are tunnel cross-sectional directions, and is sequentially connected from the arrow B direction to the arrow A direction in FIG. It is built by being built inside. Each segment 31 is composed of a precast concrete slab that is formed in a block shape that draws an arc along the outer circumference of the excavation tunnel 2s, and is adjacent to the arrow A, B direction and the arrow C, D direction. Segment 3
Between 1 and 31, fastening bolts 5 are appropriately arranged together with the water blocking material by an amount determined by the design specifications of the tunnel 1. That is, the lining 3 does not allow the pore water in the ground 2 to enter the lining 3 through the connection points between the plurality of segments 31 forming the lining 3, and the earth pressure applied by the ground 2 That is, the plurality of segments 31 are integrally connected so that they can support the external pressure.

As shown in FIG. 1 or 3, on the arrow E direction side, which is the inner side in the tunnel cross-section of the lining 3, a steel pipe 6 which is a metal internal pressure support cylinder and is formed in a cylindrical shape is The base end 6a, which is the side edge in the direction of arrow B in FIG. 1, is arranged in the vertical shaft 20 as the rearmost end of the steel pipe 6, and is a lining which is the inner space of the lining 3 already formed and formed from the vertical shaft 20 position. Inner section 3
0 is being pushed into the lining in the direction of the arrow A, and is being built and disposed in the inner surface 30 of the lining, and the steel pipe 6 has an arc plate shape along the inner peripheral surface 3a of the lining 3. A steel ring 61 formed by welding a steel plate, which is a rigid member of an eggplant shape, in a ring shape having a width L4, which is a predetermined length, is sequentially connected by welding in the directions of the arrows A and B, which are the axial direction of the tunnel. The steel ring 61 is formed so as to be freely stretched by the above-mentioned steel ring 61. The steel pipe 6 is the inner peripheral surface 3 of the lining 3.
A gap 10 having a width L2 is formed between the steel pipe 6 and the lining 3
The steel pipe 6 is formed in an annular shape as an insulating region with
The steel pipe 6 has a shape in which a tunnel space 9 having an overturning columnar shape is formed inside itself, and the steel pipe 6 includes a plurality of steel rings 61 in which rainwater flowing through the tunnel space 9 constitutes the steel pipe 6. The steel pipe 6 is connected and integrated by welding or the like so that water does not leak to the outside of the tunnel space 9 from the space, and the steel pipe 6 intersects with the paper surface of FIG. 1 shown in the arrow C and D directions in FIG. It is configured so that it can support the internal pressure acting from the tunnel space 9 toward the arrow F direction side, which is the outer side in the tunnel cross-sectional direction, in the form of a predetermined tensile strength in the direction.

By the way, at the invert 3b portion of the lining 3, as shown in FIG. 1 or 3, the lining 3 and the steel pipe 6 are provided.
The guide rollers 11 as guide members for feeding the steel pipe 6 by the steel ring 61 into the lining inner cross section 30 in the form of being arranged in the gap 10 formed with the bottom 6d of the In the form of being rotatable in the directions of arrows G and H with respect to the invert 3b portion, and in the embodiment, five each along the directions of arrows C and D, which are the circumferential direction of the tunnel,
A plurality of guide rollers 11 are formed at predetermined intervals in the directions of the arrows A and B, which are the axial directions of the tunnel, and each guide roller 11 has a groove extending in the directions of the arrows A and B at the center thereof. The steel pipe 6 is slidably supported in such a manner that it is attached to an appropriate one of the fastening bolts 5 connecting between the segments 31, 31 that are adjacent to each other in the directions of arrows A and B via the guide member 11a that is formed. Is configured to be able to. Further, as shown in FIG. 1, the guide roller 11 temporarily supports the steel pipe 6 portion which is still arranged in the vertical shaft 20, and slidably supports the steel pipe 6 portion. The support material 11b is mounted in a small quantity.

