JP6472689B2 - Method and apparatus for transporting insoluble transport in ground improvement work or dredging work - Google Patents

Description

  The present invention relates to a method for transporting an insoluble transport object in ground improvement work or dredging work, and a transport device thereof, in which insoluble transport objects such as ground improvement material and drainage in ground improvement work and dredged soil in dredging work are transported by a transport pipe. About.

  Conventionally, in the ground improvement work, it is known to improve the ground using a high-pressure jet agitation method. This high-pressure jet agitation method inserts a tube rod into the ground and starts from the tip of the tube rod. Spray ground improvement materials such as cement milk. And while cutting the ground with the spray energy of this ground improvement material, the ground improvement material and ground sprayed are mixed and stirred, and this is done upward while pulling out the tube rod, improving consolidation in the ground It is designed to create a body.

  And as a plant for performing this high-pressure jet stirring method, as shown in FIG. 1, the construction machine 2 for inserting or pulling out the pipe rod 1 in the ground is provided. The construction machine 2 is a self-propelled small pile driver or a boring machine. As this construction machine 2, a mast 3 is erected, and a pipe rod 1 is vertically mounted along the mast 3, and an elevating device that inserts and pulls the pipe rod 1 into and out of the ground from the mast 3 A rotating device for rotating the tube rod 1 is provided. The pipe rod 1 is a hollow steel pipe through which cement milk, compressed air, or the like, which is a ground improvement material, passes inside, and a jet that injects cement milk, which is a ground improvement material, at the tip, which is the lower end thereof. Mouth is provided.

  In addition, a facility for supplying cement milk, which is a ground improvement material, to the pipe rod 1 attached to the construction machine 2 is provided around the construction machine 2. The equipment includes a cement silo 4 for storing cement raw materials, A cement generating device 5 is provided for generating cement milk, which is a ground improvement material, by flowing a cement raw material from the cement silo 4 and mixing it with water. A high-pressure pump 6 is provided on the downstream side, and a cylindrical conveying pipe 7 extending substantially in the lateral direction is provided. Cement milk is fed from the cement generating device 5 through the conveying pipe 7 to the pipe rod 1 by the high-pressure pump 6. To supply. In addition, although not shown in figure, it is equipped with apparatuses, such as a compressor and a generator for supplying compressed air.

  Moreover, in the pipe rod 1 of the construction machine 2, since the cement milk which is the ground improvement material is sprayed and the ground is mixed, the sprayed cement milk and the ground are mixed and stirred. The ground and cement milk are mixed and discharged from the ground around the tube rod 1 as mud. For this reason, around the pipe rod 1 of the construction machine 2, a waste mud receiving tank 10 is provided for collecting the mud discharged from the ground. Furthermore, a waste mud tank 11 capable of storing a large amount of waste mud is provided in a place where the nearby ground is strong and stable. And the cylindrical conveyance pipe 12 extended in the substantially horizontal direction connected from this waste mud receiving tank 10 to the waste mud tank 11 is provided, and this conveyance pipe 12 is provided with the pressure feed pump 13 in the base end of the upstream, This pressure feed The pump 13 transports the mud accumulated in the mud receiving tank 10 to the mud tank 11. Then, the mud collected in the mud tank 11 is carried out by the vacuum vehicle 14.

  In the ground improvement work using such a high-pressure jet agitation method, cement milk, which is a ground improvement material supplied to the pipe rod 1 from the cement generating device 5, or sprayed from the ground and accumulated in the waste mud receiving tank 10. As described above, the insoluble transported material such as waste mud is transported by the transport pipes 7 and 12 extending substantially in the lateral direction, and the ground is improved inside the transport pipes 7 and 12. An insoluble transport material such as cement milk or waste mud, which is a material, is put in, and the insoluble transport material is transported by a transport pipe.

  In such conventional methods for transporting insoluble transport materials such as cement milk or waste mud, which are ground improvement materials, cement silos, mixing and generating equipment, waste mud tanks, etc. should be installed in a place where the ground is strong and stable. For this reason, for example, the transport pipe connected here has a very long distance exceeding 100 m. For this reason, a plurality of transport pipes having a length of about 10 m are connected and used. It was.

