JPH09287949A - Device and method for automatic survey in jacking method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the automatic survey of the level position of a leading body or a buried pipe simply and accurately in a long elongating jacking method or in a curve driving construction method. SOLUTION: A rotary irradiation means 1 has a laser irradiator 2, which irradiates laser light 4 in the horizontal plane, and a rotating-irradiation-means holding device 3, which holds the horizontal attitude of the rotating irradiation means 2. Light-receiving parts 5, which are provided as a pair before and after the rotary irradiation means 1, have vertical sliding means 6, which slide the light-receiving parts 5 in the vertical direction, light-receiving-part holding means 7, which hold the horizontal attitude of the light receiving-parts 5, and height measuring means 8, which measure the sliding height when the laser light emitted from the rotating irradiation means 1 is received. An information transmitting means transmits the information of the sliding height obtained from each light-receiving part 5 to the outside. Operation is made from the information, and the level positions of a leading body 9 and a buried pipe 10 are automatically surveyed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic surveying apparatus and an automatic surveying method in a propulsion method, and more particularly to laying a buried pipe by propelling a lead conductor and a buried pipe sequentially connected behind it to the ground. The present invention relates to an apparatus and a method for automatically measuring the level position of a leading conductor or a buried pipe by a propulsion method.

[0002]

2. Description of the Related Art The propulsion method is a method in which a front conductor having an excavation mechanism and a buried pipe sequentially connected to the rear of the front conductor are propelled and buried from the side of a shaft excavated from the surface of the earth. is there. Regarding the laying position of the buried pipe for propulsion burying, the horizontal and vertical positions are decided beforehand by the design document, and the laying according to the design document is a condition. Therefore, in order to lay a buried pipe according to the designed laying route, it is necessary to accurately know the positions of the lead conductor and the buried pipe even during the construction of the propulsion method, and change the position of the lead conductor as necessary. .

[0003] In particular, in the sewerage pipes that naturally flow down, the slope of the pipes to be propulsion buried becomes important. Therefore, during construction of the propulsion method, it is very important to carry out level surveying to regularly measure whether the vertical position of the buried pipe matches the design value exactly.

Therefore, as a method of measuring the vertical position of the leading conductor or the buried pipe during the construction of the propulsion method, the inner wall height of each buried pipe or the leading conductor is directly measured by an optical instrument such as a level device. The vertical position of the buried pipe and the conductor that were laid down was required. In addition, recently, an optical device for irradiating a laser beam has been developed. By installing the optical device in a vertical shaft, irradiating a laser beam to a target plate arranged on a front conductor, and tracking a laser spot position of the target plate. , A method of simultaneously measuring the vertical and horizontal positions of the lead conductor is adopted.

[0005]

The surveying method of irradiating the laser beam described above is effective when propelling the lead conductor and the buried pipe in the linear direction. However, in the propulsion method,
In recent years, in addition to straight line propulsion construction, curve propulsion construction is often adopted in which the conductor and buried pipe are laid in a curved shape. The survey method using light cannot be applied.

For this reason, an optical instrument such as a level device is installed in the starting shaft to measure the level up to the inner wall surface of the buried pipe where the visibility is clear. It is installed in the buried pipe, and the normal surveying method is used in which the level survey is carried out sequentially from the inner wall surface of the buried pipe that was surveyed earlier.

In the level surveying method described above, level surveying for curved propulsion construction is possible, but if the propulsion extension becomes long or the diameter of the buried pipe becomes small, frequent surveying work will be performed inside the buried pipe where the scaffolding is poor. It is an unstable work and takes a long time. In addition, when the pipe diameter becomes smaller, the working environment in the pipe is further deteriorated, and the work becomes crouched and the worker spends a lot of time on the survey.

Therefore, the present invention provides a method for accurately and quickly measuring the vertical position of the lead conductor or the buried pipe in the propulsion method, especially the curved propulsion method.

[0009]

That is, the level automatic surveying apparatus in the propulsion method according to the present invention is configured such that the laser beam for optical surveying is rotated by a rotating irradiation unit for rotating the irradiation direction in a horizontal plane and the irradiated laser beam is rotated. It is provided with a pair of light receiving portions for receiving light in front of and behind the irradiation means, and height measuring means for measuring the sliding height when the laser light is received by the light receiving portion.
The rotary irradiation means has a rotary irradiation means holding device that holds a horizontal posture so that the laser light can always be rotationally irradiated in a horizontal plane. The light receiving unit also has a light receiving unit holding device that holds a horizontal posture with respect to the inclination of the buried pipe due to rolling. Further, the light receiving section has a vertical sliding means capable of sliding in the vertical direction to receive the laser light emitted from the rotating irradiation means. The height measuring means detects the height of the laser light emitted by the rotary irradiating means when the laser light is slid on the vertical sliding means and received by the light receiving section.

