JPH0313398B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring propulsion accuracy in a propulsion method.

Although the propulsion method for small-diameter pipes such as water and sewage systems does not allow humans to penetrate inside, it is necessary to measure the straightness of buried pipes even in such conditions.

In the conventional measurement method, various targets (illuminated targets, targets with built-in light-receiving elements, targets equipped with light emitters such as LEDs, etc.) are installed at the tip of the excavation equipment, and this is installed on the starting side of the measuring instrument. This is a method to determine the amount of displacement of buried pipes.

These conventional methods have the following problems because the target of the measuring device is fixed to the tip of the excavating and removing device.

(b) Since it is directly exposed to vibrations and shocks from excavation and earth removal work, it is likely to become unusable during excavation and earth removal work.

(b) The target described above is vulnerable to water and is located at the tip of the borehole where there is a high possibility of flooding, so there are many problems when using it.

(c) Since it is used under harsh conditions with many vibrations and shocks, it is prone to failure, but it is difficult to extract only the target of the measuring device in order to deal with such situations.

The present invention has been made to solve the above-mentioned problems, and by using a measuring device in which the target of the measuring device is configured to be movable,
It is unaffected by vibrations and shocks from excavation and soil removal work, and even by water in the borehole, making it easy to deal with breakdowns, etc., and also allows for displacement measurement at desired positions within the borehole. The purpose of this study is to provide a method for measuring propulsion accuracy in a propulsion method.

Next, a method for measuring propulsion accuracy in the propulsion method of the present invention will be explained, but before that, each device used in the present invention will be explained.

The propulsion accuracy measurement device of the present invention includes a measurement pipe 1 piped between a buried pipe A and an excavation and earth removal device C;
The measuring instrument 4 is installed on the starting side B and collimates the measuring target 2. (Fig. 1) (a) Excavation and removal equipment (Figs. 1 and 4) The excavation and removal equipment C used in the present invention is used in a known propulsion method, and has an earth removal equipment 52 such as an auger inside. An excavation device 51 is provided at the tip of the installed cylindrical body 53.

The diameter of the hole formed by the excavation device 51 is larger than that of the cylindrical body 53, and the buried pipe A has a diameter that just fits within the excavation hole.

Therefore, a space is created between the buried pipe A and the cylindrical body 53.

(b) Measuring tube (FIG. 2) The measuring tube 1 is a small diameter tube having a hollow portion 11 with no unevenness inside.

Then, insert the insertion traction tool 3, which will be described later, into its tip.
1' is provided with a pulley 12.

This measuring pipe 1 is installed between the buried pipe A and the cylindrical body 53 of the excavating and removing device C, with a length equal to the entire length of the buried pipe A.

(c) Measurement target The measurement target 2 is equipped with an illumination device 21 and has a grid-like scale, with an LED in the center.
A known device is used, such as one having a light emitting body, or one having a built-in light receiving element.

The measurement target 2 is installed on the starting side B of the trolley 3, which will be described later.

(d) Trolley The trolley 3 is a device in which the measurement target 2 is installed facing the starting side B and moves within the measurement pipe 1.

A string-like pulling tool 3 is attached to the front and rear of the trolley 3.
1, and the insertion traction tool 31' is attached.

The pulling tool 31 for pulling out is connected to the outside of the tube, and the other pulling tool 31' for insertion is connected to the pulley 1 at the tip of the measuring tube 1.
Connect to outside the pipe via 2.

When moving the cart 3 into the measuring tube 1, pull the insertion pulling tool 31' and move the cart 3 into the measuring tube 1.
When pulling out from inside, use puller 31 for pulling out
pull.

(e) Measuring instrument The measuring instrument 4 is installed on the starting side B, and uses a known device corresponding to the measurement target 2 described above.

Next, a method of measuring propulsion accuracy using each of the above devices will be explained.

(B) Piping of the measurement pipe (Fig. 1) From the starting side B, the excavation and removal device C and the buried pipe A are forced into the ground by the propulsion jack device D while removing the earth from the face.

Then, the measurement pipe 1 containing the measurement target 2 is installed in parallel to the buried pipe A in the gap between the buried pipe A and the cylindrical body 53 of the excavation and removal device C.

(b) Moving and measuring the measurement target The trolley 3 is advanced by pulling the insertion traction tool 31', and the measurement target 2 is moved into the measurement tube 1.
It is moved to the tip and the displacement is measured by the measuring instrument 4 on the starting side B.

If there is a possibility that vibrations or shocks caused by excavation or earth removal work may affect the measurement target 2, pull the drawer traction tool 31 to move the trolley 3 backward and move the measurement target 2 to the measurement pipe 1. Pull it outside.

(c) Other embodiments 1 (Figs. 5 and 6) If an excavating earth removing device C is used in which the shaft of the earth removing device 52 such as an auger is formed into a hollow cylinder, the hollow portion E can be connected to the measuring pipe 1. It is also possible to move the trolley 3 within the hollow portion E and perform measurements.

(D) Other Examples 2 Regarding the method of driving the cart 3, other than the above-mentioned embodiments, there is a method in which only the pull-out traction tool 31 is attached to the cart 3 and the movement into the measuring tube 1 is performed using air pressure. It is also conceivable to incorporate a drive means such as a battery or a motor into the trolley 3 itself and remotely control it to move the trolley 3 itself.

Since the present invention is as described above, the following effects can be expected.

(b) The measurement target is placed on a trolley that moves inside the measurement pipe, so it can be removed from the mine at any time.

Therefore, if there is a risk of being affected by vibration, shock, water, etc., it is sufficient to pull it out of the measurement tube, and in the event of a failure, it can also be pulled out of the measurement tube and treated.

(b) There is no need to take measures against vibration, shock, and water on the measurement target itself.

(c) It is possible to measure not only the displacement of the tip of the buried pipe, that is, the displacement of the face, but also the displacement at a desired position of the buried pipe, if necessary.

(d) It is highly versatile, as it can be used not only for horizontal pipe burying work, but also vertically for vertical shafts, underground walls, etc.

(e) The measurement target used in the method of the present invention can be taken out of the buried pipe when it is not needed, so it is more durable than the conventional measurement target that is always located at the tip of the borehole.

[Brief explanation of the drawing]

Figures 1-2, 4: An explanatory diagram of an embodiment of the present invention,
Figure 3: Explanatory diagram of measurement target, 5th to 6th
Figure: Explanatory diagram of other embodiments 1: Measurement pipe, 2: Measurement target, 3: Trolley, 4: Measuring instrument, A: Buried pipe, B: Starting side,
C: Excavation and soil removal equipment.

Claims (1)

[Scope of Claims] 1. A measurement pipe is installed in the buried pipe for propulsion in parallel with the buried pipe, a movable trolley with a measurement target installed inside the measurement pipe is arranged, and a measuring instrument on the starting side is used to set the measurement target. A method for measuring propulsion accuracy in a propulsion method, which is characterized by collimating the