JP2007303076A - Small-bore pipe excavating apparatus and excavating system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-bore pipe excavating apparatus which dispenses with provision of an expensive excavator, avoids increase in construction cost, minimizes installation of shafts, and implements propulsion of a small-bore pipe over a long distance inclusive of linear propulsion and curved propulsion, and to provide a small-bore pipe excavating system. <P>SOLUTION: The small-bore pipe excavating apparatus (B) is formed of a front cylinder portion (B1) which is rigidly connected to a rear end of an excavator (A) dedicated to small-bore pipe linear/short-distance excavation, and a rear cylinder portion (B2) which is arranged on a rear end of the front cylinder portion and connected to a propelling pipe or a tentative pipe (C). The small-bore pipe excavating apparatus (B) has a mechanism which functions to three-dimensionally move the front cylinder portion (B1) and the rear cylinder portion (B2) with respect to each other via a curvature crating jack portion (B3). The rear cylinder potion (B2) has mounted therein a magnetic line generating device (B4) and a level measuring device (H), and has arranged therein a directional change measuring device. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a small-diameter pipe excavation apparatus and an excavation system. In more detail, the present invention is a straight and short-distance excavator (hereinafter referred to as a small-diameter pipe straight line) in the high-load-resistant muddy water method of the small-diameter pipe propulsion method, which is the standard construction method by the Ministry of Land, Infrastructure, Transport and Tourism.・ Short-distance excavation machine) This is a device that enables curve construction without remodeling, can realize very inexpensive construction, and contributes to society.

  Development of technology that can construct a lifeline such as sewers and power lines at low cost is indispensable to contribute to society.

  In general, the lifeline is buried in the road, so when the road cannot be excavated, the shield method or the propulsion method is adopted. At present, the lifeline has shifted from large cities to small and medium cities, and the required cross-section has become smaller. Therefore, construction of small-diameter pipes with a diameter of less than 800 mm, which is not possible for humans to work in the pipe, has become the main component.

  However, shafts are generally required for propulsion work, but in recent years, due to environmental problems such as traffic congestion and vibration and noise, construction methods that enable long-distance propulsion and curved construction are possible as a technology to reduce shafts. The development of the construction method to do was desired. It is very difficult to solve such a problem in the small diameter pipe propulsion work.

  This is because it is possible to measure by a person with a pipe diameter of 800 mm or more that allows a person to enter the mine, but in a small-diameter pipe with a diameter of less than 800 mm that a person cannot enter, the installation of a shaft is reduced. This is because it is a very big problem to carry out the propulsion work according to a predetermined plan by surveying without human intervention. In particular, in order to realize curve construction, a method capable of surveying at the time of curve is indispensable.

  Several methods are known for surveying methods that do not depend on the person promoting the small-diameter pipe. For example, there are the laser method illustrated in FIG. 10 and the magnetic force line method illustrated in FIG. In the case of the laser method, a laser target is installed in a small-diameter straight-line / short-distance excavator to perform surveying using laser light. However, this laser method is not suitable for surveying for curve construction because of the straightness of the laser beam.

  On the other hand, in the method using magnetic lines, a magnetic line generator is mounted on the excavator and the position of the excavator is measured on the ground with the magnetic line detector (Patent Document 1-2). Since the linearity is not necessarily limited as in the system using laser light, it has applicability to curve construction.

  However, in order to actually construct a curve by adopting the surveying and measuring method using the magnetic lines of force, not only a magnetic line generator is installed, but also equipment such as a curve-building jack is required, and an expensive excavator is newly added. At present, it must be manufactured and the construction unit price is very high. Moreover, even if it is a case by a magnetic force line measurement system, the technique itself about the excavation system for implementing long-distance construction including curve construction is not established. No measures have been established to ensure or improve the accuracy of surveying itself, including combinations of equipment such as jacks for curved construction.

Therefore, if traffic congestion is not a problem, the shaft is constructed in a short interval with a small-diameter pipe propulsion method that is used for a short distance in a straight line that is economically advantageous. There are many cases. However, it has not yet been possible to achieve the promotion of long-distance small-diameter pipes by suppressing the increase in construction unit cost and suppressing the installation of shafts as much as possible without requiring the production of expensive excavators. It is a fact.
Japanese Patent Laid-Open No. 11-350875 JP 2003-240552 A

  From the background as described above, the present invention eliminates the conventional problems, does not require the production of expensive propulsion units, suppresses the increase in construction unit price, and further suppresses the installation of shafts as much as possible. At the same time, it is an object to provide a new technical means capable of realizing the promotion of a long-distance small-diameter pipe including curved construction.

  The present invention is characterized by the following in order to solve the above problems.