As the lead conductor and the buried pipe, the lead conductor and the buried pipe having a basic structure used in the ordinary propulsion method can be applied. As the precursor conductor, an excavator equipped with a mud pressure mechanism, a compaction mechanism or the like can be appropriately selected and used according to soil conditions, pipe diameter and the like. The buried pipe is appropriately selected according to the construction purpose, such as a concrete pipe, a steel pipe, a vinyl chloride pipe, and a synthetic resin pipe. Inside the buried pipe, depending on the model of the excavator, it is possible to arrange a mud discharge pipe, a pressure feed pipe, a power cable for operating the excavator, and the like.

The rotation irradiation means for irradiating the laser beam may be provided with a laser irradiation device, and the laser irradiation device may be rotated by rotation driving means such as a driving machine. The irradiation direction of the laser light is rotated in the radial direction within the horizontal plane. The rotation of the irradiation direction is
It may be continuous rotation in one direction, or may be forward / reverse rotation.

The rotation irradiation means holding device may have a structure in which the rotation irradiation means is mounted on a horizontal plate having a plurality of adjusting screws. When the rotary irradiation means rolls, it is detected by an inclinometer or the like equipped in the rotary irradiation means, and the adjusting screw of the horizontal plate is controlled by a drive motor or the like to keep the rotary irradiation means horizontal.

The light receiving section has only to be capable of receiving and detecting the laser light emitted from the laser irradiator, and the structure of the light receiving section in a normal laser surveying device is adopted. The vertical sliding means for sliding the light receiving portion in the vertical direction to receive the horizontal laser light emitted from the rotary irradiation means may be a system of rotating and sliding by a ball screw system, a cylinder system or a crank system. Alternatively, a method of expanding and contracting with an eccentric cam method may be used.

The light receiving unit holding device can maintain the horizontal surface of the light receiving unit by using the same mechanism as the holding device of the rotating irradiation means.

As the height measuring means, if the height of the light receiving portion at that time when the laser light is received by the light receiving portion can be measured, a length measuring device in various mechanical devices can be adopted. Specifically, a device that can accurately measure the length with a stroke sensor or the like is used.

It is possible to provide an information transmitting means for transmitting information on the sliding height measured by the height measuring means to the outside. Information on the sliding height measured by the height measuring means of the automatic surveying equipment installed at the starting point inside the starting shaft and the front conductor is transferred to the rear shaft or on the ground by means of information transmission means such as electric cables and optical communication. Can be easily known based on the sliding height information.

When the propulsion extension is long or curved propulsion, the irradiation of the laser beam does not reach the leading conductor portion, so that it is necessary to arrange a plurality of automatic surveying devices. Multiple sets of light receiving parts are placed in the starting shaft, in the buried pipe, and in the front conductor, and the sliding height information transmitted from the plurality of sets of height measuring means is arithmetically processed to determine the position of the front conductor or the position of the buried pipe. If the calculation processing means for calculating is further provided, it is possible to know the level position from the base point in the starting shaft to the front buried pipe and the front conductor. A commonly used computer may be used as the arithmetic processing means.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a case where the automatic surveying device is applied to straight-line propulsion construction with long propulsion extension. The starting shaft 14 is excavated vertically from the ground surface. A buried pipe 10 and a front conductor 9 are propulsively buried in a horizontal direction from the side surface of the shaft 14.

At a predetermined position in the buried pipe 10, a rotary irradiation means 1 for irradiating the laser light 4 with a laser irradiation device 2 in a horizontal plane is installed. The rotary irradiation means 1 is attached to a rotary irradiation means holding device 3 having a horizontal plate supported by three adjusting screws. When the embedded pipe 10 is rolled and the rotary irradiation means 1 is tilted, it is detected by an inclinometer (not shown) equipped in the rotary irradiation means 1 and the like, and the adjusting screw of the horizontal plate is adjusted by a drive motor or the like. Hold horizontal.