  And, for example, in the transport pipe 12 that transports the waste mud that is an insoluble transport product, as shown in FIG. 2 (a), in the waste mud mixed with the ground and cement milk, a heavy specific gravity precipitates, As shown in FIG. 2 (b), it gradually accumulates in the inside of the conveying pipe 12 and solidifies here to block the conveying pipe 12, which sometimes makes it impossible to convey the mud. For this reason, when the transport pipe 12 is blocked and the waste mud cannot be transported, the work is temporarily interrupted, and all the transport pipes 12 are removed and solidified to remove the accumulated waste mud and washed. Or the work which replaces | exchanges for the new conveyance pipe | tube 12 came to be performed, and these work was sometimes performed several times a day.

  In this way, when performing ground improvement work, the work is interrupted several times a day, and after all the transport pipes have been removed, the work to clean the transport pipes, or to replace with a new transport pipe Therefore, there is a problem that the workability becomes very bad, and this increases the construction period and the construction cost of the ground improvement work.

  Therefore, in view of such a problem, the present invention eliminates the precipitation of a part of the insoluble transported material inside the transport tube in the transport tube for transporting the insoluble transported material, and always removes the insoluble transported material. It is an object of the present invention to provide a method for transporting an insoluble transport object and a transport device for the ground improvement work or dredging work that can be transported satisfactorily.

The first invention is provided with a conveyance pipe extending substantially in the horizontal direction when performing ground improvement work or dredging work, so that an insoluble conveyance article is placed inside the conveyance pipe, and the insoluble conveyance article is conveyed by the conveyance pipe. In the method of transporting insoluble transported objects in the ground improvement work or dredging work, when transporting insoluble transported goods through the transport pipe, the transport pipe is rotated at predetermined intervals, and the transport pipe is rotated to move inside the transport pipe. The insoluble transport object is transported by the transport pipe while eliminating a part of the insoluble transport object from sedimenting and depositing , and a plurality of transport pipes of a predetermined length are connected from the upstream side to the downstream side. In the transport pipe of the book, the transport pipe is rotated in order from the transport pipe provided on the downstream side toward the transport pipe provided on the upstream side. is there.

  The second invention is the first invention according to the first invention, provided with external force action means for applying a force such as impact or vibration to the insoluble transported object inside the transport pipe from the outside, while rotating the transport pipe or after rotating, This is a method for transporting insoluble transported objects in ground improvement work or dredging work in which force is applied to the insoluble transported goods inside the transport pipe by the external force acting means to remove the insoluble transported goods accumulated in the transport pipe.

The third invention is a ground improvement work or dredging work provided with a transfer pipe extending in a substantially lateral direction so as to carry the insoluble conveyance goods inside when carrying out the ground improvement work or dredging work. In the apparatus for transporting insoluble transports in the apparatus, a rotation mechanism for rotating the transport pipe is provided, and when transporting the insoluble transport by the transport pipe, the transport mechanism rotates the transport pipe every predetermined time by the rotation mechanism. For the purpose of identification , the insoluble transported material is transported by the transport pipe while eliminating a part of the insoluble transported material from being settled inside , and the rotational position of the transport pipe is recognized by the transport pipe rotated by the rotation mechanism. It is a transport device for insoluble transported objects in the ground improvement work or dredging work provided with the mark .

  According to the present invention, when an insoluble transport object is transported by a transport pipe, the transport pipe is rotated every predetermined time, and by the rotation of the transport pipe, a part of the insoluble transport material is precipitated inside the transport pipe. The insoluble transported material is transported by the transport pipe while eliminating the accumulation in this way, so that a part of the insoluble transported material accumulated inside the transport pipe is solidified and the transport pipe is blocked. An insoluble conveyance thing can always be conveyed favorably. As a result, it is possible to eliminate the interruption of the ground improvement work or dredging work in order to perform the work of cleaning the transfer pipe as in the past or the work of replacing it with a new transfer pipe, and the workability is improved. By making it, it is possible to shorten the construction period in the ground improvement work or the dredging work, and the construction cost can be reduced.