On the other hand, at the bottom 20a of the shaft 20, as shown in FIG. 1, a steel ring 61 is welded to the base end 6a which is the rearmost end of the steel pipe 6 already formed, and this is added. A steel pipe erector 12 for pushing into the lining inner cross section 30 is provided.
It has a frame 13 which can receive one steel ring 61 from the upper side thereof and can send the received steel ring 61 to the arrow A direction side. In the left part of the frame 13 in FIG. 1, there is a base end 6a which is the rearmost end of the steel pipe 6 which is a steel ring joined body already formed and which is shown on the right side edge in FIG.
The welding device 15 which is a steel ring joining means for welding the left edge of the steel ring 61, which is the tip edge of the steel ring 61 joined to the base end 6a in the following manner, forms an annular shape along the outer peripheral surface 6c of the steel pipe 6. It is provided in an eggplant shape, and the welding device 15 has a steel pipe 6
The welding robot 16 capable of welding the connecting portion of the steel ring 61 and the steel ring 61 from its outer peripheral side is capable of orbiting along the outer peripheral surface 6c of the steel pipe 6, and the contact portion 16a shown at the lower end of FIG. On the other hand, the guide ring 15a of the welding device 15 is fitted into the guide ring 15a so as to be retractable.

At the lower portion of the frame 13 of the steel pipe elector 12, there is provided a positioning guide 17 formed in a pedestal shape along the bottom portion 6d so that a new steel ring 61 which becomes the steel pipe 6 can be mounted and supported. The steel ring 61 mounted on and supported by the positioning member 17 can be positioned at a position where it can be aligned with the steel pipe 6, and can be moved up and down through support jacks 171 and 171 provided on the lower side of the positioning guide 17 in FIG. The positioning guide 17 is provided in the shape of the support jack 1.
The steel ring 61 is mounted and supported by the lifting and lowering operations of 71 and 171 or the supporting state is released. Further, on the right part of FIG. 1 of the frame 13, a propulsion jack 21 which is a steel ring pushing means is provided along the end surface shape of the steel pipe 6, that is, in the direction of arrows C and D which is the circumferential direction of the tunnel, as shown in FIG. A plurality of main bodies of each propulsion jack 21 are provided so as to be movable in the directions of arrows A and B in a form of being lined up along each other. The reaction force seat 22 supported by the pit wall portion is provided so as to be capable of projecting and retracting in a desired shape. At the left end of FIG. 1 on the main body side of each propulsion jack 21, as shown in FIG. 2, a guide press formed in an annular shape so as to press the steel pipe 6 or a steel ring 61 newly joined to the steel pipe 6. The ring 23 is the propulsion jack 21.
The steel pipe 6 is movably connected and mounted in the directions of arrows A and B through the steel pipe 6, and the steel ring 61 newly connected to the base end 6a of the steel pipe 6 has a press ring 23 and a reaction force seat 22.
It is configured such that it can be pushed into the plurality of propulsion jacks 21 in the direction of the arrow A through the inside of the lining inner cross section 30 by the stroke of the propulsion jacks 21.

Since the tunnel 1 has the above-mentioned structure, the tunnel 1 can be communicated with other rainwater channels such as rivers or drains other than the tunnel 1 when the construction is completed. Rainwater intake ports are provided at a plurality of locations along the directions of the arrows A and B, which are the axial direction of the tunnel, in a freely openable and closable manner, and by opening and closing the rainwater intake ports, the rainwater flows through the tunnel space 9. Or build it so that it can be stopped. Therefore, first, an appropriate vertical shaft 20 is dug into the ground 2, and a shield device is started from the vertical shaft 20 so that a river other than the tunnel 1 in the ground 2 or another rainwater channel such as a drainage channel. The excavation shaft 2s is excavated and formed at a deep position, and the segment 3 is formed inside the shield device via an erector or the like.
Connect multiple 1s along the circumference of the tunnel,
The lining 3 is constructed and extended by arranging the shield device following the shield device and building it in the excavation tunnel 2s. As a result, the tunnel 1 has a configuration in which rainwater can flow into the tunnel space 9 after the construction is completed from the rainwater canal other than the tunnel 1 through the rainwater intake port with a head difference. Built in. Then, an appropriate backing material 39 corresponding to the property of the ground 2 is filled on the side of the lining 3 in the direction of the arrow F, which is the outer side in the tunnel cross-section direction, while performing the injection work in the rear of the shield device (direction of the arrow B). By doing so, the lining 3 is fixed to the ground 2 as the first lining having a shape capable of supporting the earth pressure of the ground 2 in the tunnel 1.

