JP3678110B2 - Large diameter gravel sorting device for tunnel excavator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a large-diameter gravel sorting apparatus for a tunnel excavator that sorts large-diameter gravel contained in earth and sand excavated by a cutter and taken into a chamber of the tunnel excavator from a face.
[0002]
[Prior art]
As a construction method for constructing a tunnel in the ground without excavation, there is a shield construction method in which the underground is excavated by a cylindrical shield excavator. In particular, when constructing a small-diameter tunnel for burying sewer pipes etc. in the ground, a fume pipe and a steel pipe (called a propulsion pipe) are sequentially inserted behind the shield excavator. A semi-shielded construction method is known in which a plurality of fume pipes and steel pipes are pushed in from a rear end side with a propulsion jack.
[0003]
When a small-diameter tunnel is constructed by such a semi-shield method, the problem that arises when discharging the earth and sand excavated by a shield excavator from the tunnel is narrow because the tunnel diameter is small. It is how efficiently it is discharged in the space.
[0004]
One method for solving such a problem is a method of discharging earth and sand using a pressure feed pipe. When discharging sediment by this method, it is necessary to separate large gravel (which varies depending on excavation conditions, for example, a diameter of 60 mm or more) that cannot pass through the pressure-feed pipe from the sediment.
[0005]
As a sediment transport apparatus of a conventional semi-shield excavator having means for separating large-diameter gravel from sediment, there is a sediment transport apparatus disclosed in Japanese Patent Laid-Open No. 7-269294.
[0006]
As shown in the longitudinal sectional view of the semi-shielded excavator shown in FIG. 4, this earth and sand transporting device is excavated by a cutter head 32 provided at the front of the semi-shielded excavator main body 31 and taken into the chamber 31a. In the earth and sand transporting device of the earth-sealed semi-shield excavator that transports the earth and sand that has been collected by the earth and sand pump, the large amount of sand mixed in the earth and the rear of the discharge pipe 33 that discharges the earth and sand in the chamber 31a A large diameter cobblestone separating means 34 for separating a diameter cobble (large diameter gravel) is provided, and a hopper for sending the earth and sand separated by the large diameter cobblestone separating means 34 to the sediment pressure pump below the large diameter cobblestone separating means 34. 35 (generally called earth and sand discharge tank) is provided.
[0007]
The large-diameter cobblestone separating means (hereinafter referred to as trommel) 34 includes a plurality of vertical members 34a arranged in parallel with the axis of the semi-shielded excavator main body 31 so as to form a cylindrical shape, and the plurality of vertical members 34a. A cylindrical cage body is formed from a spiral member 34b wound spirally around the member 34a. The gap formed by the adjacent vertical member 34a and the spiral member 34b is such a size that large diameter cobblestones of a certain size or more that have entered the trommel 34 cannot pass, and only earth and sand having a size smaller than that can pass. Is set to
[0008]
Accordingly, the earth and sand passes through the trommel 34, falls downward, is accommodated in the hopper 35, and is discharged through the earth and sand discharge pipe 36 by the earth and sand pressure pump. It is discharged to the outside from an outlet provided on the side opposite to the entrance of the earth and sand, and is carried out by a route different from the earth and sand.
[0009]
[Problems to be solved by the invention]
However, when the trommel 34 is provided so as to be supported by the propulsion pipe 37, there are the following problems. In tunnel excavation work by the semi-shield method, when the excavation is performed by the cutter head of the semi-shield excavator body, if the cutter hits hard rock, etc., the cutter head will be prevented from rotating. The rotational reaction force is transmitted to the semi-shielded excavator body, and the semi-shielded excavator body rotates around the shaft core in a direction opposite to the cutter head rotation direction, so-called rolling phenomenon. And the relative position between the semi-shielded excavator body and the propulsion pipe may change .
[0010]
When rolling occurs, as shown in FIG. 5A, the trommel 34 provided on the propulsion pipe 37 side is the same as the center of the trommel 34 , and enters the inside of the trommel 34 to enter a certain amount. As shown in FIG. 5 (b), the fixed amount of the gap can be maintained by changing the relative position with the earth discharge pipe 33 (connected to the semi-shielded excavator main body) while maintaining the gap. In the extreme case, the trommel 34 and the soil discharge pipe 33 come into contact with each other. Since the trommel 34 rotates in order to efficiently separate earth and sand and gravel, if the trommel 34 and the drainage pipe 33 are in contact with each other, it becomes a safety risk and the operation must be stopped.
[0011]
In some cases, the soil discharge pipe 33 comes out of the trommel 34, so that the earth and sand cannot be supplied to the trommel 34, and the large-diameter gravel sorting operation is interrupted.
[0012]
The present invention relates to a tunnel excavator that can easily restore the relative positional relationship between the trommel and the soil discharge pipe to the normal positional relationship even if rolling occurs and the relative positional relationship between the trommel and the soil discharge pipe changes. It aims to provide a large-diameter gravel sorting apparatus.