  The first cylinder portion includes a front cylinder portion connected and fixed to the rear end portion of the small-diameter pipe straight / short-distance excavator, and a rear cylinder portion connected to the propulsion pipe or the temporary pipe at the rear end portion. And a rear cylinder part having a mechanism that moves three-dimensionally by interposing a curve-forming jack part, and at least one of the front cylinder part and the rear cylinder part is equipped with a magnetic line generator, Small-diameter pipe digging device in which a direction change measuring device is arranged.

  Second: A small-diameter pipe digging apparatus in which a level measuring device is disposed in the front cylinder part or the rear cylinder part.

  Third: An adapter pipe is provided in the front tube, and it is possible to connect and fix to the front tube even if it is the same type of small diameter pipe straight line and short-distance excavator. A small-diameter pipe drilling device.

  Fourth: The curve-building jack portion connects the front tube portion and the rear tube portion, and is a small-diameter pipe digging device configured by a three-dimensionally movable hinge and one or a plurality of jacks. .

  Fifth: A device for digging small-diameter pipes in which a plurality of magnetic force line generators are mounted.

  Sixth: A device for measuring a change in direction is a jack stroke meter of a curve-building jack section, or a tilt meter and jack stroke meter, a magnetostrictive sensor, or a small diameter pipe digging device which is a registration mark.

  Seventh: At the connecting portion of the front tube portion and the rear tube portion via the curve forming jack portion, one is provided with a wrap portion to the other, and the wrap portion is provided with a seal packing. Equipment for caliber pipe digging.

  Eighth: A small-diameter pipe digging device in which a drain pump cylinder is provided in the rear cylinder.

  Ninth: Small-diameter pipe digging that enables long-distance digging including curved construction by connecting and fixing a small-diameter pipe straight / short-distance digging machine to the front tube portion of any of the above-mentioned small-diameter pipe digging devices system.

  As described above, the present invention has a very important sociality as a motivation for its creation. In other words, the present invention greatly reduces public investment, makes effective use of existing small-caliber straight-line and short-distance excavators that remain in the market without modification, and is very inexpensive and three-dimensional. It is the purpose of the invention that motivates the idea of realizing curved construction.

  The “small-diameter pipe straight / short-distance excavator” in the present invention is an existing excavator that has been widely used for the purpose of excavating small-diameter pipes with a diameter of less than 800 mm that cannot be entered by humans. In general, it is for straight construction that cannot be curved except by using a vertical shaft, and even if it is a straight line, it is generally less than 150 m, more practically less than 130 m. It means an excavator under the constraints.

  And of course, these mean the thing of the state which does not have the magnetic field generator which act | operates substantially.

  Further, in the present invention, the term “long distance” generally means that the distance is 130 m or more, and further 150 m or more.

  In order to attach a magnetic field generator or level measuring device to an existing small-diameter pipe straight / short-distance excavator, the outer peripheral part of the excavator is cut and the built-in equipment is moved to secure a space for accommodating the magnetic line generator. A large remodeling is required. In addition, in order to enable curve propulsion, a curve-building jack is newly attached, so that a large remodeling is required and the remodeling cost is high as in the case of mounting the magnetic field generator.

  Moreover, curve digging is difficult only by providing such a magnetic field generator, level measuring device, and jack. This is because the means for measuring the position and direction associated with the curve excavation must be considered.

  On the other hand, according to the present invention as described above, public investment is greatly reduced, and the existing small-diameter pipe straight / short-distance excavator remaining in the market can be effectively used without modification, It is possible to realize the promotion of long-distance small-diameter pipes including straight-line construction and curved construction, while suppressing the increase in construction unit price and minimizing the installation of vertical shafts as much as possible without requiring the production of expensive excavators. .

  The present invention has the features as described above, and an embodiment thereof will be described below.

  For example, as illustrated in FIG. 1, in the small-diameter pipe excavation apparatus (B) of the present invention, the small-diameter pipe linear / short-distance excavator (A) is connected and fixed to the rear end portion. A front tube portion (B1a) having an adapter tube (B1a) and the like, and a rear tube portion (B2) connected to a propulsion tube or a temporary tube (C) at the rear end thereof, It has a mechanism that allows the rear cylinder part (B2) to move three-dimensionally by the interposition of the curve forming jack part (B3), and the magnetic field line generator (B4) is mounted on the rear cylinder part (B2). Yes.

  The adapter tube (B1a) provided in the front tube (B1) absorbs the difference in the model of the rear end connection surface of the small-diameter straight-line and short-distance excavator (A) and has the same tube diameter. For example, even a small-diameter pipe straight / short-distance excavator (A) of a different type can be connected and fixed to the front tube portion (B1) of the small-diameter pipe excavation device (B) of the present invention.

  In this embodiment, a level measuring device (H) is also mounted.

