JP4152935B2 - Reconstruction method and equipment for existing pipes - Google Patents

Description

  The present invention relates to a reconstruction technique based on a propulsion method for reconstructing a pipeline associated with aging of an existing pipe.

The conventional remodeling method is generally based on the premise of the pipe laying method by excavation, and the main purpose is crushing, removal or cutting of concrete pipes, etc., in sections where steel materials are not buried Pipe renewal method is being carried out. However, in a section buried by the pipe propulsion method, a collar made of steel or stainless steel is attached to the connection portion, so that there is a possibility that the work may be stopped when the existing pipe is dug or removed.
Japanese Patent Laid-Open No. 10-160044

  The problem to be solved by the present invention is to solve these conventional problems, cutting is possible even when encountering steel collars, injection sockets, etc. Provided is an existing pipe remodeling method and a remodeling apparatus that allow a pipe to be smoothly remodeled without being forced to stop rotating.

The configuration of the present invention that solves this problem is as follows.
1) Reconstruction method for existing pipes that replaces existing underground pipes made of concrete connected by metal connection members with new pipes, adjacent to the inner side of each existing manhole to be rebuilt A reachable shaft is installed, a free-cutting cutting machine equipped with a plurality of rotary blades is run from the starter shaft to the reach shaft, and the existing pipe and connecting member are cut at multiple points with a rotary blade. At the same time as cutting, the existing pipe space is filled with a filler to prevent damage to the existing pipe due to earth pressure, etc., and after the cutting machine is started from the start shaft, the start end of the existing pipe is shut off and While filling the existing pipe at the same time back and forth, the filling material fed from the reaching shaft through the cutting machine is injected into the existing pipe behind the shut-off and filled, and the existing pipe after filling is crushed with a propulsion excavator Excavator excavating existing pipes and fillers The replacement method of the existing pipe, which is replaced with a new pipe that is a propulsion pipe following the 2) The existing underground pipe made of concrete connected by a metal connecting member is replaced with a new pipe This is a method for reconstructing existing pipes to be replaced, where a start shaft and a reaching shaft are installed adjacent to the inside of each existing manhole to be reconstructed, and a movable cutting machine equipped with a plurality of rotary blades is provided from the start shaft. The existing pipe and connecting member are cut at multiple points with a rotary blade, and the existing pipe inner space is filled with filler at the same time to prevent damage to the existing pipe due to earth pressure, etc. However, the filling material is poorly mixed mortar, and the existing pipe after filling is crushed by a propulsion excavator and replaced with a new pipe which is a propulsion pipe following the excavator while excavating the existing pipe and filler. Reconstruction method for existing pipes , characterized by renovation 3) Cutting After starting the disconnecting machine from the starting shaft, the starting end of the existing pipe is shut off, and the filler fed from the reaching shaft through the cutting machine is shut off at the same time as the existing pipe is shut back and forth at the rear of the cutting machine. The existing pipe remodeling method as described in 2) above, which is injected and filled into the pipe 4) When there is a deposit in the existing pipe, after removing the deposit in the existing pipe, a cutting machine is run to cut it. The existing pipe remodeling method 5) according to any one of the above 1) to 3) 5) The existing pipe remodeling method 6 according to any one of the above 1) to 4), wherein the existing pipe and the connecting member are cut into four crosses. ) A plurality of rotary blades that cut in the pipe line direction are attached radially to the carriage that runs in the existing pipe, and a shut-off board that blocks the inside of the existing pipe in the front and rear is attached to the rearmost end position of the carriage. Filling to inject filling material into the existing pipe space behind Existing pipe remodeling device provided with material injection means and provided with air venting means for drawing air in the existing pipe behind the breaker board to the front of the breaker board) A plurality of rotary blades are attached along the cutting direction, and the cutting depth is stepwise 6) or 7) provided with a cutting water injection means for injecting cutting water toward the cutting portion in front of the rotary blade. 9) The existing pipe remodeling device 9) described above, wherein the wheel and the rotary blade of the carriage are attached so as to be able to advance and retract in the inner diameter direction of the existing pipe so as to cope with the difference in the inner diameter of the existing pipe. Located in existing pipe renovation equipment.

  According to the present invention, since the existing pipe and the metal connecting member are cut in advance by a cutting machine before excavation, the existing pipe and the connecting member cut at the time of excavation are separated, and the excavation is smoothly performed without hindering the propulsion. New pipes can be embedded.

