JP2976106B1 - Installation method of lining plate in open shield method - Google Patents

Abstract

Abstract: [PROBLEMS] In a process of digging by an open shield method using an open shield machine, when a lining plate is laid on an excavated portion of a road, the lining plate and the road are separated by a water gradient of the road or the own weight of the open shield machine. Even if a step occurs at the boundary of the open shield machine, it can be quickly eliminated and a flat road surface can be formed in a short time, and the top surface of the open shield machine can be opened in a short time even when resuming digging. SOLUTION: A propulsion jack 2 is provided inside left and right side wall plates 1a.
And a lining plate 11 provided with a side plate 12 for height adjustment with respect to a road surface to be freely attached to the open shield machine 1.
And a road surface material 14 for height adjustment such as asphalt is laid on the upper surface of the lining plate 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for installing a lining plate in an open shield method for constructing an underground structure such as water supply and sewerage and an underpass in an urban area.

[0002]

2. Description of the Related Art The open shield method is an efficient method utilizing the advantages of the open cutting method (open cut method) and the shield method, and the open shield machine 1 used in the open shield method is schematically shown in FIGS. As shown in FIG. 8, the front, rear and upper surfaces of left and right side walls 1a and a bottom plate 1b connected to these side walls 1a are opened, and the front end of the side wall 1a of the front part 1d and the tip of the bottom plate 1b are cut off. 1c, and the propulsion jacks 2 are arranged vertically rearward near the center or near the rear end of the side wall plate 1a which is the jack portion 1e. In the figure, 3 indicates a partition, and 1f indicates a tail.

[0003] An open shield method using the open shield machine 1 is not shown in the drawings, but the open shield machine 1 is installed in a starting pit, and the propulsion jack 2 of the shield machine 1 is extended to start. The shield machine 1 was advanced by applying a reaction force to the reaction wall in the mine, and the first concrete box 4 forming the underground structure was suspended from above and shrunk in the tail portion 1f of the shield machine 1. Set behind the propulsion jack 2. A strut is provided between the propulsion jack 2 and the reaction force wall to adjust the distance as appropriate.

[0004] The starting pit is constituted by a retaining wall such as a sheet pile, and the retaining wall is partially mirror-cut to start the open shield machine 1. The ground improvement may be given to the part.

An excavator 9 such as a shovel excavates earth and sand from the front or upper surface of the open shield machine 1 and discharges the earth. Simultaneously with or after this earth removal step, the propulsion jack 2 is extended to move the open shield machine 1 forward. In the case of this advancing process, a pressing angle 8 composed of a frame using a box steel material or a mold steel is disposed in front of the concrete box 4.

[0006] The first concrete box 4
The second concrete box 4 is hung in the tail part 1f of the shield machine 1 before (1). Hereinafter, the same earth removal process, advance process, and setting process of the concrete box 4 are appropriately repeated, and the concrete box 4 is sequentially left in the ground as the open shield machine 1 advances, and the concrete box 4 is further removed. Put backfill soil 5 on the upper surface of 4.

The concrete box 4 is connected to the shielding machine 1
When suspended in the tail portion 1f, a height adjusting member 7 made of a concrete block or the like is disposed below the concrete box 4, and inside the tail portion 1c, a gap is formed in the left, right, and lower spaces of the concrete box 4. The grout material 6 is filled.

In this way, when the open shield machine 1 reaches the destination pit, it is removed and the construction is completed.

In such an open shield method, the concrete box 4 is connected to the open shield machine 1 as described above.
Left in the ground in tandem with the advance of
Is suspended in the tail part 1f of the shield machine 1 and leaves the tail part 1f and remains in the ground as the open shield machine 1 advances.

The concrete box 4 is made of reinforced concrete and comprises a left side plate 4a, a right side plate 4b, an upper floor plate 4c and a lower floor plate 4d as shown in FIG. I have.

By the way, the burying of the concrete box 4 by such an open shield method is often carried out under a road in an urban area, and the road is closed during the construction, but the road is closed for a certain period of day. It is obligatory to open the door to make it passable. For this reason, excavation is appropriately stopped before the open shield machine 1 reaches from the starting pit to the arrival pit, and a lining plate is laid on the upper opening of the open shield machine 1, that is, the cut-out portion of the road to open the pit. Is temporarily closed, and the car runs on this lining plate,
It also allows people to walk.