When the lining 3 is formed and constructed by connecting the plurality of segments 31 in this manner,
Of the fastening bolts 5 arranged to connect between the segments 31, 31 that are adjacent to each other in the directions of the arrows A and B, which are the direction of the tunnel axis, in the embodiment, the invert 3b of the lining 3 is used.
The guide roller 1 is arranged in five parts although it is arranged in part.
The guide member 11a is mounted on the fastening bolt 5 at each connection point between the segment rings. Then, in this state, in the lining inner cross section 30 which is the inner space of the lining 3, a plurality of guide rollers 11, that is, five guide rollers 11 arranged in the tunnel circumferential direction in the embodiment, are provided near the bottom of the lining 3. The bottom portion 6d of the steel pipe 6 which is arranged so as to be arranged in a predetermined direction corresponding to the ring width L1 of the segment 31 in the direction and is pushed into the lining inner cross section 30 later. Each of them is prepared so as to be rotatable in the directions of arrows G and H with respect to the invert 3b so that it can be fed to the inner cross section 30. In order to prepare the guide roller 11 in the lining inner cross section 30,
By using the fastening bolts 5 to connect the adjacent segments 31 to each other, it is possible to simply and accurately arrange the guide rollers 11 at predetermined positions without separately performing leveling or the like for positioning the guide rollers 11. Can be set up.

When the construction of the lining 3 which is the first lining is completed in this way, the steel pipe 6 is formed on the inner surface 30 of the lining, which is the inner space of the lining 3, along the inner peripheral surface 3a thereof. By arranging the built-in structure, a second lining for supporting the internal pressure generated in the tunnel 1 is constructed. In addition, steel pipe 6
Are arranged in the lining inner cross section 30 so as to form a gap 10 having a width L2 with the inner peripheral surface 3a of the lining 3, and the steel pipe 6 is installed in the gap 10. After the disposition, a suitable cushioning material that can serve as an elastic member after the laying is provided in the gap 1
Filling is performed in the form of a width L2 corresponding to 0.

In order to build and arrange the steel pipe 6 in the lining inner cross section 30 which is the inner space of the lining 3, first, as shown in FIG. A steel plate, which is a constituent member of the steel ring 61 and has a width corresponding to the circumferential length of the steel ring 61, which is a new steel ring to be joined to the steel pipe 6, forms a predetermined length L4.
Assembled into a ring shape by welding in the J direction, and thereby a one-piece steel ring 61 is molded. Then, the steel ring 61 assembled in a ring shape in the working yard 27 is suspended and supported by a suspending means 29 such as a crane or a hoist as shown by a dashed line in FIG.
By passing through the steel pipe erector 12, the welding device 1 is passed through the steel pipe erector 12 by descending the inside of the steel pipe erector 12.
5, a steel ring 61 is welded to the base end 6a of the steel pipe 6 already formed by the above method, and the steel pipe 6 to which the one-piece steel ring 61 is newly welded is sequentially inserted into the lining inner cross section 30 by an arrow. The built-in length of the steel pipe 6 is extended by propelling the steel pipe 6 in the direction A by pushing it in.

