JPS60233292A - Shield type tunnel drilling machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a shield type tunnel excavator.

I! Figure 6 shows an overview of a conventional shield type tunnel excavator, which consists of the main parts: body part (11), excavation part (2), propulsion part (3), earth removal part (4), and control part (5). After the tunnel excavator (A) excavates and removes the earth at the face, the excavator circle in the propulsion section (3) is The propulsion jacks arranged in the circumferential direction are lengthened to advance the trunk (1), and then the propulsion jacks are retracted to move the segment (6) t.
It is assembled into a ring shape and connected with bolts, and the cylindrical body that forms the outer wall of the tunnel (BILY construction) is finished by pouring cement on the inner surface.

However, because the soil quality of the ground (q) is complex, it is often difficult to form a straight cylindrical body (B) due to the meandering nature of the cylindrical body (B) as shown in Fig. In order to prevent this, conventional tunnel excavators simply adjust the jitter suppression of the propulsion section (3) as appropriate, so it has not been possible to reduce the waviness t of the cylindrical body section (B).

The present invention was proposed to solve these problems, and includes a plurality of radially movable guide plates disposed along the circumferential direction of the tip of the excavator body, and the guide plates. The control device includes an operating jack, the guide plate, and an excavator propulsion jack control device, and the control device includes a course detection sensor and a command device disposed in the body, and a detection signal from the sensor and a control device from the command device. The deviation of the setting signal is calculated, and one of the output signals is selectively transmitted to the guide plate operation jack and the other to the excavator propulsion jack according to a pre-installed program, so as to change the direction of movement of the trunk. The present invention relates to a shield type tunnel excavator characterized by comprising a calculation regulator configured as follows.

As described above, the shield type tunnel excavator according to the present invention is provided with a guide plate that is movable in the radial direction along the circumferential direction at the distal end of the body and a pushing force for operating the guide plate, and the tunnel excavator is operated by the excavator. During the work, the direction of excavation is detected by a course detection sensor in the control device, the detection signal is sent to a calculation adjustment device, and the deviation between the detection signal and the setting signal sent from the command device is calculated and processed in the calculation adjustment device, According to a pre-installed program, one of the output signals is sent to the guide plate operation jack to move the guide plate in the direction in which the excavator is to be bent, and the other output signal is sent to the propulsion jack to cause the excavator to bend. The excavator automatically adjusts the direction of propulsion of the excavator so that it can obtain a jacking force in the desired direction, and excavates the tunnel straight. It is possible to excavate a tunnel along the curve of

The illustrated embodiments of the present invention will be described below.

(11) is the body of a shield type tunnel excavator, (121)
(13) is the excavation department, (13) is the propulsion department, and (l) is the earth removal department.

Body part α1) Guide plates (15a) (15b X 15C ) Guide plate operating jack (16αX16h) (16C) (16d) installed on the rotation part as a Y fulcrum
Each jack is operated via a separately provided hydraulic control valve. In the figure, (179), (17A), and (17C) are hinged portions of the guide plate (15αX]5'') (15C).

In the embodiment shown in FIG.
)...(16d) is a location where the body part (although it is arranged on the outer periphery of 1υ, the body part α1) does not get in the way of excavation,
For example, it is arranged on the inner peripheral surface of the trunk. Further, in the illustrated embodiment, four guide plates (15α), . . . (15d) are provided, but the number may be arbitrary.

Figure 5 shows the guide plate and propulsion jack control device.
Reference numeral 211 denotes a tunnel excavator course detection sensor disposed within the body (11), and a detection signal from the sensor (2I) is input to the calculation regulator (22). On the other hand, a setting signal from the command unit (c) is input to the calculation regulator (η), and the sensor C1
! One circuit is connected to the propulsion section (hydraulic control valve (24α) for distributing pressure oil to each propulsion jack (24α) <24n),
The torso α1JP can be moved forward by the operation of the propulsion jack. Also, the other circuit is a guide plate (15
α)<15b)(15C)(15d) Y-driven guide plate operating jack (16α)(16b)(16C)(16
d) are connected to hydraulic control valves (25α), .

It should be noted that the output signal circuits of the arithmetic regulator (2) have four systems in one guide plate system, and the number of signal circuits in the other corresponds to the number of propulsion jacks of the propulsion section (13).

