JP7265465B2 - Propulsion method and propulsion device for curved pipe - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion method and a propulsion device for a curved pipe.

Conventionally, a small-diameter curved boring method and a large-diameter curved pipe roof method using curved pipes, called the "NEW TULIP method," are known.
These are used for burying curved pipes, burying sheath pipes such as cables, underground joints of shield tunnels, underground widening of vertical shafts, shoring of large cross-section tunnels, pre-receiving work, widening between tunnels, etc. ing.

In the drilling method using this kind of curved pipe, it is extremely important to control the reaching position of the curved pipe.
For this reason, it is important to manage matters such as the setting of the boring start point and the end point, the curved pipe and its connection mode, and the precision of the propulsion device for the curved pipe.

However, as far as the present inventors know, unlike the linear jacking method and the underground shield method, in the case of curved pipe jacking, once the jacking is started, there is a means for controlling the reaching position of the curved pipe. At present, there is no such method.

Japanese Patent No. 4606226

SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to control the direction in which the tip of a curved tube advances and the position to which it reaches during the course of propulsion of the curved tube.

The inventors, as shown in FIG.
(1) When the rear part of the curved tube 10 is rotated clockwise R and propelled, the tip of the curved tube 10 is shifted to the left and propelled.
(2) When the rear portion of the curved tube 10 is rotated counterclockwise L and propelled, the tip of the curved tube 10 is shifted to the right and propelled.
I found out.
During the propulsion process, the arrival position of the curved tube can be controlled by performing control operations based on the above principle.

< First Aspect>
In the method of grasping a curved pipe and propelling the curved pipe along the curve in the ground,
In controlling the course of the curved tube,
Simultaneously operating means for rotating the curved tube in the circumferential direction and means for propelling the curved tube to rotate and propel the curved tube in the circumferential direction;
A jacking method for a curved pipe characterized by:

< Second Aspect>
In a propulsion device used in a method of gripping a curved pipe and propelling the curved pipe in the ground along a curve,
an installation platform;
a base held by the installation base and provided corresponding to the curved tube;
a first chucking means for chucking the curved tube provided with respect to the base;
At a position different from the chucking position of the curved tube by the first chucking means, the curved tube is moved around the curved tube with the installation base as a reaction force seat together with the second chucking means that chucks the curved tube. a rotating means for rotating in a direction;
a propulsion jack for propelling the base in a propulsion direction using the installation base as a reaction seat;
A curved tube propulsion device comprising:

< Third Aspect>
In a propulsion device used in a method of gripping a curved pipe and propelling the curved pipe in the ground along a curve,
an installation platform;
a movable stand provided corresponding to the curved tube;
Chuck means for chucking the curved tube provided on the movable table;
Rotating means for rotating the curved tube in its circumferential direction with the chuck means for chucking the curved tube, using the movable base as a reaction force seat for the curved tube;
a propulsion jack for propelling the movable base in a propulsion direction using the installation base as a reaction force seat;
A curved tube propulsion device comprising:

According to the present invention, it is possible to control the direction in which the tip of the curved tube advances and the position it reaches in the process of propelling the curved tube.

FIG. 2 is an explanatory diagram of basic knowledge according to the present invention; It is explanatory drawing of the example of a curve boring construction method. It is a principal part side view of the propulsion apparatus of a 1st example. It is a cross-sectional view of the first gripping device. It is a cross-sectional view of the gripping and rotating device. It is a principal part side view of the propulsion apparatus of a 2nd example. It is a cross-sectional view thereof. FIG. 4 is a schematic vertical cross-sectional view of an example in which an exemplary excavation tip device is installed in a curved pipe;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described with reference to examples of embodiments.

An example of the curved boring method is, for example, as shown in FIG. are repeated to install a plurality of tunnels to connect the existing tunnels 1 and 2. In this example the curved tube 10 is propelled upwards, but it could also be propelled downwards.
Further, as described above, the present invention can be applied not only to the large-diameter curved pipe roof construction method but also to the small-diameter curved pipe boring construction method.

FIG. 1 is an explanatory diagram of the basic findings related to the present invention, and the propelling direction is an example from the bottom to the top of FIG. 1 (indicated by the white arrow). As described above, control is performed based on the following principle.
(1) When the curved tube 10 is rotated clockwise and propelled, the tip of the curved tube 10 is shifted leftward and propelled.
(2) When the curved tube 10 is rotated counterclockwise L and propelled, the tip of the curved tube 10 is shifted to the right and propelled.
Directional control is mainly in the horizontal direction, but vertical control is also possible depending on ground conditions.
The grip position of the curved tube can be set depending on the conditions, and in addition to being able to grip and rotate at the intermediate portion, in the case of the following example, it may be the rear portion of the curved tube due to restrictions on the installation conditions of the device.

<First example>
A propulsion device 30X according to a first example for implementing this is shown in FIGS.
A propulsion device 30X is installed in an underground space (for example, in a tunnel).
The propulsion device 30X is provided at, for example, the rear portion of the curved pipe 10 (provided at the intermediate portion of the curved pipe 10 during initial excavation),
An installation frame 31 provided, for example, in the tunnel 1 with respect to the ground,
It has a propulsion part P, a front rotation part Q, and a rear connection holder part R, which are provided on the installation frame 31 .

