JPH0146680B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for correcting the propulsion direction of a structure that is press-fitted into the ground by a large number of hydraulic jacks.

[Conventional technology]

Conventionally, as a means for correcting the propulsion direction of a shield tunneling machine that is press-fitted into the ground, as disclosed in Japanese Patent Application Laid-Open No. 50-85128, a number of (16) rods are installed around the rear end of the tunneling machine body. Hydraulic jack for propulsion,
The hydraulic jacks for propulsion are divided into four jack groups, which are arranged at intervals around the main body of the excavator, and each hydraulic jack for propulsion is equipped with a separate liquid feeding amount adjustment type for each group. When connected to a pump device, if a deviation occurs in the propulsion direction of the shield tunneling machine, the amount of extension of the propulsion jacks of the group consisting of the pump device is changed relative to the amount of extension of the propulsion jacks of other groups, and the shield Means for correcting the direction of propulsion of an excavator are known.

[Problem to be solved by the invention]

In the case of the conventional direction correction means for a shield tunneling machine, when a deviation in the propulsion direction occurs in the diametrical direction of the tunneling machine body passing between adjacent jack groups,
Since the length of extension of all the propulsion jacks on one half of the machine body is made longer than the length of extension of all the propulsion jacks on the other half of the machine body, the direction of propulsion of the shield machine is It is difficult to quickly and effectively correct lateral deviations.

[Object and structure of the invention]

The object of the present invention is to provide a direction correction device for an underground press-fit structure that can advantageously solve the above-mentioned problems. A large number of hydraulic jacks for propulsion are arranged at equal intervals around the rotary distribution valve 5 , and the same number of liquid sending holes as the hydraulic jacks for propulsion are provided on the peripheral wall of the valve box 23 in the rotary distribution valve 5 . The liquid sending holes and the propulsion hydraulic jacks are connected to each other in the same phase, and the valve box 23 has a high pressure liquid supply pipe 20, an intermediate pressure liquid supply pipe 21, and a low pressure liquid supply pipe 22. is connected to the rotary valve body 13 of the rotary distribution valve 5, and a high-pressure liquid distribution recess 17 that communicates with the high-pressure liquid supply pipe 20 at one side in the diametrical direction of the rotary valve body; A low pressure liquid distribution recess 19 communicating with the low pressure liquid supply pipe 22 on the other side, and the high pressure liquid distribution recess 17 and the low pressure liquid distribution recess 19.
A propulsion direction correction device for an underground press-fitting structure is provided with medium pressure liquid distribution recesses 18 communicating with the medium pressure liquid supply pipe 21 on both sides between the intermediate pressure liquid supply pipes 21.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

The drawing shows an embodiment in which the present invention is implemented for correcting the propulsion direction of a shield tunneling machine.
12) propulsion hydraulic jacks 6A to 6L are arranged at equal intervals, and a large number (12 in the illustrated case) are arranged on the peripheral wall of the valve box 23 having a circular cross section in the rotary distribution valve 5.
The liquid feeding holes A to L are provided, and the liquid feeding holes A to L and the extension hydraulic pressure chambers of the respective propulsion hydraulic jacks 6A to 6L are connected to each other via piping so as to have the same phase. , and a central liquid passage hole 15 is provided in the rotary valve body 13 which is rotatably fitted into the valve box 23, and an inner annular liquid passage 16 and an outer annular liquid passage are provided at one end of the rotary valve body 13. 14 are provided.

One end of a medium pressure liquid supply pipe 21 communicating with the central liquid passage hole 15 and a high pressure liquid supply pipe 20 communicating with the inner annular liquid passage 16 are provided on the end plate of the valve box 23.
One end of the rotary valve body 13 is connected to one end of a low-pressure liquid supply pipe 22 that communicates with the outer annular liquid passage 14, and on one side of the rotary valve body in the diametrical direction. A high-pressure liquid distribution recess 17 is provided, and a low-pressure liquid distribution recess 19 is provided on the other side in the diametrical direction of the rotary valve body. Distribution recess 18
is provided on the circumferential surface of the rotary valve body 13.