  In addition, external force application means for applying an impact or vibration force from the outside to the insoluble conveyance inside the conveyance pipe is provided, and during or after the conveyance pipe is rotated, the external force application means By applying force to the insoluble transport material to remove the insoluble transport material that accumulates inside the transport tube, it is possible to easily remove the insoluble transport material that has accumulated inside the transport tube. Goods can be transported extremely well.

  In addition, in the plurality of transport pipes, the transport pipe is rotated in order from the transport pipe provided on the downstream side to the transport pipe provided on the upstream side, so that the downstream side can always flow easily. Accordingly, even if there are a plurality of transfer pipes, the insoluble transfer object accumulated in the transfer pipes can be made to flow well downstream.

It is the whole plant explanatory drawing in ground improvement construction. (A) It is sectional drawing which shows the state inside the conventional conveyance pipe. (B) It is sectional drawing which shows the state inside the conventional conveyance pipe | tube. It is explanatory drawing of the conveyance pipe in the conveying apparatus of the insoluble conveyance thing by this invention. It is explanatory drawing of the rotation mechanism part in the conveying apparatus of the insoluble conveyance thing by this invention. It is an AA expanded sectional view in FIG. (A) It is sectional drawing which shows the state inside the conveyance pipe of this invention. (B) It is sectional drawing which shows the state inside the conveyance pipe of this invention. (C) It is sectional drawing which shows the state inside the conveyance pipe of this invention. It is explanatory drawing of the other rotation mechanism part in the conveying apparatus of the insoluble conveyance thing by this invention. It is explanatory drawing which shows an example of the external force action means in the conveying apparatus of the insoluble conveyance thing by this invention.

  A first embodiment of a method for transporting an insoluble transport object and a transport apparatus for the ground improvement work or dredging work of the present invention will be described. What is described here is a transport method and a transport device for transporting waste mud, which is an insoluble transported material ejected from the ground, in ground improvement work using the high-pressure jet stirring method. The insoluble transported material has a property that does not dissolve in the liquid. In the ground improvement work, it is cement milk or waste mud that is a ground improvement material, and in dredging work, it is dredged soil.

  First, the plant for performing the high-pressure jet agitation method is the same as the conventional plant. And in this plant, as a conveyance apparatus which conveys the waste mud which is an insoluble conveyance thing, first, the conveyance pipe 12 which conveys waste mud from the waste mud receiving tank 10 provided in the circumference | surroundings of the pipe rod 1 to the waste mud tank 11 is used. As shown in FIG. 3, the transport pipe 12 is used by connecting a plurality of, for example, 10 cylindrical transport pipes 12 having a diameter of about 7 to 15 cm and a length of about 10 m. doing. In the plurality of transport pipes 12, a pumping pump 13 is provided at the base end on the upstream side, and this is connected to the waste mud receiving tank 10, and the downstream side thereof is connected to the waste mud tank 11. A plurality of transport pipes 12 extending in a substantially lateral direction connected to the mud tank 11 from the mud tank 10 are provided.

  In each of the plurality of transport pipes 12, a rotation mechanism unit 20 that rotates the transport pipe 12 is provided. As shown in FIG. 4 and FIG. 5, the rotation mechanism unit 20 connects a plurality of transport pipes 12 by using a swivel joint 22 having a rotation unit 21 that is rotatable on both sides. The two transport pipes 12 connected to the rotating portions 21 on both sides of the swivel joint 22 can be freely rotated. Note that the swivel joint 22 is also used at the end portion of the plurality of transport pipes 12 positioned at the chopsticks so that the transport pipe 12 positioned at the chopsticks can freely rotate. Each of the transport pipes 12 is provided with a rotation support base 23 below each of both ends thereof. The rotation support base 23 includes a base body 24 and two guides provided on the top of the base body 24 so as to be freely rotatable. The roller 25 includes the two guide rollers 25, and the conveyance tube 12 is rotatably supported from below. The conveyance tube 12 can be rotated by the two guide rollers 25.