[0013]
[Means for solving the problems]
A large-diameter gravel sorting apparatus for a first tunnel excavator according to the present invention is a tunnel excavator for separating large-diameter gravel contained in earth and sand that has been excavated by a cutter and taken into a chamber of the tunnel excavator from a face. The large-diameter gravel sorting apparatus is configured to pivotally attach one end of each of the adjustable hanging hangers to the left and right positions perpendicular to the sediment flow direction of the large-diameter gravel sorting apparatus. and the other end pivotally attached to the mounting hardware that is supported by the propulsion tube of the tunneling machine backward, a large-径礫sorting apparatus as suspended to the propulsion tube, in which a possible position fixes .
[0014]
Also, moving the provided along the mounting hardware in the longitudinal direction of the propulsion tube - by Le, is obtained by movably configured.
[0015]
In the large-diameter gravel sorting apparatus of the first tunnel excavator according to the present invention, the large-diameter gravel sorting apparatus is suspended from the propulsion pipe so as to be rotatable with a lifting tool whose length can be adjusted from the left and right sides. -Adjust the length of the left and right suspensions even if the center of the sediment inlet of the large-diameter gravel separator and the center of the drainage pipe that supplies the excavated soil to the large-diameter gravel separator are shifted by the ring. By doing so, the center of the sediment inlet of the large-diameter gravel sorting device and the center of the soil discharge pipe can be easily aligned.
[0016]
Therefore, the operation of the large-diameter gravel sorting device does not stop for a long time due to the occurrence of rolling.
[0017]
When unnecessary, the large-diameter gravel sorting device can be easily moved along the rail for monitoring and the like.
A large-diameter gravel sorting apparatus for a second tunnel excavator according to the present invention is a tunnel excavator for separating large-diameter gravel contained in earth and sand that has been excavated by a cutter and taken into a chamber of the tunnel excavator from a face. a large径礫fractionator, the large径礫fractionator and the propulsion pipe inner peripheral surface circumferentially along provided circumferential direction les of - the by fixing the moving member which moves on Le The large-diameter gravel sorting device is suspended from the propulsion pipe so that the position can be corrected .
[0018]
In addition, the circumferential rail provided along the circumferential direction can be moved by the longitudinal rail provided along the longitudinal direction of the propulsion pipe.
[0019]
In the large-diameter gravel sorting apparatus of the second tunnel excavator according to the present invention, the large-diameter gravel sorting apparatus and the inner peripheral surface of the propelling pipe move on a circumferential rail provided along the circumferential direction. Since the large-diameter gravel sorting device is suspended from the propelling pipe by fixing the moving body to the propelling pipe, the position can be corrected, so that the center of the earth and sand inlet of the large-diameter gravel sorting device and the large-diameter gravel sorting by rolling Even if the center of the earth removal pipe supplying the excavated earth and sand is shifted from the apparatus, it is easy to increase the diameter by moving the movable body on the circumferential rail provided along the circumferential direction. The center of the sediment inlet of the gravel sorting device and the center of the drainage pipe can be combined.
[0020]
Therefore, the operation of the large-diameter gravel sorting device does not stop for a long time due to the occurrence of rolling. When unnecessary, the circumferential rail provided along the circumferential direction is moved along the longitudinal rail provided along the longitudinal direction of the propulsion pipe, thereby performing monitoring and other work. It becomes easy to do.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view of a first embodiment of a large-diameter gravel sorting apparatus for a tunnel excavator according to the present invention, (a) is a perspective view of the large-diameter gravel sorting apparatus, and (b) is a large-diameter gravel sorting apparatus. FIG.
[0022]
This large-diameter gravel sorting apparatus is an apparatus for separating large-diameter gravel in the earth and sand discharged from the discharge pipe 1 of the semi-shield excavator, and has a cylindrical shape composed of a plurality of vertical members 2a and winding members 2b. A car body 2, a support frame 3 for supporting the cylindrical car body 2, a driving motor 4 for rotating the cylindrical car body 2 in the support frame 3, and a support frame 4 bar-type suspensions 5 having one end connected to the left and right sides before and after the longitudinal direction 3 and the other ends of the pair of left and right suspensions 5 are connected to the connection unit 6. A suspension body 8 having a moving roller 7 as an attachment metal, and a moving rail 10 provided so that the moving roller 7 can move along the longitudinal direction of the propulsion pipe 9. It is composed of In FIG. 1, reference numeral 3a denotes a support roller provided in the support frame 3 for rotating the car body 2.
[0023]
When the center of the cage body 2 of the large-diameter gravel sorting device and the center of the earthpipe 1 of the semi-shield excavator are displaced due to rolling, the length of the left and right hanging tools 5 is adjusted to The position of the suspended body 8 that suspends the gravel sorting device can be returned to the original state.