Now, for example, at the bottom 20a of the shaft 20, as shown in FIG. 4, the base end 6a shown at the end of the steel pipe 6 in the direction of the arrow B is the welding robot 16 of the welding device 15. It is assumed that it is arranged at a position corresponding to the orbiting position and that the pushing work for one step in the steel pipe erector 12 has already been completed. Therefore, first, the steel pipe erector 1
2 is prepared from the upper side of the frame 13 in such a shape that a steel ring 61 to be newly added to and joined to the steel pipe 6 can be received. Therefore, first, as shown in FIG. 4, by driving the ram 21a backward, the propelling jack 21 is brought into the most contracted state, whereby the guide press ring 23 is moved in the direction of the arrow B, and the frame 13 is moved.
An opening 13a for receiving the steel ring 61 is formed in the upper part of the.
Then, the positioning guide 17 is raised via the support jack 171 to a predetermined position where the steel ring 61 can be aligned with the steel pipe 6, and in this state, the work yard 27 is first moved.
The steel ring 61, which is formed in a ring shape and is suspended and supported by the suspension means 29, is put into the frame 13 through the receiving port 13a. Here, when the supporting state of the suspending means 29 is released, the steel ring 61 is at the lower side in FIG. 4, that is, the portion to be the bottom portion 6d of the steel pipe 6 and the right side surface in FIG.
The portion that becomes the base end 6a of the is transferred to the steel pipe erector 12 side in a form of being supported by the positioning guide 17 and the guide press ring 23.

In this state, the ram 21 of the propulsion jack 21
When a is driven to protrude, the propulsion jack 21 moves to the reaction force seat 2
The steel ring 61 in the frame 13 is connected to the base end 6 of the steel pipe 6 through the guide press ring 23 in a manner to obtain a reaction force to
It is pushed and moved in the direction of arrow A until it comes into contact with a. Then,
The steel ring 61 is attached to the positioning guide 17 formed in a pedestal shape so that the steel ring 61 can be mounted and supported, and the bottom portion 6d is provided behind the positioning guide 17.
Since the portion to be formed is transferred to the steel pipe erector 12 in a supported state, it is already positioned so that it can be aligned with the steel pipe 6 and its height and a predetermined position in the direction intersecting the plane of FIG. As shown in FIG. 1, the steel ring 61 is aligned in such a manner that the arrow A direction side end edge is abutted with the base end 6a which is the arrow B direction side edge of the steel pipe 6. , The guide ring 15 of the welding device 15
It is placed in a. Therefore, the welding robot 16 of the welding device 15 is caused to project and move until it comes into contact with the outer peripheral surface 6c of the steel pipe 6, and the contact portion 16a is brought into contact with the joint between the steel pipe 6 and the steel ring 61. The welding robot 16
Is made to circulate along the outer peripheral surface 6c of the steel pipe 6, and the steel ring 61 forming the rear end of the steel pipe 6 and the steel ring 61 newly joined thereto are joined by welding.
That is, a new steel ring 61 is joined to the base end 6a which is the rearmost end of the steel pipe 6 whose leading side is already built and arranged in the lining inner cross-section 30, and thereby the steel pipe 6 is extended to the length of the steel ring 61. It is extended by L4 minutes.

In this way, when the length of the steel pipe 6 is extended by L4 which is one ring of the steel ring 61, the contact portion 16a of the welding robot 16 is retracted and retracted from the outer peripheral surface 6c of the steel pipe 6. And next, the ram 2 of the propulsion jack 21
When 1a is driven to project by the stroke corresponding to the length L4 of the steel ring 61, as shown in FIG. 2, the propulsion jacks 21 arranged in a line along the tunnel circumferential directions C and D. Moves the entire steel pipe 6 in the direction of arrow A in a manner to uniformly press the base end 6a of the steel pipe 6 to which a new one-ring steel ring 61 is added via the guide press ring 23. Thus, the steel pipe 6 to which the steel ring 61 for one ring is newly joined is pushed toward the lining inner cross section 30 by the length L4 of the steel ring 61. In this way, when pushing one ring of the steel pipe 6 into the lining inner cross section 30 via the propulsion jack 21, the positioning guide 17 is contracted to drive the support jack 171.
When the steel pipe 6 is released from the supporting state of the portion of the steel pipe 61 which is the last end of the steel pipe 6, the steel pipe 6 moves more smoothly.

