JPS62174498A - Method of measuring quantity of earth removed in shielding type tunnel excavator - 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 method for measuring the amount of earth removed by a shield type tunnel excavator.

(Prior Art) Fig. 9 shows an outline of a conventional shield type tunnel excavator, in which a screw conveyor (piercing through the bulkhead (CI) and extending to the rear of the machine) is connected to excavated earth fb)' by an excavation cutter (α). It is discharged by dJ, carried out with the top end open on the next stage conveyor (e) connected to the same conveyor (d), and transported outside the mine via the earth and sand hopper (1), transfer pump (σ), etc. It is being discharged.

(Problem to be solved by the invention) However, in the past, the volume of earth removed, which needed to be managed as the discharge amount of a shield tunnel excavator, relied on empirical measurements and evaluations by on-site engineers, resulting in variations. Many,
It was not possible to understand the comparison with the quantitative design excavation amount, and the amount of excavation was too much.
This caused the face to collapse, and there was an urgent need to establish a volumetric needle-side method for discharge.

(Means for Solving the Problems) The present invention has been proposed in view of the above-mentioned circumstances, and is a method for discharging excavated soil by a next-stage conveyor connected to a screw conveyor for discharging excavated soil in a shield type tunnel excavator. The total volume of the excavated soil is measured by conveying it at a constant speed and measuring the cross-sectional shape of the excavated soil on the same conveyor using a cross-sectional shape measuring device installed on the same conveyor. The purpose of this invention is to provide a method for quantitatively measuring the amount of soil removed by a shield tunnel excavator using a simple method. .

(Function) The present invention focuses on the fact that the next-stage conveyor connected to the screw conveyor for excavated soil discharge in a shield type tunnel excavator is an open type conveyor, and the excavated soil conveyed at a constant speed by the same conveyor. By measuring the cross-sectional shape, the amount of earth removed by a shield type tunnel excavator is measured.

(Effects of the Invention) As described above, according to the method of the present invention, the volume of earth removed by a shield type tunnel excavator can be easily measured, and quantitative excavation management can be performed.

(Example) The present invention will be described below with reference to the illustrated embodiments.

As shown in Fig. 1, excavation of the ground (2) by the cutter (IJ) of the shield type tunnel excavation machine (3) is discharged by the screw cone ear (5) that completely penetrates the bulkhead (4) and extends rearward. The next open type conveyor (6) connected to the conveyor (5) transports the excavated soil backward at a constant speed, and a cross-sectional shape measuring device ( 7), the cross-sectional shape of the excavated soil (31) on the conveyor (6) is measured, and the volume of the excavated soil (3) is measured.

It should be noted that the excavation ±(3
) is stored in the earth and sand hopper (8) and discharged outside the mine by the conveyance pump (9).

Figures 2 and 3 show the cross-sectional shape measuring device (7) of the excavated soil.
), the scanner α is screwed onto a screw αQ disposed on the conveyor (61 in the width direction thereof).
A cross-sectional shape measurement sensor α is attached to υ, and the screw rod ao+'i is rotated to scan the scanner (l) along the screw rod QOI.
]) t-by passing away said Konbaya (6)
This is to measure the entire cross-sectional shape of the excavation ± (3) being conveyed above.

FIG. 5 shows another embodiment of the earth removal cross-sectional shape measuring device (7), in which an array-shaped cross-sectional shape measuring sensor αJ is disposed on the concrete wheel (6).

Said sensor (IOS is an optical displacement sensor (sensor that measures displacement (distance) based on the principle of triangulation) with the characteristics shown in Figure 6, or an ultrasonic distance sensor (sonic wave sensor) with the characteristics shown in Figure 7. A non-contact measurement mode is realized using light and sound waves Q41 using a sensor that calculates the reflection distance as a displacement.In Fig. 4, the installation height of the sensor, d
is the displacement. As shown in Figure 8, this measurement result provides data that accurately determines the cross-sectional shape (81') of the excavated soil on the conveyor (6), so the conveyance speed of the conveyor (6) can be set to an arbitrary constant speed. By doing so, the following relationship is established: (volume of earth removed per 1 scan, m'') = <cross-sectional area of excavated soil -) x (conveyor speed per 1 scan, m/see). Total amount of soil is 611
1 will be given.

In addition, from the cross-sectional shape data of the excavated soil shown in FIG. 8, the cross-sectional area of the excavated soil can be easily calculated by integrating the data across the width direction of the conveyor (6). 6) In the feed direction, the volume of excavated soil can be easily calculated by determining the feed amount for each scan.

As described above, according to the method of the embodiment, it is possible to measure the amount of emissions from a shield type tunnel excavator, which could not be measured conventionally, and it is also possible to perform excavation management quantitatively.

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 present invention. .

[Brief explanation of drawings]

Fig. 1 is a vertical sectional side view showing an implementation state of the discharge needle side method for a shield type tunnel excavator according to the present invention, and Figs. 2 and 3 respectively show an example of the cross-sectional shape measuring device of excavated soil. FIG. 4 is an explanatory view of its operation, FIG. 5 is a longitudinal front view showing another embodiment of the excavated soil cross-sectional shape measuring device, and FIGS. 6 and 7 are respectively A characteristic curve diagram of the sensor of the cross-sectional shape measuring device, FIG. 8 is a chart showing measurement data by the cross-sectional shape measuring device, and FIG. 9 is a longitudinal side view showing the state of excavation and removal by a conventional shield type tunnel excavator. It is. (3)...Excavated soil, (4)...Screw conveyor for excavated soil discharge, (6)...Next stage conveyor, (7)...Excavated soil cross-sectional shape measuring device Sub-agent Patent attorney Shige Okamoto 2 people outside the text Figure 4 Figure 8 1 Condominium Width direction -

Claims (1)

[Claims] The excavated soil is conveyed at a constant speed by a next-stage conveyor connected to a screw conveyor for discharging excavated soil in a shield type tunnel excavator, and is measured by a cross-sectional shape measuring device installed on the next-stage conveyor. A method for measuring the amount of soil removed by a shield type tunnel excavator, characterized in that the volume of the excavated soil is measured by measuring the cross-sectional shape of the excavated soil on the same conveyor.