  In addition, in the example of FIG. 1, although the rear cylinder part (B2) has the pump cylinder (B5) for drainage, this thing is not necessarily essential. However, it is desirable to provide this pump cylinder (B5) for drainage at a long distance of 100 m or more, for example, 120 m, 130 m, or the like.

  In the small-diameter pipe excavation apparatus of the present invention, for example, as described in the above embodiment, the conventional small-diameter pipe straight / short-distance excavator is not modified, and the small-diameter pipe straight / short-distance excavator is followed. In addition to mounting the curve-building jack part (B3), a magnetic field line generator (B4) level measuring device (H) is mounted to enable curve propulsion work.

  In the apparatus of the present invention, for example, the curve-building jack portion (B3) is arranged in front so that it can cope with a two-dimensional curve digging and a three-dimensional three-dimensional curve digging. It comprises a hinge (B3a) capable of three-dimensional movement and one or a plurality of jacks (B3b) that connect the tube portion (B1) and the rear tube portion (B2).

  For example, in the embodiment of FIG. 2 exemplifying a normal cross section, a flat cross section, and a side cross section, the curve building jack portion (B3) is constituted by the hinge (B3a) and the two jacks (B3b). According to the jack part (B3) of this configuration, as shown in FIG. 3, the three-dimensional movement of the vertical folding in the vertical direction and the horizontal folding in the horizontal direction is possible by the expansion and contraction operation of the two jacks (B3b). It is said. As a result, a three-dimensional excavation is realized.

  The configuration of the jack portion (B3) may be further provided with a hinge (B3a) and two jacks (B3b) as shown in FIG. 4, or as shown in FIGS. 5 (a) and 5 (b). Three jacks (B3b) may be arranged in the box. And various embodiments may be considered without being limited to these examples.

  On the other hand, the magnetic force generator (B4) is for making it possible to detect and measure the magnetic force lines generated from the magnetic force generator (B4) with a magnetic field line detector on the ground. This detection system uses the principle that when a magnetic field line passes through a coil of the magnetic field line detection device, an electromotive force is generated there, and a variation in induced voltage is detected.

  In the present invention, the magnetic field line generator (B4) using such a principle can measure the position of one of the front cylinder part (B1) or the rear cylinder part (B2), but the directionality is a past measurement point. In order to improve construction accuracy, as illustrated in FIG. 1, two or more are arranged before and after the apparatus of the present invention, and two or more points are detected by one measurement. It is considered that the device of the invention can accurately measure in what direction the planned line is to go.

  That is, as shown in FIG. 6 as a schematic plan view, when there are two or more magnetic force line generators (B4), the detection position becomes two or more points, and the detection position of the excavator (A) is connected by connecting the detection positions with a straight line. The direction can be accurately determined.

  In the apparatus of the present invention, the rear cylinder part (B2) is also provided with a direction change measuring device. When the magnetic field generator is directly attached to the excavator (A), the position can be directly measured. However, in the case of the present invention, the magnetic field generator (B4) attached to the small-diameter pipe digging device (B) of the present invention behind the excavator (A) is measured. This is because it is necessary to have a means for obtaining the position of

  As the measuring device for the direction change, for example, a jack stroke meter, an inclinometer and a jack stroke meter, a magnetostrictive sensor, or a dragonfly at a curve forming jack section (B3) can be used.

  The jack stroke meter can measure the expansion and contraction of the jack (B3b).

  For example, in the apparatus in which the curve forming jack portion (B3) is configured by the hinge (B3a) and the two jacks (B3b) illustrated in FIG. 2 and FIG. 3, a jack is provided for each of the two jacks (B3b). By mounting a stroke meter and further equipped with an inclined part, it is possible to measure a three-dimensional position and direction in three dimensions. FIGS. 7A and 7B illustrate this.

  As shown in the schematic plan view of FIG. 7 (a), the expansion / contraction of the two jacks (B3b) is measured with a jack stroke meter, and the center point of the middle folding point which is the reference point in the front tube portion (B1) is measured. The horizontal relative angle θ can be obtained. The horizontal relative position of the tip can be calculated from the angle θ and the trigonometric function of the length L from the half-turn point to the tip of the excavator (A). Then, as shown in FIG. 7 (b), the elevation of the rear cylinder part (B2) is measured by the liquid level elevation of the level reference tank and the level measuring device (H), and after that, the absolute value of the rear cylinder part (B2) is measured. The vertical altitude of the tip can be calculated by a trigonometric function based on the inclination angle ζ1, the length L1 from the level measuring device to the middle break point, the absolute tilt angle ζ2 of the excavator and the length L2 from the middle break point to the tip.

  In this way, the position of the excavator (A) can be calculated from the position of the magnetic field generator (B4), and the direction of excavation can be grasped.