  In addition, a protruding fitting pin 26 used when rotating the conveying tube 12 is provided on the outer periphery of each conveying tube 12, and a rod-shaped rotating tool 27 can be fitted into the fitting pin 26. It can be so. In addition, you may make it provide this protrusion-shaped fitting pin 26 not on the outer periphery of the conveyance pipe | tube 12, but on the outer periphery of the rotation part 21 of the swivel joint 22. FIG.

  In addition, an identification mark is provided on the transport pipe 12 or the like so that when the transport pipe 12 is rotated by the rotation mechanism unit 20, the rotation position of the transport pipe is known. As the identification mark, a different color is applied to the outer periphery of the transport pipe 12 or to the outer periphery of the rotating portion 21 of the swivel joint 22 that connects the transport pipe 12. And the other half is blue. In addition, as a mark for identification, a symbol, a character, or the like may be added instead of adding a color. For example, 30, 60, 90, and 120, which are numbers representing angles, are added up to 360. Thus, the rotation angle may be indicated.

  As described above, in the rotation mechanism unit 20, the operator uses the rotation tool 27, and the rotation tool 27 is fitted into the fitting pin 26 of the transport pipe 12. The conveying tube 12 can be rotated by the rotating tool 27.

  In such an insoluble transported material transport apparatus provided with the rotation mechanism unit 20 for rotating the transport pipe 12, as a transport method thereof, in the ground improvement work, waste mud that is an insoluble transported material is transferred by a plurality of transport pipes 12. When transporting, the plurality of transport pipes 12 are rotated every predetermined time, and by the rotation of the transport pipe 12, it is possible to prevent some of the mud from being settled and deposited inside the transport pipe 12, The sludge is transported to the downstream sludge tank 11 by the transport pipe 12.

  This is because when the waste mud, which is an insoluble conveyance product, is conveyed by the conveyance pipe 12, the operator manually uses the rotation tool 27 in the rotation mechanism unit 20 every predetermined time, for example, 20 to 30 minutes. The transport pipe 12 is rotated every time. The rotation angle at this time is 180 degrees, that is, the upside down of the transport pipe 12 is turned upside down. Note that the rotation angle is not limited to 180 degrees, and may be other angles such as 90 degrees and 120 degrees. Mud can be easily removed.

  Then, in the plurality of transport pipes 12, the rotation order is from the transport pipe 12 provided on the downstream side on the mud tank 11 side to the transport pipe 12 provided on the upstream side on the waste mud receiving tank 10 side. In order. Thus, by rotating the conveyance pipe 12 in order from the conveyance pipe 12 on the downstream side toward the conveyance pipe 12 on the upstream side, it is possible to always keep the downstream side in a state where it is easy to flow. Even in the transport pipe 12, the waste mud accumulated in the transport pipe 12 can flow well downstream. However, in the plurality of transport pipes 12, it is not always necessary to rotate the transport pipes 12 in order, and all of the plurality of transport pipes 12 may be rotated simultaneously.

  Moreover, about rotation of the conveyance pipe | tube 12 in the rotation mechanism part 20, it is made to rotate for every predetermined time, However, This predetermined time is not limited to 20-30 minutes mentioned above, It conveys. It varies depending on the soil and soil properties of the mud, which is an insoluble transported material that is transported by the pipe 12, and may be, for example, every 1 hour or 2 hours. Furthermore, cement milk that is a ground improvement material in ground improvement work This time is also different when transporting insoluble transported materials such as clay in dredging work. Therefore, it is preferable to determine in advance by a test, an experiment, or the like so that the optimum time is obtained according to the insoluble conveyed product to be conveyed.

  In the transport method and the transport apparatus for transporting the waste mud that is an insoluble transport product as described above, when transporting the waste mud that is an insoluble transport product through the transport pipe 12, as shown in FIG. Even if a part of the mud (having a heavy specific gravity) settles and accumulates inside the transport pipe 12, the operator manually rotates the transport pipe 12 every 20 to 30 minutes. Accordingly, as shown in FIG. 6B, the conveying pipe 12 is turned upside down, and the accumulated waste mud is dropped and removed before solidifying, and a part of the mud is settled inside the conveying pipe 12. Thus, it is possible to eliminate deposition. As a result, as shown in FIG. 6C, the accumulated waste mud does not solidify and block the transport pipe 12, and the transport pipe 12 can always transport the sludge satisfactorily. It becomes like this.

