JPH1018769A - Propulsion construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate target excavating position confirmation to the ground surface by making the steering characteristic of a guide body learned by the learning from the measured result of dislocation at the time of propulsion- excavating laterally in the specified attitude state of an excavating inclined pressure receiving face of a guide body. SOLUTION: In a crossing process, excavation is performed with an inclined pressure receiving face 65 of a guide body 6 turned downward for horizontal propulsion from a spot A1 to a spot A2, and then a second propulsion pipe 4 is gripped to turn the inclined pressure receiving face 65 upward for excavation and propulsion. The learning of a vertical steering characteristic of the guide body 6 is judged from the measured result of a dislocation degree at the time of excavating by the fixed distance. A surfacing path C can thereby be predicted on the basis of the learning result so as to be able to calculate the position of the spot A2 more appropriately, In a surfacing process, the guide body 6 can accurately come out to the spot A3 if the surfacing path C described by a dotted line can be predicted by accurately grasping soil quality.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion method in which a propulsion pipe is propelled underground for the purpose of drawing a gas pipe or the like into the ground and burying the same. A plurality of propulsion pipes connected to each other so as to be swingable with each other, and a leading conductor having an inclined pressure receiving surface which is provided at the leading end of the plurality of propulsion pipes and can be switched between an upward position and a downward position. Using a propelling body equipped with
A traversing step of proceeding from the point to a second point separated along the ground surface, and a third presetting of the ground surface from the second point
The present invention relates to a propulsion method including a levitation step toward a point.

[0002]

2. Description of the Related Art In this type of propulsion method, which is found in the prior art, when determining the position of a second point where the crossing process is shifted to the levitation process, the soil under the ground surface in the area to which the propulsion method is applied is determined. Assuming vaguely from only the information obtained from the external appearance, such as the state of the ground surface above it and the surrounding terrain, this was inferred by inferring the vertical steering characteristics of the leading conductor based on this assumed soil quality. The position of the second point has been determined by predicting a propulsion path in the floating process of the leading conductor based on the vertical steering characteristics.

[0003]

Therefore, in the above-described propulsion method in the conventional example, the soil properties and the vertical steering characteristics of the leading conductor are deduced only by vague information obtained from the appearance of the land and the ground surface. Therefore, when the actual soil quality under the ground surface is different from the typical soil texture assumed from the land and the appearance of the ground surface, the prediction of the propulsion route in the levitation process of the leading conductor becomes inaccurate. As a result, the position of the second point is erroneously determined, and the leading conductor often appears at a position greatly deviating from the target third point, leaving room for improvement. SUMMARY OF THE INVENTION It is an object of the present invention to provide a propulsion method in which a tip conductor is more accurately exposed near a target point in view of the above-mentioned drawbacks found in the prior art exemplified above.

[0004]

During the traversing step, the vertical steering characteristics of the front conductor with respect to the soil are adjusted by shifting the position of the front conductor when the inclined pressure receiving surface is propelled in a fixed posture. A propulsion method that learns from a degree measurement result, predicts a propulsion path in the ascent process based on the learning result, and determines the position of the second point.

[Effects of the Invention] Due to the above-mentioned features,
In the propulsion method according to the present invention, the vertical steering characteristics of the leading conductor with respect to the soil properties are determined (instead of relying only on vague information obtained from the appearance of the land and the ground surface) by setting the inclined pressure receiving surface of the leading conductor to a constant posture. From the measurement result of the specific value of `` the degree of displacement of the position of the tip conductor when propelled in this state, '' and based on the learning result, the soil properties and the vertical steering characteristics of the tip conductor corresponding to the soil property are determined. Prediction is possible, so that the actual soil quality under the ground surface does not differ from the typical soil texture assumed from the land and the appearance of the ground surface, and the prediction of the propulsion route in the levitation process of the leading conductor is more accurate As a result, the determination of the position of the second point is more accurate, and a specific effect is produced in that the leading conductor is more accurately displayed near the target point (the third point).