When the steel pipe 6 is pushed into the lining inner cross section 30 by the length L4 of the newly joined steel ring 61, the bottom portion 6d of the steel pipe 6 is the invert 3b portion of the lining 3. , A guide roller 11 rotatably provided in the gap 10 around the respective inverts 3b in the directions of arrows G and H with respect to the respective axes.
The steel pipe 6 is smoothly propelled and moved in the lining inner cross section 30 by being rotated into the lining inner cross section 30 by being rotated by the guide roller 11. You can do it. That is, the steel pipe 6 pushed into the lining inner section 30 by the propulsion jack 21.
Through the guide rollers 11 that are a plurality of steel ring guide members arranged in the inner cross section 30 of the lining, and are smoothly brought into contact with the inverts 3b by the rotating operation of the guide rollers 11 inside the lining. Since the cross section 30 is fed in the direction of the arrow A, the steel pipe 6 is impeded from propelling it in the form of being subjected to frictional resistance by the invert portion 3b, or the outer peripheral surface 6c of the steel pipe 6 and the inner peripheral surface 3a of the lining 3 are reinforced. However, there is no risk of damaging one another by sliding in contact with each other. In addition,
At this time, a small number of guide rollers 11 supported by an appropriate support member 11b temporarily provided at the bottom 20a of the vertical shaft 20 have the same function. Further, since the steel pipe 6 configured by connecting a plurality of steel rings 61 in the axial direction of the tunnel is a member for supporting the internal pressure in the tunnel 1, its thickness is relatively thin, and therefore the steel pipe is 6
Is lighter than a concrete segment. Therefore, by pushing in through the propulsion jack 21, the steel pipe 6 can be smoothly propelled and moved in the lining inner cross section 30 toward the arrow A direction until the steel pipe 6 reaches a considerably extended length.

Therefore, again, the steel ring 61 is welded and assembled in the working yard 27 in a ring shape, and the steel ring 61 is transferred to the steel pipe erector 12 in the vertical shaft 20.
A new steel ring 61 is welded to the base end 6a of the steel pipe 6 already formed via the welding device 15 of No. 2, and the length of the steel pipe 6 is increased by an amount corresponding to the length L4 of the steel ring 61. By extending and pushing the extended steel pipe 6 toward the lining inner cross section 30 via the propulsion jack 21, the steel pipe 6 is extended by the length L4 of the steel ring 61 by the lining inner cross section 3
By repeating the operation of sequentially propelling the inside of 0, the steel pipe 6 can be built and arranged on the inner side of the lining 3 by the joining propulsion length of the steel ring 61. At this time, the steel pipe 6
All of the extension and the propulsion work thereof are performed in the vertical shaft 20 through the steel pipe erector 12 and the like, and the steel ring connecting work within the lining inner cross section 30 is excluded. That is, according to the present invention, the steel pipe 6 such as the steel ring 31 is provided in the inner surface 30 of the lining.
The work space for the construction of the steel pipe 6 is limited, that is, the work of transporting the constituent members of, or erection thereof, and further performing the welding work within the inner section 30 of the lining to connect them. The vertical shaft 20 that avoids the necessity of performing it in the lining inner cross section 30 and provides a sufficient working space.
And using the work yard 27 near the shaft 20,
Efficient and reliable formation and building work of the steel pipe 6,
The tunnel 1 can be constructed well.

When the construction of the tunnel 1 is completed in this way, as shown in FIG. 3, in the tunnel 1, the ground 2 arranged on the arrow F direction side, which is the outside of the lining 3 in the tunnel cross-section direction.
However, the earth load, that is, the external pressure, in the form of pushing out into the region that has become a hollow portion due to the formation of the excavation tunnel 2s,
It acts on the lining 3 from the arrow F direction side toward the E direction side.
With respect to the soil load, the lining 3 is formed so as to resist the compressive strength of the segment 31 forming the lining 3 in a shape having a winding thickness L3 in the arrow E and F directions which are tunnel cross-sectional directions. , Its destruction is prevented. The earth load is distributed along the outer peripheral surface 3c of the lining 3 in which a plurality of segments 31 are connected and integrated via the fastening bolts 5 and the like,
Since the lining 3 is shaped so as to be supported by the entire circumference of the lining 3, a part of the lining 3 is prevented from being locally deformed by a soil load. Further, the pore water in the ground 2 is stopped by a water blocking material (not shown) provided in the lining 3, and the pore water penetrates into the inner side of the lining 3 and Leakage is prevented from occurring.