The high-pressure liquid distribution recess 17 is connected to the high-pressure liquid supply pipe 20 via the liquid passage hole 24 and the inner annular liquid passage 16, and each medium-pressure liquid distribution recess 18 is connected to a passage extending in the diametrical direction of the rotary valve body. It is connected to the medium pressure liquid supply pipe 21 through the liquid hole 25 and the central liquid passage hole 15, and the low pressure distribution recess 19 is connected to the liquid passage hole 2.
6 and an outer annular liquid passage 14 to a low pressure liquid supply pipe 22 .

The excavator main body 1 is provided with a vertical inclination detector 2 for detecting inclination in the vertical direction with respect to the reference line Z-Z.
A and a left-right tilt detector 2B for detecting tilt in the left-right direction with respect to a scheduled reference line are fixed,
The output section of each of the tilt detectors 2A, 2B is connected to the input section of a control device 3 having a microcomputer via a conductor 7, and the power control circuit of the servo motor 4 is connected to the output section of the control device 3 via a conductor. 11
The rotary valve A central shaft 27 of the body 13 is connected to a rotating shaft of the servo motor 4.

The high pressure liquid supply pipe 2 is connected to the first hydraulic pump 9A.
0 is connected via the first switching valve 12A, and the first pressure regulating valve 8A is also connected, and the medium pressure liquid supply pipe 21 is connected to the second hydraulic pump 9B via the second switching valve 12B. and the second
A pressure regulating valve 8B is connected, and a third hydraulic pump 9C
In this case, the low pressure liquid supply pipe 22 is connected to the third switching valve 12.
C, and the third pressure regulating valve 8
C is connected and there is no need to correct the propulsion direction of the shield tunneling machine, each hydraulic pump 9A, 9
Each pressure regulating valve 8A, 8B, 8C is adjusted by a signal from the control device 3 so that liquid of the same pressure is pumped from B, 9C. When it is necessary to correct the propulsion direction of the shield tunneling machine, the pressure regulating valve is adjusted by a signal from the control device 3, and high pressure liquid is sent from the first hydraulic pump 9A to the high pressure liquid supply pipe 20, Medium pressure liquid is sent from the second hydraulic pump 9B to the medium pressure liquid supply line 21, and the third hydraulic pump 9
Low pressure liquid is sent from C to the low pressure liquid supply pipe 22.
Also, if you want to shorten each propulsion hydraulic jack,
Each switching valve 12A, 12B, 12C is switched to the shortened position.

The detected values of the inclination detectors 2A and 2B are calculated by a calculation device in the control device 3, and the calculated values are compared with a pre-programmed value, so that the direction of propulsion of the shield excavator deviates from the planned reference line. In response to a signal from the control device 3, the servo motor 4 is operated, and the rotary valve body 13 is rotated by the servo motor 4, so that the rotary valve body 13 is directed toward the propulsion liquid on the opposite side to the correction direction. It is arranged to send high pressure liquid to the pressure jack and to send low pressure liquid to the propulsion hydraulic jack on the correction direction side. For example, if it is necessary to correct the propulsion direction of the shield tunneling machine diagonally upward, high pressure liquid is sent to the lower propulsion hydraulic jacks 6I, 6J, 6K, and the upper propulsion hydraulic jacks 6C, 6
Low-pressure liquid is sent to D and 6E, and the intermediate propulsion hydraulic jacks 6A, 6B, 6L and 6F, 6
The orientation of the rotary valve body 13 is set so that medium pressure liquid is sent to G and 6H.