[0012]

Problems to be Solved by the Invention Open Shield Machine 1
When a lining board is installed on the upper part of the road, there is a water gradient on the road, and the open shield machine 1 sinks by its own weight,
A step occurs at the boundary between the lining plate and the road, and this step hinders smooth running and walking of the car. Also,
If this step is large, for example, it will reach about 20 cm,
In order to eliminate this, the installation angle of the lining plate is adjusted, but such adjustment work requires time and effort, and it is difficult to open the road by the predetermined time, which will hinder traffic. There is also.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art. Even if there is a step at the boundary between the lining plate and the road due to the weight of the shield machine,
This can be solved quickly and a flat road surface can be formed in a short time,
Another object of the present invention is to provide a method for installing a lining plate in an open shield method that allows the upper surface of an open shield machine to be opened in a short time even when resuming excavation.

[0014]

In order to achieve the above object, the present invention firstly arranges a propulsion jack inside the left and right side wall plates and opens the front, rear and upper surfaces of an open shield machine. Excavating and discharging earth and sand in front of the upper surface opening, extending the propulsion jack and moving the shield machine forward with a concrete box as a reaction force, and a new process behind the propelled jack shrunk in the tail part of the shield machine In the open shield method, where the concrete box is suspended from above and set by hanging down from above, the concrete box is sequentially buried in tandem.In the open shield method, after a predetermined length of excavation, advance is stopped, and side plates for height adjustment are attached. Lay the lining plate provided freely at the top opening of the open shield machine, select the mounting position for the side plate for height adjustment, match the upper end with the road surface, and place it on the lining plate Laying a road surface material for height adjustment such as asphalt and matching the upper surface of the road surface material with the road surface, after a lapse of a predetermined time, removing the road surface material and the lining plate and restarting the excavation of the open shield machine The gist is that.

Second, a propulsion jack is disposed inside the left and right side wall plates, and a step of excavating and discharging earth and sand in front of the front or top opening of the open shield machine having the front, rear and top surfaces opened; The process of extending the shield machine by making the concrete box a reaction force by extending the concrete box, and the step of hanging and setting a new concrete box from the top behind the propelled jack shrunk in the tail part of the shield machine as appropriate In the open shield method, in which concrete boxes are repeatedly buried one after another in a row, a lining plate with side plates for height adjustment slidable up and down is fixed to the top opening of the jack arrangement part of the open shield machine. After a predetermined length of excavation, stop moving forward and open the lining plate with the side plates for height adjustment at the mounting position freely. On the road surface material for height adjustment, such as asphalt, on the lining board. The point is to remove the road surface material and the lining plate laid on the upper opening of the front part and the tail part of the open shield machine and resume the excavation of the open shield machine after a lapse of a predetermined time. Is what you do.

According to the first aspect of the present invention, since the side plate for adjusting the height is attached to the lining plate laid on the upper surface opening of the open shield machine, the lining plate is laid and the height of the side plate is adjusted. The height is adjusted to be the same as the road surface, and this side plate is used as a formwork to lay a road surface material for height adjustment such as asphalt on the lining plate,
The laying plate can be laid at the same height as the road surface. Further, it is easy to open the upper surface opening of the open shield machine again because the road surface material and the lining plate may be removed.

The use of a fluid or granular material such as asphalt or sand as a road surface material for height adjustment facilitates not only height adjustment but also accuracy.

According to the second aspect of the present invention, in addition to the operation of the second aspect of the present invention, there is no problem in the construction even if the upper opening of the open shield machine is closed or excavated. By always fixing the lining plate for the jack portion which is not used, it is possible to lay the lining plate at the time of opening the road and to eliminate the trouble of removing the lining plate, thereby improving workability.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a vertical sectional side view showing a first embodiment of the open shield method according to the present invention, and FIG. 2 is a vertical sectional front view of a main part of the open shield method. As shown in FIG. Side wall plate 1a
Since the propulsion jack 2 is disposed inside and the front, rear and top surfaces are opened, detailed description thereof will be omitted.