When heavy rainfall occurs in the area corresponding to the tunnel 1 and the amount of precipitation becomes larger than the capacity that can be treated through the rainwater canal other than the tunnel 1, the rainwater intake of the tunnel 1 When the mouth is opened, the tunnel 1 has a structure in which the rainwater or the like from other rainwater channels other than the tunnel 1 can flow into the tunnel space 9 with a water head difference through the rainwater intake port. Rainwater, etc. that had been distributed in the rainwater canal up to that point from the place where it was constructed and arranged in a region deeper than the waterway, etc., into the tunnel space 9 of the tunnel 1 via the rainwater intake port in the open state, It flows in in a form of being press-fitted with a water head difference, and is transported and processed in a form of being drained to the downstream side (not shown) using the tunnel space 9 as a flow path. As a result, in the rainwater canal other than the tunnel 1 in the area shallower than the tunnel 1 in the ground 2, the circulation amount of rainwater or the like is reduced, and the rainwater or the like overflows from the rainwater canal to the ground. Floods will be prevented. By the way, when water is passed through the tunnel space 9, an internal pressure corresponding to the head difference is applied to the steel pipe 6 from the direction of the arrow E to the direction F.
It acts in such a way as to face the direction side. Then, the steel pipe 6
Supports the internal pressure acting in the direction from the arrow E direction side toward the F direction side in a form of receiving the internal pressure planarly via the inner peripheral surface of the steel pipe 6. That is, the arrows E and F, which are the direction of the tunnel cross section,
By the generation of the internal pressure acting in the direction, the steel pipe 6 generates an internal force in a direction in which the steel pipe 6 expands and is pulled in the directions C, D which are the circumferential direction of the tunnel, and the steel pipe 6 generates the internal force. The steel pipe 6 has a tensile strength along the direction of the arrows C and D, which is the circumferential direction of the tunnel, and the steel pipe 6 is prevented from breaking. And
Since the steel pipe 6 is integrated by securely welding the steel rings 61 constituting the steel pipe 6 to each other by the welding robot 16 of the welding device 15, the steel rings are integrated. 61 There is no risk of the joint between the parts breaking due to internal pressure. Further, if the gap 10 is filled with a suitable cushioning material that can serve as an elastic member, when the steel pipe 6 expands in its elastic deformation region, the steel pipe 6 is on the outside in the tunnel cross-sectional direction, that is, in the direction of the arrow F. The cushioning material 7 disposed in the above allows the cushioning material 7 to absorb and absorb it elastically with the deformability possessed by the cushioning material 7, thereby buffering the internal pressure from acting on the lining 3 side. The reliability of the tunnel 1 is further improved. Thus, in the tunnel 1, the internal pressure generated when the tunnel space 9 is used as a groundwater channel is supported exclusively by the steel pipe 6 without propagating to the lining 3 side, and the rainwater is appropriately drained to prevent flooding. It can be used for a long time as a tunnel structure that can be used.

