JP3054988U - Propulsion pipe with pipe end reinforcement ring - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a propulsion pipe that prevents damage to the end of a concrete pipe when performing propulsion work.
In particular, it is an object of the present invention to provide a propulsion pipe which is not damaged even when a large propulsion force or a partial pressure is applied to the pipe end, such as during long-distance propulsion or curved propulsion. [Structure] In the present invention, a plurality of divided reinforcing rings are arranged on the inner peripheral surfaces of the front and rear ends of a concrete propulsion pipe used in the propulsion method so as to be in contact with each other, and a joint between the reinforcing rings is adjusted with an adjusting bracket. This is a propulsion pipe having a pipe end reinforcing ring in which a reinforcing ring is fixedly extended.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a propulsion pipe that prevents damage to the concrete pipe end when performing propulsion work.In particular, a large propulsive force acts on the pipe end, such as during curvilinear or long-distance propulsion work. The purpose of the present invention is to provide a propulsion pipe for preventing the end of the pipe from being damaged.

[0002]

[Prior art]

 The propulsion work is a method in which the ground is excavated with an excavator at the tip of the excavator while pressing the rear end face of the propulsion pipe, and the tunnel is formed by embedding equipment installed in the starting shaft, and the propulsion pipe is buried. . The propulsion force for excavating the excavator and the propulsion pipe is the resistance of excavation and penetration at the tip and the frictional resistance between the propulsion pipe and the outer ground. The resistance at the tip is almost constant unless there is a change in soil quality, but the frictional resistance between the propulsion pipe and the outer ground increases in proportion to the increase in propulsion length. For this reason, since a large propulsive force gradually acts on the propulsion pipe, a concrete pipe having relatively large compressive force is generally used as the propulsion pipe.

[0003]

[Problems to be solved by the invention]

 Normally, in linear propulsion construction with a short propulsion length, only a small axial propulsion acts on the propulsion pipe, and the propulsion has sufficient margin against the axial permissible compression force of the propulsion pipe for safe and efficient operation. Good propulsion construction is performed.

[0004] However, due to problems such as construction pollution in urban areas in recent years, starting shafts constructed on roads are also subject to construction pollution. To reduce the number of starting shafts to be installed, long-distance curved propulsion construction is required. Although many plans are planned, the propulsion pipe is subject to a large propulsion force within the allowable compressive force of concrete in the axial direction. Cracks or breakage on the end face of the propulsion pipe. As a result, effective transmission of propulsion is not possible, so the propulsion work is interrupted to repair and reinforce cracks and damaged parts with high-strength cement or resin material each time. At present, it is not possible to take appropriate measures, causing damage at the same location again, delaying the propulsion period and increasing repair costs.

[0005] Therefore, the present invention provides a propulsion pipe that does not crack or break the pipe end face even when a large propulsive force or a partial pressure acts on the propulsion pipe during long-distance, curved propulsion construction. .

[0006]

[Means for Solving the Problems]

 In other words, in the present invention, a plurality of divided reinforcing rings are placed on the inner peripheral surfaces of the front and rear ends of the concrete propulsion pipe used for the propulsion method, and the joints between the reinforcing rings are expanded with adjusting brackets. This is a propulsion pipe having a pipe end reinforcing ring to which a reinforcing ring is fixed.

The reinforcing rings provided on the inner peripheral surfaces at both front and rear ends of the propulsion pipe are divided into a plurality according to the diameter of the propulsion pipe, and an inner peripheral plate along the inner peripheral surface of the pipe and longitudinal ribs provided on both sides of the inner peripheral plate. And a flange plate provided with holes at both ends of the reinforcing ring. Between the flange plates of each reinforcing ring, the reinforcing ring is extended by an adjusting metal fitting that fixes a bolt or the like that penetrates the hole with a nut, so that it is strongly fixed to the inner peripheral surface of the propulsion pipe. The reinforcing ring is made of a relatively strong steel material so as to sufficiently withstand uneven pressure.

[0008] The reinforcing ring installed in the curved section may be installed in the pipe when the propulsion pipe reaches a point just before the start of the planned curve, or may be installed in the starting shaft when the propulsion pipe is connected. It is more efficient to use the method of installation on the ground in advance, because the work in the pipe is in a bad working environment. In addition, the reinforcing ring installed for long-distance propulsion may be installed each time the propulsion pipe is connected. However, it is more efficient to use a method of previously installing the ring on the ground for the same reason as described above.