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows an example of equipment capable of implementing a propulsion method according to the present invention, together with an example of a cross section of a terrain to which the propulsion method is applied. In FIG. 1, the propulsion device B includes a plurality of propulsion tubes 4,. . . , A plurality of propulsion tubes 4,. . . , A propulsion body 1 comprising a leading conductor 6 provided at the head of the propulsion unit, a propulsion device 8, and a propulsion tube winding mechanism 10. . . Each other and a plurality of propulsion tubes 4,. . . The connection method between the leading portion of the wire and the tip conductor 6 is as follows.
The members adjacent to each other, for example, a horizontal axis and a vertical axis, such as two axes that intersect at right angles to each other, rather than using a method with a high degree of freedom that can swing around, on the nature of the present invention,
It is better to use the propulsion device with the structure in which the degree of freedom is intentionally reduced and the members are limited to one rocking axis, or to use the propulsion device with such a limited structure. It can be performed accurately, and the advantages of the present invention can be brought out more effectively. Here, in order to facilitate understanding of the invention, a plurality of propulsion tubes 4,. . . Each other and a plurality of propulsion tubes 4,. . . The description will be made on the premise that a construction method is adopted in which the head portion and the leading conductor 6 are connected in such a manner as to swing only around an axis parallel to the ground surface, in other words, only parallel to the ground surface. The propulsion device 8 is installed on the bottom surface of the working pit 100 excavated and formed from the surface of the ground, and grips the tip conductor 6 and the propulsion pipe 4 and extrudes it with hydraulic pressure. From the point A1 (an example of the first point in the ground) located laterally below the front conductor 6, and the plurality of propulsion tubes 4,. . , The propulsion body 1 can be propelled underground. In this propulsion operation, the propulsion direction of the leading conductor 6 can be controlled by the direction of the inclined pressure receiving surface 65 provided at the tip of the leading conductor 6 so as to be inclined with respect to the axis along the longitudinal direction of the leading conductor 6. Has become. That is, the leading conductor 6 is
A main body 60 is connected to the propulsion pipe 4 at the head so as to be swingable about a single axis, and a turning part 62 integrally formed with an inclined pressure receiving surface 65 is provided. 62 can be rotated with respect to the main body 60 around an axis along the longitudinal direction of the main body 60. Then, when the inclined pressure receiving surface 65 is pushed out from the rear in a state of the upward posture, the leading conductor 6 is propelled downward, and when switched to the downward posture, starts to protrude upward. Each of the plurality of propulsion tubes 4,. . . Each other,
They are connected to each other so as to be able to swing around a horizontal axis.
FIG. 1 shows the progress of a work process in which the propelling body 1 is propelled from a point A1 in the pit 100 and the tip of the conductor 6 is exposed at a point A3 on the ground surface. In accordance with a simple method, the traversing step of starting the leading conductor 6 from the point A1 in the ground to the point A2 (an example of the second point) separated from the point A1 along the ground surface according to the following steps: And a levitation step from the point A2 to a preset point A3 (an example of a third point) on the ground surface.

(Crossing Step) In the crossing step, the propulsion unit 8 only needs to propel the leading propulsion pipe 4 first and hold it in the ground, since the propulsion unit 8 only needs to propel it horizontally and straight from the point A1 to the point A2. When the propulsion is performed with the inclined pressure receiving surface 65 of the tip conductor 6 turned downward, and then the second propulsion pipe 4 is gripped and propelled, the propulsion is performed with the inclined pressure receiving surface 65 upward. Furthermore, if the direction of the inclined pressure receiving surface 65 is switched up and down for each predetermined unit propulsion distance, the tip conductor 6 can be propelled horizontally as a whole as a result.

(Floating Step) Here, as the floating step,
A method is adopted in which the tip conductor 6 is exposed to the ground surface at a stretch by propelling the inclined pressure receiving surface 65 in a downward state. By the way, when the levitation step is performed by the above-described method, the leading conductor 6 is positioned as accurately as possible at the target point A 3
Being exposed at a point close to is very important to facilitate subsequent work. Then, when the levitation process is started at a certain point in the ground, for example, A2, how far the tip conductor 6 appears on the ground horizontally from that point is basically determined by starting the levitation process. It can be considered that it is determined by the depth of the spot and the soil quality of the nearby area. Now, since the depth of the starting point of the ascent process can be considered to be known according to the actual work, after all, it is necessary to predict the ascent route C drawn by the dotted line by grasping the soil as accurately as possible. If it is possible, it becomes possible to make the leading conductor 6 appear at the point A3 as accurately as possible.
In other words, what kind of curve is actually the floating path C of the leading conductor 6 from the point A2 to the point A3 in FIG.
That is, the propulsion route of the leading conductor 6 is basically determined by what steering characteristics the leading conductor 6 exhibits with respect to the soil there.