[0024]
Further, when unnecessary, it can be moved along the moving rail 10 by the moving roller 7 so that work such as monitoring can be easily performed .
[0025]
FIG. 2 is a perspective view of the large-diameter gravel sorting apparatus in the first embodiment of the large-diameter gravel sorting apparatus of the tunnel excavator according to the present invention when the hanging tool is of another type. In the case of this large-diameter gravel sorting apparatus, the length is adjusted by using the hanging tool 15 as a pantograph type, and the configuration of the other parts is the same as that of the large-diameter gravel sorting apparatus of the first embodiment. is there.
[0026]
FIG. 3 is an explanatory view of a second embodiment of the large-diameter gravel sorting apparatus of the tunnel excavator of the present invention, (a) is a front view of the large-diameter gravel sorting apparatus, and (b) is a large-diameter gravel sorting apparatus. FIG. In this large-diameter gravel sorting apparatus, a hanging tool 25 as a moving body is fixed to the support frame 3, and this hanging tool 25 is attached to a circumferential rail 26 provided in the circumferential direction of the propulsion pipe 9. The circumferential rail 26 itself can move along a longitudinal rail 27 provided in the longitudinal direction of the propulsion tube 9. And except these structures, it is the same structure as the large diameter gravel sorting apparatus of 1st embodiment.
[0027]
This also large径礫fractionator, Russia - large center of the basket portion 2 of径礫fractionator and Semishi a ring - when the center of the discharge drainpipe 1 of field shield machine is displaced is, circumferential Direction Les the suspender 25 -It can be restored to its original state by moving it along the lure 26.
[0028]
Further, when unnecessary, the operation such as monitoring can be easily performed by moving the circumferential rail 26 along the longitudinal rail 27.
[0029]
Needless to say, a lifting tool other than those described in the embodiment of the present invention may be used as long as it meets the object of the present invention.
[0030]
【The invention's effect】
According to the present invention, even when rolling occurs during excavation of a tunnel by a tunnel excavator, the operation of the large-diameter gravel sorting apparatus can be continued.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a first embodiment of a large-diameter gravel sorting apparatus for a tunnel excavator according to the present invention, wherein (a) is a perspective view of the large-diameter gravel sorting apparatus, and (b) is a large-diameter gravel sorting apparatus. It is a front view of an apparatus.
FIG. 2 is a perspective view of the large-diameter gravel sorting apparatus when the lifting tool is of another type in the first embodiment of the large-diameter gravel sorting apparatus of the tunnel excavator of the present invention.
FIG. 3 is an explanatory diagram of a second embodiment of a large-diameter gravel sorting apparatus for a tunnel excavator of the present invention, (a) is a front view of the large-diameter gravel sorting apparatus, and (b) is a large-diameter gravel sorting apparatus. It is a side view of an apparatus.
FIG. 4 is a longitudinal sectional view of a semi shield excavator.
FIGS. 5A and 5B are explanatory views showing that the center of the trommel and the center of the earth removal pipe are shifted due to rolling, in which FIG. 5A is before rolling occurs and FIG. 5B is after rolling occurs. The relative positional relationship between the trommel and the drainage pipe is shown.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Exhaust pipe 2 Basket body 3 Support frame 3a Support roller 4 Motor for drive
5 Lifting device 6 Connection portion 7 Roller for movement 8 Suspension body 9 Propulsion tube 10 Rail for movement 15 Lifting device 25 Hanging device 26 Circumferential rail 27 Longitudinal rail

Claims (4)

A large-diameter gravel sorting apparatus for separating a large-diameter gravel contained in the earth and sand that has been excavated by a cutter and taken into a chamber of the tunnel-excavating machine from a face, the sediment of the large-diameter gravel separating apparatus One end of each adjustable hanging tool is pivotably attached to both left and right positions orthogonal to the inflow direction, and the other end of each hanging tool is supported by a propulsion pipe behind the tunnel excavator. A large-diameter gravel sorting apparatus for a tunnel excavator characterized in that the large-diameter gravel sorting apparatus is suspended on the propelling pipe so that the position can be corrected . The large-diameter gravel sorting apparatus for a tunnel excavator according to claim 1, wherein the mounting hardware is made movable by a moving rail provided along the longitudinal direction of the propulsion pipe. A large-diameter gravel sorting apparatus for separating a large-diameter gravel contained in earth and sand that has been excavated by a cutter and taken into a chamber of a tunnel-excavating machine from a face, the large-diameter gravel sorting apparatus and propulsion Position correction is possible by attaching a moving body moving on a circumferential rail provided along the circumferential direction to the inner peripheral surface of the pipe so that the large-diameter gravel sorting device is suspended from the propulsion pipe. a big径礫fractionator of tunneling machine, characterized in that the. 4. The tunnel excavation according to claim 3, wherein the circumferential rail provided along the circumferential direction is movable by a longitudinal rail provided along the longitudinal direction of the propulsion pipe. Large diameter gravel sorting device.

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