Since the illustrated embodiment is configured as described above, 5 For example, if the detection signal of the course detection sensor Cυ is biased downward with respect to the setting signal of the command device (c), the sensor c
! The difference between the signal of 1) and the signal of the command unit (2:1) is processed according to the program built into the arithmetic regulator (27J) and outputted in two separate systems.Then, one output signal is Control valve (25α), guide plate operation jack (16α)
) to the information board (15tL) 'lj! : Move it upward, and also move the guide plate (151?) ft toward the center of the body (+1) via the control valve (25+1) + guide plate operation jack (16C).

The other output signal is the control valve (24α) to (24rL)
Through this, the propulsion jack of the propulsion section 0 is driven, and the propulsion reaction force is applied to the existing segment 08! Take the trunk Ql)Y and move it forward. At this time, since there are many propulsion jacks for the propulsion section (+13), the signals from the calculation regulator (24) are selected so that a pushing force that bends the body (1υ) upwards is selected.
1 is added to the lower propulsion jack.

As a result, earth and sand are actively excavated above the trunk (11) in the ground (q), resulting in a cavity 09 or a low density mixture of water, etc., while the ground below the trunk (11) is Due to the same density, one body part 0υ receives an acting force from the ground (C1) that bends upward as shown by the arrow in Figure 3 during the jacking operation of the propulsion part 0, and the bending correction of the body part 01 occurs. It will be done.

In a shielded tunnel, the segment Qη has a length of approximately 17
11, is divided into 8 to 10 parts in the circumferential direction, and is connected with bolts for each excavation cycle of the excavator, so the upsetting part (
When the excavated soil from No. 121 is discharged through the earth removal section u''r, the body section α1) operates the propulsion jack of the propulsion section (I3) and moves forward by about 1 m, while a minute correction operation is performed. Then, a straight cylindrical body (B) made of segments 08 that constitutes the outer wall of the tunnel will be constructed.

Also, the tunnel needs to be not only straight but also curved.
In this case, by inputting the predetermined value of the bending direction when setting the command device (c), the guide plate (
15α) to (15d) and the propulsion unit (one row of propulsion jacks) are driven to excavate the body 0υ so that the cylindrical body (B) is bent and constructed.

According to the embodiment described above, a radially movable guide plate (15α)...C15d)'11 is installed at the tip of the body 0υ on a part of the shell of the body 01). In combination with the propulsion jack of the propulsion unit (131), the detection signal of the course detection sensor Cυ and the setting signal from the command unit (2) are processed by the arithmetic adjustment unit So, and the guide plate (15α)
-...(15d) and propulsion jack Z of propulsion section 0
Through control, a straight cylindrical body (B) or a cylindrical body (B) having a required bend is constructed.

Although the present invention has been described above with reference to embodiments, the present invention is of course not limited to such embodiments, and can be modified in various designs without departing from the spirit of the invention. be.

[Brief explanation of the drawing]

FIG. 1 is a vertical side view showing an embodiment of a shield type tunnel excavation machine according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a vertical side view showing its operating state, and FIG. Fig. 5 is a block diagram of the guide plate and propulsion jack control device, Fig. 6 is a vertical cross-sectional side view of a conventional shield type tunnel excavator, and Fig. 7 is a diagram showing the tunnel excavation performed by the same excavator. FIG. (11)-Jlljlm, (13>-* Shin W, (15
α) (15A) (15C) (15d)... Information board, (
16α) C16h) (16ty) (16d)...Guide plate operation jack, Qυ...Course detection sensor, Zeng...
Arithmetic regulator, (c)...command unit. Sub-Agent Patent Attorney: Shige Okamoto (3 persons)

Claims (1)

[Claims] The apparatus comprises a plurality of radially movable guide plates disposed along the circumferential direction of the tip of the excavator body, a guide plate operating jack, and a control device for the guide plates and the excavator propulsion jack. The control device calculates the deviation χ between the course detection sensor and the command device disposed in the body, and the detection signal of the sensor and the setting signal from the command device, and calculates the output signal according to a program installed in advance. A shield type tunnel excavation machine characterized by comprising a calculation regulator configured to selectively transmit signals from one side to the guide plate actuating jack and the other side to the excavator propulsion jack to change the traveling direction of the body. .