A light receiving portion 5 having a light receiver for receiving the laser beam 4 emitted from the laser irradiator 2 of the rotary irradiating means 1 is installed in front of and behind the rotary irradiating means 1. The light receiving unit 5 installed at the rear is installed at the position of a predetermined height H _O from the reference point OP at the rear inside the starting shaft 14. The light receiving portion 5 installed in the front conductor 9 in the front is installed at a position H _{C at} a height from the buried pipe level control point. Each of the light receiving parts 5 is also attached to a light receiving part holding device 7 having a horizontal plate having a plurality of adjusting screws so that the light receiving parts 5 have a structure similar to that of the rotary irradiating means 1 and can hold horizontal with respect to the rolling. In order to receive the laser beam 4 emitted from the laser irradiator 2 of the rotary irradiator 1, each light receiving part 5 is provided with a vertical sliding means 6 which vertically slides by a ball screw method. Further, height measuring means 8 is installed in the light receiving unit 5 in order to measure the sliding height at which the laser light of the laser light 4 is received by the light receiving unit 5.

The communication irradiating means 1 and the light receiving section 5 are each provided with a communication control composite cable 1 via a relay unit 15.
It is connected to 1. The cable 11 supplies power to the rotary irradiation means 1 and the light receiving section 5, transmits a signal for controlling the operation, and transmits information on the detected sliding height. The cable 11 is connected to the personal computer 12 via the communication control unit installed on the ground through the starting shaft 14 and the survey information is processed by the personal computer.

Now, let H _{C be} the height of the light receiving portion 5 installed on the front conductor 9 from the buried pipe level control point, and let H _{1 be the} sliding height at which the laser light 4 is received by the rear reference light receiving portion 5. And the sliding height at the light receiving portion 5 in the front conductor 9 in front is measured as H ₂ , the height H _B from the reference point OP of the buried pipe level control point is expressed by the following equation. . H _B = H ₀ + H ₁ − (H _C + H ₂ ) These pieces of information are transmitted to the ground and processed by a personal computer, and displayed on a monitor as surveying information or printed out by a printer.

FIG. 2 shows a state in which the rotary irradiation means 1 installed in the buried pipe 10 is installed so as not to interfere with the mud pipe 16 that passes through the lower space of the buried pipe 10 side by side. As a method of attaching the rotating irradiation means 1, a method of fixing a mount made of steel or the like to the inner wall surface of the buried pipe 10 and installing it on the mount may be used.

FIG. 3 shows a method of height correction for the rolling of the front conductor 9. When the leading conductor 9 rolls, the light receiving portion 5 installed in the leading conductor 9 tilts, but is held horizontally by the light receiving portion holding device 7. Since the vertical height of the light receiving unit 5 changes due to the correction at this time, it is necessary to perform the correction by rolling in order to grasp the accurate level position of the leading conductor 9.

The initial setting angle of the light receiving section 5 installed in the front conductor 9 is θ ₀ , the radius of the buried pipe 10 is r, and the center of the front conductor 9 to the adjusting axis of the light receiving section holding device 7 of the light receiving section 5. Distance r
₀ and the roll angle measured by the inclinometer 13 is θ ₁ , the height H _C from the buried pipe level control point to the light receiving unit 5 is
Is corrected by the following equation. _{H C = r-r 0 ×} Cos (θ 0 -θ 1)

The embodiment shown in FIG. 4 shows a case where the method is applied to a curve propulsion method. In the starting shaft 14, the first rotary irradiation means 1 is installed at a position where it does not hinder the propulsion work. In the shaft 14 behind the first rotary irradiation means 1,
The light receiving unit 5 is installed at a position of a predetermined height. Inside the front buried tube 10, a light receiving section 5 is installed at a position where the laser light 4 can be seen through from the first rotating irradiation means 1. Further, in front of the above-mentioned light receiving unit 5, the second rotating irradiation means 1 is installed at a position where the above-mentioned light receiving unit 5 can be seen through and the light receiving unit 5 installed on the tip conductor 9 can be seen through.

The laser light 4 emitted from the first rotary irradiation means 1 is received by the rear light receiving portion 5 and the front light receiving portion 5, and the sliding heights H ₁ and H ₂ at the time of receiving the light are measured. . Then, the laser light 4 emitted from the second rotary irradiation means 1
The sliding heights H3 and H4 received by the rear light receiving unit 5 and the front light receiving unit 5 are measured. This information is input from the cable 11 to the personal computer 12 installed on the ground via each relay box 15 and processed.
The height H from the reference point OP of the buried pipe level control point at this time
_B is represented by the following equation. _{H B = H 0 + H 1} + (H 3 -H 2) - (H 4 + H C)

In this embodiment, the installation of the rotary irradiation means 1 has been described at two places. However, since the sight distance of the laser beam 4 changes depending on the diameter of the buried pipe, the radius of the curve, etc., it is examined in advance and the rotation is performed. The increase / decrease of the irradiation unit 1 and the light receiving unit 5 is determined.