  The cutting machine according to the present invention has a structure in which a plurality of rotary blades are radially attached to a cart that is towed or self-running by a winch or the like of a reach shaft, and the existing pipe inside the rear of the cart is installed at the rearmost end of the cart. A shut-off board equipped with a packing that shuts off in a watertight state is installed, and a filler injection means for injecting filler into the back of the shut-off board and an air vent means for drawing the air behind the seal board to the front of the seal board are provided. Prevent ground collapse.

  A plurality of rotary blades having different diameters along the cutting direction are provided, and the cutting depth is gradually increased step by step so that the load can be reduced. In front of the rotary blade, cutting water jetting means for supplying cutting water with high water pressure is provided to reduce cooling and dust during cutting. The wheels and rotary blades of the carriage are attached so as to be able to advance and retract in the inner diameter direction of the existing pipe so that they can be adjusted according to the inner diameter of the existing pipe. Embodiments of the present invention will be specifically described below with reference to the drawings.

  1 is an explanatory view of a cutting machine according to the embodiment, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, FIG. 3 is a cross-sectional view taken along the line BB in FIG. Is an explanatory view of the rotary blade of the embodiment, FIG. 6 is an explanatory view showing cleaning of the existing pipe of the embodiment, FIG. 7 is an explanatory view showing installation of the start shaft of the embodiment, and FIG. 8 is a cut of the existing pipe of the embodiment FIG. 9 is an explanatory view showing excavation of the existing pipe of the embodiment, FIG. 10 is an explanatory view showing injection of the backfilling material and finishing of the joint, and FIG. 11 is an embodiment of the embodiment. FIG. 12 is an explanatory view showing backfilling of the embodiment.

  As shown in FIGS. 1 to 5, the cutting machine 1 used in the remodeling method of the present embodiment has a plurality of rotary blades 6 radially attached to a carriage 2 that is pulled and run by a winch, and a carriage is attached to the rearmost end of the carriage 2. 2 A shut-off plate 10 for shutting off the inside of the existing existing pipe T in a watertight state is attached, and a filler injection means for injecting the filler M is provided behind the shut-off plate 10 so that the air behind the shut-off plate 10 is forward of the shut-off plate 10. Air venting means for venting is provided.

  The carriage 2 has wheels 5 attached to the outer periphery of a cylindrical base body 3 via an advancing / retreating device 4 that advances and retreats in a pantograph shape by a cylinder 4a, and a plurality of the carriages 2 are connected according to the length of the existing pipe T. The advancing / retreating devices 4 are alternately arranged vertically and horizontally for each of the carts 2 to be coupled, and the rotary blade 6 and the barrier 10 are attached to the cart 2 coupled to the rearmost.

  The rotary blade 6 is formed of a diamond cutter, and includes a small rotary blade 6a for primary cutting and a large rotary blade 6b for secondary cutting, and four sets are cross-shaped per cart 2 via a rotatable leg member 7. It is attached to. The large rotary blade 6b can adjust the cutting depth according to the thickness of the existing pipe T by the cutting depth adjusting jack 8. In addition, a jet hose 9 that discharges high-pressure cutting water is attached in front of the rotary blade 6 so that the rotary blade 6 and the cutting portion can be cooled and dust can be suppressed. 6c is a motor.

  The blocking board 10 is slightly smaller in diameter than the inner diameter of the existing pipe T, and an air-type packing 11 that can be expanded and contracted is attached to the outer peripheral edge so as to be in close contact with the inner surface of the existing pipe T. The filler injection means draws the hose 12 disposed through the base body 3 of the carriage 2 from the tail to the rear surface side of the shut-off panel 10 so that the filler M supplied from the reach shaft side can be injected in parallel with cutting. . In addition, an electric air venting device 13 that vents air behind the front is attached to the barrier 10.

  In this embodiment, the existing pipe T is first cleaned as a preparation work (see FIG. 6). In the figure, 14 is a waste storage tank, 15 is a soil discharge container tank, 15a is a suction pipe, 16 is a mud suction device, 17 is a jet hose, B is sediment, G is ground, and H is an existing manhole. . In the existing pipe T, sediment B such as sedimentary soil and sewage is present. High-pressure water is sprayed on the sediment B in the existing pipe T by the jet hose 17 and suction is performed by the suction force of the mud-suction machine 16. It collect | recovers to the waste soil storage tank 14 through the pipe 15a.

