JPS611796A - Apparatus for detecting tuyree state - 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 [Field of Industrial Application] The present invention relates to a face condition detection device that uses a sealed star shield and is used in the field of shield construction methods.

[Prior art]

In the shield construction method using a sealed shield, the condition of the face (%) can be confirmed directly and visually! W! I can't do anything.

Therefore, in the past, the earth pressure was measured on the top outer surface of the shield 7 seam or on the bulkhead, etc. : #R is attached to detect the earth pressure situation i. however.

Since an earth pressure gauge was attached to the fixed part □, there was a problem in that it was difficult to ascertain the truth of the earth pressure due to the arching phenomenon and consolidation of the excavated earth and sand.

[Structure of the invention]

The present invention arranges a plurality of earth pressure gauges on the cutter face plate of a sealed shield tunneling machine so that when the canter face plate is rotated, each rotation locus passes through almost the entire area of the face contact surface of the cutter face plate. The position corresponding to the rotation angle of the cutter face plate of the manometer and the measured tonosho data are input into a data processing device, and the earth pressure distribution data □ is calculated.Furthermore, the display device calculates the tonosho of the face based on the earth pressure distribution data. Did you change to 5 to visually display the distribution status? I'Characteristics〇〇 [Embodiment] An embodiment of the present invention will be described with reference to the drawings.

This embodiment is an example in which the present invention is applied to a muddy water shield excavator. Fig. 81 is a side sectional view of the shield tunneling machine, and Fig. 2 is a front view as seen from the face side. In these figures, numeral 1 is the shield frame, 2 is the cutter face plate, and 3 is the cutter face plate provided on the front side of the cutter face plate 2. Cutter bit, 4 is cutter shaft 5
6 is a mud feeding pipe.

7 is a mud drain pipe, and 8 is a bulkhead.

In this shield excavator, the cutter face plate 2 is pressed forward (to the left in FIG. 1) together with the shield frame l by a suppressor (not shown) and rotated by the drive device 4, and the face is cut by the cutter bit 3. At this time, the excavated earth and sand enters the cutter chamber 9 through the slit 9 provided in the cutter face plate 2, and is stirred and mixed with the muddy water sent by the mud feed pipe 6, and then flows into the cutter chamber 9. While maintaining the inside at a predetermined pressure, 7% of the mud is passed through the drainage pipe and discharged to the ground.The above operation is similar to that of a conventional shield excavator.

In the non-embodiment, a plurality of earth pressure gauges 11 are arranged on the front surface and outer peripheral surface of the temporary cutter II 2 of the shield tunneling machine. These plural earth pressure gauges are arranged at predetermined intervals in the radial direction around the center of one rotation so that when the cutter face plate 2 rotates, each rotation trajectory passes through almost the entire area of the face contact surface of the cutter face plate 2. In addition, these earth pressure gauges 11 have 5
A data processing device 13 is electrically connected through a slip ring 12 to the data processing device 13, and each earth pressure data detected by the earth pressure gauge 1.1 is sent to the data processing device 13. Further, 14 is a cutter rotation angle detector that detects the rotation angle of the cutter face plate 2 and the rotating plate 15 that rotates in unison. The position information used as the position data is input to the data processing device 13 in the same way as the soil pressure data detected by the earth pressure gauge.

The data processing device 13 has an arithmetic processing device and a storage device, and is configured to calculate 9 earth pressure distribution data for every rotation of the cutter 1g based on the earth pressure data, rotation angle data, and cutter rotation angle data. Further, according to the data correction program L6, correction is applied to bring the data closer to the true value, thereby calculating more accurate earth pressure distribution data. Note that the data correction program 16 is based on experiments conducted on the ground in advance.
They are manufactured according to the type of soil, hardness, softness, etc.

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Further, a visual display device 17 is electrically connected to the data processing device tatc. This visual display device 17 displays the earth pressure distribution situation of the face in a graph 42 based on the earth pressure distribution data sent from the data processing device L3. As shown in Figure 4, the Tonosho distribution in front of the face and the longitudinal section of the face (for example, A-AMtCa in Figure 4)
It simultaneously displays the earth pressure distribution in the depression section. In addition, various methods of display can be considered, such as display using a change in color tone, display using isobar diagrams, etc. In addition, C in FIG. 4 represents a shield tunneling machine.

According to the face condition detection device having the above configuration, when the face is excavated by the shield excavator, the earth pressure data of the entire face can be obtained by the plurality of earth pressure gauges II attached to the cutter face plate 2. The obtained earth pressure data is sent to the data processing device 13 together with the data detected by the cutter rotation angle detector 14, and is corrected to a value close to the true value by the data correction program 2m 16, and is adjusted every time the cutter rotates. It is processed and stored in a storage device as Tonosho distribution data. The stored tonosho distribution data is visually displayed by the visual display device 17 as the tonosho distribution in the front of the face and in the longitudinal section of the face.

In addition, although the present invention is applied to a muddy water shield tunneling machine in the above example, the present invention can also be applied to other closed type shield tunneling machines such as a Tonosho balance type or a limited pressure shield tunneling machine. Can be applied.

〔Effect of the invention〕

According to the present invention, the following excellent effects are achieved.

■ Since the earth pressure gauge is attached to the cutter face plate, which is a rotating part, arching and caking of earth and sand near the earth pressure gauge are less likely to occur, compared to conventional models in which the earth pressure #t is attached to a fixed part. , it is easy to capture the true value of earth pressure.

■ It is possible to visually grasp the earth pressure distribution at the face, which cannot be confirmed directly, in a sealed shield excavator, and as a result, it is possible to quickly detect collapse of the face, overconsolidation of the ground, etc., and take appropriate countermeasures. It can be done quickly. Therefore, it is possible to prevent situations such as the collapse of the upper road surface or the inability to excavate due to an increase in cutter load.

(As mentioned above, since the distribution of the slope of the face can be ascertained, the presence or absence of a cavity and its position can also be accurately detected.

[Brief explanation of drawings]

WJ1-FIG. 4 show one embodiment of the present invention, and the first
The figure is a longitudinal cross-sectional view of the front part of the shield tunneling machine, Figure 2 is a front view of the shield tunneling machine seen from the face side, Figure 3 is a system diagram of the entire detection device, and Figure 4 is a front view of the visual display device. be. . lo...Shield frame, 2...Cutter face plate, 3...
..., Ivy pit, 11... Earth pressure gauge, 13... Data processing device, L4... Cutter rotation angle detector, 16
...Data correction program, 17...Visual display device. Applicant Ishikawajimabari JJL Industries Co., Ltd. Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A plurality of earth pressure gauges are installed on the cutter face plate of a sealed shield excavator, and are positioned so that when the cutter face plate rotates, each rotation locus passes through almost the entire area of the face contact surface of the cutter face plate, and the rotation of the cutter face plate. a data processing device that calculates earth pressure distribution data based on the position data of each earth pressure gauge according to the angle and the earth pressure data measured by each earth pressure gauge; and a data processing device that calculates earth pressure distribution data of the face based on the earth pressure distribution data. 1. A face condition detection device comprising: a display device that visually displays;