When the direction of the rotary valve body 13 is set in this way, high pressure fluid is supplied to the propulsion hydraulic jack on the side opposite to the side where the direction is to be corrected, and at the same time, the high pressure liquid is supplied to the propulsion hydraulic jack on the side where the direction is to be corrected. Since low-pressure liquid is sent and medium-pressure liquid is sent to the other propulsion hydraulic jacks, the direction of the shield tunneling machine can be quickly and efficiently corrected. Furthermore, by simply rotating the rotary valve body 13, the positions of the propulsion hydraulic cylinder that supplies high-pressure liquid and the propulsion hydraulic cylinder that supplies low-pressure liquid can be changed to any position around the excavator main body. Therefore, the direction of propulsion of the shield tunneling machine can be adjusted to any direction.

Note that the present invention can also be implemented to correct the direction of a caisson that is vertically press-fitted into the ground.

〔Effect of the invention〕

Since this invention is configured as described above,
This produces the effects described below.

Among the many propulsion hydraulic jacks grounded around the underground injection structure, high-pressure liquid is sent to one of the propulsion hydraulic jacks in the diametrical direction of the underground injection structure, and at the same time Low-pressure liquid is sent to the other diametrical propulsion hydraulic jack, and medium-pressure liquid is sent to the other propulsion hydraulic jack located between these propulsion hydraulic jacks. By simply rotating the rotary valve body 13 in the rotary distribution valve 5, the propulsion direction can be quickly and efficiently corrected, and by simply rotating the rotary valve body 13 in the rotary distribution valve 5, the propulsion hydraulic cylinder that supplies high-pressure liquid and the propulsion hydraulic cylinder that supplies low-pressure liquid can be used. The position of the hydraulic cylinder can be changed to any position around the underground press-in structure, so the propulsion direction of the underground press-in structure can be adjusted to any direction, and it Therefore, the propulsion direction of the underground press-fit structure can be quickly and efficiently corrected in any direction.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic diagram showing a propulsion direction correction device for an underground press-in structure, Fig. 2 is a longitudinal side view showing a rotary distribution valve with a servo motor, Figure 3 is a sectional view taken along the - line in Figure 2, Figure 4 is a sectional view taken along the - line in Figure 2, and Figure 5 is a partially cutaway perspective view showing the arrangement of the hydraulic jack for propulsion with respect to an underground injection structure. It is. In the figure, 1 is the excavator main body, 2A is a vertical inclination detector, 2B is a left and right inclination detector, 3 is a control device,
4 is a servo motor, 5 is a rotary distribution valve, 6A
-6L is a hydraulic jack for propulsion, 8A-8C is a pressure regulating valve, 9A-9C is a hydraulic pump, 12A-12C is a switching valve, 13 is a rotary valve body, 14 is an outer annular liquid passage, 15 is a central hole, 16 is an inner annular liquid passage, 17 is a high pressure liquid distribution recess, 18 is a medium pressure liquid distribution recess, 19 is a low pressure liquid distribution recess, 20 is a high pressure liquid supply pipe, 21 is a medium pressure liquid supply pipe, and 22 is a low pressure This is a liquid supply pipe.

Claims (1)

[Claims] 1. A large number of hydraulic jacks for propulsion are arranged at equal intervals around the cylindrical underground injection structure, and the same number of liquid sending holes as the hydraulic jacks for propulsion are provided on the peripheral wall of the valve box 23 in the rotary distribution valve 5. The liquid feeding holes and the propulsion hydraulic jacks in the peripheral wall of the valve box 23 are connected to each other in the same phase. 21 and a low-pressure liquid supply pipe 22 are connected, and a high-pressure liquid distribution recess is provided around the rotary valve body 13 in the rotary distribution valve 5 and communicates with the high-pressure liquid supply pipe 20 at one side in the diametrical direction of the rotary valve body. 17, a low-pressure liquid distribution recess 19 communicating with the low-pressure liquid supply pipe 22 on the other side in the diametrical direction of the rotary valve body, and the medium pressure on both sides between the high-pressure liquid distribution recess 17 and the low-pressure liquid distribution recess 19. A propulsion direction correction device for an underground press-fitting structure, which is provided with a medium-pressure liquid distribution recess 18 communicating with a liquid supply pipe 21.