  FIGS. 8A and 8B illustrate a case where a register mark (B7) is used as a mechanical measuring device. FIG. 8A shows how the register mark (B7) is seen when the front cylinder part (B1) and the rear cylinder part (B2) are in a straight line state. FIG. 8B shows how the register mark (B7) is seen in each of the state where the front tube portion (B1) faces upward and the state where it faces the right. The way the dragonfly (B7) is seen is shown as the orientation of the human eye and face in the drawing, but it goes without saying that it can be observed by appropriate imaging means or a scope. In this way, the direction of excavation is also grasped by the registration marks (B7).

  Furthermore, in the apparatus of the present invention, as illustrated in FIG. 1 and FIG. 9, as the function of preventing the entry of muddy water and water from the outside during excavation, the front cylinder part (B1) and the rear cylinder part (B2) The connecting part through the curve-forming jack part (B3) is provided with a wrap part (D) on one side and the seal part (E) on the wrap part (D). It can be. It goes without saying that the shape and structure of these wrap portions (D) and seal packing (E) may vary.

  For example, by using the propulsion device of the present invention as described above, and by constructing an excavation system that is connected to this and an existing small-diameter pipe linear / short-distance excavator, the above-described superiority is achieved. The effect will be played.

  Of course, the present invention is not limited to the above-described examples, and various forms of details are possible, and these are also included in the present invention.

It is a front sectional view which illustrated one embodiment of the device of the present invention. It is the front sectional view which showed the example of arrangement | positioning of a hinge and two jacks, a plane cross section, and a side sectional view. It is the figure which illustrated the three-dimensional movement in the example of arrangement | positioning of FIG. FIG. 3 is a front sectional view and a side sectional view showing an arrangement example different from FIG. 2. (A) and (b) are the front cross section and side sectional drawing which showed the example of arrangement | positioning of three jacks, respectively. It is the top view which showed the direction grasping of the excavation machine by several magnetic force generators. (A) (b) is the plane and front sectional view which showed the horizontal and vertical relative angle of the excavation machine tip by the stroke meter and inclinometer of two jacks. (A) and (b) are the outline figures which showed the register mark and its appearance. It is the front sectional view illustrated about the lap part and seal packing. It is the schematic which showed the survey and measurement by the conventional laser system. It is the schematic which showed the survey and measurement by a magnetic force line system.

Explanation of symbols

A Small-diameter pipe straight / short-distance excavator B Small-diameter pipe excavator B1 Front cylinder B1a Adapter pipe B2 Rear cylinder B3 Jack B3a Hinge B3b Jack B4 Magnetic force generator B5 Pump cylinder B6 Inclinometer B7 Dragonfly C Propulsion Pipe / Temporary pipe D Lapping part E Seal packing H Level measuring device

Claims (9)

  A front cylinder part and a rear cylinder are provided with a front cylinder part connected and fixed to the rear end part of the small-diameter pipe straight / short-distance excavator, and a rear cylinder part connected to the propulsion pipe or the temporary pipe at the rear end part. And at least one of the front cylinder part and the rear cylinder part is equipped with a magnetic force line generator, and the direction change A small-diameter pipe excavation device, characterized in that a measuring device is provided.   The apparatus for digging a small-diameter pipe according to claim 1, wherein a level measuring device is disposed in the front tube portion or the rear tube portion.   An adapter pipe is provided in the front tube, and it is possible to connect and fix to the front tube even if it is the same type of pipe diameter, even with different types of small-diameter straight-line and short-distance excavators. The apparatus for digging a small-diameter pipe according to claim 1 or 2.   The curve-building jack portion is composed of a hinge capable of three-dimensional movement and one or a plurality of jacks connecting the front tube portion and the rear tube portion. The small diameter pipe excavation device according to any one of 3.   The apparatus for digging a small-diameter pipe according to any one of claims 1 to 4, wherein a plurality of magnetic field line generators are mounted.   The small-diameter pipe according to any one of claims 1 to 5, wherein the direction change measuring device is a jack stroke meter, an inclinometer and a jack stroke meter, a magnetostrictive sensor, or a registration mark of a curve forming jack portion. Equipment for excavation.   One of the connecting portions of the front tube portion and the rear tube portion via the curve forming jack portion is provided with a wrap portion to the other, and a seal packing is provided on the wrap portion. The small-diameter pipe excavation device according to any one of claims 1 to 6.   The apparatus for digging a small diameter pipe according to any one of claims 1 to 7, wherein a pump cylinder for drainage is provided in the rear cylinder part.   A small-diameter pipe straight / short-distance excavator is connected and fixed to the front tube portion of the small-diameter pipe excavation device according to any one of claims 1 to 8 to enable long-distance excavation including curved construction. Pipe excavation system.

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