In the embodiment described above, the steel ring 61 is formed by assembling the steel plates into a ring shape in the working yard 27, and then the steel ring 61 is lowered into the vertical shaft 20 through the suspending means 29 to make the steel pipe erector 12 However, the steel ring 61 may be formed by assembling the steel plate from the beginning in the vertical shaft 20 by the steel pipe erector 12 or the like. In addition, in the embodiment, in order to join the already formed steel pipe 6 and the steel ring 61 newly added to the tail end 6a thereof, the welding robot 16 of the welding device 15 passes through the welding device 15. Outer peripheral surface 6c
Although the example of joining by welding from the side has been described, the joining between the adjacent steel rings 61, 61 is not necessarily the outer circumference 6 thereof.
It does not have to be from the c side, for example, in the form of arranging the welding means in the portion which becomes the tunnel space 9 after the inside of the steel pipe 6,
There is no problem if the two members 6 and 61 are welded and joined from the inner peripheral surface side, and further, they may be joined by a joining means other than welding. Furthermore, in the shaft 20,
As the steel pipe erector 12, some kind of steel ring joining means such as a welding device 15 for joining the steel ring 61 to the steel pipe 6, and any propulsion jack 21 for pushing the steel pipe 6 into the lining inner cross section 30. It suffices if the steel ring pushing means is provided, and the detailed configuration thereof is arbitrary.
Further, in the above-described embodiment, the fastening bolt 5 for connecting the adjacent segments 31, 31 is used,
The guide roller 11 is provided on the inner surface 30 of the lining as a steel pipe guide member.
, A plurality of which are rotatably arranged with respect to the invert 3b, and when the steel pipe 6 is pushed in by the propulsion jack 21, the steel pipe 6 is smoothly fed by the rotation operation of the guide roller 11. As described above, the configuration of the guide roller 11 and the method of installing the guide roller 11 on the inner surface 30 of the lining may be other than those described in the embodiments. Further, in order to build the steel pipe 6 in the lining inner cross section 30 which is the inner space of the lining 3 in the tunnel 1, it is not always necessary to use the steel pipe guiding member such as the guide roller 11.

[0024]

As described above, according to the present invention, the vertical shaft 20 is formed so as to communicate with the inner space such as the inner cross section 30 of the lining of the tunnel lining such as the lining 3 that can support the earth pressure by the ground 2. Steel ring joining means such as welding device 15 and propulsion jack 2
A steel ring pushing means such as 1 is provided, and the shaft 2
Steel ring 61 formed to a predetermined length L4 in 0
Is joined by the steel ring joining means to the rear end of the base end 6a or the like of the steel ring joined body such as the steel pipe 6 in a state of being pressed during the tunnel lining, and the steel ring is newly joined. Since the steel ring joined body is pushed toward the inner space of the tunnel lining by the steel ring pushing means, the steel ring joined body in which the steel ring is newly joined is built during the tunnel lining. The steel ring joined body is extended in the shaft 20 by joining a new steel ring to the tail end thereof through the steel ring joining means, and is extended to the inner space of the tunnel lining through the steel ring pushing means. By being pushed in, it can be sequentially propelled in the inner space of the tunnel lining. Therefore, if the present invention is used when constructing a tunnel such as the tunnel 1 as an underground river, when the steel pipe for supporting the internal pressure is built inside the lining for supporting the earth pressure by the ground, the vertical shaft 20 Inside, a new steel ring is joined to the tail end of the steel ring joined body through the steel ring joining means, and the steel ring joined body to which the steel ring is newly joined is inside the tunnel lining by the steel ring pushing means. By repeating the operation of pushing toward the space a required number of times corresponding to the extension length of the steel ring joint to be built in the inner space of the tunnel lining, steel pipe construction work such as welding of steel plates in the tunnel cross section can be performed. Without needing anything
It is possible to properly install and install a predetermined length of steel ring joint, that is, a steel pipe, in the inner space of the tunnel lining. In this way, when a steel pipe such as the steel pipe 6 is built in a tunnel such as the tunnel 1, all the work of constructing the steel pipe in the tunnel cross section is eliminated. For example, when welding is carried out while installing ventilation or ventilation equipment in the tunnel cross section in a state where the working space in the tunnel cross section is narrowed by installing some device or equipment in the tunnel cross section for welding. There is no need to perform the steel plate joining work. That is, all of the work required for building the steel pipe in the tunnel is efficient and reliable in the sufficient work space, the functional device installed therein, the vertical shaft 20 where the equipment can be secured, and the vicinity thereof. Can be done. Therefore, the work space required for erection of the steel pipe is not required in the tunnel cross section, and the tunnel construction work other than the steel pipe erection is smoothly performed by widely using the tunnel cross section corresponding to this. By advancing to step 2, it is possible to build a steel pipe on the inner side of the segment lining for supporting the earth pressure with a good workability for supporting the internal pressure that may be generated by the flow of rainwater.