  Further, in the above-described transport method and transport device for transporting waste mud that is an insoluble transport product, the transport pipe 12 is provided with external force acting means. As this external force acting means, a force such as impact or vibration is applied from the outside to the waste mud that is an insoluble transported material inside the transport pipe 12, and for example, if it is performed manually, a hammer or the like is hit It is a tool.

  And after an operator uses the impact tool which is such an external force action means and rotates the conveyance pipe 12, the outside of the conveyance pipe is struck with this impact tool, and the mud inside the conveyance pipe 12 is exposed from the outside. By applying an impact, the mud accumulated in the inside of the transport pipe 12 turned upside down is dropped, so that the mud is removed.

  In this way, after the transport pipe 12 is rotated, the operator manually applies an impact to the sludge inside the transport pipe 12 by using an impact tool, so that the mud accumulated in the transport pipe 12 is accumulated. Can be easily dropped by the impact force of the impact tool, whereby the accumulated mud can be easily removed, and the transport of the mud in the transport pipe 12 can be performed very well.

  Further, the external force acting means is not limited to one that is manually performed using the above-described impact tool, but may be one that applies an impact to the transport pipe 12 by other means. Further, in addition to those that apply impact to the transport pipe 12, those that apply vibration to the transport pipe 12, or those that inject compressed air into the transport pipe 12 and apply impact by compressed air may be used. The vibrator that applies vibration to the transport pipe 12 is a vibrator provided under the transport pipe 12. The vibrator is used to vibrate the transport pipe 12, and the waste mud inside the transport pipe 12 is exposed from the outside. Add vibration. As an example of applying an impact by compressed air by injecting compressed air into the conveying pipe 12, for example, an injection port is provided in the swivel joint 22 that connects each conveying pipe 12, and compressed air is injected from here. The air injection device is used to inject compressed air into the inside of the conveying pipe 12 by using this air injecting device, and to apply the impact of the compressed air to the mud inside the conveying pipe 12.

  In addition, when applying force to the sludge which is an insoluble conveyance thing inside the conveyance pipe 12 by an external force action means, it was performed after rotating the conveyance pipe 12, but this is in the middle of rotating the conveyance pipe 12. You may make it do. In particular, when using a vibrator or injecting compressed air, the waste mud accumulated inside the transport pipe 12 can be removed more quickly if it is performed while the transport pipe 12 is rotating.

  Next, a transport method for transporting waste mud that is an insoluble transport object and a second embodiment of the transport apparatus will be described.

  In the above-described first embodiment, the operator manually rotates the transport pipe 12, but this is automatically performed. As shown in FIG. 7, first, in the rotation mechanism unit 20 provided in each of the transport pipes 12, as the rotation support base 23, a base body 24 and two rotatable parts provided on the top of the base body 24 are provided. A ring-shaped gear 29 that includes the gear 28 and meshes with the two gears 28 is provided on the outer periphery of the transport pipe 12. The motor 30 is attached to one of the two gears 28.

  Further, the motor 30 of the rotation mechanism unit 20 provided in each transport pipe 12 is controlled by a controller (not shown), and operates every 20 to 30 minutes which is a predetermined time. Rotate 180 degrees.

  At this time as well, the controller controls the plurality of transport pipes 12 to rotate in order from the transport pipe 12 provided on the downstream side toward the transport pipe 12 provided on the upstream side.

  Since the conveyance pipe 12 is automatically rotated in this way, if there are about five or six conveyance pipes 12, even if one worker performs it manually, it will not be so much labor. However, when the number is 10 or more, it is quite heavy labor for the operator to manually rotate the transport pipe 12, and the work efficiency is deteriorated, but the transport pipe 12 is automatically rotated. Therefore, this can be performed very easily, and the working efficiency can be improved.

  As another example of the automatic rotation of the conveying pipe 12 described in the second embodiment, in the above-described one, the rotation mechanism unit 20 includes two gears 28 on the rotation support base 23. In addition, the ring-shaped gear 29 is provided on the outer periphery of the transport pipe 12, but instead, two guide rollers 25 similar to those described in the first embodiment are provided, and this The motor 30 may be attached to either one of the two guide rollers 25.