  Next, a shaft installation work is performed as a primary process (see FIG. 7). In the figure, 18 is a backhoe (or clamshell), 19 is an excavated earth and sand transport vehicle, K1 is a start shaft, and Ga is earth and sand. The primary process depends on the pipe diameter inside one span of the existing manhole H, but in the case of φ800 mm class, a shaft with a start L = 4000 × W = 2500 and a reaching φ2500 mm is installed. Basically, it is a deep foundation method, but depending on the construction conditions, a rocking pit is excavated to the top of the old pipe, and the following steps are lowered by the deep foundation method. The ground surface will be covered with a cover plate.

  Next, an old pipe cutting work is performed as a secondary process (see FIG. 8). In the figure, 20 is a winch, 20a is a wire, and K2 is a reaching shaft. The secondary process is an operation of cutting the upper, lower, left and right of the existing pipe T into a plurality of pieces from the start shaft K1. First, the wire 20a is installed over the start and end in the existing pipe T, and other air hoses, hydraulic hoses, power lines, internal mortar injection hoses, jet high-pressure hoses, illumination lines, etc. (not shown) are drawn into the pipes at the same time. A winch 20 is installed at K2.

  In the start shaft K1, the cutting machine 1 is assembled and each wiring and pipe are connected and arranged at the start end of the existing pipe T. The cutting water is spouted from the jet hose 9 and the rotary blade 6 is rotated to cut the cutting depth to a predetermined depth. The adjustment cylinder 8 is extended, the wire 20a is tensioned by the winch 20, and the cutting machine 1 is run while being wound by the winch 20 according to the cutting state. The rotary blade 6 is first cut to the middle with the small rotary blade 6a and then gradually cut to the required depth with the large rotary blade 6b, so that the cutting is smoothly performed without load.

  After the existing pipe T can be divided and cut to some extent, the packing 11 of the barrier 10 is expanded, and the filler M is injected into the existing pipe T after being cut by the hose 12 while the air venting device 13 is venting the air. At this time, a gutter lid provided with an air vent valve is installed at the start end of the existing pipe T in the start shaft K1 to form a wife frame (not shown). The cutting and pouring steps are performed in parallel up to the reaching shaft K2. The filling material M is injected in order to prevent breakage of the entire tube, inflow of ground, and groundwater due to cutting of the existing tube T.

  Next, a new pipe propulsion work is performed as a tertiary process (see FIG. 9). In the figure, 21 is an excavator, 22 is a push jack, 23 is a bearing wall, 24 is a starting frame, and S is a new pipe. The excavator 21 is a propulsion type and uses a general crushing type, and excavates assuming that the existing pipe T filled with the filler M is a simulated bedrock. The excavator 21 takes in the crushed pieces and the filler M of the existing pipe T while excavating them and removes them to the rear, and the new pipe S is sequentially replaced by the existing pipe T following the excavator 21.

  Next, backfilling and pipe jointing are performed as a quaternary process (see FIGS. 10A and 10B). In the figure, 25 is an injection cock, and 26 is a backfill material. Next, pipe connection work is performed as a fifth step (see FIG. 11). In the fifth step, after completion of the propulsion, the pipe is idly pushed at the reaching shaft K2 and connected to the existing manhole H. At the start pit K1, pipes are laid from the outside of the pit to make all pipe concrete. Finally, shaft restoration work is performed as the sixth step (see FIG. 12). In the figure, 27 is a tire roller, and 28 is a vibration roller. In the sixth step, the shaft will be backfilled after cleaning the pipe, and the road surface will be restored.

  INDUSTRIAL APPLICABILITY The existing pipe remodeling method and the remodeling apparatus of the present invention are useful for reconstructing a pipeline that has a steel collar, an injection socket, and the like and cannot be easily crushed by an excavator.