The installation platform 31 may be fixed in position, but in the illustrated example, the installation platform 31 is configured such that the installation angle of the installation platform 31 can be adjusted by the cylinder 31C with respect to the main platform 31A about the rotation axis 31a. ing. After the installation angle is adjusted, the tilt angle of the tilt base 31B with respect to the installation base 31 is fixed by the fixing bolts 31D.

An example of the propulsion unit P is shown in FIG. The chuck case 33 has a chuck 35 that presses against the outer peripheral surface of the curved tube 10, and hydraulically uses the chuck case 33 as a back seat to chuck the outer peripheral surface of the curved tube 10 with the chuck 35. Configure.
An opening/closing cylinder 36 is pivotally supported on the side of the base 32 , and its tip is connected to the chuck case 33 . The expansion and contraction of the open/close cylinder 36 causes the chuck case 33 and the chuck 35 to contact and separate from the outer peripheral surface of the curved tube 10 .
A centering cylinder 37 receives the curved tube 10 and centers it.
Holding bodies 32A are integrated on both sides of the base body 32, and guide wheels 39 pivotally supported by the holding bodies 32A are flanges 38a of guide rails 38 as guide bodies having an H-shaped cross section, for example. is straddling the

On the other hand, as shown in FIG. 3, the tilt base 31B is provided with a reaction seat 41, and a thrust jack 40 is connected between the reaction seat 41 and the propulsion part P, for example, the base body 32. ing.
In the propulsion device 30X, when the propulsion jacks 40 are extended while both sides of the outer peripheral surface of the curved tube 10 are chucked by the chucks 35, 35, the curved tube 10 is propelled forward and upward or downward. .
At this time, the propulsion part P is propelled and moved along the curve of the flange 38a of the guide rail 38 while the guide wheel 39 constituting the guide body is straddled over the flange 38a of the guide rail 38 .
In such a process of propulsive movement, if the arrival position of the curved tube 10 is expected to deviate from the target, the rotating part Q is operated.

An example of the rotating part Q is shown in FIG. To explain this, a pedestal 31C having an arcuate upper surface is integrated with the installation pedestal 31, which in the illustrated example is a tilting table 31B, and the lower surface corresponds to the arcuate surface of the pedestal 31C. A support 52 having an arcuate surface is arranged.
Chuck means 51 , 51 facing both side surfaces of the curved tube 10 are integrated with the support 52 .
The chuck means 51 includes a case 51b, a chuck 51a provided in the case 51b, and a pressing portion 51c that pushes the chuck 51a toward the curved tube 10 and performs a chucking operation.
On the other hand, in the installation base 31, a support base 31E integrated with the tilting base 31B in the illustrated example is provided with a telescopic jack 54 via a support shaft 54a, and the other end is fixed to a support 52. It is connected with the bracket 52a.
As the expansion jack 54 expands and contracts, the support 52 and the chuck means 51, 51 rotate about the axis of the curved tube 10 by a predetermined angle.

Within the curved tube 10, any suitable or known tipping device is provided. An example form is shown in FIG.
That is, the tip device 70 is provided coaxially within the curved tube 10 . In the drawing, the members and equipment are shown linearly. Moreover, it is a schematic diagram showing only the main part and not showing the details.
The tip device 70 has a cutter head 71 at its tip and protrudes a little from the tip of the curved tube 10 . A hydraulic motor 73 rotates the cutter head 71 and cone rotor 72 to feed drilling mud through a conduit 74 . It is designed to be taken in backwards.
Further, the chucking device 75 has a function of fixing equipment in front thereof by pressing from the inner surface of the curved tube 10 .
Reference numeral 76 denotes an in-machine control panel with a built-in gyro; 77, a rolling meter; and 78, a pitching meter.

The above first example operates as follows.
When it becomes necessary to correct the propelling direction of the curved tube 10 based on, for example, a signal from the gyro 76, the rear portion of the curved tube 10 is chucked by the chucking means 51, 51 of the rotating portion Q, and the telescopic jack is operated. By adjusting the expansion/contraction amount of 54, the curved tube 10 is rotated by a predetermined angle in the circumferential direction.
The relationship between the rotating direction and the propulsion direction of the curved tube 10 is as described above.
As a sequence, it is desirable to set the rotation angle of the curved tube 10 in the circumferential direction and then propel the curved tube 10 by the propelling jacks 40 , 40 .
Along with this propulsion, excavation is performed by the tip device 70 to move the curved pipe 10 forward.
When the advance of a predetermined length is completed, the following unit curved tube is brought in, connected to the existing curved tube 10, and the curved tube 10 is advanced by the same operation. To connect the existing curved tube 10 and the unit curved tube, the chuck of the propulsion part P of the existing curved tube 10 and the chuck of the connecting holder part R of the subsequent unit curved tube are used.
Although the details of the connecting holder portion R are not shown, it has a structure for chucking the subsequent unit curved pipe in a double-door manner.