  Furthermore, an external force acting means may be provided on the transport pipe 12 here. As an external force acting means at this time, for example, the guide roller 25 to which the motor 30 is attached is formed into an egg-shaped cam, and when the egg-shaped cam-shaped guide roller 25 is rotated once (360 degrees), the conveyance tube 12 is rotated 180 degrees. As a result, as shown in FIG. 8, while the egg-shaped cam-shaped guide roller 25 makes one rotation, the transport pipe 12 is lifted and dropped by the egg-shaped cam-shaped guide roller 25, and falls. Occasionally, the impact is applied to the transport pipe 12, so that the impact can also be applied to the mud inside the transport pipe 12, and the mud accumulated in the transport pipe 12 can be easily removed.

  In the first or second embodiment described above, the transport method and the transport device for transporting an insoluble transport object such as waste mud ejected from the ground in the ground improvement work by the transport pipe 12 are used. The insoluble transported material is not limited to waste mud, but may be cement milk that is a ground improvement material supplied to the tube rod 1 in the ground improvement work, and dredged soil generated in the dredging work, that is, A transport method and a transport apparatus for transporting insoluble transported objects such as cement milk as a ground improvement material in ground improvement work and dredged soil in dredging work by a transport pipe may be used.

DESCRIPTION OF SYMBOLS 1 ... Pipe rod, 2 ... Construction machine, 3 ... Mast, 4 ... Cement silo, 5 ... Cement production | generation apparatus, 6 ... High pressure pump, 7 ... Conveyance pipe, 10 ... Waste mud receiving tank, 11 ... Waste mud tank, 12 ... Conveyance Pipe, 13 ... Pressure feed pump, 14 ... Vacuum wheel, 20 ... Rotating mechanism part, 21 ... Rotating part, 22 ... Swivel joint, 23 ... Rotation support base, 24 ... Base body, 25 ... Guide roller, 26 ... Fitting pin, 27 ... Rotary tool, 28 ... Gear, 29 ... Gear, 30 ... Motor

Claims (3)

When performing ground improvement work or dredging work, the ground improvement work or dredging is equipped with a transfer pipe that extends substantially in the horizontal direction, and an insoluble transfer object is placed inside the transfer pipe so that the insoluble transfer object is transferred by the transfer pipe. In the method of transporting insoluble transports in construction work,
When transporting insoluble transported material through a transport tube, the transport tube is rotated at predetermined intervals, and by rotating the transport tube, the insoluble transported material is prevented from being deposited and deposited inside the transport tube. In addition, the insoluble conveyance object is conveyed by the conveyance pipe, and a plurality of conveyance pipes having a predetermined length are connected from the upstream side to the downstream side, and the rotation of the conveyance pipe is provided on the downstream side in the plurality of conveyance pipes. A method for transporting insoluble transported objects in ground improvement work or dredging work, which is performed in order from the transport pipe toward the transport pipe provided on the upstream side.   Provided with external force application means that applies external force such as impact or vibration to the insoluble conveyance inside the conveyance pipe, and during or after the rotation of the conveyance pipe, the insoluble conveyance inside the conveyance pipe by the external force application means 2. The method for transporting insoluble transported material in ground improvement work or dredging work according to claim 1, wherein force is applied to remove the insoluble transported material accumulated in the transport pipe. When performing ground improvement work or dredging work, transporting insoluble transported goods in ground improvement work or dredging work with a substantially horizontally extending transport pipe that allows insoluble transported goods to be transported inside. In the device
When a rotation mechanism that rotates the transfer tube is provided and the insoluble transfer material is transferred by the transfer tube, the rotation tube rotates the transfer tube every predetermined time by the rotation mechanism, and a part of the insoluble transfer product inside the transfer tube. The insoluble conveyance object is conveyed by the conveyance pipe while eliminating sedimentation and accumulation, and the conveyance pipe rotated by the rotation mechanism portion is provided with an identification mark for identifying the rotation position of the conveyance pipe. Equipment for insoluble transport in ground improvement or dredging work.

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