It is explanatory drawing of the cutting machine of an Example. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is explanatory drawing of the rotary blade of an Example. It is explanatory drawing which shows the washing | cleaning of the existing pipe | tube of an Example. It is explanatory drawing which shows installation of the starting shaft of an Example. It is explanatory drawing which shows the cutting of the existing pipe | tube of an Example, and filling with a filler. It is explanatory drawing which shows excavation of the existing pipe | tube of an Example. It is explanatory drawing which shows injection | pouring of the backfill material of an Example, and finishing of a joint. It is explanatory drawing which shows embedding of the new pipe | tube of an Example. It is explanatory drawing which shows the backfill of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting machine 2 Carriage 3 Base body 4 Advance / Retreat device 4a Cylinder 5 Wheel 6 Rotating blade 6a Small rotating blade 6b Large rotating blade 6c Motor 7 Leg member 8 Cutting depth adjustment jack 9 Jet hose 10 Shutter 11 Packing 12 Hose 13 Air venting device 14 Exhaust Soil storage tank 15 Soil disposal container tank 15a Suction pipe 16 Suction suction device 17 Jet hose 18 Backhoe 19 Excavation soil transporter 20 Winch 20a Wire 21 Excavator 22 Former push jack 23 Bearing wall 24 Start stand 25 Injection cock 26 Back Filling material 27 Tire roller 28 Vibrating roller B Precipitate G Ground G Earth and sand H Existing manhole K1 Starting shaft K2 Reaching shaft M Filling material S New tube T Existing tube

Claims (9)

This is a method of remodeling existing pipes that replaces existing underground pipes made of concrete connected by metal connecting members with new pipes, and is located adjacent to the inner side of each existing manhole to be renovated. A traveling cutting machine equipped with a plurality of rotary blades is run in the existing pipe from the start shaft to the arrival shaft, and the existing pipe and connection member are cut at multiple locations with the rotary blade, and the existing cut Filling the space inside the pipe with the filler at the same time prevents damage to the existing pipe due to earth pressure, etc., starts the cutting machine from the start shaft, shuts off the start end of the existing pipe, and then installs the existing pipe behind the cutting machine. At the same time, the filling material fed from the reach shaft through the cutting machine is injected into the existing pipe behind the cutoff and filled, and the existing pipe after filling is crushed with a propulsion excavator and the existing pipe And to the excavator while digging the filler Characterized by renovations by substituting the new pipe is a propulsion tube, renovation method of the existing pipe. This is a method of remodeling existing pipes that replaces existing underground pipes made of concrete connected by metal connecting members with new pipes, and is located adjacent to the inner side of each existing manhole to be renovated. A traveling cutting machine equipped with a plurality of rotary blades is run in the existing pipe from the start shaft to the arrival shaft, and the existing pipe and connection member are cut at multiple locations with the rotary blade, and the existing cut The pipe is filled with a filler at the same time as cutting to prevent damage to the existing pipe due to earth pressure, etc., the filler is poorly mixed mortar, and the existing pipe after filling is crushed with a propulsion excavator. And remodeling the existing pipe , replacing the new pipe, which is a propulsion pipe following the excavator, while excavating the filler . After the cutting machine is started from the starting shaft, the starting end of the existing pipe is shut off, and the filler fed from the reaching shaft through the cutting machine is cut off at the same time as the cutting pipe is cut back and forth at the rear of the cutting machine. The method for remodeling an existing pipe according to claim 2 , wherein the pipe is filled by being injected into the pipe. The method for reconstructing an existing pipe according to any one of claims 1 to 3 , wherein when there is a deposit in the existing pipe, the cutting is carried out after the deposit in the existing pipe is removed and then cut . The existing pipe and connecting member according to any one of claims 1 to 4, wherein the existing pipe and the connecting member are cut in four crosses .   A plurality of rotary blades that cut in the pipeline direction are radially attached to a dolly that runs in the existing pipe, and a breaker that blocks the inside of the existing pipe back and forth is installed at the rearmost end position of the dolly at the rear of the rotary blade. An existing pipe remodeling device provided with filler injection means for injecting filler into the existing pipe inner space, and provided with air venting means for drawing the air in the existing pipe behind the shut-off panel to the front of the shut-off board.   7. The existing pipe remodeling apparatus according to claim 6, wherein a plurality of rotary blades are attached along the cutting direction, and the cutting depth is gradually increased stepwise to reduce the load.   The existing pipe remodeling device according to claim 6 or 7, further comprising a cutting water jetting unit that jets cutting water toward a cutting portion in front of the rotary blade.   The existing pipe remodeling device according to any one of claims 6 to 8, wherein a wheel and a rotary blade of the carriage are attached so as to be movable forward and backward in an inner diameter direction of the existing pipe so as to cope with a difference in inner diameter of the existing pipe.

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