JP2006045864A - Propulsion equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide propulsion equipment eliminating weak points of a pipe joint unit and transmitting uniform propellent force to a propellant pipe in propulsion work of a very large aperture which joins split pipes. <P>SOLUTION: The propulsion equipment comprises a base provided below the propellant pipe into which the split pipes are integrated and having an ascending and descending means to be operated in the vertical direction and a pair of rollers provided in left and right positions symmetrical to a vertical shaft of the propellant pipe on the base. In addition the propulsion equipment comprises an annular pressing ring with almost the same inner and outer diameters as those of the propellant pipe which are disposed forwardly of a plurality of symmetrically arranged initial pushing jacks and a plurality of transmission jacks which are uniformly arranged forwardly of the pressing ring in the circumferential direction. A determined amount of oil is filled on the pressurized side of the respective transmission jacks and pressure ports of the respective transmission jacks are connected and sealed with a piping material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a propulsion facility for uniformly transmitting a propulsion force of a main jack to a propulsion pipe integrated with a division pipe in the propulsion method.

  In the propulsion method, a propulsion pipe manufactured in a factory is installed on a propulsion stand in a start shaft, and a plurality of original push jacks arranged symmetrically are installed behind the propulsion pipe. Generally, a method is adopted in which the propulsion force of the main push jack is evenly transmitted to the rear end face of the propulsion pipe through the push ring by installing an annular push ring between the front face of the main push jack and the rear end face of the propulsion pipe. ing. Propulsion pipes are often made of reinforced concrete and are transported from the factory to the site as finished products.

  The diameter of the propulsion pipe has a nominal diameter of φ3000 mm or less due to domestic road regulations, and propulsion pipes of φ3000 mm or more cannot be transported as an integrated product. However, in recent years, the demand for ultra-large diameter propulsion pipes as a countermeasure against rainwater has increased, and there is a method for producing and transporting a split pipe divided into two parts at the factory and joining the split pipes locally to integrate them. Has been developed. As a method of joining the two split pipes, the lower split pipe is installed on the propulsion stand in the start shaft, and then the upper split pipe is installed so as to cover the lower split pipe, and the joint is used as a shield segment. A method of connecting and integrating them using a connecting tool or the like, and a method of applying tension and prestressing a PC steel material in the circumferential direction to integrate them.

The integrated propulsion pipe has a shape with joints that are continuous on both sides due to the joining method described above, and is a weak point against shearing due to propulsive force, resulting in misalignment at the joints. There is. Also, the main push jack installed behind the propulsion pipe needs to be opened at the top to carry in and out the materials and equipment into the pipe. It arrange | positions so that two or more may contact | abut at a position. For this reason, the main pushing jack force acts on the joint portions on both side surfaces of the propulsion pipe, and there is a problem that the joint portion is displaced or damaged.
JP 2003-321996 A

  The problem to be solved is to provide a propulsion facility that eliminates the weak point of the joint portion of the propulsion pipe integrated with the divided pipe and that uniformly applies the propulsion force of the main push jack applied to the end face of the propulsion pipe.

The present invention relates to a propulsion equipment for uniformly transmitting propulsive force to a propulsion pipe integrated with a split pipe in a start shaft, and is provided with a lifting means installed below the propulsion pipe and operable in a vertical direction. And propulsion equipment comprising a pair of rollers installed on the gantry at left and right positions symmetrical to the vertical axis of the propulsion pipe.
In addition, in the propulsion equipment for evenly transmitting the propulsive force to the propulsion pipe with the split pipe integrated in the start shaft, the inner and outer sides are almost the same as the propulsion pipe in front of a plurality of symmetrically arranged main push jacks. It is composed of an annular push ring having a diameter and a plurality of transmission jacks arranged evenly in the circumferential direction in front of the push ring, and the pressure side of each transmission jack is filled with a predetermined amount of oil, The main feature is the propulsion equipment in which the pressure ports of the transmission jack are connected and sealed with piping materials.

  By using the propulsion equipment of the present invention, by rotating the propulsion pipe integrated with the dividing pipe to a predetermined angle, the joint portion of each pipe comes to a different position, and is weak against shear. Never become. Further, since the propulsive force transmitted from the main push jack is transmitted to the end face of the propulsion pipe through a plurality of transmission jacks arranged evenly in the circumferential direction, it becomes a leveled uniform low propulsive force. .