<Second example>
In a first example, the curved tube 10 is rotated and then propelled. Further, the propulsion section P and the rotation section Q are separate bodies.
In addition to this first example, a second example is proposed in which the curved tube 10 is propelled while being rotated.
An example of the configuration of a propulsion device in which the propulsion section P and the rotation section Q are integrated for carrying out the second example is shown in FIGS. 6 and 7. FIG. It should be noted that this illustrated example is also a conceptual diagram.

That is, in the propulsion device 30Y according to the second example,
An installation base 31, which is a tilting base 31B in the illustrated example,
a movable table 62 provided, for example, at the rear of the curved tube 10;
Chuck means 66 (for example, similar to the chuck in FIG. 4) for chucking the rear portion of the curved tube 10 provided for the movable table 62;
Together with the chucking means 66 that chucks the rear portion of the curved tube 10, the curved tube 10 is rotated in its circumferential direction using the movable table 62 as a reaction force seat, for example, a rotation consisting of a telescopic jack similar to the example of FIG. means 65;
a propelling jack 63 that propels the movable platform 62 in the propelling direction using the installation platform 31, or the tilting platform 31B in the illustrated example, as a reaction seat;
including.

In the illustrated example, the movable base 62 is engaged with, for example, the tilting base 31B, and is moved by the driving jacks 63, 63 along a predetermined curvature.
A rotating platform 64 is held on the movable platform 62 via, for example, a pair of telescopic jacks 65 , 65 .
As described above, the rotary base 64 is provided with chuck means 66, 66 similar to the first example, for chucking the curved tube 10. As shown in FIG.
In this second example, when it becomes necessary to correct the propelling direction of the curved tube 10 based on, for example, a signal from the gyro, the rear portion of the curved tube 10 is chucked by the chuck means 66, 66, and The expansion and contraction amounts of the expansion and contraction jacks 65, 65 are adjusted to rotate the curved tube 10 in the circumferential direction.
The relationship between the rotating direction and the propulsion direction of the curved tube 10 is as described above.
If necessary, only one telescopic jack 65 may be used as in the example of FIG.

The curved tube 10 is propelled by the propulsion jacks 63, 63 while rotating the curved tube 10 in the circumferential direction.
Along with this propulsion, boring is performed by the tip device 70 to move the curved tube 10 forward.
In the second example in which the curved tube 10 is propelled by the propulsion jacks 63, 63 while rotating the curved tube 10 in the circumferential direction, the rotation and propulsion can be performed simultaneously or in small time or distance units, so the curve Correction of the propulsion direction of the tube 10 (tip) can be accurately performed.

In the above example, the propulsion part P, the front rotation part Q, and the rear connection holder part R are provided, but they are not essential elements in the present invention.
The positional relationship of the propulsion part P, the rotation part Q, and the connection holder part R in the front-rear direction can be changed as appropriate.
For example, in addition to attempting to rotate at the foremost position, it may be possible to attempt to rotate at the intermediate position and at the rearmost position.
From the same point of view, in addition to promoting in the middle, in addition to promoting in the forefront, it is also possible to promote in the rear.
Furthermore, each of the propelling portion P, the rotating portion Q, and the connecting holder portion R may be provided in plurality.

The present invention can be applied not only to the "NEW TULIP construction method" but also to propulsion of curved pipes in general. In addition, although the diameter of the curved pipe is not limited, it can be suitably applied to a boring method for narrow curves (for example, 500 mm or less).

3, 30X, 30Y... Propulsion device, 10... Curved tube, 31... Installation stand, 31B... Tilting table, 32... Substrate, 33... Chuck means, 40... Propulsion jack, 51... Chuck means, 54... Telescopic jack (rotating means ), 63... Propulsion jack, 70... Tip device, P... Propulsion part, Q... Rotating part, R... Connection holder part.

Claims (3)

In the method of grasping a curved pipe and propelling the curved pipe along the curve in the ground,
In controlling the course of the curved tube,
Simultaneously operating means for rotating the curved tube in the circumferential direction and means for propelling the curved tube to rotate and propel the curved tube in the circumferential direction;
A jacking method for a curved pipe characterized by: In a propulsion device used in a method of gripping a curved pipe and propelling the curved pipe in the ground along a curve,
an installation platform;
a base held by the installation base and provided corresponding to the curved tube;
a first chucking means for chucking the curved tube provided with respect to the base;
At a position different from the chucking position of the curved tube by the first chucking means, the curved tube is moved around the curved tube with the installation base as a reaction force seat together with the second chucking means that chucks the curved tube. a rotating means for rotating in a direction;
a propulsion jack for propelling the base in a propulsion direction using the installation base as a reaction seat;
A curved tube propulsion device comprising: In a propulsion device used in a method of gripping a curved pipe and propelling the curved pipe in the ground along a curve,
an installation platform;
a movable stand provided corresponding to the curved tube;
Chuck means for chucking the curved tube provided on the movable table;
Rotating means for rotating the curved tube in its circumferential direction with the chuck means for chucking the curved tube, using the movable base as a reaction force seat for the curved tube;
a propulsion jack for propelling the movable base in a propulsion direction using the installation base as a reaction force seat;
A curved tube propulsion device comprising:

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