(Learning of Steering Characteristics) In the present embodiment, the actual vertical steering characteristics of the leading conductor 6 with respect to the soil are learned during the traversing process performed prior to the levitation process, and the learning result is concretely described. The basis is to predict the steering characteristics of the leading conductor 6 with respect to the soil actually encountered in the ascent process (although the steering characteristics when trying to propel the leading conductor 6 upward are particularly required). Take the technique. That is, generally speaking, it can be considered that the soil encountered in the ascent process and the soil encountered in the crossing process are naturally similar. The learning of the vertical steering characteristics of the leading conductor 6 actually observed in the traversing process is performed by pushing the inclined pressure receiving surface 65 in a fixed posture (for example, a downward posture in which the leading conductor 6 can be pushed upward) for a fixed distance. The measurement can be performed based on the measurement result of the degree of displacement of the position of the leading conductor 6 when this is performed. Then, the ascending route C can be predicted based on the learning result, and as a result, the position of the point A2 can be determined more appropriately. Here, as a method of measuring the degree of displacement of the position of the leading conductor 6, for example, the following form is possible. That is, as shown in FIG.
The attitude angle detecting means 68 capable of detecting the vertical attitude angle θ of the axis X of the axis with respect to the horizontal plane is provided together with the inclination direction detecting means 66 capable of detecting the direction of the inclined pressure receiving surface 65 (upward or downward). When the propulsion unit 8 pushes out the horizontal leading conductor 6 shown by a two-dot chain line to the left in FIG. 2 by a predetermined amount a while holding the inclined pressure receiving surface 65 downward, for example, Assuming that the inclined posture is as shown by the solid line in the center of FIG. 2, the tip end of the front conductor 6 is triangularly determined from the vertical posture angle θ of the extruded front conductor 6 and the predetermined amount a. Can be calculated, and the two values a and b obtained are treated as the degree of deviation of the position of the leading conductor 6, whereby the learning of the vertical steering characteristics of the leading conductor 6 can be performed.

[Alternative Embodiment] As the propulsion body 1 used in the propulsion method according to the present invention, the behavior of the front conductor 6 in the ground at the time of propulsion is made simpler, so that the steering characteristic of the front conductor 6 in the crossing process is improved. In order to make it easier to ascertain the position, the leading conductor 6 and the plurality of propulsion tubes 4,. . . It is suitable to use the one that is set to be able to swing only with the horizontal shaft center, but the same concept can be applied to the propulsion method using a propulsion structure that can swing around both the vertical and horizontal axes. It is.

[0011] In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a propulsion method according to the present invention.

FIG. 2 is a conceptual diagram showing a method of measuring the degree of displacement of the position of a leading conductor.

[Explanation of symbols]

 6 tip conductor 65 inclined pressure receiving surface A2 2nd point

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Kokegumi Yamada 1-1-1 Hama, Amagasaki-shi, Hyogo Pref.

Claims (1)

[Claims] 1. A plurality of propulsion pipes connected to each other so as to be able to swing around one axis, and an inclination provided at a leading end of the plurality of propulsion pipes, which can be switched between an upward posture and a downward posture. Using a propulsion body with a tip conductor having a pressure receiving surface,
A traversing step of advancing the leading conductor from a first point in the ground to a second point separated along the ground surface, and a floating step from the second point to a third predetermined point on the ground surface. A propulsion method comprising: providing a vertical steering characteristic of the leading conductor (6) with respect to soil during the traversing step, wherein the leading lead when the inclined pressure receiving surface (65) is in a fixed posture is propelled. A propulsion method that learns from the measurement result of the degree of displacement of the position of the body (6), predicts a propulsion path in the levitation step based on the learning result, and determines the position of the second point (A2).