  In the propulsion construction of a propulsion pipe that integrates a split pipe with an ultra-large diameter, the propulsion equipment that distributes and acts evenly without concentrating the propulsion force of the main jack on the end face of the propulsion pipe has been realized.

  FIG. 1 is a cross-sectional view illustrating the propulsion equipment according to the first embodiment of the present invention. For assembling the divided pipes 2 and 3 divided into two, the lower divided pipe 2 is installed on the propulsion base 9 in the starting shaft, and both side surfaces are sandwiched and fixed by the ruler rail 8. PC steel material installed in the circumferential direction of the propulsion pipe by installing the upper split pipe 3 from the upper part of the lower split pipe 2 and connecting the joint with a connector used in a shield segment or the like The propulsion pipe 1 is assembled by a method of applying tension and prestressing and integrating them. Below the propulsion tube 1 is installed a gantry 5 provided with lifting means 7 movable in the vertical direction, and a pair of rollers 6 are placed on the gantry 5 at left and right positions symmetrical to the vertical axis of the propulsion tube 1. Is installed. On both side surfaces behind the propulsion pipe 1, a plurality of main push jacks 4 are arranged symmetrically enough to meet the required propulsive force assumed in advance. The main push jack 4 is fixed by being framed by a support frame, and is installed on the left and right ruler rails 8.

  The gantry 5 on which the rollers 6 are installed may be installed at one position at the center of gravity of the propulsion pipe 1 in the propulsion direction, or may be installed at two positions before and after the propulsion direction of the propulsion pipe. The roller 6 needs to have sufficient strength to withstand the weight of the propelling tube 1. As the lifting / lowering means 7 of the gantry 5, a hydraulic jack or a pressure jack that is usually used can be used. The jack must have the ability to lift the propulsion pipe 1 sufficiently, and has a stroke that allows the edge to be cut off from the propulsion base 9 and the ruler rail 8.

  FIG. 2 is a side view illustrating a gantry that is the propulsion equipment according to the first embodiment. Below the propulsion pipe 1, cradles 5 are installed at two locations before and after the propulsion direction. A pair of rollers 6 is installed on the gantry 5 with respect to the vertical axis of the propulsion pipe 1. The upper part of the gantry 5 is supported by a hydraulic jack or the like as the lifting means 7 and can be expanded and contracted in the vertical direction.

  Next, the usage situation of Example 1 of this invention is demonstrated. When joining of the divided pipes is completed on the propulsion base 9 in the start shaft, the lift means 7 of the base 5 is operated to raise the upper part of the base 5. As the pedestal 5 is raised, the top roller 6 comes into contact with the lower surface of the propulsion pipe 1 and lifts the propulsion pipe 1 from the propulsion base 9. When the edge is cut off from the propulsion table 9 and the ruler rail 8, the operation stops and the propulsion pipe 1 is rotated to a predetermined angle by human power or the like to move the joint position of the propulsion pipe 1 from the horizontal positions on both sides. At the time of the next propulsion pipe 1, it is reversely rotated so as not to be a continuous joint position. As described above, by alternately shifting the joint position of the propulsion pipe 1, there is no continuous joint, and there is no longer a weak point of shear due to the propulsive force.

  FIG. 3 is a side view illustrating the propulsion equipment according to the second embodiment of the present invention. In the front of the retaining wall behind the start shaft, a bearing wall 13 is constructed as a reaction force receiver for the main jack 4. At the front part of the bearing wall 13, a main push jack 4 that is aligned with the position of the end face of the propulsion pipe 1 is arranged symmetrically via a push angle 14 made of H steel or the like. Between the front surface of the main push jack 4 and the end surface of the propulsion tube 1, a cylindrical push wheel 10 having an inner diameter and an outer diameter substantially the same as the propulsion tube 1 is installed. A transmission ring 11 equipped with a plurality of transmission jacks 12 arranged evenly in the circumferential direction is installed on the front end face of the pusher wheel 10. Each transmission jack 11 is filled with about 1/2 oil on the pressure side, and each pressure port is connected and sealed with a piping material. When a plate plate is inserted between the transmission jack 12 and the end face of the propulsion tube 1 so that the bottom of the transmission jack 12 does not directly contact the end face of the pipe, an effective propulsive force can be transmitted.