FIG. 5 is an explanatory diagram showing the structure of the light receiving section 5 in detail. Below the light receiving portion 5, a light receiving portion holding device 7 having an adjusting screw is provided. In order to receive the laser beam 4 emitted from the rotary irradiation unit 1, a vertical sliding unit 6 that slides the light receiving unit 5 in the vertical direction is provided. In this embodiment, the ball screw method is adopted. As another method, a conventional technique such as a cylinder system can be adopted. Height measuring means 8 for measuring the sliding height when the laser beam 4 is received is provided on the top of the light receiving section 5. As a specific device, a stroke sensor or the like that can accurately measure the length is used.

[0030]

As described above, according to the automatic surveying apparatus of the present invention, the laser light rotatably irradiated in the horizontal plane is moved by vertically sliding the light receiving portions arranged in the front and the rear. By catching it, measuring its sliding height, and transmitting that information, it can be processed by a personal computer installed on the ground, allowing workers to enter the buried pipe and perform frequent surveying work as in the past. It is not necessary to do it, and it is possible to perform simple and accurate automatic leveling even in curved propulsion construction.

[0031]

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an automatic survey system for explaining an embodiment of the present invention in linear propulsion.

FIG. 2 is a cross-sectional view of rotary irradiation means installed in a buried pipe.

FIG. 3 is a cross-sectional view illustrating a method of correcting the height of the leading conductor with respect to rolling.

FIG. 4 is an overall configuration diagram of an automatic survey system for explaining an embodiment of the present invention in curve propulsion.

FIG. 5 is a front view illustrating the configuration of a light receiving unit in detail.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 rotation irradiation means 2 laser irradiation device 3 rotation irradiation means holding device 4 laser light 5 light receiving part-6 vertical sliding means 7 light receiving part holding device 8 height measuring means 9 leading conductor 10 buried pipe 11 cable 12 personal computer 13 inclinometer 14 Starting shaft 15 Relay unit OP Reference point H _B Height from the reference point OP from the buried pipe level control point H ₀ Predetermined height from the reference point OP of the light receiving part in the starting shaft H ₁ First rotation Sliding height H _{2 at which} the laser light of the irradiation means is received by the light receiving section in the rear shaft. Sliding height H _{2 at which} the laser light of the first rotating irradiation means is received by the light receiving section in the front conductor H ₃ Second Sliding height H _{4 at which} the laser light of the rotary irradiation means is received by the light receiving portion in the rear shaft, H ₄ Sliding height H _{C at} which the laser light of the second rotary irradiation means is received by the light receiving portion in the front conductor Buried pipe level control point Height of the light-receiving unit

Claims (3)

[Claims] 1. A device for automatically measuring the level positions of the lead conductor and the buried pipe by a propulsion method in which a lead conductor and a buried pipe sequentially connected behind the lead conductor are propelled into the ground to lay the buried pipe. A rotary irradiation means for irradiating the laser beam for optical surveying by rotating its irradiation direction in a horizontal plane, a rotary irradiation means holding device for holding the horizontal attitude of the rotary irradiation means, and the rotary irradiation means. A pair of light receiving portions for receiving the laser light emitted in the front and rear of the rotary irradiation means, a vertical sliding means for sliding the light receiving portions in the vertical direction, and a light receiving portion for maintaining the horizontal posture of the light receiving portions. An automatic surveying device comprising a part holding device and height measuring means for measuring a sliding height of the light receiving part. 2. Information transmission means for transmitting information on the sliding height measured by the height measuring means to the outside, and arithmetic processing for the information on the sliding height transmitted from a plurality of the automatic surveying devices. The automatic surveying device according to claim 1, further comprising arithmetic processing means for calculating the level positions of the leading conductor and the buried pipe. 3. A propulsion method for laying a buried pipe by propelling a lead conductor and a buried pipe successively connected to the rear of the lead conductor, and using the automatic surveying device according to claim 1 or 2. In the method of automatically measuring the level position of the lead conductor or the buried pipe, a step of arranging the automatic surveying device at intervals in the propelling direction of the lead conductor and the buried pipe propelled in the ground,
In one set of automatic surveying devices arranged in the propulsion direction, the horizontal laser light emitted from the rotating irradiation means of the automatic surveying device is received by one set before and behind the rotating irradiation means. Automatic measurement consisting of: a step of measuring the height of the front and rear light receiving sections at that time, and a step of obtaining the height difference between the front and rear light receiving sections from the information of the height of the light receiving section at that time. Method.