By the propulsion pipe having the pipe end reinforcement ring having the above-described structure, the reinforcement ring is extended on the inner peripheral surface of the concrete at both ends of the propulsion pipe, and acts against the centrifugal direction of the propulsion pipe body, thereby increasing the propulsion force. And the pressure can be sufficiently counteracted, and it is possible to prevent cracks and breakage of the pipe end face.

[0010]

【Example】

 Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a front view illustrating a propulsion pipe having a pipe end reinforcing ring according to the present invention. Before and after the propulsion pipe 9, the three-part reinforcing ring 1 is arranged so as to contact the inner peripheral surface of the propulsion pipe 9. The reinforcing ring 1 has an inner peripheral plate 3 in contact with the inner peripheral surface of the propulsion pipe 9, and vertical ribs 2 provided on both sides of the inner peripheral plate 3, and a flange plate 4 is provided at an end of each reinforcing ring 1. Is provided. At the joint portion of each reinforcing ring 1, an adjusting metal fitting 5 that can expand and contract the reinforcing ring 1 in the circumferential direction is installed and tied.

FIG. 2 is a longitudinal sectional view illustrating a propulsion pipe having a pipe end reinforcing ring. The reinforcing ring 1 is installed on the inner peripheral surface before and after the propulsion pipe 9. The reinforcing ring 1 strongly presses the concrete surface of the propulsion pipe 9 by the adjustment fitting 5 provided on each flange plate 4.

FIG. 3 is an explanatory view showing the adjustment fitting of the present invention in detail. The adjustment fitting 5 has a structure in which nuts 7 and 8 are inserted in front and rear of the flange plate 4 by passing bolts 6 through holes provided in the flange plate 4 of the reinforcing ring 1. As a method of installing the adjusting bracket 4, two nuts 7 are fitted into the center of the bolt 6, the bolts 6 are inserted into both holes, and the nut 8 is fitted from the reinforcing ring 1 side and fixed. In order to fix the reinforcing ring 1 to the propulsion pipe 9, the gap between the reinforcing rings 1 is widened by tightening the nut 7 attached inside to the outside, and the inner peripheral plate 3 of the reinforcing ring 1 is formed. It is firmly fixed to the inner peripheral surface of the propulsion pipe 9.

The reinforcing ring 1 is made of a relatively strong steel material so as to withstand a large propulsive force and a bias. The hole provided in the flange plate 4 of the reinforcing ring 1 may be a single hole or a plurality of holes depending on the diameter of the propulsion pipe 9.

Due to the expansion of the reinforcing rings 1 provided at the front and rear ends of the propulsion tube 9, a counterforce acts on the end face of the propulsion tube 9 in the centrifugal direction, and a large propulsion force during long-distance propulsion and a bias during curvilinear propulsion. Can handle pressure.

[0015]

[Effect of the invention]

 As described above, the propulsion pipe having the simple reinforcing ring of the present invention enables a uniform counterforce to be generated in the centrifugal direction on the front and rear end faces of the propulsion pipe in advance, and can be used for long distance propulsion and curve propulsion. It can cope with large propulsion force and uneven pressure, and does not cause cracks or breakage on the simple surface as in the past, so that safe and efficient propulsion construction can be performed. Large alternating magnetic field generated by insulated wire

[0016]

[Brief description of the drawings]

FIG. 1 is a front view illustrating a propulsion pipe having a pipe end reinforcing ring according to the present invention.

FIG. 2 is a longitudinal sectional view illustrating a propulsion pipe having a pipe end reinforcing ring.

FIG. 3 is an explanatory view showing the adjustment fitting of the present invention in detail.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reinforcement ring 2 Vertical rib 3 Inner peripheral plate 4 Flange plate 5 Adjustment bracket 6 Bolt 7 Inner nut 8 Outer nut 9 Propulsion pipe 10 Steel collar

Claims (1)

[Utility model registration claims] In a concrete propulsion pipe used for a propulsion method, a plurality of divided reinforcing rings are arranged to abut on inner peripheral surfaces at both front and rear ends of the propulsion pipe, and a joint between the reinforcing rings is formed. A propulsion pipe having a pipe end reinforcement ring, wherein the reinforcement ring is fixedly installed by expanding with an adjustment fitting.