  In the present embodiment, the push wheel 10 and the transmission ring 11 are disclosed as separate structures, but a structure in which the push wheel 10 is integrated with the push wheel 10 is also possible. The push ring 10 and the transmission ring 11 are made of a relatively strong steel material or the like because a large driving force of the original push jack acts.

  FIG. 4 is a front view for explaining the transmission ring. The transmission ring 11 is configured by arranging a plurality of transmission jacks 12 arranged at regular intervals in the circumferential direction of a flange having substantially the same wall thickness as the propulsion pipe 1. The pressure port of each transmission jack 12 is connected and sealed with a piping material (not shown). The transmission jacks 12 may be attached by using a generally used method of fixing the transmission jacks 12 to the flanges with bolts. In the structure in which the press wheel 10 and the transmission ring 11 are integrated, a method of fixing the head of the transmission jack 12 to the end surface of the press wheel 10 with a bolt or the like can be adopted. Since the transmission jack 12 is intended to transmit the propulsive force of the main pushing jack 4 evenly to the end surface of the propulsion pipe 1, the transmission jack 12 may have a large installation area, a short stroke, and a compact one.

  Next, the usage situation of Example 2 of this invention is demonstrated. When the joining of the propelling pipe 1 is completed, the main push jack 4 is extended to push the push wheel 10 forward. The push wheel 10 presses the front transmission ring 10, and the pressing force is transmitted to the transmission jack 12. Since each transmission jack 12 is filled with about 1/2 of oil on the pressure side and each pressure port is connected and sealed with piping material, the pusher wheel 1 biased to only a few transmission jacks 12 is temporarily provided. Even when force is applied, the hydraulic pressure of the several transmission jacks 12 is transmitted to the other transmission jacks 12 through the piping material, and the same pressing force is transmitted to the end face of the propulsion pipe 1. For this reason, an evenly distributed pressing force always acts on the entire end face of the propulsion pipe 1, and the propulsive force concentrated on one point of the joint portion does not act, so that safe and reliable propulsion can be performed. The

  By jointly using Example 1 and Example 2 of the present invention, the joint portion of the super-large-diameter propulsion pipe 1 does not come to a continuous position, but is alternately displaced. Further, the pressing force from the main pushing jack 4 that becomes a large propulsive force is evenly distributed via the transmission ring 11 and is transmitted to the end face of the propelling tube 1 as a relatively small force.

  In rebar concrete pipes with a diameter of over 3,000 mm that are manufactured separately and joined on site, the weak points for shearing of pipe joints are eliminated, and evenly distributed propulsive force is applied to the pipe end face to ensure safe propulsion work. Applicable to propulsion equipment that can be used.

It is a cross-sectional view explaining the propulsion equipment of Example 1 of the present invention. It is a side view explaining the mount frame which is propulsion equipment of Example 1. FIG. It is a side view explaining the propulsion equipment of Example 2 of the present invention. It is a front view explaining a transmission ring.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Propulsion pipe 2 Lower division pipe 3 Upper division pipe 4 Main pushing jack 5 Base 6 Roller 7 Lifting means 8 Ruler rail 9 Propulsion stand 10 Push ring 11 Transmission ring 12 Transmission jack 13 Bearing wall 14 Pushing angle

Claims (2)

  In a propulsion facility for uniformly transmitting propulsive force to a propulsion pipe in which a split pipe is integrated in a start shaft, a stand installed below the propulsion pipe and equipped with lifting means operable in a vertical direction; A propulsion facility comprising a pair of rollers installed at left and right positions symmetrical to the vertical axis of the propulsion pipe.   In the propulsion equipment to transmit the propulsive force evenly to the propulsion pipe that integrates the split pipe in the start shaft, the inner and outer diameters are almost the same as the propulsion pipe in front of the multiple main push jacks arranged symmetrically. Each of the transmission jacks is filled with a predetermined amount of oil, and the pressure side of each transmission jack is filled with a predetermined amount of oil. The propulsion equipment is characterized in that the pressure ports are connected and sealed with piping materials.

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