In the drawing, reference numeral 11 denotes a lining plate used in the method of installing a lining plate in the open shield method according to the present invention, and a side plate 12 for height adjustment with a road surface is attached to a side portion of the lining plate 11. It was provided freely. As shown in FIG. 3, the side plate 12 is provided with a number of bolt holes 12a for height adjustment as appropriate in the vertical direction, and is fixed to the side of the lining plate 11 with bolts 13. When the lining plate 11 is installed, the side plate 12 is also attached to the front and rear portions of the front portion 1d and the rear portion of the tail portion 1f.

In FIG. 1, reference numeral 14 denotes a road surface material for adjusting the height laid on the upper surface of the lining plate 11. The material is a fluid such as asphalt, or a granular material such as sand or crushed stone. In the case of asphalt, asphalt, stone powder, fine aggregate and coarse aggregate are mixed by heating, and are poured at 180 to 240 ° C.

A method of using the lining plate 11 and the road surface material 14 to temporarily close the upper opening of the open shield machine 1 and open the road will be described. Excavate under the road 15 with the open shield machine 1 and, when a predetermined time has passed, install the lining plate 11 at all the upper surface openings of the front portion 1d, the jack portion 1e, and the tail portion 1f of the open shield machine 1. . The lining plate 11 is held on the upper part of the open shield machine 1 by the side wall plate 1a and the support metal 16 which is an angle material attached to the inside of the side wall plate 1a.

Next, the mounting position of the side plate 12 mounted on the lining plate 11 is selected by selecting the bolt hole 12a, or the side plate 12 is mounted on the lining plate 11 in the upside down direction.
By adjusting the length of the side plate 12 projecting upward from the lining plate 11, the side plate 12
Is located on the same plane as the surface of the road 15. Accordingly, even if the road 15 is inclined due to a water gradient or the like, or the open shield machine 1 sinks by its own weight and a step occurs at the boundary between the lining plate 11 and the road 15, the side plate 12 is the same as the road 15. Surface.

In this state, a road surface material 14 using a fluid such as asphalt, or a granular material such as sand or crushed stone is cast and scattered on the upper surface of the lining plate 11. The laying of this road surface material 14 is easy to work because the side plate 12 functions as a formwork and is made in a range surrounded by the side plate 12, and the height of the laying is up to the upper end of the side plate 12,
Since the fluid or the granules as described above are used for the road surface material 14, the height can be easily adjusted by the action of self-leveling.

Accordingly, if there is a step at the boundary between the lining plate 11 and the road 15, the road surface material 14 is laid slopingly in relation to the lining plate 11. By 14, the step with the road 15 is eliminated, and the road 15 and the lining plate 11 are formed on a flat surface.

The road 15 is opened by closing the upper opening of the open shield machine 1 as described above. After a certain period of time, to close the road 15 and start digging by the open shield machine 1, the road surface material 14 and the lining plate 11 are removed. In this case, when crushed stone, sand, or the like is used as the road surface material 14, as well as the lining plate 11, it can be reused.

In the first embodiment, the front portion 1d, the jack portion 1e, and the tail portion 1 of the open shield machine 1 are used.
All top openings of f are opened at the time of construction, and the lining plate 11 is installed in this opening at the time of opening the road,
In the second embodiment shown in FIGS. 5 to 7, the front part 1 d for excavating from the ground and the tail part 1 f for installing the concrete box 4 from the ground are in an open state during construction, but the jack is not open. Since there is no problem even if the disposed portion is not left open, the lining plate 11 is fixed to this portion in advance.

In FIG. 5, 11a is an open shield machine 1.
Is a lining plate which is always fixed above the portion where the jack is provided, and 11b denotes a lining plate which is installed only when the road is opened. Each of the lining plates 11a and 11b has a height-adjusting side plate 12 attached to a side portion in the same manner as in the first embodiment.

Since the lining plate 11a is always fixed above the portion of the open shield machine 1 where the jack is provided, only the upper surface openings of the front portion 1d and the tail portion 1f are opened when the road is opened. What is necessary is just to install the lining board 11b separately. Also, only this part needs to be removed at the time of removal. Therefore, the time and labor required for opening and closing the lining plate 11b can be reduced as compared with the first embodiment. Road surface material 14
Is laid on both lining plates 11a and 11b.

[0030]

As described above, in the method for installing a lining plate in the open shield method according to the present invention, the lining plate is laid, and the height of the side plate is adjusted to be the same as the road surface. A simple work of laying asphalt or other road surface material such as asphalt on a lining board using the formwork as a formwork. Height can be. Further, it is easy to open the upper surface opening of the open shield machine again because the road surface material and the lining plate may be removed.