In addition to the above-mentioned effects, the lining 3
In the inner space of the inner lining 30 of the tunnel lining, etc.,
A plurality of steel ring guide members such as guide rollers 11 are arranged side by side in the axial direction of the tunnel so as to be rotatable with respect to the invert portion such as the invert 3b of the tunnel lining. When the steel ring joined body such as the steel pipe 6 is pushed by the pushing means, the steel ring joined body is fed toward the inner space of the tunnel lining through the rotating operation of the steel ring guide member. The steel ring joined body fed into the inner space of the lining through the rotating operation of the steel ring guide member can be propelled in the inner space of the tunnel lining without contacting the invert portion of the tunnel lining. . Therefore,
During the propulsion operation of the steel ring joined body, the propulsion operation is hindered by the frictional resistance of the invert portion, or the steel ring joined body and the inner peripheral surface of the tunnel lining come into contact with each other and slide. In the form, they are more smoothly pushed through the steel ring pushing means in the inner space of the tunnel lining, i.e. in the tunnel cross section, without the risk of them being damaged by each other. Can be built. Therefore, the steel pipe is relatively easily pushed into the tunnel cross section by the steel ring pushing means because it is lighter in weight than the tunnel lining by the segment. By utilizing the rotation operation of the above, it can be efficiently installed in the tunnel cross section with a smaller pushing force. In tunnels such as tunnels 1 for underground rivers, in order to install the steel ring guide member in the inner space of the tunnel lining, among the fastening bolts between segment rings that are adjacent in the tunnel axial direction, As long as it is attached to what is placed in the invert part, it can be installed easily and in an appropriate position, and if the steel ring guide member is simply rotatable with respect to the invert part. Well, since it does not need to be driven, it is relatively inexpensive to bury the steel ring guide member in the steel ring joint body, that is, the gap 10 between the steel pipe and the invert. Therefore, when building a steel pipe in a tunnel,
Economical construction can be performed in a manner that the pushing capacity of the steel ring pushing means is saved by the feeding ability of the steel ring joined body by the steel ring guide member.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view showing an example of a tunnel being constructed using a method for building a steel pipe in a tunnel according to the present invention.

FIG. 2 is a sectional view taken along the line II and II in FIG.

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

FIG. 4 is a diagram showing a construction procedure of the tunnel shown in FIG.

[Explanation of symbols]

 2 …… Ground 3 …… Tunnel lining (lining) 30 …… Inner space (inner section of lining) 3b …… Invert part (invert) 6 …… Steel ring joint (steel pipe) 6 …… End (base) End) 61 ... Steel ring 11 ... Steel ring guide member (guide roller) 15 ... Steel ring joining means (welding device) 21 ... Steel ring pushing means (propulsion jack)

Claims (2)

[Claims] 1. A steel ring joining means and a steel ring pushing means are provided in a vertical shaft which communicates with an inner space of a tunnel lining capable of supporting earth pressure due to the ground, and are formed to have a predetermined length in the vertical shaft. Steel ring,
The steel ring joined body joined by the steel ring joining means to the tail end of the steel ring joined body in a state of being pushed in during the tunnel lining, and the steel ring joined body having the steel ring newly joined is the steel ring pushing means. A method for erection of a steel pipe in a tunnel, which is configured so that the steel ring joined body in which the steel ring is newly joined is erected during the lining by pushing into the inner space of the lining by. 2. In the inner space of the tunnel lining, a plurality of steel ring guide members are arranged side by side in the tunnel axial direction so as to be rotatable with respect to the invert portion of the tunnel lining. The structure for feeding the steel ring joined body toward the inner space of the tunnel lining through the rotational movement of the steel ring guide member during the pushing operation of the steel ring joined body by the ring pushing means. 1. A method for building a steel pipe in a tunnel according to 1.