The use of a fluid or granular material such as asphalt or sand as a road surface material for height adjustment facilitates not only height adjustment but also accuracy.

Further, the jacking portion of the upper surface opening of the open shield machine, which does not hinder the construction even during the excavation or in the closed state, is always fixed by the lining plate, and this portion is opened to the road. In some cases, the labor of laying and removing the lining plate can be omitted, and the opening and closing time and labor of the lining plate can be further reduced, so that the workability is further improved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing a first embodiment of a method for installing a lining plate in an open shield according to the present invention.

FIG. 2 is a longitudinal sectional front view of a main part showing a first embodiment of a method for installing a lining plate in an open shield according to the present invention.

FIG. 3 is a front view showing a part of a side plate as a main part of a lining plate installation structure in the method of the present invention.

FIG. 4 is a longitudinal sectional front view showing a first embodiment of a method for installing a lining plate in an open shield according to the present invention.

FIG. 5 is a longitudinal sectional side view showing a second embodiment of a method for installing a lining plate in an open shield according to the present invention.

FIG. 6 is a longitudinal sectional front view of a main part showing a second embodiment of a method for installing a lining plate in an open shield according to the present invention.

FIG. 7 is a vertical sectional front view showing a second embodiment of a method for installing a lining plate in an open shield according to the present invention.

FIG. 8 is a vertical sectional side view showing an outline of the open shield method.

FIG. 9 is a perspective view of a concrete box.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Open shield machine 1a ... Side wall plate 1b ... Bottom plate 1c ... Blade part 1d ... Front part 1e ... Jack part 1f ... Tail part 2 ... Propulsion jack 3 ... Partition wall 4 ... Concrete box 4a ... Left wall plate 4b ... Right wall plate 4c: Upper floor plate 4d: Lower floor plate 5: Backfill soil 6: Grout material 7: Height adjusting material 8: Push angle 9: Excavator 10: Opening 11, 11a, 11b ...
Lining plate 12 ... Side plate 12a ... Bolt hole 13 ... Seal material 14 ... Road surface material 15 ... Road 16 ... Support hardware

Claims (2)

(57) [Claims] 1. A step of disposing a propulsion jack inside a left and right side wall plate, excavating and discharging earth and sand in front of a front or top opening of an open shield machine having front, rear and top openings, and extending the propulsion jack. The concrete box as a reaction force to advance the shield machine, and the step of hanging a new concrete box from above and setting it behind the propelled jack shrunk in the tail part of the shield machine as appropriate In the open shield method, in which concrete boxes are sequentially buried in a column, after a predetermined length of excavation, the advancing is stopped, and a lining plate provided with a side plate for height adjustment at the mounting position is laid at the top opening of the open shield machine. , Select the mounting position of the side plate for height adjustment and match the upper end to the road surface,
A road surface material such as asphalt is laid on the lining plate to make the upper surface of the road surface material coincide with the road surface, and after a lapse of a predetermined time, the road surface material and the lining plate are removed to open the shield. A method for installing a lining plate in an open shield method, wherein the excavation of the machine is resumed. 2. A step of disposing a propulsion jack inside the left and right side wall plates, excavating and discharging earth and sand in front of the front or top opening of the open shield machine having front, rear and top openings, and extending the propulsion jack. The concrete box as a reaction force to advance the shield machine, and the step of hanging a new concrete box from above and setting it behind the propelled jack shrunk in the tail part of the shield machine as appropriate In the open shield method, in which concrete boxes are sequentially buried in columns, a lining plate provided with side plates for height adjustment at the mounting position is fixed to the top opening of the jack arrangement part of the open shield machine, and a predetermined length After excavation, stop moving forward and lay a lining plate with side plates for height adjustment slidable up and down at the upper opening of the front and tail of the open shield machine Then, the mounting position of the side plate for height adjustment is selected, the upper end thereof is matched with the road surface, the road surface material for height adjustment such as asphalt is laid on the lining plate, and the upper surface of the road surface material is And after a lapse of a predetermined time, removing the road surface material and the lining plate laid on the upper surface opening of the front part and the tail part of the open shield machine and restarting the excavation of the open shield machine. Installation method of lining plate in shield method.